Part of #579: vectorcraft-cli lists the fonts font services load too

The DirectWrite font lister (#594) was installed in the desktop app only:
`vectorcraft-cli` (convert, run, MCP) didn't see fonts that font services
such as Adobe Fonts load on Windows, so its exports set such type in a
fallback font.

- The CLI shares the app's `system_fonts.rs` and installs it first thing
  on Windows (not the win7 build). The text crate stays free of unsafe
  code; the CLI denies unsafe code instead of forbidding it, so the
  shared module's own allowance applies.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Cargo.lock

@@ -4296,7 +4296,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "arboard",
  "block2 0.6.2",
@@ -4312,15 +4312,17 @@ dependencies = [
  "rfd",
  "serde_json",
  "vectorcraft-engine",
+ "vectorcraft-text",
  "vectorcraft-ui-egui",
  "webbrowser",
+ "windows",
  "winit",
  "winresource",
 ]
 
 [[package]]
 name = "vectorcraft-brush"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "kurbo 0.13.1",
  "serde",
@@ -4332,7 +4334,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-cad"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "kurbo 0.13.1",
@@ -4348,8 +4350,9 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-cli"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
+ "log",
  "serde_json",
  "vectorcraft-color",
  "vectorcraft-doc",
@@ -4360,11 +4363,13 @@ dependencies = [
  "vectorcraft-render",
  "vectorcraft-svg",
  "vectorcraft-testkit",
+ "vectorcraft-text",
+ "windows",
 ]
 
 [[package]]
 name = "vectorcraft-color"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "kurbo 0.13.1",
  "moxcms",
@@ -4376,7 +4381,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-doc"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "jpeg-encoder",
@@ -4393,7 +4398,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-effects"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "kurbo 0.13.1",
  "serde_json",
@@ -4407,7 +4412,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-engine"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "flate2",
  "image",
@@ -4439,7 +4444,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-eps"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "flate2",
  "image",
@@ -4457,7 +4462,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-format"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "flate2",
  "proptest",
@@ -4471,7 +4476,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-geom"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "kurbo 0.13.1",
  "proptest",
@@ -4483,7 +4488,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-mcp"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "log",
@@ -4502,7 +4507,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-metafile"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "kurbo 0.13.1",
@@ -4516,7 +4521,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-pathops"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "kurbo 0.13.1",
  "linesweeper",
@@ -4528,7 +4533,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-pdf"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "aes",
  "flate2",
@@ -4557,7 +4562,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-plugins"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -4571,7 +4576,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-render"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "flate2",
  "gif",
@@ -4596,7 +4601,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-svg"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "flate2",
  "image",
@@ -4620,7 +4625,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-testkit"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "kurbo 0.13.1",
@@ -4637,7 +4642,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-text"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "harfrust 0.13.3",
  "kurbo 0.13.1",
@@ -4655,7 +4660,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-tools"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "kurbo 0.13.1",
@@ -4670,7 +4675,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-trace"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "image",
  "kurbo 0.13.1",
@@ -4683,7 +4688,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-ui-egui"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "egui",
  "egui_extras",
@@ -4712,7 +4717,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-web"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "eframe",
  "egui",
@@ -5815,7 +5820,7 @@ checksum = "9440ea3e5aeabb0ac63af70daf835274065238cdd0cec83418f417eae38bacee"
 
 [[package]]
 name = "xtask"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "serde_json",
 ]

Cargo.toml

@@ -4,7 +4,7 @@ members = ["crates/*", "apps/*", "xtask"]
 default-members = ["crates/*", "apps/vectorcraft", "apps/vectorcraft-cli", "xtask"]
 
 [workspace.package]
-version = "0.6.0"
+version = "0.7.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"

README.md

@@ -194,7 +194,7 @@ milestones, and honest time-to-parity estimates.
 "a power user can't tell the difference". Everyday vector illustration is close to usable: drawing and path tools,
 Pathfinder and Shape Builder, paint, gradients, appearance and transparency, type with styles, threading and Hebrew/Arabic bidirectional layout, and
 files (SVG, PDF and PDF-compatible `.ai` with PDF/X, EPS, DXF, EMF/WMF, raster formats and PSD, Print, Package). The interface
-speaks English, Japanese, Traditional and Simplified Chinese, Spanish and Italian (and Czech and Brazilian Portuguese in the menus).
+speaks English, Japanese, Traditional and Simplified Chinese, Spanish, Italian and Russian (and Czech and Brazilian Portuguese in the menus).
 The scores are
 self-assessed, so the [honest assessment](ROADMAP.md#honest-assessment-2026-10-05) explains how far to trust them.
 

ROADMAP.md

@@ -4,7 +4,7 @@ VectorCraft is a clean-room, open-source, pure-Rust reimplementation of the Adob
 
 This file tracks **how far we are and what's left**. Time estimates are wall-clock hours of continuous Claude Opus 5.5 agent work (including builds and the CI gate), given both for **one agent** and for **4–6 parallel agents** on disjoint crates. They are counted from the remaining work (see [Parity estimate](#parity-estimate)), calibrated against measured throughput, and updated as work lands.
 
-_Last updated: 2026-10-08 (after M4.14–M4.98, M8.1–M8.20, M14.4–M14.7, the MCP prompts, resource templates, completions and logging, the 2026-10-07 issue fixes, the Layers panel rework and the 2026-10-08 community contributions: Pen and shape-tool modifiers, path editing, Layers, Artboards, Swatches/Brushes and dialogs, Japanese composition and PDF text, Hebrew/Arabic type, interface languages (Spanish among them), the font menu, saved selections, MCP and EPS, the missing-font export warning (#319), open paths in the Shape Builder (#374), PDF/`.ai` import keeping strokes live and hidden and nested layers (#372), per-corner Live Corners (#381), SVG type opening at the size it draws at (#396), the Wayland clipboard with copied-file paste (#398), ruler guides that can be selected, moved and deleted (#414), two batches of Preferences options that were stored but unused (#394), skeleton reads with `document.find` for large documents over MCP (#416) and anchors dragged with Direct Selection snapping to points, segments and smart guides, clipped SVG layers opening as clipping layers (#420), PDF/`.ai` layers read on pages of tens of millions of operators (#419), Document Color Mode putting RGB greys on the black plate on request and converting pattern tiles (#421) and movable dialogs with Offset Path's Joins dropdown (#423) and numeric fields scrubbed by dragging their label (#400), stroke weight presets in the stroke unit (#426), the Appearance panel's Opacity popup (#430), type on a path brackets, flip and Type on a Path Options that keep the type in place (#429), Layers rows dragged with a ghost and dropped on the trash or New Layer (#435), tool flyouts opening on a right or corner press (#436), tool flyouts torn off into floating toolbars (#437), the Shape Builder's erase mode deleting edges too (#439), installed fonts registered outside the font folders and fonts installed while the app runs listed in the font menus (#443), alike circular corners on rectangles that aren't square (#442), tool cursors as OS cursors so the pointer no longer trails over the canvas (#444), artboards copied and pasted with their art (#446), guides dragged out of the rulers snapping to the art's side midpoints and the artboards, artboard guides (#451), the toolbar's double arrow and Window › Toolbars › Double Column switching between one and two columns in any window height (#455), the Smart Guides display options and Snapping Tolerance (#394), Font Size and Leading combo boxes with preset lists in the Character and Properties panels and the Control bar (#458), screenshots pasted from the clipboard on macOS, Windows and the web (#457), the Properties panel's Fill and Stroke matching the Control bar's, Illustrator's Window menu panel keys (Shift+F7 for Align…) and Alt-wheel zoom whatever the wheel preference (Discord feedback), the point/area type widget (Discord feedback), groups in legacy Illustrator .ai files (Discord feedback), a rotating desktop log file (#465), image controls in the Control bar and Properties panel: Image Trace with its presets, Mask, Crop Image, Embed/Unembed, and an Image Trace object's preset, Expand and Release (Discord feedback), the Pen working as the Anchor Point tool with Alt held over a selected path's handles and anchors, and anchor buttons that convert, connect and cut paths at the selected anchors (Discord feedback), Japanese hanging punctuation (burasagari, #463), Escape leaving Presentation Mode with no screen mode saved across restarts, documents dropped on the desktop app opening as tabs of their own and a note that an `.ai` file's art off its artboards isn't in the part read (#472), Add/Delete Anchor Point tool icons drawn from the Pen tool's (#479), EPS import running more of PostScript Level 3 (patterns, Type 3 fonts, mesh shadings, masked images, VM and resource probes), and a preview that stands in saying why (Discord feedback, #466, #469, #474), chords with modifiers recorded in Edit › Keyboard Shortcuts (#487), Type Object Selection by Path Only (#394), Anti-aliased Artwork (#394), Show Pixel Grid (#394), pen and touch taps pressed and lifted within one frame clicking where they tapped and the Linux/Wayland pen-tablet workaround (#491), bounding-box resizes landing on the other objects' anchors and centres with labels, and the Rotate, Scale, Shear and Reflect tools snapping their drags (#482), Shift-drag marquees that toggle the objects or anchors they reach and a Lasso whose Alt subtraction keeps the rest of the selection (#483), the mouse wheel stepping the focused numeric field, the dialogs' and preferences' drag values made such fields (#485), Show The Home Screen When No Documents Are Open (#394), Numbers Without Units Are Points (#394), Auto-Collapse Iconic Panels (#394), the Contextual Task Bar moved by its handle and its More Options menu pinning and resetting its position, a designed macOS DMG window (#493), panels, panel groups and the Tools panel undocking into flLine truncated
+_Last updated: 2026-10-09 (after placed documents (File › Place of a `.vectorcraft` file, linked), M4.14–M4.98, M8.1–M8.20, M14.4–M14.7, the MCP prompts, resource templates, completions and logging, the 2026-10-07 issue fixes, the Layers panel rework and the 2026-10-08 community contributions: Pen and shape-tool modifiers, path editing, Layers, Artboards, Swatches/Brushes and dialogs, Japanese composition and PDF text, Hebrew/Arabic type, interface languages (Spanish among them), the font menu, saved selections, MCP and EPS, the missing-font export warning (#319), open paths in the Shape Builder (#374), PDF/`.ai` import keeping strokes live and hidden and nested layers (#372), per-corner Live Corners (#381), SVG type opening at the size it draws at (#396), the Wayland clipboard with copied-file paste (#398), ruler guides that can be selected, moved and deleted (#414), two batches of Preferences options that were stored but unused (#394), skeleton reads with `document.find` for large documents over MCP (#416) and anchors dragged with Direct Selection snapping to points, segments and smart guides, clipped SVG layers opening as clipping layers (#420), PDF/`.ai` layers read on pages of tens of millions of operators (#419), Document Color Mode putting RGB greys on the black plate on request and converting pattern tiles (#421) and movable dialogs with Offset Path's Joins dropdown (#423) and numeric fields scrubbed by dragging their label (#400), stroke weight presets in the stroke unit (#426), the Appearance panel's Opacity popup (#430), type on a path brackets, flip and Type on a Path Options that keep the type in place (#429), Layers rows dragged with a ghost and dropped on the trash or New Layer (#435), tool flyouts opening on a right or corner press (#436), tool flyouts torn off into floating toolbars (#437), the Shape Builder's erase mode deleting edges too (#439), installed fonts registered outside the font folders and fonts installed while the app runs listed in the font menus (#443), alike circular corners on rectangles that aren't square (#442), tool cursors as OS cursors so the pointer no longer trails over the canvas (#444), artboards copied and pasted with their art (#446), guides dragged out of the rulers snapping to the art's side midpoints and the artboards, artboard guides (#451), the toolbar's double arrow and Window › Toolbars › Double Column switching between one and two columns in any window height (#455), the Smart Guides display options and Snapping Tolerance (#394), Font Size and Leading combo boxes with preset lists in the Character and Properties panels and the Control bar (#458), screenshots pasted from the clipboard on macOS, Windows and the web (#457), the Properties panel's Fill and Stroke matching the Control bar's, Illustrator's Window menu panel keys (Shift+F7 for Align…) and Alt-wheel zoom whatever the wheel preference (Discord feedback), the point/area type widget (Discord feedback), groups in legacy Illustrator .ai files (Discord feedback), a rotating desktop log file (#465), image controls in the Control bar and Properties panel: Image Trace with its presets, Mask, Crop Image, Embed/Unembed, and an Image Trace object's preset, Expand and Release (Discord feedback), the Pen working as the Anchor Point tool with Alt held over a selected path's handles and anchors, and anchor buttons that convert, connect and cut paths at the selected anchors (Discord feedback), Japanese hanging punctuation (burasagari, #463), Escape leaving Presentation Mode with no screen mode saved across restarts, documents dropped on the desktop app opening as tabs of their own and a note that an `.ai` file's art off its artboards isn't in the part read (#472), Add/Delete Anchor Point tool icons drawn from the Pen tool's (#479), EPS import running more of PostScript Level 3 (patterns, Type 3 fonts, mesh shadings, masked images, VM and resource probes), and a preview that stands in saying why (Discord feedback, #466, #469, #474), chords with modifiers recorded in Edit › Keyboard Shortcuts (#487), Type Object Selection by Path Only (#394), Anti-aliased Artwork (#394), Show Pixel Grid (#394), pen and touch taps pressed and lifted within one frame clicking where they tapped and the Linux/Wayland pen-tablet workaround (#491), bounding-box resizes landing on the other objects' anchors and centres with labels, and the Rotate, Scale, Shear and Reflect tools snapping their drags (#482), Shift-drag marquees that toggle the objects or anchors they reach and a Lasso whose Alt subtraction keeps the rest of the selection (#483), the mouse wheel stepping the focused numeric field, the dialogs' and preferences' drag values made such fields (#485), Show The Home Screen When No Documents Are Open (#394), Numbers Without Units Are Points (#394), Auto-Collapse Iconic Panels (#394), the Contextual Task Bar moved by its handle and its More Options menu pinning and resetting its position, a designed macOS DMG windoLine truncated
 
 ## Where we are
 
@@ -52,7 +52,7 @@ Ordered by how much each gap blocks someone from switching. Sizes are one-agent
 
 1. **Interaction fidelity:** go tool by tool and panel by panel against `plan/illustrator/05-tools.md`,
    `06-panels.md` and `09-shortcuts.md`, covering modifier keys, cursors, the Properties panel per context and
-   isolation mode. Do it side by side with Illustrator where the owner allows. 60–90 h.
+   isolation mode. The Shaper’s rough-square recognition and shape orientation steps are corrected; Shaper Groups now retain editable originals for region merges/punches and separate fill/stroke edits; their construction-mode widget and gesture refinements remain. 60–90 h.
 2. **Photoshop-style raster effects and the Effect Gallery:** about 55 filters (Artistic, Brush Strokes, Distort,
    Pixelate, Sketch, Stylize, Texture, Video) on the raster pipeline that drop shadows already use, applied at
    Document Raster Effects Settings resolution. Parallelizes well across agents. 28–42 h.
@@ -60,9 +60,10 @@ Ordered by how much each gap blocks someone from switching. Sizes are one-agent
    renderer in its own crate (layering allows it below L6), with output in SVG/PDF as rasters or projected vectors.
    The largest single gap. 50–80 h.
 4. **Advanced type:** CJK composition for vertical type (ruby, mojikumi, proportional vertical metrics, manual
-   tate-chu-yoko), Optical Margin Alignment, the composer/hyphenation options, tab leaders, a
+   tate-chu-yoko), Optical Margin Alignment, the hyphenation and justification options (the Every-line/Single-line
+   composer choice is done), tab leaders, a
    spell-check dictionary (open licence), Touch Type and Snap to Glyph. Vertical point, area and path type have
-   initial support. 35–48 h across type core and advanced.
+   initial support. 34–47 h across type core and advanced.
 5. **Brushes, symbols and libraries:** brush options depth; original brush, symbol and graphic-style libraries
    generated in code (never Adobe's); dynamic symbols; Start Global Edit; brushes driven by pen tilt, bearing and
    barrel rotation (6D art pens, #372), which needs tablet input beyond pressure on every platform. 20–32 h.
@@ -101,8 +102,8 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
   - Tool flyouts tear off: dragging or clicking the tear-off bar on a flyout's right side (or releasing the long press over it) floats its group as a strip of tool buttons, moved by the same bar and put back in the toolbar by the × at its top (`window.floatTools`). While a group floats, the presses that would open its flyout raise the strip instead. Floating strips are kept with the preferences and in user workspaces. Not done: turning a strip vertical, docking it.
   - Panels undock (#495): a dock tab, a panel icon or a popped-out panel's title dragged out of the dock floats that panel inside the window, and the strip right of the dock's tabs floats the whole tabbed group. A floating group moves by its title bar, a tab dragged out of it floats on its own, and dropped on another group's title bar or tabs it stacks with that group; dropped on the dock, which lights up under the pointer, its panels go back where they live (the tabbed group or the icon column), as its × and the panel menus' Float Panel / Dock Panel do (`window.panel.float`, `window.panel.dock`). The Tools panel floats by its title bar and docks again on the window's left edge. Floating panels and the Tools panel's position are kept with the preferences and in user workspaces, and clamped into a smaller window. Not done: panels in separate OS windows, docking a panel into a dock group it doesn't belong to, reordering tabs by dragging, collapsing a floating group to icons, resizing floating panels.
   - The dock's double arrow collapses Properties, Layers and Libraries to icons at the top of the icon column, popping out like the other icon panels, and expands them again (`window.collapseDock`, kept with the preferences and in saved workspaces). The icon column's own arrow (expanding the icon panels into a full column) is not done.
-  - Localised UI: menus (in-window and native), panels, dialogs, toolbar and Preferences read from per-language catalogs (`crates/ui-egui/src/i18n`, see `docs/development.md`); Traditional Chinese (Taiwan), Simplified Chinese (mainland), Japanese, Spanish and Italian ship complete, and Czech and Brazilian Portuguese cover every menu label (and more), with system-locale detection on macOS, Windows, Linux and the web (the browser's languages, or `?lang=`), a VectorCraft ▸ Language menu and a Language preference. Names are never translated (fonts and their styles, layers, artboards, saved presets, user libraries, custom workspaces, recent files, plug-ins).
-  - Native macOS menu bar, vector tool cursors, a ⌘K command palette, middle-button panning with any tool.
+  - Localised UI: menus (in-window and native), panels, dialogs, toolbar and Preferences read from per-language catalogs (`crates/ui-egui/src/i18n`, see `docs/development.md`); Traditional Chinese (Taiwan), Simplified Chinese (mainland), Japanese, Spanish, Italian and Russian ship complete, and Czech and Brazilian Portuguese cover every menu label (and more), with system-locale detection on macOS, Windows, Linux and the web (the browser's languages, or `?lang=`), a VectorCraft ▸ Language menu and a Language preference. Names are never translated (fonts and their styles, layers, artboards, saved presets, user libraries, custom workspaces, recent files, plug-ins).
+  - Native macOS menu bar, vector tool cursors, a ⌘K command palette, middle-button panning with any tool. Native menus explicitly end tracking on command selection, outside window presses and Escape; menu updates wait until tracking ends, and a dismissing press never starts a canvas gesture (M14.8).
   - The macOS menu bar is built from the in-window menus (one model, `native_menu`) and laid out as a Mac app's: the VectorCraft menu holds About, Settings ▸ (each Preferences page, General… ⌘K), Language ▸, Appearance ▸ (UI brightness), Services, Hide VectorCraft ⌃⌘H (⌘H stays Hide Edges), Hide Others, Show All and Quit; Window gains Minimize ⌃⌘M, Zoom and Bring All to Front, and Help the system's search field. Its key equivalents go back to egui as key presses, so user shortcuts, focused text fields and the Type tool's input method behave as in the window, and nothing fires twice; enabled, check marks and labels update in place. `--in-window-menus` or `VECTORCRAFT_IN_WINDOW_MENUS=1` keeps the menus in the window; `ui.inspect` reports `nativeMenuBar`.
   - macOS: Finder opens every format File › Open reads with VectorCraft (double-click, Open With, a drop on the Dock icon, `open -a`), at launch or while it runs; the release and `cargo xtask bundle` apps share one `Info.plist` that declares those document types, owning only VectorCraft's own formats. The DMG opens on a designed Finder window, VectorCraft.app beside the `Applications` link over a background with the app icon (#493).
   - A canvas context menu: right-click selects the object under the pointer and lists what applies to the selection (Undo/Redo, clipboard, group, isolation, join, Remove Anchor Points when anchors are selected, masks, compound paths, guides, Transform, Arrange, Select, Export Selection), or the view commands on empty canvas.
@@ -112,10 +113,12 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
   - Dialogs move by dragging their heading (the band down from the top edge, as a title bar), stay on screen and keep where they were moved for the session; the form dialogs' choices are dropdowns (Offset Path's Joins, Average's and Shear's and Reflect's axis), and Offset Path lists Offset, Joins, Miter Limit and previews (#423).
   - Dialogs open with their first field focused and its value selected: type a value and press Enter (Move, Rotate, Scale…). Number fields in panels, the Control bar and dialogs (preferences too) step with Up/Down, or with the mouse wheel over the focused field (#485: a notch a step; the panel under it then stays put, and an unfocused field leaves the wheel to scrolling) (Shift: ten, Ctrl/Cmd: a tenth of their unit), applied at once.
   - Scrubby labels (#400, beyond Illustrator, as in Photoshop): dragging a numeric field's label left or right (the ↔ cursor shows over it) steps the value one unit every 2 points (Shift: ten, Ctrl/Cmd: a tenth; counts stay whole), in the field's unit and within its limits, applied live as the art follows; the whole drag is one undo step and Escape puts the value back. A click on the label focuses the field; the text box itself never scrubs, and a field with no label doesn't. Text labels before a field (Transform, Properties, Control bar, Stroke, Transparency, form rows in dialogs) and the Character and Paragraph panels' icons act as labels. Preferences › General › Scrub Numeric Fields by Dragging (on by default) turns it off.
+  - The Control bar's underlined Transform link opens the Transform panel in a popover under it (reference point, X/Y/W/H, Rotate and Shear with their icons and angle presets, flips, shape properties, Scale Corners and Scale Strokes & Effects), as its Stroke link does the Stroke panel; X/Y/W/H also show inline while the bar has room. The reference point locator is nine squares, the outer eight joined around the box.
   - Tab shows and hides the panels (in the Type tool it types a tab) without moving the keyboard focus onto a field, so the next shortcut or letter still works; in dialogs and panel fields it moves between fields.
-  - Cmd/Ctrl+A follows the keyboard: in a panel, dialog or search field it selects the field's text, while the Type tool edits it selects all of that text (also `select.all` over MCP), and only otherwise every object. On macOS the menu bar's Select All, Cut, Copy and Paste (keys or clicks) act on a focused field too. Not yet: Select All across threaded frames (one frame's text is selected).
+  - Cmd/Ctrl+A follows the keyboard: in a panel, dialog or search field it selects the field's text, while the Type tool edits it selects all of that text (also `select.all` over MCP), and only otherwise every object. On macOS the menu bar's Select All, Cut, Copy and Paste (keys or clicks) act on a focused field too, and elsewhere the in-window menus' do: the field that had the keyboard when the menu opened gets them, with its selection, and the keyboard back (#516). Not yet: Select All across threaded frames (one frame's text is selected).
   - On Windows and Linux the app bar is the window's title bar (its own minimize, maximize and close buttons, drag to move, edges to resize), with the dragon app icon as the brand mark; dialogs and menus size to their content. As on a native menu bar, once one menu is open, moving the pointer onto another title opens that one.
 - **Tools:**
+  - **Shaper:** uneven squares and rectangles become live rectangles even when drawing begins mid-edge. Recognition uses uniformly spaced samples and closed-loop corners, fits rectangle edges/angles rather than requiring a nearly perfect bounding-box fill, and includes the pointer-release position. Rectangles/squares and ellipses snap to 45° steps, hexagons to 90°, and triangles point up or down; lines keep their free angle even with Shift. Shaper Groups retain the live originals, merge regions with the gesture-origin fill, punch fills independently from strokes, remove boundaries on exiting scribbles and trim protruding stroke pieces. Source moves/resizes re-evaluate the result in the same undo step; double-click enters construction editing. Native save/reopen, face recoloring, Release and Expand are covered. The construction-mode widget and finer gesture heuristics remain.
   - **Selection:** Selection, Direct/Group Selection, Magic Wand, Lasso. A Shift-drag marquee toggles what it reaches: objects with the Selection tool, anchors with Direct and Group Selection (#483); the Lasso adds with Shift and subtracts with Alt. Dragging a path segment with Direct Selection bends it when it's curved (its anchors stay) and moves its two anchors when it's straight, one undo step; the fill, Shift or Alt still pick the whole path (Alt-drag copies it).
   - **Saved selections:** Select ▸ Save Selection… asks for a name and keeps the selection in the document (saved with the file, undoable, up to 25); each one is listed at the bottom of the Select menu and a click selects its objects again; Edit Selection… lists them to rename or delete, applied together on OK. A file's saved selections are capped and checked against its objects when it opens. Not yet: Update Selection and the Layers panel's saved-selection menu.
   - **Drawing:** Pen, Curvature, anchor tools, Pencil, Paintbrush, Blob Brush, Smooth, Path Eraser, Join. Direction handles dragged with Direct Selection or the Anchor Point tool snap to smart guides, and Shift keeps them at 45° steps from their anchor. Every point a drawing tool places snaps to Smart Guides through one snapper (#506): the Pen's and Curvature tool's anchors, the Pencil's ends, the shape tools' start and dragged corner or radius (Rectangle, Rounded Rectangle, Ellipse, Polygon, Star, Line Segment, Arc, Spiral, the grids), the Type tool's click and frame, a new artboard's corners.
@@ -137,10 +140,10 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
 - **Geometry and effects:**
   - Pathfinder (10 exact curve booleans), Offset, Outline Stroke, Simplify, Clean Up, Split Into Grid, Divide Objects Below. Object › Path › Remove Anchor Points (`path.removeAnchors`) removes the direct-selected anchors without opening their paths (the Delete key still deletes them with their segments): the neighbours keep their handle directions and their facing handles are refitted so one cubic follows the two old segments, and straight sides stay straight. The Delete Anchor Point tool uses the same refit. The Control bar, the contextual task bar, the Properties quick actions and the canvas context menu offer it when anchors are selected. With anchors selected, the Control bar and the Properties panel also convert them to corner or smooth (`path.convertAnchors`), connect end points (Join) and cut the path at them (`path.cutAtAnchors`, also on the task bar and the context menu): a closed path opens there and an open one becomes one path per piece, each cut leaving one of its two coincident anchors selected so a drag pulls the path apart.
   - Live effects with previewing dialogs: Distort & Transform, Path, Convert to Shape, 15 Warp styles, Round Corners, Scribble, Effect → Pathfinder (all 10 operations, live on groups; several loose objects are grouped first, in one undo step), Color Adjustments (Brightness/Contrast, Curves, Levels, Hue/Saturation, Shift to Color, Temperature/Tint, on vectors, live type and embedded images), and raster drop shadow, glows and feather. SVG and PDF export keep live effects (geometry baked; SVG raster effects as filters).
-- **Type:** Text Wrap, Type on a Path effects (Rainbow/Skew/3D Ribbon/Stair Step/Gravity) and Options (Flip, Align to Path, Spacing; OK keeps the type where it is), type on a path's start, centre and end brackets (Selection and Direct Selection drag them to set where the type runs, slide it along its path and, across the path, flip it: #429), Character and Paragraph Styles (override-preserving redefine), Area Type Options (rows/columns/inset/first baseline), threaded text across any closed shapes, Fit Headline. Area type resizes like Illustrator's type areas: a bounding-box handle drag (Selection tool) or Area Type Options Width/Height size the frame and the text reflows at its size (threads too); Direct Selection drags a frame corner or edge (`text.reshapeArea`). Point type still scales. The Selection tool shows the type widget beside selected type's bounding box (hollow on point type, filled on area type); double-clicking it converts between them (Type › Convert To Area Type / Convert To Point Type), keeping the text and its styles in place. Variable fonts list every named instance as a style of their family (Figtree Light to Black and their italics, Bahnschrift, Segoe UI Variable), and the instance chosen is shaped, drawn, outlined and measured at its axis settings; PDF and SVG embed it as that instance. Variation axis sliders are not done. Hebrew and Arabic are laid out right to left with the Unicode bidirectional algorithm (embedded Latin and numbers keep their direction, lines put in visual order after wrapping) in point, area and path type, with caret, selection and arrow keys in visual order; each paragraph's direction comes from its first strong character unless Paragraph Direction sets it (Paragraph panel with Show Indic Options, `text.setFormat {direction}`), and new type aligns to the start of its direction. SVG export outlines right-to-left text. Font Size and Leading are combo boxes in the Character and Properties panels (Font Size in the Control bar too, beside the Character link, font family and style): type, step with ↑/↓ or the spinner, scrub the label, or pick a preset (6–72 pt, shown in the type unit; Leading also Auto), each pick one undo step; Kerning and Tracking list -100…200; a size, leading, kerning or tracking the selected text doesn't share shows blank (#458).
-- **Interface languages, vertical type:** VectorCraft ▸ Language (or Preferences ▸ User Interface) picks Automatic (the system locale) or a registered language, persisted as `interfaceLanguage`. Translations come from per-language catalogs (`i18n/*.tsv`): Traditional and Simplified Chinese, Japanese, Spanish (neutral international Spanish, for every `es-*` locale) and Italian (every `it-*` locale) cover the whole interface, Czech and Brazilian Portuguese every menu label, Brazilian Portuguese the shell's `tl!` literals too (tested); Spanish and Italian also translate status-bar and error messages as they are shown (`@msg` templates, every message literal tested; the messages themselves stay English for agents); untranslated text stays English. Japanese and Chinese glyphs come from the craft-fonts build input (release builds) or the installed fonts, Czech, Spanish and Italian ones from the bundled UI fonts. The web app follows the browser's languages (or `?lang=`). The Basic toolbar's Type button holds Vertical Type in its flyout. Vertical Type, Vertical Area Type and Vertical Type on a Path create vertical text (columns right to left, upright CJK glyphs and marks with `vert` alternates, Latin and longer numbers on their side, two- and three-digit numbers set as tate-chu-yoko in one em of the column (kept whole when justified), upright glyphs centred on the column (tracked or justified too), point type's anchor on the first column's centre line); kinsoku (the strict set) applies to horizontal and vertical Japanese, and justified Japanese lines spread their room between characters (not inside Latin words); Paragraph panel › Mojikumi Set (shown with Preferences › Type › Show East Asian Options, `text.setFormat {mojikumi}`): None or Line-end Punctuation Half Width (new type's default, as in Illustrator; older documents and imported text keep None) shares one half-em space between consecutive punctuation, sets a closing mark ending a line half width and an opening bracket starting a wrapped line flush with its start, and puts a quarter em between Japanese and Latin letters or digits; Paragraph panel menu › Top-to-Top / Bottom-to-Bottom Leading measures leading from em box top to top (area type's first line touches the frame) or from baseline to baseline (new type in a Japanese interface starts top to top, with em box centre character alignment, #432); Paragraph panel menu › Burasagari None / Regular / Force (`text.setFormat {burasagari: "none"|"standard"|"forced"}`) hangs an East Asian comma or full stop (、。，．､｡) ending an area type line outside it, Regular (new type's default) when it doesn't fit and Force always (the rest of the line then fills the measure; closing brackets and Latin punctuation don't hang); Character panel menu › Character Alignment (with the East Asian options; `text.setFormat` or `text.setRangeStyle {charAlign}`) lines characters smaller than the largest on their line up on the Roman baseline or the em box top/right, centre or bottom/left (ICF top and bottom not yet); Type ▸ Type Orientation switches existing text; caret, selection, hit testing and arrow keys follow the writing direction. Vertical text exports to PDF as real text and to SVG as outlines.
+- **Type:** Text Wrap, Type on a Path effects (Rainbow/Skew/3D Ribbon/Stair Step/Gravity) and Options (Flip, Align to Path, Spacing; OK keeps the type where it is), type on a path's start, centre and end brackets (Selection and Direct Selection drag them to set where the type runs, slide it along its path and, across the path, flip it: #429), Character and Paragraph Styles (override-preserving redefine), paragraph attributes per paragraph (alignment, indents, spacing, hyphenation, hanging punctuation, tab stops, paragraph style, direction, mojikumi and leading model; the Paragraph, Tabs and Paragraph Styles panels act on the paragraphs the Type tool's selection or caret touches, Return continues the paragraph's style, threads and SVG keep them), Area Type Options (rows/columns/inset/first baseline, vertical Align Top/Center/Bottom/Justify per row/column, reflowing non-rectangular frames and text wrap), threaded text across any closed shapes, Fit Headline, the Every-line Composer for justified and ragged text (paragraph-wide breaks for an even rag, Single-line per object from the Paragraph panel menu or `text.setFormat {composer}`). Area type resizes like Illustrator's type areas: a bounding-box handle drag (Selection tool) or Area Type Options Width/Height size the frame and the text reflows at its size (threads too); Direct Selection drags a frame corner or edge (`text.reshapeArea`). Point type still scales. Auto Size: the frame height follows the text after every edit, in the same undo step (rectangular frames of horizontal type in one row; columns get the least height that holds them; a height set by hand or threading turns it off), and the "Auto Size New Area Type" preference gives it to new area type. Shrink Text to Fit (beyond Illustrator): overflowing area type scales its sizes, leading and baseline shifts down by the largest factor (in 0.1 pt steps of the first run, down to a minimum percentage) that fits, at layout time so every export sees it. `text.areaOptions` and `document.inspect` report overflow and the shrink factor. The Selection tool shows the type widget beside selected type's bounding box (hollow on point type, filled on area type); double-clicking it converts between them (Type › Convert To Area Type / Convert To Point Type), keeping the text and its styles in place. Variable fonts list every named instance as a style of their family (Figtree Light to Black and their italics, Bahnschrift, Segoe UI Variable), and the instance chosen is shaped, drawn, outlined and measured at its axis settings; PDF and SVG embed it as that instance. Variation axis sliders are not done. Hebrew and Arabic are laid out right to left with the Unicode bidirectional algorithm (embedded Latin and numbers keep their direction, lines put in visual order after wrapping) in point, area and path type, with caret, selection and arrow keys in visual order; each paragraph's direction comes from its first strong character unless Paragraph Direction sets it (Paragraph panel with Show Indic Options, `text.setFormat {direction}`), and new type aligns to the start of its direction. SVG export outlines right-to-left text. Font Size and Leading are combo boxes in the Character and Properties panels (Font Size in the Control bar too, beside the Character link, font family and style): type, step with ↑/↓ or the spinner, scrub the label, or pick a preset (6–72 pt, shown in the type unit; Leading also Auto), each pick one undo step; Kerning and Tracking list -100…200; a size, leading, kerning or tracking the selected text doesn't share shows blank (#458).
+- **Interface languages, vertical type:** VectorCraft ▸ Language (or Preferences ▸ User Interface) picks Automatic (the system locale) or a registered language, persisted as `interfaceLanguage`. Translations come from per-language catalogs (`i18n/*.tsv`): Traditional and Simplified Chinese, Japanese, Spanish (neutral international Spanish, for every `es-*` locale), Italian (every `it-*` locale) and Russian (every `ru-*` locale) cover the whole interface, Czech and Brazilian Portuguese every menu label, Brazilian Portuguese the shell's `tl!` literals too (tested); Spanish, Italian and Russian also translate status-bar and error messages as they are shown (`@msg` templates, every message literal tested; the messages themselves stay English for agents); untranslated text stays English. Japanese and Chinese glyphs come from the craft-fonts build input (release builds) or the installed fonts, Czech, Spanish, Italian and Russian ones from the bundled UI fonts. The web app follows the browser's languages (or `?lang=`). The Basic toolbar's Type button holds Vertical Type in its flyout. Vertical Type, Vertical Area Type and Vertical Type on a Path create vertical text (columns right to left, upright CJK glyphs and marks with `vert` alternates, Latin and longer numbers on their side, two- and three-digit numbers set as tate-chu-yoko in one em of the column (kept whole when justified), upright glyphs centred on the column (tracked or justified too), point type's anchor on the first column's centre line); kinsoku (the strict set) applies to horizontal and vertical Japanese, and justified Japanese lines spread their room between characters (not inside Latin words); Paragraph panel › Mojikumi Set (shown with Preferences › Type › Show East Asian Options, `text.setFormat {mojikumi}`): None or Line-end Punctuation Half Width (new type's default, as in Illustrator; older documents and imported text keep None) shares one half-em space between consecutive punctuation, sets a closing mark ending a line half width and an opening bracket starting a wrapped line flush with its start, and puts a quarter em between Japanese and Latin letters or digits; Paragraph panel menu › Top-to-Top / Bottom-to-Bottom Leading measures leading from em box top to top (area type's first line touches the frame) or from baseline to baseline (new type in a Japanese interface starts top to top, with em box centre character alignment, #432); Paragraph panel menu › Burasagari None / Regular / Force (`text.setFormat {burasagari: "none"|"standard"|"forced"}`) hangs an East Asian comma or full stop (、。，．､｡) ending an area type line outside it, Regular (new type's default) when it doesn't fit and Force always (the rest of the line then fills the measure; closing brackets and Latin punctuation don't hang); Character panel menu › Character Alignment (with the East Asian options; `text.setFormat` or `text.setRangeStyle {charAlign}`) lines characters smaller than the largest on their line up on the Roman baseline or the em box top/right, centre or bottom/left (ICF top and bottom not yet); Type ▸ Type Orientation switches existing text; caret, selection, hit testing and arrow keys follow the writing direction. Vertical text exports to PDF as real text and to SVG as outlines.
 - **Transparency:** opacity masks (clip/invert/disable/link), exported as SVG `<mask>` and PDF soft masks.
-- **Advanced art:** live Blends (steps/distance/smooth colour, editable spine, anchor-targeted Blend tool, faithful interpolation, knockout), Envelope Distort (warp/mesh/top object, Reset, full Envelope Options, mesh handles, Edit Contents; type, images, symbols, gradients, patterns and appearance distorted everywhere), Liquify tools with options and pen pressure, Puppet Warp with rotating pins, Perspective Grid with presets, movable planes and projected type (choosing a perspective tool shows the grid; Hide Grid hides it with the tool still chosen), Gradient Mesh, Shape Builder (stroke-only open paths and lines cut the regions they cross and enclose regions of their own; filled open paths count as closed; erase mode while Alt/Option is held: a minus pointer, red highlights of what will go, a click or drag deletes the regions touched, the pieces of open lines and the edges (outline pieces between the points where paths meet, opening their paths there) it passes over, one undo step, `shapeBuilder.merge {erase}` and `shapeBuilder.regions` edges over MCP), Live Paint (every path an edge, open lines included), Image Trace (12 presets; with an image selected the Control bar and the Properties panel show Image Trace, whose arrow traces with any preset, Mask (`object.maskImage`: a clipping path on the image's outline, selected so its handles crop), Crop Image and Embed or Unembed in place of Fill and Stroke; with an Image Trace object selected, its Preset (choosing another traces again), the Image Trace panel and Expand, plus Release in Properties; the View modes are not done), pattern swatches with pattern editing mode, live Repeat (radial/grid/mirror).
+- **Advanced art:** live Blends (steps/distance/smooth colour, editable spine, anchor-targeted Blend tool, faithful interpolation, knockout), Envelope Distort (warp/mesh/top object, Reset, full Envelope Options, mesh handles, Edit Contents; type, images, symbols, gradients, patterns and appearance distorted everywhere), Liquify tools with options and pen pressure, Puppet Warp with rotating pins, Perspective Grid with presets, movable planes and projected type (choosing a perspective tool shows the grid; Hide Grid hides it with the tool still chosen), Gradient Mesh, Shape Builder (stroke-only open paths and lines cut the regions they cross and enclose regions of their own; filled open paths count as closed; erase mode while Alt/Option is held: a minus pointer, red highlights of what will go, a click or drag deletes the regions touched, the pieces of open lines and the edges (outline pieces between the points where paths meet, opening their paths there) it passes over, one undo step, `shapeBuilder.merge {erase}` and `shapeBuilder.regions` edges over MCP), Live Paint (every path an edge, open lines included), Image Trace (12 presets, colour layers traced in parallel; a trace past two million anchor points or an image over 64 megapixels is refused with advice rather than running out of memory, and a selection too large to outline shows its bounds (#525); Object › Image Trace › Make and Make and Expand trace at once with the Default preset, #543; with an image selected the Control bar and the Properties panel show Image Trace, whose arrow traces with any preset, Mask (`object.maskImage`: a clipping path on the image's outline, selected so its handles crop), Crop Image and Embed or Unembed in place of Fill and Stroke; with an Image Trace object selected, its Preset (choosing another traces again), the Image Trace panel and Expand, plus Release in Properties; the View modes are not done), pattern swatches with pattern editing mode, live Repeat (radial/grid/mirror).
 - **Paint and appearance (M3):**
   - **Swatches:** names follow the colour model and are unique; Swatch Options (process/spot, Global, Gray/RGB/HSB/CMYK/Web, live preview); editing a global or spot swatch recolours every linked fill, stroke and text run in one undo step; multi-select and delete with confirmation; New Swatch and New Color Group dialogs (a group from the selected artwork's colours); swatches in colour groups convert, separate and count like any other. The Swatches panel selects ranges and whole groups, has a find field, and drags swatches to reorder, regroup or paint art; Add Used Colors, Select All Unused, Merge, Ungroup and Sort by Kind; a CMYK document keeps applied colours in CMYK. Swatch libraries: nine generated colour libraries and five gradient libraries in a library panel, saved and loaded as `.vcswatches`, `.gpl` or CSS. Tints of global and spot colours ("Name 40%") stay linked and separate as a percentage of their plate. Spot colours can be defined in Lab (Spot Colors options). A built-in [Registration] swatch prints on every plate.
   - **Colour:** a Color Picker (colour field, H/S/B/R/G/B channel slider, HSB/RGB/Lab/CMYK fields, hex, web-only snapping, out-of-gamut correction); the Color panel follows each colour's own model and Alt-click paints the other proxy; proxies look through groups and show "?" for mixed paint; Invert, Complement, Apply Last Color (`,`) and Apply Last Gradient (`.`) keep the colour model; every paint command feeds the recent colours. The Color Guide has 21 harmony rules, Steps and Variation options and Limit to Library. Adjust Color Balance (its Global mode shifts tints) and Saturate preview live; Edit Colors and Recolor also reach meshes, images and patterns. Recolor Artwork has colour reduction, five recolour methods, presets, Limit to Library, a colour-wheel Edit tab and Edit Color Group; a local Color Themes panel saves five-colour themes. Fill/Stroke chips open swatch and mixer popovers (the Properties panel has the Control bar's Fill and Stroke chips, Stroke link and weight spinner, with nothing selected too), panels have Illustrator's Window menu keys (Align Shift+F7, Transform Shift+F8, Pathfinder Cmd+Shift+F9, Layers F7, Character Cmd+T…; every panel can be given one in Edit › Keyboard Shortcuts), and Eyedropper Options pick up and apply chosen attributes (Alt and Shift+Alt, image pixels). Fills and strokes can overprint (Attributes panel, Overprint Black options), and CMYK documents blend in inks on screen, in PDF and when flattening. Document Color Mode converts the art, symbols, pattern tiles and swatches through the colour settings: Gray stays Gray, RGB greys separate into four-colour greys and a rich black as Illustrator does, or go on the black plate only with `grays: "black"` (also for `document.open {colorMode}`).
@@ -155,8 +158,9 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
 - **Fonts:** a font is found by any of its names (family and style in every language of its name table, legacy family/style pairs, PostScript name), so documents from other apps open with the font they name; Find Font and `text.fonts` say for each font whether it was found exactly, by another name, substituted or missing, and how many glyphs are missing. PDF and `.ai` import brings Japanese text back as live type: CID fonts without a ToUnicode map read through the standard CMaps, vertical columns (WMode 1) as vertical type, letter spacing as tracking; a glyph is live type only when the installed font (in the closest style of its family) draws the same glyph, and text in a font that isn't installed comes in as live type shown in the fallback font until the font is installed (exports that draw it — PDF, EPS, EMF/WMF, raster, SVG outlines or embedded fonts — warn that they wrote the fallback font; `textAs: outlines` keeps the PDF's embedded glyphs).
 - **Files (M4):**
   - `.vectorcraft` (lossless JSON, compressed, atomic saves, save down to v1), Save As with a format chooser, Save a Copy, Revert, templates, Data Recovery after a crash (browser tabs hold their copies with Web Locks too, so a background tab's copies are never taken for a crash's, and a tab repairs copies another removed when it resumes: #367), background save and export. The desktop app writes its warnings and errors (graphics adapter, a lost graphics device, panics the guard recovered from) to standard error and to `logs/vectorcraft.log` next to the preferences, the two previous runs kept and each file capped at 16 MiB, so a launch without a terminal still leaves something to attach to a bug report (#465).
-  - SVG/SVGZ in and out with SVG Options, Preserve Editing, symbols, filters, rich text and physical units (SVG type under a transform or `viewBox` scale opens at the size it draws at, the scale moved into its size, leading, baseline shift and strokes, a stretch, skew or rotation kept as its transform: #396; a top-level group with a clip path, such as a clipped Inkscape layer, opens as a layer with a clipping mask, its name kept: #420); PDF and PDF-compatible `.ai` in and out (layers, with hidden ones kept hidden with their art and nested ones as sublayers, on pages of up to 64 million operators, art whose layer can't be told going to a hidden, non-printing layer rather than showing or printing: #419; strokes kept live, a fill and a stroke of one outline as one object; a type object's stroke written as each glyph's outline stroked back on the type, so it stays one editable object; lines wrapped in a frame (each wrapped line ending in a space, one left edge, leading and font) back as one area type object, left aligned or justified with its paragraph spacing, where laying it out breaks the lines where the file does; glyphs set apart by gaps wider than a space (a barcode's digit groups) keeping their places; layers stacked as the pages mark them even when one first paints on a later page, art ending a layer's marked content or a clip closing in a later layer kept in its own layer, and layers with no art kept empty: #508; masks, editable text with type set along a curve coming back as type on a path, each artboard's art on its own page only, an `.ai`'s white page under its layers left out rather than coming in as art, spot colours, presets, security, marks and bleed, ICC output intents, raster effects, subset fonts, PDF/X, PDF layers, overprint, page thumbnails, fast web view, PDF 1.3). CMYK images keep their ink amounts from PDF import (and from placed CMYK TIFFs) to PDF export: a CMYK JPEG passes through unchanged, others stay CMYK (DeviceCMYK, or ICC-based CMYK in PDF/X-3/X-4) unless the Output settings convert them; the canvas shows them through the working CMYK profile (#320).
+  - SVG/SVGZ in and out with SVG Options, Preserve Editing, symbols, filters, rich text and physical units (SVG type under a transform or `viewBox` scale opens at the size it draws at, the scale moved into its size, leading, baseline shift and strokes, a stretch, skew or rotation kept as its transform: #396; a top-level group with a clip path, such as a clipped Inkscape layer, opens as a layer with a clipping mask, its name kept: #420; hidden objects written hidden on Save and `convert`, and `data-*` attributes kept as the objects' own data: #522); PDF and PDF-compatible `.ai` in and out (layers, with hidden ones kept hidden with their art and nested ones as sublayers, on pages of up to 64 million operators, art whose layer can't be told going to a hidden, non-printing layer rather than showing or printing: #419; strokes kept live, a fill and a stroke of one outline as one object; a type object's stroke written as each glyph's outline stroked back on the type, so it stays one editable object; lines wrapped in a frame (each wrapped line ending in a space, one left edge, leading and font) back as one area type object, left aligned or justified with its paragraph spacing, where laying it out breaks the lines where the file does; glyphs set apart by gaps wider than a space (a barcode's digit groups) keeping their places; layers stacked as the pages mark them even when one first paints on a later page, art ending a layer's marked content or a clip closing in a later layer kept in its own layer, and layers with no art kept empty: #508; masks, editable text with type set along a curve coming back as type on a path, each artboard's art on its own page only, an `.ai`'s white page under its layers left out rather than coming in as art, spot colours, presets, security, marks and bleed, ICC output intents, raster effects, subset fonts, PDF/X, PDF layers, overprint, page thumbnails, fast web view, PDF 1.3). CMYK images keep their ink amounts from PDF import (and from placed CMYK TIFFs) to PDF export: a CMYK JPEG passes through unchanged, others stay CMYK (DeviceCMYK, or ICC-based CMYK in PDF/X-3/X-4) unless the Output settings convert them; the canvas shows them through the working CMYK profile (#320).
   - EPS and DXF in and out, EMF/WMF in and out; PNG (with PNG-8), JPEG, WebP, GIF, TIFF, BMP, Targa and layered PSD export. EPS import runs a PostScript Level 3 interpreter written from the PostScript Language Reference: resource categories and `resourceforall`, local and global VM (`currentglobal`/`setglobal`/`gcheck`), `clipsave`/`cliprestore`, subarrays and substrings that share storage, the standard dictionaries in `systemdict`, `dictstack`, `internaldict`, executable filters and strings, `load` by any key, `//name` immediate names, `token`, `execform`, user paths, `cshow`, `rootfont`, `cachestatus`, colour rendering and halftone queries, file `status` and data read with `flushfile`, and `pdfmark` marks dropped (Discord feedback, #466, #469, #474). Masked images (`ImageType 3` in its three interleavings) and reusable streams are read, and an image's several data sources are read in turn, as the reference defines (procedures that read one file get their own rows: such images came in banded, #498). `restore` puts dictionaries back as they were at the `save`, so programs that count their saves in a dictionary read to their end (part of #505). Tiling patterns come in as pattern swatches, uncoloured ones too; Type 3 fonts' glyphs as their outlines, spaced by `ashow`/`widthshow`/`xshow`/`kshow`; mesh and function-based shadings (types 1, 4–7) as gradient meshes; sampled functions (type 0) and Flate/LZW predictors are read. It is tested with programs written from the specification in the ways common generators use these features; Inkscape/cairo EPS files open as vectors. When a file's PostScript still can't be read, it opens as its TIFF preview, its Windows metafile preview (as vectors) or its EPSI preview, and the warning (in the status bar, `document.open`/`app.open`/MCP `open_file` replies and `vectorcraft-cli info`) names the error, the operator that raised it and the procedures it ran in. Legacy PostScript `.ai` files (Illustrator 3–8, written with the prolog that defines their operators) keep their groups and nested groups (`u` … `U`), between and inside clipping groups; EPS and EMF/WMF import nest clips (and groups) at most 128 deep, so a hostile file can't exhaust the stack. DXF TEXT justified Fit or Aligned spans its two points (stretched, or scaled as a whole).
+  - Placed documents: File › Place of a `.vectorcraft` file links to it by default (`file.place`'s `link`): one locked object showing an artboard of the document (or its art's bounds), read the way placing it without Link reads it, its symbols, patterns and images kept apart from the document's; without Link (or from bytes, not a file) it is an editable copy as before. It stays vectors in every output (SVG, PDF, EPS, EMF, DXF), and so do placed documents inside it, read from their own files up to 8 levels deep (documents that place each other stop there). On screen they draw from bitmaps cached per file and zoom step, shared by every copy and made in the background (a placeholder until ready), so a sheet of them redraws in about a millisecond; exports and prints draw them exactly. Like linked images, a save keeps only a preview of each (JPEG when opaque) unless Include Linked Files; output, and zooming past the preview, read the file again, falling back to the preview with a warning when it is gone or changed. Saves for older versions write them as plain art. Links check, update, relink, Update Links on open, Link Info (the artboard's size), Placement Options, Break Link (also Embed, Object › Expand: the editable copy placing without Link gives, its resources joining the document), Edit Original (the document in a new tab) and the Links panel cover them; saving a document updates the open documents that place it. The native format (v4) keeps data of 8 KB or more after the JSON instead of base64 in it.
   - Place and the Links panel, Package, File Info, Print with print presets, PostScript output and print tiling, slices and Save for Web, Export for Screens and Asset Export, CSS Properties, PNG/PDF/SVG/text clipboard flavours; files copied in a file manager paste as art (SVG, PDF, EMF/WMF, bitmaps) on every desktop platform, and Linux/Wayland reads the compositor's clipboard (#398); on Linux the Paste menu checks the clipboard off the UI thread, so an X11 owner that never answers can't freeze the window (#510); screenshots and other copied pictures paste as embedded images at the view centre everywhere, the web included (#457).
 - **Performance:** 20k shapes + 1k texts render in 27 ms per full-retina frame (7.8 ms zoomed), 7× faster than the first version. The UI thread never blocks. The web build is 7.1 MB gzipped.
 - **Graphics processor:** the canvas is rasterized on the CPU and the GPU only composites it, so any GPU that can show the window will do. Preferences › Performance › Graphics Processor (`gpuPreference`) is Automatic by default: the power-saving GPU on Windows and macOS (the integrated one on hybrid-graphics laptops, where presenting from the discrete GPU made the window flicker, #306), and the GPU the desktop runs on under Linux, where KWin on an NVIDIA GPU refused frames from a Ryzen's integrated GPU and 0.5.0 crashed at startup (#502). Power Saving and High Performance pick a kind of GPU; `WGPU_POWER_PREF`, `WGPU_ADAPTER_NAME` and `WGPU_BACKEND` override them. The app picks among the adapters that can present to the window (native backends before OpenGL, hardware before software, and on Windows a GPU's DX12 adapter before its Vulkan one: Intel's Vulkan driver made the whole window flicker black, #545), and if the window fails on one while starting up it starts again without it instead of crashing; Help › About, `ui.inspect` and the log name the adapter in use. When the browser drops the page's WebGPU device or WebGL context, the web build writes recovery copies, starts again on new graphics with the same app and uploads its textures again; if it can't, it removes the stale canvas and says to reload, which offers the copies back. The desktop app writes the copies and says to restart (#369). On Windows and Linux the tools' cursors are OS cursors (bitmaps rasterized once per display scale), which the system moves itself: painted into the window, they trailed the pointer by the frames waiting to be shown, and the window now queues one frame instead of two (#444). macOS and the web still paint them (macOS sizes cursor bitmaps in points, eframe has no bitmap cursors on the web). Pens and touch drive the tools as the mouse does, and a tap pressed and lifted within one frame clicks where it tapped (#491); pen pressure reaches the Liquify tools' Use Pressure Pen on Windows, while winit 0.30 reports none on macOS or Linux and egui none on the web. On Linux, see `docs/development.md` for pens under Wayland.
@@ -168,19 +172,19 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
 |---|---|---|---|
 | M0 | Skeleton + vertical slice | ✅ done | — |
 | M1 | Selection, transform, layers, MCP | ✅ mostly done (transform reference point snaps to anchors/centres; rotated objects keep a rotated bounding box and their angle; Free Transform, Scale and Reflect along a rotated box pending) | 4–6 |
-| M2 | Drawing tools + smart guides | ✅ mostly done (Flare, Reshape, Live Corners widget dragging and per-corner radii and kinds landed, on any path's corners; Shaper, the remaining Pen modifier nuances) | 15–20 |
+| M2 | Drawing tools + smart guides | ✅ mostly done (Flare, Reshape, Live Corners widget dragging and per-corner radii and kinds landed, on any path's corners; Shaper rough-shape recognition and orientation steps, the remaining Pen modifier nuances; Shaper Groups with editable sources and separate fill/stroke edits landed; construction widget/refinements pending) | 12–18 |
 | M3 | Paint & appearance (swatches, color, gradient, stroke, appearance, transparency, styles) | ✅ done (M3.7–M3.98): swatches, groups, libraries, tints, Lab spots and Registration; Color Picker, Color panel, Color Guide, Color Themes, Edit Colors and Recolor Artwork; gradients that follow every transform, the annotator, linked stops, freeform gradients, focal points, gradients on strokes and Expand; stroke geometry, arrowheads, dashes fitted to corners, stroke on type, width profiles and the Width tool, Scale Strokes and preview bounds; Appearance targeting, container appearance, target circles, Expand Appearance; knockout, isolation, blend accuracy, CMYK blending, overprint, Attributes, masks and clipping, Flatten Transparency; graphic styles, links and libraries. Left: freeform and mixed spot/process gradients export as stops or process colours to SVG/PDF; confirm the Scale Strokes & Effects default | 4–8 |
 | M4 | Files (native, SVG, PDF, raster, Export for Screens, clipboard interop) | ✅ done (M4.14–M4.98 on 2026-10-05): Save As/Save a Copy/Revert/templates, Data Recovery and background save, SVG import and export fidelity (units, text, symbols, filters, SVGZ, Preserve Editing, SVG Options), PDF import (colours, layers, masks, editable text, security) and export (presets, marks, bleed, ICC and output intent, raster effects, subset fonts, PDF/X-1a, X-3 and X-4, PDF layers, overprint, page thumbnails, fast web view, PDF 1.3), Place and Links, Package, EPS and DXF in and out, EMF/WMF, TIFF/BMP/Targa/PSD/GIF/PNG-8 export, Print and print presets, slices, Save for Web, Asset Export, clipboard flavours, File Info. Left: DWG (use DXF), PSD placement as layers, overprint read back from PDF, polish | 3–6 |
 | M5 | Performance | 🟡 background render + caches + MT done; `vectorcraft-cli bench` and `vectorcraft-cli perf` (budget suite); file format v2 opens 3× faster (50k paths: 722 → 244 ms); raster effects (glows, shadows, blur, feather) no longer force the whole frame single-threaded (filtered offscreen per effect, verified equal to the single-threaded reference); effect-heavy demos need a clean-machine benchmark; dirty-region rendering, GPU backend spike pending | 15–25 |
 | M6 | Path operations (Pathfinder, Shape Builder, offset…) | ✅ mostly done (Boolean precision on almost-horizontal edges fixed and the property tests made deterministic; Shape Builder gap detection, large-offset bug open) | 3–6 |
-| M7 | Type (point/area/path, editing, styles, OpenType, threading, glyphs) | 🟡 Character/Paragraph Styles, Area Type Options (with Width/Height), type areas resized by their handles and reshaped with Direct Selection, threaded text, Fit Headline, Glyphs, OpenType panel, Find Font, installed system fonts in every font menu (fonts registered with Windows outside its font folders, the XDG and Flatpak host font folders on Linux, and fonts installed while the app runs, listed when it comes back to the front; searchable; the Character and Properties menus show each family's sample of the selected text, preview it live under the pointer or ↑/↓, filter by script and kind, list a family's styles, and star favourites; the Glyphs panel and Find Font's Replace With use the same menu without the live preview) and found by name on open/import, variable fonts' named instances as styles, CJK names in the UI, input methods (marked text in place, candidate window at the caret; Japanese IME), Text Wrap (offset, invert, both sides of an object; follows edits), Type on a Path effects and Options with draggable start/centre/end brackets (slide, flip), tab stops + Tabs panel, Hebrew/Arabic bidirectional text and Paragraph Direction done; tab leaders, spell check, vertical type pending | 45–60 |
+| M7 | Type (point/area/path, editing, styles, OpenType, threading, glyphs) | 🟡 Character/Paragraph Styles, per-paragraph paragraph attributes, Area Type Options (with Width/Height, Auto Size and Shrink Text to Fit; overflow reported to agents and vertical Align), type areas resized by their handles and reshaped with Direct Selection, threaded text, Fit Headline, Glyphs, OpenType panel, Find Font, installed system fonts in every font menu (fonts registered with Windows outside its font folders, the XDG and Flatpak host font folders on Linux, and fonts installed while the app runs, listed when it comes back to the front; searchable; the Character and Properties menus show each family's sample of the selected text, preview it live under the pointer or ↑/↓, filter by script and kind, list a family's styles, and star favourites; the Glyphs panel and Find Font's Replace With use the same menu without the live preview) and found by name on open/import, variable fonts' named instances as styles, CJK names in the UI, input methods (marked text in place, candidate window at the caret; Japanese IME), Text Wrap (offset, invert, both sides of an object; follows edits), Type on a Path effects and Options with draggable start/centre/end brackets (slide, flip), tab stops + Tabs panel, Hebrew/Arabic bidirectional text, Paragraph Direction, Every-line/Single-line Composer per object (ragged text too) done; tab leaders, spell check, vertical type pending | 45–60 |
 | M8 | Transform & distort (Puppet Warp, Liquify tools, Envelopes, Blends, Perspective Grid) | ✅ done (M8.1–M8.20 on 2026-10-06, fidelity pass): Liquify Tool Options with one shared brush, pen pressure, hold-to-apply, a safe scope and incremental strokes; tool options that last; Puppet Warp rotation, multi-select, Control bar and a rest-shape session that follows Undo; Width tool on compound paths; Envelope dialogs with preview, Reset with Warp/Mesh, full Envelope Options, type/images/symbols/appearance/gradients/patterns distorted on canvas and in every export, warps that keep their frame, Edit Contents, mesh handles and Control bar; Blend Options, anchor-targeted Blend tool, editable spine, keys picked on the canvas, faithful interpolation and knockout; Perspective Grid with Define Grid, presets, lock/snap/rulers, widgets, the 1–4 plane switch, movable planes, Perspective Selection scale/copy/perpendicular/Transform Again, and type and symbols truly projected with Edit Text. Left: Anti-Alias and Preserve Shape output, warp-envelope point editing, brush interpolation in blends, Free Transform/Scale/Reflect along a rotated box | 2–4 |
 | M9 | Live effects (+ 3D & Materials) | 🟡 2D effects done incl. Effect → Pathfinder and Color Adjustments; SVG Filters, Document Raster Effects Settings, 3D pending | 86–135 |
 | M10 | Brushes, symbols, patterns, Repeat | 🟡 pattern swatches (5 tile types, Pattern Options, editing mode, SVG `<pattern>`/PDF export) and live Repeat (radial/grid/mirror) done; brushes/symbols in progress | 23–37 |
 | M11 | Artboards & views (artboard panel/tool, Trim View, middle-button pan, print tiling and the status bar's artboard navigator done; multiple windows, presentation polish) | 🟡 | 15–25 |
 | M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (12 presets, 18 ms/1k² image), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, regenerate in place) done; graph Design/Column/Marker designs pending | 6–10 |
 | M13 | Automation (Actions ✅ record/playback, persisted; variables, scripting, batch) | 🟡 | 18–27 |
-| M14 | 1.0 polish (preferences, shortcut editor, workspaces, accessibility, packaging for all OSes) | 🟡 Preferences, shortcut editor (chords with Shift and a punctuation key fire as typed), workspaces, a custom title bar on Windows/Linux with a Home button, content-sized dialogs and menus that scroll when longer than the window done; an experimental, unsupported Windows 7 x64 portable OpenGL build (not verified by maintainers); accessibility and broader Windows/Linux packaging/QA pending | 18–28 |
+| M14 | 1.0 polish (preferences, shortcut editor, workspaces, accessibility, packaging for all OSes) | 🟡 Preferences, shortcut editor (chords with Shift and a punctuation key fire as typed), workspaces, a custom title bar on Windows/Linux with a Home button, content-sized dialogs, menus that scroll when longer than the window and macOS native menu dismissal done (M14.8); an experimental, unsupported Windows 7 x64 portable OpenGL build (not verified by maintainers); accessibility and broader Windows/Linux packaging/QA pending | 18–28 |
 | — | Interaction fidelity pass (every tool's modifiers, Properties panel per context, isolation, nuance) | ⬜ | 60–90 |
 | — | Hardening at scale (big-file corpus, fuzzing, cross-platform + browser QA) | 🟡 | 50–80 |
 | | **Total to full parity** (one agent; re-derived from the [Parity estimate](#parity-estimate) table) | | **~320–500** |
@@ -200,7 +204,7 @@ about 1–1.5 agent-hours each, so the other rows (estimated on the older scale)
 | Area | Weight | Done | Missing (main items) | One agent (h) |
 |---|---:|---:|---|---:|
 | Selection, transform & align tools | 6 | 85% | Free Transform/Scale/Reflect along a rotated box, Start Global Edit, transform nuances (the rotated persistent bounding box is done) | 4–6 |
-| Drawing tools | 7 | 85% | Shaper Groups (merge/punch overlapping shapes), pencil and the remaining pen modifier nuances, the freehand Tool Options' Keep selected, Alt to the Smooth tool, Blob Brush Merge Only with Selection and brush angle/roundness, Touch Type, Live Corners on corners between curved sides (and Relative rounding) | 10–15 |
+| Drawing tools | 7 | 85% | rough-square Shaper recognition and orientation steps corrected; editable Shaper Groups landed; remaining: Shaper construction widget/gesture refinements, pencil and the remaining pen modifier nuances, the freehand Tool Options' Keep selected, Alt to the Smooth tool, Blob Brush Merge Only with Selection and brush angle/roundness, Touch Type, Live Corners on corners between curved sides (and Relative rounding) | 8–13 |
 | Path operations, Pathfinder, Shape Builder, Live Paint | 5 | 86% | Live Paint gap options, Shape Builder gap detection, options (Tool Options dialog, clicking a stroke in merge mode) and Shift-drag marquee | 3–6 |
 | Colour, swatches, gradients, patterns, mesh, recolor | 7 | 96% | freeform and mixed spot/process gradients in SVG/PDF (exported as stops or process colours), pattern fills in Expand | 2–4 |
 | Strokes, brushes, width profiles | 5 | 88% | brush options depth, brush libraries (generated in code), brushes driven by pen tilt, bearing and barrel rotation (6D art pens) | 12–20 |
@@ -208,7 +212,7 @@ about 1–1.5 agent-hours each, so the other rows (estimated on the older scale)
 | Live vector effects | 5 | 85% | Outline Object, Pathfinder Hard/Soft Mix and Trap, SVG Filters | 6–10 |
 | Raster effects (Effect Gallery, Document Raster Effects Settings) | 4 | 20% | ~55 Photoshop-style filters (Artistic, Brush Strokes, Distort, Pixelate, Sketch, Stylize, Texture, Video) and the Effect Gallery; Document Raster Effects Settings and raster effects in PDF are done | 28–42 |
 | 3D and Materials | 4 | 0% | Extrude & Bevel, Revolve, Inflate, Rotate, lighting, materials (software renderer) | 50–80 |
-| Type core | 9 | 79% | Middle Eastern features beyond bidi layout and Paragraph Direction (Character Direction, digit types, kashidas, the Middle Eastern composers, editable bidirectional SVG text, a split caret where directions meet); composer/hyphenation options, Optical Margin Alignment, hidden characters, Transform Again after a type-area resize (it scales the type), partial selection of type-area anchors by marquee | 15–20 |
+| Type core | 9 | 80% | Middle Eastern features beyond bidi layout and Paragraph Direction (Character Direction, digit types, kashidas, the Middle Eastern composers, editable bidirectional SVG text, a split caret where directions meet); Hyphenation… and Justification… options (Every-line Composer for justified and ragged text, per object, is done; it is tuned by eye, not yet compared side by side with Illustrator; mixed type sizes in a paragraph still break single-line), Optical Margin Alignment, paragraph spacing limit for vertically justified area type, hidden characters, paragraph attributes in the Type tool's copy and paste (the characters keep their styles, the paragraphs take the destination's), mixed-value display in the Paragraph panel for a selection across differing paragraphs, Transform Again after a type-area resize (it scales the type), partial selection of type-area anchors by marquee | 14–19 |
 | Type advanced | 4 | 50% | CJK composition for vertical type (ruby, mojikumi beyond Line-end Punctuation Half Width — the other sets (and their paragraph-start bracket and indent rules), kinsoku sets and the Mojikumi Settings dialog —, proportional vertical metrics, manual tate-chu-yoko, Character Alignment on the ICF top and bottom), variable font axis sliders (named instances are styles), tab leaders, spell check (open dictionary), Touch Type, Retype; vertical point/area/path type and Type Orientation have initial support | 20–28 |
 | Symbols, blends, envelopes, Repeat, perspective | 5 | 88% | symbol libraries (original), dynamic symbols, envelope Anti-Alias/Preserve Shape output and warp point editing, brush interpolation in blends (M8 fidelity pass done) | 5–8 |
 | Image Trace, graphs, image tools | 3 | 70% | graph Design/Column/Marker, Create Object Mosaic, Crop Image polish (an on-canvas crop box), Image Trace View modes (Outlines, Source Image) (Vector Halftone is done) | 6–10 |
@@ -219,8 +223,8 @@ about 1–1.5 agent-hours each, so the other rows (estimated on the older scale)
 | Export for Screens, Asset Export, slices, Save for Web | 3 | 85% | polish only (all four are done) | 2–4 |
 | Print, colour management, separations, flattener | 3 | 80% | print preview fidelity (flattener presets in PDF and print, overprint in PDF and composite print, Print dialog, presets, PostScript, marks, separations, Print Tiling, print overprint/flattener/bitmap options and printer profile are done) | 1–2 |
 | Automation | 3 | 60% | Variables (data merge), scripting surface, batch | 8–12 |
-| UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 78% | Variables, SVG Interactivity, Properties per context, Consolidate All Windows, floating panels outside the app window and docked into any group, context menus beyond the canvas (Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done), about 30 Preferences options stored but not yet acted on (#394: Spacing Guides, Auto Size New Area Type, Show Font Names in English, Highlight Alternate Glyphs, performance, devices…) | 14–22 |
-| Libraries, Links, Package | 2 | 50% | a local Libraries panel (no cloud by design); Links and Package are done | 5–8 |
+| UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 78% | macOS native menu dismissal fixed (M14.8); remaining: Variables, SVG Interactivity, Properties per context, Consolidate All Windows, floating panels outside the app window and docked into any group, context menus beyond the canvas (Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done), about 30 Preferences options stored but not yet acted on (#394: Spacing Guides, Auto Size New Area Type, Show Font Names in English, Highlight Alternate Glyphs, performance, devices…) | 14–22 |
+| Libraries, Links, Package | 2 | 50% | a local Libraries panel (no cloud by design); Links and Package are done; placed VectorCraft documents are done (linked by default, vectors in every output, previews, Break Link, Expand, Edit Original, refresh on save) | 5–8 |
 | **Feature parity** | **103** | **~75%** | | **~210–330** |
 | Interaction-fidelity pass (side by side with Illustrator: every tool modifier, cursor, dialog, Properties context) | | | | 60–90 |
 | Hardening (big-file corpus, fuzzing, cross-platform and browser QA, accessibility, packaging) | | | | 50–80 |

apps/vectorcraft-cli/Cargo.toml

@@ -22,7 +22,14 @@ vectorcraft-geom = { workspace = true }
 vectorcraft-svg = { workspace = true }
 vectorcraft-mcp = { workspace = true }
 vectorcraft-render = { workspace = true }
+vectorcraft-text = { workspace = true }
 serde_json = { workspace = true }
+log = { workspace = true }
+
+# DirectWrite's system font collection (the desktop app's src/system_fonts.rs, shared): fonts that
+# font services such as Adobe Fonts load in place (#579). MIT OR Apache-2.0.
+[target.'cfg(all(windows, not(target_vendor = "win7")))'.dependencies]
+windows = { version = "0.62", features = ["Win32_Graphics_DirectWrite"] }
 
 [dev-dependencies]
 vectorcraft-testkit = { workspace = true }

apps/vectorcraft-cli/src/main.rs

@@ -9,7 +9,9 @@
 //! vectorcraft-cli bench FILE [--size 2880x1800] [--iters 5]
 //! vectorcraft-cli perf [--paths 50000]
 //! ```
-#![forbid(unsafe_code)]
+// Denied, not forbidden: the DirectWrite font lister shared with the desktop app (Windows) allows
+// it for its COM calls, and nothing else may.
+#![deny(unsafe_code)]
 
 use std::io::Write;
 use std::process::ExitCode;
@@ -35,6 +37,10 @@ macro_rules! out {
 }
 
 mod perf;
+/// The desktop app's DirectWrite font lister, shared: exports and MCP find the same fonts.
+#[cfg(all(windows, not(target_vendor = "win7")))]
+#[path = "../../vectorcraft/src/system_fonts.rs"]
+mod system_fonts;
 
 use serde_json::{Value, json};
 use vectorcraft_mcp::{Backend, DEFAULT_ADDR, Headless, Remote, Server};
@@ -69,7 +75,8 @@ USAGE:
       Open IN (any readable format) and export OUT in the format its extension picks (see Writable
       formats). --artboard is 0-based, --range 1-based (\"1-3,5\"); a PDF gets every artboard
       unless one of them is given, EPS the bounds of the art, the other formats the first artboard.
-      Live effects are kept; --outline-text writes SVG text as paths.
+      Live effects are kept, and hidden layers and objects (written hidden in SVG and PSD), with
+      SVG's data-* attributes; --outline-text writes SVG text as paths.
 
   vectorcraft-cli info FILE
       Print a JSON summary: the import warnings (what didn't come in as it was, such as an EPS
@@ -92,6 +99,9 @@ fn usage() -> String {
 }
 
 fn main() -> ExitCode {
+    // Before any font lookup: the fonts font services load (#579).
+    #[cfg(all(windows, not(target_vendor = "win7")))]
+    system_fonts::install();
     let args: Vec<String> = std::env::args().skip(1).collect();
     let r = match args.first().map(String::as_str) {
         Some("mcp") => mcp(&args[1..]),
@@ -177,12 +187,10 @@ fn convert(args: &[String]) -> Result<(), String> {
     let [input, output] = <[String; 2]>::try_from(files).map_err(|_| "convert needs IN and OUT")?;
     let mut h = Headless::new();
     h.call("app.open", json!({"path": input})).map_err(|e| format!("open {input}: {e}"))?;
-    let r = h
-        .call(
-            "engine.execute",
-            json!({"command": "document.export", "params": {"path": output, "scale": scale, "artboard": artboard, "range": range, "outlineText": outline_text}}),
-        )
-        .map_err(|e| format!("export {output}: {e}"))?;
+    // A conversion keeps hidden layers and objects, written hidden, where the format can (SVG,
+    // PSD).
+    let params = json!({"path": output, "scale": scale, "artboard": artboard, "range": range, "outlineText": outline_text, "hiddenLayers": true});
+    let r = h.call("engine.execute", json!({"command": "document.export", "params": params})).map_err(|e| format!("export {output}: {e}"))?;
     outln!("{r}");
     Ok(())
 }

apps/vectorcraft-web/src/web.rs

@@ -6,7 +6,7 @@ use std::rc::Rc;
 use std::sync::{Arc, Mutex};
 
 use vectorcraft_engine::Session;
-use vectorcraft_engine::cmd::clipboard::{FILE_HEAD, Flavour, PASTE_ORDER, file_flavour};
+use vectorcraft_engine::cmd::clipboard::{FILE_HEAD, Flavour, PASTE_ORDER, file_flavour, is_address};
 use vectorcraft_engine::cmd::fileio;
 use vectorcraft_engine::cmd::recovery::{self, Hold, RecoveryStore};
 use vectorcraft_ui_egui::graphics::GraphicsLoss;
@@ -200,7 +200,8 @@ fn track_paste(pasted: &Rc<RefCell<Pasted>>) {
     let on_paste = wasm_bindgen::closure::Closure::<dyn FnMut(web_sys::ClipboardEvent)>::new(move |e: web_sys::ClipboardEvent| {
         let Some(data) = e.clipboard_data() else { return };
         let Some(files) = data.files().filter(|f| f.length() > 0) else { return };
-        if data.get_data("text").is_ok_and(|t| !t.is_empty()) {
+        // Text is egui's, but for the address a browser's Copy Image puts next to the picture.
+        if data.get_data("text").is_ok_and(|t| !t.is_empty() && !is_address(&t)) {
             return;
         }
         e.prevent_default();

apps/vectorcraft/Cargo.toml

@@ -19,6 +19,7 @@ windows7 = ["eframe/glow"]
 [dependencies]
 vectorcraft-engine = { workspace = true }
 vectorcraft-ui-egui = { workspace = true }
+vectorcraft-text = { workspace = true }
 eframe = { workspace = true, features = ["default_fonts", "wayland", "x11"] }
 egui = { workspace = true }
 serde_json = { workspace = true }
@@ -36,12 +37,17 @@ winit = { version = "0.30", default-features = false }
 [target.'cfg(windows)'.dependencies]
 clipboard-win = { workspace = true }
 
+# DirectWrite's system font collection (src/system_fonts.rs): fonts that font services such as
+# Adobe Fonts load in place (#579). MIT OR Apache-2.0, already in the build through accesskit.
+[target.'cfg(all(windows, not(target_vendor = "win7")))'.dependencies]
+windows = { version = "0.62", features = ["Win32_Graphics_DirectWrite"] }
+
 [target.'cfg(target_os = "macos")'.dependencies]
 # The macOS menu bar (src/mac_menu.rs): Tauri's menu crate, AppKit menus behind a safe API (no GTK
 # with default features off). Pinned exactly: review the diff before bumping.
 muda = { version = "=0.21.1", default-features = false }
 objc2 = "0.6"
-objc2-app-kit = { version = "0.3", default-features = false, features = ["std", "NSApplication", "NSEvent", "NSPasteboard", "NSResponder", "NSTextInputContext"] }
+objc2-app-kit = { version = "0.3", default-features = false, features = ["std", "NSApplication", "NSMenu", "NSEvent", "NSPasteboard", "NSResponder", "NSTextInputContext"] }
 # Files opened from Finder and the Dock (src/open_documents.rs) and pasted bitmaps (src/clipboard.rs); both already come with winit, muda and rfd.
 objc2-foundation = { version = "0.3", default-features = false, features = ["std", "block2", "NSArray", "NSData", "NSNotification", "NSOperation", "NSString", "NSURL"] }
 block2 = "0.6"

apps/vectorcraft/src/mac_menu.rs

@@ -12,16 +12,83 @@
 //! - Hide and Hide Others are items of ours calling `NSApplication`: AppKit's own always take ⌘H
 //!   (View › Hide Edges) and ⌥⌘H.
 
+use std::sync::Once;
+use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::{Receiver, channel};
 
+use block2::RcBlock;
+
 use egui::{Key, KeyboardShortcut};
 use muda::accelerator::{Accelerator, Code, Modifiers};
 use muda::{CheckMenuItem, Menu, MenuEvent, MenuItem, PredefinedMenuItem, Submenu};
 use objc2::MainThreadMarker;
-use objc2_app_kit::{NSApplication, NSEventModifierFlags, NSEventType};
+use objc2_app_kit::{NSApplication, NSEventModifierFlags, NSEventType, NSMenuDidBeginTrackingNotification, NSMenuDidEndTrackingNotification};
+use objc2_foundation::{NSNotification, NSNotificationCenter};
 use vectorcraft_ui_egui::VectorcraftApp;
 use vectorcraft_ui_egui::native_menu::{self, Backend, Event, MenuBar, MenuRole, Node, Standard};
 
+// AppKit can deliver window input while its system menu is still tracking (especially with
+// asynchronous menu presentation). Keep the native tracking state separate from egui popups.
+static TRACKING: AtomicBool = AtomicBool::new(false);
+
+fn observe_tracking(ctx: &egui::Context) {
+    static INSTALL: Once = Once::new();
+    INSTALL.call_once(|| {
+        // SAFETY: AppKit initializes these immutable notification-name constants.
+        #[allow(unsafe_code)]
+        let notifications = unsafe { [(NSMenuDidBeginTrackingNotification, true), (NSMenuDidEndTrackingNotification, false)] };
+        for (name, tracking) in notifications {
+            let repaint = ctx.clone();
+            let block = RcBlock::new(move |_: std::ptr::NonNull<NSNotification>| {
+                TRACKING.store(tracking, Ordering::Relaxed);
+                // Apply any deferred menu updates as soon as the tracking session ends.
+                if !tracking {
+                    repaint.request_repaint();
+                }
+            });
+            // SAFETY: these are AppKit's notification names. The notification center retains
+            // the observer and block for the application's lifetime; callbacks update an atomic and request repaint.
+            #[allow(unsafe_code)]
+            unsafe {
+                NSNotificationCenter::defaultCenter().addObserverForName_object_queue_usingBlock(Some(name), None, None, &block);
+            }
+        }
+    });
+}
+
+fn cancel_tracking() {
+    if let Some(mtm) = MainThreadMarker::new()
+        && let Some(menu) = NSApplication::sharedApplication(mtm).mainMenu()
+    {
+        menu.cancelTracking();
+    }
+    TRACKING.store(false, Ordering::Relaxed);
+}
+
+/// A dismissing click belongs to the menu, so the canvas and panel controls must not see it.
+fn dismiss_input(raw: &mut egui::RawInput, tracking: bool) -> bool {
+    if !raw
+        .events
+        .iter()
+        .any(|e| matches!(e, egui::Event::PointerButton { pressed: true, .. } | egui::Event::Key { key: egui::Key::Escape, pressed: true, .. }))
+    {
+        return false;
+    }
+    if tracking {
+        raw.events.retain(|e| !matches!(e, egui::Event::PointerButton { .. } | egui::Event::Key { key: egui::Key::Escape, .. }));
+    }
+    true
+}
+
+/// Inspect real window input before native key equivalents and control events are added.
+pub fn raw_input_hook(raw: &mut egui::RawInput) {
+    // Asynchronous menu presentation may leave a displayed menu after its tracking notification.
+    // Still cancel it, but consume the dismissing input only during a reported tracking session.
+    if dismiss_input(raw, TRACKING.load(Ordering::Relaxed)) {
+        cancel_tracking();
+    }
+}
+
 enum Handle {
     Plain(MenuItem),
     Check(CheckMenuItem),
@@ -48,10 +115,13 @@ pub struct MacMenu {
     entries: Vec<Entry>,
     rx: Receiver<Chosen>,
     structure: u64,
+    /// Latest menu state to apply after AppKit finishes tracking; item ids stay stable meanwhile.
+    pending: Option<MenuBar>,
 }
 
 impl MacMenu {
     fn new(ctx: &egui::Context) -> MacMenu {
+        observe_tracking(ctx);
         let (tx, rx) = channel();
         let repaint = ctx.clone();
         MenuEvent::set_event_handler(Some(move |e: MenuEvent| {
@@ -67,7 +137,7 @@ impl MacMenu {
             // Wake egui, so the item runs now rather than on the next mouse move.
             repaint.request_repaint();
         }));
-        MacMenu { menu: None, entries: Vec::new(), rx, structure: 0 }
+        MacMenu { menu: None, entries: Vec::new(), rx, structure: 0, pending: None }
     }
 
     /// Build the menus of `bar` and make them the app's, in place of the ones before.
@@ -146,6 +216,13 @@ fn append(sub: &Submenu, nodes: &[Node], entries: &mut Vec<Entry>) -> muda::Resu
 
 impl Backend for MacMenu {
     fn sync(&mut self, bar: &MenuBar) {
+        // Replacing or mutating an NSMenu during tracking can strand its displayed menu. Keep
+        // the latest state: the shared model considers this sync complete and may not resend it.
+        if TRACKING.load(Ordering::Relaxed) {
+            self.pending = Some(bar.clone());
+            return;
+        }
+        self.pending = None;
         let items = bar.items();
         if self.menu.is_none() || native_menu::structure_key(bar) != self.structure || items.len() != self.entries.len() {
             if let Err(e) = self.build(bar) {
@@ -183,6 +260,7 @@ impl Backend for MacMenu {
     fn drain(&mut self) -> Vec<Event> {
         let mut out = Vec::new();
         while let Ok(chosen) = self.rx.try_recv() {
+            cancel_tracking();
             // Ids that aren't ours are AppKit's own items (Services, Zoom…), already handled.
             let Some(e) = chosen.id.strip_prefix("vc").and_then(|n| n.parse::<usize>().ok()).and_then(|i| self.entries.get(i)) else { continue };
             if let Some(command @ (native_menu::HIDE | native_menu::HIDE_OTHERS)) = e.item.command {
@@ -207,6 +285,12 @@ impl Backend for MacMenu {
                 None => Event::Click(e.item.clone()),
             });
         }
+        // Drain against the old item ids before a deferred structure change replaces them.
+        if !TRACKING.load(Ordering::Relaxed)
+            && let Some(bar) = self.pending.take()
+        {
+            self.sync(&bar);
+        }
         out
     }
 }
@@ -364,4 +448,40 @@ mod tests {
         assert_ne!(parse("Cmd+M"), parse("Ctrl+Cmd+M"));
         assert!(parse("Cmd+M").is_some());
     }
+
+    fn press() -> egui::Event {
+        egui::Event::PointerButton {
+            pos: egui::pos2(300.0, 200.0),
+            button: egui::PointerButton::Primary,
+            pressed: true,
+            modifiers: Default::default(),
+        }
+    }
+
+    #[test]
+    fn outside_press_dismisses_without_starting_a_canvas_gesture() {
+        let moved = egui::Event::PointerMoved(egui::pos2(300.0, 200.0));
+        let mut raw = egui::RawInput { events: vec![moved.clone(), press()], ..Default::default() };
+        assert!(dismiss_input(&mut raw, true));
+        assert_eq!(raw.events, [moved]);
+        assert!(!dismiss_input(&mut raw, true));
+        raw.events.push(press());
+        assert!(dismiss_input(&mut raw, false));
+        assert_eq!(raw.events.len(), 2, "ordinary canvas presses still reach egui");
+    }
+
+    #[test]
+    fn escape_dismisses_without_reaching_the_active_tool() {
+        let escape = |pressed| egui::Event::Key { key: egui::Key::Escape, physical_key: None, pressed, repeat: false, modifiers: Default::default() };
+        let mut raw = egui::RawInput { events: vec![escape(true), escape(false)], ..Default::default() };
+        assert!(dismiss_input(&mut raw, true));
+        assert!(raw.events.is_empty());
+    }
+
+    #[test]
+    fn moving_the_pointer_does_not_dismiss_a_tracking_menu() {
+        let mut raw = egui::RawInput { events: vec![egui::Event::PointerMoved(egui::pos2(300.0, 200.0))], ..Default::default() };
+        assert!(!dismiss_input(&mut raw, true));
+        assert_eq!(raw.events.len(), 1);
+    }
 }

apps/vectorcraft/src/main.rs

@@ -27,11 +27,14 @@ mod mac_menu;
 #[cfg(target_os = "macos")]
 mod open_documents;
 mod printing;
+#[cfg(all(windows, not(target_vendor = "win7")))]
+mod system_fonts;
 mod window;
 
 use vectorcraft_engine::Session;
 use vectorcraft_engine::cmd::fileio;
 use vectorcraft_ui_egui::graphics::GraphicsLoss;
+use vectorcraft_ui_egui::picks::PickRequest;
 use vectorcraft_ui_egui::{ClipboardProbeFactory, FilePick, Services, VectorcraftApp};
 
 struct App {
@@ -68,6 +71,10 @@ impl eframe::App for App {
         }
     }
     fn raw_input_hook(&mut self, _ctx: &egui::Context, raw: &mut egui::RawInput) {
+        #[cfg(target_os = "macos")]
+        if self.app.services.native_menu.is_some() {
+            mac_menu::raw_input_hook(raw);
+        }
         self.app.raw_input_hook(raw);
     }
     fn ui(&mut self, ui: &mut egui::Ui, _frame: &mut eframe::Frame) {
@@ -179,9 +186,22 @@ fn save_prefs(app: &VectorcraftApp) {
     }
 }
 
-/// A native file dialog showing `pick`'s file types, folder and suggested name.
-fn file_dialog(pick: &FilePick) -> rfd::FileDialog {
-    let d = pick.filters.iter().fold(rfd::FileDialog::new(), |d, (name, exts)| d.add_filter(*name, exts));
+/// The window file dialogs belong to.
+type Parent = Option<std::sync::Arc<winit::window::Window>>;
+
+/// A native file dialog for `request` over `parent` (Windows and Linux, where the portal then
+/// shows it over the window and keeps it in front; macOS shows them as before).
+fn file_dialog(request: &PickRequest, parent: &Parent) -> rfd::FileDialog {
+    let d = match parent {
+        Some(w) if !cfg!(target_os = "macos") => rfd::FileDialog::new().set_parent(&**w),
+        _ => rfd::FileDialog::new(),
+    };
+    let pick = match request {
+        PickRequest::Open(pick) | PickRequest::Save(pick) => pick,
+        PickRequest::OpenMany => return fileio::place_filters().fold(d.set_title("Place"), |d, (name, exts)| d.add_filter(name, exts)),
+        PickRequest::Folder => return d,
+    };
+    let d = pick.filters.iter().fold(d, |d, (name, exts)| d.add_filter(*name, exts));
     let d = match &pick.folder {
         Some(folder) => d.set_directory(folder),
         None => d,
@@ -189,6 +209,28 @@ fn file_dialog(pick: &FilePick) -> rfd::FileDialog {
     if pick.name.is_empty() { d } else { d.set_file_name(&pick.name) }
 }
 
+/// Show `dialog` for `request` (on the calling thread, until it closes) → the paths picked.
+fn show_dialog(dialog: rfd::FileDialog, request: &PickRequest) -> Vec<String> {
+    let paths = match request {
+        PickRequest::Open(_) => dialog.pick_file().into_iter().collect(),
+        PickRequest::OpenMany => dialog.pick_files().unwrap_or_default(),
+        PickRequest::Save(pick) => {
+            // The Templates folder may not exist yet.
+            if let Some(folder) = &pick.folder {
+                let _ = std::fs::create_dir_all(folder);
+            }
+            dialog.save_file().into_iter().collect()
+        }
+        PickRequest::Folder => dialog.pick_folder().into_iter().collect(),
+    };
+    paths.into_iter().map(|p| p.to_string_lossy().to_string()).collect()
+}
+
+/// Show the dialog for `request` over `parent` now → the paths picked.
+fn pick_now(request: PickRequest, parent: &Parent) -> Vec<String> {
+    show_dialog(file_dialog(&request, parent), &request)
+}
+
 /// File → Show in Folder: select `path` in Finder / Explorer, or open its folder elsewhere.
 fn reveal(path: &str) -> Result<(), String> {
     reveal_command(path).spawn().map(|_| ()).map_err(|e| format!("can't show {path}: {e}"))
@@ -224,25 +266,31 @@ fn write_file(path: &str, bytes: &[u8]) -> Result<(), String> {
     fileio::write_atomic(std::path::Path::new(path), bytes).map_err(|e| e.to_string())
 }
 
-fn services() -> Services {
+/// Linux: show the dialog for `request` over `parent` on a thread of its own, answering on the
+/// receiver. Shown on the UI thread, nothing would answer the compositor meanwhile, which then
+/// offers to kill the window as not responding (#592).
+fn start_pick(request: PickRequest, parent: &Parent) -> Option<std::sync::mpsc::Receiver<Vec<String>>> {
+    let dialog = file_dialog(&request, parent);
+    let (tx, rx) = std::sync::mpsc::channel();
+    std::thread::Builder::new()
+        .name("file-dialog".into())
+        .spawn(move || {
+            // The app gone meanwhile has no use for the answer.
+            let _ = tx.send(show_dialog(dialog, &request));
+        })
+        .ok()?;
+    Some(rx)
+}
+
+fn services(parent: Parent) -> Services {
+    let (p1, p2, p3, p4, p5) = (parent.clone(), parent.clone(), parent.clone(), parent.clone(), parent);
     Services {
-        pick_open: Some(Box::new(|pick: &FilePick| file_dialog(pick).pick_file().map(|p| p.to_string_lossy().to_string()))),
-        pick_open_multi: Some(Box::new(|| {
-            fileio::place_filters()
-                .fold(rfd::FileDialog::new().set_title("Place"), |d, (name, exts)| d.add_filter(name, exts))
-                .pick_files()
-                .unwrap_or_default()
-                .into_iter()
-                .map(|p| p.to_string_lossy().to_string())
-                .collect()
-        })),
-        pick_save: Some(Box::new(|pick: &FilePick| {
-            // The Templates folder may not exist yet.
-            if let Some(folder) = &pick.folder {
-                let _ = std::fs::create_dir_all(folder);
-            }
-            file_dialog(pick).save_file().map(|p| p.to_string_lossy().to_string())
-        })),
+        pick_open: Some(Box::new(move |pick: &FilePick| pick_now(PickRequest::Open(pick.clone()), &p1).into_iter().next())),
+        pick_open_multi: Some(Box::new(move || pick_now(PickRequest::OpenMany, &p2))),
+        pick_save: Some(Box::new(move |pick: &FilePick| pick_now(PickRequest::Save(pick.clone()), &p3).into_iter().next())),
+        // Windows and macOS dialogs run the window's events while they are open; Linux's don't.
+        start_pick: cfg!(all(unix, not(target_os = "macos")))
+            .then(|| Box::new(move |request: PickRequest| start_pick(request, &p5)) as vectorcraft_ui_egui::picks::StartPick),
         read: Some(Box::new(|p: &str| std::fs::read(p).map_err(|e| e.to_string()))),
         write: Some(Box::new(write_file)),
         // Background Save and Export write from a worker thread.
@@ -260,7 +308,7 @@ fn services() -> Services {
         reveal: Some(Box::new(reveal)),
         // Links panel: Edit Original; Package: Show Package. Relink to Folder and Package pick folders.
         open_file: Some(Box::new(open_file)),
-        pick_folder: Some(Box::new(|| rfd::FileDialog::new().pick_folder().map(|p| p.to_string_lossy().to_string()))),
+        pick_folder: Some(Box::new(move || pick_now(PickRequest::Folder, &p4).into_iter().next())),
         // File → Print: the system's printers and print queue.
         print: Some(Box::new(printing::SystemPrint)),
         ..Default::default()
@@ -310,6 +358,9 @@ fn main() -> std::process::ExitCode {
     // First, so every start-up warning is recorded (`logging`).
     let logger = logging::install();
     vectorcraft_ui_egui::i18n::detect_system_lang_in_background();
+    // Before the first font scan (the app's start): the fonts font services load (#579).
+    #[cfg(all(windows, not(target_vendor = "win7")))]
+    system_fonts::install();
     let mut control_port: Option<u16> = std::env::var("VECTORCRAFT_CONTROL_PORT").ok().and_then(|p| p.parse().ok());
     let mut files = Vec::new();
     let mut in_window_menus = std::env::var_os("VECTORCRAFT_IN_WINDOW_MENUS").is_some_and(|v| !v.is_empty() && v != "0");
@@ -388,7 +439,7 @@ fn main() -> std::process::ExitCode {
             "VectorCraft",
             options,
             Box::new(move |cc| {
-                let mut app = VectorcraftApp::new(Session::new(), services());
+                let mut app = VectorcraftApp::new(Session::new(), services(cc.winit_window().cloned()));
                 load_prefs(&mut app, saved);
                 // Fit the window to its monitor, or put it back where it was (still hidden).
                 if let Some(w) = cc.winit_window() {

apps/vectorcraft/src/system_fonts.rs

@@ -0,0 +1,92 @@
+//! Windows: the font files in DirectWrite's system font collection, scanned with the font folders
+//! (`vectorcraft_text::set_platform_font_files`). The desktop app and `vectorcraft-cli` (exports,
+//! MCP) both install it; the CLI shares this file.
+//!
+//! Font services such as Adobe Fonts load their fonts with GDI at run time, from files in their
+//! own folders, without installing them: the font folders and the registry don't list them. Since
+//! Windows 10 (version 1607) DirectWrite's system font collection holds them too
+//! (<https://learn.microsoft.com/windows/win32/directwrite/what-s-new-in-directwrite-for-windows-8-consumer-preview>,
+//! "Support for Adobe Typekit and other font-service clients"), so VectorCraft lists them as other
+//! apps do, reading the files in place (#579).
+//!
+//! DirectWrite is COM, which has no safe API, hence the scoped `unsafe_code` allowance.
+#![allow(unsafe_code)]
+
+use std::collections::BTreeSet;
+
+use windows::Win32::Graphics::DirectWrite::{
+    DWRITE_FACTORY_TYPE_SHARED, DWriteCreateFactory, IDWriteFactory3, IDWriteFontSet, IDWriteLocalFontFileLoader,
+};
+use windows::core::Interface;
+
+/// The most fonts read from the collection (a system has a few thousand).
+const MAX_FONTS: u32 = 1 << 16;
+/// The longest file path taken, in UTF-16 units (Windows' own limit).
+const MAX_PATH: u32 = 32_767;
+
+/// Have the font scans read the font files DirectWrite lists.
+pub fn install() {
+    vectorcraft_text::set_platform_font_files(font_files);
+}
+
+/// The local files of the fonts in DirectWrite's system font collection as it is now (fonts
+/// loaded since the last call included). None before Windows 10, or when DirectWrite fails: the
+/// font folders and the registry still list the installed fonts.
+fn font_files() -> Vec<String> {
+    match collection_files() {
+        Ok(files) => files.into_iter().collect(),
+        Err(e) => {
+            log::debug!("DirectWrite's system fonts aren't listed: {e}");
+            Vec::new()
+        }
+    }
+}
+
+fn collection_files() -> windows::core::Result<BTreeSet<String>> {
+    // SAFETY: plain DirectWrite calls on interfaces it returned, each checked for failure; the
+    // collection is asked to check for fonts loaded since the factory last looked.
+    let set = unsafe {
+        let factory: IDWriteFactory3 = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED)?;
+        let mut collection = None;
+        factory.GetSystemFontCollection(false, &mut collection, true)?;
+        let Some(collection) = collection else { return Ok(BTreeSet::new()) };
+        collection.GetFontSet()?
+    };
+    // SAFETY: a count of the set's fonts.
+    let count = unsafe { set.GetFontCount() }.min(MAX_FONTS);
+    // Faces of one file (a collection's, a variable font's instances) name it once.
+    Ok((0..count).filter_map(|i| local_path(&set, i)).collect())
+}
+
+/// The path of the file holding font `i` of `set`, when it is a local file (not a downloadable
+/// font, nor one in memory).
+fn local_path(set: &IDWriteFontSet, i: u32) -> Option<String> {
+    // SAFETY: `i` is below the set's count; the key DirectWrite hands back stays valid while
+    // `file` (which owns it) lives, and is passed back with its own size; the path buffer is
+    // sized from DirectWrite's answer plus the terminating NUL.
+    unsafe {
+        let file = set.GetFontFaceReference(i).ok()?.GetFontFile().ok()?;
+        let loader: IDWriteLocalFontFileLoader = file.GetLoader().ok()?.cast().ok()?;
+        let (mut key, mut size) = (std::ptr::null_mut(), 0u32);
+        file.GetReferenceKey(&mut key, &mut size).ok()?;
+        let len = loader.GetFilePathLengthFromKey(key, size).ok()?;
+        if len == 0 || len > MAX_PATH {
+            return None;
+        }
+        let mut path = vec![0u16; len as usize + 1];
+        loader.GetFilePathFromKey(key, size, &mut path).ok()?;
+        Some(String::from_utf16_lossy(path.get(..len as usize)?))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    /// DirectWrite lists the installed fonts, by their files' full paths.
+    #[test]
+    fn directwrite_lists_the_installed_font_files() {
+        let files = super::font_files();
+        assert!(files.iter().all(|f| std::path::Path::new(f).is_absolute()), "{:?}", files.first());
+        let fonts = std::path::Path::new(&std::env::var("WINDIR").unwrap()).join("Fonts").to_string_lossy().to_lowercase();
+        assert!(files.iter().any(|f| f.to_lowercase().starts_with(&fonts)), "{} files, {:?}", files.len(), files.first());
+    }
+}

contributors/people.toml

@@ -25,3 +25,9 @@ sync_github_name = false
 [people.callmeBalloch]
 real_name = "Riccardo Balloch"
 sync_github_name = false
+
+[people.mo0kid]
+sync_github_name = true
+
+[people.omd0]
+sync_github_name = true

crates/cad/src/scene.rs

@@ -315,7 +315,7 @@ impl<'a> Scene<'a> {
                 }
             }
             // Live blends, envelopes, meshes and repeats are written as their evaluated art.
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 let g = vectorcraft_effects::expand_live_deep(Some(self.doc), n);
                 for c in g.children().into_iter().flatten() {
                     self.node(c, false);

crates/doc/src/blend.rs

@@ -527,7 +527,8 @@ impl Lerp {
             (NodeKind::Mesh(ma), NodeKind::Mesh(mb)) if ma.rows == mb.rows && ma.cols == mb.cols && ma.points.len() == mb.points.len() => Shape::Mesh,
             (NodeKind::Text(_), NodeKind::Text(_))
             | (NodeKind::SymbolInstance { .. }, NodeKind::SymbolInstance { .. })
-            | (NodeKind::Image(_), NodeKind::Image(_)) => Shape::Placed,
+            | (NodeKind::Image(_), NodeKind::Image(_))
+            | (NodeKind::PlacedDocument(_), NodeKind::PlacedDocument(_)) => Shape::Placed,
             _ => match (node_path(a), node_path(b)) {
                 (Some((pa, ra, ma)), Some((pb, rb, mb))) => {
                     Shape::Path { pair: PathPair::new(&pa, &pb, starts), rules: (ra, rb), members: ma.zip(mb) }
@@ -586,6 +587,7 @@ impl Lerp {
                         *o = lerp_affine(*x, *y, t)
                     }
                     (NodeKind::Image(o), NodeKind::Image(x), NodeKind::Image(y)) => o.xf = lerp_affine(x.xf, y.xf, t),
+                    (NodeKind::PlacedDocument(o), NodeKind::PlacedDocument(x), NodeKind::PlacedDocument(y)) => o.xf = lerp_affine(x.xf, y.xf, t),
                     _ => {}
                 }
                 n.mask = None;

crates/doc/src/hit.rs

@@ -44,6 +44,8 @@ impl Hit {
 /// Options for hit testing.
 #[derive(Clone, Copy, Debug)]
 pub struct HitOptions {
+    /// The isolated construction container, whose retained Shaper sources are hittable.
+    pub scope: Option<NodeId>,
     /// Tolerance in document units (screen tolerance / zoom).
     pub tol: f64,
     /// Outline mode: only outlines are hittable.
@@ -58,7 +60,7 @@ pub struct HitOptions {
 
 impl Default for HitOptions {
     fn default() -> Self {
-        Self { tol: 3.0, outline: false, path_only: false, type_path_only: false }
+        Self { tol: 3.0, outline: false, path_only: false, type_path_only: false, scope: None }
     }
 }
 
@@ -70,6 +72,7 @@ pub fn hit_test(doc: &Document, p: Point, opt: HitOptions) -> Option<Hit> {
 /// The objects under `p` that [`Hit::top_object`] picks in `scope` (isolation mode), topmost
 /// first: what clicks there select, one below the other (Cmd/Ctrl-click selects behind).
 pub fn objects_at(doc: &Document, p: Point, opt: HitOptions, scope: Option<NodeId>) -> Vec<NodeId> {
+    let opt = HitOptions { scope: scope.or(opt.scope), ..opt };
     let mut tops: Vec<NodeId> = vec![];
     // Each round leaves out the objects found so far (and everything inside them).
     while let Some(top) = hit_test_skipping(doc, p, opt, &|id| tops.contains(&id)).map(|h| h.top_object(scope)) {
@@ -131,13 +134,20 @@ fn hit_children(parent: &Node, p: Point, opt: HitOptions, skip: &dyn Fn(NodeId)
     {
         return None;
     }
-    for c in children.iter().rev() {
+    for (i, c) in children.iter().enumerate().rev() {
+        if parent.shaper.is_some() {
+            let construction = children.first().is_some_and(|source| Some(source.id) == opt.scope);
+            if (i == 0) != construction {
+                continue;
+            }
+        }
         // Hidden, locked and template sublayers block clicks like top-level layers do.
         if !c.visible || c.locked || c.is_template() || skip(c.id) {
             continue;
         }
         // (An envelope's content sits where it was, not where the envelope draws it.)
-        if !edits_contents(c)
+        if !(edits_contents(c)
+            || c.shaper.is_some() && c.children().and_then(|children| children.first()).is_some_and(|source| Some(source.id) == opt.scope))
             && let Some(b) = c.reach_bounds()
             && !b.inflate(opt.tol, opt.tol).contains(p)
         {
@@ -199,9 +209,12 @@ fn hit_leaf(n: &Node, p: Point, opt: HitOptions) -> Option<HitKind> {
             n.geometric_bounds().filter(|b| b.inflate(opt.tol, opt.tol).contains(p))?;
             on_type_path(n, t, p, opt.tol).then_some(HitKind::Outline)
         }
-        NodeKind::Text(_) | NodeKind::Image(_) | NodeKind::SymbolInstance { .. } | NodeKind::Blend { .. } | NodeKind::Envelope { .. } => {
-            n.geometric_bounds().filter(|b| b.inflate(opt.tol, opt.tol).contains(p)).map(|_| HitKind::Bounds)
-        }
+        NodeKind::Text(_)
+        | NodeKind::Image(_)
+        | NodeKind::PlacedDocument(_)
+        | NodeKind::SymbolInstance { .. }
+        | NodeKind::Blend { .. }
+        | NodeKind::Envelope { .. } => n.geometric_bounds().filter(|b| b.inflate(opt.tol, opt.tol).contains(p)).map(|_| HitKind::Bounds),
         NodeKind::Repeat(r) => r.expand().iter().find_map(|g| hit_any(g, p, opt)),
         NodeKind::Mesh(m) => {
             let bp = m.outline().to_bezpath();

crates/doc/src/lib.rs

@@ -24,6 +24,7 @@ pub mod overprint;
 pub mod pattern;
 pub mod perspective;
 mod pixels;
+pub mod placed_document;
 pub mod profiles;
 pub mod puppet;
 pub mod range;
@@ -32,6 +33,7 @@ mod reach;
 pub mod recolor;
 pub mod selection;
 pub mod setup;
+pub mod shaper;
 pub mod slices;
 pub mod style_libs;
 pub mod swatches;
@@ -72,6 +74,7 @@ pub use node::{ImageObject, LAYER_COLORS, LayerColor, LiveShape, Node, NodeId, N
 pub use orient::OrientedBox;
 pub use pattern::{Overlap, PatternDef, PatternEdit, RepeatKind, RepeatSpec, TileType};
 pub use perspective::PerspectiveAttachment;
+pub use placed_document::PlacedDocument;
 pub use profiles::ColorProfiles;
 pub use puppet::{PuppetPin, PuppetPins};
 pub use rastersettings::{RasterColorModel, RasterEffectsSettings};
@@ -80,8 +83,9 @@ pub use setup::{Background, DocSetup, ExportText, GridSize, Quotes};
 pub use slices::{CellAlign, CellVAlign, Slice, SliceArea, SliceKind, SliceOptions, SliceSource};
 pub use style_libs::StyleLibrary;
 pub use text::{
-    AreaOptions, Burasagari, CharAlign, CharPosition, CharStyle, FirstBaseline, Justify, LeadingModel, Mojikumi, ParaDirection, ParaStyle, PathAlign,
-    PathEffect, ScriptMetrics, TabAlign, TabStop, TextKind, TextObject, TextRun, TextStyleDef, TextWrap, WrapShape,
+    AreaFit, AreaOptions, Burasagari, CharAlign, CharPosition, CharStyle, Composer, FirstBaseline, Justify, LeadingModel, Mojikumi, ParaDirection,
+    ParaStyle, PathAlign, PathEffect, ScriptMetrics, TabAlign, TabStop, TextKind, TextObject, TextRun, TextStyleDef, TextWrap, VerticalAlign,
+    WrapShape,
 };
 pub use vectorcraft_color as color;
 pub use vectorcraft_geom as geom;

crates/doc/src/links.rs

@@ -137,7 +137,7 @@ impl Document {
         }
     }
 
-    /// The keys of image blobs only linked images show: what a save writes as their preview.
+    /// The keys of image blobs only linked images (or placed documents, always linked) show: what a save writes as their preview.
     pub fn linked_only_images(&self) -> BTreeSet<String> {
         if self.images.values().all(|b| b.proxy.is_none()) {
             return BTreeSet::new();
@@ -152,6 +152,8 @@ impl Document {
                 u.1 = true;
             }
         });
+        // A placed document saves its file's preview the same way.
+        self.visit_placed(|_, p| uses.entry(p.key.as_str()).or_default().0 = true);
         uses.into_iter().filter(|(_, (linked, embedded))| *linked && !embedded).map(|(k, _)| k.to_string()).collect()
     }
 }

crates/doc/src/live.rs

@@ -1447,6 +1447,8 @@ fn map_node(n: &Node, w: &Warper) -> Node {
             let im = im.clone();
             return warp_image(&out, &im, w);
         }
+        // Its art is plain, so it warps at this depth.
+        NodeKind::PlacedDocument(_) => return map_node(&expanded_group_hooks(n, w.hooks), w),
     }
     out
 }
@@ -1607,7 +1609,7 @@ pub fn envelope_bounds(content: &[Arc<Node>], kind: &EnvelopeKind, frame: Affine
 
 /// Is this one of the live kinds?
 pub fn is_live(n: &Node) -> bool {
-    matches!(n.kind, NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_))
+    matches!(n.kind, NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_))
 }
 
 /// Mesh tessellation as filled quad paths (no stroke), `n`×`n` per patch.
@@ -1641,6 +1643,7 @@ pub fn expand_live_hooks(n: &Node, hooks: Hooks) -> Vec<Node> {
         NodeKind::Envelope { content, kind, fidelity, options, frame, .. } => expand_envelope(content, kind, *fidelity, *options, *frame, hooks),
         NodeKind::Mesh(m) => mesh_quad_nodes(m, 8),
         NodeKind::Repeat(r) => r.expand(),
+        NodeKind::PlacedDocument(p) => p.art(n),
         _ => vec![n.clone()],
     }
 }

crates/doc/src/node.rs

@@ -423,6 +423,9 @@ pub enum NodeKind {
     Mesh(GradientMesh),
     /// Live Repeat (radial / grid / mirror) of source art.
     Repeat(RepeatSpec),
+    /// A placed document: an artboard of another VectorCraft file, linked and locked (see
+    /// [`crate::placed_document`]).
+    PlacedDocument(Box<crate::placed_document::PlacedDocument>),
 }
 
 fn yes() -> bool {
@@ -469,6 +472,9 @@ pub struct Node {
     /// Graph object: the group's children are generated from this spec (Object → Graph).
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub graph: Option<Box<crate::graph::GraphSpec>>,
+    /// Editable Shaper composition; the original art is retained in its source child.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub shaper: Option<Box<crate::shaper::ShaperSpec>>,
     pub kind: NodeKind,
     /// The [`crate::GraphicStyle::id`] last applied to this object. It stays linked while it keeps
     /// that style's look: editing its appearance or transparency breaks the link.
@@ -533,6 +539,7 @@ impl Node {
             trace: None,
             wrap: None,
             graph: None,
+            shaper: None,
             kind,
             graphic_style: None,
             attrs: None,
@@ -642,6 +649,7 @@ impl Node {
             NodeKind::Envelope { .. } => "Envelope",
             NodeKind::Mesh(_) => "Mesh",
             NodeKind::Repeat(r) => r.kind.label(),
+            NodeKind::PlacedDocument(_) => "Placed Document",
         }
     }
     /// Name shown in the Layers panel: explicit name or `<Kind>`.
@@ -703,6 +711,7 @@ impl Node {
             }
             NodeKind::Layer { children, .. } | NodeKind::Group { children, .. } | NodeKind::Compound { children, .. } => children
                 .iter()
+                .skip(usize::from(self.shaper.is_some()))
                 .filter(|c| c.visible || !matches!(self.kind, NodeKind::Layer { .. }))
                 .fold(None, |acc, c| vectorcraft_geom::union_opt(acc, c.geometric_bounds())),
             NodeKind::Text(t) => self.projected(t.bounds()),
@@ -715,6 +724,7 @@ impl Node {
             NodeKind::Envelope { content, kind, frame, .. } => crate::live::envelope_bounds(content, kind, *frame),
             NodeKind::Mesh(m) => m.bounds(),
             NodeKind::Repeat(r) => r.bounds(),
+            NodeKind::PlacedDocument(p) => Some(p.bounds()),
         }
     }
     /// Visual bounds: what the object paints, its strokes included (paths and compound paths
@@ -733,7 +743,11 @@ impl Node {
             NodeKind::Layer { children, .. } | NodeKind::Group { children, .. } => {
                 // The container's own strokes paint around its members.
                 let o = self.appearance.outset();
-                children.iter().fold(None, |acc, c| vectorcraft_geom::union_opt(acc, c.visual_bounds())).map(|b| b.inflate(o, o))
+                children
+                    .iter()
+                    .skip(usize::from(self.shaper.is_some()))
+                    .fold(None, |acc, c| vectorcraft_geom::union_opt(acc, c.visual_bounds()))
+                    .map(|b| b.inflate(o, o))
             }
             NodeKind::Blend { children, spec } => {
                 let b = children.iter().fold(None, |acc, c| vectorcraft_geom::union_opt(acc, c.visual_bounds()));
@@ -810,6 +824,7 @@ impl Node {
                 }
             }
             NodeKind::Image(im) => im.xf = a * im.xf,
+            NodeKind::PlacedDocument(p) => p.xf = a * p.xf,
             NodeKind::SymbolInstance { xf, .. } => *xf = a * *xf,
             NodeKind::Blend { children, spec } => {
                 for c in children.iter_mut() {
@@ -959,7 +974,7 @@ impl Node {
                 }
             }
             NodeKind::Group { children, .. } | NodeKind::Layer { children, .. } => {
-                for c in children.iter().filter(|c| c.visible) {
+                for c in children.iter().skip(usize::from(self.shaper.is_some())).filter(|c| c.visible) {
                     c.push_clip_shapes(text, out);
                 }
             }
@@ -972,6 +987,10 @@ impl Node {
                 let frame = shapes::rectangle(Rect::new(0.0, 0.0, im.width as f64, im.height as f64)).transformed(im.xf);
                 out.push((frame.to_bezpath(), FillRule::NonZero));
             }
+            NodeKind::PlacedDocument(p) => {
+                let frame = shapes::rectangle(p.natural()).transformed(p.xf);
+                out.push((frame.to_bezpath(), FillRule::NonZero));
+            }
             NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
                 crate::live::expand_deep(self, text).push_clip_shapes(text, out);
             }
@@ -1204,6 +1223,10 @@ pub struct ObjectAttributes {
     /// The note shown in the Attributes panel.
     #[serde(default, skip_serializing_if = "String::is_empty")]
     pub note: String,
+    /// The object's own data, in order: SVG's `data-*` attributes (`data-pivot="100,180"` is
+    /// `("pivot", "100,180")`), kept from import to export (`object.setProps {data}`).
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub data: Vec<(String, String)>,
 }
 
 /// The Attributes panel's Image Map shapes.

crates/doc/src/placed_document.rs

@@ -0,0 +1,684 @@
+//! Placed documents: another VectorCraft file placed linked ([`PlacedDocument`]).
+//!
+//! The object keeps the link to the file and the file's bytes, stored like image data in
+//! [`Document::images`] (with a small preview a save writes instead, as for linked images), so the
+//! document shows correctly without the file. The art it shows is read from those bytes and never
+//! joins the object tree, so editing can't reach it: it is locked by design. Drawing and exporting
+//! expand it like a live object ([`crate::live::expanded`]).
+//!
+//! The file is read by the native format's loader, which lives above this crate and registers
+//! itself ([`set_loader`]); the art read is kept in a small cache by content. Before exporting,
+//! every exporter calls [`Document::with_placed_art`], which adds the resources the art uses
+//! (images, symbols, patterns) under names of their own ([`RESOURCE_PREFIX`]) to a temporary copy
+//! of the document, so they never meet the user's or show in panels. Placed documents inside a
+//! placed document are read the same way, up to [`MAX_DEPTH`] deep (documents that place each
+//! other stop there, showing their previews).
+
+use std::borrow::Cow;
+use std::collections::BTreeSet;
+use std::sync::{Arc, Mutex, MutexGuard, OnceLock, PoisonError};
+
+use serde::{Deserialize, Serialize};
+use vectorcraft_geom::{Affine, Rect};
+
+use vectorcraft_color::Paint;
+
+use crate::{AppearanceItem, Document, ImageBlob, ImageObject, LinkInfo, Node, NodeKind, PatternDef, PlacementOptions, Symbol};
+
+/// A placed document: an artboard of another VectorCraft file, shown as one locked object.
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct PlacedDocument {
+    /// The file (its `page` is the artboard shown, 1-based).
+    pub link: LinkInfo,
+    /// Key into [`Document::images`]: the file's bytes (see [`key_for`]).
+    pub key: String,
+    /// The art's bounds rather than the artboard (File › Place's `crop: "bounding"`).
+    #[serde(default, skip_serializing_if = "crate::skip::is_default")]
+    pub bounding: bool,
+    /// The artboard's size (or the art's) at 100% (pt).
+    pub width: f64,
+    pub height: f64,
+    /// Maps the box (0..width, 0..height) into the document.
+    pub xf: Affine,
+    /// Links panel → Placement Options: how the file read again takes this object's place.
+    #[serde(default, skip_serializing_if = "crate::skip::is_default")]
+    pub placement: PlacementOptions,
+}
+
+/// The images key of a file's bytes (`hash`, [`crate::links::hash_bytes`]) placed showing
+/// artboard `page` (`bounding`: its art's bounds): objects showing the same thing share a blob and
+/// its preview.
+pub fn key_for(hash: &str, page: u32, bounding: bool) -> String {
+    format!("{hash}-{page}{}", if bounding { "b" } else { "" })
+}
+
+impl PlacedDocument {
+    /// The artboard shown (1-based).
+    pub fn page(&self) -> u32 {
+        self.link.page.unwrap_or(1)
+    }
+
+    /// The box at 100%.
+    pub fn natural(&self) -> Rect {
+        Rect::new(0.0, 0.0, self.width, self.height)
+    }
+
+    /// The four corners of the box in the document.
+    pub fn corners(&self) -> [vectorcraft_geom::Point; 4] {
+        let r = self.natural();
+        [(r.x0, r.y0), (r.x1, r.y0), (r.x1, r.y1), (r.x0, r.y1)].map(|(x, y)| self.xf * vectorcraft_geom::Point::new(x, y))
+    }
+
+    /// The box in the document (axis-aligned).
+    pub fn bounds(&self) -> Rect {
+        self.xf.transform_rect_bbox(self.natural())
+    }
+
+    /// The transform from the file's coordinates (its artboard or art bounds `frame`) to the
+    /// document; `None` when either size is empty.
+    pub fn art_xf(&self, frame: Rect) -> Option<Affine> {
+        let ok = self.width > 0.0 && self.height > 0.0 && frame.width() > 0.0 && frame.height() > 0.0;
+        ok.then(|| {
+            self.xf * Affine::scale_non_uniform(self.width / frame.width(), self.height / frame.height()) * Affine::translate((-frame.x0, -frame.y0))
+        })
+    }
+
+    /// The art the object shows, as plain objects with `n`'s id: one group, its resources named
+    /// as [`Document::with_placed_art`] adds them (nothing until that has read it).
+    pub fn art(&self, n: &Node) -> Vec<Node> {
+        let prefix = prefix(&self.key);
+        read_cached(self).and_then(|e| self.art_node(n, &e, &prefix)).into_iter().collect()
+    }
+
+    /// Read `e`'s art placed as this object `n` shows it (`n`'s id), its resources renamed with
+    /// `prefix`.
+    fn art_node(&self, n: &Node, e: &ReadDocument, prefix: &str) -> Option<Node> {
+        let m = self.art_xf(e.frame)?;
+        let mut g = (*e.art).clone();
+        rename(&mut g, prefix);
+        g.transform(m, true);
+        each_mut(&mut g, &mut |c| crate::pattern::transform_pattern_paints(c, m));
+        g.id = n.id;
+        Some(g)
+    }
+
+    /// An image object showing preview `bytes` (stored under this object's key) in this object's
+    /// box: what it shows and outputs as when the file can't be read.
+    pub fn preview_image(&self, bytes: &[u8]) -> Option<ImageObject> {
+        let (w, h) = image_size(bytes).filter(|(w, h)| *w > 0 && *h > 0)?;
+        let px = Affine::scale_non_uniform(self.width / w as f64, self.height / h as f64);
+        Some(ImageObject { key: self.key.clone(), width: w, height: h, xf: self.xf * px, link: None, placement: Default::default() })
+    }
+}
+
+/// The names the resources of the art stored under `key` take in a prepared document.
+fn prefix(key: &str) -> String {
+    format!("{RESOURCE_PREFIX}{key}/")
+}
+
+/// `n` and every descendant, opacity-mask art included.
+fn walk_all<'a>(n: &'a Node, f: &mut impl FnMut(&'a Node)) {
+    f(n);
+    if let Some(m) = &n.mask {
+        walk_all(&m.art, f);
+    }
+    for c in n.children().into_iter().flatten() {
+        walk_all(c, f);
+    }
+}
+
+/// The roots of `d`'s art: layers, symbol definitions and pattern swatches.
+fn roots(d: &Document) -> impl Iterator<Item = &Arc<Node>> {
+    d.layers.iter().chain(d.symbols.iter().map(|s| &s.art)).chain(d.patterns.iter().flat_map(|p| &p.art))
+}
+
+fn roots_mut(d: &mut Document) -> impl Iterator<Item = &mut Arc<Node>> {
+    d.layers.iter_mut().chain(d.symbols.iter_mut().map(|s| &mut s.art)).chain(d.patterns.iter_mut().flat_map(|p| &mut p.art))
+}
+
+impl Document {
+    /// Visit every placed document: in the layers, then in symbol definitions and pattern
+    /// swatches, opacity-mask art included.
+    pub fn visit_placed<'a>(&'a self, mut f: impl FnMut(&'a Node, &'a PlacedDocument)) {
+        for root in roots(self) {
+            walk_all(root, &mut |n| {
+                if let NodeKind::PlacedDocument(p) = &n.kind {
+                    f(n, p);
+                }
+            });
+        }
+    }
+
+    /// Does the document hold a placed document anywhere?
+    pub fn has_placed(&self) -> bool {
+        let mut any = false;
+        self.visit_placed(|_, _| any = true);
+        any
+    }
+
+    /// Every placed document (those in the art they show too) replaced by a plain group of that
+    /// art, for apps that don't know them: call it on [`Self::with_placed_art`]'s copy. Only the
+    /// subtrees holding one are copied.
+    pub fn placed_as_groups(&mut self) {
+        fn holds(n: &Node) -> bool {
+            let mut hit = false;
+            walk_all(n, &mut |c| hit |= matches!(c.kind, NodeKind::PlacedDocument(_)));
+            hit
+        }
+        fn update(n: &mut Arc<Node>) {
+            if !holds(n) {
+                return;
+            }
+            if matches!(n.kind, NodeKind::PlacedDocument(_)) {
+                let mut g = crate::live::expanded_group(n, None);
+                g.appearance = n.appearance.clone();
+                *n = Arc::new(g);
+            }
+            // The art shown may hold placed documents too.
+            let n = Arc::make_mut(n);
+            if let Some(m) = &mut n.mask {
+                update(&mut m.art);
+            }
+            for c in n.children_mut().into_iter().flatten() {
+                update(c);
+            }
+        }
+        for root in roots_mut(self) {
+            update(root);
+        }
+    }
+
+    /// Placed documents whose key is in `keys` replaced by images of their previews (for output
+    /// when their files can't be read).
+    pub fn placed_as_previews(&mut self, keys: &BTreeSet<String>) {
+        fn update(n: &mut Arc<Node>, keys: &BTreeSet<String>, images: &std::collections::BTreeMap<String, ImageBlob>) {
+            let mut hit = false;
+            walk_all(n, &mut |c| hit |= matches!(&c.kind, NodeKind::PlacedDocument(p) if keys.contains(&p.key)));
+            if !hit {
+                return;
+            }
+            let n = Arc::make_mut(n);
+            if let NodeKind::PlacedDocument(p) = &n.kind
+                && keys.contains(&p.key)
+            {
+                if let Some(im) = images.get(&p.key).and_then(|b| p.preview_image(&b.bytes)) {
+                    n.kind = NodeKind::Image(im);
+                }
+                return;
+            }
+            if let Some(m) = &mut n.mask {
+                update(&mut m.art, keys, images);
+            }
+            for c in n.children_mut().into_iter().flatten() {
+                update(c, keys, images);
+            }
+        }
+        let images = self.images.clone();
+        for root in roots_mut(self) {
+            update(root, keys, &images);
+        }
+    }
+}
+
+// ---------- previews and the files' bytes ----------
+
+/// A placed document's preview: this many pixels per point of its box…
+pub const PREVIEW_PX_PER_PT: f64 = 1.0;
+/// …and at most this many on its longer side.
+pub const PREVIEW_MAX: u32 = 1024;
+/// How deep placed documents inside placed documents are read; deeper ones show their previews.
+pub const MAX_DEPTH: usize = 8;
+
+/// Reads `p`'s file again (`None`: not found, or changed since it was read). The engine registers
+/// one with [`set_file_reader`].
+pub type FileReader = fn(&PlacedDocument) -> Option<Vec<u8>>;
+
+static FILE_READER: OnceLock<FileReader> = OnceLock::new();
+
+/// Register how files are read again (the first registration stays).
+pub fn set_file_reader(f: FileReader) {
+    // Already set: the same engine, registered by another session.
+    let _ = FILE_READER.set(f);
+}
+
+/// The most bytes of files read again kept.
+const FULL_BYTES: usize = 512 << 20;
+
+/// Files read again, by key, the most recently read last.
+type FullFiles = Vec<(String, Arc<Vec<u8>>)>;
+
+static FULL: Mutex<FullFiles> = Mutex::new(Vec::new());
+
+fn full() -> MutexGuard<'static, FullFiles> {
+    // Entries are only pushed and removed: a panic while held leaves it whole.
+    FULL.lock().unwrap_or_else(PoisonError::into_inner)
+}
+
+/// The file's bytes when they are at hand: stored (`blob` isn't just the preview) or read again
+/// already. Never reads it.
+pub fn full_bytes_cached(p: &PlacedDocument, blob: &ImageBlob) -> Option<Arc<Vec<u8>>> {
+    if !blob.is_proxy() {
+        return Some(blob.bytes.clone());
+    }
+    full().iter().rev().find(|(k, _)| *k == p.key).map(|(_, b)| b.clone())
+}
+
+/// The file's bytes: stored, read again already, or read again now ([`set_file_reader`]). `None`
+/// when only the preview can be had.
+pub fn full_bytes(p: &PlacedDocument, blob: &ImageBlob) -> Option<Arc<Vec<u8>>> {
+    if let Some(b) = full_bytes_cached(p, blob) {
+        return Some(b);
+    }
+    let b = Arc::new(FILE_READER.get()?(p)?);
+    let mut c = full();
+    c.push((p.key.clone(), b.clone()));
+    let mut total: usize = c.iter().map(|(_, b)| b.len()).sum();
+    while total > FULL_BYTES && c.len() > 1 {
+        total = total.saturating_sub(c.remove(0).1.len());
+    }
+    Some(b)
+}
+
+/// The size in pixels of image bytes `bytes` (a preview), read from its header.
+pub fn image_size(bytes: &[u8]) -> Option<(u32, u32)> {
+    image::ImageReader::new(std::io::Cursor::new(bytes)).with_guessed_format().ok()?.into_dimensions().ok()
+}
+
+// ---------- reading files ----------
+
+/// The prefix of the names the resources of placed documents' art take in a prepared document:
+/// `placed:<key>/<name>`.
+pub const RESOURCE_PREFIX: &str = "placed:";
+
+/// Reads a placed document's file (its bytes) into what it shows: a document holding the
+/// resources (no layers), the art as one group in the file's coordinates, and the frame shown
+/// (the artboard, or the art's bounds). The native format lives above this crate, so the engine
+/// registers one with [`set_loader`].
+pub type Loader = fn(&PlacedDocument, &[u8]) -> Option<(Document, Node, Rect)>;
+
+static LOADER: OnceLock<Loader> = OnceLock::new();
+
+/// Register how files are read (the first registration stays).
+pub fn set_loader(l: Loader) {
+    // Already set: the same loader, registered by another session.
+    let _ = LOADER.set(l);
+}
+
+/// The most files kept read whatever their size.
+const CACHE_SIZE: usize = 64;
+/// Past [`CACHE_SIZE`], the most bytes of files kept read (their own sizes, standing for what
+/// reading them holds).
+const CACHE_BYTES: usize = 256 << 20;
+
+/// A placed document's file read: the art it shows, ready to draw with its own resources.
+pub struct ReadDocument {
+    key: String,
+    /// Read from the preview, not the file.
+    preview: bool,
+    /// The bytes read (what tells a cached read is still the one shown).
+    bytes: Arc<Vec<u8>>,
+    /// The artboard (or art bounds) shown: what the object's box shows.
+    pub frame: Rect,
+    /// The art as one group, in the file's coordinates. Its images, symbols and patterns are
+    /// `doc`'s, under their own names.
+    pub art: Arc<Node>,
+    /// The file's resources and setup (no layers: the art is `art`).
+    pub doc: Arc<Document>,
+}
+
+struct Entry {
+    e: Arc<ReadDocument>,
+    used: u64,
+}
+
+#[derive(Default)]
+struct Cache {
+    entries: std::collections::HashMap<(String, bool), Entry>,
+    clock: u64,
+}
+
+static CACHE: std::sync::LazyLock<Mutex<Cache>> = std::sync::LazyLock::new(Default::default);
+
+fn cache() -> MutexGuard<'static, Cache> {
+    // A panic while the cache was held leaves it whole (entries are only inserted and removed).
+    CACHE.lock().unwrap_or_else(PoisonError::into_inner)
+}
+
+impl Cache {
+    /// The read of `key` (its preview's when `preview`; made from `bytes` when given), marked used.
+    fn get(&mut self, key: &str, preview: bool, bytes: Option<&Arc<Vec<u8>>>) -> Option<Arc<ReadDocument>> {
+        self.clock += 1;
+        let clock = self.clock;
+        let e = self.entries.get_mut(&(key.to_string(), preview))?;
+        if bytes.is_some_and(|b| !Arc::ptr_eq(&e.e.bytes, b)) {
+            return None;
+        }
+        e.used = clock;
+        Some(e.e.clone())
+    }
+
+    fn insert(&mut self, e: Arc<ReadDocument>) {
+        self.clock += 1;
+        self.entries.insert((e.key.clone(), e.preview), Entry { e, used: self.clock });
+        // The least recently used go while over both limits.
+        let mut total: usize = self.entries.values().map(|x| x.e.bytes.len()).sum();
+        while self.entries.len() > CACHE_SIZE && total > CACHE_BYTES {
+            let Some(k) = self.entries.iter().min_by_key(|(_, x)| x.used).map(|(k, _)| k.clone()) else { break };
+            if let Some(x) = self.entries.remove(&k) {
+                total = total.saturating_sub(x.e.bytes.len());
+            }
+        }
+    }
+}
+
+/// `p`'s file (`bytes`) read, from the cache when it was read already: what the renderer draws a
+/// placed document from. `None` when it can't be read (or no loader is registered).
+pub fn read(p: &PlacedDocument, bytes: &Arc<Vec<u8>>) -> Option<Arc<ReadDocument>> {
+    if let Some(e) = cache().get(&p.key, false, Some(bytes)) {
+        return Some(e);
+    }
+    let loader = LOADER.get()?;
+    let (doc, art, frame) = loader(p, bytes)?;
+    let e = Arc::new(ReadDocument { key: p.key.clone(), preview: false, bytes: bytes.clone(), frame, art: Arc::new(art), doc: Arc::new(doc) });
+    cache().insert(e.clone());
+    Some(e)
+}
+
+/// `p`'s preview (`bytes`) read as art: one image filling the box.
+fn read_preview(p: &PlacedDocument, bytes: &Arc<Vec<u8>>) -> Option<Arc<ReadDocument>> {
+    if let Some(e) = cache().get(&p.key, true, Some(bytes)) {
+        return Some(e);
+    }
+    let (w, h) = image_size(bytes).filter(|(w, h)| *w > 0 && *h > 0)?;
+    let frame = p.natural();
+    let mut doc = Document::new(frame.width().max(1.0), frame.height().max(1.0));
+    doc.layers.clear();
+    doc.swatches.clear();
+    let mime = if bytes.starts_with(&[0xff, 0xd8]) { "image/jpeg" } else { "image/png" };
+    doc.images.insert("preview".into(), ImageBlob { mime: mime.into(), bytes: bytes.clone(), proxy: None });
+    let xf = Affine::scale_non_uniform(frame.width() / w as f64, frame.height() / h as f64);
+    let im = ImageObject { key: "preview".into(), width: w, height: h, xf, link: None, placement: Default::default() };
+    let art = Node::new(art_id(), NodeKind::Group { children: vec![Arc::new(Node::new(art_id(), NodeKind::Image(im)))], clip: false });
+    let e = Arc::new(ReadDocument { key: p.key.clone(), preview: true, bytes: bytes.clone(), frame, art: Arc::new(art), doc: Arc::new(doc) });
+    cache().insert(e.clone());
+    Some(e)
+}
+
+/// `p`'s file as read already (else its preview's), without reading it.
+pub fn read_cached(p: &PlacedDocument) -> Option<Arc<ReadDocument>> {
+    let mut c = cache();
+    c.get(&p.key, false, None).or_else(|| c.get(&p.key, true, None))
+}
+
+/// Keep `read` (what [`Loader`] gives), just read from `bytes` for `p` (when it was placed), so
+/// drawing it doesn't read it again.
+pub fn prime(p: &PlacedDocument, bytes: Arc<Vec<u8>>, (doc, art, frame): (Document, Node, Rect)) {
+    cache().insert(Arc::new(ReadDocument { key: p.key.clone(), preview: false, bytes, frame, art: Arc::new(art), doc: Arc::new(doc) }));
+}
+
+/// The id the read art's own nodes take (their object's, once expanded).
+fn art_id() -> crate::NodeId {
+    crate::NodeId(0)
+}
+
+/// Visit `n` and every descendant (opacity-mask art included) mutably.
+fn each_mut(n: &mut Node, f: &mut impl FnMut(&mut Node)) {
+    f(n);
+    if let Some(m) = &mut n.mask {
+        each_mut(Arc::make_mut(&mut m.art), f);
+    }
+    for c in n.children_mut().into_iter().flatten() {
+        each_mut(Arc::make_mut(c), f);
+    }
+}
+
+/// `n`'s references to images, symbols, patterns and placed files prefixed with `prefix`. Colours
+/// keep their swatch links (a spot colour stays a plate, one with the parent's spot of that name).
+fn rename(n: &mut Node, prefix: &str) {
+    let paint = |p: &mut Paint| {
+        if let Paint::Pattern { pattern, .. } = p {
+            *pattern = format!("{prefix}{pattern}");
+        }
+    };
+    each_mut(n, &mut |n| {
+        for it in &mut n.appearance.items {
+            match it {
+                AppearanceItem::Fill(f) => paint(&mut f.paint),
+                AppearanceItem::Stroke(s) => paint(&mut s.paint),
+            }
+        }
+        match &mut n.kind {
+            NodeKind::Text(t) => {
+                for r in &mut t.runs {
+                    paint(&mut r.style.fill);
+                    paint(&mut r.style.stroke);
+                }
+            }
+            NodeKind::Image(im) => im.key = format!("{prefix}{}", im.key),
+            NodeKind::PlacedDocument(p) => p.key = format!("{prefix}{}", p.key),
+            NodeKind::SymbolInstance { symbol, .. } => *symbol = format!("{prefix}{symbol}"),
+            _ => {}
+        }
+    });
+}
+
+impl Document {
+    /// This document ready to export its placed documents: their files read (the file read again
+    /// when only the preview is stored, else the preview), and the resources their art uses added
+    /// under names of their own ([`RESOURCE_PREFIX`]); the same for the placed documents in that
+    /// art, up to [`MAX_DEPTH`] deep. Borrowed when there is none. (The renderer draws them from
+    /// [`read`] instead.)
+    pub fn with_placed_art(&self) -> Cow<'_, Document> {
+        let mut queue: Vec<(PlacedDocument, usize)> = vec![];
+        let mut seen = BTreeSet::new();
+        self.visit_placed(|_, p| {
+            if seen.insert(p.key.clone()) {
+                queue.push((p.clone(), 0));
+            }
+        });
+        if queue.is_empty() {
+            return Cow::Borrowed(self);
+        }
+        let mut d = self.clone();
+        let mut found: Vec<Arc<ReadDocument>> = vec![];
+        while let Some((p, depth)) = queue.pop() {
+            let Some(blob) = d.images.get(&p.key).cloned() else { continue };
+            let full = if depth < MAX_DEPTH { full_bytes(&p, &blob) } else { None };
+            if full.and_then(|b| read(&p, &b)).is_none() {
+                let preview = if blob.is_proxy() { Some(blob.bytes.clone()) } else { blob.proxy.clone() };
+                if let Some(bytes) = preview {
+                    read_preview(&p, &bytes);
+                }
+            }
+            // What the art (`PlacedDocument::art`) will show.
+            let Some(e) = read_cached(&p) else { continue };
+            let prefix = prefix(&p.key);
+            add_resources(&mut d, &e.doc, &prefix);
+            // The placed documents in that art, under their names here.
+            let inner = std::iter::once(&e.art).chain(e.doc.symbols.iter().map(|s| &s.art)).chain(e.doc.patterns.iter().flat_map(|p| &p.art));
+            for root in inner {
+                walk_all(root, &mut |n| {
+                    if let NodeKind::PlacedDocument(q) = &n.kind {
+                        let key = format!("{prefix}{}", q.key);
+                        if seen.insert(key.clone()) {
+                            queue.push((PlacedDocument { key, ..(**q).clone() }, depth + 1));
+                        }
+                    }
+                });
+            }
+            found.push(e);
+        }
+        // Read last, so all stay read while the art is made (see `PlacedDocument::art`).
+        {
+            let mut c = cache();
+            for e in &found {
+                c.get(&e.key, e.preview, None);
+            }
+        }
+        Cow::Owned(d)
+    }
+
+    /// Drop the resources [`Self::with_placed_art`] added under its names (what a save leaves out).
+    pub fn drop_placed_resources(&mut self) {
+        self.symbols.retain(|s| !s.name.starts_with(RESOURCE_PREFIX));
+        self.patterns.retain(|p| !p.name.starts_with(RESOURCE_PREFIX));
+        self.images.retain(|k, _| !k.starts_with(RESOURCE_PREFIX));
+    }
+}
+
+/// The resources of `src` (a read file's) added to `d` under `prefix`: symbols, patterns, images;
+/// swatches by name, when `d` has none of that name.
+fn add_resources(d: &mut Document, src: &Document, prefix: &str) {
+    for s in &src.symbols {
+        let name = format!("{prefix}{}", s.name);
+        if !d.symbols.iter().any(|x| x.name == name) {
+            let mut s = s.clone();
+            rename(Arc::make_mut(&mut s.art), prefix);
+            d.symbols.push(Symbol { name, ..s });
+        }
+    }
+    for p in &src.patterns {
+        let name = format!("{prefix}{}", p.name);
+        if d.pattern(&name).is_none() {
+            let mut p = p.clone();
+            p.art.iter_mut().for_each(|a| rename(Arc::make_mut(a), prefix));
+            d.patterns.push(PatternDef { name, ..p });
+        }
+    }
+    for (k, b) in &src.images {
+        d.images.entry(format!("{prefix}{k}")).or_insert_with(|| b.clone());
+    }
+    for w in &src.swatches {
+        if d.swatch(&w.name).is_none() {
+            d.swatches.push(w.clone());
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::NodeId;
+
+    fn placed(key: &str) -> PlacedDocument {
+        PlacedDocument {
+            link: LinkInfo::new("/art/logo.vectorcraft"),
+            key: key.into(),
+            bounding: false,
+            width: 80.0,
+            height: 40.0,
+            xf: Affine::translate((10.0, 10.0)),
+            placement: Default::default(),
+        }
+    }
+
+    /// Whatever the bytes: a 40×20 artboard showing a symbol instance and, when the bytes say
+    /// `nest`, a placed document of key `inner`.
+    fn stub_loader(_: &PlacedDocument, bytes: &[u8]) -> Option<(Document, Node, Rect)> {
+        let mut d = Document::new(40.0, 20.0);
+        d.layers.clear();
+        let art = Node::new(
+            NodeId(50),
+            NodeKind::Image(ImageObject { key: "pic".into(), width: 1, height: 1, xf: Affine::IDENTITY, link: None, placement: Default::default() }),
+        );
+        d.symbols.push(Symbol { name: "Star".into(), art: Arc::new(art) });
+        d.images.insert("pic".into(), ImageBlob::new("image/png", vec![1, 2, 3]));
+        let mut children = vec![Arc::new(Node::new(NodeId(51), NodeKind::SymbolInstance { symbol: "Star".into(), xf: Affine::IDENTITY }))];
+        if bytes.starts_with(b"nest") {
+            d.images.insert("inner".into(), ImageBlob::new("application/json", b"leaf".to_vec()));
+            let inner = PlacedDocument { key: "inner".into(), width: 10.0, height: 10.0, xf: Affine::IDENTITY, ..placed("inner") };
+            children.push(Arc::new(Node::new(NodeId(52), NodeKind::PlacedDocument(Box::new(inner)))));
+        }
+        Some((d, Node::new(NodeId(0), NodeKind::Group { children, clip: false }), Rect::new(0.0, 0.0, 40.0, 20.0)))
+    }
+
+    #[test]
+    fn round_trips_through_json() {
+        let n = Node::new(NodeId(3), NodeKind::PlacedDocument(Box::new(placed("doc1-1"))));
+        let v = serde_json::to_value(&n).unwrap();
+        assert_eq!(v["kind"]["type"], "placeddocument");
+        assert_eq!(v["kind"]["link"]["path"], "/art/logo.vectorcraft");
+        let back: Node = serde_json::from_value(v).unwrap();
+        assert_eq!(back, n);
+        assert_eq!(key_for("img00", 2, true), "img00-2b");
+    }
+
+    #[test]
+    fn the_art_and_its_resources_join_only_a_prepared_copy_under_their_own_names() {
+        set_loader(stub_loader);
+        let mut d = Document::new(200.0, 200.0);
+        d.symbols.push(Symbol { name: "Star".into(), art: Arc::new(Node::new(NodeId(60), NodeKind::Group { children: vec![], clip: false })) });
+        d.images.insert("doc1-1".into(), ImageBlob::new("application/json", b"nest".to_vec()));
+        let p = placed("doc1-1");
+        let layer = d.layers[0].id;
+        d.insert(Some(layer), 0, Node::new(NodeId(7), NodeKind::PlacedDocument(Box::new(p.clone())))).unwrap();
+        assert!(d.has_placed());
+        let prepared = d.with_placed_art();
+        let names: Vec<&str> = prepared.symbols.iter().map(|s| s.name.as_str()).collect();
+        // The placed document inside is read too, its resources under its own names.
+        assert_eq!(names, ["Star", "placed:doc1-1/Star", "placed:placed:doc1-1/inner/Star"]);
+        assert!(prepared.images.contains_key("placed:doc1-1/pic"));
+        assert_eq!(d.symbols.len(), 1, "the document itself is unchanged");
+        // The art: a group of the drawing, its resources renamed.
+        let n = d.node(NodeId(7)).unwrap();
+        let art = p.art(n);
+        let [g] = &art[..] else { panic!("{art:?}") };
+        let mut refs = vec![];
+        g.walk(&mut |c| match &c.kind {
+            NodeKind::SymbolInstance { symbol, .. } => refs.push(symbol.clone()),
+            NodeKind::PlacedDocument(q) => {
+                // Its 10×10 box at the file's origin, scaled ×2 into the box at (10, 10).
+                assert_eq!(q.bounds(), Rect::new(10.0, 10.0, 30.0, 30.0));
+                refs.push(q.key.clone())
+            }
+            _ => {}
+        });
+        assert_eq!(refs, ["placed:doc1-1/Star", "placed:doc1-1/inner"]);
+        // For older apps: plain groups all the way down.
+        let mut older = prepared.clone().into_owned();
+        older.placed_as_groups();
+        assert!(!older.has_placed());
+        let mut saved = prepared.into_owned();
+        saved.drop_placed_resources();
+        assert_eq!((saved.symbols.len(), saved.images.len()), (1, 1));
+    }
+
+    #[test]
+    fn more_files_than_the_cache_holds_all_draw() {
+        set_loader(stub_loader);
+        let mut d = Document::new(200.0, 200.0);
+        let layer = d.layers[0].id;
+        let n = CACHE_SIZE + 10;
+        for i in 0..n {
+            let key = format!("many{i}-1");
+            d.images.insert(key.clone(), ImageBlob::new("application/json", format!("doc {i}").into_bytes()));
+            d.insert(Some(layer), i, Node::new(NodeId(100 + i as u64), NodeKind::PlacedDocument(Box::new(placed(&key))))).unwrap();
+        }
+        let _prepared = d.with_placed_art();
+        let mut empty = 0;
+        d.visit_placed(|n, p| empty += usize::from(p.art(n).is_empty()));
+        assert_eq!(empty, 0, "every file of the document is kept read");
+    }
+
+    #[test]
+    fn a_file_that_cant_be_read_shows_its_preview() {
+        set_loader(stub_loader);
+        let mut png = vec![];
+        image::RgbaImage::from_pixel(8, 4, image::Rgba([0, 200, 0, 255]))
+            .write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png)
+            .unwrap();
+        let mut blob = ImageBlob::new("image/png", png);
+        blob.proxy = Some(blob.bytes.clone());
+        let mut d = Document::new(200.0, 200.0);
+        d.images.insert("gone-1".into(), blob);
+        let layer = d.layers[0].id;
+        d.insert(Some(layer), 0, Node::new(NodeId(7), NodeKind::PlacedDocument(Box::new(placed("gone-1"))))).unwrap();
+        // No file reader: only the preview can be had.
+        let prepared = d.with_placed_art();
+        assert!(prepared.images.contains_key("placed:gone-1/preview"));
+        let n = d.node(NodeId(7)).unwrap();
+        let NodeKind::PlacedDocument(p) = &n.kind else { panic!("not a placed document") };
+        let art = p.art(n);
+        assert_eq!(art.first().and_then(Node::geometric_bounds), Some(Rect::new(10.0, 10.0, 90.0, 50.0)));
+    }
+}

crates/doc/src/shaper.rs

@@ -0,0 +1,41 @@
+//! Persistent Shaper edits over retained source paths. Source indices (not document ids) keep
+//! recipes valid when a group is copied. Selector anchors use source-relative bounding boxes,
+//! so the intended face or stroke follows source art when it moves or resizes.
+use crate::Appearance;
+use serde::{Deserialize, Serialize};
+use vectorcraft_geom::Point;
+
+pub const SOURCES: &str = "Shaper Sources";
+pub const FILL_PREFIX: &str = "Shaper Fill ";
+pub const STROKE_PREFIX: &str = "Shaper Stroke ";
+
+#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
+pub struct ShaperSpec {
+    pub faces: Vec<FaceEdit>,
+    pub edges: Vec<EdgeEdit>,
+}
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct FaceSelector {
+    pub sources: Vec<usize>,
+    pub anchor: Point,
+}
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct FaceEdit {
+    pub selector: FaceSelector,
+    pub erase: bool,
+    pub erase_edges: bool,
+    pub paint_source: Option<usize>,
+    pub merge: Option<u64>,
+    pub paint: Option<Appearance>,
+}
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct EdgeEdit {
+    pub source: usize,
+    pub sides: [Vec<usize>; 2],
+    pub anchor: Point,
+    pub erase: bool,
+    pub paint: Option<Appearance>,
+}

crates/doc/src/text.rs

@@ -285,6 +285,24 @@ fn default_align_on() -> char {
 /// Distance between default tab stops when no explicit stop applies (½ inch).
 pub const DEFAULT_TAB_INTERVAL: f64 = 36.0;
 
+/// Paragraph composer (Paragraph panel menu): how lines are broken.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub enum Composer {
+    /// Break each line as soon as it is full.
+    SingleLine,
+    /// Total fit over the whole paragraph (Illustrator's default): justified lines get even word
+    /// spacing, ragged lines an even rag.
+    #[default]
+    EveryLine,
+}
+
+impl Composer {
+    fn is_default(&self) -> bool {
+        *self == Self::default()
+    }
+}
+
 /// Paragraph attributes (the Paragraph panel).
 ///
 /// Saved through [`ParaStyleFile`], which keeps files with text openable by builds from before
@@ -299,6 +317,8 @@ pub struct ParaStyle {
     pub space_before: f64,
     pub space_after: f64,
     pub hyphenate: bool,
+    /// Line breaking: Single-line or Every-line Composer.
+    pub composer: Composer,
     /// Tab stops (Tabs panel), sorted by position.
     pub tabs: Vec<TabStop>,
     /// Paragraph style (Paragraph Styles panel) these attributes come from; None = Normal.
@@ -341,6 +361,8 @@ struct ParaStyleFile {
     space_after: f64,
     #[serde(default)]
     hyphenate: bool,
+    #[serde(default, skip_serializing_if = "Composer::is_default")]
+    composer: Composer,
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     tabs: Vec<TabStop>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -370,6 +392,7 @@ impl From<ParaStyle> for ParaStyleFile {
             space_before,
             space_after,
             hyphenate,
+            composer,
             tabs,
             style_name,
             mojikumi,
@@ -387,6 +410,7 @@ impl From<ParaStyle> for ParaStyleFile {
             space_before,
             space_after,
             hyphenate,
+            composer,
             tabs,
             style_name,
             mojikumi,
@@ -407,6 +431,7 @@ impl From<ParaStyleFile> for ParaStyle {
             space_before,
             space_after,
             hyphenate,
+            composer,
             tabs,
             style_name,
             mojikumi,
@@ -423,6 +448,7 @@ impl From<ParaStyleFile> for ParaStyle {
             space_before,
             space_after,
             hyphenate,
+            composer,
             tabs,
             style_name,
             mojikumi,
@@ -506,6 +532,34 @@ pub enum FirstBaseline {
     Fixed,
 }
 
+/// Area Type Options "Align" (vertical): where the lines of each row/column sit in it.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub enum VerticalAlign {
+    /// Lines start at the top of the cell (the default).
+    #[default]
+    Top,
+    /// The block of lines is centred in the cell.
+    Center,
+    /// The last line's descent touches the cell bottom.
+    Bottom,
+    /// The first line stays at the top, the last one moves to the bottom and the space left over
+    /// is shared equally between the lines (no paragraph spacing limit).
+    Justify,
+}
+
+impl VerticalAlign {
+    pub const ALL: [VerticalAlign; 4] = [VerticalAlign::Top, VerticalAlign::Center, VerticalAlign::Bottom, VerticalAlign::Justify];
+    pub fn id(self) -> &'static str {
+        match self {
+            VerticalAlign::Top => "top",
+            VerticalAlign::Center => "center",
+            VerticalAlign::Bottom => "bottom",
+            VerticalAlign::Justify => "justify",
+        }
+    }
+}
+
 /// Text Wrap Options of a wrap object (Object → Text Wrap).
 #[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
 #[serde(default)]
@@ -608,11 +662,85 @@ pub struct AreaOptions {
     pub first_baseline: FirstBaseline,
     /// Minimum first-baseline offset in points.
     pub first_baseline_min: f64,
+    /// Vertical alignment of the lines in each row/column.
+    pub vertical_align: VerticalAlign,
+    /// How the frame and its text fit each other (Auto Size, Shrink Text to Fit).
+    #[serde(skip_serializing_if = "crate::skip::is_default")]
+    pub fit: AreaFit,
 }
 
 impl Default for AreaOptions {
     fn default() -> Self {
-        Self { rows: 1, columns: 1, gutter: 18.0, inset: 0.0, first_baseline: FirstBaseline::Ascent, first_baseline_min: 0.0 }
+        Self {
+            rows: 1,
+            columns: 1,
+            gutter: 18.0,
+            inset: 0.0,
+            first_baseline: FirstBaseline::Ascent,
+            first_baseline_min: 0.0,
+            vertical_align: VerticalAlign::Top,
+            fit: AreaFit::None,
+        }
+    }
+}
+
+/// How area type and its frame fit each other. Serialized as `"none"`, `"autoHeight"` or
+/// `{"shrinkText": {"minPercent": 50}}`.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub enum AreaFit {
+    /// The frame keeps its size; text that doesn't fit overflows.
+    #[default]
+    None,
+    /// The frame's height follows the text (Illustrator's Auto Size): resolved by the engine after
+    /// each edit, for rectangular frames of horizontal type in one row.
+    AutoHeight,
+    /// Text that overflows is scaled down (size, leading and baseline shift; not paragraph
+    /// spacing) by the largest factor down to `min_percent` % that makes it fit, at layout time.
+    ShrinkText {
+        #[serde(rename = "minPercent", default = "AreaFit::default_min_percent")]
+        min_percent: f64,
+    },
+}
+
+impl AreaFit {
+    /// The smallest Shrink Text to Fit percentage allowed.
+    pub const MIN_PERCENT: f64 = 10.0;
+    /// The Shrink Text to Fit percentage new settings start with.
+    pub const DEFAULT_MIN_PERCENT: f64 = 50.0;
+    fn default_min_percent() -> f64 {
+        Self::DEFAULT_MIN_PERCENT
+    }
+    /// Its id: `none`, `autoHeight` or `shrinkText`.
+    pub fn id(self) -> &'static str {
+        match self {
+            AreaFit::None => "none",
+            AreaFit::AutoHeight => "autoHeight",
+            AreaFit::ShrinkText { .. } => "shrinkText",
+        }
+    }
+    /// The fit an id names (case, spaces, dashes and underscores ignored), with `min_percent`
+    /// for Shrink Text (clamped to 10..100; a non-finite value gives the default).
+    pub fn parse(id: &str, min_percent: Option<f64>) -> Option<Self> {
+        match id.to_ascii_lowercase().replace([' ', '-', '_'], "").as_str() {
+            "none" | "off" => Some(AreaFit::None),
+            "autoheight" | "autosize" => Some(AreaFit::AutoHeight),
+            "shrinktext" | "shrinktexttofit" | "shrink" => {
+                Some(AreaFit::ShrinkText { min_percent: Self::clamp_percent(min_percent.unwrap_or(Self::DEFAULT_MIN_PERCENT)) })
+            }
+            _ => None,
+        }
+    }
+    /// A Shrink Text minimum percentage within 10..100 (the default when not finite).
+    pub fn clamp_percent(p: f64) -> f64 {
+        if p.is_finite() { p.clamp(Self::MIN_PERCENT, 100.0) } else { Self::DEFAULT_MIN_PERCENT }
+    }
+    /// Shrink Text's minimum scale factor (0.1..1), if this is Shrink Text.
+    pub fn min_scale(self) -> Option<f64> {
+        match self {
+            AreaFit::ShrinkText { min_percent } => Some(Self::clamp_percent(min_percent) / 100.0),
+            _ => None,
+        }
     }
 }
 
@@ -684,6 +812,11 @@ fn reverse_from_end(path: &mut PathData) {
 }
 
 /// A text object. `runs` split into paragraphs at `\n`.
+///
+/// Paragraph attributes: `para` is paragraph 0's (and, while `paras` is empty, every
+/// paragraph's). Invariant (kept by [`TextObject::normalize_paras`]): `paras` is either empty —
+/// every paragraph uses `para` — or holds one style per paragraph with `paras[0] == para` and at
+/// least two different styles. Readers that only know `para` see the first paragraph's style.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TextObject {
     /// Top-to-bottom, right-to-left writing. Defaults to horizontal for old documents.
@@ -695,6 +828,9 @@ pub struct TextObject {
     pub runs: Vec<TextRun>,
     #[serde(default)]
     pub para: ParaStyle,
+    /// Per-paragraph attributes (see the type's docs); empty = every paragraph uses `para`.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub paras: Vec<ParaStyle>,
     /// Area Type Options (area type only).
     #[serde(default, skip_serializing_if = "crate::skip::is_default")]
     pub area: AreaOptions,
@@ -729,6 +865,7 @@ impl TextObject {
             xf: Affine::translate(origin.to_vec2()),
             runs: vec![TextRun { text: text.into(), style }],
             para: ParaStyle::default(),
+            paras: Vec::new(),
             area: AreaOptions::default(),
             path_effect: PathEffect::default(),
             path_align: PathAlign::default(),
@@ -741,6 +878,103 @@ impl TextObject {
     pub fn plain_text(&self) -> String {
         self.runs.iter().map(|r| r.text.as_str()).collect()
     }
+    /// Number of paragraphs (`\n`-separated; empty text has one).
+    pub fn paragraph_count(&self) -> usize {
+        1 + self.runs.iter().map(|r| r.text.bytes().filter(|&b| b == b'\n').count()).sum::<usize>()
+    }
+    /// Attributes of paragraph `i` (the last paragraph's past the end).
+    pub fn para_at(&self, i: usize) -> &ParaStyle {
+        self.paras.get(i).or(self.paras.last()).unwrap_or(&self.para)
+    }
+    /// Every paragraph's attributes, one per paragraph.
+    pub fn paragraph_styles(&self) -> Vec<ParaStyle> {
+        (0..self.paragraph_count()).map(|i| self.para_at(i).clone()).collect()
+    }
+    /// Set every paragraph's attributes from `styles` (one per paragraph; a short list repeats its
+    /// last entry, a long one is cut).
+    pub fn set_paragraph_styles(&mut self, styles: Vec<ParaStyle>) {
+        if let Some(first) = styles.first() {
+            self.para = first.clone();
+        }
+        self.paras = styles;
+        self.normalize_paras();
+    }
+    /// The same attributes for every paragraph.
+    pub fn set_all_paras(&mut self, style: ParaStyle) {
+        self.para = style;
+        self.paras.clear();
+    }
+    /// Re-establish the `paras` invariant: one entry per paragraph (cut, or extended with the
+    /// last), `paras[0] == para`, and empty when every paragraph is alike.
+    pub fn normalize_paras(&mut self) {
+        if self.paras.is_empty() {
+            return;
+        }
+        let n = self.paragraph_count();
+        let last = self.paras.last().cloned().unwrap_or_default();
+        self.paras.resize(n, last);
+        if let Some(first) = self.paras.first_mut() {
+            first.clone_from(&self.para);
+        }
+        if self.paras.iter().all(|p| *p == self.para) {
+            self.paras.clear();
+        }
+    }
+    /// Indices of the paragraphs that byte range `start..end` of the plain text touches (a caret
+    /// touches its paragraph).
+    pub fn paragraphs_in(&self, start: usize, end: usize) -> std::ops::Range<usize> {
+        let text = self.plain_text();
+        let (a, b) = (start.min(end).min(text.len()), start.max(end).min(text.len()));
+        let index = |byte: usize| text.as_bytes().get(..byte).map_or(0, |s| s.iter().filter(|&&c| c == b'\n').count());
+        index(a)..index(b) + 1
+    }
+    /// Apply `f` to the attributes of paragraphs `range` (indices; None = every paragraph).
+    pub fn edit_paras(&mut self, range: Option<std::ops::Range<usize>>, mut f: impl FnMut(&mut ParaStyle)) {
+        match range {
+            None => {
+                f(&mut self.para);
+                for p in &mut self.paras {
+                    f(p);
+                }
+            }
+            Some(r) => {
+                let mut v = self.paragraph_styles();
+                for p in v.iter_mut().take(r.end).skip(r.start) {
+                    f(p);
+                }
+                self.set_paragraph_styles(v);
+            }
+        }
+        self.normalize_paras();
+    }
+    /// Every stored paragraph style (`para` and the per-paragraph ones), for scans and renames.
+    pub fn para_styles_mut(&mut self) -> impl Iterator<Item = &mut ParaStyle> {
+        std::iter::once(&mut self.para).chain(self.paras.iter_mut())
+    }
+    /// Every stored paragraph style (`para` and the per-paragraph ones).
+    pub fn para_styles(&self) -> impl Iterator<Item = &ParaStyle> {
+        std::iter::once(&self.para).chain(self.paras.iter())
+    }
+    /// Update the paragraph styles for replacing bytes `start..end` of the current plain text by
+    /// `insert` (call before changing the runs). The paragraph the range starts in keeps its
+    /// style (merging paragraphs: the first one's wins); paragraphs the insertion starts take that
+    /// style too (Return continues the paragraph it splits); later paragraphs keep theirs.
+    pub fn splice_paras(&mut self, start: usize, end: usize, insert: &str) {
+        if self.paras.is_empty() {
+            return;
+        }
+        let r = self.paragraphs_in(start, end);
+        let v = self.paragraph_styles();
+        let Some(keep) = v.get(r.start).cloned() else { return };
+        let added = insert.bytes().filter(|&b| b == b'\n').count();
+        let mut out: Vec<ParaStyle> = v.iter().take(r.start + 1).cloned().collect();
+        out.extend(std::iter::repeat_n(keep, added));
+        out.extend(v.iter().skip(r.end).cloned());
+        self.paras = out;
+        if let Some(first) = self.paras.first() {
+            self.para = first.clone();
+        }
+    }
     pub fn first_style(&self) -> CharStyle {
         self.runs.first().map(|r| r.style.clone()).unwrap_or_default()
     }
@@ -868,6 +1102,56 @@ mod tests {
         assert_eq!(CharStyle::default().effective_leading(), 14.399999999999999);
     }
 
+    fn justified(j: Justify) -> ParaStyle {
+        ParaStyle { justify: j, ..ParaStyle::default() }
+    }
+
+    #[test]
+    fn paragraph_styles_split_merge_and_normalize() {
+        let mut t = TextObject::point(Point::ZERO, "one\ntwo\nthree", CharStyle::default());
+        assert_eq!((t.paragraph_count(), t.paras.len()), (3, 0), "one style for all: nothing stored");
+        assert_eq!(t.paragraphs_in(0, 0), 0..1);
+        assert_eq!(t.paragraphs_in(4, 4), 1..2);
+        assert_eq!(t.paragraphs_in(2, 9), 0..3);
+        assert_eq!(t.paragraphs_in(99, 99), 2..3, "clamped to the text");
+        t.edit_paras(Some(1..2), |p| p.justify = Justify::Center);
+        let js = |t: &TextObject| t.paragraph_styles().iter().map(|p| p.justify).collect::<Vec<_>>();
+        assert_eq!(js(&t), [Justify::Left, Justify::Center, Justify::Left]);
+        // Return inside "two": the new paragraph continues its style.
+        t.splice_paras(5, 5, "\n");
+        t.runs[0].text.insert(5, '\n');
+        assert_eq!(js(&t), [Justify::Left, Justify::Center, Justify::Center, Justify::Left]);
+        // Deleting the break between "one" and "t": the first paragraph's style wins.
+        t.splice_paras(3, 4, "");
+        t.runs[0].text.remove(3);
+        assert_eq!(t.plain_text(), "onet\nwo\nthree");
+        assert_eq!(js(&t), [Justify::Left, Justify::Center, Justify::Left]);
+        // An edit that skips the splice is repaired by normalizing (the last style continues).
+        t.runs[0].text.push_str("\nfour");
+        t.normalize_paras();
+        assert_eq!(js(&t), [Justify::Left, Justify::Center, Justify::Left, Justify::Left]);
+        // `para` is paragraph 0's; all alike collapses to `para` alone.
+        t.edit_paras(Some(0..1), |p| p.justify = Justify::Right);
+        assert_eq!(t.para.justify, Justify::Right);
+        t.edit_paras(None, |p| p.justify = Justify::Right);
+        assert!(t.paras.is_empty() && t.para.justify == Justify::Right);
+        // A short list repeats its last entry, a long one is cut.
+        t.set_paragraph_styles(vec![justified(Justify::Left), justified(Justify::Center)]);
+        assert_eq!(js(&t), [Justify::Left, Justify::Center, Justify::Center, Justify::Center]);
+        t.set_paragraph_styles(vec![justified(Justify::Center); 9]);
+        assert!(t.paras.is_empty() && t.para.justify == Justify::Center);
+        // Old documents (no `paras`) load; new ones keep paragraph 0 in `para`.
+        t.edit_paras(Some(3..4), |p| p.space_before = 4.0);
+        let json = serde_json::to_value(&t).unwrap();
+        assert_eq!(json["para"]["justify"], json["paras"][0]["justify"]);
+        let mut old = json.clone();
+        old.as_object_mut().unwrap().remove("paras");
+        let back: TextObject = serde_json::from_value(old).unwrap();
+        assert!(back.paras.is_empty() && back.para_at(3).justify == Justify::Center);
+        let back: TextObject = serde_json::from_value(json).unwrap();
+        assert_eq!(back.para_at(3).space_before, 4.0);
+    }
+
     /// 120 × 40 area type at (40, 40), its text drawn at twice its size.
     fn area_type() -> TextObject {
         let mut t = TextObject::point(Point::ZERO, "Some text", CharStyle::default());

crates/effects/src/bake.rs

@@ -324,14 +324,19 @@ pub fn bake_appearance(n: &Node) -> Option<Node> {
     Some(m)
 }
 
-/// A copy of `doc` with every live geometry effect baked into plain paths, or `None` when the
-/// document has none (export it as is).
+/// A copy of `doc` ready to export: every live geometry effect baked into plain paths, and the
+/// resources of its placed documents' art added ([`Document::with_placed_art`]); `None` when
+/// there is nothing to do (export it as is).
 pub fn bake_document(doc: &Document) -> Option<Document> {
-    if !doc.layers.iter().any(|l| needs_bake(l)) {
-        return None;
+    let placed = doc.with_placed_art();
+    if !placed.layers.iter().any(|l| needs_bake(l)) {
+        return match placed {
+            std::borrow::Cow::Owned(d) => Some(d),
+            std::borrow::Cow::Borrowed(_) => None,
+        };
     }
-    let mut d = doc.clone();
-    let layers = doc.layers.clone();
+    let mut d = placed.into_owned();
+    let layers = d.layers.clone();
     d.layers = layers.iter().map(|l| bake_node(&mut d, l).map(Arc::new).unwrap_or_else(|| l.clone())).collect();
     Some(d)
 }

crates/effects/src/reshape.rs

@@ -26,6 +26,7 @@ pub fn needs_outline(n: &Node) -> bool {
             | NodeKind::Envelope { .. }
             | NodeKind::Mesh(_)
             | NodeKind::Repeat(_)
+            | NodeKind::PlacedDocument(_)
     )
 }
 

crates/engine/src/cmd/appearance.rs

@@ -803,9 +803,10 @@ impl Picked {
                 run_attrs(&mut r.style, &placed, ap);
             }
             if let Some((_, para)) = text.filter(|_| a.paragraph) {
-                t.para = para.clone();
+                // The source's first paragraph's attributes, on every paragraph.
+                t.set_all_paras(para.clone());
             }
-            if text.is_some() && a.character {
+            if text.is_some() && (a.character || a.paragraph) {
                 super::typecmd::refresh_bounds(t);
             }
             return;

crates/engine/src/cmd/buildcmds.rs

@@ -250,7 +250,8 @@ fn sb_merge(s: &mut Session, p: &Value) -> Result<Value> {
         // Edges come back from the planar map within a few hundredths of the outlines they follow.
         let cut_tol = step * 0.2;
         let picked: Vec<&po::Region> = touched.regions.iter().filter_map(|&i| map.regions.get(i).map(|r| &r.0)).collect();
-        let union = if picked.is_empty() { PathData::default() } else { po::merge_regions(&picked) };
+        let faces = po::FaceMerger::new(&map.shapes);
+        let union = if picked.is_empty() { PathData::default() } else { faces.merge(&picked) };
         // The merged shape takes the look of the front-most object over the first region, or (for an
         // area only lines enclose) of the front-most object and the current fill.
         let covered = picked.iter().find_map(|r| r.top());
@@ -278,7 +279,17 @@ fn sb_merge(s: &mut Session, p: &Value) -> Result<Value> {
                 // its outline, shared edges from every shape along them).
                 let in_union = picked.iter().any(|r| r.sources.contains(&i));
                 let mut rest = if in_union {
-                    po::boolean(&sh.path, sh.rule, &union, FillRule::NonZero, po::BoolOp::Difference)
+                    // What is left of it: its faces not merged or deleted, united. They share their
+                    // edges with the merged faces exactly, where subtracting the merged shape left
+                    // slivers of the outline along them (#569).
+                    let kept: Vec<&po::Region> = map
+                        .regions
+                        .iter()
+                        .enumerate()
+                        .filter(|(k, (r, ..))| r.sources.contains(&i) && !touched.regions.contains(k))
+                        .map(|(_, (r, ..))| r)
+                        .collect();
+                    if kept.is_empty() { PathData::default() } else { faces.merge(&kept) }
                 } else {
                     b::node_outline(leaf).map_or_else(|| sh.path.clone(), |o| o.0)
                 };
@@ -640,6 +651,11 @@ fn trace_params(p: &Value) -> Result<tr::TraceParams> {
     serde_json::from_value(v).map_err(|e| bad("imageTrace.make", e.to_string()))
 }
 
+/// The most anchor points an Image Trace may make: a photo traced at high fidelity can make
+/// millions, more than the canvas draws smoothly or a laptop has memory for, so the trace is
+/// refused with advice instead (#525).
+pub const MAX_TRACE_ANCHORS: usize = 2_000_000;
+
 fn trace_make(s: &mut Session, p: &Value, expand: bool) -> Result<Value> {
     const C: &str = "imageTrace.make";
     let params = trace_params(p)?;
@@ -671,7 +687,7 @@ fn trace_make(s: &mut Session, p: &Value, expand: bool) -> Result<Value> {
     };
     let blob = s.doc()?.doc.images.get(&img.key).ok_or_else(|| EngineError::Other(format!("image data `{}` is missing", img.key)))?;
     let raster = tr::Raster::decode(&blob.bytes).map_err(|e| EngineError::Other(e.to_string()))?;
-    let res = tr::trace(&raster, &params);
+    let res = tr::trace_within(&raster, &params, MAX_TRACE_ANCHORS).map_err(|e| EngineError::Other(e.to_string()))?;
     // Pixel space of the decoded raster → the image object's pixel space → document.
     let sx = img.width.max(1) as f64 / raster.width.max(1) as f64;
     let sy = img.height.max(1) as f64 / raster.height.max(1) as f64;

crates/engine/src/cmd/clipboard.rs

@@ -21,7 +21,7 @@ use vectorcraft_color::Swatch;
 use vectorcraft_doc::{Document, GraphicStyle, ImageBlob, Node, NodeId, PatternDef, Symbol, TextStyleDef};
 use vectorcraft_geom::Rect;
 
-pub use flavours::{BITMAP, EMF, FILE_HEAD, Flavour, PASTE_ORDER, PDF, PNG, SVG, TEXT, file_flavour};
+pub use flavours::{BITMAP, EMF, FILE_HEAD, Flavour, PASTE_ORDER, PDF, PNG, SVG, TEXT, file_flavour, is_address};
 pub(crate) use resources::SwatchChoices;
 
 use super::*;
@@ -220,6 +220,25 @@ mod tests {
         s
     }
 
+    /// The address a browser's Copy Image puts next to the picture (#597), and text that isn't one.
+    #[test]
+    fn an_address_alone_is_told_from_other_text() {
+        for a in [
+            "https://example.com/cat.png",
+            " http://x.org/a?b=1
+",
+            "HTTPS://EXAMPLE.COM",
+            "file:///C:/art/cat.png",
+            "data:image/png;base64,iVBOR",
+            "blob:https://x.org/1",
+        ] {
+            assert!(is_address(a), "{a}");
+        }
+        for t in ["Pasted words", "see https://example.com", "https://a.org https://b.org", "https://", "example.com/cat.png", ""] {
+            assert!(!is_address(t), "{t}");
+        }
+    }
+
     #[test]
     fn copy_exports_svg_that_round_trips_through_paste() {
         let mut s = session();

crates/engine/src/cmd/clipboard/flavours.rs

@@ -30,6 +30,15 @@ pub const EMF: &str = "image/emf";
 /// What Paste reads from other apps, best first: vector art before text, text before bitmaps
 /// (word processors offer a picture of copied text too).
 pub const PASTE_ORDER: [&str; 5] = [SVG, PDF, EMF, TEXT, BITMAP];
+/// Is `text` only an address (a web page's, an image's, a file's)? A browser's Copy Image puts the
+/// image's address as text next to the picture: then the picture is what Paste takes (#597). An
+/// address alone pastes as text, and nothing is fetched.
+pub fn is_address(text: &str) -> bool {
+    const SCHEMES: [&str; 6] = ["http://", "https://", "file://", "ftp://", "data:", "blob:"];
+    let t = text.trim();
+    !t.chars().any(char::is_whitespace) && SCHEMES.iter().any(|s| t.get(..s.len()).is_some_and(|h| h.eq_ignore_ascii_case(s)) && t.len() > s.len())
+}
+
 /// How much of a copied file [`file_flavour`] needs to tell what it is.
 pub const FILE_HEAD: usize = 4096;
 

crates/engine/src/cmd/clipboard/resources.rs

@@ -122,11 +122,12 @@ fn node_refs(n: &Node, f: Visit) {
                         f(Ref::Name(Res::CharStyle, s));
                     }
                 }
-                if let Some(s) = &t.para.style_name {
+                for s in t.para_styles().filter_map(|pa| pa.style_name.as_ref()) {
                     f(Ref::Name(Res::ParaStyle, s));
                 }
             }
             NodeKind::Image(im) => f(Ref::Name(Res::Image, &im.key)),
+            NodeKind::PlacedDocument(pl) => f(Ref::Name(Res::Image, &pl.key)),
             NodeKind::SymbolInstance { symbol, .. } => f(Ref::Name(Res::Symbol, symbol)),
             _ => {}
         }
@@ -439,11 +440,14 @@ impl Relink {
                         self.name(Res::CharStyle, s);
                     }
                 }
-                if let Some(s) = &mut t.para.style_name {
-                    self.name(Res::ParaStyle, s);
+                for pa in t.para_styles_mut() {
+                    if let Some(s) = &mut pa.style_name {
+                        self.name(Res::ParaStyle, s);
+                    }
                 }
             }
             NodeKind::Image(im) => self.name(Res::Image, &mut im.key),
+            NodeKind::PlacedDocument(pl) => self.name(Res::Image, &mut pl.key),
             NodeKind::SymbolInstance { symbol, .. } => self.name(Res::Symbol, symbol),
             _ => {}
         }

crates/engine/src/cmd/create.rs

@@ -9,8 +9,16 @@ use super::*;
 
 pub fn specs() -> Vec<CommandSpec> {
     vec![
-        cmd!("shape.rectangle", "Rectangle", [], None, "{x, y, width, height, radius?: pt} → {id}", has_doc, rectangle),
-        cmd!("shape.ellipse", "Ellipse", [], None, "{x, y, width, height} → {id}", has_doc, ellipse),
+        cmd!(
+            "shape.rectangle",
+            "Rectangle",
+            [],
+            None,
+            "{x, y, width, height, radius?: pt, rotation?: deg (about centre)} → {id}",
+            has_doc,
+            rectangle
+        ),
+        cmd!("shape.ellipse", "Ellipse", [], None, "{x, y, width, height, rotation?: deg (about centre)} → {id}", has_doc, ellipse),
         cmd!("shape.polygon", "Polygon", [], None, "{cx, cy, radius, sides=6, rotation?: deg} → {id}", has_doc, polygon),
         cmd!("shape.star", "Star", [], None, "{cx, cy, radius1, radius2, points=5, rotation?: deg} → {id}", has_doc, star),
         cmd!(
@@ -50,7 +58,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Create Text",
             [],
             None,
-            "{x, y, text, vertical?: bool = false, size?: pt, font?: family, style?, color?, area?: {width, height}, placeholder?: bool (fill it with placeholder text instead, as the Type tools do with prefs placeholderText), leadingModel?: \"romanBaseline\"|\"emBoxTop\", charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\" (default: emBoxTop and emBoxCenter while the interface is in Japanese, else romanBaseline)} → {id}",
+            "{x, y, text, vertical?: bool = false, size?: pt, font?: family, style?, color?, area?: {width, height, fit?: none|autoHeight|shrinkText, fitMinPercent?}, placeholder?: bool (fill it with placeholder text instead, as the Type tools do with prefs placeholderText), leadingModel?: \"romanBaseline\"|\"emBoxTop\", charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\" (default: emBoxTop and emBoxCenter while the interface is in Japanese, else romanBaseline)} → {id}; new area type gets Auto Size (fit autoHeight) when the autoSizeAreaType preference is on",
             has_doc,
             text_create
         ),
@@ -163,6 +171,17 @@ fn rect_of(p: &Value, cmd: &str) -> Result<Rect> {
     Ok(Rect::new(x, y, x + w, y + h).abs())
 }
 
+fn rect_transform(r: Rect, p: &Value, cmd: &str) -> Result<Affine> {
+    let rotation = if p.get("rotation").is_some() { f64_req(p, "rotation", cmd)? } else { 0.0 };
+    if !rotation.is_finite() {
+        return Err(bad(cmd, "rotation must be finite"));
+    }
+    if rotation == 0.0 {
+        return Ok(Affine::translate(r.origin().to_vec2()));
+    }
+    Ok(Affine::translate(r.center().to_vec2()) * Affine::rotate(rotation.to_radians()) * Affine::translate((-r.width() / 2.0, -r.height() / 2.0)))
+}
+
 fn rectangle(s: &mut Session, p: &Value) -> Result<Value> {
     let r = rect_of(p, "shape.rectangle")?;
     let radius = f64_or(p, "radius", 0.0).max(0.0);
@@ -171,7 +190,7 @@ fn rectangle(s: &mut Session, p: &Value) -> Result<Value> {
         h: r.height(),
         radii: [radius; 4],
         kinds: Default::default(),
-        xf: Affine::translate(r.origin().to_vec2()),
+        xf: rect_transform(r, p, "shape.rectangle")?,
     };
     let label = if radius > 0.0 { "Rounded Rectangle" } else { "Rectangle" };
     add_art(s, label, path_kind(live.to_path(), Some(live)), None)
@@ -179,7 +198,7 @@ fn rectangle(s: &mut Session, p: &Value) -> Result<Value> {
 
 fn ellipse(s: &mut Session, p: &Value) -> Result<Value> {
     let r = rect_of(p, "shape.ellipse")?;
-    let live = LiveShape::Ellipse { w: r.width(), h: r.height(), pie: (0.0, 360.0), xf: Affine::translate(r.origin().to_vec2()) };
+    let live = LiveShape::Ellipse { w: r.width(), h: r.height(), pie: (0.0, 360.0), xf: rect_transform(r, p, "shape.ellipse")? };
     add_art(s, "Ellipse", path_kind(live.to_path(), Some(live)), None)
 }
 
@@ -415,10 +434,12 @@ fn text_create(s: &mut Session, p: &Value) -> Result<Value> {
         let w = f64_or(a, "width", 200.0);
         let h = f64_or(a, "height", 100.0);
         t.kind = vectorcraft_doc::TextKind::Area { frame: shapes::rectangle(Rect::new(0.0, 0.0, w, h)) };
+        t.area.fit = new_area_fit(s, a, "text.create")?;
     }
     if bool_or(p, "placeholder", false) {
         super::typemenu::fill_with_placeholder(&mut t);
     } else {
+        // Lays the text out (and sizes an Auto Size frame).
         super::typecmd::refresh_bounds(&mut t);
     }
     add_node(s, "Type", NodeKind::Text(Box::new(t)), Appearance::default(), None)
@@ -471,6 +492,13 @@ pub(crate) fn new_type_alignment(s: &mut Session, p: &Value, cmd: &str, t: &mut
     Ok(())
 }
 
+/// The fit new area type gets: `fit`/`fitMinPercent` from `p` (as `text.areaOptions` takes
+/// them), else Auto Size when the "Auto Size New Area Type" preference is on.
+pub(crate) fn new_area_fit(s: &Session, p: &Value, c: &str) -> Result<vectorcraft_doc::AreaFit> {
+    let default = if s.prefs.auto_size_area_type { vectorcraft_doc::AreaFit::AutoHeight } else { vectorcraft_doc::AreaFit::None };
+    Ok(super::typecmd::fit_param(p, default, c)?.unwrap_or(default))
+}
+
 /// The character style new type gets: `size`, `font`, `style` and `color` from `p`, else the
 /// defaults, filled with the current fill unless that is None or white (black then).
 pub(crate) fn new_type_style(s: &Session, p: &Value) -> CharStyle {

crates/engine/src/cmd/distortcmds.rs

@@ -418,6 +418,7 @@ fn not_liquified(n: &Node) -> Option<&'static str> {
         NodeKind::Mesh(_) => "meshes",
         NodeKind::Envelope { .. } => "envelopes",
         NodeKind::Repeat(_) => "repeats",
+        NodeKind::PlacedDocument(_) => "placed documents",
         NodeKind::Blend { .. } => "blends",
         _ => return None,
     })

crates/engine/src/cmd/docinfo.rs

@@ -49,13 +49,14 @@ pub const CATEGORIES: [(&str, &str); 11] = [
 ];
 
 /// The object counts of `document.info` and their labels.
-const OBJECT_LABELS: [(&str, &str); 16] = [
+const OBJECT_LABELS: [(&str, &str); 17] = [
     ("paths", "Paths"),
     ("compoundPaths", "Compound Paths"),
     ("groups", "Groups"),
     ("clipGroups", "Clipping Masks"),
     ("textObjects", "Text Objects"),
     ("images", "Images"),
+    ("placedDocuments", "Placed Documents"),
     ("symbolInstances", "Symbol Instances"),
     ("gradients", "Gradient Objects"),
     ("patterns", "Pattern Objects"),
@@ -252,6 +253,7 @@ fn info(s: &mut Session, p: &Value) -> Result<Value> {
                 NodeKind::Envelope { .. } => Some("envelopes"),
                 NodeKind::Mesh(_) => Some("meshes"),
                 NodeKind::Repeat(_) => Some("repeats"),
+                NodeKind::PlacedDocument(_) => Some("placedDocuments"),
             };
             if let Some(k) = k {
                 *counts.entry(k).or_default() += 1;

crates/engine/src/cmd/expand.rs

@@ -1,6 +1,7 @@
 //! Object → Expand: live shapes, type and effects (Object), strokes (Stroke) and gradient fills
-//! (Fill) into plain art in one undo step. A linear or radial gradient fill becomes a gradient mesh,
-//! or solid strips / concentric ellipses, inside a clip group shaped like the object; a freeform
+//! (Fill) into plain art in one undo step. Placed documents (Object) become editable copies of the
+//! art they show, their resources joining the document. A linear or radial gradient fill becomes a
+//! gradient mesh, or solid strips / concentric ellipses, inside a clip group shaped like the object; a freeform
 //! gradient becomes a mesh shaped like the object. Create Gradient Mesh shares the sampling.
 
 use std::sync::Arc;
@@ -36,7 +37,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Expand…",
             ["Object"],
             None,
-            "{object?: true (type → outlines, live shapes → paths, effects baked, blends → groups of their steps, envelopes → their distorted content), fill?: true (gradient fills → `gradient` art), stroke?: true (strokes → filled outlines), gradient?: \"objects\" (default: `steps` solid strips, concentric ellipses for radial gradients) | \"mesh\" (a gradient mesh), both in a clip group shaped like the object (freeform gradients always become a mesh shaped like it), steps?: 1..1000 (255)} one undo step → {ids}",
+            "{object?: true (type → outlines, live shapes → paths, effects baked, blends → groups of their steps, envelopes → their distorted content, placed documents → editable copies of their art, as placing the file without link gives, its symbols, patterns, swatches and images joining the document), fill?: true (gradient fills → `gradient` art), stroke?: true (strokes → filled outlines), gradient?: \"objects\" (default: `steps` solid strips, concentric ellipses for radial gradients) | \"mesh\" (a gradient mesh), both in a clip group shaped like the object (freeform gradients always become a mesh shaped like it), steps?: 1..1000 (255)} one undo step → {ids}",
             has_selection,
             expand
         ),
@@ -55,6 +56,21 @@ pub fn specs() -> Vec<CommandSpec> {
     ]
 }
 
+/// Every placed document in `roots` of `d` (at any depth) replaced by an editable copy of the art it
+/// shows, keeping its id and place; the resources the art uses join `d` (a name `d` uses for
+/// something else gets a free variant).
+fn expand_placed_under(d: &mut Document, roots: &[NodeId]) -> Result<()> {
+    let mut ids = vec![];
+    for n in roots.iter().filter_map(|r| d.node(*r)) {
+        n.walk(&mut |c| {
+            if matches!(c.kind, NodeKind::PlacedDocument(_)) {
+                ids.push(c.id);
+            }
+        });
+    }
+    ids.into_iter().try_for_each(|id| super::place::document::expand(d, id, C))
+}
+
 /// Expand Gradient To.
 #[derive(Clone, Copy, Debug, PartialEq)]
 enum GradientTo {
@@ -88,6 +104,8 @@ struct Expandable {
     envelope: bool,
     /// Live blends (Object expands them into groups of their steps).
     blends: bool,
+    /// Placed documents (Object expands them into the art they show).
+    placed: bool,
 }
 
 impl Expandable {
@@ -101,6 +119,7 @@ impl Expandable {
                 e.effects |= !c.appearance.effects.is_empty();
                 e.envelope |= matches!(c.kind, NodeKind::Envelope { .. });
                 e.blends |= matches!(c.kind, NodeKind::Blend { .. });
+                e.placed |= matches!(c.kind, NodeKind::PlacedDocument(_));
                 e.stroke |= shape && !c.appearance.stroke_paint().is_none();
                 e.fill |= match &c.kind {
                     NodeKind::Text(t) => t.runs.iter().any(|r| matches!(r.style.fill, Paint::Gradient(_))),
@@ -112,7 +131,7 @@ impl Expandable {
     }
 
     fn object(&self) -> bool {
-        self.text || self.live || self.effects || self.envelope || self.blends
+        self.text || self.live || self.effects || self.envelope || self.blends || self.placed
     }
 }
 
@@ -135,6 +154,11 @@ fn expand(s: &mut Session, p: &Value) -> Result<Value> {
     let from = s.doc()?.history.undo.len();
     let rev0 = s.doc()?.revision;
     let e = Expandable::of(&s.doc()?.doc, &selected_roots(s)?);
+    // Placed documents first: their art (type, strokes, gradients) expands below.
+    if object && e.placed {
+        let roots = selected_roots(s)?;
+        s.edit("Expand", |d, _| expand_placed_under(d, &roots))?;
+    }
     // Blends first: what their steps hold (type, effects, strokes, gradients) expands below.
     if object && e.blends {
         let roots = selected_roots(s)?;

crates/engine/src/cmd/fileio/encode.rs

@@ -364,6 +364,22 @@ pub fn encode_with_warnings(doc: &Document, format: &str, p: &Value) -> Result<(
 
 /// [`encode`], with every file the export writes.
 pub fn encode_all(doc: &Document, format: &str, p: &Value) -> Result<Encoded> {
+    // Placed documents output their files' art (a native file keeps what it keeps: see
+    // `native::encode`).
+    if !matches!(format, "vectorcraft" | "template") {
+        let (full, warnings) = crate::cmd::place::document::full_documents(doc);
+        if !warnings.is_empty() {
+            let mut enc = encode_all_of(&full, format, p)?;
+            enc.warnings.extend(warnings);
+            return Ok(enc);
+        }
+        return encode_all_of(&full, format, p);
+    }
+    encode_all_of(doc, format, p)
+}
+
+/// [`encode_all`] of `doc` as it is.
+fn encode_all_of(doc: &Document, format: &str, p: &Value) -> Result<Encoded> {
     let f = super::writable(C, Some(format), None)?;
     let mut enc = encode_files(doc, f, p)?;
     // Formats that draw type: missing fonts come out in the fallback font (PDF and SVG say so
@@ -401,6 +417,12 @@ fn encode_files(doc: &Document, f: &Format, p: &Value) -> Result<Encoded> {
         "txt" => super::text::encode(doc, p)?,
         "svg" | "svgz" => return super::svg::encode(doc, p, f.id == "svgz").map_err(|e| bad(C, e)),
         "dxf" => return super::dxf::encode(doc, p, use_artboards),
+        // As Save As writes it (a PDF of every artboard carrying the native document).
+        "ai" => {
+            let mut q = p.clone();
+            super::save::ai_params(&mut q);
+            return super::save::encode_ai(C, f, doc, &q);
+        }
         // EPS reads its own `useArtboards` (the art's bounds unless asked).
         "eps" => return super::eps::encode(doc, p),
         "emf" => return super::metafile::encode(doc, p, use_artboards, vectorcraft_metafile::Kind::Emf),

crates/engine/src/cmd/fileio/export.rs

@@ -87,6 +87,26 @@ fn selected_part(n: &Node, keep: &HashSet<NodeId>) -> Option<Node> {
     Some(out)
 }
 
+/// `doc` with only the art over `rect` (an artboard): objects whose visual bounds miss it are left
+/// out, at any depth of layers and sublayers, and objects that reach it stay whole (the file's
+/// bounds clip them), as DXF's crop leaves them. A clipping layer keeps every object, its clipping
+/// path among them. An artboard's file then holds its own art, not a whole document of artboards.
+pub(super) fn art_over(doc: &Document, rect: vectorcraft_geom::Rect) -> Document {
+    fn kept(n: &Arc<Node>, rect: vectorcraft_geom::Rect) -> Option<Arc<Node>> {
+        if matches!(n.kind, NodeKind::Layer { clip: false, .. }) {
+            let mut layer = Node::clone(n);
+            let children = layer.children_mut()?;
+            *children = children.iter().filter_map(|c| kept(c, rect)).collect();
+            return Some(Arc::new(layer));
+        }
+        let over = |b: vectorcraft_geom::Rect| b.x0 <= rect.x1 && rect.x0 <= b.x1 && b.y0 <= rect.y1 && rect.y0 <= b.y1;
+        n.visual_bounds().is_none_or(over).then(|| n.clone())
+    }
+    let mut d = doc.clone();
+    d.layers = doc.layers.iter().filter_map(|l| kept(l, rect)).collect();
+    d
+}
+
 /// `p` without its artboard choice, also inside its SVG options (for documents made of one
 /// synthetic artboard, and for callers that pick the artboard themselves).
 pub(super) fn without_artboards(p: &Value) -> Value {

crates/engine/src/cmd/fileio/mod.rs

@@ -465,8 +465,8 @@ pub const FORMATS: &[Format] = &[
         extensions: &["ai"],
         mime: "application/pdf",
         read: true,
-        // Saved (Save As), not exported.
-        write: false,
+        // Save As writes it; exports write the same file.
+        write: true,
         raster: false,
         options: native::AI_OPTIONS,
     },

crates/engine/src/cmd/fileio/native.rs

@@ -127,6 +127,13 @@ pub(super) fn save_options(cmd: &str, f: &Format, doc: &Document, p: &Value) ->
 /// The `.vectorcraft` file of `doc` with the options in `p`.
 pub(super) fn encode(cmd: &str, f: &Format, doc: &Document, p: &Value) -> Result<Vec<u8>> {
     let (mut so, extras) = save_options(cmd, f, doc, p)?;
+    // Include Linked Files keeps placed documents' files; older versions get their art.
+    let full = if so.include_linked || so.version < vectorcraft_format::VERSION {
+        crate::cmd::place::document::full_documents(doc).0
+    } else {
+        std::borrow::Cow::Borrowed(doc)
+    };
+    let doc = &*full;
     if extras.preview {
         so.preview = preview_png(doc)?;
     }

crates/engine/src/cmd/fileio/pdf.rs

@@ -86,7 +86,7 @@ pub(super) const OPTIONS: &[FormatOption] = &[
         name: "createLayers",
         ty: "boolean",
         default: "false",
-        description: "top-level layers as PDF layers (optional content groups with their visibility, print state and lock; PDF 1.5 or later)",
+        description: "layers and sublayers as PDF layers (optional content groups with their visibility, print state and lock, sublayers listed under their layers; PDF 1.5 or later)",
     },
     FormatOption {
         name: "flattenerPreset",
@@ -109,7 +109,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export PDF",
             [],
             None,
-            "{path?, preset?: \"VectorCraft Default\" (built-in or saved: pdf.preset.list), artboard? | artboards?: [i…] | range?: \"1-3, 5\" (1-based; default all, one page each), standard?: none|pdfA2b|pdfX1a (CMYK, grey and spot colours only: colours and images converted to output.destination or the CMYK output intent, untagged; transparency flattened with flattenerPreset; PDF 1.3)|pdfX3 (colours ICC-tagged; transparency flattened; PDF 1.3)|pdfX4 (transparency and layers kept; colours ICC-tagged; PDF 1.6 at most) (PDF/X: a /GTS_PDFX output intent, by default the CMYK profile in effect, embedded; TrimBox, Trapped, GTS_PDFXVersion, title and dates; fonts embedded or outlined), compatibility?: 1.3 (no transparency: it is flattened with flattenerPreset; images keep no see-through pixels)|1.4|1.5|1.6|1.7 (default)|2.0 (choosing a standard sets its version: 1.7 for pdfA2b, 1.6 for pdfX4, 1.3 for pdfX1a and pdfX3, which write 1.4 as 1.3 too; pdfA2b refuses 1.3), preserveEditing? (on in VectorCraft Default: the native document as an embedded file, which document.open restores; choosing a standard turns it off, a standard refuses it), thumbnails? (each page drawn as a /Thumb image, 106 px on its long side), fastWebView? (a linearised file: the first page shows while the rest downloads; it stays linearised when encrypted), viewAfterSaving? (the app opens the written file), createLayers? (each top-level layer but template layers as a PDF layer, an optional content group: hidden layers off, non-printing ones /PrintState /OFF, locked ones locked; needs 1.5 or later; they reopen as layers; choosing pdfX1a or pdfX3 turns it off; they refuse it), includeNonPrinting? (keep layers whose Print option is off; left out by default unless createLayers), flattenerPreset?: \"\" (High Resolution) | high | medium | low | a saved preset (flattener.presets.list): what PDF 1.3 files flatten transparency with, flattener?: {object.flattenTransparency options over it}, compression?: {color?, gray?: {downsample: none|average|subsample|bicubic, ppi: 300, abovePpi: 450, compression: none|zip|jpeg|jpeg2000|auto, quality: minimum|low|medium|high|maximum}, mono?: {downsample, ppi: 1200, abovePpi: 1800, compression: none|ccittG3|ccittG4|zip|runLength} (black-and-white images), compressText?: true} (images above abovePpi are resampled to ppi; auto keeps JPEGs JPEG, the others lossless; JPEG needs opaque images; none, jpeg2000, CCITT and runLength are written as ZIP with a warning), marks?: {trim, registration, colorBars, pageInfo, kind: roman|japanese, weight: 0.25 (trim marks and targets), offset: 6 (pt from the artboard, at least the bleed)} (printer's marks in [Registration], every plate: trim marks, registration targets mid-side, CMYK/spot/black-tint colour bars on top, page information (title, artboard, date UTC) below), bleed?: {useDocument (the document's bleed, document.setup), top, bottom, left, right} (pt; art in the bleed is kept). Each page: TrimBox = artboard, BleedBox = artboard + bleed, MediaBox = that + the marks' room (art clipped to the BleedBox), output?: {conversion: none (default)|destination (every colour into the destination profile's model, CMYK or RGB, also colours of that model in another profile)|preserveNumbers (only colours of the other model and Lab; those in the destination's model keep their numbers) (grey stays grey; images are converted too, printer's marks are not), destination: profile name (edit.colorSettings lists them; default: the document's profile for its colour mode), profiles: none (device colours)|all|destination|taggedSource (documents assigned a profile: edit.assignProfile) (ICC-based colours: CMYK with the destination or document CMYK profile, RGB as sRGB, grey with the sRGB tone curve; PDF/A always), outputIntent: profile name (embedded as the catalog's /GTS_PDFX output intent; a name that isn't a profile is only named, which pdfX1a and pdfX3 allow only with a registry and pdfX4 refuses; pdfX1a needs a CMYK one), outputCondition, outputConditionId (default: outputIntent), registry, trapped (/Trapped /True; /False when an output intent is written)} (PDF/A files keep their own output intent), advanced?: {fontSubsetPercent: 100 (below 100 is accepted with a warning: fonts are always embedded as subsets), outlineText: true (false: type as real, selectable and searchable text in embedded subset fonts with a ToUnicode map; fonts whose licence forbids embedding, or allows only whole fonts, stay outlines with a warning), overprint: preserve (overprinting fills and strokes set /OP /op true, /OPM 1; white ones knock out with document.setup discardWhiteOverprint)|discard (they knock out)}, security?: {openPassword, permissionsPassword, printing: none|low|high, changes: none|pages|forms|comments|any, copy, screenReader, plaintextMetadata}} → {path, bytes, warnings}; no path → {dataBase64, bytes, warnings}. The options apply over the preset (null keeps its value); options accepted but not applied yet c
Line truncated
+            "{path?, preset?: \"VectorCraft Default\" (built-in or saved: pdf.preset.list), artboard? | artboards?: [i…] | range?: \"1-3, 5\" (1-based; default all, one page each), standard?: none|pdfA2b|pdfX1a (CMYK, grey and spot colours only: colours and images converted to output.destination or the CMYK output intent, untagged; transparency flattened with flattenerPreset; PDF 1.3)|pdfX3 (colours ICC-tagged; transparency flattened; PDF 1.3)|pdfX4 (transparency and layers kept; colours ICC-tagged; PDF 1.6 at most) (PDF/X: a /GTS_PDFX output intent, by default the CMYK profile in effect, embedded; TrimBox, Trapped, GTS_PDFXVersion, title and dates; fonts embedded or outlined), compatibility?: 1.3 (no transparency: it is flattened with flattenerPreset; images keep no see-through pixels)|1.4|1.5|1.6|1.7 (default)|2.0 (choosing a standard sets its version: 1.7 for pdfA2b, 1.6 for pdfX4, 1.3 for pdfX1a and pdfX3, which write 1.4 as 1.3 too; pdfA2b refuses 1.3), preserveEditing? (on in VectorCraft Default: the native document as an embedded file, which document.open restores; choosing a standard turns it off, a standard refuses it), thumbnails? (each page drawn as a /Thumb image, 106 px on its long side), fastWebView? (a linearised file: the first page shows while the rest downloads; it stays linearised when encrypted), viewAfterSaving? (the app opens the written file), createLayers? (each layer and sublayer but template layers as a PDF layer, an optional content group listed under its layer's: hidden layers off, non-printing ones /PrintState /OFF, locked ones locked; needs 1.5 or later; they reopen as layers; choosing pdfX1a or pdfX3 turns it off; they refuse it), includeNonPrinting? (keep layers whose Print option is off; left out by default unless createLayers), flattenerPreset?: \"\" (High Resolution) | high | medium | low | a saved preset (flattener.presets.list): what PDF 1.3 files flatten transparency with, flattener?: {object.flattenTransparency options over it}, compression?: {color?, gray?: {downsample: none|average|subsample|bicubic, ppi: 300, abovePpi: 450, compression: none|zip|jpeg|jpeg2000|auto, quality: minimum|low|medium|high|maximum}, mono?: {downsample, ppi: 1200, abovePpi: 1800, compression: none|ccittG3|ccittG4|zip|runLength} (black-and-white images), compressText?: true} (images above abovePpi are resampled to ppi; auto keeps JPEGs JPEG, the others lossless; JPEG needs opaque images; none, jpeg2000, CCITT and runLength are written as ZIP with a warning), marks?: {trim, registration, colorBars, pageInfo, kind: roman|japanese, weight: 0.25 (trim marks and targets), offset: 6 (pt from the artboard, at least the bleed)} (printer's marks in [Registration], every plate: trim marks, registration targets mid-side, CMYK/spot/black-tint colour bars on top, page information (title, artboard, date UTC) below), bleed?: {useDocument (the document's bleed, document.setup), top, bottom, left, right} (pt; art in the bleed is kept). Each page: TrimBox = artboard, BleedBox = artboard + bleed, MediaBox = that + the marks' room (art clipped to the BleedBox), output?: {conversion: none (default)|destination (every colour into the destination profile's model, CMYK or RGB, also colours of that model in another profile)|preserveNumbers (only colours of the other model and Lab; those in the destination's model keep their numbers) (grey stays grey; images are converted too, printer's marks are not), destination: profile name (edit.colorSettings lists them; default: the document's profile for its colour mode), profiles: none (device colours)|all|destination|taggedSource (documents assigned a profile: edit.assignProfile) (ICC-based colours: CMYK with the destination or document CMYK profile, RGB as sRGB, grey with the sRGB tone curve; PDF/A always), outputIntent: profile name (embedded as the catalog's /GTS_PDFX output intent; a name that isn't a profile is only named, which pdfX1a and pdfX3 allow only with a registry and pdfX4 refuses; pdfX1a needs a CMYK one), outputCondition, outputConditionId (default: outputIntent), registry, trapped (/Trapped /True; /False when an output intent is written)} (PDF/A files keep their own output intent), advanced?: {fontSubsetPercent: 100 (below 100 is accepted with a warning: fonts are always embedded as subsets), outlineText: true (false: type as real, selectable and searchable text in embedded subset fonts with a ToUnicode map; fonts whose licence forbids embedding, or allows only whole fonts, stay outlines with a warning), overprint: preserve (overprinting fills and strokes set /OP /op true, /OPM 1; white ones knock out with document.setup discardWhiteOverprint)|discard (they knock out)}, security?: {openPassword, permissionsPassword, printing: none|low|high, changes: none|pages|forms|comments|any, copy, screenReader, plaintextMetadata}} → {path, bytes, warnings}; no path → {dataBase64, bytes, warnings}. The options apply over the preset (null keeps its value); options ac
Line truncated
             has_doc,
             export_pdf
         ),

crates/engine/src/cmd/fileio/save.rs

@@ -305,6 +305,40 @@ fn blank_pages(doc: &Document) -> Document {
 /// Why a `.ai` file saved without PDF content looks empty elsewhere.
 const NOT_PDF_COMPATIBLE: &str = "saved without PDF content: VectorCraft opens it as before, other apps show empty pages";
 
+/// The encoder's params for a `.ai` file, from a save's or an export's: a PDF of every artboard
+/// with the PDF options, always carrying the native document, its layers and sublayers PDF layers
+/// (hidden ones off) unless asked otherwise; Use Compression compresses the PDF's content.
+pub(super) fn ai_params(params: &mut Value) {
+    let Some(o) = params.as_object_mut() else { return };
+    o.extend([("preserveEditing".into(), json!(true)), ("range".into(), json!("all"))]);
+    // Apps that read the PDF part (not the native document) then find the layers, the hidden ones
+    // with their art (#372); a PDF standard decides for itself.
+    if o.get("standard").is_none_or(Value::is_null) {
+        o.entry("createLayers").or_insert(json!(true));
+    }
+    if let Some(c) = o.get("compress").and_then(Value::as_bool) {
+        let compression = o.entry("compression").or_insert_with(|| json!({}));
+        if let Some(m) = compression.as_object_mut() {
+            m.insert("compressText".into(), json!(c));
+        }
+    }
+}
+
+/// Encode `doc` as a PDF-compatible `.ai` file (`params` as [`ai_params`] makes them) for command
+/// `cmd`: its pages (blank with `pdfCompatible: false`, which it then notes), carrying the native
+/// document. File › Save As writes it, and so do the exports (`document.export`, the CLI).
+pub(super) fn encode_ai(cmd: &str, f: &Format, doc: &Document, params: &Value) -> Result<Encoded> {
+    let compatible = bool_or(params, "pdfCompatible", true);
+    let pages = doc.without_edit_modes();
+    let pages = if compatible { pages } else { std::borrow::Cow::Owned(blank_pages(&pages)) };
+    let native = || super::native::ai_native(cmd, f, doc, params);
+    let (bytes, mut warnings) = super::pdf::encode_carrying(cmd, &pages, params, native)?;
+    if !compatible {
+        warnings.insert(0, NOT_PDF_COMPATIBLE.to_string());
+    }
+    Ok(Encoded { warnings, ..Encoded::one(bytes) })
+}
+
 /// Snapshot the active document for `plan` (stamping File Info's dates when the file becomes the
 /// document's own). Bad options fail here, before anything is encoded.
 pub fn save_job(s: &mut Session, plan: SavePlan) -> Result<SaveJob> {
@@ -339,16 +373,8 @@ pub(crate) fn job_for(s: &Session, st: &DocState, plan: SavePlan) -> Result<Save
     }
     let boards = separate_boards(cmd, plan.format, &doc, &params)?;
     let mut params = super::pdf::expand_preset(s, cmd, &params)?.into_owned();
-    if let (Some(o), "ai") = (params.as_object_mut(), plan.format.id) {
-        // A PDF of every artboard with the PDF options, always carrying the native document.
-        o.extend([("preserveEditing".into(), json!(true)), ("range".into(), json!("all"))]);
-        // Use Compression compresses the PDF's content.
-        if let Some(c) = o.get("compress").and_then(Value::as_bool) {
-            let compression = o.entry("compression").or_insert_with(|| json!({}));
-            if let Some(m) = compression.as_object_mut() {
-                m.insert("compressText".into(), json!(c));
-            }
-        }
+    if plan.format.id == "ai" {
+        ai_params(&mut params);
     }
     Ok(SaveJob { plan, doc, params, snapshot: st.doc.clone(), boards })
 }
@@ -372,25 +398,14 @@ impl SaveJob {
             let one = self.encode_one(&artboard_doc(&self.doc, b))?;
             enc.files.extend(one.files.into_iter().map(|(_, bytes)| (Some(b), bytes)));
         }
-        let pdf_less = self.plan.format.id == "ai" && !bool_or(&self.params, "pdfCompatible", true);
-        let notes = fidelity_warning(self.plan.format).into_iter().chain(pdf_less.then(|| NOT_PDF_COMPATIBLE.to_string()));
-        enc.warnings.splice(0..0, notes);
+        enc.warnings.splice(0..0, fidelity_warning(self.plan.format));
         Ok(enc)
     }
 
     /// Encode one file of `doc` in the job's format.
     fn encode_one(&self, doc: &Document) -> Result<Encoded> {
         let (cmd, f) = (self.plan.mode.command(), self.plan.format);
-        let enc = if f.id == "ai" {
-            // The pages (blank without PDF content), carrying the native document.
-            let pages = doc.without_edit_modes();
-            let pages = if bool_or(&self.params, "pdfCompatible", true) { pages } else { std::borrow::Cow::Owned(blank_pages(&pages)) };
-            let native = || super::native::ai_native(cmd, f, doc, &self.params);
-            let (bytes, warnings) = super::pdf::encode_carrying(cmd, &pages, &self.params, native)?;
-            Encoded { warnings, ..Encoded::one(bytes) }
-        } else {
-            encode_all(doc, f.id, &self.params)?
-        };
+        let enc = if f.id == "ai" { encode_ai(cmd, f, doc, &self.params)? } else { encode_all(doc, f.id, &self.params)? };
         if enc.files.len() != 1 {
             return Err(bad(cmd, "Save writes one artboard: name one, or export several with document.export"));
         }
@@ -450,12 +465,17 @@ impl SaveJob {
     /// its own also ends its Data Recovery copy.
     pub fn complete(self, s: &mut Session, uid: u64) {
         let saved = self.plan.retargets() && self.plan.path.is_some();
+        // The other open documents that place this one show the new version.
+        let written = self.plan.path.clone().filter(|_| matches!(self.plan.format.id, "vectorcraft" | "template"));
         if let Some(st) = s.document_mut(uid) {
             self.finish(st);
         }
         if saved {
             crate::cmd::recovery::forget(s, uid);
         }
+        if let Some(path) = written {
+            crate::cmd::links::refresh_placed(s, uid, &path);
+        }
     }
 }
 

crates/engine/src/cmd/fileio/screens.rs

@@ -161,7 +161,7 @@ impl Row {
             return Err(bad(C, "each format is an object {format, scale?, suffix?}"));
         }
         let format = writable(C, Some(str_param(row, "format").unwrap_or("png")), None)?;
-        if matches!(format.id, "vectorcraft" | "template" | "txt" | "dxf" | "eps" | "emf" | "wmf") {
+        if matches!(format.id, "vectorcraft" | "template" | "ai" | "txt" | "dxf" | "eps" | "emf" | "wmf") {
             return Err(bad(C, "Export for Screens writes png, png8, jpg, webp, gif, svg, svgz or pdf"));
         }
         // Vector formats have no pixel size: it doesn't apply and adds no @2x suffix (not even one

crates/engine/src/cmd/fileio/svg.rs

@@ -19,7 +19,7 @@ pub const OPTIONS: &[FormatOption] = &[
         name: "useArtboards",
         ty: "boolean",
         default: "true",
-        description: "false: one SVG of the bounds of all art instead of artboards (several artboards write one file each)",
+        description: "false: one SVG of the bounds of all art instead of artboards (several artboards write one file each; a named artboard's file holds only the art over it)",
     },
     FormatOption {
         name: "styling",
@@ -70,7 +70,7 @@ pub const OPTIONS: &[FormatOption] = &[
         name: "hiddenLayers",
         ty: "boolean",
         default: "false",
-        description: "keep hidden layers, not displayed (display:none); document.save sets it unless given",
+        description: "keep hidden layers and objects, not displayed (display=\"none\"); document.save sets it unless given",
     },
     FormatOption {
         name: "encoding",
@@ -125,8 +125,10 @@ pub fn options_map(p: &Value) -> Result<Map<String, Value>, String> {
     Ok(m)
 }
 
-/// The writer options and the artboards (`None`: the art bounds) an SVG export of `doc` covers.
-fn plan(doc: &Document, p: &Value) -> Result<(ExportOptions, Vec<Option<usize>>), String> {
+/// The writer options and the artboards (`None`: the art bounds) an SVG export of `doc` covers,
+/// and whether `p` named those artboards (else the first stands for the whole document, as Save
+/// writes it).
+fn plan(doc: &Document, p: &Value) -> Result<(ExportOptions, Vec<Option<usize>>, bool), String> {
     let mut m = options_map(p)?;
     // Fonts: unless chosen, Document Setup → Type → Export decides (appearance = outlines).
     if !m.contains_key("outlineText") && doc.setup.export_text == vectorcraft_doc::ExportText::Appearance {
@@ -138,21 +140,24 @@ fn plan(doc: &Document, p: &Value) -> Result<(ExportOptions, Vec<Option<usize>>)
     opts.check().map_err(|e| format!("SVG options: {e}"))?;
     let n = doc.artboards.len();
     if n == 0 || boards.use_artboards == Some(false) {
-        return Ok((opts, vec![None]));
+        return Ok((opts, vec![None], false));
     }
-    let picked = boards.pick.resolve(n)?.unwrap_or_else(|| vec![0]);
-    Ok((opts, picked.into_iter().map(Some).collect()))
+    let named = boards.pick.resolve(n)?;
+    let chosen = named.is_some();
+    Ok((opts, named.unwrap_or_else(|| vec![0]).into_iter().map(Some).collect(), chosen))
 }
 
 /// Encode `doc` as SVG (or gzipped, SVGZ): one file per chosen artboard, with the images they
 /// link to and the writer's warnings.
 pub(super) fn encode(doc: &Document, p: &Value, compressed: bool) -> Result<Encoded, String> {
-    let (opts, boards) = plan(doc, p)?;
+    let (opts, boards, chosen) = plan(doc, p)?;
     // Preserve editing embeds the native document (once, shared by every file).
     let native = opts.preserve_editing.then(|| vectorcraft_format::save(doc, false));
     let mut enc = Encoded::default();
     for artboard in boards {
-        let mut out = vectorcraft_svg::export_full(doc, &ExportOptions { artboard, ..opts.clone() }, native.as_deref());
+        // A chosen artboard's file holds the art over it (#550).
+        let over = artboard.filter(|_| chosen).and_then(|b| doc.artboards.get(b)).map(|a| super::export::art_over(doc, a.rect));
+        let mut out = vectorcraft_svg::export_full(over.as_ref().unwrap_or(doc), &ExportOptions { artboard, ..opts.clone() }, native.as_deref());
         let bytes = out.take_bytes();
         for l in out.linked {
             if !enc.linked.iter().any(|e| e.name == l.name) {

crates/engine/src/cmd/fileio/tests.rs

@@ -173,6 +173,7 @@ fn export_extensions_name_every_writable_format() {
             "svg",
             "svgz",
             "pdf",
+            "ai",
             "png",
             "jpg",
             "gif",
@@ -206,6 +207,7 @@ fn formats_query_lists_readers_writers_and_options() {
             "svg",
             "svgz",
             "pdf",
+            "ai",
             "png",
             "jpg",
             "gif",

crates/engine/src/cmd/fileio/tests_pdfedit.rs

@@ -118,6 +118,27 @@ fn ai_files_are_pdfs_that_save_and_reopen_editable() {
     assert_eq!(s.doc().unwrap().path, None);
 }
 
+/// #526: the exports (`document.export`, the CLI's `--export` and `convert`) write `.ai` as Save
+/// As does, leaving the document's own path alone.
+#[test]
+fn exports_write_ai_as_save_as_does() {
+    let mut s = rich();
+    let before = comparable(&s.doc().unwrap().doc);
+    let path = tmp("exported.ai");
+    let r = s.execute("document.export", &json!({"path": path})).unwrap();
+    assert_eq!(r["format"], "ai", "{r}");
+    let bytes = std::fs::read(&path).unwrap();
+    assert!(bytes.starts_with(b"%PDF") && vectorcraft_pdf::editing(&bytes).is_some_and(|e| e.intact), "PDF-compatible, carrying the document");
+    assert_eq!(s.doc().unwrap().path, None, "an export doesn't give the document a path");
+    let r = s.execute("document.open", &json!({"path": path})).unwrap();
+    assert_eq!((&r["format"], &r["restored"]), (&json!("ai"), &json!(true)), "{r}");
+    assert_eq!(comparable(&s.doc().unwrap().doc), before);
+    // Its options as Save As takes them; no path gives the bytes.
+    let r = s.execute("document.export", &json!({"format": "ai", "pdfCompatible": false})).unwrap();
+    assert!(r["warnings"].as_array().unwrap().iter().any(|w| w.as_str().is_some_and(|w| w.contains("without PDF content"))), "{r}");
+    assert!(b64(&r).starts_with(b"%PDF"));
+}
+
 #[test]
 fn ait_templates_open_their_document_untitled() {
     let mut s = rich();

crates/engine/src/cmd/fileio/tests_pdflayers.rs

@@ -59,3 +59,35 @@ fn export_pdf_overprint_is_preserved_or_discarded() {
     assert_eq!(overprints(&mut s, json!({"compression": {"compressText": false}})), 1);
     assert_eq!(overprints(&mut s, json!({"advanced": {"overprint": "discard"}})), 0);
 }
+
+/// A `.ai` file's PDF part, which apps that don't read the native document open, has the layers
+/// and sublayers as PDF layers, the hidden ones with their art (#372).
+#[test]
+fn ai_files_write_their_layers_and_sublayers_as_pdf_layers() {
+    let mut s = session();
+    let layer1 = s.execute("document.inspect", &json!({})).unwrap()["layers"][1]["id"].as_u64().unwrap();
+    let sub = s.execute("layer.newSublayer", &json!({"parent": layer1, "name": "Sketch"})).unwrap()["id"].as_u64().unwrap();
+    s.execute("layer.setCurrent", &json!({"id": sub})).unwrap();
+    s.execute("shape.ellipse", &json!({"x": 10, "y": 40, "width": 20, "height": 20})).unwrap();
+    s.execute("layer.setProps", &json!({"id": sub, "visible": false})).unwrap();
+    // Name, shown and what it holds (sublayers by name), top-level layers in paint order.
+    fn rows(layers: &[std::sync::Arc<vectorcraft_doc::Node>]) -> Vec<(String, bool, Vec<String>)> {
+        layers
+            .iter()
+            .map(|l| {
+                let held =
+                    l.children().into_iter().flatten().map(|c| c.name.clone().filter(|_| c.is_layer()).unwrap_or_else(|| "art".into())).collect();
+                (l.name.clone().unwrap_or_default(), l.visible, held)
+            })
+            .collect()
+    }
+    let v = s.execute("document.export", &json!({"format": "ai"})).unwrap();
+    let back = vectorcraft_pdf::import(&b64(&v)).unwrap();
+    let art = || "art".to_string();
+    assert_eq!(rows(&back.layers), [("Layer 1".to_string(), true, vec![art(), "Sketch".into()]), ("Notes".to_string(), false, vec![art()])]);
+    let sketch = back.layers.first().and_then(|l| l.children()?.last().cloned()).unwrap();
+    assert_eq!(rows(&[sketch]), [("Sketch".to_string(), false, vec![art()])]);
+    // Asked not to, it writes none.
+    let v = s.execute("document.export", &json!({"format": "ai", "createLayers": false})).unwrap();
+    assert_eq!(vectorcraft_pdf::import(&b64(&v)).unwrap().layers.len(), 1);
+}

crates/engine/src/cmd/fileio/tests_svgenc.rs

@@ -49,3 +49,28 @@ fn profile_and_embedded_fonts_reach_the_writer() {
     assert!(s.execute("document.serialize", &json!({"format": "svg", "svg": {"profile": "svg2"}})).is_err(), "unknown profiles are refused");
     assert!(s.execute("document.serialize", &json!({"format": "svg", "encoding": "ebcdic"})).is_err(), "unknown encodings are refused");
 }
+
+/// #550: an SVG of chosen artboards holds the art over each, not every artboard's art; with no
+/// artboard named (as Save writes it) the whole document's art is there.
+#[test]
+fn a_chosen_artboard_s_svg_holds_only_its_own_art() {
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 100, "height": 100, "artboards": 3})).unwrap();
+    let x = |s: &Session, b: usize| s.doc().unwrap().doc.artboards[b].rect.x0;
+    let (first, third) = (x(&s, 0), x(&s, 2));
+    s.execute("shape.rectangle", &json!({"x": first + 10.0, "y": 10, "width": 30, "height": 30})).unwrap();
+    s.execute("shape.ellipse", &json!({"x": third + 10.0, "y": 10, "width": 30, "height": 30})).unwrap();
+    // A rectangle has straight sides only; the ellipse is curves.
+    let shapes = |svg: &str| (svg.matches("<path").count() + svg.matches("<rect").count(), svg.contains(" C") || svg.contains("<ellipse"));
+    let text = |v: &serde_json::Value| v["text"].as_str().unwrap().to_string();
+    let third_only = text(&s.execute("document.serialize", &json!({"format": "svg", "useArtboards": true, "range": "3"})).unwrap());
+    assert_eq!(shapes(&third_only), (1, true), "{third_only}");
+    let all = s.execute("document.serialize", &json!({"format": "svg", "useArtboards": true, "range": "all"})).unwrap();
+    let files: Vec<String> = all["files"].as_array().unwrap().iter().map(text).collect();
+    assert_eq!(files.iter().map(|f| shapes(f)).collect::<Vec<_>>(), [(1, false), (0, false), (1, true)]);
+    // Export for Screens names one artboard at a time the same way.
+    let screen = text(&s.execute("document.serialize", &json!({"format": "svg", "artboard": 0})).unwrap());
+    assert_eq!(shapes(&screen), (1, false));
+    let whole = text(&s.execute("document.serialize", &json!({"format": "svg"})).unwrap());
+    assert_eq!(shapes(&whole).0, 2, "nothing named: the whole document's art");
+}

crates/engine/src/cmd/flatten.rs

@@ -1185,6 +1185,8 @@ impl Scratch {
                 let art = self.doc.symbols.iter().find(|s| &s.name == symbol).map(|s| vectorcraft_render::instance_art(&s.art, n));
                 art.and_then(|a| effects::outline_art(n, Some(&a))).map(|g| carry(n, g))
             }
+            // A placed document stays one: its art's resources aren't the document's.
+            NodeKind::PlacedDocument(_) => None,
             NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Repeat(_) => {
                 let hook: &dyn Fn(&Node) -> Option<Node> = &effects::outline_text;
                 Some(carry(n, vectorcraft_doc::live::expanded_group(n, Some(hook))))

crates/engine/src/cmd/links.rs

@@ -16,13 +16,17 @@
 //! selects one (`links.goTo`), Embed keeps a linked file's pixels in the document
 //! (`links.embed`) and Unembed writes an embedded image to a file it then links to
 //! (`links.unembed`).
+//!
+//! Placed documents ([`PlacedDocument`], VectorCraft documents placed with Link) link to their
+//! files the same way: checking, updating, relinking and finding them on open work alike, and they
+//! are listed. Embed (Break Link) turns one into an editable copy of its art.
 
 use std::collections::BTreeMap;
 use std::path::{Component, Path};
 
 use serde_json::{Value, json};
 use vectorcraft_doc::links::{Align, Preserve, hash_bytes};
-use vectorcraft_doc::{Appearance, Document, ImageBlob, ImageObject, LinkInfo, Node, NodeId, NodeKind, PlacementOptions};
+use vectorcraft_doc::{Appearance, Document, ImageBlob, ImageObject, LinkInfo, Node, NodeId, NodeKind, PlacedDocument, PlacementOptions};
 use vectorcraft_geom::{Affine, Rect, shapes};
 
 use super::fileio::{self, RasterImage, absolute_path, file_created, file_stamp, read_file, write_file};
@@ -35,7 +39,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Check Links",
             [],
             None,
-            "{ids?: [image ids] (default: every linked image)} where each linked file is and whether it changed since it was read → {links: [{name, path, status: ok|modified|missing, ids, found?: path (found away from its path: relative to the document, or by name in its folder), preview: true (showing the low-resolution preview, not the file)}], missing, modified}",
+            "{ids?: [image or placed document ids] (default: every linked image and placed document)} where each linked file is and whether it changed since it was read → {links: [{name, path, status: ok|modified|missing, ids, found?: path (found away from its path: relative to the document, or by name in its folder), preview: true (showing the low-resolution preview, not the file)}], missing, modified}",
             has_doc,
             check
         ),
@@ -44,7 +48,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Update Links",
             [],
             None,
-            "{ids?: [image ids] (default: the linked images whose file was modified or is showing its preview)} read their linked files again; each image keeps its bounds. One undo step → {updated: [ids], missing: [ids]}",
+            "{ids?: [image or placed document ids] (default: the linked images whose file was modified or is showing its preview, and placed documents whose file was modified)} read their linked files again; each keeps its bounds. One undo step → {updated: [ids], missing: [ids]}",
             has_doc,
             update
         ),
@@ -53,7 +57,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Relink",
             [],
             None,
-            "{ids?: [image ids] (default: the selected images; with folder and nothing selected, every missing link), path | folder} link images to the file at path, or each to the file of its link's name in folder; embedded images become linked; each keeps its bounds. One undo step → {relinked: [ids], notFound: [file names]}",
+            "{ids?: [image or placed document ids] (default: the selected ones; with folder and nothing selected, every missing link), path | folder} link images (or placed documents, each showing the same artboard of the new file) to the file at path, or each to the file of its link's name in folder; embedded images become linked; each keeps its bounds. One undo step → {relinked: [ids], notFound: [file names]}",
             has_doc,
             relink
         ),
@@ -62,7 +66,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Links",
             [],
             None,
-            "{show?: all (default)|missing|modified|embedded, sort?: name|kind (file format)|status (missing, modified, ok, embedded); default: stacking order, top first} every image object in the layers, as the Links panel lists them → {links: [{id, name, linked, status: ok|modified|missing|embedded, format, pixelWidth, pixelHeight, path?, found?: path (found away from its path), page?, preview?: true (showing the saved preview)}], missing, modified, embedded}",
+            "{show?: all (default)|missing|modified|embedded, sort?: name|kind (file format)|status (missing, modified, ok, embedded); default: stacking order, top first} every image object and placed document in the layers, as the Links panel lists them → {links: [{id, name, linked, status: ok|modified|missing|embedded, format, pixelWidth, pixelHeight, path?, found?: path (found away from its path), page?, preview?: true (showing the saved preview), document?: true (a placed document: pageWidth and pageHeight in pt instead of pixels)}], missing, modified, embedded}",
             has_doc,
             list
         ),
@@ -71,7 +75,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Go To Link",
             [],
             None,
-            "{id?} select image `id` (default: the first selected image); the Links panel scrolls it into view → {id, bounds: [x0, y0, x1, y1]}",
+            "{id?} select image or placed document `id` (default: the first selected one); the Links panel scrolls it into view → {id, bounds: [x0, y0, x1, y1]}",
             has_doc,
             go_to
         ),
@@ -80,7 +84,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Embed Image",
             [],
             None,
-            "{ids?: [image ids] (default: the selected linked images)} keep the linked files' pixels in the document and drop the links (an image whose file can't be found and that shows the saved preview stays linked: relink it first). One undo step → {embedded: [ids], missing: [ids]}",
+            "{ids?: [image or placed document ids] (default: the selected linked ones)} break the links (the Links panel's Break Link): images keep the linked files' pixels in the document; a placed document becomes an editable copy of its art, as placing its file without link gives (its symbols, patterns, swatches and images joining the document). An image whose file can't be found and that shows the saved preview, or a placed document whose file can't be read or changed, stays linked: relink or update it first. One undo step → {embedded: [ids], missing: [ids]}",
             has_doc,
             embed
         ),
@@ -98,7 +102,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Link Info",
             [],
             None,
-            "{id?} an image's Link Info (default: the one selected) → image.info's fields (id, name, linked, link, colorMode, pixelWidth, pixelHeight, width, height) and status: ok|modified|missing|embedded, format, ppi: [x, y] (the file's), effectivePpi: [x, y] (at its placed size), scale: [x%, y%] (of its 100% size), rotation (degrees, counter-clockwise), placement: {preserve, align, clip}; linked images also fileName, location (its folder), page?, fileSize? (bytes), modified?, created? (ms since the Unix epoch)",
+            "{id?} an image's or placed document's Link Info (default: the one selected) → image.info's fields (id, name, linked, link, colorMode, pixelWidth, pixelHeight, width, height) and status: ok|modified|missing|embedded, format, ppi: [x, y] (the file's), effectivePpi: [x, y] (at its placed size), scale: [x%, y%] (of its 100% size), rotation (degrees, counter-clockwise), placement: {preserve, align, clip}; linked images also fileName, location (its folder), page?, fileSize? (bytes), modified?, created? (ms since the Unix epoch); a placed document has document: true, pageWidth and pageHeight (pt) instead of pixels, ppi and colorMode, and its scale is of its artboard's 100% size",
             has_doc,
             info
         ),
@@ -107,7 +111,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Placement Options",
             [],
             None,
-            "{ids?: [image ids] (default: the selected images), preserve?: transforms|bounds (default)|fileDimensions|fit|fill, align?: topLeft|top|topRight|left|center (default)|right|bottomLeft|bottom|bottomRight (where the new art sits; not for bounds), clip?: false (clip it to the old bounds where it is larger)} how a file read again (links.relink, links.update) takes each image's place: transforms keeps its scale (relative to each file's 100% size), rotation and position; bounds stretches it into the old bounds; fileDimensions puts it at 100%, unrotated; fit and fill scale it proportionally to fit inside or cover the old bounds. Without options → {placement} of the first image; else one undo step → {ids, placement}",
+            "{ids?: [image or placed document ids] (default: the selected ones), preserve?: transforms|bounds (default)|fileDimensions|fit|fill, align?: topLeft|top|topRight|left|center (default)|right|bottomLeft|bottom|bottomRight (where the new art sits; not for bounds), clip?: false (clip it to the old bounds where it is larger)} how a file read again (links.relink, links.update) takes each image's place: transforms keeps its scale (relative to each file's 100% size), rotation and position; bounds stretches it into the old bounds; fileDimensions puts it at 100%, unrotated; fit and fill scale it proportionally to fit inside or cover the old bounds. Without options → {placement} of the first image; else one undo step → {ids, placement}",
             has_doc,
             placement_options
         ),
@@ -134,22 +138,34 @@ impl Status {
     }
 }
 
-/// The image objects that show one linked file as one content (same path, same image).
+/// The image objects that show one linked file as one content (same path, same image), or the
+/// placed documents that show one artboard of it.
 struct Group {
     link: LinkInfo,
     key: String,
     /// The objects in the layers (images in symbols and patterns share the content, not an id).
     ids: Vec<NodeId>,
+    /// Placed documents: whether the art's bounds (not the artboard) are shown.
+    document: Option<bool>,
 }
 
-/// The linked images of `d` by file and content: those in the layers (only `ids` when given), then,
-/// without `ids`, the ones only symbols and patterns show.
+/// The linked object `n` as (link, content key, placed document's bounding).
+fn linked(n: &Node) -> Option<(&LinkInfo, &str, Option<bool>)> {
+    match &n.kind {
+        NodeKind::Image(im) => Some((im.link.as_ref()?, &im.key, None)),
+        NodeKind::PlacedDocument(p) => Some((&p.link, &p.key, Some(p.bounding))),
+        _ => None,
+    }
+}
+
+/// The linked images and placed documents of `d` by file and content: those in the layers (only `ids` when
+/// given), then, without `ids`, the ones only symbols and patterns show.
 fn groups(d: &Document, ids: Option<&[NodeId]>) -> Vec<Group> {
     let mut out: Vec<Group> = vec![];
-    let mut index: BTreeMap<(String, String), usize> = BTreeMap::new();
-    let mut add = |link: &LinkInfo, key: &str, id: Option<NodeId>| {
-        let i = *index.entry((link.path.clone(), key.to_string())).or_insert_with(|| {
-            out.push(Group { link: link.clone(), key: key.to_string(), ids: vec![] });
+    let mut index: BTreeMap<(String, String, bool), usize> = BTreeMap::new();
+    let mut add = |link: &LinkInfo, key: &str, document: Option<bool>, id: Option<NodeId>| {
+        let i = *index.entry((link.path.clone(), key.to_string(), document.is_some())).or_insert_with(|| {
+            out.push(Group { link: link.clone(), key: key.to_string(), ids: vec![], document });
             out.len() - 1
         });
         if let (Some(id), Some(g)) = (id, out.get_mut(i)) {
@@ -157,19 +173,19 @@ fn groups(d: &Document, ids: Option<&[NodeId]>) -> Vec<Group> {
         }
     };
     d.walk(|n| {
-        if let NodeKind::Image(im) = &n.kind
-            && let Some(l) = &im.link
+        if let Some((l, key, document)) = linked(n)
             && ids.is_none_or(|ids| ids.contains(&n.id))
         {
-            add(l, &im.key, Some(n.id));
+            add(l, key, document, Some(n.id));
         }
     });
     if ids.is_none() {
         d.visit_images(|_, im| {
             if let Some(l) = &im.link {
-                add(l, &im.key, None);
+                add(l, &im.key, None, None);
             }
         });
+        d.visit_placed(|_, p| add(&p.link, &p.key, Some(p.bounding), None));
     }
     out
 }
@@ -238,7 +254,7 @@ fn probe(g: &Group, dir: Option<&Path>) -> (Status, Option<Found>) {
     let same = match &l.hash {
         Some(h) => *h == hash_bytes(&bytes),
         // Linked before links kept a hash: the image the file decodes to.
-        None => fileio::raster_image(&bytes).is_ok_and(|img| img.key == g.key),
+        None => g.document.is_none() && fileio::raster_image(&bytes).is_ok_and(|img| img.key == g.key),
     };
     f.bytes = Some(bytes);
     (if same { Status::Ok } else { Status::Modified }, Some(f))
@@ -254,6 +270,15 @@ fn previewing(d: &Document, key: &str) -> bool {
     d.images.get(key).is_none_or(ImageBlob::is_proxy)
 }
 
+/// Does group `g` of `d` show something other than its file: an image its preview, a placed
+/// document nothing (its file's bytes are gone)?
+fn stale(d: &Document, g: &Group) -> bool {
+    match g.document {
+        None => previewing(d, &g.key),
+        Some(_) => !d.images.contains_key(&g.key),
+    }
+}
+
 /// A linked file of a document (File → Package): its path, name and bytes.
 pub(crate) struct LinkedFile {
     pub path: String,
@@ -301,6 +326,51 @@ fn read_image(f: &mut Found, base: &LinkInfo) -> Result<FileRead> {
     Ok((f.link(&bytes, base), fileio::raster_image(&bytes)?))
 }
 
+/// A linked file read for the objects that show it.
+enum Read {
+    Image(FileRead),
+    /// A VectorCraft document read for placed documents: the link to it and what they show.
+    Document(LinkInfo, super::place::document::Source),
+}
+
+/// The file at `f` read for group `g`: its image, or the artboard `g` shows.
+fn read_for(f: &mut Found, g: &Group, cmd: &str) -> Result<Read> {
+    let Some(bounding) = g.document else { return read_image(f, &g.link).map(Read::Image) };
+    let bytes = f.read()?;
+    let page = g.link.page.unwrap_or(1);
+    let src = super::place::document::source(&f.path, &bytes, Some(&f.path), page, bounding, cmd)?;
+    Ok(Read::Document(f.link(&bytes, &g.link), src))
+}
+
+/// Objects `ids` show what was read (see [`install`], [`install_document`]).
+fn install_read(d: &mut Document, ids: &[NodeId], read: Read, keep_bounds: bool) -> Result<()> {
+    match read {
+        Read::Image(r) => install(d, ids, r, keep_bounds),
+        Read::Document(link, src) => install_document(d, ids, &link, &src, keep_bounds),
+    }
+}
+
+/// Placed documents `ids` show `src`, read from the file `link` points at, each placed as its
+/// Placement Options say (`keep_bounds`: in its bounds, whatever they say).
+fn install_document(d: &mut Document, ids: &[NodeId], link: &LinkInfo, src: &super::place::document::Source, keep_bounds: bool) -> Result<()> {
+    let mut clips = vec![];
+    let (w, h) = (src.frame.width(), src.frame.height());
+    for id in ids {
+        let Some(NodeKind::PlacedDocument(p)) = d.node(*id).map(|n| &n.kind) else { continue };
+        let o = if keep_bounds { PlacementOptions { preserve: Preserve::Bounds, ..p.placement } } else { p.placement };
+        let (xf, clip) = placed_xf(p.xf, (p.width, p.height), (1.0, 1.0), (w, h), (1.0, 1.0), o);
+        if let Some(n) = d.node_mut(*id)
+            && let NodeKind::PlacedDocument(p) = &mut n.kind
+        {
+            let p: &mut PlacedDocument = p;
+            (p.key, p.width, p.height, p.xf, p.link) = (src.key.clone(), w, h, xf, link.clone());
+        }
+        clips.extend(clip.map(|c| (*id, c)));
+    }
+    super::place::document::store(d, src);
+    clips.into_iter().try_for_each(|(id, clip)| clip_image(d, id, clip))
+}
+
 /// Points per pixel of the file image `key` of `d` shows, at the resolution it declares (72 ppi
 /// when it declares none, or when only its preview is loaded).
 fn file_pt(d: &Document, key: &str) -> (f64, f64) {
@@ -318,9 +388,10 @@ type Clip = (Affine, (f64, f64));
 
 /// The transform an image placed with `xf` showing `old` pixels (`old_pt`: points per pixel at
 /// 100%) gives a new file of `new` pixels (`new_pt`), as Placement Options `o` say; and the clip
-/// when `o.clip` and the new art overflows the old bounds.
-fn placed_xf(xf: Affine, old: (u32, u32), old_pt: (f64, f64), new: (u32, u32), new_pt: (f64, f64), o: PlacementOptions) -> (Affine, Option<Clip>) {
-    let (ow, oh, nw, nh) = (old.0 as f64, old.1 as f64, new.0.max(1) as f64, new.1.max(1) as f64);
+/// when `o.clip` and the new art overflows the old bounds. (A placed document's "pixels" are points,
+/// one point each.)
+fn placed_xf(xf: Affine, old: (f64, f64), old_pt: (f64, f64), new: (f64, f64), new_pt: (f64, f64), o: PlacementOptions) -> (Affine, Option<Clip>) {
+    let (ow, oh, nw, nh) = (old.0, old.1, new.0.max(1e-9), new.1.max(1e-9));
     let [a, b, c, d, ..] = xf.as_coeffs();
     // The bounds' frame: the transform without its scale (rotation, reflection and position).
     let (su, sv) = (a.hypot(b), c.hypot(d));
@@ -388,7 +459,8 @@ fn install(d: &mut Document, ids: &[NodeId], (link, img): FileRead, keep_bounds:
     for id in ids {
         let Some(NodeKind::Image(im)) = d.node(*id).map(|n| &n.kind) else { continue };
         let o = if keep_bounds { PlacementOptions { preserve: Preserve::Bounds, ..im.placement } } else { im.placement };
-        let (xf, clip) = placed_xf(im.xf, (im.width, im.height), file_pt(d, &im.key), (img.width, img.height), new_pt, o);
+        let size = |w: u32, h: u32| (w as f64, h as f64);
+        let (xf, clip) = placed_xf(im.xf, size(im.width, im.height), file_pt(d, &im.key), size(img.width, img.height), new_pt, o);
         if let Some(n) = d.node_mut(*id)
             && let NodeKind::Image(im) = &mut n.kind
         {
@@ -436,11 +508,34 @@ pub fn resolve(d: &mut Document, doc_path: Option<&str>, update: bool) -> Resolv
         let row = rows(std::iter::once(&g));
         match probe(&g, folder(doc_path)) {
             (Status::Missing, _) => out.missing.extend(row),
-            (Status::Modified, Some(mut f)) if update => match read_image(&mut f, &g.link).and_then(|read| install(d, &g.ids, read, false)) {
-                Ok(()) => out.updated.extend(row),
-                Err(_) => out.missing.extend(row),
-            },
+            (Status::Modified, Some(mut f)) if update => {
+                match read_for(&mut f, &g, "document.open").and_then(|read| install_read(d, &g.ids, read, false)) {
+                    Ok(()) => out.updated.extend(row),
+                    Err(_) => out.missing.extend(row),
+                }
+            }
             (Status::Modified, _) => out.modified.extend(row),
+            // A placed document keeps its file's bytes: only lost ones are read again.
+            (Status::Ok, Some(mut f)) if g.document.is_some() => {
+                let read = if stale(d, &g) { Some(read_for(&mut f, &g, "document.open")) } else { None };
+                match read {
+                    Some(Ok(read)) => {
+                        if install_read(d, &g.ids, read, true).is_err() {
+                            out.missing.extend(row);
+                        }
+                    }
+                    Some(Err(_)) => out.missing.extend(row),
+                    None => {
+                        let link = match f.bytes.take() {
+                            Some(b) => f.link(&b, &g.link),
+                            None => LinkInfo { path: f.path.clone(), ..g.link.clone() },
+                        };
+                        if link != g.link {
+                            set_links(d, &g.ids, &link);
+                        }
+                    }
+                }
+            }
             (Status::Ok, Some(mut f)) => {
                 let preview = previewing(d, &g.key);
                 // Read when the images show the preview, or when the file's details changed.
@@ -471,17 +566,58 @@ pub fn resolve(d: &mut Document, doc_path: Option<&str>, update: bool) -> Resolv
     out
 }
 
-/// Image objects `ids` link to `link`.
+/// The link of linked object `n` (a linked image or a placed document) to change.
+fn link_mut(n: &mut Node) -> Option<&mut LinkInfo> {
+    match &mut n.kind {
+        NodeKind::Image(im) => im.link.as_mut(),
+        NodeKind::PlacedDocument(p) => Some(&mut p.link),
+        _ => None,
+    }
+}
+
+/// Linked image objects (or placed documents) `ids` link to `link`.
 fn set_links(d: &mut Document, ids: &[NodeId], link: &LinkInfo) {
     for id in ids {
-        if let Some(n) = d.node_mut(*id)
-            && let NodeKind::Image(im) = &mut n.kind
-        {
-            im.link = Some(link.clone());
+        if let Some(l) = d.node_mut(*id).and_then(link_mut) {
+            *l = link.clone();
         }
     }
 }
 
+/// Placed documents of the document saved at `path` (document `saved` of `s`) in the other open
+/// documents: read again from the new file, each as one Update Links step of its document.
+pub(crate) fn refresh_placed(s: &mut Session, saved: u64, path: &str) {
+    let path = absolute_path(path);
+    let targets: Vec<(usize, Vec<u64>)> = s
+        .documents()
+        .iter()
+        .enumerate()
+        .filter(|(_, st)| st.uid != saved)
+        .filter_map(|(i, st)| {
+            let mut ids = vec![];
+            st.doc.walk(|n| {
+                if let NodeKind::PlacedDocument(p) = &n.kind
+                    && p.link.path == path
+                {
+                    ids.push(n.id.0);
+                }
+            });
+            (!ids.is_empty()).then_some((i, ids))
+        })
+        .collect();
+    if targets.is_empty() {
+        return;
+    }
+    // Each document is updated as the active one, without switching tools.
+    let back = s.active;
+    for (i, ids) in targets {
+        s.active = Some(i);
+        // A file that can't be read leaves what its objects show: links.check reports it.
+        let _ = update(s, &json!({ "ids": ids }));
+    }
+    s.active = back;
+}
+
 // ---------- relative paths ----------
 
 /// `target` relative to folder `base` with `/` separators; `None` when they share no root (another
@@ -509,9 +645,7 @@ pub fn with_relative_paths(d: &Document, dest: &str) -> Option<Document> {
     let dir = Path::new(&dest).parent()?;
     let mut changes = vec![];
     d.walk(|n| {
-        if let NodeKind::Image(im) = &n.kind
-            && let Some(l) = &im.link
-        {
+        if let Some((l, _, _)) = linked(n) {
             let r = relative_path(Path::new(&l.path), dir);
             if r != l.relative {
                 changes.push((n.id, r));
@@ -523,10 +657,7 @@ pub fn with_relative_paths(d: &Document, dest: &str) -> Option<Document> {
     }
     let mut d = d.clone();
     for (id, r) in changes {
-        if let Some(n) = d.node_mut(id)
-            && let NodeKind::Image(im) = &mut n.kind
-            && let Some(l) = &mut im.link
-        {
+        if let Some(l) = d.node_mut(id).and_then(link_mut) {
             l.relative = r;
         }
     }
@@ -548,7 +679,7 @@ fn check(s: &mut Session, p: &Value) -> Result<Value> {
         if let Some(f) = found.filter(|f| f.path != g.link.path) {
             row["found"] = json!(f.path);
         }
-        if previewing(&st.doc, &g.key) {
+        if stale(&st.doc, g) {
             row["preview"] = json!(true);
         }
         links.push(row);
@@ -564,9 +695,9 @@ fn update(s: &mut Session, p: &Value) -> Result<Value> {
         match probe(&g, folder(st.path.as_deref())) {
             (Status::Missing, _) | (_, None) => missing.extend(ids_json(&g.ids)),
             // Unchanged and showing the file: nothing to read unless asked for by id.
-            (Status::Ok, Some(_)) if ids.is_none() && !previewing(&st.doc, &g.key) => {}
-            // Unreadable as an image counts as missing.
-            (_, Some(mut f)) => match read_image(&mut f, &g.link) {
+            (Status::Ok, Some(_)) if ids.is_none() && !stale(&st.doc, &g) => {}
+            // Unreadable as an image (or a document) counts as missing.
+            (_, Some(mut f)) => match read_for(&mut f, &g, "links.update") {
                 Ok(read) => reads.push((g.ids, read)),
                 Err(_) => missing.extend(ids_json(&g.ids)),
             },
@@ -574,7 +705,7 @@ fn update(s: &mut Session, p: &Value) -> Result<Value> {
     }
     let updated: Vec<u64> = reads.iter().flat_map(|(ids, _)| ids_json(ids)).collect();
     if !reads.is_empty() {
-        s.edit("Update Links", |d, _| reads.into_iter().try_for_each(|(ids, read)| install(d, &ids, read, false)))?;
+        s.edit("Update Links", |d, _| reads.into_iter().try_for_each(|(ids, read)| install_read(d, &ids, read, false)))?;
     }
     Ok(json!({ "updated": updated, "missing": missing }))
 }
@@ -583,7 +714,14 @@ fn relink(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "links.relink";
     let st = s.doc()?;
     let folder_param = str_param(p, "folder");
-    let image = |id: &NodeId| st.doc.node(*id).and_then(|n| if let NodeKind::Image(im) = &n.kind { Some(im) } else { None });
+    // An image or a placed document, with its link.
+    let image = |id: &NodeId| {
+        st.doc.node(*id).and_then(|n| match &n.kind {
+            NodeKind::Image(im) => Some(im.link.as_ref()),
+            NodeKind::PlacedDocument(p) => Some(Some(&p.link)),
+            _ => None,
+        })
+    };
     let ids: Vec<NodeId> = match ids_param(p, "ids") {
         Some(ids) => ids,
         None => {
@@ -599,7 +737,7 @@ fn relink(s: &mut Session, p: &Value) -> Result<Value> {
         }
     };
     if let Some(id) = ids.iter().find(|id| image(id).is_none()) {
-        return Err(bad(C, format!("object {} is not an image", id.0)));
+        return Err(bad(C, format!("object {} is not an image or a linked file", id.0)));
     }
     if ids.is_empty() {
         return Err(bad(C, "select the images to relink, or pass ids"));
@@ -611,7 +749,7 @@ fn relink(s: &mut Session, p: &Value) -> Result<Value> {
         (Some(path), _) => files.push((ids, absolute_path(path))),
         (None, Some(dir)) => {
             for id in ids {
-                let Some(link) = image(&id).and_then(|im| im.link.as_ref()) else { continue };
+                let Some(link) = image(&id).flatten() else { continue };
                 let path = absolute_path(&Path::new(dir).join(link.name()).to_string_lossy());
                 match files.iter_mut().find(|(_, p)| *p == path) {
                     Some((ids, _)) => ids.push(id),
@@ -625,12 +763,34 @@ fn relink(s: &mut Session, p: &Value) -> Result<Value> {
     let mut reads = vec![];
     for (ids, path) in files {
         let bytes = read_file(&path)?;
-        let img = fileio::raster_image(&bytes).map_err(|e| bad(C, format!("{path}: {e}")))?;
-        reads.push((ids, (link_info(&path, &bytes), img)));
+        let link = link_info(&path, &bytes);
+        // Images show the file; placed documents each show their artboard of it.
+        let mut images = vec![];
+        let mut documents: Vec<((u32, bool), Vec<NodeId>)> = vec![];
+        for id in ids {
+            match st.doc.node(id).map(|n| &n.kind) {
+                Some(NodeKind::PlacedDocument(pl)) => {
+                    let k = (pl.page(), pl.bounding);
+                    match documents.iter_mut().find(|(e, _)| *e == k) {
+                        Some((_, ids)) => ids.push(id),
+                        None => documents.push((k, vec![id])),
+                    }
+                }
+                _ => images.push(id),
+            }
+        }
+        if !images.is_empty() {
+            let img = fileio::raster_image(&bytes).map_err(|e| bad(C, format!("{path}: {e}")))?;
+            reads.push((images, Read::Image((link.clone(), img))));
+        }
+        for ((page, bounding), ids) in documents {
+            let src = super::place::document::source(&path, &bytes, Some(&path), page, bounding, C)?;
+            reads.push((ids, Read::Document(LinkInfo { page: Some(page), ..link.clone() }, src)));
+        }
     }
     let relinked: Vec<u64> = reads.iter().flat_map(|(ids, _)| ids_json(ids)).collect();
     if !reads.is_empty() {
-        s.edit("Relink", |d, _| reads.into_iter().try_for_each(|(ids, read)| install(d, &ids, read, false)))?;
+        s.edit("Relink", |d, _| reads.into_iter().try_for_each(|(ids, read)| install_read(d, &ids, read, false)))?;
     }
     not_found.sort();
     not_found.dedup();
@@ -652,18 +812,6 @@ fn selected_images(st: &crate::DocState, keep: impl Fn(&ImageObject) -> bool) ->
     st.selection.objects.iter().copied().filter(|id| image_of(&st.doc, *id).is_some_and(&keep)).collect()
 }
 
-/// `ids` (else the selected images `keep` accepts), checked to be images; an error when none.
-fn images_param(st: &crate::DocState, p: &Value, cmd: &str, keep: impl Fn(&ImageObject) -> bool) -> Result<Vec<NodeId>> {
-    let ids = ids_param(p, "ids").unwrap_or_else(|| selected_images(st, keep));
-    if let Some(id) = ids.iter().find(|id| image_of(&st.doc, **id).is_none()) {
-        return Err(bad(cmd, format!("object {} is not an image", id.0)));
-    }
-    if ids.is_empty() {
-        return Err(bad(cmd, "select the images, or pass ids"));
-    }
-    Ok(ids)
-}
-
 /// `id`, else the first selected image.
 fn image_param(st: &crate::DocState, p: &Value, cmd: &str) -> Result<NodeId> {
     let id = id_param(p, "id").or_else(|| selected_images(st, |_| true).first().copied()).ok_or_else(|| bad(cmd, "select an image, or pass id"))?;
@@ -674,6 +822,35 @@ fn image_param(st: &crate::DocState, p: &Value, cmd: &str) -> Result<NodeId> {
     }
 }
 
+/// The Placement Options of image or placed document `n`.
+fn placement_mut(n: &mut Node) -> Option<&mut PlacementOptions> {
+    match &mut n.kind {
+        NodeKind::Image(im) => Some(&mut im.placement),
+        NodeKind::PlacedDocument(p) => Some(&mut p.placement),
+        _ => None,
+    }
+}
+
+/// The Placement Options of image or placed document `id` of `d`.
+fn placement_of(d: &Document, id: NodeId) -> Option<PlacementOptions> {
+    match &d.node(id)?.kind {
+        NodeKind::Image(im) => Some(im.placement),
+        NodeKind::PlacedDocument(p) => Some(p.placement),
+        _ => None,
+    }
+}
+
+/// `id`, else the first selected image or placed document.
+fn linked_param(st: &crate::DocState, p: &Value, cmd: &str) -> Result<NodeId> {
+    let first = || st.selection.objects.iter().copied().find(|id| placement_of(&st.doc, *id).is_some());
+    let id = id_param(p, "id").or_else(first).ok_or_else(|| bad(cmd, "select an image, or pass id"))?;
+    match placement_of(&st.doc, id) {
+        Some(_) => Ok(id),
+        None if st.doc.node(id).is_none() => Err(crate::EngineError::NoNode(id)),
+        None => Err(bad(cmd, format!("object {} is not an image or a linked file", id.0))),
+    }
+}
+
 /// Per linked image in the layers of `st`: its file's status, where it was found when away from
 /// its path, and whether the image shows its preview (each file probed once).
 fn statuses(st: &crate::DocState) -> BTreeMap<NodeId, (Status, Option<String>, bool)> {
@@ -681,7 +858,7 @@ fn statuses(st: &crate::DocState) -> BTreeMap<NodeId, (Status, Option<String>, b
     for g in groups(&st.doc, None).iter().filter(|g| !g.ids.is_empty()) {
         let (status, found) = probe(g, folder(st.path.as_deref()));
         let found = found.map(|f| f.path).filter(|p| *p != g.link.path);
-        let preview = previewing(&st.doc, &g.key);
+        let preview = stale(&st.doc, g);
         out.extend(g.ids.iter().map(|id| (*id, (status, found.clone(), preview))));
     }
     out
@@ -696,6 +873,12 @@ fn format_label(d: &Document, im: &ImageObject) -> &'static str {
         .map_or("Image", |f| f.label)
 }
 
+/// A placed document's `links.list` fields: `format`, `document: true` and its artboard's size
+/// (`pageWidth`, `pageHeight`, pt) instead of pixels.
+fn document_row(p: &PlacedDocument) -> Value {
+    json!({ "format": "VectorCraft", "document": true, "pageWidth": p.width, "pageHeight": p.height })
+}
+
 /// Sort rank of a `links.list` status: missing, modified, ok, embedded.
 fn status_rank(status: &str) -> usize {
     ["missing", "modified", "ok", "embedded"].iter().position(|s| *s == status).unwrap_or(4)
@@ -709,17 +892,17 @@ fn list(s: &mut Session, p: &Value) -> Result<Value> {
         return Err(bad(C, format!("show `{show}`: all, missing, modified or embedded")));
     }
     let statuses = statuses(st);
-    let mut images = vec![];
+    let mut objects = vec![];
     st.doc.walk(|n| {
-        if let NodeKind::Image(im) = &n.kind {
-            images.push((n, im));
+        if matches!(n.kind, NodeKind::Image(_) | NodeKind::PlacedDocument(_)) {
+            objects.push(n);
         }
     });
     // Top first, as the Layers panel lists them.
-    images.reverse();
+    objects.reverse();
     let mut counts: BTreeMap<&str, usize> = BTreeMap::new();
     let mut rows = vec![];
-    for (n, im) in images {
+    for n in objects {
         let (status, found, preview) = match statuses.get(&n.id) {
             Some((s, f, p)) => (s.as_str(), f.as_deref(), *p),
             None => ("embedded", None, false),
@@ -728,17 +911,21 @@ fn list(s: &mut Session, p: &Value) -> Result<Value> {
         if show != "all" && show != status {
             continue;
         }
-        let name = im.link.as_ref().map_or_else(|| n.display_name(), |l| l.name().to_string());
-        let mut row = json!({
-            "id": n.id.0,
-            "name": name,
-            "linked": im.link.is_some(),
-            "status": status,
-            "format": format_label(&st.doc, im),
-            "pixelWidth": im.width,
-            "pixelHeight": im.height,
-        });
-        if let Some(l) = &im.link {
+        let (link, mut row) = match &n.kind {
+            NodeKind::Image(im) => {
+                (im.link.as_ref(), json!({ "format": format_label(&st.doc, im), "pixelWidth": im.width, "pixelHeight": im.height }))
+            }
+            NodeKind::PlacedDocument(p) => (Some(&p.link), document_row(p)),
+            _ => continue,
+        };
+        let name = link.map_or_else(|| n.display_name(), |l| l.name().to_string());
+        if let Some(o) = row.as_object_mut() {
+            o.insert("id".into(), json!(n.id.0));
+            o.insert("name".into(), json!(name));
+            o.insert("linked".into(), json!(link.is_some()));
+            o.insert("status".into(), json!(status));
+        }
+        if let Some(l) = link {
             row["path"] = json!(l.path);
             if let Some(page) = l.page {
                 row["page"] = json!(page);
@@ -766,7 +953,7 @@ fn list(s: &mut Session, p: &Value) -> Result<Value> {
 
 fn go_to(s: &mut Session, p: &Value) -> Result<Value> {
     let st = s.doc()?;
-    let id = image_param(st, p, "links.goTo")?;
+    let id = linked_param(st, p, "links.goTo")?;
     let b = st.doc.node(id).and_then(Node::geometric_bounds).unwrap_or_default();
     s.select(|_, sel| sel.set([id]))?;
     Ok(json!({ "id": id.0, "bounds": [b.x0, b.y0, b.x1, b.y1] }))
@@ -775,9 +962,29 @@ fn go_to(s: &mut Session, p: &Value) -> Result<Value> {
 fn embed(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "links.embed";
     let st = s.doc()?;
-    let ids = images_param(st, p, C, |im| im.link.is_some())?;
+    let kind = |id: &NodeId| st.doc.node(*id).map(|n| &n.kind);
+    let linked = |id: &NodeId| match kind(id) {
+        Some(NodeKind::Image(im)) => im.link.is_some(),
+        Some(NodeKind::PlacedDocument(_)) => true,
+        _ => false,
+    };
+    let ids = ids_param(p, "ids").unwrap_or_else(|| st.selection.objects.iter().copied().filter(linked).collect());
+    if let Some(id) = ids.iter().find(|id| !matches!(kind(id), Some(NodeKind::Image(_) | NodeKind::PlacedDocument(_)))) {
+        return Err(bad(C, format!("object {} is not an image or a placed document", id.0)));
+    }
+    if ids.is_empty() {
+        return Err(bad(C, "select the linked images or placed documents, or pass ids"));
+    }
+    // Placed documents become editable copies of their art: those whose file can be read.
+    let (mut documents, mut missing) = (vec![], vec![]);
+    for id in ids.iter().copied() {
+        let Some(NodeKind::PlacedDocument(p)) = kind(&id) else { continue };
+        let readable = st.doc.images.get(&p.key).is_some_and(|b| vectorcraft_doc::placed_document::full_bytes(p, b).is_some());
+        if readable { documents.push(id) } else { missing.push(id) }
+    }
+    let ids: Vec<NodeId> = ids.into_iter().filter(|id| matches!(kind(id), Some(NodeKind::Image(_)))).collect();
     // Images showing their preview take their file's pixels first.
-    let (mut done, mut missing, mut reads) = (vec![], vec![], vec![]);
+    let (mut done, mut reads) = (vec![], vec![]);
     for g in groups(&st.doc, Some(&ids)) {
         if !previewing(&st.doc, &g.key) {
             done.extend(g.ids);
@@ -794,21 +1001,20 @@ fn embed(s: &mut Session, p: &Value) -> Result<Value> {
             _ => missing.extend(g.ids),
         }
     }
-    if !done.is_empty() {
+    if !done.is_empty() || !documents.is_empty() {
         s.edit("Embed", |d, _| {
             for (ids, read) in reads {
                 install(d, &ids, read, true)?;
             }
             for id in &done {
-                if let Some(n) = d.node_mut(*id)
-                    && let NodeKind::Image(im) = &mut n.kind
-                {
+                if let Some(Node { kind: NodeKind::Image(im), .. }) = d.node_mut(*id) {
                     im.link = None;
                 }
             }
-            Ok(())
+            documents.iter().try_for_each(|id| super::place::document::expand(d, *id, C))
         })?;
     }
+    done.extend(documents);
     Ok(json!({ "embedded": ids_json(&done), "missing": ids_json(&missing) }))
 }
 
@@ -862,41 +1068,77 @@ fn placement_json(o: PlacementOptions) -> Value {
     json!({ "preserve": o.preserve.id(), "align": o.align.id(), "clip": o.clip })
 }
 
+/// Link Info's fields of the linked file `l` (of object `id` of `st`) into `out`.
+fn file_fields(st: &crate::DocState, id: NodeId, l: &LinkInfo, out: &mut Value) {
+    let status = groups(&st.doc, Some(&[id])).first().map_or(Status::Missing, |g| probe(g, folder(st.path.as_deref())).0);
+    let stamp = file_stamp(&l.path);
+    let folder_len = l.path.len().saturating_sub(l.name().len());
+    out["status"] = json!(status.as_str());
+    out["path"] = json!(l.path);
+    out["fileName"] = json!(l.name());
+    out["location"] = json!(l.path.get(..folder_len).unwrap_or_default().trim_end_matches(['/', '\\']));
+    for (k, v) in [
+        ("page", l.page.map(u64::from)),
+        ("fileSize", stamp.map(|s| s.0).or(l.size)),
+        ("modified", stamp.and_then(|s| s.1).or(l.modified)),
+        ("created", file_created(&l.path)),
+    ] {
+        if let Some(v) = v {
+            out[k] = json!(v);
+        }
+    }
+}
+
+/// Scale (% of 100%, given points per unit at 100%) and counter-clockwise rotation of `xf`.
+fn scale_rotation(xf: Affine, (px, py): (f64, f64)) -> (Value, Value) {
+    let [a, b, c, d, ..] = xf.as_coeffs();
+    // Counter-clockwise on the page (y points down). Adding 0 turns -0 into 0.
+    (json!([a.hypot(b) / px * 100.0, c.hypot(d) / py * 100.0]), json!((-b).atan2(a).to_degrees() + 0.0))
+}
+
+/// Link Info of placed document `id`.
+fn placed_info(st: &crate::DocState, id: NodeId) -> Result<Value> {
+    let n = st.doc.node(id).ok_or(crate::EngineError::NoNode(id))?;
+    let NodeKind::PlacedDocument(pl) = &n.kind else { return Err(bad("links.info", format!("object {} is not a placed document", id.0))) };
+    let size = n.geometric_bounds().unwrap_or_default();
+    let (scale, rotation) = scale_rotation(pl.xf, (1.0, 1.0));
+    let mut out = document_row(pl);
+    let fields = [
+        ("id", json!(id.0)),
+        ("name", json!(n.display_name())),
+        ("linked", json!(true)),
+        ("link", json!(pl.link.path)),
+        ("width", json!(size.width())),
+        ("height", json!(size.height())),
+        ("scale", scale),
+        ("rotation", rotation),
+        ("placement", placement_json(pl.placement)),
+    ];
+    if let Some(o) = out.as_object_mut() {
+        o.extend(fields.into_iter().map(|(k, v)| (k.to_string(), v)));
+    }
+    file_fields(st, id, &pl.link, &mut out);
+    Ok(out)
+}
+
 fn info(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "links.info";
-    let id = image_param(s.doc()?, p, C)?;
+    let id = linked_param(s.doc()?, p, C)?;
+    if image_of(&s.doc()?.doc, id).is_none() {
+        return placed_info(s.doc()?, id);
+    }
     let mut out = super::place::image_info(s, &json!({ "id": id.0 }))?;
     let st = s.doc()?;
     let im = image_of(&st.doc, id).ok_or_else(|| bad(C, format!("object {} is not an image", id.0)))?;
     let (px, py) = file_pt(&st.doc, &im.key);
-    let [a, b, c, d, ..] = im.xf.as_coeffs();
     out["effectivePpi"] = out["ppi"].take();
     out["ppi"] = json!([72.0 / px, 72.0 / py]);
-    out["scale"] = json!([a.hypot(b) / px * 100.0, c.hypot(d) / py * 100.0]);
-    // Counter-clockwise on the page (y points down).
-    // Adding 0 turns -0 into 0.
-    out["rotation"] = json!((-b).atan2(a).to_degrees() + 0.0);
+    (out["scale"], out["rotation"]) = scale_rotation(im.xf, (px, py));
     out["format"] = json!(format_label(&st.doc, im));
     out["placement"] = placement_json(im.placement);
     out["status"] = json!("embedded");
     if let Some(l) = &im.link {
-        let status = groups(&st.doc, Some(&[id])).first().map_or(Status::Missing, |g| probe(g, folder(st.path.as_deref())).0);
-        let stamp = file_stamp(&l.path);
-        let folder_len = l.path.len().saturating_sub(l.name().len());
-        out["status"] = json!(status.as_str());
-        out["path"] = json!(l.path);
-        out["fileName"] = json!(l.name());
-        out["location"] = json!(l.path.get(..folder_len).unwrap_or_default().trim_end_matches(['/', '\\']));
-        for (k, v) in [
-            ("page", l.page.map(u64::from)),
-            ("fileSize", stamp.map(|s| s.0).or(l.size)),
-            ("modified", stamp.and_then(|s| s.1).or(l.modified)),
-            ("created", file_created(&l.path)),
-        ] {
-            if let Some(v) = v {
-                out[k] = json!(v);
-            }
-        }
+        file_fields(st, id, l, &mut out);
     }
     Ok(out)
 }
@@ -904,7 +1146,13 @@ fn info(s: &mut Session, p: &Value) -> Result<Value> {
 fn placement_options(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "links.placementOptions";
     let st = s.doc()?;
-    let ids = images_param(st, p, C, |_| true)?;
+    let ids = ids_param(p, "ids").unwrap_or_else(|| st.selection.objects.iter().copied().filter(|id| placement_of(&st.doc, *id).is_some()).collect());
+    if let Some(id) = ids.iter().find(|id| placement_of(&st.doc, **id).is_none()) {
+        return Err(bad(C, format!("object {} is not an image or a linked file", id.0)));
+    }
+    if ids.is_empty() {
+        return Err(bad(C, "select the images, or pass ids"));
+    }
     let choice = |k: &str| -> Result<Option<&str>> {
         match p.get(k) {
             None | Some(Value::Null) => Ok(None),
@@ -918,7 +1166,7 @@ fn placement_options(s: &mut Session, p: &Value) -> Result<Value> {
         None | Some(Value::Null) => None,
         Some(v) => Some(v.as_bool().ok_or_else(|| bad(C, "clip must be true or false"))?),
     };
-    let first = ids.first().and_then(|id| image_of(&st.doc, *id)).map(|im| im.placement).unwrap_or_default();
+    let first = ids.first().and_then(|id| placement_of(&st.doc, *id)).unwrap_or_default();
     if preserve.is_none() && align.is_none() && clip.is_none() {
         return Ok(json!({ "placement": placement_json(first) }));
     }
@@ -929,10 +1177,8 @@ fn placement_options(s: &mut Session, p: &Value) -> Result<Value> {
     };
     s.edit("Placement Options", |d, _| {
         for id in &ids {
-            if let Some(n) = d.node_mut(*id)
-                && let NodeKind::Image(im) = &mut n.kind
-            {
-                set(&mut im.placement);
+            if let Some(o) = d.node_mut(*id).and_then(placement_mut) {
+                set(o);
             }
         }
         Ok(())

crates/engine/src/cmd/mod.rs

@@ -48,7 +48,7 @@ mod pathops;
 mod patterncmds;
 pub mod pdfcmds;
 pub mod perspgrid;
-mod place;
+pub(crate) mod place;
 pub mod plugin;
 pub mod prefscmds;
 pub mod print;
@@ -59,6 +59,7 @@ pub mod rasterfx;
 mod recolor;
 pub mod recovery;
 mod select;
+pub(crate) mod shaper;
 pub(crate) mod slices;
 mod stroke;
 mod style;
@@ -231,6 +232,7 @@ pub fn command_specs() -> &'static [CommandSpec] {
         v.extend(docinfo::specs());
         v.extend(panelcmds::specs());
         v.extend(buildcmds::specs());
+        v.extend(shaper::specs());
         v.extend(brushsym::specs());
         v.extend(patterncmds::specs());
         v.extend(prefscmds::specs());

crates/engine/src/cmd/object.rs

@@ -150,7 +150,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Object Properties",
             [],
             None,
-            "{ids?|id?, name?, visible?, locked?, opacity?: 0..100, blend?: \"Multiply\"…, isolate?, knockout?: \"on\"|\"off\"|\"neutral\"|bool (true = on, false = neutral), knockoutShape?: bool}",
+            "{ids?|id?, name?, visible?, locked?, opacity?: 0..100, blend?: \"Multiply\"…, isolate?, knockout?: \"on\"|\"off\"|\"neutral\"|bool (true = on, false = neutral), knockoutShape?: bool, data?: {key: \"value\" | null (removes it)} (the object's own data, SVG data-* attributes: {pivot: \"100,180\"} is data-pivot; document.node → attrs.data)}",
             has_doc,
             set_props
         ),
@@ -159,7 +159,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Align",
             ["Window", "Align"],
             None,
-            "{horizontal?: \"left\"|\"center\"|\"right\", vertical?: \"top\"|\"center\"|\"bottom\", to?: \"selection\"|\"artboard\"|\"key\", bounds?: \"preview\"|\"geometric\" (default: the Use Preview Bounds preference; preview bounds take in strokes)}",
+            "{horizontal?: \"left\"|\"center\"|\"right\", vertical?: \"top\"|\"center\"|\"bottom\", to?: \"selection\"|\"artboard\"|\"key\" (default: the key object when the selection has one, select.key, else the selection), bounds?: \"preview\"|\"geometric\" (default: the Use Preview Bounds preference; preview bounds take in strokes)}",
             has_selection,
             align
         ),
@@ -177,7 +177,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Distribute Spacing",
             ["Window", "Align"],
             None,
-            "{axis: \"horizontal\"|\"vertical\", spacing?: pt, bounds?: \"preview\"|\"geometric\" (default: the Use Preview Bounds preference; preview bounds take in strokes)}",
+            "{axis: \"horizontal\"|\"vertical\", spacing?: pt (the key object, select.key, stays put and the others are spaced from it), bounds?: \"preview\"|\"geometric\" (default: the Use Preview Bounds preference; preview bounds take in strokes)}",
             has_multi,
             distribute_spacing
         ),
@@ -722,7 +722,8 @@ fn isolate(s: &mut Session, p: &Value) -> Result<Value> {
     if st.doc.node(id).is_none_or(|n| !n.is_container()) {
         return Err(bad("object.isolate", "only groups and layers can be isolated"));
     }
-    st.isolation = Some(id);
+    let isolation = st.doc.node(id).filter(|n| n.shaper.is_some()).and_then(|n| n.children()).and_then(|c| c.first()).map_or(id, |n| n.id);
+    st.isolation = Some(isolation);
     st.selection.clear();
     st.revision += 1;
     ok()
@@ -732,12 +733,39 @@ fn exit_isolation(s: &mut Session, _: &Value) -> Result<Value> {
     let st = s.doc_mut()?;
     if let Some(i) = st.isolation.take() {
         super::distortcmds::finish_edit_text(st, i);
-        st.selection.set([i]);
+        let target = st.doc.parent_of(i).filter(|p| st.doc.node(*p).is_some_and(|n| n.shaper.is_some())).unwrap_or(i);
+        st.selection.set([target]);
     }
     st.revision += 1;
     ok()
 }
 
+/// The most data entries `object.setProps` takes at once.
+const MAX_DATA: usize = 256;
+
+/// `object.setProps`'s `data`: each key (a data-* attribute's name: letters, digits, `-`, `_`,
+/// `.`) with its value, or `None` to remove it.
+fn data_param(m: &serde_json::Map<String, Value>) -> Result<Vec<(String, Option<String>)>> {
+    const C: &str = "object.setProps";
+    if m.len() > MAX_DATA {
+        return Err(bad(C, format!("data takes at most {MAX_DATA} keys at once")));
+    }
+    m.iter()
+        .map(|(k, v)| {
+            let k = k.strip_prefix("data-").unwrap_or(k);
+            if k.is_empty() || !k.chars().all(|c| c.is_ascii_alphanumeric() || matches!(c, '-' | '_' | '.')) || k == "name" || k.starts_with("vc-") {
+                return Err(bad(C, format!("data key `{k}`: letters, digits, -, _ and . (not name or vc-…)")));
+            }
+            let v = match v {
+                Value::Null => None,
+                Value::String(s) => Some(s.clone()),
+                other => Some(other.to_string()),
+            };
+            Ok((k.to_string(), v))
+        })
+        .collect()
+}
+
 fn set_props(s: &mut Session, p: &Value) -> Result<Value> {
     let ids = targets(s, p)?;
     let opacity = p.get("opacity").and_then(Value::as_f64).map(percent);
@@ -745,6 +773,11 @@ fn set_props(s: &mut Session, p: &Value) -> Result<Value> {
         Some(b) => Some(BlendMode::parse(b).ok_or_else(|| bad("object.setProps", format!("unknown blend mode `{b}`")))?),
         None => None,
     };
+    let data = match p.get("data") {
+        None | Some(Value::Null) => None,
+        Some(Value::Object(m)) => Some(data_param(m)?),
+        Some(v) => return Err(bad("object.setProps", format!("data must be an object of key: value, not {v}"))),
+    };
     let knockout = match p.get("knockout") {
         Some(v) => Some(
             Knockout::from_value(v)
@@ -779,6 +812,24 @@ fn set_props(s: &mut Session, p: &Value) -> Result<Value> {
             if let Some(v) = p.get("knockoutShape").and_then(Value::as_bool) {
                 n.knockout_shape = v;
             }
+            if let Some(changes) = &data {
+                n.edit_attrs(|a| {
+                    for (k, v) in changes {
+                        match (a.data.iter().position(|(key, _)| key == k), v) {
+                            (Some(i), Some(v)) => {
+                                if let Some(e) = a.data.get_mut(i) {
+                                    e.1 = v.clone();
+                                }
+                            }
+                            (Some(i), None) => {
+                                a.data.remove(i);
+                            }
+                            (None, Some(v)) => a.data.push((k.clone(), v.clone())),
+                            (None, None) => {}
+                        }
+                    }
+                });
+            }
         }
         Ok(())
     })?;
@@ -813,9 +864,15 @@ fn items_bounds(d: &Document, ids: &[NodeId], preview: bool) -> Vec<(NodeId, Rec
     ids.iter().filter_map(|id| Some((*id, d.bounds_of(&[*id], preview)?))).collect()
 }
 
+/// What `object.align` aligns to: `to`, else the key object when there is one, else the
+/// selection.
+fn align_to<'a>(s: &Session, p: &'a Value) -> Option<&'a str> {
+    str_param(p, "to").or_else(|| s.doc().ok()?.selection.key.map(|_| "key"))
+}
+
 fn reference_rect(s: &Session, p: &Value, ids: &[NodeId], preview: bool) -> Result<Rect> {
     let st = s.doc()?;
-    match str_param(p, "to") {
+    match align_to(s, p) {
         Some("artboard") => {
             let b = st.doc.bounds_of(ids, preview).unwrap_or_default();
             let i = st.doc.artboard_at(b.center()).unwrap_or(0);
@@ -840,7 +897,7 @@ fn align(s: &mut Session, p: &Value) -> Result<Value> {
         let d = &s.doc()?.doc;
         items_bounds(d, &ids, preview)
             .into_iter()
-            .filter(|(id, _)| Some(*id) != key || str_param(p, "to") != Some("key"))
+            .filter(|(id, _)| Some(*id) != key || align_to(s, p) != Some("key"))
             .map(|(id, b)| {
                 let dx = match h {
                     Some("left") => r.x0 - b.x0,
@@ -926,22 +983,31 @@ fn distribute_spacing(s: &mut Session, p: &Value) -> Result<Value> {
     let mut items = items_bounds(&s.doc()?.doc, &ids, preview);
     items.sort_by(|a, b| if horiz { a.1.x0.total_cmp(&b.1.x0) } else { a.1.y0.total_cmp(&b.1.y0) });
     let n = items.len();
+    let &[(_, first), .., (_, last)] = items.as_slice() else {
+        return Err(EngineError::Other("select two or more objects to distribute".into()));
+    };
     let size = |r: &Rect| if horiz { r.width() } else { r.height() };
     let start = |r: &Rect| if horiz { r.x0 } else { r.y0 };
-    let gap = match p.get("spacing").and_then(Value::as_f64) {
+    let spacing = p.get("spacing").and_then(Value::as_f64).filter(|g| g.is_finite());
+    let gap = match spacing {
         Some(g) => g,
         None => {
-            let span = if horiz { items[n - 1].1.x1 - items[0].1.x0 } else { items[n - 1].1.y1 - items[0].1.y0 };
+            let span = if horiz { last.x1 - first.x0 } else { last.y1 - first.y0 };
             (span - items.iter().map(|i| size(&i.1)).sum::<f64>()) / (n - 1) as f64
         }
     };
-    let mut pos = start(&items[0].1);
-    let mut moves = vec![];
+    let mut pos = start(&first);
+    let mut deltas = vec![];
     for (id, r) in &items {
-        let delta = pos - start(r);
-        moves.push((*id, if horiz { Vec2::new(delta, 0.0) } else { Vec2::new(0.0, delta) }));
+        deltas.push((*id, pos - start(r)));
         pos += size(r) + gap;
     }
+    // With a spacing (aligning to a key object) the key object stays where it is: the others
+    // are spaced from it.
+    let key = s.doc()?.selection.key;
+    let fixed = spacing.and_then(|_| deltas.iter().find(|(id, _)| Some(*id) == key)).map_or(0.0, |k| k.1);
+    let moves: Vec<(NodeId, Vec2)> =
+        deltas.into_iter().map(|(id, d)| (id, if horiz { Vec2::new(d - fixed, 0.0) } else { Vec2::new(0.0, d - fixed) })).collect();
     s.edit("Distribute Spacing", |d, _| {
         for (id, dv) in &moves {
             if let Some(n) = d.node_mut(*id) {

crates/engine/src/cmd/panelcmds.rs

@@ -2,7 +2,7 @@
 //! Character/Paragraph attributes.
 
 use serde_json::{Value, json};
-use vectorcraft_doc::NodeKind;
+use vectorcraft_doc::{Composer, NodeKind};
 use vectorcraft_geom::{Rect, Vec2};
 
 use super::*;
@@ -43,7 +43,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Character / Paragraph",
             [],
             None,
-            "{ids?|id?, kerning?: 1/1000 em|\"auto\", baselineShift?: pt, hScale?: %, vScale?: %, rotation?: deg, underline?, strikethrough?, allCaps?, smallCaps?: bool, position?: \"normal\"|\"superscript\"|\"subscript\" (sizes from Document Setup), leftIndent?, rightIndent?, firstLineIndent?, spaceBefore?, spaceAfter?: pt, hyphenate?: bool, mojikumi?: \"none\"|\"lineEndHalf\" (Japanese punctuation spacing), direction?: \"auto\"|\"leftToRight\"|\"rightToLeft\" (paragraph direction; auto: from each paragraph's first strong character), leadingModel?: \"romanBaseline\"|\"emBoxTop\" (leading measured baseline to baseline, or em box top to top), charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\" (where characters smaller than the largest on their line line up with it), burasagari?: \"none\"|\"standard\"|\"forced\" (Paragraph panel menu › Burasagari None/Regular/Force: an East Asian comma or full stop ending an area type line hangs outside it: when it doesn't fit, or always; new type: \"standard\")}",
+            "{ids?|id?, kerning?: 1/1000 em|\"auto\", baselineShift?: pt, hScale?: %, vScale?: %, rotation?: deg, underline?, strikethrough?, allCaps?, smallCaps?: bool, position?: \"normal\"|\"superscript\"|\"subscript\" (sizes from Document Setup), leftIndent?, rightIndent?, firstLineIndent?, spaceBefore?, spaceAfter?: pt (±1296), hyphenate?: bool, mojikumi?: \"none\"|\"lineEndHalf\" (Japanese punctuation spacing), direction?: \"auto\"|\"leftToRight\"|\"rightToLeft\" (paragraph direction; auto: from each paragraph's first strong character), leadingModel?: \"romanBaseline\"|\"emBoxTop\" (leading measured baseline to baseline, or em box top to top), charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\" (where characters smaller than the largest on their line line up with it), burasagari?: \"none\"|\"standard\"|\"forced\" (Paragraph panel menu › Burasagari None/Regular/Force: an East Asian comma or full stop ending an area type line hangs outside it: when it doesn't fit, or always; new type: \"standard\"), composer?: \"singleLine\"|\"everyLine\" (line breaking, Every-line by default), start?: byte, end?: byte} (with a range: the character attributes style that range and the paragraph attributes apply to the paragraphs it touches; without: all the text)",
             has_doc,
             set_format
         ),
@@ -180,6 +180,9 @@ pub(crate) fn push_artboard_copy(d: &mut vectorcraft_doc::Document, src: &vector
 
 // ---------- text ----------
 
+/// Largest indent or paragraph spacing (points; Illustrator's limit).
+const MAX_PARA: f64 = 1296.0;
+
 fn set_format(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "text.setFormat";
     let ids: Vec<NodeId> = {
@@ -219,10 +222,19 @@ fn set_format(s: &mut Session, p: &Value) -> Result<Value> {
         "leadingModel",
         "charAlign",
         "burasagari",
+        "composer",
     ];
     if !keys.iter().any(|k| p.get(*k).is_some()) {
         return Err(bad(C, "nothing to change"));
     }
+    let composer = match p.get("composer") {
+        None | Some(Value::Null) => None,
+        Some(v) => Some(match v.as_str() {
+            Some("singleLine") => Composer::SingleLine,
+            Some("everyLine") => Composer::EveryLine,
+            _ => return Err(bad(C, "composer must be \"singleLine\" or \"everyLine\"")),
+        }),
+    };
     let (position, small_caps) = super::docsetup::script_params(p, &s.doc()?.doc.setup, C)?;
     let char_align = super::textedit::char_align_param(p, C)?;
     let mojikumi = match p.get("mojikumi") {
@@ -259,11 +271,11 @@ fn set_format(s: &mut Session, p: &Value) -> Result<Value> {
             _ => return Err(bad(C, "`burasagari` must be \"none\", \"standard\" or \"forced\"")),
         }),
     };
+    let range = super::typecmd::TextRange::parse(p, C)?;
     s.edit("Character", |d, _| {
         for id in &ids {
             let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) else { continue };
-            for r in &mut t.runs {
-                let st = &mut r.style;
+            super::typecmd::style_chars(t, range, |st| {
                 if let Some(k) = kerning {
                     st.kerning = k;
                 }
@@ -297,38 +309,43 @@ fn set_format(s: &mut Session, p: &Value) -> Result<Value> {
                 if let Some(v) = char_align {
                     st.char_align = v;
                 }
-            }
-            let para = &mut t.para;
-            if let Some(v) = num("leftIndent") {
-                para.left_indent = v;
-            }
-            if let Some(v) = num("rightIndent") {
-                para.right_indent = v;
-            }
-            if let Some(v) = num("firstLineIndent") {
-                para.first_line_indent = v;
-            }
-            if let Some(v) = num("spaceBefore") {
-                para.space_before = v;
-            }
-            if let Some(v) = num("spaceAfter") {
-                para.space_after = v;
-            }
-            if let Some(v) = flag("hyphenate") {
-                para.hyphenate = v;
-            }
-            if let Some(v) = mojikumi {
-                para.mojikumi = v;
-            }
-            if let Some(v) = direction {
-                para.direction = v;
-            }
-            if let Some(v) = leading_model {
-                para.leading_model = v;
-            }
-            if let Some(v) = burasagari {
-                para.burasagari = v;
-            }
+            });
+            let span = super::typecmd::para_span(range, t);
+            t.edit_paras(span, |para| {
+                if let Some(v) = num("leftIndent") {
+                    para.left_indent = v.clamp(-MAX_PARA, MAX_PARA);
+                }
+                if let Some(v) = num("rightIndent") {
+                    para.right_indent = v.clamp(-MAX_PARA, MAX_PARA);
+                }
+                if let Some(v) = num("firstLineIndent") {
+                    para.first_line_indent = v.clamp(-MAX_PARA, MAX_PARA);
+                }
+                if let Some(v) = num("spaceBefore") {
+                    para.space_before = v.clamp(-MAX_PARA, MAX_PARA);
+                }
+                if let Some(v) = num("spaceAfter") {
+                    para.space_after = v.clamp(-MAX_PARA, MAX_PARA);
+                }
+                if let Some(v) = flag("hyphenate") {
+                    para.hyphenate = v;
+                }
+                if let Some(v) = mojikumi {
+                    para.mojikumi = v;
+                }
+                if let Some(v) = direction {
+                    para.direction = v;
+                }
+                if let Some(v) = leading_model {
+                    para.leading_model = v;
+                }
+                if let Some(v) = burasagari {
+                    para.burasagari = v;
+                }
+                if let Some(v) = composer {
+                    para.composer = v;
+                }
+            });
             super::typecmd::refresh_bounds(t);
         }
         Ok(())

crates/engine/src/cmd/place/adopt.rs

@@ -67,6 +67,7 @@ fn refs(n: &mut Node, f: &mut impl FnMut(Ref)) {
                 }
             }
             NodeKind::Image(im) => f(Ref::Image(&mut im.key)),
+            NodeKind::PlacedDocument(pl) => f(Ref::Image(&mut pl.key)),
             NodeKind::SymbolInstance { symbol, .. } => f(Ref::Symbol(symbol)),
             _ => {}
         }
@@ -129,7 +130,7 @@ fn copies(m: &Renames) -> Vec<(&str, &str)> {
 
 /// Bring the resources `nodes` (art from `src`) use into `dst`, renaming on conflict, and point
 /// `nodes` at the names they got.
-pub(super) fn adopt(dst: &mut Document, src: &Document, nodes: &mut [Node]) {
+pub(crate) fn adopt(dst: &mut Document, src: &Document, nodes: &mut [Node]) {
     let mut used = Used::default();
     for n in nodes.iter_mut() {
         refs(n, &mut |r| used.note(r));

crates/engine/src/cmd/place/document.rs

@@ -0,0 +1,273 @@
+//! Placed documents (`file.place` of a VectorCraft document from a file, with `link`): one
+//! locked object showing an artboard of the document, a [`PlacedDocument`].
+//!
+//! The object keeps the file's bytes (in the document's images, like image data) and the link; the
+//! art it shows is read from them the way placing the file without Link reads it
+//! ([`document_art`]: the artboard's art, with the file's own linked images found), so Break Link
+//! and Object › Expand ([`expand`]) give exactly that editable copy. The Links commands
+//! ([`super::super::links`]) tell when the file changed and read it again.
+//!
+//! Each placed file also gets a preview ([`PREVIEW_PX_PER_PT`]; JPEG when opaque, else PNG), kept
+//! as the blob's [`ImageBlob::proxy`]: a save writes only the preview (unless Include Linked
+//! Files), as for linked images. The file is read again when it is needed ([`read_file_again`]:
+//! output, or the screen zoomed past the preview), while it is unchanged, and output falls back to
+//! the preview with a warning when it can't be ([`full_documents`]).
+
+use std::borrow::Cow;
+use std::collections::BTreeSet;
+use std::sync::Arc;
+
+use vectorcraft_doc::links::hash_bytes;
+use vectorcraft_doc::placed_document::{PREVIEW_MAX, PREVIEW_PX_PER_PT, key_for};
+use vectorcraft_doc::{Document, ImageBlob, LinkInfo, Node, NodeKind, PlacedDocument, PlacementOptions};
+use vectorcraft_geom::{Affine, Rect};
+
+use super::super::fileio;
+use super::super::*;
+
+/// The largest file placed (bytes).
+pub(crate) const MAX_FILE: usize = 256 << 20;
+/// The format ids of VectorCraft documents.
+const NATIVE: [&str; 2] = ["vectorcraft", "template"];
+/// The type a placed file's bytes are stored with.
+const MIME: &str = "application/json";
+
+/// Is `name` with `bytes` a VectorCraft document?
+pub(crate) fn is_native(name: &str, bytes: &[u8]) -> bool {
+    fileio::detect(name, bytes).is_some_and(|f| NATIVE.contains(&f.id))
+}
+
+/// An artboard of a VectorCraft document, read as art to place.
+pub(crate) struct DocumentArt {
+    /// The document, its layers taken: the art's resources.
+    pub doc: Document,
+    /// The art on the artboard (guides, hidden and template layers left out).
+    pub nodes: Vec<Node>,
+    /// The artboard the art is clipped to (`None`: the art's bounds are shown).
+    pub clip: Option<Rect>,
+    /// What is shown: the artboard, or the art's bounds.
+    pub frame: Rect,
+    pub warnings: Vec<String>,
+}
+
+/// Artboard `page` (1-based) of the VectorCraft document `name` (`bytes`, read from `path` when
+/// there is one, so its linked images are found), clipped to the artboard unless `bounding`.
+pub(crate) fn document_art(name: &str, bytes: &[u8], path: Option<&str>, page: u32, bounding: bool, cmd: &str) -> Result<DocumentArt> {
+    let file = fileio::file_name(name);
+    if !is_native(name, bytes) {
+        return Err(bad(cmd, format!("`{file}` isn't a VectorCraft document")));
+    }
+    if bytes.len() > MAX_FILE {
+        return Err(bad(cmd, format!("`{file}` is over {} MB", MAX_FILE >> 20)));
+    }
+    let mut l = fileio::load(name, bytes)?;
+    // Its linked images show their files; its placed documents stay as they are.
+    super::super::links::resolve(&mut l.doc, path, false);
+    l.doc.drop_edit_modes();
+    let n = l.doc.artboards.len();
+    let board = (page as usize).checked_sub(1).and_then(|i| l.doc.artboards.get(i)).map(|a| a.rect);
+    let board = board.ok_or_else(|| bad(cmd, format!("page {page}: `{file}` has {n} artboard(s)")))?;
+    let layers = std::mem::take(&mut l.doc.layers);
+    let nodes = super::on_artboard(&layers, board);
+    let frame = if bounding { nodes.iter().fold(None, |acc, n| vectorcraft_geom::union_opt(acc, n.visual_bounds())) } else { Some(board) };
+    let frame = frame.filter(|r| r.width() > 0.0 || r.height() > 0.0).ok_or_else(|| bad(cmd, format!("`{file}` has no art to place")))?;
+    Ok(DocumentArt { doc: l.doc, nodes, clip: (!bounding).then_some(board), frame, warnings: l.warnings })
+}
+
+/// `nodes` as one group, clipped to `clip` (its own ids: what drawing reads).
+fn group(nodes: Vec<Node>, clip: Option<Rect>) -> Node {
+    let mut children: Vec<Arc<Node>> = nodes.into_iter().map(Arc::new).collect();
+    if let Some(r) = clip {
+        children.insert(0, Arc::new(super::clip_path(NodeId(0), r)));
+    }
+    Node::new(NodeId(0), NodeKind::Group { children, clip: clip.is_some() })
+}
+
+/// `p`'s file (`bytes`) read as the art it shows: how the document model reads placed documents
+/// ([`vectorcraft_doc::placed_document::set_loader`]).
+pub(crate) fn read_document(p: &PlacedDocument, bytes: &[u8]) -> Option<(Document, Node, Rect)> {
+    let a = document_art(p.link.name(), bytes, Some(&p.link.path), p.page(), p.bounding, "draw").ok()?;
+    Some((a.doc, group(a.nodes, a.clip), a.frame))
+}
+
+/// `p`'s file read again, while it is the file it was read from (how the document model gets it
+/// when only the preview is stored, [`vectorcraft_doc::placed_document::set_file_reader`]).
+pub(crate) fn read_file_again(p: &PlacedDocument) -> Option<Vec<u8>> {
+    let bytes = fileio::read_file(&p.link.path).ok()?;
+    if p.link.hash.as_ref().is_some_and(|h| *h != hash_bytes(&bytes)) {
+        return None;
+    }
+    Some(bytes)
+}
+
+/// A VectorCraft document read for placing linked.
+#[derive(Clone)]
+pub(crate) struct Source {
+    /// The file's bytes, with their preview.
+    pub blob: ImageBlob,
+    /// The blob's key ([`key_for`]).
+    pub key: String,
+    /// What is shown, in the file's coordinates: the artboard or the art's bounds.
+    pub frame: Rect,
+    pub warnings: Vec<String>,
+}
+
+/// The VectorCraft document `name` (`bytes`, from `path` when there is one) read for showing
+/// artboard `page` (its art's bounds when `bounding`).
+pub(crate) fn source(name: &str, bytes: &[u8], path: Option<&str>, page: u32, bounding: bool, cmd: &str) -> Result<Source> {
+    // The same document placed the same way is read once (placing it again is free).
+    let key = key_for(&hash_bytes(bytes), page, bounding);
+    if let Some(s) = lock_memo().iter().find(|s| s.key == key).cloned() {
+        return Ok(s);
+    }
+    let a = document_art(name, bytes, path, page, bounding, cmd)?;
+    let mut blob = ImageBlob::new(MIME, bytes.to_vec());
+    let shown = PlacedDocument {
+        link: LinkInfo { page: Some(page), ..LinkInfo::new(path.unwrap_or(name)) },
+        key: key.clone(),
+        bounding,
+        width: a.frame.width(),
+        height: a.frame.height(),
+        xf: Affine::IDENTITY,
+        placement: PlacementOptions::default(),
+    };
+    let art = group(a.nodes, a.clip);
+    blob.proxy = preview(&a.doc, &art, a.frame).map(Arc::new);
+    // Drawing it needn't read it again.
+    vectorcraft_doc::placed_document::prime(&shown, blob.bytes.clone(), (a.doc, art, a.frame));
+    let s = Source { blob, key, frame: a.frame, warnings: a.warnings };
+    let mut m = lock_memo();
+    if m.len() >= MEMO_SIZE {
+        m.remove(0);
+    }
+    m.push(s.clone());
+    Ok(s)
+}
+
+/// The most files remembered.
+const MEMO_SIZE: usize = 32;
+
+/// Files read lately for placing, by key.
+static MEMO: std::sync::Mutex<Vec<Source>> = std::sync::Mutex::new(Vec::new());
+
+fn lock_memo() -> std::sync::MutexGuard<'static, Vec<Source>> {
+    // Entries are only pushed and removed: a panic while held leaves it whole.
+    MEMO.lock().unwrap_or_else(std::sync::PoisonError::into_inner)
+}
+
+/// The preview of `art` (of document `doc`, showing `frame`): [`PREVIEW_PX_PER_PT`], at most
+/// [`PREVIEW_MAX`] pixels a side; JPEG when opaque (inside its outer pixels), else PNG.
+fn preview(doc: &Document, art: &Node, frame: Rect) -> Option<Vec<u8>> {
+    let k = PREVIEW_PX_PER_PT.min(PREVIEW_MAX as f64 / frame.width().max(frame.height()).max(1e-9));
+    let side = |v: f64| (v * k).round().clamp(1.0, PREVIEW_MAX as f64) as u32;
+    let (w, h) = (side(frame.width()), side(frame.height()));
+    let view = Affine::scale_non_uniform(w as f64 / frame.width().max(1e-9), h as f64 / frame.height().max(1e-9))
+        * Affine::translate((-frame.x0, -frame.y0));
+    let mut r = vectorcraft_render::Renderer::new();
+    let img = vectorcraft_render::placed_document::render_inside(&mut r, doc, &Arc::new(art.clone()), w as u16, h as u16, view)?;
+    // Premultiplied → straight.
+    let px = img
+        .pixels
+        .as_chunks::<4>()
+        .0
+        .iter()
+        .flat_map(|&[r, g, b, a]| {
+            let un = |c: u8| if a == 0 { 0 } else { ((c as u32 * 255 + a as u32 / 2) / a as u32).min(255) as u8 };
+            [un(r), un(g), un(b), a]
+        })
+        .collect();
+    let rgba = image::RgbaImage::from_raw(w, h, px)?;
+    let mut out = vec![];
+    // Opaque but for the edge's anti-aliasing (an artboard drawn to whole pixels) and compositing's
+    // rounding: JPEG.
+    let inner = |x: u32, y: u32| x > 0 && y > 0 && x + 1 < w && y + 1 < h;
+    if rgba.enumerate_pixels().all(|(x, y, p)| p[3] >= 250 || !inner(x, y)) {
+        let rgb = image::DynamicImage::ImageRgba8(rgba).to_rgb8();
+        image::codecs::jpeg::JpegEncoder::new_with_quality(&mut out, 80).encode_image(&rgb).ok()?;
+    } else {
+        rgba.write_to(&mut std::io::Cursor::new(&mut out), image::ImageFormat::Png).ok()?;
+    }
+    Some(out)
+}
+
+/// `s` stored in `d` (objects showing the same thing share one blob).
+pub(crate) fn store(d: &mut Document, s: &Source) {
+    d.images.entry(s.key.clone()).or_insert_with(|| s.blob.clone());
+}
+
+/// A new placed document of `d` showing `s` at 100%, where its art lies in the file.
+pub(crate) fn node(d: &mut Document, s: &Source, link: LinkInfo, bounding: bool) -> Node {
+    store(d, s);
+    let placed = PlacedDocument {
+        link,
+        key: s.key.clone(),
+        bounding,
+        width: s.frame.width(),
+        height: s.frame.height(),
+        xf: Affine::translate((s.frame.x0, s.frame.y0)),
+        placement: PlacementOptions::default(),
+    };
+    Node::new(d.alloc_id(), NodeKind::PlacedDocument(Box::new(placed)))
+}
+
+/// `d` for output: the placed documents that keep only their previews get their files back,
+/// else (their files gone or changed) output as their previews, with a warning.
+pub(crate) fn full_documents(d: &Document) -> (Cow<'_, Document>, Vec<String>) {
+    let mut need: Vec<PlacedDocument> = vec![];
+    d.visit_placed(|_, p| {
+        if d.images.get(&p.key).is_some_and(ImageBlob::is_proxy) && !need.iter().any(|n| n.key == p.key) {
+            need.push(p.clone());
+        }
+    });
+    if need.is_empty() {
+        return (Cow::Borrowed(d), vec![]);
+    }
+    let mut out = d.clone();
+    let mut previews = BTreeSet::new();
+    for p in need {
+        let Some(blob) = d.images.get(&p.key) else { continue };
+        match vectorcraft_doc::placed_document::full_bytes(&p, blob) {
+            Some(bytes) => {
+                out.images.insert(p.key.clone(), ImageBlob { mime: MIME.into(), bytes, proxy: blob.proxy.clone() });
+            }
+            None => {
+                previews.insert(p.key);
+            }
+        }
+    }
+    let mut warnings = vec![];
+    if !previews.is_empty() {
+        warnings.push(format!(
+            "{} placed document(s) output as their previews: their files can't be found, or changed since they were read (relink or update them)",
+            previews.len()
+        ));
+        out.placed_as_previews(&previews);
+    }
+    (Cow::Owned(out), warnings)
+}
+
+/// Placed document `id` of `d` replaced by an editable copy of its art, as placing its file
+/// without Link gives (its resources joining `d`, renamed where `d` uses a name for something
+/// else), keeping the object's id, place, name and transparency: Break Link and Object › Expand.
+pub(crate) fn expand(d: &mut Document, id: NodeId, cmd: &str) -> Result<()> {
+    let n = d.node(id).cloned().ok_or(EngineError::NoNode(id))?;
+    let NodeKind::PlacedDocument(p) = &n.kind else { return Err(bad(cmd, format!("object {} is not a placed document", id.0))) };
+    let blob = d.images.get(&p.key).ok_or_else(|| bad(cmd, format!("object {} has lost its file's contents: relink it", id.0)))?;
+    let bytes = vectorcraft_doc::placed_document::full_bytes(p, blob)
+        .ok_or_else(|| bad(cmd, format!("{} can't be read, or changed since it was read: relink or update it first", p.link.path)))?;
+    let a = document_art(p.link.name(), &bytes, Some(&p.link.path), p.page(), p.bounding, cmd)?;
+    let m = p.art_xf(a.frame).ok_or_else(|| bad(cmd, format!("object {} has no size", id.0)))?;
+    let mut nodes = a.nodes;
+    super::adopt::adopt(d, &a.doc, &mut nodes);
+    let mut children: Vec<Arc<Node>> = nodes.iter().map(|n| Arc::new(d.reid(n))).collect();
+    if let Some(r) = a.clip {
+        children.insert(0, Arc::new(super::clip_path(d.alloc_id(), r)));
+    }
+    let art = super::transformed(Node::new(d.alloc_id(), NodeKind::Group { children, clip: a.clip.is_some() }), m);
+    let mut out = n.clone();
+    out.kind = art.kind;
+    let (par, index, _) = d.position(id).ok_or(EngineError::NoNode(id))?;
+    d.remove(id)?;
+    d.insert(par, index, out)?;
+    Ok(())
+}

crates/engine/src/cmd/place/mod.rs

@@ -16,13 +16,17 @@
 //!   (`crop: "bounding"`).
 //! - A text file becomes area type, decoded and cleaned up with the Text Import Options (`text`,
 //!   [`text`]).
+//! - A VectorCraft document placed from a file with Link (the default) becomes a placed document:
+//!   one locked object showing the artboard `page`, linked to the file and read again when it
+//!   changes ([`document`]); without Link, an editable copy of its art.
 //!
 //! The art lands centred on `at`, fitted into `rect`, or (Replace) where the replaced object was,
 //! with its transform; Template puts it on a new template layer. The images, symbols, patterns and
 //! swatches it uses join the document ([`adopt`]). `file.place.queue` loads the place cursor (the
 //! `place` tool) with several files, which emits one `file.place` per click or drag.
 
-mod adopt;
+pub(crate) mod adopt;
+pub(crate) mod document;
 mod text;
 
 use std::sync::Arc;
@@ -53,7 +57,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Place…",
             ["File"],
             Some("Cmd+Shift+P"),
-            "{path | name+dataBase64, link?: true (a raster image keeps its file's path; other files are embedded), text?: {characterSet?: \"unicode\" (UTF-8, or UTF-16 with a byte-order mark; other bytes as the platform's 8-bit set) | \"ansi\" (the platform's 8-bit set), platform?: \"windows\" (Windows-1252) | \"mac\" (Mac Roman), removeLineReturns?: false (each block of lines becomes one paragraph; blank lines end paragraphs), removeParagraphReturns?: false (drop blank lines), replaceSpaces?: n (runs of n ≥ 2 spaces become a tab)} (a .txt file, placed as area type filling rect, the replaced object's bounds, or else the artboard less a 36 pt margin), template?: false (onto a new locked template layer below the current layer), replace?: false (swap the one selected object, keeping its stacking place and transform; no at/rect), at?: [x, y] centre (default: the first artboard's centre), rect?: [x, y, width, height] fit inside, aspect kept (wins over at), page?: 1 (PDF/.ai page, or a native document's artboard), crop?: \"crop\" (clipped to that page or artboard, default) | \"bounding\" (the art's bounds) | \"art\" | \"trim\" | \"bleed\" | \"media\" (a PDF page's boxes), password? (an encrypted PDF), dxf?: {…the DXF options of document.open} (a .dxf drawing: fit fills the artboard under at, else the first; fitted or uncentred art lands with its drawing's artboard on that artboard, else it is centred on at)} → {ids, name, format, linked, width, height, warnings}. Raster images come in at 100% of their physical size (the file's ppi, else 72); SVG, DXF, PDF/.ai, EMF/WMF (clipped to the picture's frame), EPS (clipped to its bounding box; as document.open reads it) and native documents as one group, with the images, symbols, patterns and swatches they use. One undo step; selects what it placed (unless on a template layer); never touches the clipboard",
+            "{path | name+dataBase64, link?: true (a raster image keeps its file's path; a VectorCraft document at path becomes one locked placed document showing artboard `page`, linked to the file and read again when it changes (links.update; saving it in this app updates it at once), drawn as vectors in every output; false: an editable copy of its art, as from dataBase64; other files are embedded), text?: {characterSet?: \"unicode\" (UTF-8, or UTF-16 with a byte-order mark; other bytes as the platform's 8-bit set) | \"ansi\" (the platform's 8-bit set), platform?: \"windows\" (Windows-1252) | \"mac\" (Mac Roman), removeLineReturns?: false (each block of lines becomes one paragraph; blank lines end paragraphs), removeParagraphReturns?: false (drop blank lines), replaceSpaces?: n (runs of n ≥ 2 spaces become a tab)} (a .txt file, placed as area type filling rect, the replaced object's bounds, or else the artboard less a 36 pt margin), template?: false (onto a new locked template layer below the current layer), replace?: false (swap the one selected object, keeping its stacking place and transform; no at/rect), at?: [x, y] centre (default: the first artboard's centre), rect?: [x, y, width, height] fit inside, aspect kept (wins over at), page?: 1 (PDF/.ai page, or a native document's artboard), crop?: \"crop\" (clipped to that page or artboard, default) | \"bounding\" (the art's bounds) | \"art\" | \"trim\" | \"bleed\" | \"media\" (a PDF page's boxes), password? (an encrypted PDF), dxf?: {…the DXF options of document.open} (a .dxf drawing: fit fills the artboard under at, else the first; fitted or uncentred art lands with its drawing's artboard on that artboard, else it is centred on at)} → {ids, name, format, linked, width, height, warnings}. Raster images come in at 100% of their physical size (the file's ppi, else 72); SVG, DXF, PDF/.ai, EMF/WMF (clipped to the picture's frame), EPS (clipped to its bounding box; as document.open reads it) and native documents as one group, with the images, symbols, patterns and swatches they use. One undo step; selects what it placed (unless on a template layer); never touches the clipboard",
             has_doc,
             place
         ),
@@ -94,6 +98,9 @@ enum Art {
     Image(RasterImage),
     /// A text file's text, placed as area type filling the natural box.
     Text(String),
+    /// A VectorCraft document placed linked: the file read, the link, and whether the art's
+    /// bounds (not the artboard) are shown.
+    Document(document::Source, LinkInfo, bool),
     Vector {
         /// The loaded document: the source of the art's resources.
         src: Box<Document>,
@@ -157,6 +164,19 @@ fn load(p: &Value, cmd: &str, board: Option<Rect>) -> Result<Loaded> {
         ));
     }
     let crop = opts.crop != CropTo::Bounding;
+    // A VectorCraft document: placed linked from its file, else as an editable copy.
+    if matches!(format.id, "vectorcraft" | "template") {
+        let page = page as u32;
+        if let Some(path) = src.path.filter(|_| bool_or(p, "link", true)) {
+            let s = document::source(src.name, &src.bytes, Some(path), page, !crop, cmd)?;
+            let link = LinkInfo { page: Some(page), ..super::links::link_info(path, &src.bytes) };
+            let (natural, warnings) = (s.frame, s.warnings.clone());
+            return Ok(Loaded { name, format, art: Art::Document(s, link.clone(), !crop), natural, warnings, link: Some(link), board: None });
+        }
+        let a = document::document_art(src.name, &src.bytes, src.path, page, !crop, cmd)?;
+        let art = Art::Vector { src: Box::new(a.doc), nodes: a.nodes, clip: a.clip };
+        return Ok(Loaded { name, format, art, natural: a.frame, warnings: a.warnings, link: None, board: None });
+    }
     if format.raster {
         let img = fileio::raster_image(&src.bytes)?;
         let (sx, sy) = pt_per_px(img.ppi);
@@ -176,7 +196,7 @@ fn load(p: &Value, cmd: &str, board: Option<Rect>) -> Result<Loaded> {
             // Of the open options, only a DXF drawing's apply (the colour mode stays the file's).
             let o = fileio::LoadOptions { dxf: opts.dxf, ..Default::default() };
             let mut l = fileio::load_with(src.name, &src.bytes, &o)?;
-            // Linked images (a native document's) show their files, found from its folder.
+            // Linked images show their files, found from its folder.
             super::links::resolve(&mut l.doc, src.path, false);
             (l.doc, l.warnings)
         }
@@ -190,22 +210,31 @@ fn load(p: &Value, cmd: &str, board: Option<Rect>) -> Result<Loaded> {
         // The page placed is a PDF import's only one.
         let index = if pdf { 0 } else { page - 1 };
         let n = doc.artboards.len();
-        let board = doc.artboards.get(index).map(|a| a.rect).ok_or_else(|| {
-            let what = if matches!(format.id, "vectorcraft" | "template") { "artboard" } else { "page" };
-            bad(cmd, format!("page {page}: `{name}` has {n} {what}(s)"))
-        })?;
-        // A PDF import has one layer per page; a native document's (or an EPS file's) art is
-        // whatever lies on the artboard.
-        let pages: Vec<&Arc<Node>> = if pdf { layers.get(index).into_iter().collect() } else { layers.iter().collect() };
-        let on_board = |c: &&Arc<Node>| c.visual_bounds().is_some_and(|b| b.intersect(board).area() > 0.0 || board.contains(b.origin()));
-        let nodes = art_of(pages.into_iter().filter(|l| placeable(l)).flat_map(|l| l.children().into_iter().flatten()).filter(on_board));
-        (nodes, crop.then_some(board))
+        let board = doc.artboards.get(index).map(|a| a.rect).ok_or_else(|| bad(cmd, format!("page {page}: `{name}` has {n} page(s)")))?;
+        // A PDF import has one layer per page; an EPS file's art is whatever lies on the artboard.
+        let pages = if pdf { layers.get(index..=index).unwrap_or_default() } else { &layers[..] };
+        (on_artboard(pages, board), crop.then_some(board))
     };
     let natural = clip.or_else(|| nodes.iter().fold(None, |acc, n| vectorcraft_geom::union_opt(acc, n.visual_bounds())));
     let natural = natural.filter(|r| r.width() > 0.0 || r.height() > 0.0).ok_or_else(|| bad(cmd, format!("`{name}` has no art to place")))?;
     Ok(Loaded { name, format, art: Art::Vector { src: Box::new(doc), nodes, clip }, natural, warnings, link: None, board })
 }
 
+/// The placeable art of `layers` that lies on `board`.
+fn on_artboard(layers: &[Arc<Node>], board: Rect) -> Vec<Node> {
+    let on_board = |c: &&Arc<Node>| c.visual_bounds().is_some_and(|b| b.intersect(board).area() > 0.0 || board.contains(b.origin()));
+    art_of(layers.iter().filter(|l| placeable(l)).flat_map(|l| l.children().into_iter().flatten()).filter(on_board))
+}
+
+/// A clipping path of rectangle `r`, with id `id`.
+fn clip_path(id: NodeId, r: Rect) -> Node {
+    let mut c = Node::path(id, shapes::rectangle(r), Appearance::basic(Paint::None, Paint::None, 0.0));
+    if let NodeKind::Path { clipping, .. } = &mut c.kind {
+        *clipping = true;
+    }
+    c
+}
+
 /// A visible, non-template layer.
 fn placeable(l: &Node) -> bool {
     l.visible && !matches!(l.kind, NodeKind::Layer { template: true, .. })
@@ -243,15 +272,12 @@ fn build(d: &mut Document, l: Loaded, link: Option<LinkInfo>) -> Node {
             Node::new(d.alloc_id(), NodeKind::Image(im))
         }
         Art::Text(t) => Node::new(d.alloc_id(), NodeKind::Text(Box::new(text::area_text(t, l.natural)))),
+        Art::Document(s, link, bounding) => document::node(d, &s, link, bounding),
         Art::Vector { src, mut nodes, clip } => {
             adopt::adopt(d, &src, &mut nodes);
             let mut children: Vec<Arc<Node>> = nodes.iter().map(|n| Arc::new(d.reid(n))).collect();
             if let Some(r) = clip {
-                let mut c = Node::path(d.alloc_id(), shapes::rectangle(r), Appearance::basic(Paint::None, Paint::None, 0.0));
-                if let NodeKind::Path { clipping, .. } = &mut c.kind {
-                    *clipping = true;
-                }
-                children.insert(0, Arc::new(c));
+                children.insert(0, Arc::new(clip_path(d.alloc_id(), r)));
             }
             Node::new(d.alloc_id(), NodeKind::Group { children, clip: clip.is_some() })
         }

crates/engine/src/cmd/print.rs

@@ -118,6 +118,9 @@ fn print(s: &mut Session, p: &Value) -> Result<Value> {
         let preset = given.or(Some(set.advanced.flattener_preset.as_str()).filter(|n| !n.trim().is_empty())).unwrap_or("medium");
         set.advanced.flattener_preset = preset.to_string();
     }
+    // Placed documents print their files' art.
+    let (full, _) = super::place::document::full_documents(doc);
+    let doc = &*full;
     // Raster effects print as images at the document's raster effects resolution.
     let flat = super::rasterfx::flatten_raster_effects(doc);
     let doc = flat.as_ref().unwrap_or(doc);

crates/engine/src/cmd/select.rs

@@ -36,7 +36,15 @@ pub fn specs() -> Vec<CommandSpec> {
             has_doc,
             toggle
         ),
-        cmd!("select.key", "Set Key Object", [], None, "{id?} (none clears)", has_doc, key),
+        cmd!(
+            "select.key",
+            "Set Key Object",
+            [],
+            None,
+            "{id?: a selected object (the Selection tool: a click on one object of a selection of several; on the key again: none)} the key object Align aligns to and Distribute Spacing spaces from; none clears it",
+            has_doc,
+            key
+        ),
         cmd!("select.anchors", "Select Anchors", [], None, "{id, anchors: [[subpath, anchor]…], mode: \"set\"|\"add\"|\"toggle\"}", has_doc, anchors),
         cmd!(
             "select.anchorsMany",

crates/engine/src/cmd/shaper.rs

@@ -0,0 +1,771 @@
+//! Shaper compositions are groups of generated fills/strokes with transparent, editable source
+//! art retained underneath. Recipes select topology regions; source edits re-evaluate them in
+//! the same undo transaction. Rendering and exporters only see ordinary groups and paths.
+use super::*;
+use serde_json::{Value, json};
+use std::{collections::BTreeMap, sync::Arc};
+use vectorcraft_doc::shaper::{EdgeEdit, FILL_PREFIX, FaceEdit, FaceSelector, SOURCES, STROKE_PREFIX, ShaperSpec};
+use vectorcraft_doc::{Appearance, AppearanceItem, Document, Node, NodeId, NodeKind};
+use vectorcraft_geom::{FillRule, PathData, Point, Rect, Shape as _};
+use vectorcraft_pathops as po;
+use vectorcraft_tools::builder::{self as b, BuilderMap, Hit};
+
+const MAX_SOURCES: usize = 64;
+const MAX_POINTS: usize = 4096;
+const MAX_EDITS: usize = 8192;
+
+pub fn specs() -> Vec<CommandSpec> {
+    vec![
+        cmd!(
+            "shaper.scribble",
+            "Shaper",
+            [],
+            None,
+            "{points: [[x,y]…], ids?: [id…] (default: nearby art), tolerance?: pt (4)} interior scribbles remove fills; scribbles through several regions merge with the origin fill; ending outside removes fills and boundary strokes; outside scribbles erase stroke pieces. Originals remain editable → {id, regions, strokes}",
+            has_doc,
+            scribble
+        ),
+        cmd!(
+            "shaper.select",
+            "Select Shaper Face",
+            [],
+            None,
+            "{point: [x,y], source?: bool} click selects a group, then a face; source enters construction isolation and selects an original → {id}",
+            has_doc,
+            select
+        ),
+        cmd!(
+            "shaper.release",
+            "Release Shaper Group",
+            ["Object", "Shaper"],
+            None,
+            "{id? (default: selection)} restore the original paths → {ids}",
+            has_doc,
+            release
+        ),
+        cmd!(
+            "shaper.expand",
+            "Expand Shaper Group",
+            ["Object", "Shaper"],
+            None,
+            "{id? (default: selection)} keep the visible result as ordinary paths → {id}",
+            has_doc,
+            expand
+        ),
+    ]
+}
+
+fn source_group(n: &Node) -> Option<&Node> {
+    n.shaper.as_ref()?;
+    n.children()?.first().map(AsRef::as_ref).filter(|g| g.name.as_deref() == Some(SOURCES))
+}
+fn sources(n: &Node) -> Vec<Arc<Node>> {
+    source_group(n).and_then(Node::children).cloned().unwrap_or_default()
+}
+fn finite(p: Point) -> bool {
+    p.x.is_finite() && p.y.is_finite() && p.x.abs() <= 1e9 && p.y.abs() <= 1e9
+}
+
+fn map_of(src: &[Arc<Node>]) -> Result<BuilderMap> {
+    if src.is_empty() || src.len() > MAX_SOURCES {
+        return Err(bad("shaper.scribble", "Shaper needs 1–64 source paths"));
+    }
+    let mut count = 0usize;
+    let mut shapes = vec![];
+    for (i, n) in src.iter().enumerate() {
+        let (mut path, rule) = b::node_outline(n).ok_or_else(|| bad("shaper.scribble", "use paths or compound paths"))?;
+        count = count.saturating_add(path.subpaths.iter().map(|s| s.segment_count()).sum::<usize>());
+        if count > 4096 || path.subpaths.iter().flat_map(|s| &s.anchors).any(|a| !finite(a.p) || !finite(a.h_in) || !finite(a.h_out)) {
+            return Err(bad("shaper.scribble", "source paths are too large for Shaper"));
+        }
+        if !n.visible {
+            path = PathData::default();
+        } else if !n.appearance.fill_paint().is_none() {
+            for sub in path.subpaths.iter_mut().filter(|s| !s.closed) {
+                sub.closed = po::encloses_area(sub);
+            }
+        }
+        shapes.push(po::Shape::new(path, rule, i as u64));
+    }
+    let arrangement = po::shape_builder(&shapes, true);
+    let bounded = |pieces: Vec<po::Shape>| pieces.into_iter().filter_map(|p| p.path.bounds().map(|b| (p, b))).collect();
+    let regions = arrangement
+        .regions
+        .into_iter()
+        .filter_map(|r| {
+            let bounds = r.path.bounds()?;
+            let path = r.path.to_bezpath();
+            Some((r, path, bounds))
+        })
+        .collect();
+    let map = BuilderMap { shapes, regions, edges: bounded(arrangement.edges), lines: bounded(arrangement.lines) };
+    if map.regions.is_empty() && map.lines.is_empty() && map.edges.is_empty() {
+        return Err(bad("shaper.scribble", "these paths are too degenerate for Shaper"));
+    }
+    Ok(map)
+}
+
+fn relative(src: &[Arc<Node>], i: usize, p: Point) -> Point {
+    let b = src.get(i).and_then(|n| n.geometric_bounds()).unwrap_or(Rect::ZERO);
+    Point::new((p.x - b.x0) / b.width().max(1e-9), (p.y - b.y0) / b.height().max(1e-9))
+}
+fn absolute(src: &[Arc<Node>], i: usize, p: Point) -> Point {
+    let b = src.get(i).and_then(|n| n.geometric_bounds()).unwrap_or(Rect::ZERO);
+    Point::new(b.x0 + p.x * b.width(), b.y0 + p.y * b.height())
+}
+fn face_selector(map: &BuilderMap, src: &[Arc<Node>], i: usize) -> Option<FaceSelector> {
+    let (r, _, bounds) = map.regions.get(i)?;
+    let source = *r.sources.first()?;
+    let point = po::interior_point(&r.path).unwrap_or(bounds.center());
+    Some(FaceSelector { sources: r.sources.clone(), anchor: relative(src, source, point) })
+}
+fn selected_face(map: &BuilderMap, src: &[Arc<Node>], selector: &FaceSelector) -> Option<usize> {
+    let point = absolute(src, *selector.sources.first()?, selector.anchor);
+    map.regions
+        .iter()
+        .enumerate()
+        .filter(|(_, (r, _, _))| r.sources == selector.sources)
+        .min_by(|(_, a), (_, b)| {
+            let distance = |r: &b::Face| if r.1.winding(point) != 0 { 0.0 } else { r.2.center().distance(point) };
+            distance(a).total_cmp(&distance(b))
+        })
+        .map(|(i, _)| i)
+}
+fn piece_point(path: &PathData) -> Option<Point> {
+    use vectorcraft_geom::ParamCurve as _;
+    let sub = path.subpaths.first()?;
+    (sub.segment_count() > 0).then(|| sub.segment(sub.segment_count() / 2).eval(0.5))
+}
+fn pieces(map: &BuilderMap) -> Vec<&po::Shape> {
+    map.edges.iter().chain(&map.lines).map(|(p, _)| p).collect()
+}
+fn side_sources(map: &BuilderMap, p: &po::Shape) -> [Vec<usize>; 2] {
+    let mut sides = map.sides(p).map(|i| i.and_then(|i| map.regions.get(i)).map_or(vec![], |r| r.0.sources.clone()));
+    sides.sort();
+    sides
+}
+fn edge_selector(map: &BuilderMap, src: &[Arc<Node>], piece: &po::Shape) -> Option<EdgeEdit> {
+    let source = usize::try_from(piece.key).ok()?;
+    Some(EdgeEdit { source, sides: side_sources(map, piece), anchor: relative(src, source, piece_point(&piece.path)?), erase: true, paint: None })
+}
+fn selected_edge(map: &BuilderMap, src: &[Arc<Node>], edit: &EdgeEdit) -> Option<usize> {
+    let point = absolute(src, edit.source, edit.anchor);
+    pieces(map)
+        .iter()
+        .enumerate()
+        .filter(|(_, p)| p.key == edit.source as u64 && side_sources(map, p) == edit.sides)
+        .filter_map(|(i, p)| p.path.nearest(point).map(|(_, _, _, _, distance)| (i, distance)))
+        .min_by(|a, b| a.1.total_cmp(&b.1))
+        .map(|p| p.0)
+}
+fn face_edits<'a>(map: &BuilderMap, src: &[Arc<Node>], spec: &'a ShaperSpec) -> BTreeMap<usize, &'a FaceEdit> {
+    spec.faces.iter().filter_map(|e| selected_face(map, src, &e.selector).map(|i| (i, e))).collect()
+}
+fn fill_source(src: &[Arc<Node>], r: &po::Region) -> Option<usize> {
+    r.sources.iter().rev().copied().find(|i| src.get(*i).is_some_and(|s| s.visible && !s.appearance.fill_paint().is_none()))
+}
+/// Regions separated only by covered strokes are one visible face. A visible line
+/// through a circle still separates two faces, even though their fills have the same source.
+fn visible_components(map: &BuilderMap, src: &[Arc<Node>], edits: &BTreeMap<usize, &FaceEdit>) -> Vec<usize> {
+    fn root(parents: &[usize], mut i: usize) -> usize {
+        for _ in 0..parents.len() {
+            let Some(&next) = parents.get(i) else { return i };
+            if next == i {
+                return i;
+            }
+            i = next;
+        }
+        i
+    }
+    let owner = |i: usize| {
+        let edit = edits.get(&i);
+        if edit.is_some_and(|e| e.erase || e.paint.as_ref().is_some_and(|a| a.fill_paint().is_none())) {
+            return None;
+        }
+        edit.and_then(|e| e.paint_source).or_else(|| map.regions.get(i).and_then(|r| fill_source(src, &r.0)))
+    };
+    let mut parents: Vec<usize> = (0..map.regions.len()).collect();
+    for piece in pieces(map) {
+        let [Some(a), Some(b)] = map.sides(piece) else { continue };
+        let (Some(left), Some(right)) = (owner(a), owner(b)) else { continue };
+        let merge = |i| edits.get(&i).and_then(|e| e.merge);
+        let merged = merge(a).is_some() && merge(a) == merge(b);
+        let covered = left as u64 > piece.key && right as u64 > piece.key;
+        let unstroked = src.get(piece.key as usize).is_none_or(|n| !n.visible || n.appearance.stroke_paint().is_none());
+        if (left == right || merged) && (merged || covered || unstroked) {
+            let (a, b) = (root(&parents, a), root(&parents, b));
+            if let Some(parent) = parents.get_mut(a) {
+                *parent = b;
+            }
+        }
+    }
+    (0..parents.len()).map(|i| root(&parents, i)).collect()
+}
+
+fn fill_style(mut a: Appearance) -> Appearance {
+    a.items.retain(AppearanceItem::is_fill);
+    a
+}
+fn stroke_style(mut a: Appearance) -> Appearance {
+    a.items.retain(|i| !i.is_fill());
+    a
+}
+
+/// Join compatible strokes at two-way junctions. Branches stay separate; a line
+/// crossing a circle must not turn into the circle's outline at the intersection.
+fn join_strokes(nodes: Vec<Arc<Node>>) -> Vec<Arc<Node>> {
+    const TOL: f64 = 1e-5;
+    type End = (usize, bool);
+    let mut buckets: BTreeMap<(i64, i64), Vec<(End, Point)>> = BTreeMap::new();
+    let key = |p: Point| finite(p).then(|| ((p.x / TOL).floor() as i64, (p.y / TOL).floor() as i64));
+    for (i, n) in nodes.iter().enumerate() {
+        let Some(sp) = n.path_data().filter(|p| p.subpaths.len() == 1).and_then(|p| p.subpaths.first()).filter(|p| !p.closed) else { continue };
+        for (last, a) in [(false, sp.anchors.first()), (true, sp.anchors.last())] {
+            if let Some(a) = a
+                && let Some(key) = key(a.p)
+            {
+                buckets.entry(key).or_default().push(((i, last), a.p));
+            }
+        }
+    }
+    let mut connections: BTreeMap<End, End> = BTreeMap::new();
+    for entries in buckets.values() {
+        for &(end, p) in entries {
+            let Some((x, y)) = key(p) else { continue };
+            let mut near = vec![];
+            for dx in -1..=1 {
+                for dy in -1..=1 {
+                    if let Some(entries) = buckets.get(&(x + dx, y + dy)) {
+                        near.extend(entries.iter().filter(|(_, q)| p.distance(*q) <= TOL).map(|(end, _)| *end));
+                    }
+                }
+            }
+            if near.len() != 2 {
+                continue;
+            }
+            let Some(other) = near.into_iter().find(|e| *e != end) else { continue };
+            let Some((a, b)) = nodes.get(end.0).zip(nodes.get(other.0)) else { continue };
+            if a.appearance == b.appearance && a.opacity == b.opacity && a.blend == b.blend {
+                connections.insert(end, other);
+            }
+        }
+    }
+    let mut seen = std::collections::BTreeSet::new();
+    let mut out = vec![];
+    // Open chains first, then closed loops. This avoids beginning in a chain's middle.
+    let starts = nodes
+        .iter()
+        .enumerate()
+        .flat_map(|(i, _)| [(i, false), (i, true)])
+        .filter(|e| !connections.contains_key(e))
+        .chain(nodes.iter().enumerate().map(|(i, _)| (i, false)));
+    for start in starts {
+        if seen.contains(&start.0) {
+            continue;
+        }
+        if let Some(node) = nodes.get(start.0).filter(|n| n.path_data().is_none_or(|p| p.subpaths.len() != 1)) {
+            seen.insert(start.0);
+            out.push(node.clone());
+            continue;
+        }
+        let mut end = start;
+        let mut prototype = start.0;
+        let mut path = vectorcraft_geom::SubPath::default();
+        loop {
+            if !seen.insert(end.0) {
+                break;
+            }
+            prototype = prototype.min(end.0);
+            let Some(mut next) = nodes.get(end.0).and_then(|n| n.path_data()).and_then(|p| p.subpaths.first()).cloned() else { break };
+            if end.1 {
+                next.reverse();
+            }
+            if path.anchors.is_empty() {
+                path = next;
+            } else {
+                if let Some((a, b)) = path.anchors.last_mut().zip(next.anchors.first()) {
+                    *a = vectorcraft_geom::Anchor::with_handles(a.p, a.h_in, b.h_out);
+                }
+                path.anchors.extend(next.anchors.into_iter().skip(1));
+            }
+            let Some(&next) = connections.get(&(end.0, !end.1)) else { break };
+            if next == start {
+                if let Some(last) = path.anchors.pop()
+                    && let Some(first) = path.anchors.first_mut()
+                {
+                    *first = vectorcraft_geom::Anchor::with_handles(first.p, last.h_in, first.h_out);
+                }
+                path.closed = true;
+                break;
+            }
+            end = next;
+        }
+        if let Some(mut node) = nodes.get(prototype).cloned() {
+            if let Some(p) = Arc::make_mut(&mut node).path_data_mut() {
+                *p = PathData::new(vec![path]);
+            }
+            out.push(node);
+        }
+    }
+    out
+}
+
+fn generated(d: &mut Document, src: &[Arc<Node>], spec: &ShaperSpec, map: &BuilderMap) -> Result<Vec<Arc<Node>>> {
+    if spec.faces.len() + spec.edges.len() > MAX_EDITS {
+        return Err(bad("shaper.scribble", "too many Shaper edits"));
+    }
+    let edits = face_edits(map, src, spec);
+    let mut fills: BTreeMap<(Option<u64>, usize), Vec<usize>> = BTreeMap::new();
+    for (i, (r, _, _)) in map.regions.iter().enumerate() {
+        let edit = edits.get(&i);
+        if edit.is_some_and(|e| e.erase) {
+            continue;
+        }
+        if edit.and_then(|e| e.paint_source).or_else(|| fill_source(src, r)).is_none() {
+            continue;
+        }
+        let merge = edit.and_then(|e| e.merge);
+        fills.entry((merge, if merge.is_some() { 0 } else { i })).or_default().push(i);
+    }
+    let mut out = vec![];
+    for indices in fills.values() {
+        let Some(&i) = indices.first() else { continue };
+        let Some((region, _, _)) = map.regions.get(i) else { continue };
+        let edit = edits.get(&i);
+        let Some(source) = edit.and_then(|e| e.paint_source).or_else(|| fill_source(src, region)).and_then(|i| src.get(i)) else { continue };
+        let path = po::unite_all(&indices.iter().filter_map(|i| map.regions.get(*i).map(|r| (&r.0.path, FillRule::NonZero))).collect::<Vec<_>>());
+        let style = edit.and_then(|e| e.paint.clone()).unwrap_or_else(|| source.appearance.clone());
+        let mut n = Node::path(d.alloc_id(), path, fill_style(style));
+        n.opacity = source.opacity;
+        n.blend = source.blend;
+        n.name = Some(format!("{FILL_PREFIX}{i}"));
+        out.push(Arc::new(n));
+    }
+    let edge_edits: BTreeMap<usize, &EdgeEdit> = spec.edges.iter().filter_map(|e| selected_edge(map, src, e).map(|i| (i, e))).collect();
+    let mut strokes = vec![];
+    for (i, piece) in pieces(map).into_iter().enumerate() {
+        let sides = map.sides(piece);
+        let merge = |r: Option<usize>| r.and_then(|r| edits.get(&r)).and_then(|e| e.merge);
+        let merged_inside = merge(sides[0]).is_some() && merge(sides[0]) == merge(sides[1]);
+        // An exiting scribble removes the exposed stroke around the deleted area.
+        // Its shared boundary with surviving art still closes that art's contour.
+        let erased_boundary =
+            sides.iter().any(Option::is_some) && sides.iter().all(|r| r.is_none_or(|r| edits.get(&r).is_some_and(|e| e.erase && e.erase_edges)));
+        let occluded = sides
+            .iter()
+            .all(|r| r.and_then(|r| map.regions.get(r)).and_then(|r| fill_source(src, &r.0)).is_some_and(|source| source as u64 > piece.key));
+        if merged_inside || erased_boundary || occluded || edge_edits.get(&i).is_some_and(|e| e.erase) {
+            continue;
+        }
+        let Some(source) = src.get(piece.key as usize) else { continue };
+        let style = edge_edits.get(&i).and_then(|e| e.paint.clone()).unwrap_or_else(|| source.appearance.clone());
+        if style.stroke_paint().is_none() {
+            continue;
+        }
+        let mut n = Node::path(d.alloc_id(), piece.path.clone(), stroke_style(style));
+        n.opacity = source.opacity;
+        n.blend = source.blend;
+        n.name = Some(format!("{STROKE_PREFIX}{i}"));
+        strokes.push(Arc::new(n));
+    }
+    out.extend(join_strokes(strokes));
+    Ok(out)
+}
+
+/// Re-evaluate only groups whose original art changed. Errors reach Session::edit's rollback.
+pub(crate) fn refresh(before: &Document, d: &mut Document) -> Result<()> {
+    let mut ids = vec![];
+    d.walk(|n| {
+        if n.shaper.is_some() {
+            ids.push(n.id)
+        }
+    });
+    for id in ids {
+        let Some(current) = d.node(id).cloned() else { continue };
+        let Some(old) = before.node(id) else { continue };
+        let src = sources(&current);
+        let source_changed = sources(old) != src;
+        let output_changed = current.children().is_some_and(|children| {
+            children
+                .iter()
+                .skip(1)
+                .any(|n| old.children().and_then(|c| c.iter().find(|o| o.id == n.id)).is_some_and(|o| o.appearance != n.appearance))
+        });
+        if !source_changed && !output_changed {
+            continue;
+        }
+        if src.is_empty() {
+            d.remove(id)?;
+            continue;
+        }
+        let map = map_of(&src)?;
+        let mut spec = current.shaper.as_deref().cloned().unwrap_or_default();
+        let previous = sources(old);
+        if previous.iter().map(|s| s.id).ne(src.iter().map(|s| s.id)) {
+            // Source insertion, deletion or reordering updates the index-based recipes.
+            let index = |i: usize| previous.get(i).and_then(|old| src.iter().position(|n| n.id == old.id));
+            spec.faces.retain_mut(|e| {
+                let Some(indices) = e.selector.sources.iter().map(|i| index(*i)).collect::<Option<Vec<_>>>() else { return false };
+                let paint_source = match e.paint_source {
+                    Some(i) => {
+                        let Some(i) = index(i) else { return false };
+                        Some(i)
+                    }
+                    None => None,
+                };
+                e.selector.sources = indices;
+                e.selector.sources.sort();
+                e.paint_source = paint_source;
+                true
+            });
+            spec.edges.retain_mut(|e| {
+                let Some(source) = index(e.source) else { return false };
+                for side in &mut e.sides {
+                    let Some(indices) = side.iter().map(|i| index(*i)).collect::<Option<Vec<_>>>() else { return false };
+                    *side = indices;
+                    side.sort();
+                }
+                e.sides.sort();
+                e.source = source;
+                true
+            });
+        }
+        if output_changed {
+            for n in current.children().into_iter().flatten().skip(1) {
+                let Some(o) = old.children().and_then(|c| c.iter().find(|o| o.id == n.id)) else { continue };
+                if o.appearance == n.appearance {
+                    continue;
+                }
+                if let Some(i) = n.name.as_deref().and_then(|s| s.strip_prefix(FILL_PREFIX)).and_then(|s| s.parse::<usize>().ok()) {
+                    let existing = face_edits(&map, &src, &spec);
+                    let merge = existing.get(&i).and_then(|e| e.merge);
+                    let components = visible_components(&map, &src, &existing);
+                    let related: Vec<usize> = if let Some(m) = merge {
+                        existing.iter().filter(|(_, e)| e.merge == Some(m)).map(|(i, _)| *i).collect()
+                    } else {
+                        components.iter().enumerate().filter(|(_, c)| Some(*c) == components.get(i)).map(|(i, _)| i).collect()
+                    };
+                    for i in related {
+                        let Some(selector) = face_selector(&map, &src, i) else { continue };
+                        if let Some(e) = spec.faces.iter_mut().rev().find(|e| e.selector == selector) {
+                            e.paint = Some(n.appearance.clone());
+                        } else {
+                            spec.faces.push(FaceEdit {
+                                selector,
+                                erase: false,
+                                erase_edges: false,
+                                paint_source: None,
+                                merge,
+                                paint: Some(n.appearance.clone()),
+                            });
+                        }
+                    }
+                } else if n.name.as_deref().is_some_and(|s| s.starts_with(STROKE_PREFIX)) {
+                    // One joined output may contain pieces from several original paths.
+                    for piece in pieces(&map) {
+                        let contained = piece
+                            .path
+                            .subpaths
+                            .iter()
+                            .flat_map(|s| &s.anchors)
+                            .all(|a| n.path_data().and_then(|p| p.nearest(a.p)).is_some_and(|p| p.4 < 1e-5))
+                            && piece_point(&piece.path).is_some_and(|point| n.path_data().and_then(|p| p.nearest(point)).is_some_and(|p| p.4 < 1e-5));
+                        if contained && let Some(mut e) = edge_selector(&map, &src, piece) {
+                            e.erase = false;
+                            e.paint = Some(n.appearance.clone());
+                            spec.edges.push(e);
+                        }
+                    }
+                }
+            }
+        }
+        let mut children = current.children().and_then(|c| c.first()).cloned().into_iter().collect::<Vec<_>>();
+        let old_ids: BTreeMap<&str, NodeId> =
+            current.children().into_iter().flatten().skip(1).filter_map(|n| n.name.as_deref().map(|name| (name, n.id))).collect();
+        for mut n in generated(d, &src, &spec, &map)? {
+            if let Some(id) = n.name.as_deref().and_then(|name| old_ids.get(name)) {
+                Arc::make_mut(&mut n).id = *id;
+            }
+            children.push(n);
+        }
+        let n = d.node_mut(id).ok_or(EngineError::NoNode(id))?;
+        n.shaper = Some(Box::new(spec));
+        if let Some(ch) = n.children_mut() {
+            *ch = children;
+        }
+    }
+    Ok(())
+}
+
+fn candidates(s: &Session, p: &Value, points: &[Point], tolerance: f64) -> Result<Vec<NodeId>> {
+    let st = s.doc()?;
+    let area = points.iter().fold(Rect::new(f64::MAX, f64::MAX, f64::MIN, f64::MIN), |b, p| b.union_pt(*p)).inflate(tolerance, tolerance);
+    let supplied = p.get("ids").and_then(Value::as_array).map(|v| v.iter().filter_map(Value::as_u64).map(NodeId).collect::<Vec<_>>());
+    let expand = supplied.is_none() && st.selection.objects.len() < 2;
+    let ids = supplied.unwrap_or_else(|| if st.selection.objects.len() > 1 { st.selection.objects.clone() } else { st.doc.selectable_art() });
+    let eligible: Vec<NodeId> = ids
+        .into_iter()
+        .filter(|id| {
+            st.doc.is_editable(*id)
+                && st.doc.node(*id).is_some_and(|n| {
+                    !matches!(n.kind, NodeKind::Path { guide: true, .. } | NodeKind::Path { clipping: true, .. })
+                        && (n.shaper.is_some() || b::node_outline(n).is_some())
+                })
+        })
+        .collect();
+    let bounds = |id| st.doc.node(id).and_then(Node::geometric_bounds).map(|b| b.inflate(tolerance, tolerance));
+    let overlaps = |a: Rect, b: Rect| a.intersect(b).area() > 0.0;
+    let mut ids: Vec<NodeId> = eligible.iter().copied().filter(|id| bounds(*id).is_some_and(|b| overlaps(b, area))).collect();
+    if expand {
+        // A protruding line must still be split at the shape it passes through, even when
+        // the scribble itself never enters that shape. Include the connected neighbourhood.
+        loop {
+            let next: Vec<NodeId> = eligible
+                .iter()
+                .copied()
+                .filter(|id| {
+                    !ids.contains(id)
+                        && bounds(*id).is_some_and(|bb| {
+                            ids.iter()
+                                .any(|other| st.doc.parent_of(*other) == st.doc.parent_of(*id) && bounds(*other).is_some_and(|b| overlaps(bb, b)))
+                        })
+                })
+                .collect();
+            if next.is_empty() {
+                break;
+            }
+            ids.extend(next);
+            if ids.len() > MAX_SOURCES {
+                return Err(bad("shaper.scribble", "too many overlapping paths for Shaper"));
+            }
+        }
+    }
+    let ids = b::sorted_roots(&st.doc, &ids);
+    let parent = ids.first().and_then(|id| st.doc.position(*id)).map(|p| p.0);
+    if ids.iter().any(|id| st.doc.position(*id).map(|p| p.0) != parent) {
+        return Err(bad("shaper.scribble", "overlapping Shaper paths must be in the same layer or group"));
+    }
+    Ok(ids)
+}
+
+fn scribble(s: &mut Session, p: &Value) -> Result<Value> {
+    const C: &str = "shaper.scribble";
+    let input = p
+        .get("points")
+        .and_then(Value::as_array)
+        .filter(|a| !a.is_empty() && a.len() <= MAX_POINTS)
+        .ok_or_else(|| bad(C, "points must contain 1–4096 coordinates"))?;
+    let pts = input
+        .iter()
+        .map(|v| point_param(&json!({"p": v}), "p").filter(|p| finite(*p)).ok_or_else(|| bad(C, "invalid point")))
+        .collect::<Result<Vec<_>>>()?;
+    let tolerance = f64_or(p, "tolerance", 4.0);
+    if !tolerance.is_finite() || !(0.01..=1000.0).contains(&tolerance) {
+        return Err(bad(C, "invalid tolerance"));
+    }
+    let step = (tolerance / 2.0).max(0.5);
+    let sample_count = pts.windows(2).map(|w| (w[0].distance(w[1]) / step).ceil()).sum::<f64>();
+    if sample_count > 65_536.0 {
+        return Err(bad(C, "scribble is too long"));
+    }
+    let points = b::sample_polyline(&pts, step);
+    let roots = candidates(s, p, &points, tolerance)?;
+    if roots.is_empty() {
+        return Ok(json!({"id": null, "regions": 0, "strokes": 0}));
+    }
+    let mut src = vec![];
+    let mut spec = ShaperSpec::default();
+    let mut next_merge = 1u64;
+    for id in &roots {
+        let n = s.doc()?.doc.node(*id).ok_or(EngineError::NoNode(*id))?;
+        if let Some(previous) = n.shaper.as_deref() {
+            let offset = src.len();
+            let merge_offset = next_merge;
+            for mut e in previous.faces.clone() {
+                for i in &mut e.selector.sources {
+                    *i = i.saturating_add(offset);
+                }
+                e.paint_source = e.paint_source.map(|i| i.saturating_add(offset));
+                e.merge = e.merge.map(|i| i.saturating_add(merge_offset));
+                next_merge = next_merge.max(e.merge.unwrap_or(0).saturating_add(1));
+                spec.faces.push(e);
+            }
+            for mut e in previous.edges.clone() {
+                e.source = e.source.saturating_add(offset);
+                for side in &mut e.sides {
+                    for i in side {
+                        *i = i.saturating_add(offset);
+                    }
+                }
+                spec.edges.push(e);
+            }
+            src.extend(sources(n));
+        } else {
+            src.push(Arc::new(n.clone()));
+        }
+    }
+    let map = map_of(&src)?;
+    let edits = face_edits(&map, &src, &spec);
+    let filled = |i: usize| edits.get(&i).is_none_or(|e| !e.erase) && map.regions.get(i).and_then(|r| fill_source(&src, &r.0)).is_some();
+    let components = visible_components(&map, &src, &edits);
+    let faces: std::collections::BTreeSet<usize> =
+        points.iter().filter_map(|p| map.region_at(*p)).filter(|i| filled(*i)).filter_map(|i| components.get(i).copied()).collect();
+    let touched: Vec<usize> = components.iter().enumerate().filter(|(_, c)| faces.contains(c)).map(|(i, _)| i).collect();
+    let first = points.first().copied().unwrap_or(Point::ZERO);
+    let last = points.last().copied().unwrap_or(first);
+    let origin = map.region_at(first).filter(|i| filled(*i));
+    let exits = map.region_at(last).is_none();
+    let merge = origin.is_some() && faces.len() > 1 && !exits;
+    let paint_source =
+        origin.and_then(|i| edits.get(&i).and_then(|e| e.paint_source).or_else(|| map.regions.get(i).and_then(|r| fill_source(&src, &r.0))));
+    let origin_paint = origin.and_then(|i| edits.get(&i).and_then(|e| e.paint.clone()));
+    for &i in &touched {
+        if let Some(selector) = face_selector(&map, &src, i) {
+            spec.faces.push(FaceEdit {
+                selector,
+                erase: !merge,
+                erase_edges: exits,
+                paint_source,
+                merge: merge.then_some(next_merge),
+                paint: origin_paint.clone(),
+            });
+        }
+    }
+    let mut strokes = 0;
+    if touched.is_empty() {
+        let mut piece_ids = vec![];
+        for point in &points {
+            let index = match map.hit(*point, Some(tolerance)) {
+                Some(Hit::Line(i)) => Some(map.edges.len() + i),
+                Some(Hit::Edge(i)) => Some(i),
+                _ => None,
+            };
+            if let Some(i) = index
+                && !piece_ids.contains(&i)
+            {
+                piece_ids.push(i);
+            }
+        }
+        for i in piece_ids {
+            if let Some(e) = pieces(&map).get(i).and_then(|p| edge_selector(&map, &src, p)) {
+                spec.edges.push(e);
+                strokes += 1;
+            }
+        }
+    }
+    if touched.is_empty() && strokes == 0 {
+        return Ok(json!({"id": null, "regions": 0, "strokes": 0}));
+    }
+    let id = s.edit("Shaper", |d, sel| {
+        let top = *roots.last().ok_or_else(|| bad(C, "no source art"))?;
+        let (parent, index, _) = d.position(top).ok_or(EngineError::NoNode(top))?;
+        let earlier = roots.iter().filter(|id| **id != top && d.position(**id).is_some_and(|p| p.1 < index)).count();
+        let source_id = d.alloc_id();
+        let mut source = Node::group(source_id, src.clone());
+        source.name = Some(SOURCES.into());
+        source.opacity = 0.0;
+        let mut children = vec![Arc::new(source)];
+        children.extend(generated(d, &src, &spec, &map)?);
+        let id = d.alloc_id();
+        let mut group = Node::group(id, children);
+        group.name = Some("Shaper Group".into());
+        group.shaper = Some(Box::new(spec));
+        for id in &roots {
+            d.remove(*id)?;
+        }
+        d.insert(parent, index.saturating_sub(earlier), group)?;
+        sel.set([id]);
+        Ok(id)
+    })?;
+    s.doc_mut()?.isolation = None;
+    Ok(json!({"id": id.0, "regions": touched.len(), "strokes": strokes}))
+}
+
+fn group_at(d: &Document, point: Point, construction: bool) -> Option<NodeId> {
+    let mut groups = vec![];
+    d.walk(|n| {
+        if n.shaper.is_some()
+            && d.is_editable(n.id)
+            && (if construction { source_group(n).and_then(Node::geometric_bounds) } else { n.geometric_bounds() })
+                .is_some_and(|b| b.inflate(6.0, 6.0).contains(point))
+        {
+            groups.push(n.id)
+        }
+    });
+    groups.last().copied()
+}
+fn select(s: &mut Session, p: &Value) -> Result<Value> {
+    let point = point_param(p, "point").filter(|p| finite(*p)).ok_or_else(|| bad("shaper.select", "missing point"))?;
+    let st = s.doc()?;
+    let source = bool_or(p, "source", false);
+    let Some(group) = group_at(&st.doc, point, source) else { return Ok(json!({"id": null})) };
+    let node = st.doc.node(group).ok_or(EngineError::NoNode(group))?;
+    let target = if source {
+        sources(node)
+            .iter()
+            .rev()
+            .find(|n| {
+                b::node_outline(n)
+                    .is_some_and(|(path, _)| path.to_bezpath().winding(point) != 0 || path.nearest(point).is_some_and(|(_, _, _, _, d)| d < 6.0))
+            })
+            .map(|n| n.id)
+            .unwrap_or(group)
+    } else if st.selection.contains(group) {
+        node.children()
+            .into_iter()
+            .flatten()
+            .skip(1)
+            .find(|n| {
+                n.name.as_deref().is_some_and(|n| n.starts_with(FILL_PREFIX)) && n.path_data().is_some_and(|p| p.to_bezpath().winding(point) != 0)
+            })
+            .map_or(group, |n| n.id)
+    } else {
+        group
+    };
+    let isolation = source.then(|| source_group(node).map(|n| n.id)).flatten();
+    s.select(|_, sel| sel.set([target]))?;
+    if let Some(id) = isolation {
+        s.doc_mut()?.isolation = Some(id);
+    }
+    Ok(json!({"id": target.0}))
+}
+fn target(s: &Session, p: &Value) -> Result<NodeId> {
+    let id = id_param(p, "id")
+        .or_else(|| s.active().and_then(|d| d.selection.objects.first().copied()))
+        .ok_or_else(|| bad("shaper.release", "select a Shaper group"))?;
+    s.doc()?.doc.node(id).filter(|n| n.shaper.is_some()).ok_or_else(|| bad("shaper.release", "select a Shaper group"))?;
+    Ok(id)
+}
+fn release(s: &mut Session, p: &Value) -> Result<Value> {
+    let id = target(s, p)?;
+    let ids = s.edit("Release Shaper Group", |d, sel| {
+        let original = d.node(id).map(sources).ok_or(EngineError::NoNode(id))?;
+        let (parent, index, _) = d.position(id).ok_or(EngineError::NoNode(id))?;
+        d.remove(id)?;
+        let mut ids = vec![];
+        for (i, n) in original.into_iter().enumerate() {
+            ids.push(d.insert(parent, index + i, (*n).clone())?);
+        }
+        sel.set(ids.iter().copied());
+        Ok(ids)
+    })?;
+    s.doc_mut()?.isolation = None;
+    Ok(json!({"ids": ids.iter().map(|i| i.0).collect::<Vec<_>>()}))
+}
+fn expand(s: &mut Session, p: &Value) -> Result<Value> {
+    let id = target(s, p)?;
+    s.edit("Expand Shaper Group", |d, sel| {
+        let n = d.node_mut(id).ok_or(EngineError::NoNode(id))?;
+        n.shaper = None;
+        n.name = None;
+        if let Some(children) = n.children_mut()
+            && children.first().is_some_and(|c| c.name.as_deref() == Some(SOURCES))
+        {
+            children.remove(0);
+        }
+        sel.set([id]);
+        Ok(())
+    })?;
+    s.doc_mut()?.isolation = None;
+    Ok(json!({"id": id.0}))
+}

crates/engine/src/cmd/tabs.rs

@@ -3,7 +3,7 @@
 use serde_json::{Value, json};
 use vectorcraft_doc::{NodeKind, TabAlign, TabStop};
 
-use super::typecmd::{refresh_bounds, text_targets};
+use super::typecmd::{TextRange, para_span, refresh_bounds, text_targets};
 use super::*;
 
 pub fn specs() -> Vec<CommandSpec> {
@@ -13,12 +13,25 @@ pub fn specs() -> Vec<CommandSpec> {
             "Set Tab Stops",
             ["Window", "Tabs"],
             None,
-            "{stops: [{position: pt, align?: left|center|right|decimal, leader?: \". \", alignOn?: \".\"}], ids?} replace the tab stops of the selected text",
+            "{stops: [{position: pt, align?: left|center|right|decimal, leader?: \". \", alignOn?: \".\"}], ids?, start?: byte, end?: byte} replace the tab stops of the selected text (with a range: of the paragraphs it touches)",
             has_selection,
             set
         ),
-        cmd!(query "text.tabs.get", "Tab Stops", [], None, "{ids?} → {stops} of the first selected text object", has_selection, get),
-        cmd!("text.tabs.clear", "Clear All Tabs", ["Window", "Tabs"], None, "{ids?}", has_selection, |s, p| apply(s, p, vec![], "Clear All Tabs")),
+        cmd!(
+            query "text.tabs.get",
+            "Tab Stops",
+            [],
+            None,
+            "{ids?, start?: byte} → {stops} of the first selected text object (its paragraph at `start`; default the first)",
+            has_selection,
+            get
+        ),
+        cmd!("text.tabs.clear", "Clear All Tabs", ["Window", "Tabs"], None, "{ids?, start?: byte, end?: byte}", has_selection, |s, p| apply(
+            s,
+            p,
+            vec![],
+            "Clear All Tabs"
+        )),
     ]
 }
 
@@ -54,11 +67,13 @@ fn set(s: &mut Session, p: &Value) -> Result<Value> {
 
 fn apply(s: &mut Session, p: &Value, stops: Vec<TabStop>, label: &str) -> Result<Value> {
     let ids = text_targets(s, p, "text.tabs.set")?;
+    let range = TextRange::parse(p, "text.tabs.set")?;
     let n = stops.len();
     s.edit(label, |d, _| {
         for id in &ids {
             if let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) {
-                t.para.tabs = stops.clone();
+                let span = para_span(range, t);
+                t.edit_paras(span, |pa| pa.tabs = stops.clone());
                 refresh_bounds(t);
             }
         }
@@ -69,9 +84,10 @@ fn apply(s: &mut Session, p: &Value, stops: Vec<TabStop>, label: &str) -> Result
 
 fn get(s: &mut Session, p: &Value) -> Result<Value> {
     let ids = text_targets(s, p, "text.tabs.get")?;
+    let range = TextRange::parse(p, "text.tabs.get")?;
     let st = s.doc()?;
     let tabs = ids.iter().find_map(|id| match st.doc.node(*id).map(|n| &n.kind) {
-        Some(NodeKind::Text(t)) => Some(t.para.tabs.clone()),
+        Some(NodeKind::Text(t)) => Some(t.para_at(para_span(range, t).map_or(0, |r| r.start)).tabs.clone()),
         _ => None,
     });
     Ok(json!({ "stops": serde_json::to_value(tabs.unwrap_or_default()).unwrap_or(Value::Null) }))

crates/engine/src/cmd/textedit.rs

@@ -45,7 +45,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Area / Path Type",
             [],
             None,
-            "{path: id, mode: \"area\"|\"onPath\", text?: \"\", vertical?: bool = false, at?: [x, y] (on-path start: nearest point), size?, font?, placeholder?: bool (placeholder text instead, as text.create), leadingModel?, charAlign? (as text.create)} turn a path into an area-type frame or a type-on-a-path baseline (the path's paint is dropped) → {id}",
+            "{path: id, mode: \"area\"|\"onPath\", text?: \"\", vertical?: bool = false, at?: [x, y] (on-path start: nearest point), size?, font?, fit?: none|autoHeight|shrinkText, fitMinPercent? (area: as text.areaOptions; default autoHeight when the autoSizeAreaType preference is on), placeholder?: bool (placeholder text instead, as text.create), leadingModel?, charAlign? (as text.create)} turn a path into an area-type frame or a type-on-a-path baseline (the path's paint is dropped) → {id}",
             has_doc,
             create_in_path
         ),
@@ -135,6 +135,13 @@ fn edit_range(s: &mut Session, p: &Value) -> Result<Value> {
     let insert = str_param(p, "insert").unwrap_or("").to_string();
     let caret = s.edit("Typing", |d, _| {
         let t = text_mut(d, id).ok_or(EngineError::NoNode(id))?;
+        // Paragraph styles follow the edit: a split paragraph's new one continues its style, a
+        // merge keeps the first paragraph's.
+        let inserted: String = match &styled {
+            Some(r) => r.iter().map(|r| r.text.as_str()).collect(),
+            None => insert.clone(),
+        };
+        t.splice_paras(a, b, &inserted);
         let caret = match &styled {
             Some(r) => edit::replace_range_styled(&mut t.runs, a, b, r),
             None => edit::replace_range(&mut t.runs, a, b, &insert),
@@ -463,6 +470,7 @@ fn create_in_path(s: &mut Session, p: &Value) -> Result<Value> {
         xf: Affine::IDENTITY,
         runs: vec![TextRun { text, style }],
         para: super::create::new_type_para(),
+        paras: Vec::new(),
         area: Default::default(),
         path_effect: Default::default(),
         path_align: Default::default(),
@@ -472,6 +480,9 @@ fn create_in_path(s: &mut Session, p: &Value) -> Result<Value> {
         cached_baselines: Vec::new(),
     };
     super::create::new_type_alignment(s, p, C, &mut t)?;
+    if !on_path {
+        t.area.fit = super::create::new_area_fit(s, p, C)?;
+    }
     if bool_or(p, "placeholder", false) {
         super::typemenu::fill_with_placeholder(&mut t);
     } else {
@@ -597,6 +608,7 @@ fn headline_tracking(t: &TextObject, target: f64) -> Option<f64> {
             xf: Affine::IDENTITY,
             runs: head.clone(),
             para: Default::default(),
+            paras: Vec::new(),
             area: Default::default(),
             path_effect: Default::default(),
             path_align: Default::default(),

crates/engine/src/cmd/textstyles.rs

@@ -66,7 +66,7 @@ macro_rules! style_cmds {
                 concat!($p, ".apply"),
                 concat!("Apply ", $what, " Style"),
                 &[],
-                "{name, clearOverrides?, ids?|id + start?/end? (a Type tool range)} → {count}",
+                "{name, clearOverrides?, ids?|id + start?/end? (a Type tool range: character styles style it, paragraph styles apply to the paragraphs it touches)} → {count}",
                 |s, p| apply(s, p, $kind),
                 true,
             ),
@@ -179,7 +179,7 @@ fn text_mut(d: &mut Document, id: NodeId) -> Option<&mut vectorcraft_doc::TextOb
     }
 }
 
-/// How many runs (char) or text objects (para) use `name`.
+/// How many runs (char) or paragraphs (para) use `name`.
 fn uses(d: &Document, kind: Kind, name: &str) -> usize {
     let target = (name != kind.normal()).then_some(name);
     let mut n = 0;
@@ -187,7 +187,7 @@ fn uses(d: &Document, kind: Kind, name: &str) -> usize {
         if let NodeKind::Text(t) = &node.kind {
             n += match kind {
                 Kind::Char => t.runs.iter().filter(|r| r.style.style_name.as_deref() == target).count(),
-                Kind::Para => usize::from(t.para.style_name.as_deref() == target),
+                Kind::Para => (0..t.paragraph_count()).filter(|&i| t.para_at(i).style_name.as_deref() == target).count(),
             };
         }
     });
@@ -210,9 +210,11 @@ fn update_users(d: &mut Document, kind: Kind, name: &str, old: &Map<String, Valu
                 }
             }
             Kind::Para => {
-                if t.para.style_name == target {
-                    t.para = restyle(&t.para, old, new);
-                    changed = true;
+                for pa in t.para_styles_mut() {
+                    if pa.style_name == target {
+                        *pa = restyle(pa, old, new);
+                        changed = true;
+                    }
                 }
             }
         }
@@ -231,12 +233,11 @@ fn selection_attrs(s: &Session, p: &Value, kind: Kind) -> Result<Option<Map<Stri
         None => text_targets(s, &json!({}), "").ok().and_then(|v| v.first().copied()),
     };
     let Some(NodeKind::Text(t)) = id.and_then(|i| d.node(i)).map(|n| &n.kind) else { return Ok(None) };
+    let at = p.get("start").and_then(Value::as_u64).map_or(0, |v| usize::try_from(v).unwrap_or(usize::MAX));
     Ok(Some(match kind {
-        Kind::Char => {
-            let at = p.get("start").and_then(Value::as_u64).unwrap_or(0) as usize;
-            to_attrs(&vectorcraft_text::edit::style_at(&t.runs, at))
-        }
-        Kind::Para => to_attrs(&t.para),
+        Kind::Char => to_attrs(&vectorcraft_text::edit::style_at(&t.runs, at)),
+        // The paragraph at `start`.
+        Kind::Para => to_attrs(t.para_at(t.paragraphs_in(at, at).start)),
     }))
 }
 
@@ -329,8 +330,9 @@ fn apply(s: &mut Session, p: &Value, kind: Kind) -> Result<Value> {
     let normal = kind.attrs(d, kind.normal()).unwrap_or_default();
     let clear = bool_or(p, "clearOverrides", false);
     let style_name = (name != kind.normal()).then(|| name.clone());
-    // A Type tool range (character styles only) or whole text objects.
-    let range = id_param(p, "id").filter(|_| kind == Kind::Char && (p.get("start").is_some() || p.get("end").is_some()));
+    // A Type tool range or whole text objects.
+    let text_range = super::typecmd::TextRange::parse(p, &c)?;
+    let range = id_param(p, "id").filter(|_| text_range.is_some());
     let ids = match range.or_else(|| id_param(p, "id")) {
         Some(id) => vec![id],
         None => text_targets(s, p, &c)?,
@@ -376,7 +378,17 @@ fn apply(s: &mut Session, p: &Value, kind: Kind) -> Result<Value> {
                         return Err(e);
                     }
                 }
-                Kind::Para => t.para = para_fn(&t.para)?,
+                Kind::Para => {
+                    let mut v = t.paragraph_styles();
+                    let span = match (range, text_range) {
+                        (Some(_), Some(r)) => r.paras(t),
+                        _ => 0..v.len(),
+                    };
+                    for st in v.iter_mut().take(span.end).skip(span.start) {
+                        *st = para_fn(st)?;
+                    }
+                    t.set_paragraph_styles(v);
+                }
             }
             refresh_bounds(t);
         }
@@ -447,7 +459,7 @@ fn rename(s: &mut Session, p: &Value, kind: Kind) -> Result<Value> {
             };
             match kind {
                 Kind::Char => t.runs.iter_mut().for_each(|r| fix(&mut r.style.style_name)),
-                Kind::Para => fix(&mut t.para.style_name),
+                Kind::Para => t.para_styles_mut().for_each(|pa| fix(&mut pa.style_name)),
             }
         }
         Ok(())
@@ -472,7 +484,7 @@ fn delete(s: &mut Session, p: &Value, kind: Kind) -> Result<Value> {
             };
             match kind {
                 Kind::Char => t.runs.iter_mut().for_each(|r| fix(&mut r.style.style_name)),
-                Kind::Para => fix(&mut t.para.style_name),
+                Kind::Para => t.para_styles_mut().for_each(|pa| fix(&mut pa.style_name)),
             }
         }
         Ok(())

crates/engine/src/cmd/threads.rs

@@ -75,14 +75,24 @@ pub(crate) fn reflow(before: &Document, doc: &mut Document) {
         });
         // The story: live frames' runs, plus the text of frames deleted by this edit.
         let mut story: Vec<TextRun> = vec![];
+        let mut sources: Vec<TextObject> = vec![];
+        let mut later_wins = vec![];
         let mut live = vec![];
         for id in &thread {
             match (text_of(doc, *id), text_of(before, *id)) {
-                (Some(t), _) => {
+                (Some(t), old) => {
                     story.extend(t.runs.iter().cloned());
+                    // A frame whose first paragraph was just restyled gives the paragraph it
+                    // shares with the frame before it that style.
+                    later_wins.push(old.is_some_and(|o| o.para_at(0) != t.para_at(0)));
+                    sources.push(t.clone());
                     live.push(*id);
                 }
-                (None, Some(old)) => story.extend(old.runs.iter().cloned()),
+                (None, Some(old)) => {
+                    story.extend(old.runs.iter().cloned());
+                    later_wins.push(false);
+                    sources.push(old.clone());
+                }
                 (None, None) => {}
             }
         }
@@ -92,16 +102,33 @@ pub(crate) fn reflow(before: &Document, doc: &mut Document) {
             }
             continue;
         }
+        let source_refs: Vec<&TextObject> = sources.iter().collect();
+        let paras = vectorcraft_text::thread::story_paras(&source_refs, &later_wins);
         vectorcraft_text::edit::normalize(&mut story);
+        if live.len() >= 2 {
+            // Threaded frames keep their size: Auto Size is off for them (as in Illustrator).
+            for id in &live {
+                if text_of(doc, *id).is_some_and(|t| t.area.fit == vectorcraft_doc::AreaFit::AutoHeight)
+                    && let Some(NodeKind::Text(t)) = doc.node_mut(*id).map(|n| &mut n.kind)
+                {
+                    t.area.fit = vectorcraft_doc::AreaFit::None;
+                }
+            }
+        }
         let frames: Vec<TextObject> = live.iter().filter_map(|id| text_of(doc, *id).cloned()).collect();
         let refs: Vec<&TextObject> = frames.iter().collect();
-        let parts = vectorcraft_text::thread::distribute(vectorcraft_text::FontDb::global(), &refs, &story);
-        for (id, runs) in live.iter().zip(parts) {
-            if let Some(NodeKind::Text(t)) = doc.node_mut(*id).map(|n| &mut n.kind)
-                && t.runs != runs
-            {
-                t.runs = runs;
-                refresh_bounds(t);
+        let parts = vectorcraft_text::thread::distribute(vectorcraft_text::FontDb::global(), &refs, &story, &paras);
+        for (id, part) in live.iter().zip(parts) {
+            if let Some(NodeKind::Text(t)) = doc.node_mut(*id).map(|n| &mut n.kind) {
+                let mut next = (**t).clone();
+                next.runs = part.runs;
+                next.set_paragraph_styles(part.paras);
+                if next.runs != t.runs || next.para != t.para || next.paras != t.paras {
+                    t.runs = next.runs;
+                    t.para = next.para;
+                    t.paras = next.paras;
+                    refresh_bounds(t);
+                }
             }
         }
         if live.len() >= 2 {
@@ -183,15 +210,17 @@ fn release(s: &mut Session, _: &Value) -> Result<Value> {
                 continue;
             }
             let mut story: Vec<TextRun> = vec![];
-            for id in &thread {
-                if let Some(t) = text_of(d, *id) {
-                    story.extend(t.runs.iter().cloned());
-                }
+            let sources: Vec<TextObject> = thread.iter().filter_map(|id| text_of(d, *id).cloned()).collect();
+            for t in &sources {
+                story.extend(t.runs.iter().cloned());
             }
+            let paras = vectorcraft_text::thread::story_paras(&sources.iter().collect::<Vec<_>>(), &[]);
             let style = story.first().map(|r| r.style.clone()).unwrap_or_default();
+            let first_para = paras.first().cloned().unwrap_or_default();
             for id in &out {
                 if let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) {
                     t.runs = vec![TextRun { text: String::new(), style: style.clone() }];
+                    t.set_all_paras(first_para.clone());
                     refresh_bounds(t);
                 }
             }
@@ -200,6 +229,7 @@ fn release(s: &mut Session, _: &Value) -> Result<Value> {
             {
                 vectorcraft_text::edit::normalize(&mut story);
                 t.runs = story;
+                t.set_paragraph_styles(paras);
             }
             let i = d.text_threads.iter().position(|t| *t == thread).unwrap_or(0);
             d.text_threads[i] = keep;

crates/engine/src/cmd/typecmd.rs

@@ -4,7 +4,7 @@
 use std::sync::Arc;
 
 use serde_json::{Value, json};
-use vectorcraft_doc::{Document, Justify, Node, NodeId, NodeKind, TextObject};
+use vectorcraft_doc::{AreaFit, Document, Justify, Node, NodeId, NodeKind, TextObject};
 use vectorcraft_geom::{Affine, PathData, Vec2};
 
 use super::edit::selected_roots;
@@ -48,7 +48,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Area Type Options…",
             ["Type"],
             None,
-            "{ids?, width?: pt, height?: pt, rows?, columns?, gutter?: pt, inset?: pt, firstBaseline?: ascent|capHeight|xHeight|leading|fixed, firstBaselineMin?: pt} set the selected area type's options; width and height size the type area from its top-left corner, along the type's own axes, and the text reflows at its size (none given: query) → the first object's options",
+            "{ids?, width?: pt, height?: pt, rows?, columns?, gutter?: pt, inset?: pt, firstBaseline?: ascent|capHeight|xHeight|leading|fixed, firstBaselineMin?: pt, verticalAlign?: top|center|bottom|justify, fit?: none|autoHeight|shrinkText, fitMinPercent?: 10..100} set the selected area type's options; width and height size the type area from its top-left corner, along the type's own axes, and the text reflows at its size (with fit autoHeight, Auto Size, the frame's height follows the text after every edit and height is ignored; setting the height by hand turns it off); fit shrinkText scales overflowing text down (size, leading, baseline shift) by the largest factor down to fitMinPercent % (default 50) that makes it fit (none given: query) → the first object's options, plus overflow (the text doesn't fit its frame) and fitScale (Shrink Text's factor, 1 unshrunk)",
             has_selection,
             area_options
         ),
@@ -75,7 +75,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Character",
             [],
             None,
-            "{ids?|id?, font?, style?, size?: pt, leading?: pt|\"auto\", tracking?: 1/1000 em, justify?: \"auto\" (the start of each paragraph's direction)|\"left\"|\"center\"|\"right\"|\"justifyAll\", fill?: colour, features?: [\"dlig\", \"-liga\", …] OpenType}",
+            "{ids?|id?, font?, style?, size?: pt, leading?: pt|\"auto\", tracking?: 1/1000 em, justify?: \"auto\" (the start of each paragraph's direction)|\"left\"|\"center\"|\"right\"|\"justifyAll\", fill?: colour, features?: [\"dlig\", \"-liga\", …] OpenType, start?: byte, end?: byte} (with a range: the character attributes style that range and justify the paragraphs it touches; without: all the text)",
             has_doc,
             set_style
         ),
@@ -97,13 +97,96 @@ fn orientation(s: &mut Session, p: &Value, vertical: bool) -> Result<Value> {
     Ok(json!({"vertical": vertical, "ids": ids.iter().map(|id| id.0).collect::<Vec<_>>()}))
 }
 
-/// Recompute the layout caches (bounds and baselines) after a text edit.
+/// Recompute the layout caches (bounds and baselines) after a text edit. Every engine text edit ends here (typing
+/// through `text.editRange` too), inside its `Session::edit`, so this is where Auto Size area type
+/// ([`vectorcraft_doc::AreaFit::AutoHeight`]) fits its frame to the text: part of the same undo
+/// step as the edit.
 pub(crate) fn refresh_bounds(t: &mut TextObject) {
+    // Edits that changed the paragraph count keep one paragraph style per paragraph.
+    t.normalize_paras();
+    auto_height(t);
     let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), t);
     t.cached_bounds = Some(lay.bounds);
     t.cached_baselines = lay.baselines();
 }
 
+/// The text-space bounds of area type's frame, when Auto Size can fit it: a rectangle (one
+/// subpath, as large as its bounds) of horizontal type in one row, with some height.
+fn auto_height_frame(t: &TextObject) -> Option<vectorcraft_geom::Rect> {
+    use vectorcraft_geom::Shape;
+    let vectorcraft_doc::TextKind::Area { frame } = &t.kind else { return None };
+    if t.area.fit != vectorcraft_doc::AreaFit::AutoHeight || t.vertical || t.area.rows > 1 || frame.subpaths.len() != 1 {
+        return None;
+    }
+    let b = frame.bounds()?;
+    let area = frame.to_bezpath().area().abs();
+    let finite = [b.x0, b.y0, b.x1, b.y1].iter().all(|v| v.is_finite());
+    (finite && b.height() > 1e-6 && b.width() > 1e-6 && (area - b.area()).abs() <= b.area() * 1e-6).then_some(b)
+}
+
+/// Auto Size: move the bottom of a rectangular area type frame to just below its last line (plus
+/// the inset), so the frame's height follows the text. Text in several columns gets the least
+/// height (to 0.01 pt) at which it fits. True when the frame changed.
+fn auto_height(t: &mut TextObject) -> bool {
+    use vectorcraft_geom::Shape;
+    let Some(b) = auto_height_frame(t) else { return false };
+    let db = vectorcraft_text::FontDb::global();
+    // Lay out in a frame as tall as the canvas allows: everything the width lets through flows.
+    let tall = (crate::MAX_COORD - b.y0).min(1.0e5);
+    if tall <= 1.0 {
+        return false;
+    }
+    let mut probe = t.clone();
+    let with_size = |probe: &mut TextObject, w: f64, h: f64| {
+        if let vectorcraft_doc::TextKind::Area { frame } = &mut probe.kind {
+            *frame = PathData::from_bezpath(&vectorcraft_geom::Rect::new(b.x0, b.y0, b.x0 + w, b.y0 + h).to_path(0.1));
+        }
+    };
+    // Columns: all the text in one column as wide as each of them is surely tall enough.
+    let cols = t.area.columns.max(1);
+    let col_w = if cols > 1 { ((b.width() - t.area.gutter.max(0.0) * (cols - 1) as f64) / cols as f64).max(1.0) } else { b.width() };
+    with_size(&mut probe, col_w, tall);
+    probe.area.columns = 1;
+    let lay = vectorcraft_text::layout(db, &probe);
+    let inset = t.area.inset.max(0.0);
+    let Some(bottom) = lay.lines.iter().map(|l| l.baseline + l.descent).filter(|y| y.is_finite()).reduce(f64::max) else { return false };
+    // The layout's fit test is `baseline + descent <= bottom + 0.01`: the last line fits exactly.
+    let mut h = (bottom + inset - b.y0).clamp(1.0, tall);
+    if cols > 1 {
+        // The least height (to 0.01 pt) at which the columns hold the text.
+        probe.area.columns = cols;
+        let fits = |probe: &mut TextObject, h: f64| {
+            with_size(probe, b.width(), h);
+            !vectorcraft_text::layout(db, probe).overflow
+        };
+        if !fits(&mut probe, h) {
+            return false;
+        }
+        let (mut lo, mut hi) = (1.0, h);
+        for _ in 0..24 {
+            if hi - lo <= 0.01 {
+                break;
+            }
+            let mid = (lo + hi) * 0.5;
+            if fits(&mut probe, mid) { hi = mid } else { lo = mid }
+        }
+        h = hi;
+    }
+    if (h - b.height()).abs() <= 1e-6 {
+        return false;
+    }
+    // Scale the frame about its top edge, keeping its anchors (and their order) as they are.
+    let a = Affine::translate((0.0, b.y0)) * Affine::scale_non_uniform(1.0, h / b.height()) * Affine::translate((0.0, -b.y0));
+    let vectorcraft_doc::TextKind::Area { frame } = &mut t.kind else { return false };
+    let mut next = frame.clone();
+    next.transform(a);
+    if next.bounds().is_none_or(|nb| ![nb.x0, nb.y0, nb.x1, nb.y1].iter().all(|v| v.is_finite() && v.abs() <= crate::MAX_COORD)) {
+        return false;
+    }
+    *frame = next;
+    true
+}
+
 /// Text objects among `ids` and their descendants.
 fn text_ids(d: &Document, ids: &[NodeId]) -> Vec<NodeId> {
     let mut out = vec![];
@@ -174,6 +257,60 @@ pub(crate) fn text_targets(s: &Session, p: &Value, cmd: &str) -> Result<Vec<Node
     Ok(t)
 }
 
+/// Optional `start`/`end` byte offsets of a text command: the character range it styles and the
+/// paragraphs it touches. Without either, the command applies to all the text.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub(crate) struct TextRange {
+    start: Option<usize>,
+    end: Option<usize>,
+}
+
+impl TextRange {
+    /// `start`/`end` of `p`, if either is given (non-negative integers).
+    pub(crate) fn parse(p: &Value, cmd: &str) -> Result<Option<Self>> {
+        let get = |k: &str| -> Result<Option<usize>> {
+            match p.get(k) {
+                None | Some(Value::Null) => Ok(None),
+                Some(v) => {
+                    v.as_u64().map(|n| Some(usize::try_from(n).unwrap_or(usize::MAX))).ok_or_else(|| bad(cmd, format!("`{k}` must be a byte offset")))
+                }
+            }
+        };
+        let (start, end) = (get("start")?, get("end")?);
+        Ok((start.is_some() || end.is_some()).then_some(Self { start, end }))
+    }
+    /// The byte range in `t`, clamped and ordered.
+    pub(crate) fn bytes(&self, t: &TextObject) -> (usize, usize) {
+        let len = vectorcraft_text::edit::runs_len(&t.runs);
+        let a = self.start.unwrap_or(0).min(len);
+        let b = self.end.unwrap_or(len).min(len);
+        (a.min(b), a.max(b))
+    }
+    /// The paragraphs of `t` the range touches.
+    pub(crate) fn paras(&self, t: &TextObject) -> std::ops::Range<usize> {
+        let (a, b) = self.bytes(t);
+        t.paragraphs_in(a, b)
+    }
+}
+
+/// Paragraphs of `t` an optional range touches (None: every paragraph).
+pub(crate) fn para_span(range: Option<TextRange>, t: &TextObject) -> Option<std::ops::Range<usize>> {
+    range.map(|r| r.paras(t))
+}
+
+/// Apply `f` to the character styles of `range` of `t` (None: every run).
+pub(crate) fn style_chars(t: &mut TextObject, range: Option<TextRange>, mut f: impl FnMut(&mut vectorcraft_doc::CharStyle)) {
+    match range {
+        None => t.runs.iter_mut().for_each(|r| f(&mut r.style)),
+        Some(r) => {
+            let (a, b) = r.bytes(t);
+            if a < b {
+                vectorcraft_text::edit::style_range(&mut t.runs, a, b, f);
+            }
+        }
+    }
+}
+
 fn set_text(s: &mut Session, p: &Value) -> Result<Value> {
     let text = str_param(p, "text").ok_or_else(|| bad("text.setText", "missing `text`"))?.to_string();
     let ids = text_targets(s, p, "text.setText")?;
@@ -181,6 +318,8 @@ fn set_text(s: &mut Session, p: &Value) -> Result<Value> {
         for id in &ids {
             let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) else { continue };
             let style = t.first_style();
+            // Every paragraph of the new text takes the first paragraph's attributes.
+            t.splice_paras(0, vectorcraft_text::edit::runs_len(&t.runs), &text);
             t.runs = vec![vectorcraft_doc::TextRun { text: text.clone(), style }];
             refresh_bounds(t);
         }
@@ -238,14 +377,14 @@ fn set_style(s: &mut Session, p: &Value) -> Result<Value> {
     {
         return Err(bad(C, "nothing to change"));
     }
+    let range = TextRange::parse(p, C)?;
     let ids = text_targets(s, p, C)?;
     let protect = s.prefs.missing_glyph_protection && (font.is_some() || style.is_some());
     s.edit("Character", |d, _| {
         for id in &ids {
             let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) else { continue };
             let before = protect.then(|| t.runs.clone());
-            for r in &mut t.runs {
-                let st = &mut r.style;
+            style_chars(t, range, |st| {
                 if let Some(f) = &font {
                     st.font_family = f.clone();
                 }
@@ -267,12 +406,13 @@ fn set_style(s: &mut Session, p: &Value) -> Result<Value> {
                 if let Some(f) = &features {
                     st.features = f.clone();
                 }
-            }
+            });
             if let Some(before) = before {
                 super::textedit::protect_missing_glyphs(&before, &mut t.runs);
             }
             if let Some(j) = justify {
-                t.para.justify = j;
+                let span = para_span(range, t);
+                t.edit_paras(span, |pa| pa.justify = j);
             }
             refresh_bounds(t);
         }
@@ -292,10 +432,18 @@ pub(crate) fn reshape_area_with(t: &mut TextObject, f: impl FnOnce(&mut TextObje
         }
         _ => false,
     };
+    let height = |t: &TextObject| auto_height_frame(t).map(|b| b.height());
+    let was = height(t);
     if !(f(t) && within(t)) {
         t.kind = before;
         return false;
     }
+    // Setting the height by hand turns Auto Size off (as in Illustrator); a new width keeps it.
+    if let (Some(a), Some(b)) = (was, height(t))
+        && (a - b).abs() > 1e-6
+    {
+        t.area.fit = vectorcraft_doc::AreaFit::None;
+    }
     refresh_bounds(t);
     true
 }
@@ -334,6 +482,60 @@ fn size_area(t: &mut TextObject, w: Option<f64>, h: Option<f64>) -> bool {
     reshape_area_with(t, |t| t.transform_area(a))
 }
 
+/// The fit `p` asks for (`fit`: none|autoHeight|shrinkText or `{"shrinkText": {"minPercent"}}`,
+/// `fitMinPercent`), starting from `cur`. None when `p` sets neither (or only `fitMinPercent`
+/// while the fit isn't Shrink Text).
+pub(crate) fn fit_param(p: &Value, cur: AreaFit, c: &str) -> Result<Option<AreaFit>> {
+    let min = p.get("fitMinPercent").and_then(Value::as_f64);
+    let cur_min = match cur {
+        AreaFit::ShrinkText { min_percent } => Some(min_percent),
+        _ => None,
+    };
+    let fit = match p.get("fit") {
+        None | Some(Value::Null) => match (cur, min) {
+            (AreaFit::ShrinkText { .. }, Some(m)) => AreaFit::ShrinkText { min_percent: m },
+            _ => return Ok(None),
+        },
+        Some(Value::String(id)) => {
+            AreaFit::parse(id, min.or(cur_min)).ok_or_else(|| bad(c, format!("fit must be none|autoHeight|shrinkText, got {id}")))?
+        }
+        Some(v) => match serde_json::from_value::<AreaFit>(v.clone()).map_err(|e| bad(c, format!("bad fit: {e}")))? {
+            AreaFit::ShrinkText { min_percent } => AreaFit::ShrinkText { min_percent: min.unwrap_or(min_percent) },
+            f => f,
+        },
+    };
+    Ok(Some(match fit {
+        AreaFit::ShrinkText { min_percent } => AreaFit::ShrinkText { min_percent: AreaFit::clamp_percent(min_percent) },
+        f => f,
+    }))
+}
+
+/// Area type's options as `text.areaOptions` reports them: the Area Type Options with `fit` as
+/// its id and `fitMinPercent` beside it, the frame's `width` and `height`, and whether the text
+/// `overflow`s its frame at `fitScale` (Shrink Text to Fit's factor; 1 unshrunk).
+pub(crate) fn area_options_json(t: &TextObject) -> Result<Value> {
+    let mut v = serde_json::to_value(&t.area).map_err(|e| EngineError::Other(e.to_string()))?;
+    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), t);
+    if let Some(o) = v.as_object_mut() {
+        o.insert("fit".into(), json!(t.area.fit.id()));
+        let min = match t.area.fit {
+            AreaFit::ShrinkText { min_percent } => min_percent,
+            _ => AreaFit::DEFAULT_MIN_PERCENT,
+        };
+        o.insert("fitMinPercent".into(), json!(min));
+        if let Some((w, h, _)) = area_size(t) {
+            o.insert("width".into(), json!(w));
+            o.insert("height".into(), json!(h));
+        }
+        o.insert("overflow".into(), json!(lay.overflow));
+        o.insert("fitScale".into(), json!(lay.fit_scale));
+    }
+    Ok(v)
+}
+
+/// The [`vectorcraft_doc::AreaOptions`] keys `text.areaOptions` merges as they are.
+const AREA_KEYS: [&str; 7] = ["rows", "columns", "gutter", "inset", "firstBaseline", "firstBaselineMin", "verticalAlign"];
+
 fn area_options(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "text.areaOptions";
     let ids: Vec<NodeId> = {
@@ -343,34 +545,35 @@ fn area_options(s: &mut Session, p: &Value) -> Result<Value> {
     let first = *ids.first().ok_or_else(|| bad(C, "select area type (text in a frame)"))?;
     let options = |s: &Session| -> Result<Value> {
         let t = area_text(s.doc()?.doc.node(first)).ok_or_else(|| bad(C, "select area type (text in a frame)"))?;
-        let mut v = serde_json::to_value(&t.area).map_err(|e| EngineError::Other(e.to_string()))?;
-        if let (Some(o), Some((w, h, _))) = (v.as_object_mut(), area_size(t)) {
-            o.insert("width".into(), json!(w));
-            o.insert("height".into(), json!(h));
-        }
-        Ok(v)
+        area_options_json(t)
     };
-    let mut v = options(s)?;
-    let size = |k: &str| p.get(k).and_then(Value::as_f64).map(|x| x.clamp(1.0, 100_000.0));
-    let (w, h) = (size("width"), size("height"));
-    let mut changed = w.is_some() || h.is_some();
+    let cur = area_text(s.doc()?.doc.node(first)).map(|t| t.area.clone()).unwrap_or_default();
+    let fit = fit_param(p, cur.fit, C)?;
+    let mut v = serde_json::to_value(&cur).map_err(|e| EngineError::Other(e.to_string()))?;
+    let size = |k: &str| p.get(k).and_then(Value::as_f64).filter(|x| x.is_finite()).map(|x| x.clamp(1.0, 100_000.0));
+    let (w, mut h) = (size("width"), size("height"));
+    let mut changed = w.is_some() || h.is_some() || fit.is_some();
     if let (Some(o), Some(src)) = (v.as_object_mut(), p.as_object()) {
-        for (k, val) in src {
-            if o.contains_key(k) && !matches!(k.as_str(), "ids" | "width" | "height") {
-                o.insert(k.clone(), val.clone());
-                changed = true;
-            }
+        for (k, val) in src.iter().filter(|(k, _)| AREA_KEYS.contains(&k.as_str())) {
+            o.insert(k.clone(), val.clone());
+            changed = true;
         }
     }
     if !changed {
-        return Ok(v);
+        return options(s);
     }
     let mut opts: vectorcraft_doc::AreaOptions = serde_json::from_value(v).map_err(|e| bad(C, e.to_string()))?;
     opts.rows = opts.rows.clamp(1, 100);
     opts.columns = opts.columns.clamp(1, 100);
-    opts.gutter = opts.gutter.clamp(0.0, 10_000.0);
-    opts.inset = opts.inset.clamp(0.0, 10_000.0);
-    opts.first_baseline_min = opts.first_baseline_min.clamp(0.0, 10_000.0);
+    let finite = |x: f64| if x.is_finite() { x } else { 0.0 };
+    opts.gutter = finite(opts.gutter).clamp(0.0, 10_000.0);
+    opts.inset = finite(opts.inset).clamp(0.0, 10_000.0);
+    opts.first_baseline_min = finite(opts.first_baseline_min).clamp(0.0, 10_000.0);
+    opts.fit = fit.unwrap_or(cur.fit);
+    if opts.fit == AreaFit::AutoHeight {
+        // Auto Size sets the height (Illustrator's dialog turns the Height field off).
+        h = None;
+    }
     s.edit("Area Type Options", |d, _| {
         for id in &ids {
             if let Some(NodeKind::Text(t)) = d.node_mut(*id).map(|n| &mut n.kind) {
@@ -530,7 +733,10 @@ mod area_tests {
         s.execute("text.setFormat", &json!({"leadingModel": "emBoxTop"})).unwrap();
         let t = text(&s);
         assert_eq!(t.para.leading_model, LeadingModel::EmBoxTop);
-        assert_ne!(t.cached_bounds, before, "the first line moves up to the frame's top");
+        // The fallback used without craft-fonts has no glyph metrics to move the first line.
+        if !vectorcraft_text::CRAFT_FONTS.is_empty() {
+            assert_ne!(t.cached_bounds, before, "the first line moves up to the frame's top");
+        }
         assert_eq!(serde_json::to_value(&t.para).unwrap()["leading_model"], "emBoxTop");
         s.execute("edit.undo", &json!({})).unwrap();
         assert!(serde_json::to_value(&text(&s).para).unwrap().get("leading_model").is_none());
@@ -641,7 +847,8 @@ fn headline_fit(t: &TextObject, tracking: f64) -> Option<(f64, f64, usize)> {
     let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &probe);
     let cell = lay.frames.first()?;
     let line = lay.lines.first()?;
-    let avail = cell.width() - 2.0 * t.area.inset - t.para.left_indent - t.para.right_indent;
+    let para = t.para_at(0);
+    let avail = cell.width() - 2.0 * t.area.inset - para.left_indent - para.right_indent;
     Some((line.x1 - line.x0, avail, lay.lines.iter().filter(|l| l.start < para_end).count()))
 }
 

crates/engine/src/cmd/typemenu.rs

@@ -272,7 +272,7 @@ fn to_area(s: &mut Session, p: &Value) -> Result<Value> {
             let top = lay.lines.first().map(|l| l.baseline - l.ascent).unwrap_or(b.y0).min(b.y0);
             let slack = size * 0.5;
             // Slack goes where the alignment leaves room, so the text doesn't move or rewrap.
-            let (sl, sr) = match t.para.justify {
+            let (sl, sr) = match t.para_at(0).justify {
                 Justify::Center | Justify::JustifyCenter => (slack * 0.5, slack * 0.5),
                 Justify::Right | Justify::JustifyRight => (slack, 0.0),
                 Justify::Auto if lay.lines.first().is_some_and(|l| l.rtl) => (slack, 0.0),
@@ -315,20 +315,22 @@ fn to_point(s: &mut Session, p: &Value) -> Result<Value> {
             breaks.sort_unstable();
             breaks.dedup();
             for b in breaks.into_iter().rev() {
+                // Each wrapped line becomes a paragraph with its paragraph's attributes.
                 if plain.as_bytes().get(b - 1) == Some(&b' ') {
                     if let Some((ri, bi)) = locate(&t.runs, b - 1) {
+                        t.splice_paras(b - 1, b, "\n");
                         t.runs[ri].text.replace_range(bi..bi + 1, "\n");
                     }
                 } else if let Some((ri, bi)) = locate(&t.runs, b) {
+                    t.splice_paras(b, b, "\n");
                     t.runs[ri].text.insert(bi, '\n');
                 }
             }
             // The point origin sits where the alignment anchors the first line.
-            let (x0, x1) = lay
-                .lines
-                .first()
-                .map_or((fb.x0, fb.x1), |l| (l.avail.0 - t.para.left_indent - t.para.first_line_indent, l.avail.1 + t.para.right_indent));
-            let ox = match t.para.justify {
+            let p0 = t.para_at(0);
+            let (x0, x1) =
+                lay.lines.first().map_or((fb.x0, fb.x1), |l| (l.avail.0 - p0.left_indent - p0.first_line_indent, l.avail.1 + p0.right_indent));
+            let ox = match p0.justify {
                 Justify::Center | Justify::JustifyCenter => (x0 + x1) * 0.5,
                 Justify::Right | Justify::JustifyRight => x1,
                 Justify::Auto if lay.lines.first().is_some_and(|l| l.rtl) => x1,
@@ -646,7 +648,7 @@ fn strip_formatting(n: &mut vectorcraft_doc::Node) {
     if let NodeKind::Text(t) = &mut n.kind {
         let text = t.plain_text();
         t.runs = vec![TextRun { text, style: CharStyle::default() }];
-        t.para = Default::default();
+        t.set_all_paras(Default::default());
         refresh_bounds(t);
     }
     if let Some(ch) = n.children_mut() {

crates/engine/src/inspect.rs

@@ -80,7 +80,19 @@ pub fn node_summary_opts(n: &Node, opts: SummaryOpts) -> Value {
             v["anchors"] = json!(path.anchor_count());
             v["closed"] = json!(path.is_closed());
         }
-        NodeKind::Text(t) => v["text"] = json!(t.plain_text()),
+        NodeKind::Text(t) => {
+            v["text"] = json!(t.plain_text());
+            // Area type and type on a path: does the text fit (the red overflow "+")? Area type
+            // also reports its fit and Shrink Text's factor (1 unshrunk).
+            if !matches!(t.kind, vectorcraft_doc::TextKind::Point) {
+                let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), t);
+                v["overflow"] = json!(lay.overflow);
+                if matches!(t.kind, vectorcraft_doc::TextKind::Area { .. }) {
+                    v["fit"] = json!(t.area.fit.id());
+                    v["fitScale"] = json!(lay.fit_scale);
+                }
+            }
+        }
         _ => {}
     }
     if let Some(ch) = n.children() {

crates/engine/src/lib.rs

@@ -801,6 +801,9 @@ impl Default for Session {
 
 impl Session {
     pub fn new() -> Self {
+        // Placed documents are read by the native format's loader.
+        vectorcraft_doc::placed_document::set_loader(cmd::place::document::read_document);
+        vectorcraft_doc::placed_document::set_file_reader(cmd::place::document::read_file_again);
         Self {
             docs: vec![],
             active: None,
@@ -1097,27 +1100,30 @@ impl Session {
         let before_sel = st.selection.clone();
         let doc = Arc::make_mut(&mut st.doc);
         let result = match f(doc, &mut st.selection) {
-            Ok(v) => {
-                // Text Wrap: area type follows its wrap objects; then threads re-flow.
-                cmd::textwrap::refresh(Arc::make_mut(&mut st.doc));
-                // Opacity-mask editing: the mask follows its art on the editing layer.
-                if st.doc.mask_edit.is_some() {
-                    cmd::maskedit::sync(Arc::make_mut(&mut st.doc));
+            Ok(v) => match cmd::shaper::refresh(&before, Arc::make_mut(&mut st.doc)) {
+                Err(e) => Err(e),
+                Ok(()) => {
+                    // Text Wrap: area type follows its wrap objects; then threads re-flow.
+                    cmd::textwrap::refresh(Arc::make_mut(&mut st.doc));
+                    // Opacity-mask editing: the mask follows its art on the editing layer.
+                    if st.doc.mask_edit.is_some() {
+                        cmd::maskedit::sync(Arc::make_mut(&mut st.doc));
+                    }
+                    // Threaded text re-flows when any of its frames changed.
+                    if !st.doc.text_threads.is_empty() {
+                        cmd::threads::reflow(&before, Arc::make_mut(&mut st.doc));
+                    }
+                    // Asset Export: assets let go of deleted art.
+                    if !st.doc.assets.is_empty() {
+                        Arc::make_mut(&mut st.doc).prune_assets();
+                    }
+                    if doc_sane(&st.doc, &st.selection) {
+                        Ok(v)
+                    } else {
+                        Err(EngineError::Other("result would exceed the canvas (coordinates out of range)".into()))
+                    }
                 }
-                // Threaded text re-flows when any of its frames changed.
-                if !st.doc.text_threads.is_empty() {
-                    cmd::threads::reflow(&before, Arc::make_mut(&mut st.doc));
-                }
-                // Asset Export: assets let go of deleted art.
-                if !st.doc.assets.is_empty() {
-                    Arc::make_mut(&mut st.doc).prune_assets();
-                }
-                if doc_sane(&st.doc, &st.selection) {
-                    Ok(v)
-                } else {
-                    Err(EngineError::Other("result would exceed the canvas (coordinates out of range)".into()))
-                }
-            }
+            },
             Err(e) => Err(e),
         };
         match result {
@@ -1290,6 +1296,8 @@ mod tests_adjust;
 #[cfg(test)]
 mod tests_appearance;
 #[cfg(test)]
+mod tests_areafit;
+#[cfg(test)]
 mod tests_assets;
 #[cfg(test)]
 mod tests_attributes;
@@ -1426,6 +1434,8 @@ mod tests_paintproxy;
 #[cfg(test)]
 mod tests_panelcmds;
 #[cfg(test)]
+mod tests_paragraphs;
+#[cfg(test)]
 mod tests_pathops;
 #[cfg(test)]
 mod tests_pathtype;
@@ -1450,6 +1460,8 @@ mod tests_perspgrid;
 #[cfg(test)]
 mod tests_place;
 #[cfg(test)]
+mod tests_placed_document;
+#[cfg(test)]
 mod tests_plugins;
 #[cfg(test)]
 mod tests_prefs;
@@ -1486,6 +1498,8 @@ mod tests_saveoptions;
 #[cfg(test)]
 mod tests_scalestrokes;
 #[cfg(test)]
+mod tests_shaper;
+#[cfg(test)]
 mod tests_slices;
 #[cfg(test)]
 mod tests_smartguides;

crates/engine/src/tests.rs

@@ -1,6 +1,7 @@
 use serde_json::json;
 
 use super::*;
+use vectorcraft_geom::Point;
 use vectorcraft_tools::{PointerEvent, PointerKind, ToolKey};
 
 fn session() -> Session {
@@ -198,6 +199,37 @@ fn align_left() {
     assert_eq!(s.doc().unwrap().doc.node(b).unwrap().geometric_bounds().unwrap().x0, 0.0);
 }
 
+/// #541: with the Selection tool, a click on one object of the selection makes it the key object:
+/// aligning to the key moves the others to it, Distribute Spacing spaces them from it, and a click
+/// on the key again lets it go.
+#[test]
+fn a_click_sets_the_key_object_that_align_and_spacing_keep_still() {
+    let mut s = session();
+    let a = rect(&mut s, 0.0, 0.0, 10.0, 10.0);
+    let b = rect(&mut s, 100.0, 30.0, 20.0, 20.0);
+    let c = rect(&mut s, 300.0, 60.0, 10.0, 10.0);
+    s.execute("select.set", &json!({"ids": [a.0, b.0, c.0]})).unwrap();
+    let v = ViewInfo::default();
+    s.select_tool("selection", v).unwrap();
+    let click = |s: &mut Session| {
+        for kind in [PointerKind::Down, PointerKind::Up] {
+            s.pointer(&PointerEvent::new(kind, 110.0, 40.0), v).unwrap();
+        }
+    };
+    click(&mut s);
+    assert_eq!(s.doc().unwrap().selection.key, Some(b));
+    assert_eq!(s.doc().unwrap().selection.objects.len(), 3, "the selection stays");
+    let x0 = |s: &Session, id| s.doc().unwrap().doc.node(id).unwrap().geometric_bounds().unwrap().x0;
+    // With a key object, aligning aligns to it (the Control bar and Properties name no target).
+    s.execute("object.align", &json!({"horizontal": "left", "bounds": "geometric"})).unwrap();
+    assert_eq!((x0(&s, a), x0(&s, b), x0(&s, c)), (100.0, 100.0, 100.0), "the others moved to the key");
+    s.execute("edit.undo", &json!({})).unwrap();
+    s.execute("object.distributeSpacing", &json!({"axis": "horizontal", "spacing": 5, "bounds": "geometric"})).unwrap();
+    assert_eq!((x0(&s, a), x0(&s, b), x0(&s, c)), (85.0, 100.0, 125.0), "5 pt apart, the key still");
+    click(&mut s);
+    assert_eq!(s.doc().unwrap().selection.key, None, "a click on the key again lets it go");
+}
+
 #[test]
 fn selection_tool_drag_is_one_undo_step() {
     let mut s = session();
@@ -664,7 +696,7 @@ fn snap_to_pixel_rounds_drawing_and_moves() {
 }
 
 #[test]
-fn shaper_turns_rough_strokes_into_live_shapes_and_scribbles_delete() {
+fn shaper_turns_rough_strokes_into_live_shapes_and_scribbles_punch_fills() {
     let mut s = session();
     let v = ViewInfo { smart_guides: false, ..Default::default() };
     s.select_tool("shaper", v).unwrap();
@@ -694,10 +726,86 @@ fn shaper_turns_rough_strokes_into_live_shapes_and_scribbles_delete() {
         "{:?}",
         n.kind_label()
     );
-    // A zig-zag over it deletes it.
+    // A zig-zag inside it clears its fill while retaining the editable original and stroke.
     let zig: Vec<(f64, f64)> = (0..30).map(|i| (150.0 + (i % 2) as f64 * 80.0, 120.0 + i as f64 * 2.0)).collect();
     stroke(&mut s, &zig);
+    assert_eq!(s.doc().unwrap().doc.node(id).unwrap(), &n);
+    let group = s.doc().unwrap().doc.node(s.doc().unwrap().selection.objects[0]).unwrap();
+    assert!(group.shaper.is_some());
+    assert!(group.children().unwrap().iter().skip(1).all(|n| n.appearance.fill_paint().is_none()));
+    assert!(group.children().unwrap().iter().skip(1).any(|n| !n.appearance.stroke_paint().is_none()));
+}
+
+#[test]
+fn shaper_square_started_mid_edge_closes_on_pointer_release_and_undoes_once() {
+    let mut s = session();
+    let v = ViewInfo { smart_guides: false, ..Default::default() };
+    s.select_tool("shaper", v).unwrap();
+    let undo = s.doc().unwrap().history.undo.len();
+    for (kind, x, y) in [
+        (PointerKind::Down, 150.0, 100.0),
+        (PointerKind::Drag, 200.0, 105.0),
+        (PointerKind::Drag, 194.0, 200.0),
+        (PointerKind::Drag, 110.0, 191.0),
+        (PointerKind::Drag, 100.0, 100.0),
+        (PointerKind::Up, 150.0, 100.0),
+    ] {
+        s.pointer(&PointerEvent::new(kind, x, y), v).unwrap();
+    }
+    let id = *s.doc().unwrap().selection.objects.first().expect("recognized square");
+    assert!(matches!(
+        s.doc().unwrap().doc.node(id).unwrap().kind,
+        vectorcraft_doc::NodeKind::Path { live: Some(vectorcraft_doc::LiveShape::Rectangle { .. }), .. }
+    ));
+    assert_eq!(s.doc().unwrap().history.undo.len(), undo + 1);
+    s.execute("edit.undo", &json!({})).unwrap();
     assert!(s.doc().unwrap().doc.node(id).is_none());
+    s.execute("edit.redo", &json!({})).unwrap();
+    assert!(s.doc().unwrap().doc.node(id).is_some());
+}
+
+#[test]
+fn shaper_creates_upright_or_inverted_live_triangles_with_one_undo_step() {
+    let v = ViewInfo { smart_guides: false, ..Default::default() };
+    for direction in [0.0_f64, 180.0] {
+        let mut s = session();
+        s.select_tool("shaper", v).unwrap();
+        let undo = s.doc().unwrap().history.undo.len();
+        let corners: Vec<Point> = (0..3)
+            .map(|i| {
+                let angle = (direction + 7.0 - 90.0).to_radians() + std::f64::consts::TAU * i as f64 / 3.0;
+                Point::new(200.0 + 70.0 * angle.cos(), 200.0 + 70.0 * angle.sin())
+            })
+            .collect();
+        let mut pts = vec![];
+        for i in 0..3 {
+            for j in 0..20 {
+                pts.push(corners[i] + (corners[(i + 1) % 3] - corners[i]) * (j as f64 / 20.0));
+            }
+        }
+        // Begin midway along an edge; the release closes the final segment.
+        pts.rotate_left(7);
+        s.pointer(&PointerEvent::new(PointerKind::Down, pts[0].x, pts[0].y), v).unwrap();
+        for p in &pts[1..] {
+            s.pointer(&PointerEvent::new(PointerKind::Drag, p.x, p.y), v).unwrap();
+        }
+        s.pointer(&PointerEvent::new(PointerKind::Up, pts[0].x, pts[0].y), v).unwrap();
+        let id = *s.doc().unwrap().selection.objects.first().expect("recognized triangle");
+        let node = s.doc().unwrap().doc.node(id).unwrap().clone();
+        let vectorcraft_doc::NodeKind::Path { live: Some(vectorcraft_doc::LiveShape::Polygon { sides: 3, xf, .. }), .. } = &node.kind else {
+            panic!("expected live triangle, got {:?}", node.kind_label());
+        };
+        let [a, b, c, d, _, _] = xf.as_coeffs();
+        let (sin, cos) = direction.to_radians().sin_cos();
+        for (actual, expected) in [(a, cos), (b, sin), (c, -sin), (d, cos)] {
+            assert!((actual - expected).abs() < 1e-12, "direction {direction}, transform {xf:?}");
+        }
+        assert_eq!(s.doc().unwrap().history.undo.len(), undo + 1);
+        s.execute("edit.undo", &json!({})).unwrap();
+        assert!(s.doc().unwrap().doc.node(id).is_none());
+        s.execute("edit.redo", &json!({})).unwrap();
+        assert_eq!(s.doc().unwrap().doc.node(id).unwrap(), &node);
+    }
 }
 
 #[test]

crates/engine/src/tests_areafit.rs

@@ -0,0 +1,242 @@
+//! Area type fitting: Auto Size (the frame's height follows the text), Shrink Text to Fit, and
+//! overflow reporting.
+
+use serde_json::{Value, json};
+use vectorcraft_doc::{AreaFit, NodeKind, TextKind, TextObject};
+use vectorcraft_geom::Rect;
+use vectorcraft_tools::{Mods, PointerEvent, PointerKind, ToolKey};
+
+use super::*;
+
+const STORY: &str = "The quick brown fox jumps over the lazy dog. A second sentence follows the first one here. Then a third one ends it.";
+
+fn session() -> Session {
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
+    s
+}
+
+fn area(s: &mut Session, w: f64, h: f64, text: &str, extra: Value) -> NodeId {
+    let mut a = json!({"width": w, "height": h});
+    if let (Some(a), Some(e)) = (a.as_object_mut(), extra.as_object()) {
+        a.extend(e.clone());
+    }
+    let id = s.execute("text.create", &json!({"x": 40, "y": 40, "size": 12, "area": a, "text": text})).unwrap()["id"].as_u64().unwrap();
+    NodeId(id)
+}
+
+fn text(s: &Session, id: NodeId) -> TextObject {
+    match &s.doc().unwrap().doc.node(id).unwrap().kind {
+        NodeKind::Text(t) => (**t).clone(),
+        k => panic!("not text: {k:?}"),
+    }
+}
+
+fn frame(s: &Session, id: NodeId) -> Rect {
+    match text(s, id).kind {
+        TextKind::Area { frame } => frame.bounds().unwrap(),
+        k => panic!("not area type: {k:?}"),
+    }
+}
+
+fn overflows(s: &Session, id: NodeId) -> bool {
+    vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &text(s, id)).overflow
+}
+
+fn undo_len(s: &Session) -> usize {
+    s.doc().unwrap().history.undo.len()
+}
+
+#[test]
+fn area_options_set_and_report_the_fit() {
+    let mut s = session();
+    let id = area(&mut s, 120.0, 30.0, STORY, json!({}));
+    s.execute("select.set", &json!({"ids": [id.0]})).unwrap();
+    let q = s.execute("text.areaOptions", &json!({})).unwrap();
+    assert_eq!((q["fit"].as_str(), q["fitMinPercent"].as_f64()), (Some("none"), Some(50.0)));
+    assert_eq!((q["overflow"].as_bool(), q["fitScale"].as_f64()), (Some(true), Some(1.0)));
+    let n = undo_len(&s);
+    let r = s.execute("text.areaOptions", &json!({"fit": "shrinkText", "fitMinPercent": 20})).unwrap();
+    assert_eq!(undo_len(&s), n + 1);
+    assert_eq!((r["fit"].as_str(), r["fitMinPercent"].as_f64()), (Some("shrinkText"), Some(20.0)));
+    assert_eq!(r["overflow"], false, "{r}");
+    let f = r["fitScale"].as_f64().unwrap();
+    assert!((0.2..1.0).contains(&f), "{f}");
+    assert_eq!(text(&s, id).area.fit, AreaFit::ShrinkText { min_percent: 20.0 });
+    assert_eq!(text(&s, id).runs[0].style.size, 12.0, "the stored size stays");
+    // The minimum alone, clamped; the object form; and bad values.
+    s.execute("text.areaOptions", &json!({"fitMinPercent": 3})).unwrap();
+    assert_eq!(text(&s, id).area.fit, AreaFit::ShrinkText { min_percent: 10.0 });
+    s.execute("text.areaOptions", &json!({"fit": {"shrinkText": {"minPercent": 95}}})).unwrap();
+    assert_eq!(text(&s, id).area.fit, AreaFit::ShrinkText { min_percent: 95.0 });
+    assert_eq!(s.execute("text.areaOptions", &json!({})).unwrap()["overflow"], true, "95 % is not enough");
+    assert!(s.execute("text.areaOptions", &json!({"fit": "squash"})).is_err());
+    assert!(s.execute("text.areaOptions", &json!({"fit": 7})).is_err());
+    // The reply's own keys go back in unchanged (the dialog sends everything).
+    let q = s.execute("text.areaOptions", &json!({})).unwrap();
+    let n = undo_len(&s);
+    let again = s.execute("text.areaOptions", &q).unwrap();
+    assert_eq!(again, q);
+    assert_eq!(undo_len(&s), n + 1);
+    // Undo back to no fit.
+    while text(&s, id).area.fit != AreaFit::None {
+        s.execute("edit.undo", &json!({})).unwrap();
+    }
+    assert!(overflows(&s, id));
+}
+
+#[test]
+fn inspect_reports_overflow_and_fit_scale() {
+    let mut s = session();
+    let id = area(&mut s, 120.0, 30.0, STORY, json!({"fit": "shrinkText", "fitMinPercent": 10}));
+    s.execute("text.create", &json!({"x": 10, "y": 500, "text": "point"})).unwrap();
+    let doc = s.execute("document.inspect", &json!({})).unwrap();
+    let kids = doc["layers"][0]["children"].as_array().unwrap();
+    let node = kids.iter().find(|k| k["id"] == id.0).unwrap();
+    assert_eq!(node["overflow"], false);
+    assert_eq!(node["fit"], "shrinkText");
+    assert!(node["fitScale"].as_f64().unwrap() < 1.0);
+    let point = kids.iter().find(|k| k["id"] != id.0).unwrap();
+    assert!(point.get("overflow").is_none() && point.get("fitScale").is_none(), "point type never overflows");
+    s.execute("select.set", &json!({"ids": [id.0]})).unwrap();
+    s.execute("text.areaOptions", &json!({"fit": "none"})).unwrap();
+    let doc = s.execute("document.inspect", &json!({})).unwrap();
+    let node = doc["layers"][0]["children"].as_array().unwrap().iter().find(|k| k["id"] == id.0).unwrap().clone();
+    assert_eq!((node["overflow"].as_bool(), node["fitScale"].as_f64(), node["fit"].as_str()), (Some(true), Some(1.0), Some("none")));
+}
+
+#[test]
+fn auto_height_follows_edits_in_the_same_undo_step() {
+    let mut s = session();
+    let id = area(&mut s, 200.0, 300.0, "One line", json!({"fit": "autoHeight"}));
+    let one = frame(&s, id);
+    assert!(one.height() < 30.0, "the frame fits one line: {one:?}");
+    assert_eq!((one.x0, one.y0, one.width()), (0.0, 0.0, 200.0), "top and width stay");
+    assert!(!overflows(&s, id));
+    let n = undo_len(&s);
+    s.execute("text.editRange", &json!({"id": id.0, "start": 8, "insert": format!(" {STORY}")})).unwrap();
+    assert_eq!(undo_len(&s), n + 1);
+    let grown = frame(&s, id);
+    assert!(grown.height() > one.height() * 2.0, "{grown:?}");
+    assert!(!overflows(&s, id), "the grown frame holds the text");
+    // Tight: a point less overflows.
+    let mut t = text(&s, id);
+    t.area.fit = AreaFit::None;
+    t.kind = TextKind::Area {
+        frame: vectorcraft_geom::PathData::from_bezpath(&vectorcraft_geom::Shape::to_path(&Rect::new(0.0, 0.0, 200.0, grown.height() - 1.0), 0.1)),
+    };
+    assert!(vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t).overflow);
+    // Character changes resize it too.
+    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 0, "end": 3, "size": 40})).unwrap();
+    assert!(frame(&s, id).height() > grown.height());
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(frame(&s, id), grown);
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(frame(&s, id), one, "one undo restores the text and the frame");
+    assert_eq!(text(&s, id).plain_text(), "One line");
+}
+
+#[test]
+fn auto_height_follows_typing_with_the_type_tool() {
+    let mut s = session();
+    s.prefs.auto_size_area_type = true;
+    // An empty frame (no placeholder text), so its first height is one line.
+    s.prefs.placeholder_text = false;
+    let v = ViewInfo::default();
+    s.select_tool("type", v).unwrap();
+    for (kind, (x, y)) in [(PointerKind::Down, (100.0, 100.0)), (PointerKind::Drag, (300.0, 400.0)), (PointerKind::Up, (300.0, 400.0))] {
+        s.pointer(&PointerEvent::new(kind, x, y), v).unwrap();
+    }
+    let id = s.doc().unwrap().selection.objects[0];
+    assert_eq!(text(&s, id).area.fit, AreaFit::AutoHeight, "the preference gives new area type Auto Size");
+    let empty = frame(&s, id);
+    assert!(empty.height() < 30.0, "{empty:?}");
+    let n = undo_len(&s);
+    for word in STORY.split_inclusive(' ') {
+        s.tool_text(word, v).unwrap();
+    }
+    s.tool_key(ToolKey::Escape, Mods::default(), v).unwrap();
+    assert_eq!(text(&s, id).plain_text(), STORY);
+    assert_eq!(undo_len(&s), n + 1, "one typing step");
+    let typed = frame(&s, id);
+    assert!(typed.height() > empty.height() * 2.0, "{typed:?}");
+    assert!(!overflows(&s, id));
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(frame(&s, id), empty);
+    assert_eq!(text(&s, id).plain_text(), "");
+    s.execute("edit.redo", &json!({})).unwrap();
+    assert_eq!(frame(&s, id), typed);
+}
+
+#[test]
+fn auto_height_in_columns_and_by_hand() {
+    let mut s = session();
+    let id = area(&mut s, 300.0, 400.0, &STORY.repeat(3), json!({"fit": "autoHeight"}));
+    let one = frame(&s, id).height();
+    s.execute("select.set", &json!({"ids": [id.0]})).unwrap();
+    // Height is ignored while Auto Size is on.
+    let r = s.execute("text.areaOptions", &json!({"columns": 2, "gutter": 12, "height": 500})).unwrap();
+    let two = r["height"].as_f64().unwrap();
+    assert!(two < 500.0 && two > one * 0.5, "{one} → {two}");
+    assert_eq!(r["overflow"], false);
+    assert_eq!(r["fit"], "autoHeight");
+    // The least height the two columns fit: a point less overflows, and both columns are used.
+    let mut t = text(&s, id);
+    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
+    assert!(lay.glyphs.iter().any(|g| g.origin.x > 160.0), "text flows into the second column");
+    t.area.fit = AreaFit::None;
+    t.kind = TextKind::Area {
+        frame: vectorcraft_geom::PathData::from_bezpath(&vectorcraft_geom::Shape::to_path(&Rect::new(0.0, 0.0, 300.0, two - 1.0), 0.1)),
+    };
+    assert!(vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t).overflow);
+    // Dragging the bottom edge sets the height by hand: Auto Size goes off.
+    let b = frame(&s, id);
+    s.execute("text.reshapeArea", &json!({"id": id.0, "anchors": [[0, 2], [0, 3]], "dx": 0, "dy": 50})).unwrap();
+    assert_eq!(text(&s, id).area.fit, AreaFit::None);
+    assert!((frame(&s, id).height() - (b.height() + 50.0)).abs() < 1e-6);
+    s.execute("edit.undo", &json!({})).unwrap();
+    // A new width keeps it: the height follows the reflow.
+    s.execute("text.reshapeArea", &json!({"id": id.0, "anchors": [[0, 1], [0, 2]], "dx": 100, "dy": 0})).unwrap();
+    assert_eq!(text(&s, id).area.fit, AreaFit::AutoHeight);
+    assert!(frame(&s, id).height() < b.height());
+    // Point type has no frame to size.
+    let p = s.execute("text.create", &json!({"x": 10, "y": 10, "text": "x"})).unwrap()["id"].as_u64().unwrap();
+    s.execute("select.set", &json!({"ids": [p]})).unwrap();
+    assert!(s.execute("text.areaOptions", &json!({"fit": "autoHeight"})).is_err(), "point type has no area options");
+}
+
+#[test]
+fn shrink_text_round_trips_through_the_native_format() {
+    let mut s = session();
+    let id = area(&mut s, 120.0, 30.0, STORY, json!({"fit": "shrinkText", "fitMinPercent": 35}));
+    let doc = s.doc().unwrap().doc.clone();
+    let bytes = vectorcraft_format::save(&doc, false);
+    let back = vectorcraft_format::load(&bytes).unwrap();
+    let NodeKind::Text(t) = &back.node(id).unwrap().kind else { panic!() };
+    assert_eq!(t.area.fit, AreaFit::ShrinkText { min_percent: 35.0 });
+}
+
+#[test]
+fn auto_height_follows_the_leading_model_and_character_alignment() {
+    let mut s = session();
+    let id = area(&mut s, 200.0, 300.0, STORY, json!({"fit": "autoHeight"}));
+    let roman = frame(&s, id);
+    s.execute("select.set", &json!({"ids": [id.0]})).unwrap();
+    // Top-to-Top leading: the first line moves up to touch the frame, the frame follows.
+    s.execute("text.setFormat", &json!({"leadingModel": "emBoxTop"})).unwrap();
+    let em = frame(&s, id);
+    assert_ne!(em.height(), roman.height());
+    assert!(!overflows(&s, id), "the frame holds the text under emBoxTop");
+    // Mixed sizes aligned on the em box centre still fit exactly.
+    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 0, "end": 3, "size": 30})).unwrap();
+    s.execute("text.setFormat", &json!({"charAlign": "emBoxCenter"})).unwrap();
+    let mixed = frame(&s, id);
+    assert!(mixed.height() > em.height());
+    assert!(!overflows(&s, id));
+    let mut t = text(&s, id);
+    t.area.fit = AreaFit::None;
+    t.kind = TextKind::Area {
+        frame: vectorcraft_geom::PathData::from_bezpath(&vectorcraft_geom::Shape::to_path(&Rect::new(0.0, 0.0, 200.0, mixed.height() - 1.0), 0.1)),
+    };
+    assert!(vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t).overflow, "tight");
+}

crates/engine/src/tests_attributes.rs

@@ -190,3 +190,27 @@ fn svg_export_links_objects_and_import_reads_the_links_back() {
     });
     assert_eq!(urls, [Some("https://example.com/?a=1&b=2".to_string()), None], "the link wraps the path alone");
 }
+
+/// #522: an object's own data (SVG `data-*` attributes) is set with `object.setProps {data}`,
+/// undone in one step, written to SVG and kept by the native format.
+#[test]
+fn object_data_is_set_saved_and_written_to_svg() {
+    let mut s = session();
+    let a = rect(&mut s, 10.0);
+    let data = |s: &Session| s.doc().unwrap().doc.node(a).unwrap().attrs.as_deref().map(|x| x.data.clone()).unwrap_or_default();
+    let pair = |k: &str, v: &str| (k.to_string(), v.to_string());
+    run(&mut s, "object.setProps", json!({"data": {"pivot": "60,100", "z": 3}}));
+    assert_eq!(data(&s), [pair("pivot", "60,100"), pair("z", "3")], "values are text");
+    run(&mut s, "object.setProps", json!({"data": {"data-pivot": "1,2", "z": null}}));
+    assert_eq!(data(&s), [pair("pivot", "1,2")], "a data- prefix is optional; null removes a key");
+    run(&mut s, "edit.undo", json!({}));
+    assert_eq!(data(&s).len(), 2, "one step");
+    for bad in [json!({"data": {"vc-x": "1"}}), json!({"data": {"name": "x"}}), json!({"data": {"a b": "1"}}), json!({"data": "pivot"})] {
+        assert!(s.execute("object.setProps", &bad).is_err(), "{bad}");
+    }
+    let svg = run(&mut s, "document.serialize", json!({"format": "svg"}))["text"].as_str().unwrap().to_string();
+    assert!(svg.contains("data-pivot=\"60,100\" data-z=\"3\""), "{svg}");
+    let native = vectorcraft_format::save(&s.doc().unwrap().doc, false);
+    let back = vectorcraft_format::load(&native).unwrap();
+    assert_eq!(back.node(a).unwrap().attrs, s.doc().unwrap().doc.node(a).unwrap().attrs);
+}

crates/engine/src/tests_build.rs

@@ -704,3 +704,67 @@ fn image_trace_object_remembers_its_settings() {
     let id = st.selection.in_paint_order(&st.doc)[0];
     assert!(st.doc.node(id).unwrap().trace.is_none());
 }
+
+/// #569: merging the regions of a rosette of unfilled ellipses (each off the centre, petals
+/// overlapping) merges every region the drags touch into one shape whose outline is only the
+/// merged area's border: no edge between merged regions stays in, as a stray line or a spur.
+#[test]
+fn shape_builder_merges_rosette_rings_cleanly() {
+    let mut s = session();
+    s.execute("paint.setFill", &json!({"none": true})).unwrap();
+    let c = [400.0, 320.0];
+    let mut petals = vec![];
+    for k in 0..8 {
+        let id =
+            s.execute("shape.ellipse", &json!({"x": c[0] - 60.0, "y": c[1] - 172.0, "width": 120, "height": 324})).unwrap()["id"].as_u64().unwrap();
+        s.execute("select.set", &json!({"ids": [id]})).unwrap();
+        s.execute("object.rotate", &json!({"angle": 45.0 * f64::from(k), "origin": c})).unwrap();
+        petals.push(id);
+    }
+    s.execute("select.set", &json!({"ids": petals})).unwrap();
+    // Drags around the ring of petals, from its inside out; the outer ones miss the petals.
+    let mut merged = None;
+    for radius in [110.0, 150.0, 190.0, 230.0] {
+        let pts: Vec<[f64; 2]> = (0..=120)
+            .map(|i| {
+                let a = std::f64::consts::TAU * f64::from(i) / 120.0;
+                [c[0] + radius * a.cos(), c[1] + radius * a.sin()]
+            })
+            .collect();
+        if let Ok(r) = s.execute("shapeBuilder.merge", &json!({"points": pts})) {
+            merged = r["merged"].as_u64().map(NodeId);
+        }
+    }
+    let (ring, rule) = outline(&node(&s, merged.expect("the drags merged")));
+    let inside = |p: kurbo::Point| kurbo::Shape::winding(&ring.to_bezpath(), p) != 0;
+    for k in 0..8 {
+        let a = std::f64::consts::FRAC_PI_4 * f64::from(k) - std::f64::consts::FRAC_PI_2;
+        let tip = kurbo::Point::new(c[0] + 165.0 * a.cos(), c[1] + 165.0 * a.sin());
+        assert!(inside(tip), "petal {k}'s tip at {tip:?} is in the merged shape");
+    }
+    // What is left of the petals stays out of the merged area (a piece left over it is a stray
+    // outline inside it).
+    let merged = merged.unwrap();
+    for id in s.doc().unwrap().selection.objects.clone().into_iter().filter(|id| *id != merged) {
+        let (p, r) = outline(&node(&s, id));
+        let over = vectorcraft_pathops::boolean(&p, r, &ring, rule, vectorcraft_pathops::BoolOp::Intersect);
+        let a = vectorcraft_pathops::area(&over, FillRule::NonZero);
+        assert!(a < 1.0, "{id:?} overlaps the merged shape by {a} pt²");
+    }
+    // No outline is a sliver or carries a spur (2 × area / length: its mean width).
+    for id in s.doc().unwrap().selection.objects.clone() {
+        let (p, r) = outline(&node(&s, id));
+        for sp in &p.subpaths {
+            let one = PathData::new(vec![sp.clone()]);
+            let width = 2.0 * vectorcraft_pathops::area(&one, r) / one.length();
+            assert!(width > 1.0, "{id:?} has an outline {width:.3} pt wide on average, {:.1} pt long", one.length());
+        }
+    }
+    // The ring is one outline around the centre (the regions the drags missed aside): the
+    // petals' tips are no outlines of their own beside it, apart by a hairline.
+    let big = ring.subpaths.iter().filter(|sp| vectorcraft_pathops::area(&PathData::new(vec![(*sp).clone()]), rule) > 100.0).count();
+    assert_eq!(big, 2, "{:?}", ring.subpaths.iter().map(|sp| vectorcraft_pathops::area(&PathData::new(vec![sp.clone()]), rule)).collect::<Vec<_>>());
+    // An inner edge would be a second outline over the merged area: normalising would drop it.
+    let clean = vectorcraft_pathops::normalize(&ring, rule);
+    assert!((ring.length() - clean.length()).abs() < 1.0, "{} pt of outline, {} without inner edges", ring.length(), clean.length());
+}

crates/engine/src/tests_links.rs

@@ -320,7 +320,8 @@ fn a_placed_document_brings_its_links_with_the_files_pixels() {
     let doc_path = dir.file("part.vectorcraft");
     save(&mut s, &doc_path);
     let mut s = session();
-    s.execute("file.place", &json!({"path": doc_path})).unwrap();
+    // As an editable copy (placed linked, it stays one locked object).
+    s.execute("file.place", &json!({"path": doc_path, "link": false})).unwrap();
     let doc = &s.doc().unwrap().doc;
     let mut placed = vec![];
     doc.visit_images(|_, im| placed.push(im.clone()));

crates/engine/src/tests_panelcmds.rs

@@ -248,6 +248,16 @@ fn text_set_format() {
     let NodeKind::Text(t) = node(&s, id).kind else { panic!() };
     assert_eq!(t.first_style().kerning, None);
     assert!(s.execute("text.setFormat", &json!({"ids": [id.0]})).is_err());
+    // Paragraph composer: Every-line by default, undoable.
+    assert_eq!(t.para.composer, vectorcraft_doc::Composer::EveryLine);
+    s.execute("text.setFormat", &json!({"ids": [id.0], "composer": "singleLine"})).unwrap();
+    let NodeKind::Text(t) = node(&s, id).kind else { panic!() };
+    assert_eq!(t.para.composer, vectorcraft_doc::Composer::SingleLine);
+    assert!(s.execute("text.setFormat", &json!({"ids": [id.0], "composer": "best"})).is_err());
+    assert!(s.execute("text.setFormat", &json!({"ids": [id.0], "composer": 1})).is_err());
+    s.execute("edit.undo", &json!({})).unwrap();
+    let NodeKind::Text(t) = node(&s, id).kind else { panic!() };
+    assert_eq!(t.para.composer, vectorcraft_doc::Composer::EveryLine);
 }
 
 #[test]

crates/engine/src/tests_paragraphs.rs

@@ -0,0 +1,207 @@
+//! Paragraph attributes per paragraph: ranged Paragraph panel commands, paragraph styles on one
+//! paragraph, splitting and merging paragraphs while editing, undo and threaded text.
+
+use serde_json::json;
+use vectorcraft_doc::{Justify, NodeId, NodeKind, TextObject};
+use vectorcraft_tools::{Mods, PointerEvent, PointerKind, ToolKey};
+
+use super::*;
+
+fn session() -> Session {
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
+    s
+}
+
+fn area(s: &mut Session, text: &str) -> u64 {
+    s.execute("text.create", &json!({"x": 10, "y": 10, "text": text, "area": {"width": 300, "height": 300}})).unwrap()["id"].as_u64().unwrap()
+}
+
+fn text(s: &Session, id: u64) -> TextObject {
+    match &s.doc().unwrap().doc.node(NodeId(id)).unwrap().kind {
+        NodeKind::Text(t) => (**t).clone(),
+        _ => panic!("not text"),
+    }
+}
+
+fn justs(s: &Session, id: u64) -> Vec<Justify> {
+    text(s, id).paragraph_styles().iter().map(|p| p.justify).collect()
+}
+
+#[test]
+fn ranged_paragraph_commands_touch_only_their_paragraphs() {
+    let mut s = session();
+    let id = area(&mut s, "one\ntwo\nthree");
+    // A caret in "two" (byte 5): only the second paragraph.
+    s.execute("text.setStyle", &json!({"id": id, "justify": "center", "start": 5, "end": 5})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Auto]);
+    // A selection from "one" into "two": both.
+    s.execute("text.setFormat", &json!({"ids": [id], "spaceBefore": 9, "leftIndent": 4, "start": 1, "end": 5})).unwrap();
+    let t = text(&s, id);
+    let sb: Vec<f64> = t.paragraph_styles().iter().map(|p| p.space_before).collect();
+    assert_eq!(sb, [9.0, 9.0, 0.0]);
+    assert_eq!(t.para.left_indent, 4.0, "paragraph 0 is `para`");
+    // Character attributes of setFormat follow the range too.
+    s.execute("text.setFormat", &json!({"ids": [id], "underline": true, "start": 4, "end": 7})).unwrap();
+    let t = text(&s, id);
+    assert!(t.runs.iter().any(|r| r.text == "two" && r.style.underline));
+    assert!(t.runs.iter().any(|r| r.text.starts_with("one") && !r.style.underline));
+    // The layout sees each paragraph's alignment.
+    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
+    assert!(lay.lines[1].x0 > lay.lines[0].x0 + 20.0, "the centred line sits right of the left one");
+    // No range: every paragraph (as before).
+    s.execute("text.setStyle", &json!({"id": id, "justify": "right"})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Right; 3]);
+    // Undo steps back through the ranged edits.
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Auto]);
+    // Tabs per paragraph; a query reads the paragraph at `start`.
+    s.execute("text.tabs.set", &json!({"ids": [id], "stops": [{"position": 40}], "start": 9, "end": 9})).unwrap();
+    assert_eq!(s.execute("text.tabs.get", &json!({"ids": [id], "start": 9})).unwrap()["stops"].as_array().unwrap().len(), 1);
+    assert_eq!(s.execute("text.tabs.get", &json!({"ids": [id]})).unwrap()["stops"], json!([]));
+    // Junk ranges are errors, not panics.
+    assert!(s.execute("text.setFormat", &json!({"ids": [id], "spaceAfter": 1, "start": -3})).is_err());
+    assert!(s.execute("text.setStyle", &json!({"id": id, "justify": "left", "end": "x"})).is_err());
+    s.execute("text.setFormat", &json!({"ids": [id], "spaceAfter": 1, "start": 1_000_000, "end": u64::MAX})).unwrap();
+    assert_eq!(text(&s, id).para_at(2).space_after, 1.0, "past the end: the last paragraph");
+}
+
+#[test]
+fn editing_splits_and_merges_paragraph_styles() {
+    let mut s = session();
+    let id = area(&mut s, "one\ntwo\nthree");
+    s.execute("text.setStyle", &json!({"id": id, "justify": "center", "start": 5, "end": 5})).unwrap();
+    // A break inside "two": both halves keep its style.
+    s.execute("text.editRange", &json!({"id": id, "start": 5, "end": 5, "insert": "\n"})).unwrap();
+    assert_eq!(text(&s, id).plain_text(), "one\nt\nwo\nthree");
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Center, Justify::Auto]);
+    // Deleting the break after "one": the first paragraph's style wins.
+    s.execute("text.editRange", &json!({"id": id, "start": 3, "end": 4})).unwrap();
+    assert_eq!(text(&s, id).plain_text(), "onet\nwo\nthree");
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Auto]);
+    // Pasting styled runs with breaks in "wo": the new paragraphs continue it.
+    let runs = json!([{"text": "A\nB\n", "style": text(&s, id).runs[0].style}]);
+    s.execute("text.editRange", &json!({"id": id, "start": 6, "end": 6, "runs": runs})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Center, Justify::Center, Justify::Auto]);
+    // Undo restores the styles with the text.
+    s.execute("edit.undo", &json!({})).unwrap();
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Center, Justify::Center, Justify::Auto]);
+    // Replacing all the text: every paragraph takes the first one's attributes.
+    s.execute("text.setText", &json!({"ids": [id], "text": "x\ny"})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Auto, Justify::Auto]);
+    assert!(text(&s, id).paras.is_empty());
+}
+
+#[test]
+fn return_in_the_type_tool_continues_the_paragraph_it_splits() {
+    let mut s = session();
+    let v = ViewInfo::default();
+    let id = s.execute("text.create", &json!({"x": 100, "y": 100, "text": "one\ntwo", "size": 20})).unwrap()["id"].as_u64().unwrap();
+    s.execute("text.setStyle", &json!({"id": id, "justify": "right", "start": 0, "end": 0})).unwrap();
+    s.execute("text.setStyle", &json!({"id": id, "justify": "center", "start": 5, "end": 5})).unwrap();
+    s.select_tool("type", v).unwrap();
+    // Click into the first line (right-aligned: it ends at the origin), then End and Return.
+    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &text(&s, id));
+    let l0 = &lay.lines[0];
+    let (x, y) = (100.0 + (l0.x0 + l0.x1) / 2.0, 100.0 + l0.baseline - 5.0);
+    for k in [PointerKind::Down, PointerKind::Up] {
+        s.pointer(&PointerEvent::new(k, x, y), v).unwrap();
+    }
+    s.tool_key(ToolKey::End, Mods::default(), v).unwrap();
+    s.tool_key(ToolKey::Enter, Mods::default(), v).unwrap();
+    s.tool_text("new", v).unwrap();
+    s.tool_key(ToolKey::Escape, Mods::default(), v).unwrap();
+    assert_eq!(text(&s, id).plain_text(), "one\nnew\ntwo");
+    assert_eq!(justs(&s, id), [Justify::Right, Justify::Right, Justify::Center]);
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Right, Justify::Center]);
+}
+
+#[test]
+fn paragraph_style_applies_to_one_paragraph() {
+    let mut s = session();
+    let id = area(&mut s, "Title\nBody text");
+    // The second paragraph keeps new type's attributes, whatever they are.
+    let body = text(&s, id).para_at(1).clone();
+    s.execute("paraStyle.new", &json!({"name": "Head", "attrs": {"justify": "Center", "space_after": 8.0}})).unwrap();
+    s.execute("paraStyle.apply", &json!({"name": "Head", "id": id, "start": 2, "end": 2})).unwrap();
+    let t = text(&s, id);
+    assert_eq!(t.para_at(0).style_name.as_deref(), Some("Head"));
+    assert_eq!((t.para_at(0).justify, t.para_at(0).space_after), (Justify::Center, 8.0));
+    assert_eq!(t.para_at(1), &body, "new type's");
+    let list = s.execute("paraStyle.list", &json!({})).unwrap();
+    assert_eq!(list["styles"][1]["uses"], 1, "one paragraph uses it");
+    assert_eq!(list["styles"][0]["uses"], 1, "the other is Normal");
+    // Redefining updates that paragraph only; renaming follows it.
+    s.execute("paraStyle.setAttrs", &json!({"name": "Head", "attrs": {"justify": "Right"}})).unwrap();
+    assert_eq!(justs(&s, id), [Justify::Right, Justify::Auto]);
+    s.execute("paraStyle.rename", &json!({"name": "Head", "to": "Heading"})).unwrap();
+    assert_eq!(text(&s, id).para_at(0).style_name.as_deref(), Some("Heading"));
+    // New from the selection reads the caret's paragraph.
+    s.execute("paraStyle.new", &json!({"name": "From body", "id": id, "start": 8})).unwrap();
+    let defs = &s.doc().unwrap().doc.para_styles;
+    assert_eq!(defs.iter().find(|d| d.name == "From body").unwrap().attrs["justify"], "Auto");
+}
+
+#[test]
+fn threaded_frames_keep_each_paragraphs_style() {
+    let mut s = session();
+    let story = "The quick brown fox jumps over the lazy dog and keeps running. ".repeat(3) + "\nSecond paragraph.\nThird.";
+    let a =
+        s.execute("text.create", &json!({"x": 10, "y": 10, "text": story, "area": {"width": 150, "height": 60}})).unwrap()["id"].as_u64().unwrap();
+    let b = s.execute("shape.rectangle", &json!({"x": 200, "y": 10, "width": 150, "height": 200})).unwrap()["id"].as_u64().unwrap();
+    s.execute("select.set", &json!({"ids": [a, b]})).unwrap();
+    s.execute("text.thread.create", &json!({})).unwrap();
+    let joined = |s: &Session| format!("{}{}", text(s, a).plain_text(), text(s, b).plain_text());
+    assert_eq!(joined(&s), story);
+    // Centre the second paragraph (in frame b) and right-align the third.
+    let tb = text(&s, b).plain_text();
+    let second = tb.find("Second").unwrap();
+    s.execute("text.setStyle", &json!({"id": b, "justify": "center", "start": second, "end": second})).unwrap();
+    let third = text(&s, b).plain_text().find("Third").unwrap();
+    s.execute("text.setStyle", &json!({"id": b, "justify": "right", "start": third, "end": third})).unwrap();
+    assert_eq!(justs(&s, b), [Justify::Auto, Justify::Center, Justify::Right]);
+    // Typing in the first frame re-flows the story: the styles move with their paragraphs.
+    s.execute("text.editRange", &json!({"id": a, "start": 0, "end": 0, "insert": "More words at the start of the story. "})).unwrap();
+    let (ja, jb) = (justs(&s, a), justs(&s, b));
+    assert_eq!(ja, [Justify::Auto]);
+    assert_eq!(jb, [Justify::Auto, Justify::Center, Justify::Right]);
+    // A break in the first frame makes a new paragraph there; the later ones keep their styles.
+    s.execute("text.editRange", &json!({"id": a, "start": 4, "end": 4, "insert": "\n"})).unwrap();
+    let all: Vec<Justify> = [justs(&s, a), justs(&s, b)].concat();
+    assert_eq!(all.iter().filter(|j| **j == Justify::Center).count(), 1);
+    assert_eq!(all.last(), Some(&Justify::Right));
+    // Restyling the paragraph that continues into frame b (its first) sticks after the re-flow.
+    s.execute("text.setStyle", &json!({"id": b, "justify": "justifyAll", "start": 0, "end": 0})).unwrap();
+    assert_eq!(justs(&s, b)[0], Justify::JustifyAll);
+    assert_eq!(*justs(&s, a).last().unwrap(), Justify::JustifyAll, "the paragraph's part in frame a follows");
+}
+
+/// Upstream's paragraph attributes (direction, mojikumi, leading model) follow a range like the
+/// others: only the touched paragraphs change, and the layout reads each paragraph's own.
+#[test]
+fn ranged_set_format_sets_direction_mojikumi_and_leading_model_per_paragraph() {
+    use vectorcraft_doc::{LeadingModel, Mojikumi, ParaDirection};
+    let mut s = session();
+    let id = area(&mut s, "Hello.\nHello.");
+    // A caret in the second paragraph (byte 9).
+    s.execute(
+        "text.setFormat",
+        &json!({"ids": [id], "direction": "rightToLeft", "leadingModel": "emBoxTop", "mojikumi": "none", "start": 9, "end": 9}),
+    )
+    .unwrap();
+    let t = text(&s, id);
+    let (p0, p1) = (t.para_at(0).clone(), t.para_at(1).clone());
+    assert_eq!((p0.direction, p0.leading_model, p0.mojikumi), (None, LeadingModel::RomanBaseline, Mojikumi::LineEndHalf));
+    assert_eq!((p1.direction, p1.leading_model, p1.mojikumi), (Some(ParaDirection::RightToLeft), LeadingModel::EmBoxTop, Mojikumi::None));
+    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
+    assert!(!lay.lines[0].rtl && lay.lines[1].rtl, "each paragraph's direction");
+    // Return in the right-to-left paragraph continues it.
+    s.execute("text.editRange", &json!({"id": id, "start": 13, "end": 13, "insert": "\nX"})).unwrap();
+    let t = text(&s, id);
+    assert_eq!(t.para_at(2).direction, Some(ParaDirection::RightToLeft));
+    // No range: every paragraph.
+    s.execute("text.setFormat", &json!({"ids": [id], "direction": "auto"})).unwrap();
+    assert!(text(&s, id).paragraph_styles().iter().all(|p| p.direction.is_none()));
+}

crates/engine/src/tests_placed_document.rs

@@ -0,0 +1,481 @@
+//! Placed documents: a VectorCraft document placed linked (`file.place`'s default for one read
+//! from a file), drawn and output as vectors, saved with its preview, checked, updated and
+//! relinked when the file changes, and turned into an editable copy (Break Link, Expand).
+
+use serde_json::{Value, json};
+use vectorcraft_color::{Color, Paint};
+use vectorcraft_doc::{Appearance, Document, Node, NodeKind, PlacedDocument};
+use vectorcraft_geom::{Rect, shapes};
+
+use super::tests_links::{BLUE, Folder, RED, centre_colour, near, open, save, session, write};
+use super::*;
+
+/// A VectorCraft document at `path`: one `w`×`h` artboard filled with `rgb` (and `extra` more
+/// rectangles, which change the file's size).
+fn source(path: &str, w: f64, h: f64, rgb: [u8; 3], extra: usize) {
+    let mut d = Document::new(w, h);
+    let layer = d.layers[0].id;
+    let [r, g, b] = rgb;
+    for i in 0..=extra {
+        let id = d.alloc_id();
+        let look = Appearance::basic(Paint::solid(Color::rgb8(r, g, b)), Paint::None, 0.0);
+        d.insert(Some(layer), i, Node::path(id, shapes::rectangle(Rect::new(0.0, 0.0, w, h)), look)).unwrap();
+    }
+    write(path, &vectorcraft_format::save_file(&d));
+}
+
+/// A document drawing symbol `Star` (a blue 100×50 rectangle) at `path`, titled `title` (tests
+/// that remove the file give it content of its own: files read are cached by content).
+fn star_source(path: &str, title: &str) {
+    let mut d = Document::new(100.0, 50.0);
+    d.title = title.into();
+    let layer = d.layers[0].id;
+    let art = Node::path(vectorcraft_doc::NodeId(900), shapes::rectangle(Rect::new(0.0, 0.0, 100.0, 50.0)), look(BLUE));
+    d.symbols.push(vectorcraft_doc::Symbol { name: "Star".into(), art: std::sync::Arc::new(art) });
+    let id = d.alloc_id();
+    d.insert(Some(layer), 0, Node::new(id, NodeKind::SymbolInstance { symbol: "Star".into(), xf: vectorcraft_geom::Affine::IDENTITY })).unwrap();
+    write(path, &vectorcraft_format::save_file(&d));
+}
+
+fn look(c: [u8; 3]) -> Appearance {
+    Appearance::basic(Paint::solid(Color::rgb8(c[0], c[1], c[2])), Paint::None, 0.0)
+}
+
+/// The active document gets a red symbol named `Star` of its own.
+fn parent_star(s: &mut Session) {
+    let star = Node::path(vectorcraft_doc::NodeId(901), shapes::rectangle(Rect::new(0.0, 0.0, 10.0, 10.0)), look(RED));
+    std::sync::Arc::make_mut(&mut s.doc_mut().unwrap().doc)
+        .symbols
+        .push(vectorcraft_doc::Symbol { name: "Star".into(), art: std::sync::Arc::new(star) });
+}
+
+/// Place `path` (linked: the default), centred on the artboard → its id.
+fn place(s: &mut Session, path: &str) -> NodeId {
+    let r = s.execute("file.place", &json!({"path": path, "at": [200, 150]})).unwrap();
+    assert_eq!(r["linked"], true, "{r}");
+    NodeId(r["ids"][0].as_u64().unwrap())
+}
+
+fn placed(s: &Session, id: NodeId) -> PlacedDocument {
+    match &s.doc().unwrap().doc.node(id).unwrap().kind {
+        NodeKind::PlacedDocument(p) => (**p).clone(),
+        k => panic!("not a placed document: {k:?}"),
+    }
+}
+
+fn bounds(s: &Session, id: NodeId) -> Rect {
+    s.doc().unwrap().doc.node(id).unwrap().geometric_bounds().unwrap()
+}
+
+fn decode(v: &Value) -> Vec<u8> {
+    vectorcraft_format::base64_decode(v["dataBase64"].as_str().unwrap()).unwrap()
+}
+
+/// Images and paths in `bytes`, a PDF, read back.
+fn pdf_contents(bytes: &[u8]) -> (usize, usize) {
+    // The page as drawn (not the VectorCraft document the PDF carries).
+    let (doc, _) = super::cmd::fileio::page_document(bytes, 0, &Default::default()).unwrap();
+    let (mut images, mut paths) = (0, 0);
+    doc.walk(|n| match n.kind {
+        NodeKind::Image(_) => images += 1,
+        NodeKind::Path { .. } | NodeKind::Compound { .. } => paths += 1,
+        _ => {}
+    });
+    (images, paths)
+}
+
+/// The JSON of a `.vectorcraft` file (the data after it left out).
+fn file_json(bytes: &[u8]) -> Value {
+    let end = bytes.windows(vectorcraft_format::BLOB_MAGIC.len()).position(|w| w == vectorcraft_format::BLOB_MAGIC).unwrap_or(bytes.len());
+    serde_json::from_slice(&bytes[..end]).unwrap()
+}
+
+#[test]
+fn a_document_places_linked_by_default_at_its_artboard_size() {
+    let dir = Folder::new("placed-basic");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    let p = placed(&s, id);
+    assert!((p.width - 100.0).abs() < 1e-6 && (p.height - 50.0).abs() < 1e-6, "{p:?}");
+    assert_eq!(bounds(&s, id), Rect::new(150.0, 125.0, 250.0, 175.0));
+    assert_eq!((p.link.path.as_str(), p.link.page), (src.as_str(), Some(1)));
+    let n = s.doc().unwrap().doc.node(id).unwrap();
+    assert_eq!((n.name.as_deref(), n.kind_label()), (Some("logo.vectorcraft"), "Placed Document"));
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    // It moves and scales like any object.
+    s.execute("object.move", &json!({"dx": 10, "dy": 0})).unwrap();
+    assert_eq!(bounds(&s, id), Rect::new(160.0, 125.0, 260.0, 175.0));
+    // Its art's bounds instead of the artboard.
+    let mut d = Document::new(100.0, 50.0);
+    let layer = d.layers[0].id;
+    let id2 = d.alloc_id();
+    d.insert(Some(layer), 0, Node::path(id2, shapes::rectangle(Rect::new(10.0, 10.0, 40.0, 30.0)), look(RED))).unwrap();
+    let small = dir.file("small.vectorcraft");
+    write(&small, &vectorcraft_format::save_file(&d));
+    let r = s.execute("file.place", &json!({"path": small, "crop": "bounding", "at": [200, 150]})).unwrap();
+    let p = placed(&s, NodeId(r["ids"][0].as_u64().unwrap()));
+    assert!(p.bounding && (p.width - 30.0).abs() < 1e-6 && (p.height - 20.0).abs() < 1e-6, "{p:?}");
+}
+
+#[test]
+fn without_link_or_a_file_a_document_places_as_an_editable_copy() {
+    let dir = Folder::new("placed-copy");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let data = vectorcraft_format::base64_encode(&std::fs::read(&src).unwrap());
+    for p in [json!({"path": src, "link": false}), json!({"name": "logo.vectorcraft", "dataBase64": data})] {
+        let r = s.execute("file.place", &p).unwrap();
+        assert_eq!(r["linked"], false, "{r}");
+        let n = s.doc().unwrap().doc.node(NodeId(r["ids"][0].as_u64().unwrap())).unwrap();
+        assert_eq!(n.kind_label(), "Clip Group", "{p}");
+    }
+    assert!(!s.doc().unwrap().doc.has_placed());
+}
+
+#[test]
+fn a_placed_document_is_vectors_in_every_output() {
+    let dir = Folder::new("placed-outputs");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    place(&mut s, &src);
+    let svg = s.execute("document.serialize", &json!({"format": "svg"})).unwrap();
+    let text = svg["text"].as_str().unwrap();
+    assert!(!text.contains("<image") && (text.contains("<path") || text.contains("<rect")), "drawn as paths: {text}");
+    let (images, paths) = pdf_contents(&decode(&s.execute("document.serialize", &json!({"format": "pdf"})).unwrap()));
+    assert_eq!(images, 0, "no image in the PDF");
+    assert!(paths > 0);
+    let png = decode(&s.execute("document.serialize", &json!({"format": "png"})).unwrap());
+    let [r, g, b, _] = image::load_from_memory(&png).unwrap().to_rgba8().get_pixel(200, 150).0;
+    assert!(near([r, g, b], RED), "{:?}", [r, g, b]);
+    for format in ["eps", "emf", "dxf"] {
+        let out = s.execute("document.serialize", &json!({"format": format})).unwrap();
+        assert!(out.to_string().len() > 200, "{format}: {out}");
+    }
+    let info = s.execute("document.info", &json!({})).unwrap();
+    assert!(info.to_string().contains("\"placedDocuments\""), "{info}");
+}
+
+#[test]
+fn the_preview_is_saved_so_the_document_shows_it_without_its_file() {
+    let dir = Folder::new("placed-saved");
+    let src = dir.file("logo.vectorcraft");
+    // Content of its own: files read are cached by content, and this one is removed.
+    source(&src, 100.0, 50.0, RED, 2);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    let doc_path = dir.file("poster/poster.vectorcraft");
+    std::fs::create_dir_all(dir.file("poster")).unwrap();
+    save(&mut s, &doc_path);
+    let saved: Value = serde_json::from_slice(&std::fs::read(&doc_path).unwrap()).unwrap();
+    let kind = &saved["document"]["layers"][0]["kind"]["children"][0]["kind"];
+    assert_eq!(kind["type"], "placeddocument");
+    assert_eq!(kind["link"]["relative"], "../logo.vectorcraft");
+    let key = kind["key"].as_str().unwrap();
+    let entry = &saved["images"][key];
+    assert_eq!((entry["proxy"].as_bool(), entry["mime"].as_str()), (Some(true), Some("image/jpeg")), "the preview, as JPEG (opaque)");
+    // Include Linked Files keeps the file itself.
+    let full = file_json(&decode(&s.execute("document.serialize", &json!({"format": "vectorcraft", "includeLinked": true})).unwrap()));
+    assert_eq!((full["images"][key]["proxy"].clone(), full["images"][key]["mime"].as_str()), (Value::Null, Some("application/json")));
+    std::fs::remove_file(&src).unwrap();
+    let r = open(&mut s, &doc_path);
+    assert_eq!(r["missingLinks"].as_array().map(Vec::len), Some(1), "{r}");
+    assert_eq!(placed(&s, id).link.path, src);
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED), "shown from the saved preview");
+    assert_eq!(s.execute("links.check", &json!({})).unwrap()["missing"], 1);
+    // Output with the file gone: the preview, with a warning.
+    let png = s.execute("document.serialize", &json!({"format": "png"})).unwrap();
+    assert!(png["warnings"].to_string().contains("output as their previews"), "{png}");
+    let [r, g, b, _] = image::load_from_memory(&decode(&png)).unwrap().to_rgba8().get_pixel(200, 150).0;
+    assert!(near([r, g, b], RED), "{:?}", [r, g, b]);
+    // Saved for older apps: the art it shows (here its preview), as plain objects.
+    let old: Value =
+        serde_json::from_slice(&decode(&s.execute("document.serialize", &json!({"format": "vectorcraft", "version": 2})).unwrap())).unwrap();
+    let old = old["document"]["layers"][0]["kind"]["children"][0].to_string();
+    assert!(old.contains("\"image\"") && !old.contains("placeddocument"), "{old}");
+}
+
+#[test]
+fn a_document_saved_with_previews_outputs_its_files_art() {
+    let dir = Folder::new("placed-preview-output");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    let doc_path = dir.file("poster.vectorcraft");
+    save(&mut s, &doc_path);
+    open(&mut s, &doc_path);
+    let key = placed(&s, id).key;
+    assert!(s.doc().unwrap().doc.images[&key].is_proxy(), "opened with the preview only");
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    // Output reads the file again: vectors, no warning.
+    let svg = s.execute("document.serialize", &json!({"format": "svg"})).unwrap();
+    assert_eq!(svg["warnings"], json!([]), "{}", svg["warnings"]);
+    let text = svg["text"].as_str().unwrap();
+    assert!(!text.contains("<image") && (text.contains("<path") || text.contains("<rect")), "vectors");
+    // So does saving with Include Linked Files, and the document stays as it was.
+    let full = file_json(&decode(&s.execute("document.serialize", &json!({"format": "vectorcraft", "includeLinked": true})).unwrap()));
+    assert_eq!(full["images"][&key]["mime"], "application/json");
+    assert!(s.doc().unwrap().doc.images[&key].is_proxy());
+}
+
+#[test]
+fn a_changed_file_is_modified_and_update_links_reads_it_again() {
+    let dir = Folder::new("placed-update");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    s.execute("object.scale", &json!({"sx": 200})).unwrap();
+    let before = bounds(&s, id);
+    let c = s.execute("links.check", &json!({})).unwrap();
+    assert_eq!((c["modified"].as_u64(), c["links"][0]["status"].as_str()), (Some(0), Some("ok")), "{c}");
+    let list = s.execute("links.list", &json!({})).unwrap();
+    let row = &list["links"][0];
+    assert_eq!((row["format"].as_str(), row["document"].as_bool(), row["status"].as_str()), (Some("VectorCraft"), Some(true), Some("ok")), "{row}");
+    // A blue document, wider, and a different file size.
+    source(&src, 200.0, 50.0, BLUE, 1);
+    assert_eq!(s.execute("links.check", &json!({})).unwrap()["links"][0]["status"], "modified");
+    // Until updated, it shows (and outputs) the file as it read it.
+    let svg = s.execute("document.serialize", &json!({"format": "svg"})).unwrap();
+    assert_eq!(svg["warnings"], json!([]));
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    let u = s.execute("links.update", &json!({})).unwrap();
+    assert_eq!(u["updated"], json!([id.0]), "{u}");
+    assert_eq!(placed(&s, id).width, 200.0);
+    assert_eq!(bounds(&s, id), before, "keeps its bounds");
+    assert!(near(centre_colour(&s.doc().unwrap().doc), BLUE));
+    assert_eq!(s.execute("links.check", &json!({})).unwrap()["modified"], 0);
+    // One undo step.
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+}
+
+#[test]
+fn update_links_on_open_reads_a_modified_file_again() {
+    let dir = Folder::new("placed-open");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    place(&mut s, &src);
+    let doc_path = dir.file("poster.vectorcraft");
+    save(&mut s, &doc_path);
+    source(&src, 100.0, 50.0, BLUE, 1);
+    // Ask When Modified (the default): reported, left as it was.
+    let r = open(&mut s, &doc_path);
+    assert_eq!(r["modifiedLinks"].as_array().map(Vec::len), Some(1), "{r}");
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    // Automatically: read again as the document opens.
+    s.execute("prefs.set", &json!({"key": "updateLinks", "value": "automatically"})).unwrap();
+    let r = open(&mut s, &doc_path);
+    assert_eq!(r["updatedLinks"].as_array().map(Vec::len), Some(1), "{r}");
+    assert!(near(centre_colour(&s.doc().unwrap().doc), BLUE));
+}
+
+#[test]
+fn relink_points_a_placed_document_at_another_file() {
+    let dir = Folder::new("placed-relink");
+    let (a, b) = (dir.file("a.vectorcraft"), dir.file("b.vectorcraft"));
+    source(&a, 100.0, 50.0, RED, 0);
+    source(&b, 100.0, 50.0, BLUE, 0);
+    let mut s = session();
+    let id = place(&mut s, &a);
+    let r = s.execute("links.relink", &json!({"ids": [id.0], "path": b})).unwrap();
+    assert_eq!(r["relinked"], json!([id.0]), "{r}");
+    assert_eq!(placed(&s, id).link.path, b);
+    assert!(near(centre_colour(&s.doc().unwrap().doc), BLUE));
+}
+
+#[test]
+fn a_placed_document_inside_a_placed_document_outputs_from_its_own_file() {
+    let dir = Folder::new("placed-nested");
+    let (logo, card) = (dir.file("logo.vectorcraft"), dir.file("card.vectorcraft"));
+    source(&logo, 100.0, 50.0, RED, 0);
+    // The card places the logo, and is saved with the logo's preview only.
+    let mut s = session();
+    place(&mut s, &logo);
+    save(&mut s, &card);
+    s.execute("file.new", &json!({"width": 400, "height": 300})).unwrap();
+    place(&mut s, &card);
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    // The logo inside is read from its file: vectors, not its preview.
+    let svg = s.execute("document.serialize", &json!({"format": "svg"})).unwrap();
+    let text = svg["text"].as_str().unwrap();
+    assert!(!text.contains("<image"), "the logo's file, not its preview: {text}");
+    assert_eq!(pdf_contents(&decode(&s.execute("document.serialize", &json!({"format": "pdf"})).unwrap())).0, 0);
+}
+
+#[test]
+fn documents_that_place_each_other_dont_loop() {
+    let dir = Folder::new("placed-loop");
+    let (a, b) = (dir.file("a.vectorcraft"), dir.file("b.vectorcraft"));
+    source(&a, 100.0, 50.0, RED, 0);
+    // B places A; A then places B.
+    let mut s = session();
+    place(&mut s, &a);
+    save(&mut s, &b);
+    s.execute("document.open", &json!({"path": a})).unwrap();
+    place(&mut s, &b);
+    save(&mut s, &a);
+    s.execute("document.open", &json!({"path": b})).unwrap();
+    let u = s.execute("links.update", &json!({})).unwrap();
+    assert_eq!(u["updated"].as_array().map(Vec::len), Some(1), "{u}");
+    // Drawn and output a few levels deep, then their previews.
+    assert!(near(centre_colour(&s.doc().unwrap().doc), RED));
+    for format in ["svg", "pdf", "png"] {
+        s.execute("document.serialize", &json!({"format": format})).unwrap();
+    }
+}
+
+#[test]
+fn what_cant_be_placed_linked_is_an_error() {
+    let dir = Folder::new("placed-errors");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let place = |s: &mut Session, p: Value| s.execute("file.place", &p).unwrap_err().to_string();
+    let e = place(&mut s, json!({"path": src, "page": 2}));
+    assert!(e.contains("page 2") && e.contains("1 artboard"), "{e}");
+    let e = place(&mut s, json!({"path": src, "crop": "art"}));
+    assert!(e.contains("crop"), "{e}");
+    let empty = dir.file("empty.vectorcraft");
+    write(&empty, &vectorcraft_format::save_file(&Document::new(100.0, 50.0)));
+    let e = place(&mut s, json!({"path": empty, "crop": "bounding"}));
+    assert!(e.contains("no art to place"), "{e}");
+    // Junk params are errors, not crashes.
+    for v in [json!(null), json!(true), json!(-1), json!(1e308), json!("x"), json!([1, 2]), json!({"a": {"b": []}})] {
+        for k in ["link", "page", "crop", "at", "rect"] {
+            let _ = s.execute("file.place", &json!({"path": src, k: v}));
+        }
+    }
+}
+
+#[test]
+fn a_placed_documents_resources_stay_its_own() {
+    let dir = Folder::new("placed-symbols");
+    let src = dir.file("badge.vectorcraft");
+    star_source(&src, "star");
+    let mut s = session();
+    parent_star(&mut s);
+    place(&mut s, &src);
+    assert!(near(centre_colour(&s.doc().unwrap().doc), BLUE), "the file's own Star");
+    let doc = &s.doc().unwrap().doc;
+    assert_eq!(doc.symbols.len(), 1, "nothing joins the document");
+    let prefix = vectorcraft_doc::placed_document::RESOURCE_PREFIX;
+    assert!(doc.images.keys().all(|k| !k.starts_with(prefix)));
+    let svg = s.execute("document.serialize", &json!({"format": "svg"})).unwrap();
+    assert!(!svg["text"].as_str().unwrap().contains("<image"));
+    // Nor its saves.
+    let saved = String::from_utf8(decode(&s.execute("document.serialize", &json!({"format": "vectorcraft"})).unwrap())).unwrap();
+    assert!(!saved.contains(prefix), "{saved}");
+    // Saved for older apps: the art and its resources, as plain objects.
+    let old = vectorcraft_format::load(&decode(&s.execute("document.serialize", &json!({"format": "vectorcraft", "version": 2})).unwrap())).unwrap();
+    assert!(!old.has_placed());
+    assert!(near(centre_colour(&old), BLUE));
+}
+
+#[test]
+fn break_link_gives_the_editable_copy_placing_without_link_gives() {
+    let dir = Folder::new("placed-break");
+    let src = dir.file("badge.vectorcraft");
+    star_source(&src, "break");
+    let mut s = session();
+    parent_star(&mut s);
+    // The copy placing without Link gives.
+    let r = s.execute("file.place", &json!({"path": src, "link": false, "at": [200, 150]})).unwrap();
+    let copy = s.doc().unwrap().doc.node(NodeId(r["ids"][0].as_u64().unwrap())).unwrap().clone();
+    s.execute("edit.undo", &json!({})).unwrap();
+    let id = place(&mut s, &src);
+    let r = s.execute("links.embed", &json!({"ids": [id.0]})).unwrap();
+    assert_eq!(r["embedded"], json!([id.0]), "{r}");
+    let doc = &s.doc().unwrap().doc;
+    let n = doc.node(id).unwrap();
+    assert!(!doc.has_placed() && n.kind_label() == "Clip Group", "{}", n.kind_label());
+    assert_eq!((n.name.as_deref(), n.geometric_bounds()), (copy.name.as_deref(), copy.geometric_bounds()));
+    let kinds = |n: &Node| {
+        let mut k = vec![];
+        n.walk(&mut |c| k.push(c.kind_label()));
+        k
+    };
+    assert_eq!(kinds(n), kinds(&copy));
+    assert!(near(centre_colour(doc), BLUE), "the art as it showed");
+    let names: Vec<&str> = doc.symbols.iter().map(|s| s.name.as_str()).collect();
+    assert_eq!(names.len(), 2, "the file's Star joined, renamed: {names:?}");
+    assert_eq!(s.execute("links.list", &json!({})).unwrap()["links"], json!([]));
+    assert_eq!(s.doc().unwrap().history.undo.last().unwrap().label, "Embed");
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert!(s.doc().unwrap().doc.has_placed());
+    // A file that can't be read stays linked.
+    std::fs::remove_file(&src).unwrap();
+    let doc_path = dir.file("poster.vectorcraft");
+    save(&mut s, &doc_path);
+    open(&mut s, &doc_path);
+    let r = s.execute("links.embed", &json!({"ids": [id.0]})).unwrap();
+    assert_eq!((r["embedded"].clone(), r["missing"].clone()), (json!([]), json!([id.0])), "{r}");
+}
+
+#[test]
+fn expand_turns_a_placed_document_into_editable_art_with_its_resources() {
+    let dir = Folder::new("placed-expand");
+    let src = dir.file("badge.vectorcraft");
+    star_source(&src, "star");
+    let mut s = session();
+    parent_star(&mut s);
+    let id = place(&mut s, &src);
+    s.execute("object.scale", &json!({"sx": 200})).unwrap();
+    let before = bounds(&s, id);
+    s.execute("object.expand", &json!({})).unwrap();
+    let doc = &s.doc().unwrap().doc;
+    let n = doc.node(id).unwrap();
+    assert!(n.is_container() && !doc.has_placed(), "{:?}", n.kind_label());
+    let after = n.geometric_bounds().unwrap();
+    assert!((after.width() - before.width()).abs() < 0.5 && (after.height() - before.height()).abs() < 0.5, "{after:?} vs {before:?}");
+    assert!(near(centre_colour(doc), BLUE));
+    let saved = vectorcraft_format::save_file(doc);
+    assert!(near(centre_colour(&vectorcraft_format::load(&saved).unwrap()), BLUE), "saved with its resources");
+    let info = s.execute("object.expand.info", &json!({})).unwrap();
+    assert_eq!(info["object"], false, "nothing left to expand: {info}");
+}
+
+#[test]
+fn saving_a_document_refreshes_the_open_documents_that_place_it() {
+    let dir = Folder::new("placed-refresh");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    let parent = s.active_index().unwrap();
+    // Open the file, recolour it and save it.
+    s.execute("document.open", &json!({"path": src})).unwrap();
+    s.execute("select.all", &json!({})).unwrap();
+    s.execute("paint.setFill", &json!({"color": "#1414e6"})).unwrap();
+    s.execute("document.save", &json!({})).unwrap();
+    let child = s.active_index().unwrap();
+    assert_ne!(parent, child);
+    let doc = &s.documents()[parent];
+    assert_eq!(doc.history.undo.last().unwrap().label, "Update Links");
+    assert!(near(centre_colour(&doc.doc), BLUE), "shows the saved version");
+    assert!(matches!(doc.doc.node(id).map(|n| &n.kind), Some(NodeKind::PlacedDocument(_))));
+    assert_eq!(s.active_index(), Some(child), "the saved document stays active");
+}
+
+#[test]
+fn link_info_gives_the_artboards_size_not_pixels() {
+    let dir = Folder::new("placed-info");
+    let src = dir.file("logo.vectorcraft");
+    source(&src, 100.0, 50.0, RED, 0);
+    let mut s = session();
+    let id = place(&mut s, &src);
+    s.execute("object.scale", &json!({"sx": 200})).unwrap();
+    let i = s.execute("links.info", &json!({"id": id.0})).unwrap();
+    assert_eq!((i["pageWidth"].as_f64(), i["pageHeight"].as_f64(), i["document"].as_bool()), (Some(100.0), Some(50.0), Some(true)), "{i}");
+    assert!(i.get("pixelWidth").is_none() && i.get("ppi").is_none(), "no pixels: {i}");
+    assert_eq!(
+        (i["status"].as_str(), i["fileName"].as_str(), i["scale"].clone()),
+        (Some("ok"), Some("logo.vectorcraft"), json!([200.0, 200.0])),
+        "{i}"
+    );
+}

crates/engine/src/tests_shaper.rs

@@ -0,0 +1,347 @@
+use super::*;
+use serde_json::json;
+use vectorcraft_doc::shaper::{FILL_PREFIX, SOURCES, STROKE_PREFIX};
+use vectorcraft_doc::{LiveShape, Node, NodeKind};
+use vectorcraft_geom::{Point, Shape as _};
+use vectorcraft_tools::{Mods, PointerEvent, PointerKind};
+
+fn session() -> Session {
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 500, "height": 500})).unwrap();
+    s
+}
+fn rectangle(s: &mut Session, x: f64, fill: &str) -> NodeId {
+    s.execute("paint.setFill", &json!({"color": fill, "ids": []})).unwrap();
+    let id = s.execute("shape.rectangle", &json!({"x":x,"y":0,"width":100,"height":100})).unwrap()["id"].as_u64().unwrap();
+    NodeId(id)
+}
+fn scribble(s: &mut Session, pts: &[[f64; 2]]) -> NodeId {
+    NodeId(s.execute("shaper.scribble", &json!({"points":pts})).unwrap()["id"].as_u64().unwrap())
+}
+fn node(s: &Session, id: NodeId) -> &Node {
+    s.doc().unwrap().doc.node(id).unwrap()
+}
+fn fill(s: &Session, id: NodeId, x: f64, y: f64) -> Option<String> {
+    node(s, id)
+        .children()
+        .unwrap()
+        .iter()
+        .filter(|n| n.name.as_deref() != Some(SOURCES))
+        .rev()
+        .find(|n| {
+            n.name.as_deref().is_some_and(|n| n.starts_with(FILL_PREFIX))
+                && n.path_data().is_some_and(|p| p.to_bezpath().winding(Point::new(x, y)) != 0)
+        })
+        .map(|n| n.appearance.fill_paint().label())
+}
+fn stroke(s: &Session, id: NodeId, x: f64, y: f64) -> bool {
+    node(s, id).children().unwrap().iter().filter(|n| n.name.as_deref() != Some(SOURCES)).any(|n| {
+        n.name.as_deref().is_some_and(|n| n.starts_with(STROKE_PREFIX))
+            && !n.appearance.stroke_paint().is_none()
+            && n.path_data().and_then(|p| p.nearest(Point::new(x, y))).is_some_and(|(_, _, _, _, d)| d < 0.1)
+    })
+}
+
+#[test]
+fn shaper_merges_with_origin_color_keeps_live_originals_and_undoes_once() {
+    for reverse in [false, true] {
+        let mut s = session();
+        let a = rectangle(&mut s, 0.0, "#ff0000");
+        let b = rectangle(&mut s, 50.0, "#0000ff");
+        let originals = [node(&s, a).clone(), node(&s, b).clone()];
+        let undo = s.doc().unwrap().history.undo.len();
+        let mut pts = vec![[25.0, 20.0], [75.0, 35.0], [30.0, 50.0], [125.0, 65.0], [75.0, 80.0], [125.0, 85.0]];
+        if reverse {
+            pts.reverse();
+        }
+        let g = scribble(&mut s, &pts);
+        let color = if reverse { "#0000ff" } else { "#ff0000" };
+        for x in [25.0, 75.0, 125.0] {
+            assert_eq!(fill(&s, g, x, 50.0).as_deref(), Some(color));
+        }
+        for n in &originals {
+            assert_eq!(node(&s, n.id), n);
+        }
+        assert_eq!(node(&s, g).children().unwrap()[0].name.as_deref(), Some(SOURCES));
+        assert!(!stroke(&s, g, 50.0, 50.0));
+        assert!(stroke(&s, g, 0.0, 50.0));
+        assert_eq!(s.doc().unwrap().history.undo.len(), undo + 1);
+        s.execute("edit.undo", &json!({})).unwrap();
+        assert!(s.doc().unwrap().doc.node(g).is_none());
+        for n in &originals {
+            assert_eq!(node(&s, n.id), n);
+        }
+        s.execute("edit.redo", &json!({})).unwrap();
+        assert_eq!(fill(&s, g, 75.0, 50.0).as_deref(), Some(color));
+    }
+}
+
+#[test]
+fn shaper_interior_punch_removes_the_whole_visible_front_face() {
+    let mut s = session();
+    let a = rectangle(&mut s, 0.0, "#ff0000");
+    let b = rectangle(&mut s, 50.0, "#0000ff");
+    let originals = [node(&s, a).clone(), node(&s, b).clone()];
+    let g = scribble(&mut s, &[[65.0, 20.0], [85.0, 40.0], [65.0, 60.0], [85.0, 80.0]]);
+    assert_eq!(fill(&s, g, 75.0, 50.0), None);
+    assert_eq!(fill(&s, g, 25.0, 50.0).as_deref(), Some("#ff0000"));
+    assert_eq!(fill(&s, g, 125.0, 50.0), None);
+    assert!(stroke(&s, g, 50.0, 50.0) && stroke(&s, g, 150.0, 50.0));
+    for n in &originals {
+        assert_eq!(node(&s, n.id), n);
+    }
+}
+
+#[test]
+fn shaper_exiting_scribble_erases_only_touched_fill_and_boundary_strokes() {
+    let mut s = session();
+    rectangle(&mut s, 0.0, "#ff0000");
+    rectangle(&mut s, 50.0, "#0000ff");
+    let g = scribble(&mut s, &[[110.0, 20.0], [140.0, 35.0], [110.0, 50.0], [140.0, 65.0], [200.0, 70.0]]);
+    assert_eq!(fill(&s, g, 125.0, 50.0), None);
+    assert!(!stroke(&s, g, 150.0, 50.0));
+    assert_eq!(fill(&s, g, 25.0, 50.0).as_deref(), Some("#ff0000"));
+    assert_eq!(fill(&s, g, 75.0, 50.0), None);
+    assert!(stroke(&s, g, 0.0, 50.0));
+}
+
+#[test]
+fn shaper_erases_only_protruding_stroke_pieces_keeps_fill_and_original_line() {
+    let mut s = session();
+    s.execute("paint.setFill", &json!({"color":"#ffff00"})).unwrap();
+    let circle = NodeId(s.execute("shape.ellipse", &json!({"x":100,"y":100,"width":100,"height":100})).unwrap()["id"].as_u64().unwrap());
+    let line = NodeId(s.execute("shape.line", &json!({"x1":50,"y1":150,"x2":250,"y2":150})).unwrap()["id"].as_u64().unwrap());
+    let original_line = node(&s, line).clone();
+    let g = scribble(&mut s, &[[60.0, 140.0], [70.0, 160.0], [80.0, 140.0], [90.0, 160.0]]);
+    assert!(!stroke(&s, g, 75.0, 150.0));
+    assert!(stroke(&s, g, 150.0, 150.0));
+    assert!(stroke(&s, g, 225.0, 150.0));
+    assert_eq!(fill(&s, g, 150.0, 130.0).as_deref(), Some("#ffff00"));
+    assert_eq!(node(&s, line), &original_line);
+    assert!(matches!(node(&s, circle).kind, NodeKind::Path { live: Some(LiveShape::Ellipse { .. }), .. }));
+    let g = scribble(&mut s, &[[210.0, 140.0], [220.0, 160.0], [230.0, 140.0], [240.0, 160.0]]);
+    assert!(!stroke(&s, g, 225.0, 150.0));
+    assert!(stroke(&s, g, 150.0, 150.0));
+    assert_eq!(node(&s, line), &original_line);
+}
+
+#[test]
+fn shaper_source_move_resize_native_roundtrip_and_release_preserve_live_art() {
+    let mut s = session();
+    let a = rectangle(&mut s, 0.0, "#ff0000");
+    let b = rectangle(&mut s, 50.0, "#0000ff");
+    let g = scribble(&mut s, &[[25.0, 20.0], [75.0, 35.0], [30.0, 50.0], [125.0, 65.0]]);
+    s.execute("object.move", &json!({"ids":[a.0],"dx":20,"dy":10})).unwrap();
+    assert_eq!(fill(&s, g, 30.0, 15.0).as_deref(), Some("#ff0000"));
+    assert_eq!(node(&s, a).geometric_bounds().unwrap().x0, 20.0);
+    s.execute("select.set", &json!({"ids":[a.0]})).unwrap();
+    s.execute("object.setBounds", &json!({"width":120.0,"height":110.0,"reference":0})).unwrap();
+    assert!(matches!(node(&s, a).kind, NodeKind::Path { live: Some(LiveShape::Rectangle { .. }), .. }));
+    let doc = &s.doc().unwrap().doc;
+    let back = vectorcraft_format::load(&vectorcraft_format::save(doc, false)).unwrap();
+    assert_eq!(back.layers, doc.layers);
+    let originals = [node(&s, a).clone(), node(&s, b).clone()];
+    s.execute("shaper.release", &json!({"id":g.0})).unwrap();
+    assert!(s.doc().unwrap().doc.node(g).is_none());
+    for n in &originals {
+        assert_eq!(node(&s, n.id), n);
+    }
+}
+
+#[test]
+fn shaper_face_paint_survives_source_edits_and_expand_discards_only_sources() {
+    let mut s = session();
+    let a = rectangle(&mut s, 0.0, "#ff0000");
+    rectangle(&mut s, 50.0, "#0000ff");
+    let g = scribble(&mut s, &[[25.0, 20.0], [75.0, 35.0], [30.0, 50.0], [125.0, 65.0]]);
+    s.execute("shaper.select", &json!({"point":[75,50]})).unwrap();
+    s.execute("paint.setFill", &json!({"color":"#00ff00"})).unwrap();
+    s.execute("object.move", &json!({"ids":[a.0],"dx":5,"dy":0})).unwrap();
+    assert_eq!(fill(&s, g, 75.0, 50.0).as_deref(), Some("#00ff00"));
+    s.execute("shaper.expand", &json!({"id":g.0})).unwrap();
+    assert!(node(&s, g).shaper.is_none());
+    assert!(s.doc().unwrap().doc.node(a).is_none());
+    assert_eq!(fill(&s, g, 75.0, 50.0).as_deref(), Some("#00ff00"));
+}
+
+#[test]
+fn shaper_double_click_selects_an_original_for_construction_editing() {
+    let mut s = session();
+    let a = rectangle(&mut s, 0.0, "#ff0000");
+    rectangle(&mut s, 50.0, "#0000ff");
+    let g = scribble(&mut s, &[[25.0, 20.0], [75.0, 35.0], [30.0, 50.0], [125.0, 65.0]]);
+    let v = ViewInfo { smart_guides: false, ..Default::default() };
+    s.select_tool("shaper", v).unwrap();
+    let requests = s.pointer(&PointerEvent::new(PointerKind::DoubleClick, 25.0, 50.0), v).unwrap();
+    assert!(requests.iter().any(|r| matches!(r, UiRequest::SwitchTool(tool) if tool == "selection")));
+    s.select_tool("selection", v).unwrap();
+    assert_eq!(s.tool_id(), "selection");
+    assert_eq!(s.doc().unwrap().selection.objects, vec![a]);
+    assert_eq!(s.doc().unwrap().isolation, Some(node(&s, g).children().unwrap()[0].id));
+    assert!(s.doc().unwrap().doc.is_editable(a));
+    s.execute("object.move", &json!({"dx":10,"dy":0})).unwrap();
+    assert_eq!(fill(&s, g, 15.0, 50.0).as_deref(), Some("#ff0000"));
+    s.execute("object.exitIsolation", &json!({})).unwrap();
+    assert_eq!(s.doc().unwrap().selection.objects, vec![g]);
+}
+
+#[test]
+fn shaper_lines_keep_free_angles_with_or_without_shift() {
+    for shift in [false, true] {
+        let mut s = session();
+        let v = ViewInfo { smart_guides: false, ..Default::default() };
+        s.select_tool("shaper", v).unwrap();
+        for (kind, x, y) in [(PointerKind::Down, 30.0, 40.0), (PointerKind::Drag, 130.0, 70.0), (PointerKind::Up, 230.0, 100.0)] {
+            s.pointer(&PointerEvent::new(kind, x, y).with_mods(Mods { shift, ..Default::default() }), v).unwrap();
+        }
+        let n = node(&s, s.doc().unwrap().selection.objects[0]);
+        assert!(matches!(n.kind,NodeKind::Path{live:Some(LiveShape::Line{a,b}),..} if a==Point::new(30.0,40.0) && b==Point::new(230.0,100.0)));
+    }
+}
+
+#[test]
+fn shaper_rejects_oversized_or_invalid_gestures_without_changing_art() {
+    let mut s = session();
+    rectangle(&mut s, 0.0, "#ff0000");
+    let before = s.doc().unwrap().doc.clone();
+    let history = s.doc().unwrap().history.undo.len();
+    for params in [json!({"points":vec![[1.0,1.0];4097]}), json!({"points":[[1,1],[2,2]],"tolerance":0}), json!({"points":[[1e100,0]]})] {
+        assert!(s.execute("shaper.scribble", &params).is_err());
+        assert_eq!(s.doc().unwrap().doc.layers, before.layers);
+        assert_eq!(s.doc().unwrap().history.undo.len(), history);
+    }
+}
+
+#[test]
+fn shaper_tool_trims_both_diagonal_ends_and_only_construction_can_pick_them() {
+    use vectorcraft_doc::hit::{HitOptions, hit_test};
+    let mut s = session();
+    s.execute("paint.setFill", &json!({"color":"#ffff00"})).unwrap();
+    s.execute("shape.ellipse", &json!({"x":100,"y":100,"width":100,"height":100})).unwrap();
+    let rotate = |x: f64, y: f64| {
+        let (x, y) = (x - 150.0, y - 150.0);
+        Point::new(150.0 + (x + y) / 2.0f64.sqrt(), 150.0 + (y - x) / 2.0f64.sqrt())
+    };
+    let (a, b) = (rotate(50.0, 150.0), rotate(250.0, 150.0));
+    let line = NodeId(s.execute("shape.line", &json!({"x1":a.x,"y1":a.y,"x2":b.x,"y2":b.y})).unwrap()["id"].as_u64().unwrap());
+    let original = node(&s, line).clone();
+    let v = ViewInfo { smart_guides: false, ..Default::default() };
+    s.select_tool("shaper", v).unwrap();
+    for offset in [0.0, 150.0] {
+        let points = [(60.0, 140.0), (70.0, 160.0), (80.0, 140.0), (90.0, 160.0)];
+        for (i, (x, y)) in points.into_iter().enumerate() {
+            let p = rotate(x + offset, y);
+            let kind = if i == 0 {
+                PointerKind::Down
+            } else if i == 3 {
+                PointerKind::Up
+            } else {
+                PointerKind::Drag
+            };
+            s.pointer(&PointerEvent::new(kind, p.x, p.y), v).unwrap();
+        }
+    }
+    let g = s.doc().unwrap().selection.objects[0];
+    assert!(node(&s, g).shaper.is_some());
+    assert_eq!(node(&s, line), &original);
+    assert!(stroke(&s, g, 150.0, 150.0));
+    assert_eq!(fill(&s, g, 150.0, 130.0).as_deref(), Some("#ffff00"));
+    let sources = node(&s, g).children().unwrap()[0].id;
+    let doc = &s.doc().unwrap().doc;
+    for x in [75.0, 225.0] {
+        let p = rotate(x, 150.0);
+        assert!(!stroke(&s, g, p.x, p.y));
+        assert!(!node(&s, g).geometric_bounds().unwrap().contains(p));
+        assert!(!node(&s, g).visual_bounds().unwrap().contains(p));
+        assert!(hit_test(doc, p, HitOptions { tol: 0.5, ..Default::default() }).is_none());
+        assert_eq!(hit_test(doc, p, HitOptions { tol: 0.5, scope: Some(sources), ..Default::default() }).unwrap().leaf, line);
+    }
+    let p = rotate(75.0, 150.0);
+    s.execute("shaper.select", &json!({"point":[p.x,p.y],"source":true})).unwrap();
+    assert_eq!(s.doc().unwrap().selection.objects, vec![line]);
+}
+
+#[test]
+fn shaper_three_circles_erase_a_visible_fill_and_keep_the_complete_shared_curve() {
+    for exits in [false, true] {
+        let mut s = session();
+        let mut originals = vec![];
+        for (x, y, fill) in [(100.0, 20.0, "#ff0000"), (20.0, 130.0, "#ffffff"), (170.0, 130.0, "#ffff00")] {
+            s.execute("paint.setFill", &json!({"color":fill,"ids":[]})).unwrap();
+            let id = NodeId(s.execute("shape.ellipse", &json!({"x":x,"y":y,"width":200,"height":200})).unwrap()["id"].as_u64().unwrap());
+            originals.push(node(&s, id).clone());
+        }
+        let mut points = vec![[290.0, 210.0], [330.0, 225.0], [290.0, 240.0], [330.0, 255.0]];
+        if exits {
+            points.push([410.0, 260.0]);
+        }
+        let g = scribble(&mut s, &points);
+        for (x, y) in [(330.0, 230.0), (190.0, 230.0), (250.0, 180.0)] {
+            assert_eq!(fill(&s, g, x, y), None, "all of the visible yellow face is erased, including covered intersections");
+        }
+        assert_eq!(stroke(&s, g, 370.0, 230.0), !exits);
+        for angle in [145.0_f64, 160.0, 180.0, 200.0, 220.0, 240.0, 260.0, 280.0] {
+            let (sin, cos) = angle.to_radians().sin_cos();
+            assert!(stroke(&s, g, 270.0 + 100.0 * cos, 230.0 + 100.0 * sin), "shared curve remains complete at {angle}°, exiting {exits}");
+        }
+        if exits {
+            // The two new corners must be actual path joins, rather than meeting butt caps.
+            for corner in [Point::new(298.975, 134.288), Point::new(195.0, 296.144)] {
+                assert!(
+                    node(&s, g)
+                        .children()
+                        .unwrap()
+                        .iter()
+                        .filter(|n| n.name.as_deref().is_some_and(|s| s.starts_with(STROKE_PREFIX)))
+                        .flat_map(|n| n.path_data().unwrap().subpaths.iter())
+                        .flat_map(|sp| &sp.anchors)
+                        .any(|a| a.p.distance(corner) < 0.1 && a.has_in() && a.has_out()),
+                    "joined corner at {corner:?}"
+                );
+            }
+        }
+        assert_eq!(fill(&s, g, 110.0, 230.0).as_deref(), Some("#ffffff"));
+        assert_eq!(fill(&s, g, 200.0, 80.0).as_deref(), Some("#ff0000"));
+        for n in originals {
+            assert_eq!(node(&s, n.id), &n);
+        }
+    }
+}
+
+#[test]
+fn shaper_visible_dividing_stroke_keeps_fill_erasure_on_one_side() {
+    let mut s = session();
+    s.execute("paint.setFill", &json!({"color":"#ffff00","ids":[]})).unwrap();
+    s.execute("shape.ellipse", &json!({"x":100,"y":100,"width":100,"height":100})).unwrap();
+    s.execute("shape.line", &json!({"x1":100,"y1":150,"x2":200,"y2":150})).unwrap();
+    let g = scribble(&mut s, &[[140.0, 125.0], [160.0, 135.0], [140.0, 140.0], [160.0, 145.0]]);
+    assert_eq!(fill(&s, g, 150.0, 130.0), None);
+    assert_eq!(fill(&s, g, 150.0, 170.0).as_deref(), Some("#ffff00"));
+    assert!(stroke(&s, g, 150.0, 150.0));
+}
+
+#[test]
+fn shaper_joined_outline_keeps_its_stroke_paint_after_source_edits() {
+    let mut s = session();
+    let mut ids = vec![];
+    for (x, color) in [(0, "#ff0000"), (50, "#ffff00")] {
+        s.execute("paint.setFill", &json!({"color":color,"ids":[]})).unwrap();
+        ids.push(NodeId(s.execute("shape.ellipse", &json!({"x":x,"y":0,"width":100,"height":100})).unwrap()["id"].as_u64().unwrap()));
+    }
+    let g = scribble(&mut s, &[[20.0, 40.0], [70.0, 45.0], [30.0, 50.0], [125.0, 55.0], [75.0, 60.0], [125.0, 65.0]]);
+    let outlines: Vec<_> =
+        node(&s, g).children().unwrap().iter().filter(|n| n.name.as_deref().is_some_and(|s| s.starts_with(STROKE_PREFIX))).collect();
+    assert_eq!(outlines.len(), 1);
+    assert!(outlines[0].path_data().unwrap().subpaths[0].closed);
+    let outline = outlines[0].id;
+    s.execute("paint.setStroke", &json!({"color":"#00ff00","ids":[outline.0]})).unwrap();
+    s.execute("object.move", &json!({"ids":[ids[0].0],"dx":10,"dy":0})).unwrap();
+    let outlines: Vec<_> =
+        node(&s, g).children().unwrap().iter().filter(|n| n.name.as_deref().is_some_and(|s| s.starts_with(STROKE_PREFIX))).collect();
+    assert_eq!(outlines.len(), 1);
+    assert_eq!(outlines[0].appearance.stroke_paint().label(), "#00ff00");
+    assert!(outlines[0].path_data().unwrap().subpaths[0].closed);
+    for id in ids {
+        assert_ne!(node(&s, id).appearance.stroke_paint().label(), "#00ff00");
+    }
+}

crates/engine/src/tests_typearea.rs

@@ -339,3 +339,38 @@ fn the_type_widget_converts_point_and_area_type() {
     s.execute("edit.undo", &json!({})).unwrap();
     assert_eq!(text(&s, id), before);
 }
+
+#[test]
+fn area_type_options_align_the_lines_vertically() {
+    use vectorcraft_doc::VerticalAlign;
+    let mut s = session();
+    let id = area(&mut s, 40.0, 40.0, 200.0, 300.0, "Short story");
+    sel(&mut s, &[id]);
+    assert_eq!(s.execute("text.areaOptions", &json!({})).unwrap()["verticalAlign"], "top");
+    let top = layout(&s, id).lines[0].baseline;
+    let before = text(&s, id).cached_bounds;
+    let n = undo_len(&s);
+    let r = s.execute("text.areaOptions", &json!({"verticalAlign": "bottom"})).unwrap();
+    assert_eq!(r["verticalAlign"], "bottom");
+    assert_eq!(text(&s, id).area.vertical_align, VerticalAlign::Bottom);
+    let l = layout(&s, id);
+    let last = l.lines.last().unwrap();
+    assert!((last.baseline + last.descent - 300.0).abs() < 1e-6);
+    assert!(l.lines[0].baseline > top + 200.0);
+    assert_ne!(text(&s, id).cached_bounds, before, "the cached bounds follow the text");
+    assert_eq!((undo_len(&s), last_step(&s).as_str()), (n + 1, "Area Type Options"));
+    s.execute("text.areaOptions", &json!({"verticalAlign": "center"})).unwrap();
+    assert_eq!(text(&s, id).area.vertical_align, VerticalAlign::Center);
+    // Unknown values are refused and change nothing.
+    for bad in [json!({"verticalAlign": "middle"}), json!({"verticalAlign": 3}), json!({"verticalAlign": null})] {
+        assert!(s.execute("text.areaOptions", &bad).is_err(), "{bad}");
+    }
+    assert_eq!(undo_len(&s), n + 2);
+    assert_eq!(text(&s, id).area.vertical_align, VerticalAlign::Center);
+    s.execute("edit.undo", &json!({})).unwrap();
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!(text(&s, id).area.vertical_align, VerticalAlign::Top);
+    assert_eq!(layout(&s, id).lines[0].baseline, top);
+    assert_eq!(text(&s, id).cached_bounds, before);
+    assert!(cmd::find_command("text.areaOptions").unwrap().params.contains("verticalAlign?: top|center|bottom|justify"));
+}

crates/engine/src/tooling.rs

@@ -205,6 +205,7 @@ impl Session {
             slices_locked: self.menu.slices_locked,
             auto_add_delete: !self.prefs.disable_auto_add_delete,
             selection_tolerance: self.prefs.selection_tolerance,
+            anchor_size: self.prefs.anchor_size,
             path_only: self.prefs.object_selection_by_path_only,
             type_path_only: self.prefs.type_selection_by_path_only,
             double_click_isolate: self.prefs.double_click_to_isolate,

crates/engine/tests/command_sweep.rs

@@ -274,6 +274,15 @@ fn structured_junk() {
         ("text.create", json!({"x": 0, "y": 0, "text": "\u{0}\u{FFFF}\u{1F600}", "size": -1})),
         ("text.create", json!({"x": 0, "y": 0, "text": "a", "size": 1e308, "area": {"width": -1, "height": 0}})),
         ("text.setStyle", json!({"size": 0, "leading": -1, "tracking": 1e308})),
+        ("text.setStyle", json!({"justify": "center", "start": u64::MAX, "end": 0})),
+        ("text.setStyle", json!({"justify": "right", "start": -1, "end": "x"})),
+        ("text.setFormat", json!({"spaceBefore": 1e308, "leftIndent": -1e308, "start": 3, "end": u64::MAX})),
+        ("text.setFormat", json!({"hyphenate": true, "underline": true, "start": 1.5, "end": null})),
+        ("text.setFormat", json!({"ids": [u64::MAX, 2], "firstLineIndent": 5, "start": 0, "end": 0})),
+        ("text.tabs.set", json!({"stops": [{"position": 10}], "start": u64::MAX, "end": u64::MAX})),
+        ("text.tabs.get", json!({"start": -5})),
+        ("paraStyle.apply", json!({"name": "[Normal Paragraph Style]", "id": 2, "start": u64::MAX, "end": 1})),
+        ("paraStyle.new", json!({"id": 2, "start": u64::MAX})),
         ("document.setUnits", json!({"units": "Parsecs"})),
         ("document.open", json!({"name": "x.svg", "dataBase64": "!!!"})),
         ("document.open", json!({"name": "x.svg", "dataBase64": "PHN2Zz4="})),
@@ -311,6 +320,54 @@ fn structured_junk() {
     assert!(failures.is_empty(), "{} failures:\n{}", failures.len(), failures.join("\n"));
 }
 
+/// Area Type Options with junk fit values, on selected area type (the fixtures have none), with
+/// text that overflows: never a panic, the document stays sound, and editing still works.
+#[test]
+fn area_options_fit_junk() {
+    let cases = [
+        json!({"fit": "shrinkText", "fitMinPercent": 1e308}),
+        json!({"fit": "shrinkText", "fitMinPercent": -1e308}),
+        json!({"fit": "shrinkText", "fitMinPercent": "x"}),
+        json!({"fit": {"shrinkText": {"minPercent": -5}}}),
+        json!({"fit": {"shrinkText": {"minPercent": "a"}}}),
+        json!({"fit": {"shrinkText": null}}),
+        json!({"fit": {"autoHeight": 1}}),
+        json!({"fit": {"bogus": {}}}),
+        json!({"fit": [1, 2]}),
+        json!({"fit": ""}),
+        json!({"fit": "AUTO-HEIGHT", "height": 1e308, "width": -1e308}),
+        json!({"fit": "autoHeight", "columns": u64::MAX, "gutter": 1e308, "inset": 1e308}),
+        json!({"fit": "autoHeight", "rows": 5, "inset": -1}),
+        json!({"fit": "shrinkText", "columns": 100, "gutter": 0, "inset": 10000}),
+        json!({"fitMinPercent": 50}),
+        json!({"fit": "none", "fitMinPercent": 1e-308}),
+    ];
+    let story = "Words that overflow a small frame. ".repeat(40);
+    let mut failures = vec![];
+    for (size, (w, h)) in [(12.0, (120.0, 40.0)), (0.1, (1.0, 1.0)), (1296.0, (100_000.0, 1.0))] {
+        for p in &cases {
+            let mut s = Fixture::Multi.session();
+            let made = s.execute("text.create", &json!({"x": 10, "y": 10, "size": size, "text": story, "area": {"width": w, "height": h}}));
+            let Ok(made) = made else { continue };
+            let id = made["id"].as_u64().unwrap_or(0);
+            let r = catch_quiet(|| s.execute("text.areaOptions", p));
+            match r {
+                Err(m) => failures.push(format!("PANIC text.areaOptions {p} [{size} pt, {w}×{h}]: {m}")),
+                Ok(_) => {
+                    let typed = catch_quiet(|| s.execute("text.editRange", &json!({"id": id, "start": 0, "insert": "More words. "})));
+                    if typed.is_err() {
+                        failures.push(format!("PANIC typing after text.areaOptions {p}"));
+                    }
+                    if let Err(e) = check_session(&s) {
+                        failures.push(format!("text.areaOptions {p} [{size} pt]: {e}"));
+                    }
+                }
+            }
+        }
+    }
+    assert!(failures.is_empty(), "{} failures:\n{}", failures.len(), failures.join("\n"));
+}
+
 /// After a successful fuzzed call, the document still round-trips and exports.
 #[test]
 fn fuzzed_calls_keep_documents_serializable() {

crates/eps/src/scene.rs

@@ -291,7 +291,7 @@ impl<'a> Scene<'a> {
                 }
             }
             // Live blends, envelopes, meshes and repeats are written as their evaluated art.
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 let g = vectorcraft_effects::expand_live_deep(Some(self.doc), n);
                 for c in g.children().into_iter().flatten() {
                     self.node(c, false);

crates/format/src/lib.rs

@@ -23,7 +23,10 @@
 //! Versions: v1 wrote anchors as `{p: {x, y}, in: {x, y}, out: {x, y}, kind}`; v2 as
 //! `{p: [x, y], in?, out?, kind?}` with default-valued fields left out; v3 keeps the assigned colour
 //! profiles in `document.color_profiles` (before: `document.unknown.colorProfiles`) and may be
-//! compressed. Every version loads, and [`save_with`] writes any of them for older apps (under the
+//! compressed; v4 may keep large data (images, placed documents, the PDF, profiles of at least
+//! [`INLINE_MAX`] bytes) after the JSON instead of in it: the JSON is followed by [`BLOB_MAGIC`] and
+//! the bytes, and such an entry says where they are (`"blob": [offset, length]`) instead of giving
+//! `data`. Every version loads, and [`save_with`] writes any of them for older apps (under the
 //! format name `drawcraft`, which every version reads). Readers reject files whose `version` is
 //! newer than they support.
 #![forbid(unsafe_code)]
@@ -42,8 +45,12 @@ use vectorcraft_doc::{Document, ImageBlob};
 #[cfg(not(target_arch = "wasm32"))]
 pub use atomic::{write_atomic, write_atomic_with};
 
-/// v3: colour profiles as a document field, optional compression and preview (v1 and v2 files still load).
-pub const VERSION: u32 = 3;
+/// v4: large data after the JSON (v1 to v3 files still load).
+pub const VERSION: u32 = 4;
+/// Data this large or larger goes after the JSON (v4), not into it as base64.
+pub const INLINE_MAX: usize = 8 << 10;
+/// What separates the JSON from the data after it (v4).
+pub const BLOB_MAGIC: &[u8] = b"\n\0VCBLOBS\0";
 /// The oldest version [`save_with`] writes.
 pub const MIN_VERSION: u32 = 1;
 /// The first version whose readers open compressed files.
@@ -87,12 +94,69 @@ pub enum FormatError {
 #[derive(Serialize, Deserialize)]
 struct Image {
     mime: String,
+    /// The bytes as base64, unless they come after the JSON (`blob`).
+    #[serde(default, skip_serializing_if = "String::is_empty")]
     data: String,
+    /// Where the bytes are in the data after the JSON (v4): `[offset, length]`.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    blob: Option<[u64; 2]>,
     /// `data` is a linked image's preview ([`ImageBlob::proxy`]), not the file's bytes.
     #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     proxy: bool,
 }
 
+impl Image {
+    /// Its bytes: the base64 `data`, or its part of `tail` (the data after the JSON).
+    fn bytes(&self, tail: &[u8]) -> Option<Vec<u8>> {
+        match self.blob {
+            Some([offset, len]) => {
+                let start = usize::try_from(offset).ok()?;
+                let end = start.checked_add(usize::try_from(len).ok()?)?;
+                tail.get(start..end).map(<[u8]>::to_vec)
+            }
+            None => base64_decode(&self.data),
+        }
+    }
+}
+
+/// Entries written for one file: large bytes go to the data after the JSON when the version keeps
+/// them there.
+struct Blobs {
+    tail: Vec<u8>,
+    outside: bool,
+}
+
+impl Blobs {
+    fn image(&mut self, mime: &str, bytes: &[u8], proxy: bool) -> Image {
+        if self.outside && bytes.len() >= INLINE_MAX {
+            let at = self.tail.len() as u64;
+            self.tail.extend_from_slice(bytes);
+            return Image { mime: mime.into(), data: String::new(), blob: Some([at, bytes.len() as u64]), proxy };
+        }
+        Image { mime: mime.into(), data: base64_encode(bytes), blob: None, proxy }
+    }
+}
+
+/// The MIME type of a preview's bytes (JPEG or PNG).
+fn preview_mime(bytes: &[u8]) -> &'static str {
+    if bytes.starts_with(&[0xff, 0xd8]) { "image/jpeg" } else { vectorcraft_doc::links::PROXY_MIME }
+}
+
+/// The JSON of a file and the data after it (v4), split at [`BLOB_MAGIC`] after the first JSON
+/// value.
+fn split_tail(text: &[u8]) -> (&[u8], &[u8]) {
+    let mut values = serde_json::Deserializer::from_slice(text).into_iter::<serde::de::IgnoredAny>();
+    if values.next().is_some_and(|v| v.is_ok()) {
+        let end = values.byte_offset();
+        if let Some(rest) = text.get(end..)
+            && rest.starts_with(BLOB_MAGIC)
+        {
+            return (text.get(..end).unwrap_or(text), rest.get(BLOB_MAGIC.len()..).unwrap_or_default());
+        }
+    }
+    (text, &[])
+}
+
 #[derive(Deserialize)]
 struct File {
     format: String,
@@ -173,6 +237,14 @@ pub fn save_with(doc: &Document, o: &SaveOptions) -> Result<Vec<u8>, FormatError
     o.check()?;
     let pretty = o.pretty && !o.compress;
     let mut d = doc.without_edit_modes().into_owned();
+    // Older apps don't know placed documents: they get the art the objects show, with its
+    // resources. Otherwise resources only exporting adds are never saved.
+    if o.version < VERSION && d.has_placed() {
+        d = d.with_placed_art().into_owned();
+        d.placed_as_groups();
+    } else {
+        d.drop_placed_resources();
+    }
     let linked = d.linked_only_images();
     // The blobs go in the file's `images` (only those the document uses).
     let blobs = std::mem::take(&mut d.images);
@@ -189,6 +261,7 @@ pub fn save_with(doc: &Document, o: &SaveOptions) -> Result<Vec<u8>, FormatError
     // Images are only referenced by image objects' `key` (wherever the objects are: layers,
     // symbols, patterns, masks, or foreign data).
     let used = if blobs.is_empty() { HashSet::new() } else { string_members(&body, "key") };
+    let mut out_blobs = Blobs { tail: vec![], outside: o.version >= 4 };
     let images: BTreeMap<&str, Image> = blobs
         .iter()
         .filter(|(k, _)| used.contains(k.as_str()))
@@ -196,20 +269,20 @@ pub fn save_with(doc: &Document, o: &SaveOptions) -> Result<Vec<u8>, FormatError
             // Include Linked Files keeps the file's bytes whenever they are loaded.
             let preview_only = linked.contains(k) && (!o.include_linked || b.is_proxy());
             let image = match b.proxy.as_ref().filter(|_| preview_only) {
-                Some(p) => Image { mime: vectorcraft_doc::links::PROXY_MIME.into(), data: base64_encode(p), proxy: true },
-                None => Image { mime: b.mime.clone(), data: base64_encode(&b.bytes), proxy: false },
+                Some(p) => out_blobs.image(preview_mime(p), p, true),
+                None => out_blobs.image(&b.mime, &b.bytes, false),
             };
             (k.as_str(), image)
         })
         .collect();
-    let blob = |mime: &str, bytes: &[u8]| Image { mime: mime.into(), data: base64_encode(bytes), proxy: false };
-    let profiles: BTreeMap<&str, Image> = o.profiles.iter().map(|(name, icc)| (name.as_str(), blob(ICC_MIME, icc))).collect();
-    let pdf = o.pdf.as_deref().map(|p| blob("application/pdf", p));
+    let profiles: BTreeMap<&str, Image> = o.profiles.iter().map(|(name, icc)| (name.as_str(), out_blobs.image(ICC_MIME, icc, false))).collect();
+    let pdf = o.pdf.as_deref().map(|p| out_blobs.image("application/pdf", p, false));
+    let blob = |mime: &str, bytes: &[u8]| Image { mime: mime.into(), data: base64_encode(bytes), blob: None, proxy: false };
     let carried = profiles.values().chain(&pdf).map(|i| i.data.len()).sum::<usize>();
     let size = body.len() + images.values().map(|i| i.data.len()).sum::<usize>() + carried + 256;
     let mut w = Envelope { out: Vec::with_capacity(size), pretty };
     // Older apps only know the name from before the rename.
-    w.field("format", &if o.version < VERSION { LEGACY_EXTENSION } else { EXTENSION })?;
+    w.field("format", &if o.version < 3 { LEGACY_EXTENSION } else { EXTENSION })?;
     w.field("version", &o.version)?;
     w.field("generator", &format!("VectorCraft {}", env!("CARGO_PKG_VERSION")))?;
     if let Some(png) = &o.preview {
@@ -223,7 +296,11 @@ pub fn save_with(doc: &Document, o: &SaveOptions) -> Result<Vec<u8>, FormatError
     }
     w.raw("document", &body);
     w.field("images", &images)?;
-    let out = w.finish();
+    let mut out = w.finish();
+    if !out_blobs.tail.is_empty() {
+        out.extend_from_slice(BLOB_MAGIC);
+        out.extend_from_slice(&out_blobs.tail);
+    }
     if !o.compress {
         return Ok(out);
     }
@@ -356,7 +433,8 @@ pub fn load_info(bytes: &[u8]) -> Result<(Document, FileInfo), FormatError> {
 /// [`load`], with everything else the file carries.
 pub fn load_file(bytes: &[u8]) -> Result<NativeFile, FormatError> {
     let text = unpack(bytes)?;
-    let f: File = serde_json::from_slice(&text).map_err(|e| FormatError::NotVectorcraft(e.to_string()))?;
+    let (json, tail) = split_tail(&text);
+    let f: File = serde_json::from_slice(json).map_err(|e| FormatError::NotVectorcraft(e.to_string()))?;
     if f.format != EXTENSION && f.format != LEGACY_EXTENSION {
         return Err(FormatError::NotVectorcraft(format!("format is `{}`", f.format)));
     }
@@ -365,7 +443,7 @@ pub fn load_file(bytes: &[u8]) -> Result<NativeFile, FormatError> {
     }
     let mut doc = f.document;
     for (k, img) in f.images {
-        let bytes = base64_decode(&img.data).ok_or_else(|| FormatError::BadImage(k.clone()))?;
+        let bytes = img.bytes(tail).ok_or_else(|| FormatError::BadImage(k.clone()))?;
         let mut blob = ImageBlob::new(img.mime, bytes);
         // Until the linked file is read, the preview stands in for it.
         if img.proxy {
@@ -382,7 +460,7 @@ pub fn load_file(bytes: &[u8]) -> Result<NativeFile, FormatError> {
     doc.fix_next_id();
     // Untrusted: capped, named and pointing at objects the file has.
     doc.tidy_saved_selections();
-    let profiles = f.profiles.into_iter().filter_map(|(name, icc)| Some((name, base64_decode(&icc.data)?))).collect();
+    let profiles = f.profiles.into_iter().filter_map(|(name, icc)| Some((name, icc.bytes(tail)?))).collect();
     Ok(NativeFile { doc, info: FileInfo { version: f.version, legacy: f.format == LEGACY_EXTENSION }, profiles })
 }
 
@@ -393,19 +471,24 @@ struct Head {
     pdf: Option<Image>,
 }
 
-fn head(bytes: &[u8]) -> Option<Head> {
-    serde_json::from_slice(&unpack(bytes).ok()?).ok()
+/// The file's head and the data after its JSON.
+fn head(bytes: &[u8]) -> Option<(Head, Vec<u8>)> {
+    let text = unpack(bytes).ok()?;
+    let (json, tail) = split_tail(&text);
+    Some((serde_json::from_slice(json).ok()?, tail.to_vec()))
 }
 
 /// The preview PNG embedded in a native file (`None`: it has none, or isn't a native file).
 pub fn preview(bytes: &[u8]) -> Option<Vec<u8>> {
-    base64_decode(&head(bytes)?.preview?.data)
+    let (h, tail) = head(bytes)?;
+    h.preview?.bytes(&tail)
 }
 
 /// The PDF a native file saved with Create PDF-Compatible File carries (`None`: it has none, or
 /// isn't a native file).
 pub fn pdf_content(bytes: &[u8]) -> Option<Vec<u8>> {
-    base64_decode(&head(bytes)?.pdf?.data)
+    let (h, tail) = head(bytes)?;
+    h.pdf?.bytes(&tail)
 }
 
 /// Does this look like a `.vectorcraft` file (compressed or not)?

crates/format/tests/native_v3.rs

@@ -7,7 +7,7 @@ use std::io::Write as _;
 use std::sync::Arc;
 
 use serde_json::{Value, json};
-use vectorcraft_doc::{ColorProfiles, Document, ImageBlob, ImageObject, Node, NodeKind, OpacityMask, Symbol};
+use vectorcraft_doc::{ColorProfiles, Composer, Document, ImageBlob, ImageObject, Node, NodeKind, OpacityMask, Symbol};
 use vectorcraft_format::{FormatError, SaveOptions, VERSION, is_compressed, load, preview, save, save_with, sniff};
 use vectorcraft_geom::Affine;
 use vectorcraft_testkit::fixtures;
@@ -43,6 +43,46 @@ fn opts(version: u32, compress: bool) -> SaveOptions {
     SaveOptions { version, compress, ..SaveOptions::default() }
 }
 
+#[test]
+fn area_type_vertical_alignment_round_trips() {
+    let d = rich_doc();
+    let text = String::from_utf8(save(&d, false)).unwrap();
+    assert!(text.contains("\"verticalAlign\":\"center\""), "the fixture's area type is centred");
+    let back = load(text.as_bytes()).unwrap();
+    assert_eq!(doc_json(&back), doc_json(&d));
+    let area = |d: &Document| {
+        let mut found = None;
+        d.walk(|n| {
+            // The fixture's centred area type, by its text (the fixture has other area type).
+            if let NodeKind::Text(t) = &n.kind
+                && matches!(t.kind, vectorcraft_doc::TextKind::Area { .. })
+                && t.runs.iter().map(|r| r.text.as_str()).collect::<String>() == "Centred area type"
+            {
+                found = Some(t.area.vertical_align);
+            }
+        });
+        found.unwrap()
+    };
+    assert_eq!(area(&back), vectorcraft_doc::VerticalAlign::Center);
+    // Files from before the option open top-aligned.
+    // (Every area type the fixture has writes its options, so the key goes from all of them.)
+    fn strip(v: &mut Value) {
+        match v {
+            Value::Object(m) => {
+                m.remove("verticalAlign");
+                m.values_mut().for_each(strip);
+            }
+            Value::Array(a) => a.iter_mut().for_each(strip),
+            _ => {}
+        }
+    }
+    let mut v = json_of(text.as_bytes());
+    strip(&mut v);
+    let old = serde_json::to_string(&v).unwrap();
+    assert!(!old.contains("verticalAlign"));
+    assert_eq!(area(&load(old.as_bytes()).unwrap()), vectorcraft_doc::VerticalAlign::Top);
+}
+
 #[test]
 fn compressed_files_load() {
     let d = rich_doc();
@@ -55,7 +95,7 @@ fn compressed_files_load() {
     assert!(!flate2_unpack(&packed).contains(&b'\n'));
     // A legacy (v2, pre-rename) file compressed by hand opens too.
     let text = String::from_utf8(plain.clone()).unwrap();
-    let legacy = text.replacen("\"format\":\"vectorcraft\",\"version\":3", "\"format\":\"drawcraft\",\"version\":2", 1);
+    let legacy = text.replacen(&format!("\"format\":\"vectorcraft\",\"version\":{VERSION}"), "\"format\":\"drawcraft\",\"version\":2", 1);
     assert_ne!(legacy, text);
     let legacy = gzip(legacy.as_bytes());
     assert!(sniff(&legacy));
@@ -111,6 +151,43 @@ fn keys_from_newer_versions_round_trip() {
     check_native_roundtrip(&d).unwrap();
 }
 
+/// The paragraph composer is saved only when it isn't the default (Every-line) and reads back.
+#[test]
+fn text_composer_round_trips() {
+    let d = rich_doc();
+    let composers = |d: &Document| {
+        let mut v = vec![];
+        d.walk(|n| {
+            if let NodeKind::Text(t) = &n.kind {
+                v.push(t.para.composer);
+            }
+        });
+        v
+    };
+    // The point type set to Single-line comes first; the fixture's other type keeps the default.
+    let single_then_default = |c: &[Composer]| c.len() > 1 && c[0] == Composer::SingleLine && c[1..].iter().all(|c| *c == Composer::EveryLine);
+    assert!(single_then_default(&composers(&d)), "{:?}", composers(&d));
+    let bytes = save(&d, false);
+    assert!(String::from_utf8_lossy(&bytes).contains("\"composer\":\"singleLine\""));
+    assert_eq!(composers(&load(&bytes).unwrap()), composers(&d));
+    // Files without the key (older files, Every-line text) read as Every-line.
+    fn strip(v: &mut Value) {
+        match v {
+            Value::Object(m) => {
+                m.remove("composer");
+                m.values_mut().for_each(strip);
+            }
+            Value::Array(a) => a.iter_mut().for_each(strip),
+            _ => {}
+        }
+    }
+    let mut v = json_of(&bytes);
+    strip(&mut v);
+    let d2 = load(&serde_json::to_vec(&v).unwrap()).unwrap();
+    assert!(composers(&d2).iter().all(|c| *c == Composer::EveryLine), "{:?}", composers(&d2));
+    assert!(!String::from_utf8_lossy(&save(&d2, false)).contains("composer"));
+}
+
 /// A document as the first version wrote it (format name `drawcraft`, anchors as maps).
 const V1_FILE: &str = r#"{"format":"drawcraft","version":1,"generator":"DrawCraft 0.1.0","document":{"version":1,"title":"Old","artboards":[{"id":1,"name":"Artboard 1","rect":{"x0":0.0,"y0":0.0,"x1":100.0,"y1":80.0}}],
 "layers":[{"id":1,"name":"Layer 1","visible":true,"locked":false,"opacity":1.0,"kind":{"type":"layer","children":[

crates/format/tests/native_v4.rs

@@ -0,0 +1,78 @@
+//! `.vectorcraft` v4: large data after the JSON (images, the PDF, profiles), small files still plain
+//! JSON, older versions inline, damaged offsets refused.
+// Integration tests: unwrapping and panicking on failure is fine here, unlike in shipped code (AGENTS.md › Robustness).
+#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+
+use std::sync::Arc;
+
+use serde_json::Value;
+use vectorcraft_doc::{Document, ImageBlob, ImageObject, Node, NodeKind};
+use vectorcraft_format::{BLOB_MAGIC, FormatError, INLINE_MAX, SaveOptions, load, load_file, pdf_content, save_with};
+use vectorcraft_geom::Affine;
+
+/// A document showing image `key` of `len` bytes.
+fn doc_with_image(key: &str, len: usize) -> Document {
+    let mut d = Document::new(100.0, 100.0);
+    let bytes: Vec<u8> = (0..len).map(|i| (i * 7 % 251) as u8).collect();
+    d.images.insert(key.into(), ImageBlob::new("image/png", bytes));
+    let l = d.layers[0].id;
+    let id = d.alloc_id();
+    let im = ImageObject { key: key.into(), width: 10, height: 10, xf: Affine::IDENTITY, link: None, placement: Default::default() };
+    d.insert(Some(l), 0, Node::new(id, NodeKind::Image(im))).unwrap();
+    d
+}
+
+fn has_tail(bytes: &[u8]) -> bool {
+    bytes.windows(BLOB_MAGIC.len()).any(|w| w == BLOB_MAGIC)
+}
+
+#[test]
+fn large_data_goes_after_the_json_and_reads_back() {
+    let d = doc_with_image("big", INLINE_MAX + 10);
+    let pdf = vec![b'%'; INLINE_MAX * 2];
+    for compress in [false, true] {
+        let o = SaveOptions { compress, pdf: Some(pdf.clone()), ..SaveOptions::default() };
+        let bytes = save_with(&d, &o).unwrap();
+        if !compress {
+            assert!(has_tail(&bytes), "a binary section");
+            // The JSON before it holds no base64 copy of the image.
+            assert!(bytes.len() < INLINE_MAX + 10 + pdf.len() + (32 << 10), "{} bytes", bytes.len());
+        }
+        let back = load(&bytes).unwrap();
+        assert_eq!(back.images["big"].bytes, d.images["big"].bytes, "compress {compress}");
+        assert_eq!(pdf_content(&bytes).unwrap(), pdf);
+    }
+}
+
+#[test]
+fn small_files_stay_plain_json_and_older_versions_inline() {
+    let small = save_with(&doc_with_image("small", 100), &SaveOptions::default()).unwrap();
+    assert!(!has_tail(&small));
+    let v: Value = serde_json::from_slice(&small).unwrap();
+    assert_eq!(v["version"], 4);
+    let big = doc_with_image("big", INLINE_MAX + 10);
+    let v3 = save_with(&big, &SaveOptions { version: 3, ..SaveOptions::default() }).unwrap();
+    assert!(!has_tail(&v3), "version 3 keeps everything in the JSON");
+    let v: Value = serde_json::from_slice(&v3).unwrap();
+    assert_eq!((v["format"].as_str(), v["version"].as_u64()), (Some("vectorcraft"), Some(3)));
+    assert_eq!(load(&v3).unwrap().images["big"].bytes, big.images["big"].bytes);
+}
+
+#[test]
+fn damaged_offsets_are_refused_not_a_crash() {
+    let d = doc_with_image("big", INLINE_MAX + 10);
+    let bytes = save_with(&d, &SaveOptions::default()).unwrap();
+    // The data cut short.
+    let cut = &bytes[..bytes.len() - 100];
+    assert!(matches!(load_file(cut), Err(FormatError::BadImage(_))));
+    // An offset past the end.
+    let text = String::from_utf8_lossy(&bytes);
+    let at = text.find("\"blob\":[").unwrap();
+    let mut damaged = bytes.clone();
+    damaged.splice(at..at + 8, b"\"blob\":[9".iter().copied());
+    assert!(load_file(&damaged).is_err());
+    // A missing section.
+    let json_only = &bytes[..bytes.windows(BLOB_MAGIC.len()).position(|w| w == BLOB_MAGIC).unwrap()];
+    assert!(load_file(json_only).is_err());
+    let _ = Arc::new(());
+}

crates/geom/src/recognize.rs

@@ -1,11 +1,11 @@
 //! Shape recognition for the Shaper tool: a rough freehand stroke becomes a clean shape.
 //!
 //! The stroke is classified by how closed it is, how many corners survive a coarse polyline
-//! simplification (Douglas–Peucker at a fraction of the stroke's size) and how well it fills its
-//! bounding box. A zig-zag stroke with several reversals is a scribble (the Shaper deletes what it
-//! covers).
+//! simplification independent of where drawing began, its edge/angle fit and how well it fills
+//! its bounding box. Samples are spaced by distance so pointer speed does not bias the fit.
+//! A zig-zag stroke with several reversals is a scribble (the Shaper deletes what it covers).
 
-use crate::{Point, Rect, Vec2};
+use crate::{Affine, Point, Rect, Vec2};
 
 /// What the Shaper recognised.
 #[derive(Clone, Debug, PartialEq)]
@@ -14,10 +14,16 @@ pub enum Recognized {
         a: Point,
         b: Point,
     },
-    /// Axis-aligned rectangle (squares snap when the sides are within 10%).
-    Rectangle(Rect),
-    /// Axis-aligned ellipse in `rect` (circles snap when the axes are within 10%).
-    Ellipse(Rect),
+    /// Rectangle at a 45° step (squares snap when the sides are within 10%).
+    Rectangle {
+        rect: Rect,
+        rotation: f64,
+    },
+    /// Ellipse at a 45° step (circles snap when the axes are within 10%).
+    Ellipse {
+        rect: Rect,
+        rotation: f64,
+    },
     /// Regular polygon (triangle, pentagon, hexagon…): centre, radius, side count and the rotation
     /// (degrees) of the first vertex from straight up.
     Polygon {
@@ -48,30 +54,174 @@ fn dist_to_segment(p: Point, a: Point, b: Point) -> f64 {
     p.distance(a + ab * t)
 }
 
-/// Douglas–Peucker simplification.
+/// Douglas–Peucker simplification with bounded stack use, even for noisy strokes.
 fn simplify(pts: &[Point], tol: f64) -> Vec<Point> {
     if pts.len() < 3 {
         return pts.to_vec();
     }
-    let (a, b) = (pts[0], pts[pts.len() - 1]);
-    let (i, d) = pts[1..pts.len() - 1]
-        .iter()
-        .enumerate()
-        .map(|(i, p)| (i + 1, dist_to_segment(*p, a, b)))
-        .fold((0, 0.0), |m, x| if x.1 > m.1 { x } else { m });
-    if d <= tol {
-        return vec![a, b];
+    let mut keep = vec![false; pts.len()];
+    if let Some(first) = keep.first_mut() {
+        *first = true;
     }
-    let mut left = simplify(&pts[..=i], tol);
-    let right = simplify(&pts[i..], tol);
-    left.pop();
-    left.extend(right);
-    left
+    if let Some(last) = keep.last_mut() {
+        *last = true;
+    }
+    let mut pending = vec![(0, pts.len() - 1)];
+    while let Some((start, end)) = pending.pop() {
+        let Some(window) = pts.get(start..=end) else { continue };
+        let (Some(&a), Some(&b)) = (window.first(), window.last()) else { continue };
+        let (offset, deviation) = window
+            .iter()
+            .enumerate()
+            .skip(1)
+            .take(window.len().saturating_sub(2))
+            .map(|(i, p)| (i, dist_to_segment(*p, a, b)))
+            .fold((0, 0.0), |best, candidate| if candidate.1 > best.1 { candidate } else { best });
+        if deviation > tol {
+            let split = start + offset;
+            if let Some(k) = keep.get_mut(split) {
+                *k = true;
+            }
+            if split > start + 1 {
+                pending.push((start, split));
+            }
+            if end > split + 1 {
+                pending.push((split, end));
+            }
+        }
+    }
+    pts.iter().zip(keep).filter_map(|(p, keep)| keep.then_some(*p)).collect()
+}
+
+/// Sample by distance, so pointer speed/density cannot bias the shape fit. Bounds and length
+/// still come from the complete stroke, but simplification works on at most 256 samples.
+fn resample(pts: &[Point], length: f64) -> Vec<Point> {
+    const SAMPLES: usize = 256;
+    let (Some(&first), Some(&last)) = (pts.first(), pts.last()) else { return Vec::new() };
+    let mut out = vec![first];
+    let mut walked = 0.0;
+    for (&a, &b) in pts.iter().zip(pts.iter().skip(1)) {
+        let segment = a.distance(b);
+        if segment <= 0.0 {
+            continue;
+        }
+        while out.len() < SAMPLES - 1 {
+            let target = length * (out.len() as f64 / (SAMPLES - 1) as f64);
+            if target > walked + segment {
+                break;
+            }
+            out.push(a + (b - a) * ((target - walked) / segment).clamp(0.0, 1.0));
+        }
+        walked += segment;
+    }
+    out.push(last);
+    out
+}
+
+/// A closed stroke has no special starting corner. Split at distant points and simplify both
+/// halves, then discard collinear seam points instead of counting them as polygon vertices.
+fn closed_corners(pts: &[Point], tol: f64) -> Vec<Point> {
+    let Some(&first) = pts.first() else { return Vec::new() };
+    let start = pts.iter().enumerate().max_by(|(_, a), (_, b)| a.distance(first).total_cmp(&b.distance(first))).map_or(0, |(i, _)| i);
+    let ring: Vec<Point> = pts.iter().skip(start).chain(pts.iter().take(start)).copied().collect();
+    let Some(&first) = ring.first() else { return Vec::new() };
+    let split = ring.iter().enumerate().max_by(|(_, a), (_, b)| a.distance(first).total_cmp(&b.distance(first))).map_or(0, |(i, _)| i);
+    let (Some(left), Some(right)) = (ring.get(..=split), ring.get(split..)) else { return Vec::new() };
+    let mut corners = simplify(left, tol);
+    corners.pop();
+    let other: Vec<Point> = right.iter().copied().chain(std::iter::once(first)).collect();
+    let mut other = simplify(&other, tol);
+    other.pop();
+    corners.extend(other);
+    while corners.len() > 3 {
+        let n = corners.len();
+        let redundant = corners.iter().enumerate().find_map(|(i, p)| {
+            let (&a, &b) = (corners.get((i + n - 1) % n)?, corners.get((i + 1) % n)?);
+            (dist_to_segment(*p, a, b) <= tol).then_some(i)
+        });
+        let Some(i) = redundant else { break };
+        corners.remove(i);
+    }
+    corners
 }
 
 fn area(poly: &[Point]) -> f64 {
-    let n = poly.len();
-    (0..n).map(|i| poly[i].to_vec2().cross(poly[(i + 1) % n].to_vec2())).sum::<f64>().abs() / 2.0
+    let Some(&origin) = poly.first() else { return 0.0 };
+    // Translating to the first point avoids cancellation far from the document origin.
+    poly.iter().zip(poly.iter().skip(1)).map(|(&a, &b)| (a - origin).cross(b - origin)).sum::<f64>().abs() / 2.0
+}
+
+/// Four substantial, approximately perpendicular edges, even with uneven sides and corners.
+fn is_rectangle(pts: &[Point], corners: &[Point], size: f64) -> bool {
+    if corners.len() != 4 || !is_polygonal(pts, corners, size, 0.055) {
+        return false;
+    }
+    right_angles(corners, size)
+}
+
+fn right_angles(corners: &[Point], size: f64) -> bool {
+    let around: Vec<Point> = corners.iter().cycle().take(corners.len() + 2).copied().collect();
+    around.windows(3).all(|w| {
+        let [a, b, c] = w else { return false };
+        let (u, v) = (*b - *a, *c - *b);
+        let (lu, lv) = (u.hypot(), v.hypot());
+        lu > 0.03 * size && lv > 0.03 * size && (u.dot(v) / (lu * lv)).abs() < 0.45
+    })
+}
+
+/// Fit all vertices, so neither the starting point nor drawing direction picks the orientation.
+fn polygon_rotation(corners: &[Point], step: f64) -> f64 {
+    let Some(&origin) = corners.first() else { return 0.0 };
+    let n = corners.len() as f64;
+    let center = origin + corners.iter().fold(Vec2::ZERO, |sum, p| sum + (*p - origin) / n);
+    let period = 360.0 / n;
+    let error = |rotation: f64| {
+        corners
+            .iter()
+            .map(|p| {
+                let angle = (*p - center).atan2().to_degrees() + 90.0;
+                let delta = (angle - rotation).rem_euclid(period);
+                delta.min(period - delta).powi(2)
+            })
+            .sum::<f64>()
+    };
+    [0.0, 90.0, 180.0, 270.0].into_iter().filter(|r| r % step == 0.0).min_by(|a, b| error(*a).total_cmp(&error(*b))).unwrap_or(0.0)
+}
+
+fn rectangle_rotation(corners: &[Point]) -> f64 {
+    let (sin, cos) = corners.iter().zip(corners.iter().cycle().skip(1)).fold((0.0, 0.0), |(sin, cos), (&a, &b)| {
+        let angle = (b - a).atan2() * 4.0;
+        (sin + angle.sin(), cos + angle.cos())
+    });
+    (sin.atan2(cos).to_degrees() / 4.0 / 45.0).round().mul_add(45.0, 0.0).rem_euclid(180.0)
+}
+
+fn ellipse_rotation(pts: &[Point]) -> f64 {
+    let Some(&origin) = pts.first() else { return 0.0 };
+    let n = pts.len() as f64;
+    let center = origin + pts.iter().fold(Vec2::ZERO, |sum, p| sum + (*p - origin) / n);
+    let (xx, yy, xy) = pts.iter().fold((0.0, 0.0, 0.0), |(xx, yy, xy), p| {
+        let v = *p - center;
+        (xx + v.x * v.x, yy + v.y * v.y, xy + v.x * v.y)
+    });
+    // A near-circle has no useful orientation; keep it upright rather than following noise.
+    if (xx - yy).hypot(2.0 * xy) < 0.1 * (xx + yy) {
+        return 0.0;
+    }
+    ((2.0 * xy).atan2(xx - yy).to_degrees() / 2.0 / 45.0).round().mul_add(45.0, 0.0).rem_euclid(180.0)
+}
+
+/// Dimensions in the fitted frame, but the centre stays in document coordinates.
+fn oriented_bounds(pts: &[Point], rotation: f64) -> Rect {
+    if rotation == 0.0 {
+        return bbox(pts);
+    }
+    let origin = pts.first().copied().unwrap_or(Point::ZERO);
+    let rotate = Affine::rotate(rotation.to_radians());
+    let inverse = Affine::rotate(-rotation.to_radians());
+    let local: Vec<Point> = pts.iter().map(|p| inverse * (*p - origin).to_point()).collect();
+    let b = bbox(&local);
+    Rect::from_center_size(origin + (rotate * b.center()).to_vec2(), (b.width(), b.height()))
 }
 
 /// Number of sharp direction reversals (turns of more than 120°) along the stroke.
@@ -87,22 +237,35 @@ fn reversals(pts: &[Point], min_seg: f64) -> usize {
 
 /// Recognise a freehand stroke (document points, in drawing order).
 pub fn recognize(pts: &[Point]) -> Option<Recognized> {
-    if pts.len() < 2 {
+    if pts.len() < 2 || pts.iter().any(|p| !p.x.is_finite() || !p.y.is_finite()) {
         return None;
     }
     let b = bbox(pts);
     let size = b.width().max(b.height());
-    if size < 2.0 {
+    if size < 2.0 || !size.is_finite() {
         return None;
     }
     let len = path_len(pts);
-    let (first, last) = (pts[0], pts[pts.len() - 1]);
+    if !len.is_finite() || len <= 0.0 {
+        return None;
+    }
+    let original = pts;
+    let samples = resample(pts, len);
+    let pts = samples.as_slice();
+    let (&first, &last) = (pts.first()?, pts.last()?);
+    let chord = first.distance(last);
     // Scribble: several sharp reversals packed into a small area relative to the stroke length.
-    if reversals(pts, size * 0.08) >= 3 && len > 3.0 * size {
-        return Some(Recognized::Scribble(b));
+    if reversals(pts, size * 0.08) >= 2 && len > 1.5 * size {
+        // An equilateral triangle turns 120° at its vertices: drawing noise can make all
+        // three turns just exceed the reversal threshold. Its closed, straight edges and
+        // substantial area distinguish it from a deletion scribble.
+        let corners = closed_corners(pts, size * 0.12);
+        let triangle = chord <= 0.25 * size && corners.len() == 3 && area(pts) > 0.2 * size * size && is_polygonal(pts, &corners, size, 0.055);
+        if !triangle {
+            return Some(Recognized::Scribble(b));
+        }
     }
     // Line: every point near the chord.
-    let chord = first.distance(last);
     let max_dev = pts.iter().map(|p| dist_to_segment(*p, first, last)).fold(0.0, f64::max);
     if chord > 0.5 * size && max_dev < 0.08 * chord.max(1.0) && len < 1.3 * chord {
         return Some(Recognized::Line { a: first, b: last });
@@ -111,13 +274,11 @@ pub fn recognize(pts: &[Point]) -> Option<Recognized> {
     if chord > 0.25 * size {
         return None;
     }
-    let mut closed: Vec<Point> = pts.to_vec();
-    closed.push(first);
-    let mut corners = simplify(&closed, size * 0.12);
-    if corners.len() > 1 && corners[0].distance(corners[corners.len() - 1]) < size * 0.15 {
-        corners.pop();
-    }
+    let corners = closed_corners(pts, size * 0.12);
     let fill = area(pts) / (b.width() * b.height()).max(1e-9);
+    if !fill.is_finite() {
+        return None;
+    }
     let center = b.center();
     let square = |r: Rect| {
         let (w, h) = (r.width(), r.height());
@@ -131,33 +292,36 @@ pub fn recognize(pts: &[Point]) -> Option<Recognized> {
     match corners.len() {
         3 => {
             let radius = corners.iter().map(|p| p.distance(center)).sum::<f64>() / 3.0;
-            // Rotation of the vertex nearest straight up (y grows downward).
-            let top = corners.iter().copied().min_by(|a, b| a.y.total_cmp(&b.y)).unwrap_or(center);
-            let rot = (top - center).atan2().to_degrees() + 90.0;
-            Some(Recognized::Polygon { center, radius, sides: 3, rotation: rot })
+            Some(Recognized::Polygon { center, radius, sides: 3, rotation: polygon_rotation(&corners, 180.0) })
         }
-        4 if fill > 0.86 => Some(Recognized::Rectangle(square(b))),
-        // A diamond: a square standing on a corner.
-        4 if (0.4..0.62).contains(&fill) => {
-            let radius = corners.iter().map(|p| p.distance(center)).sum::<f64>() / 4.0;
-            Some(Recognized::Polygon { center, radius, sides: 4, rotation: 0.0 })
+        4 if is_rectangle(pts, &corners, size) => {
+            let rotation = rectangle_rotation(&corners);
+            Some(Recognized::Rectangle { rect: square(oriented_bounds(original, rotation)), rotation })
         }
-        n @ 5..=8 if fill > 0.6 && fill < 0.85 && is_polygonal(pts, &corners, size) => {
+        n @ 5..=8 if fill > 0.6 && fill < 0.85 && is_polygonal(pts, &corners, size, 0.02) => {
             let radius = corners.iter().map(|p| p.distance(center)).sum::<f64>() / n as f64;
-            Some(Recognized::Polygon { center, radius, sides: n as u32, rotation: 0.0 })
+            Some(Recognized::Polygon { center, radius, sides: n as u32, rotation: if n == 6 { polygon_rotation(&corners, 90.0) } else { 0.0 } })
+        }
+        _ => {
+            let rotation = ellipse_rotation(pts);
+            let rect = oriented_bounds(original, rotation);
+            (area(pts) / (rect.width() * rect.height()).max(1e-9) > 0.6).then(|| Recognized::Ellipse { rect: square(rect), rotation })
         }
-        _ if fill > 0.6 => Some(Recognized::Ellipse(square(b))),
-        _ => None,
     }
 }
 
 /// Do the stroke's points hug the straight edges between `corners` (rather than bulging like an
 /// ellipse)?
-fn is_polygonal(pts: &[Point], corners: &[Point], size: f64) -> bool {
-    let n = corners.len();
-    let dev: f64 = pts.iter().map(|p| (0..n).map(|i| dist_to_segment(*p, corners[i], corners[(i + 1) % n])).fold(f64::MAX, f64::min)).sum::<f64>()
+fn is_polygonal(pts: &[Point], corners: &[Point], size: f64, tolerance: f64) -> bool {
+    if pts.is_empty() || corners.len() < 3 {
+        return false;
+    }
+    let dev: f64 = pts
+        .iter()
+        .map(|p| corners.iter().zip(corners.iter().cycle().skip(1)).map(|(&a, &b)| dist_to_segment(*p, a, b)).fold(f64::MAX, f64::min))
+        .sum::<f64>()
         / pts.len() as f64;
-    dev < 0.02 * size
+    dev < tolerance * size
 }
 
 #[cfg(test)]
@@ -192,20 +356,45 @@ mod tests {
     #[test]
     fn rough_rectangle_and_square() {
         let r = wobbly(&[Point::new(0.0, 0.0), Point::new(200.0, 0.0), Point::new(200.0, 100.0), Point::new(0.0, 100.0)], 20, 2.0);
-        let Some(Recognized::Rectangle(b)) = recognize(&r) else { panic!("{:?}", recognize(&r)) };
+        let Some(Recognized::Rectangle { rect: b, .. }) = recognize(&r) else { panic!("{:?}", recognize(&r)) };
         assert!((b.width() - 200.0).abs() < 8.0 && (b.height() - 100.0).abs() < 8.0);
         let s = wobbly(&[Point::new(0.0, 0.0), Point::new(100.0, 0.0), Point::new(100.0, 95.0), Point::new(0.0, 95.0)], 20, 1.0);
-        let Some(Recognized::Rectangle(b)) = recognize(&s) else { panic!() };
+        let Some(Recognized::Rectangle { rect: b, .. }) = recognize(&s) else { panic!() };
         assert!((b.width() - b.height()).abs() < 1e-9, "near-squares snap to squares");
     }
 
+    #[test]
+    fn rough_squares_are_rectangles_from_any_starting_point() {
+        let cases = [
+            [Point::new(0.0, 0.0), Point::new(100.0, 8.0), Point::new(94.0, 100.0), Point::new(10.0, 91.0)],
+            [Point::new(0.0, 8.0), Point::new(94.0, 0.0), Point::new(100.0, 95.0), Point::new(7.0, 100.0)],
+        ];
+        for vertices in cases {
+            for wobble in [0.5, 4.0] {
+                let mut stroke = wobbly(&vertices, 24, wobble);
+                stroke.pop();
+                for start in [0, 5, 12, 20, 30, 47, 60, 79] {
+                    stroke.rotate_left(start);
+                    let mut closed = stroke.clone();
+                    closed.push(stroke[0] + Vec2::new(2.0, -1.0));
+                    assert!(
+                        matches!(recognize(&closed), Some(Recognized::Rectangle { .. })),
+                        "wobble {wobble}, start {start}: {:?}",
+                        recognize(&closed)
+                    );
+                    stroke.rotate_right(start);
+                }
+            }
+        }
+    }
+
     #[test]
     fn ellipse_circle_triangle_hexagon_line() {
         assert!(
-            matches!(recognize(&circle(Point::new(100.0, 100.0), 80.0, 40.0, 72)), Some(Recognized::Ellipse(r)) if r.width() > 150.0 && r.height() < 100.0)
+            matches!(recognize(&circle(Point::new(100.0, 100.0), 80.0, 40.0, 72)), Some(Recognized::Ellipse { rect: r, .. }) if r.width() > 150.0 && r.height() < 100.0)
         );
         assert!(
-            matches!(recognize(&circle(Point::new(100.0, 100.0), 50.0, 48.0, 72)), Some(Recognized::Ellipse(r)) if (r.width() - r.height()).abs() < 1e-9)
+            matches!(recognize(&circle(Point::new(100.0, 100.0), 50.0, 48.0, 72)), Some(Recognized::Ellipse { rect: r, .. }) if (r.width() - r.height()).abs() < 1e-9)
         );
         let tri = wobbly(&[Point::new(100.0, 0.0), Point::new(200.0, 170.0), Point::new(0.0, 170.0)], 25, 1.5);
         assert!(matches!(recognize(&tri), Some(Recognized::Polygon { sides: 3, rotation, .. }) if rotation.abs() < 5.0), "{:?}", recognize(&tri));
@@ -220,6 +409,151 @@ mod tests {
         assert!(matches!(recognize(&line), Some(Recognized::Line { .. })));
     }
 
+    #[test]
+    fn circles_and_real_polygons_keep_their_identity_across_stroke_seams() {
+        for (rx, ry) in [(50.0, 50.0), (80.0, 40.0), (50.0, 40.0)] {
+            let mut stroke = circle(Point::new(100.0, 100.0), rx, ry, 192);
+            stroke.pop();
+            for start in [0, 13, 37, 62, 109] {
+                stroke.rotate_left(start);
+                let mut closed = stroke.clone();
+                closed.push(stroke[0]);
+                assert!(matches!(recognize(&closed), Some(Recognized::Ellipse { .. })), "ellipse {rx}/{ry}, seam {start}: {:?}", recognize(&closed));
+                stroke.rotate_right(start);
+            }
+        }
+        for sides in [3, 5, 6, 8] {
+            let corners: Vec<Point> = (0..sides)
+                .map(|i| {
+                    let a = std::f64::consts::TAU * i as f64 / sides as f64;
+                    Point::new(100.0 + 80.0 * a.cos(), 100.0 + 80.0 * a.sin())
+                })
+                .collect();
+            let mut stroke = wobbly(&corners, 24, 1.0);
+            stroke.pop();
+            for start in [0, 9, 17, 29, 45] {
+                stroke.rotate_left(start);
+                let mut closed = stroke.clone();
+                closed.push(stroke[0]);
+                assert!(
+                    matches!(recognize(&closed), Some(Recognized::Polygon { sides: n, .. }) if n == sides),
+                    "{sides} sides, seam {start}: {:?}",
+                    recognize(&closed)
+                );
+                stroke.rotate_right(start);
+            }
+        }
+    }
+
+    #[test]
+    fn rough_triangles_snap_upright_or_upside_down() {
+        for direction in [0.0_f64, 180.0] {
+            for tilt in [-12.0_f64, -3.0, 4.0, 11.0] {
+                let corners: Vec<Point> = (0..3)
+                    .map(|i| {
+                        let a = (direction + tilt - 90.0).to_radians() + std::f64::consts::TAU * i as f64 / 3.0;
+                        Point::new(200.0 + 80.0 * a.cos(), 300.0 + 80.0 * a.sin())
+                    })
+                    .collect();
+                for reversed in [false, true] {
+                    let mut stroke = wobbly(&corners, 24, 1.5);
+                    stroke.pop();
+                    if reversed {
+                        stroke.reverse();
+                    }
+                    for seam in [0, 9, 28, 51] {
+                        stroke.rotate_left(seam);
+                        let mut closed = stroke.clone();
+                        closed.push(stroke[0]);
+                        let Some(Recognized::Polygon { sides: 3, rotation, .. }) = recognize(&closed) else {
+                            panic!("direction {direction}, tilt {tilt}, seam {seam}: {:?}", recognize(&closed));
+                        };
+                        assert_eq!(rotation, direction, "tilt {tilt}, seam {seam}, reversed {reversed}");
+                        stroke.rotate_right(seam);
+                    }
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn recognized_lines_keep_their_free_angle() {
+        for (dx, dy) in [(120.0, 7.0), (-130.0, -9.0), (8.0, 90.0), (-6.0, -140.0), (60.0, 50.0), (-50.0, -60.0)] {
+            let first = Point::new(200.0, 300.0);
+            let last = first + Vec2::new(dx, dy);
+            let stroke: Vec<Point> = (0..=30).map(|i| first + (last - first) * (i as f64 / 30.0)).collect();
+            assert_eq!(recognize(&stroke), Some(Recognized::Line { a: first, b: last }));
+        }
+    }
+
+    #[test]
+    fn tilted_rectangles_ellipses_and_hexagons_snap_to_their_angle_steps() {
+        for direction in [0.0_f64, 45.0, 90.0, 135.0] {
+            for tilt in [-7.0_f64, 7.0] {
+                let xf = Affine::translate((200.0, 300.0)) * Affine::rotate((direction + tilt).to_radians());
+                let corners: Vec<Point> =
+                    [(-90.0, -40.0), (90.0, -40.0), (90.0, 40.0), (-90.0, 40.0)].into_iter().map(|p| xf * Point::from(p)).collect();
+                let stroke = wobbly(&corners, 24, 1.0);
+                let Some(Recognized::Rectangle { rect, rotation }) = recognize(&stroke) else {
+                    panic!("rectangle {direction}: {:?}", recognize(&stroke))
+                };
+                assert_eq!(rotation % 45.0, 0.0);
+                assert!(rect.center().distance(Point::new(200.0, 300.0)) < 4.0);
+                assert!((rect.width().max(rect.height()) - 180.0).abs() < 15.0);
+                let ellipse: Vec<Point> = circle(Point::ZERO, 90.0, 40.0, 192).into_iter().map(|p| xf * p).collect();
+                let Some(Recognized::Ellipse { rect, rotation }) = recognize(&ellipse) else {
+                    panic!("ellipse {direction}: {:?}", recognize(&ellipse))
+                };
+                assert_eq!(rotation, direction);
+                assert!((rect.width() - 180.0).abs() < 4.0 && (rect.height() - 80.0).abs() < 4.0);
+            }
+        }
+        for direction in [0.0_f64, 90.0] {
+            for tilt in [-7.0_f64, 7.0] {
+                let corners: Vec<Point> = (0..6)
+                    .map(|i| {
+                        let a = (direction + tilt - 90.0).to_radians() + std::f64::consts::TAU * i as f64 / 6.0;
+                        Point::new(200.0 + 70.0 * a.cos(), 300.0 + 70.0 * a.sin())
+                    })
+                    .collect();
+                let stroke = wobbly(&corners, 24, 0.5);
+                let Some(Recognized::Polygon { sides: 6, rotation, .. }) = recognize(&stroke) else { panic!("hexagon: {:?}", recognize(&stroke)) };
+                assert_eq!(rotation, direction);
+            }
+        }
+        // Even sideways input can only produce an upright or inverted triangle.
+        for direction in [83.0_f64, 97.0, 263.0, 277.0] {
+            let corners: Vec<Point> = (0..3)
+                .map(|i| {
+                    let a = (direction - 90.0).to_radians() + std::f64::consts::TAU * i as f64 / 3.0;
+                    Point::new(200.0 + 70.0 * a.cos(), 300.0 + 70.0 * a.sin())
+                })
+                .collect();
+            assert!(matches!(recognize(&wobbly(&corners, 24, 0.5)), Some(Recognized::Polygon { sides: 3, rotation: 0.0 | 180.0, .. })));
+        }
+    }
+
+    #[test]
+    fn square_fit_ignores_sampling_density_and_document_offset() {
+        let mut stroke = wobbly(&[Point::new(0.0, 0.0), Point::new(100.0, 8.0), Point::new(94.0, 100.0), Point::new(10.0, 91.0)], 24, 4.0);
+        for scale in [0.25, 1.0, 20.0] {
+            let shifted: Vec<Point> = stroke.iter().map(|p| Point::new(1e9 + p.x * scale, -1e9 + p.y * scale)).collect();
+            assert!(matches!(recognize(&shifted), Some(Recognized::Rectangle { .. })), "scale {scale}: {:?}", recognize(&shifted));
+        }
+        let dense: Vec<Point> = stroke.iter().enumerate().flat_map(|(i, p)| std::iter::repeat_n(*p, if i < 24 { 100 } else { 1 })).collect();
+        assert_eq!(recognize(&stroke), recognize(&dense));
+        stroke.extend(std::iter::repeat_n(*stroke.last().unwrap(), 10_000));
+        assert!(matches!(recognize(&stroke), Some(Recognized::Rectangle { .. })));
+    }
+
+    #[test]
+    fn non_finite_and_overflowing_strokes_are_not_shapes() {
+        for bad in [f64::NAN, f64::INFINITY, f64::NEG_INFINITY] {
+            assert_eq!(recognize(&[Point::new(0.0, 0.0), Point::new(bad, 100.0)]), None);
+        }
+        assert_eq!(recognize(&[Point::new(-f64::MAX, 0.0), Point::new(f64::MAX, 100.0)]), None);
+    }
+
     #[test]
     fn scribble_and_noise() {
         let z: Vec<Point> = (0..40).map(|i| Point::new(100.0 + (i % 2) as f64 * 60.0, 100.0 + i as f64 * 2.0)).collect();

crates/mcp/src/tests_fileio.rs

@@ -62,6 +62,7 @@ fn export_tool_lists_engine_formats_and_options() {
             "svg",
             "svgz",
             "pdf",
+            "ai",
             "png",
             "jpg",
             "gif",

crates/metafile/src/scene.rs

@@ -189,7 +189,7 @@ impl<'a> Scene<'a> {
                 }
             }
             // Live blends, envelopes, meshes and repeats are written as their evaluated art.
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 let g = vectorcraft_effects::expand_live_deep(Some(self.doc), n);
                 for c in g.children().into_iter().flatten() {
                     self.node(c, false);

crates/pathops/src/lib.rs

@@ -19,7 +19,7 @@ pub use edit::{
     split_into_grid,
 };
 pub use offset::{Cap, Join, offset_path, outline_stroke, stroke_region};
-pub use pathfinder::{PathfinderOp, Region, Shape, merge_regions, pathfinder, region_at, regions};
+pub use pathfinder::{FaceMerger, PathfinderOp, Region, Shape, merge_regions, pathfinder, region_at, regions};
 pub use planar::{BuilderArrangement, SHAPE_BUILDER_MAX_SEGMENTS, cut_out, encloses_area, interior_point, live_paint, shape_builder};
 
 /// Errors from fallible operations.

crates/pathops/src/pathfinder.rs

@@ -7,7 +7,7 @@ use kurbo::{BezPath, ParamCurve, ParamCurveNearest, Point, Shape as _};
 use linesweeper::topology::ContourIdx;
 use vectorcraft_geom::{FillRule, PathData};
 
-use crate::boolean::{Arrangement, Multi, Seg, all_contours_to_path, contours_to_path, fill_bezpath, segs_to_subpath, unite_all};
+use crate::boolean::{Arrangement, Multi, Seg, all_contours_to_path, contours_to_path, fill_bezpath, normalize_bez, segs_to_subpath, unite_all};
 
 /// A filled shape in a Pathfinder stack. `key` identifies its paint (e.g. a hashed fill colour);
 /// results carry the key of the object whose paint they keep.
@@ -264,6 +264,63 @@ pub fn merge_regions(regions: &[&Region]) -> PathData {
     unite_all(&v)
 }
 
+/// Merges faces of the planar arrangement of a set of shapes (as [`regions`] gives them) into one
+/// path, from the arrangement itself, made once for every merge of the set: the faces' contours
+/// share their edges exactly, so the edges between merged faces vanish. Uniting the faces' tidied
+/// outlines ([`merge_regions`]) could leave those edges in, as a hairline gap or a spur, where
+/// neighbouring faces' outlines had been refit apart. Shapes with open paths (faces lines cut)
+/// fall back to [`merge_regions`].
+pub struct FaceMerger {
+    /// The arrangement (`None`: open paths, or the sweep failed) and the number of shapes.
+    arr: Option<Arrangement>,
+    shapes: usize,
+}
+
+impl FaceMerger {
+    pub fn new(shapes: &[Shape]) -> Self {
+        let has_open = shapes.iter().flat_map(|s| &s.path.subpaths).any(|sp| !sp.closed && sp.anchors.len() >= 2);
+        Self { arr: if has_open { None } else { arrangement(shapes) }, shapes: shapes.len() }
+    }
+
+    /// The union of `faces`.
+    pub fn merge(&self, faces: &[&Region]) -> PathData {
+        self.exact(faces).filter(|p| !p.is_empty()).unwrap_or_else(|| merge_regions(faces))
+    }
+
+    fn exact(&self, faces: &[&Region]) -> Option<PathData> {
+        let arr = self.arr.as_ref()?;
+        // Each face by its coverage and a point inside it.
+        let mut picks: Vec<(Vec<bool>, Point)> = Vec::with_capacity(faces.len());
+        for r in faces {
+            let mut mask = vec![false; self.shapes];
+            for &s in &r.sources {
+                *mask.get_mut(s)? = true;
+            }
+            picks.push((mask, crate::planar::interior_point(&r.path)?));
+        }
+        let mut raw = BezPath::new();
+        let mut done: Vec<&[bool]> = vec![];
+        for (mask, _) in &picks {
+            if done.contains(&mask.as_slice()) {
+                continue;
+            }
+            done.push(mask);
+            let c = arr.contours(|k| k == mask.as_slice());
+            for group in c.grouped() {
+                let mut face = BezPath::new();
+                for i in group {
+                    face.extend(c[i].path.iter());
+                }
+                if picks.iter().any(|(m, p)| m == mask && face.winding(*p) != 0) {
+                    raw.extend(face.iter());
+                }
+            }
+        }
+        let merged = normalize_bez(&raw, FillRule::NonZero).ok()?;
+        Some(all_contours_to_path(&merged, &arr.tidy))
+    }
+}
+
 /// Pathfinder Outline: split every shape's boundary at junctions of the arrangement.
 fn outline_edges(arr: &Arrangement, shapes: &[Shape]) -> Vec<Shape> {
     let junctions = arr.junctions();

crates/pdf/src/export.rs

@@ -453,11 +453,13 @@ pub(crate) struct Exporter<'a> {
     /// The fonts real text is written in, by face id, with their units per em; `None` for faces
     /// that can't be embedded.
     fonts: HashMap<u32, Option<(krilla::text::Font, f64)>>,
-    /// Top-level layers are drawn as forms marked for their optional content groups
+    /// Layers and sublayers are drawn as forms marked for their optional content groups
     /// ([`crate::forms`]).
     pub layers: bool,
-    /// A top-level layer's form is being drawn.
-    in_layer: bool,
+    /// Each layer's index in [`crate::forms::pdf_layers`], by address.
+    layer_index: HashMap<usize, usize>,
+    /// The address of the layer whose form is being drawn.
+    in_layer: usize,
     /// Overprinting fills and strokes are drawn as forms marked to overprint.
     pub overprint: bool,
     /// An overprinting fill or stroke was drawn so.
@@ -485,7 +487,8 @@ impl<'a> Exporter<'a> {
             outline_text: set.advanced.outline_text,
             fonts: HashMap::new(),
             layers: false,
-            in_layer: false,
+            layer_index: crate::forms::pdf_layers(doc).iter().enumerate().map(|(i, l)| (address(l.node), i)).collect(),
+            in_layer: 0,
             overprint: false,
             overprinted: false,
         }
@@ -601,6 +604,11 @@ fn constant_mask(s: &mut Surface, page: Rect, alpha: f32) -> krilla::mask::Mask
     krilla::mask::Mask::new(sb.finish(), krilla::mask::MaskType::Alpha)
 }
 
+/// A node's address, to tell the very node apart from equal ones.
+fn address(n: &Node) -> usize {
+    std::ptr::from_ref(n).addr()
+}
+
 fn rects_overlap(a: Rect, b: Rect) -> bool {
     a.x0 <= b.x1 && b.x0 <= a.x1 && a.y0 <= b.y1 && b.y0 <= a.y1
 }
@@ -885,15 +893,15 @@ impl Exporter<'_> {
 
     fn node(&mut self, s: &mut Surface, n: &Node, page: Rect, force: bool) {
         if self.layers
-            && !self.in_layer
-            && let NodeKind::Layer { template: false, printable, .. } = n.kind
+            && self.in_layer != address(n)
+            && let NodeKind::Layer { printable, .. } = n.kind
             && (printable || self.non_printing)
-            && let Some(i) = self.doc.layers.iter().position(|l| std::ptr::eq(&**l, n))
+            && let Some(&i) = self.layer_index.get(&address(n))
         {
-            // A PDF layer: hidden layers are written too (their group is off).
-            self.in_layer = true;
+            // A PDF layer: hidden layers and sublayers are written too (their group is off).
+            let enclosing = std::mem::replace(&mut self.in_layer, address(n));
             crate::forms::form(s, Mark::Layer(i), |s| self.node(s, n, page, true));
-            self.in_layer = false;
+            self.in_layer = enclosing;
             return;
         }
         if !force && !n.visible {
@@ -982,7 +990,7 @@ impl Exporter<'_> {
                 }
             }
             // Live blends/envelopes/meshes export their evaluated (expanded) form.
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 let g = vectorcraft_effects::expand_live_deep(Some(self.doc), n);
                 for c in g.children().into_iter().flatten() {
                     self.node(s, c, page, false);

crates/pdf/src/forms.rs

@@ -11,7 +11,9 @@ use std::io::Read;
 use krilla::geom::PathBuilder;
 use krilla::graphic::Graphic;
 use krilla::surface::Surface;
-use vectorcraft_doc::{Document, NodeKind};
+use std::sync::Arc;
+
+use vectorcraft_doc::{Document, Node, NodeKind};
 
 use crate::encrypt::{Lexer, Obj, StreamSpans, Tok, int, stream_spans};
 use crate::output::{deflate, text_string};
@@ -21,12 +23,36 @@ use crate::{PdfError, PdfSettings, Standard};
 /// What a marked form is.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub(crate) enum Mark {
-    /// The art of top-level layer `i` (`Document::layers`).
+    /// The art of layer `i` of [`pdf_layers`].
     Layer(usize),
     /// A fill or stroke that overprints.
     Overprint,
 }
 
+/// A layer written as a PDF layer (an optional content group).
+pub(crate) struct PdfLayer<'a> {
+    pub node: &'a Node,
+    /// Its parent layer's index in [`pdf_layers`] (none for a top-level layer).
+    pub parent: Option<usize>,
+}
+
+/// The layers written as PDF layers: the top-level layers and their sublayers, but template layers
+/// (and what they hold), each before its sublayers, in paint order (bottom first).
+pub(crate) fn pdf_layers(doc: &Document) -> Vec<PdfLayer<'_>> {
+    fn add<'a>(nodes: &'a [Arc<Node>], parent: Option<usize>, out: &mut Vec<PdfLayer<'a>>) {
+        for n in nodes {
+            if let NodeKind::Layer { template: false, children, .. } = &n.kind {
+                let i = out.len();
+                out.push(PdfLayer { node: n, parent });
+                add(children, Some(i), out);
+            }
+        }
+    }
+    let mut out = vec![];
+    add(&doc.layers, None, &mut out);
+    out
+}
+
 /// The x coordinate of a layer mark's first point (its y is the layer index).
 const LAYER_X: i32 = -32000;
 /// The x coordinate of an overprint mark's first point.
@@ -199,7 +225,7 @@ fn mark_layers(content: &[u8], forms: &HashMap<&[u8], usize>) -> Option<(Vec<u8>
 }
 
 /// Finish the marked forms of `pdf` (as [`crate::export`] writes `doc` with `set`): with
-/// `layers`, each top-level layer (but template layers) becomes an optional content group —
+/// `layers`, each layer and sublayer (but template layers) becomes an optional content group —
 /// named as the layer, off when it is hidden, not printed (`/PrintState /OFF`) when its Print
 /// option is off, locked when it is locked — and the uses of its forms its optional content;
 /// with `overprint`, the overprinting forms get a graphics state that overprints (`/OP`, `/op`,
@@ -228,6 +254,11 @@ pub(crate) fn finish(pdf: Vec<u8>, doc: &Document, set: &PdfSettings, layers: bo
     }
     if layers {
         write_layers(&pdf, &xref, &objects, &marks, &mut patch, doc, set)?;
+        for (n, _) in marks.iter().filter(|(_, m)| matches!(m, Mark::Layer(_))) {
+            if let Some(o) = objects.get(n) {
+                unbox(&pdf, o, &mut patch)?;
+            }
+        }
     }
     let pdf = patch.apply(&pdf, &xref)?;
     // The file still is what its standard says.
@@ -235,8 +266,9 @@ pub(crate) fn finish(pdf: Vec<u8>, doc: &Document, set: &PdfSettings, layers: bo
     Ok(pdf)
 }
 
-/// The optional content groups of `doc`'s top-level layers, the uses of their forms marked as
-/// their content, and the catalog's `/OCProperties`.
+/// The optional content groups of `doc`'s layers and sublayers ([`pdf_layers`]), the uses of their
+/// forms marked as their content, and the catalog's `/OCProperties`, listing sublayers under their
+/// layers.
 fn write_layers(
     pdf: &[u8],
     xref: &Xref,
@@ -247,11 +279,16 @@ fn write_layers(
     set: &PdfSettings,
 ) -> Result<(), PdfError> {
     // One group per layer, in paint order (bottom first).
+    let layers = pdf_layers(doc);
     let mut groups: HashMap<usize, u32> = HashMap::new();
     let (mut all, mut off, mut locked) = (vec![], vec![], vec![]);
-    for (i, l) in doc.layers.iter().enumerate() {
-        let NodeKind::Layer { template: false, printable, .. } = l.kind else { continue };
-        let name = l.name.clone().unwrap_or_else(|| format!("Layer {}", i + 1));
+    // Each layer's sublayers, and the top-level layers, in paint order.
+    let mut children: HashMap<Option<usize>, Vec<usize>> = HashMap::new();
+    for (i, PdfLayer { node: l, parent }) in layers.iter().enumerate() {
+        let siblings = children.entry(*parent).or_default();
+        siblings.push(i);
+        let name = l.name.clone().unwrap_or_else(|| format!("Layer {}", siblings.len()));
+        let printable = matches!(l.kind, NodeKind::Layer { printable: true, .. });
         let on = |b: bool| if b { "ON" } else { "OFF" };
         let g = patch.add_object(
             format!("<</Type/OCG/Name{}/Usage<</View<</ViewState/{}>>/Print<</PrintState/{}>>>>>>", text_string(&name), on(l.visible), on(printable))
@@ -295,9 +332,7 @@ fn write_layers(
         add_resources(patch, res, "Properties", &entries)?;
     }
     let refs = |v: &[u32]| v.iter().map(|g| format!("{g} 0 R")).collect::<Vec<_>>().join(" ");
-    // Layers panels list the top layer first.
-    let order: Vec<u32> = all.iter().rev().copied().collect();
-    let mut config = format!("/Name(Layers)/Order[{}]", refs(&order));
+    let mut config = format!("/Name(Layers)/Order[{}]", order(&children, &groups, None));
     if !off.is_empty() {
         config.push_str(&format!("/OFF[{}]", refs(&off)));
     }
@@ -313,3 +348,35 @@ fn write_layers(
     patch.replace(start + 2, start + 2, format!("/OCProperties<</OCGs[{}]/D<<{config}>>>>", refs(&all)).into_bytes());
     Ok(())
 }
+
+/// A form's box as large as a page can be: the box of a layer's form is only the bounds of its
+/// art, and a reader that makes a clipping group of a form's box (as importers do) would gather a
+/// layer's art and its sublayers' in one group, which no layer can hold. A box round the whole
+/// page clips nothing.
+const UNBOXED: &[u8] = b"[-32767 -32767 32767 32767]";
+
+/// Give the layer's form `o` the [`UNBOXED`] box.
+fn unbox(pdf: &[u8], o: &Object<'_>, patch: &mut Patch) -> Result<(), PdfError> {
+    let Obj::Dict { start, end, .. } = o.dict else { return Err(bad("a layer's form has no dictionary")) };
+    let dict = pdf.get(start..end).ok_or_else(|| bad("a layer's form can't be read"))?;
+    // The writer writes the box as an array of numbers.
+    let at = dict.windows(5).position(|w| w == b"/BBox").ok_or_else(|| bad("a layer's form has no box"))? + 5;
+    let open = at + dict.get(at..).and_then(|d| d.iter().position(|&c| c == b'[')).ok_or_else(|| bad("a layer's form box isn't an array"))?;
+    let close = open + dict.get(open..).and_then(|d| d.iter().position(|&c| c == b']')).ok_or_else(|| bad("a layer's form box isn't an array"))? + 1;
+    patch.replace(start + open, start + close, UNBOXED.to_vec());
+    Ok(())
+}
+
+/// The `/Order` entries of `parent`'s sublayers (the top-level layers for none), the top one first
+/// as Layers panels list them, each followed by an array of its own sublayers when it has some.
+fn order(children: &HashMap<Option<usize>, Vec<usize>>, groups: &HashMap<usize, u32>, parent: Option<usize>) -> String {
+    let mut out = vec![];
+    for &i in children.get(&parent).into_iter().flatten().rev() {
+        let Some(g) = groups.get(&i) else { continue };
+        out.push(format!("{g} 0 R"));
+        if children.contains_key(&Some(i)) {
+            out.push(format!("[{}]", order(children, groups, Some(i))));
+        }
+    }
+    out.join(" ")
+}

crates/pdf/src/import.rs

@@ -537,14 +537,23 @@ struct Frame {
     children: Vec<Arc<Node>>,
     /// The first optional content group entered inside (where the frame's art goes).
     group: Option<usize>,
+    /// The group each child was drawn in, where the frame's art goes when the frame dissolves
+    /// into its parent (a layer's form drawing its sublayers' forms).
+    child_groups: Vec<Option<usize>>,
 }
 
 impl Frame {
     fn new(kind: FrameKind) -> Self {
-        Self { kind, children: vec![], group: None }
+        Self { kind, children: vec![], group: None, child_groups: vec![] }
     }
 }
 
+/// A dissolving frame's `children`, each with the group it was drawn in (`groups`, else the
+/// frame's `group`).
+fn grouped(children: Vec<Arc<Node>>, groups: Vec<Option<usize>>, group: Option<usize>) -> impl Iterator<Item = (Arc<Node>, Option<usize>)> {
+    children.into_iter().zip(groups.into_iter().map(move |g| g.or(group)).chain(std::iter::repeat(group)))
+}
+
 /// Glyphs drawn consecutively with the same paint, merged into one path.
 struct GlyphRun {
     path: BezPath,
@@ -846,8 +855,11 @@ impl<'p> Builder<'p> {
         // A frame's art goes where its first art was drawn (a clip can end in a later group).
         if root {
             self.root_groups.push(group.or(current));
-        } else if f.group.is_none() {
-            f.group = group.or(current);
+        } else {
+            f.child_groups.push(group.or(current));
+            if f.group.is_none() {
+                f.group = group.or(current);
+            }
         }
     }
 
@@ -925,7 +937,7 @@ impl<'p> Builder<'p> {
         let node = match f.kind {
             FrameKind::Root => None,
             FrameKind::Skip => {
-                f.children.into_iter().for_each(|c| self.emit(c, group));
+                grouped(f.children, f.child_groups, group).for_each(|(c, g)| self.emit(c, g));
                 None
             }
             FrameKind::Clip(clip) => {
@@ -934,7 +946,7 @@ impl<'p> Builder<'p> {
                     None
                 } else if noop.is_some_and(|r| bounds(&f.children).is_some_and(|b| contains(r, b))) {
                     // A rectangle around all of its art (a form's box) clips nothing.
-                    f.children.into_iter().for_each(|c| self.emit(c, group));
+                    grouped(f.children, f.child_groups, group).for_each(|(c, g)| self.emit(c, g));
                     None
                 } else {
                     let mut ch = vec![Arc::new(*clip)];
@@ -957,7 +969,7 @@ impl<'p> Builder<'p> {
                 if children.is_empty() {
                     None
                 } else if plain {
-                    children.into_iter().for_each(|c| self.emit(c, group));
+                    grouped(children, f.child_groups, group).for_each(|(c, g)| self.emit(c, g));
                     None
                 } else if let [only] = children.as_slice()
                     && !only.is_container()

crates/pdf/src/lib.rs

@@ -10,7 +10,7 @@
 //!   text in embedded subset fonts (Advanced). Colours are converted, tagged with ICC profiles and
 //!   given an output intent as the Output settings say. Hidden objects,
 //!   guides and template layers are skipped, and so are non-printing layers unless asked for.
-//!   Top-level layers can be PDF layers (optional content groups with their visibility, print
+//!   Layers and sublayers can be PDF layers (optional content groups with their visibility, print
 //!   state and lock), and overprinting fills and strokes overprint (Advanced).
 //!   Each page is its artboard (the trim box) grown by the bleed (the bleed box) and by the
 //!   printer's marks around it (the media box), drawn in Registration. [`PdfSettings`] is the Save PDF

crates/pdf/src/settings.rs

@@ -226,7 +226,7 @@ pub struct PdfSettings {
     pub fast_web_view: bool,
     /// The app opens the written file (frontends only; the writer ignores it).
     pub view_after_saving: bool,
-    /// Write top-level layers as PDF layers (optional content).
+    /// Write layers and sublayers as PDF layers (optional content).
     pub create_layers: bool,
     /// Keep the layers whose Print option is off (they are left out otherwise, unless
     /// `create_layers` is on).
@@ -449,7 +449,7 @@ impl PdfSettings {
         within("advanced.fontSubsetPercent", self.advanced.font_subset_percent, 0.0, 100.0, "%")
     }
 
-    /// Top-level layers are written as PDF layers: asked for, at a version that has them.
+    /// Layers and sublayers are written as PDF layers: asked for, at a version that has them.
     pub fn writes_layers(&self) -> bool {
         self.create_layers && self.compatibility.has_layers()
     }

crates/pdf/src/tests_layers.rs

@@ -131,6 +131,57 @@ fn pdf_layers_import_back_as_layers() {
     }
 }
 
+/// The rows of `nodes` in paint order, depth first: `depth name visible` for layers, `depth fill`
+/// for art.
+fn tree(nodes: &[std::sync::Arc<Node>], depth: usize, out: &mut Vec<String>) {
+    for n in nodes {
+        match &n.kind {
+            NodeKind::Layer { children, .. } => {
+                out.push(format!("{depth} {} {}", n.name.clone().unwrap_or_default(), n.visible));
+                tree(children, depth + 1, out);
+            }
+            _ => out.push(format!("{depth} {:?}", n.appearance.fill().and_then(|f| f.paint.color()))),
+        }
+    }
+}
+
+/// Sublayers are PDF layers listed under their layer's, hidden ones off with their art, and they
+/// import back as sublayers (#372: other apps read a `.ai` file's PDF part).
+#[test]
+fn sublayers_are_nested_pdf_layers_and_import_back() {
+    let mut d = Document::new(200.0, 100.0);
+    d.layers.clear();
+    let layer = |d: &mut Document, name: &str, visible: bool, children: Vec<Node>| {
+        let mut l = Node::layer(d.alloc_id(), name, LayerColor::Preset(0));
+        l.visible = visible;
+        if let NodeKind::Layer { children: c, .. } = &mut l.kind {
+            c.extend(children.into_iter().map(std::sync::Arc::new));
+        }
+        l
+    };
+    let deep = vec![rect(&mut d, 90.0, GREEN)];
+    let deep = layer(&mut d, "Deep", true, deep);
+    let sub = vec![rect(&mut d, 50.0, BLUE), deep];
+    let sub = layer(&mut d, "Sub", false, sub);
+    let main = vec![rect(&mut d, 10.0, RED), sub];
+    let main = layer(&mut d, "Main", true, main);
+    d.layers.push(main.into());
+    let r = export(&d, json!({"createLayers": true, "compression": {"compressText": false}}));
+    oc_properties(&r.bytes, None, |props, xref| {
+        let props = props.expect("/OCProperties");
+        assert_eq!(names(xref, props.get(b"OCGs")), ["Main", "Sub", "Deep"]);
+        assert_eq!(names(xref, props.get::<Dict<'_>>(b"D").unwrap().get(b"OFF")), ["Sub"]);
+    });
+    let text = String::from_utf8_lossy(&r.bytes);
+    let order = text.split("/Order").nth(1).and_then(|o| o.split("]/").next()).unwrap().to_string();
+    assert_eq!(order.matches('[').count(), 3, "each layer's sublayers in an array after it: {order}");
+    let mut got = vec![];
+    tree(&import(&r.bytes).unwrap().layers, 0, &mut got);
+    // Paint order, as it was.
+    let fill = |depth, c: Color| format!("{depth} {:?}", Some(c));
+    assert_eq!(got, ["0 Main true".to_string(), fill(1, RED), "1 Sub false".into(), fill(2, BLUE), "2 Deep true".into(), fill(3, GREEN)]);
+}
+
 #[test]
 fn identical_layers_stay_apart() {
     let mut d = Document::new(200.0, 100.0);

crates/plugins/src/manifest.rs

@@ -139,10 +139,8 @@ impl Manifest {
                 return Err(Error::Manifest(format!("invalid parameter name {k:?}")));
             }
             match spec {
-                ParamSpec::Number { min, max, default } => {
-                    if !(min.is_finite() && max.is_finite() && default.is_finite()) || min > max {
-                        return Err(Error::Manifest(format!("parameter `{k}`: bad range")));
-                    }
+                ParamSpec::Number { min, max, default } if !(min.is_finite() && max.is_finite() && default.is_finite()) || min > max => {
+                    return Err(Error::Manifest(format!("parameter `{k}`: bad range")));
                 }
                 ParamSpec::Int { min, max, .. } if min > max => return Err(Error::Manifest(format!("parameter `{k}`: bad range"))),
                 ParamSpec::Choice { options, default } => {

crates/render/src/lib.rs

@@ -15,6 +15,7 @@ mod ink;
 mod live;
 mod paint;
 mod pattern;
+pub mod placed_document;
 pub mod proof;
 
 use std::collections::HashMap;
@@ -96,6 +97,9 @@ pub struct RenderOptions {
     pub highlight_substitutions: bool,
     /// Edge smoothing (raster export option).
     pub anti_alias: AntiAlias,
+    /// Screen view: placed documents draw from cached bitmaps made in the background (see
+    /// [`placed_document`]); off, they draw exactly, read when needed.
+    pub progressive_placed: bool,
 }
 
 /// How edges are rasterized (raster export option).
@@ -160,6 +164,7 @@ impl Default for RenderOptions {
             mask_view: None,
             highlight_substitutions: false,
             anti_alias: AntiAlias::Art,
+            progressive_placed: false,
         }
     }
 }
@@ -580,6 +585,23 @@ impl Renderer {
         self.render_node_thumbnail(doc, doc.node(id)?, size, None)
     }
 
+    /// Render node `n` of `doc` (its resources) into `w`×`h` transparent pixels through `view`.
+    pub fn render_node(&mut self, doc: &Document, n: &Arc<Node>, w: u16, h: u16, view: Affine) -> Option<Rendered> {
+        let inv = view.inverse();
+        let visible = inv.transform_rect_bbox(Rect::new(0.0, 0.0, w as f64, h as f64));
+        let px = 1.0 / view.determinant().abs().sqrt().max(1e-12);
+        let mut ctx = single_threaded_context(w, h);
+        let opts = RenderOptions::default();
+        let frame = Frame { mt: false, doc, view, visible, px, opts: &opts, ink: Ink::Display };
+        (self.knockout, self.nested, self.backdrop) = (false, 0, None);
+        self.clip_paths.clear();
+        self.draw_arc(&mut ctx, &frame, n);
+        ctx.flush();
+        let mut pm = Pixmap::new(w, h);
+        ctx.render(&mut pm, &mut self.resources);
+        Some(Rendered { width: w as u32, height: h as u32, pixels: pm.data_as_u8_slice().to_vec() })
+    }
+
     /// Render any node (also one outside the tree, e.g. opacity-mask art) fitted into
     /// `size`×`size` pixels, optionally over a solid premultiplied background.
     pub fn render_node_thumbnail(&mut self, doc: &Document, n: &Node, size: u32, background: Option<[u8; 4]>) -> Option<Rendered> {
@@ -916,7 +938,9 @@ impl Renderer {
                     self.draw_node(ctx, f, &art, true);
                 }
             }
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => self.draw_live_node(ctx, f, n),
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
+                self.draw_live_node(ctx, f, n)
+            }
         }
     }
 
@@ -1649,6 +1673,8 @@ mod tests_layeropts;
 #[cfg(test)]
 mod tests_objectfx;
 #[cfg(test)]
+mod tests_placed_document;
+#[cfg(test)]
 mod tests_setup;
 #[cfg(test)]
 mod tests_strokegradient;

crates/render/src/live.rs

@@ -143,6 +143,7 @@ impl Renderer {
     /// Draw the evaluated content of a live node (no transparency group).
     pub(crate) fn draw_live_body(&mut self, ctx: &mut RenderContext, f: &Frame, a: &Arc<Node>, cache: bool) {
         match &a.kind {
+            NodeKind::PlacedDocument(p) => self.draw_placed(ctx, f, p),
             NodeKind::Mesh(m) => self.draw_mesh(ctx, f, a, m, cache),
             NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Repeat(_) | NodeKind::Group { .. } | NodeKind::Layer { .. } => {
                 let items = self.live_expanded(f.doc, a, cache);

crates/render/src/paint.rs

@@ -52,7 +52,22 @@ pub(crate) fn set_paint(ctx: &mut RenderContext, p: &Paint, bounds: Rect, f: &Fr
 
 /// Decode encoded image bytes into a premultiplied pixmap.
 pub fn decode_pixmap(bytes: &[u8]) -> Option<vello_cpu::Pixmap> {
-    let img = image::load_from_memory(bytes).ok()?.to_rgba8();
+    pixmap_of(image::load_from_memory(bytes).ok()?.to_rgba8())
+}
+
+/// [`decode_pixmap`] shrunk to `w`×`h` pixels when the image is larger (never enlarged).
+pub fn decode_pixmap_fit(bytes: &[u8], w: u16, h: u16) -> Option<vello_cpu::Pixmap> {
+    let img = image::load_from_memory(bytes).ok()?;
+    let img = if img.width() > w as u32 || img.height() > h as u32 {
+        img.resize_exact(w as u32, h as u32, image::imageops::FilterType::Triangle)
+    } else {
+        img
+    };
+    pixmap_of(img.to_rgba8())
+}
+
+/// An RGBA image as a premultiplied pixmap.
+fn pixmap_of(img: image::RgbaImage) -> Option<vello_cpu::Pixmap> {
     let (w, h) = img.dimensions();
     if w == 0 || h == 0 || w > u16::MAX as u32 || h > u16::MAX as u32 {
         return None;

crates/render/src/placed_document.rs

@@ -0,0 +1,359 @@
+//! Drawing placed documents ([`PlacedDocument`]).
+//!
+//! Exactly: the art read from the file ([`vectorcraft_doc::placed_document::read`]) drawn with its
+//! own resources, through a view that maps its artboard into the object's box (nothing is copied
+//! into the document).
+//!
+//! On screen ([`RenderOptions::progressive_placed`]): a placed document can't be edited, so what
+//! it shows is cached as a bitmap per file and zoom step (a power of two, in device pixels per
+//! point), shared by every object showing that file. A bitmap not made yet is made on a
+//! background worker while the frame shows another step's bitmap, or a light placeholder;
+//! [`generation`] changes when one is ready and [`busy`] says whether any is coming, so the screen
+//! can draw again. Past [`MAX_SIDE`] pixels, and in outline, proofing and ink frames, it is drawn
+//! exactly.
+//!
+//! A document opened with only its placed documents' previews ([`ImageBlob::is_proxy`]) shows them
+//! up to their resolution; past it the file is read again in the background
+//! ([`vectorcraft_doc::placed_document::full_bytes`]), the preview standing in until then (and for
+//! good when the file can't be found). Placed documents inside a placed document are drawn the
+//! same way, up to [`MAX_DEPTH`] deep; deeper ones show their previews.
+
+use std::cell::Cell;
+use std::collections::{HashMap, HashSet};
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::{Arc, LazyLock, Mutex, MutexGuard, PoisonError};
+
+use vectorcraft_doc::placed_document::MAX_DEPTH;
+use vectorcraft_doc::{ImageBlob, Node, PlacedDocument};
+use vectorcraft_geom::{Affine, Rect};
+use vello_cpu::{Pixmap, RenderContext, kurbo, peniko};
+
+use crate::ink::Ink;
+use crate::{Frame, Renderer};
+
+/// The longest side of a cached bitmap (pixels); larger steps draw exactly.
+pub const MAX_SIDE: f64 = 4096.0;
+/// The most bytes of bitmaps kept.
+const BUDGET: usize = 512 << 20;
+/// The smallest zoom step (device pixels per point).
+const MIN_STEP: f64 = 1.0 / 64.0;
+
+/// A bitmap's identity: the file shown (its key) and the zoom step's bits.
+type BitmapKey = (String, u64);
+
+struct Bitmap {
+    pm: Arc<Pixmap>,
+    step: f64,
+    used: u64,
+}
+
+#[derive(Default)]
+struct Bitmaps {
+    map: HashMap<BitmapKey, Bitmap>,
+    clock: u64,
+    bytes: usize,
+}
+
+static BITMAPS: LazyLock<Mutex<Bitmaps>> = LazyLock::new(Default::default);
+/// Bitmaps being made.
+static PENDING: LazyLock<Mutex<HashSet<BitmapKey>>> = LazyLock::new(Default::default);
+static GENERATION: AtomicU64 = AtomicU64::new(0);
+
+fn lock<T>(m: &Mutex<T>) -> MutexGuard<'_, T> {
+    // The caches stay whole if a holder panicked (entries are only inserted and removed).
+    m.lock().unwrap_or_else(PoisonError::into_inner)
+}
+
+/// Changes whenever a bitmap made in the background is ready: a screen showing placed documents
+/// draws again when it does.
+pub fn generation() -> u64 {
+    GENERATION.load(Ordering::Relaxed)
+}
+
+/// Are bitmaps being made in the background?
+pub fn busy() -> bool {
+    !lock(&PENDING).is_empty()
+}
+
+/// Is a bitmap of file `key` being made?
+#[cfg(test)]
+pub(crate) fn pending_for(key: &str) -> bool {
+    lock(&PENDING).iter().any(|k| k.0 == key)
+}
+
+/// The zoom step for `scale` device pixels per point: the power of two at or above it.
+pub(crate) fn step(scale: f64) -> Option<f64> {
+    (scale.is_finite() && scale > 0.0).then(|| 2f64.powf(scale.log2().ceil()).max(MIN_STEP))
+}
+
+impl Bitmaps {
+    fn get(&mut self, k: &BitmapKey) -> Option<Arc<Pixmap>> {
+        self.clock += 1;
+        let clock = self.clock;
+        let b = self.map.get_mut(k)?;
+        b.used = clock;
+        Some(b.pm.clone())
+    }
+
+    /// The bitmap of another step of the same file, the nearest to `step`.
+    fn nearest(&self, key: &str, step: f64) -> Option<(Arc<Pixmap>, f64)> {
+        self.map
+            .iter()
+            .filter(|((k, _), _)| k == key)
+            .min_by(|a, b| (a.1.step / step).log2().abs().total_cmp(&(b.1.step / step).log2().abs()))
+            .map(|(_, b)| (b.pm.clone(), b.step))
+    }
+
+    fn insert(&mut self, k: BitmapKey, pm: Pixmap, step: f64) {
+        self.clock += 1;
+        let size = pm.width() as usize * pm.height() as usize * 4;
+        self.bytes += size;
+        if let Some(old) = self.map.insert(k, Bitmap { pm: Arc::new(pm), step, used: self.clock }) {
+            self.bytes = self.bytes.saturating_sub(old.pm.width() as usize * old.pm.height() as usize * 4);
+        }
+        while self.bytes > BUDGET && self.map.len() > 1 {
+            let Some(k) = self.map.iter().min_by_key(|(_, b)| b.used).map(|(k, _)| k.clone()) else { break };
+            if let Some(b) = self.map.remove(&k) {
+                self.bytes = self.bytes.saturating_sub(b.pm.width() as usize * b.pm.height() as usize * 4);
+            }
+        }
+    }
+}
+
+/// What a bitmap is made from.
+struct Job {
+    key: BitmapKey,
+    object: PlacedDocument,
+    blob: ImageBlob,
+    step: f64,
+}
+
+/// Device pixels per point of `object`'s box its preview `bytes` have.
+fn preview_density(object: &PlacedDocument, bytes: &[u8]) -> f64 {
+    vectorcraft_doc::placed_document::image_size(bytes).map_or(0.0, |(w, _)| w as f64 / object.width.max(1e-9))
+}
+
+thread_local! {
+    /// How deep inside placed documents this thread is drawing.
+    static DEPTH: Cell<usize> = const { Cell::new(0) };
+}
+
+/// While alive: drawing inside a placed document, one level deeper.
+struct Inside;
+
+impl Inside {
+    fn enter() -> Self {
+        DEPTH.with(|d| d.set(d.get() + 1));
+        Inside
+    }
+}
+
+impl Drop for Inside {
+    fn drop(&mut self) {
+        DEPTH.with(|d| d.set(d.get().saturating_sub(1)));
+    }
+}
+
+fn depth() -> usize {
+    DEPTH.with(Cell::get)
+}
+
+/// Render `art` of a placed document's file (`doc`, its resources) into `w`×`h` transparent
+/// pixels through `view`, the placed documents inside it one level deeper.
+pub fn render_inside(r: &mut Renderer, doc: &vectorcraft_doc::Document, art: &Arc<Node>, w: u16, h: u16, view: Affine) -> Option<crate::Rendered> {
+    let _inside = Inside::enter();
+    r.render_node(doc, art, w, h, view)
+}
+
+/// `object`'s file (`blob`) as a bitmap of `step` device pixels per point of its box: from its
+/// preview when that is all there is and is fine enough, else from the file (read again when
+/// needed; the preview when it can't be).
+fn make(r: &mut Renderer, object: &PlacedDocument, blob: &ImageBlob, step: f64) -> Option<Pixmap> {
+    let (w, h) = (pixels(object.width * step), pixels(object.height * step));
+    let preview = if blob.is_proxy() { Some(blob.bytes.clone()) } else { blob.proxy.clone() };
+    let full = match blob.is_proxy() {
+        true if step <= preview_density(object, &blob.bytes) * 1.01 => None,
+        true => vectorcraft_doc::placed_document::full_bytes(object, blob),
+        false => Some(blob.bytes.clone()),
+    };
+    let read = full.and_then(|bytes| vectorcraft_doc::placed_document::read(object, &bytes));
+    let Some(e) = read else { return crate::paint::decode_pixmap_fit(&preview?, w, h) };
+    let f = e.frame;
+    let (sx, sy) = (w as f64 / f.width(), h as f64 / f.height());
+    let view = Affine::scale_non_uniform(sx, sy) * Affine::translate((-f.x0, -f.y0));
+    let img = render_inside(r, &e.doc, &e.art, w, h, view)?;
+    let data = img.pixels.as_chunks::<4>().0.iter().map(|&[r, g, b, a]| vello_cpu::color::PremulRgba8 { r, g, b, a }).collect();
+    Some(Pixmap::from_parts(data, w, h))
+}
+
+/// A bitmap side for `v` pixels (at least 1).
+fn pixels(v: f64) -> u16 {
+    v.round().clamp(1.0, MAX_SIDE) as u16
+}
+
+/// Make `job`'s bitmap and keep it.
+fn run(r: &mut Renderer, job: Job) {
+    if let Some(pm) = make(r, &job.object, &job.blob, job.step) {
+        lock(&BITMAPS).insert(job.key.clone(), pm, job.step);
+    }
+    lock(&PENDING).remove(&job.key);
+    GENERATION.fetch_add(1, Ordering::Relaxed);
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+mod workers {
+    use std::sync::mpsc::{Sender, channel};
+    use std::sync::{Arc, LazyLock, Mutex};
+
+    use super::Job;
+
+    /// The queue the workers take jobs from; `None` when no worker could start.
+    static QUEUE: LazyLock<Option<Mutex<Sender<Box<Job>>>>> = LazyLock::new(|| {
+        let (tx, rx) = channel::<Box<Job>>();
+        let rx = Arc::new(Mutex::new(rx));
+        let n = std::thread::available_parallelism().map_or(2, |n| (n.get() / 2).clamp(1, 4));
+        let mut started = 0;
+        for i in 0..n {
+            let rx = rx.clone();
+            let spawned = std::thread::Builder::new().name(format!("vectorcraft-placed-{i}")).spawn(move || {
+                let mut r = crate::Renderer::new();
+                r.threads = 0;
+                loop {
+                    let job = super::lock(&rx).recv();
+                    let Ok(job) = job else { break };
+                    // A panic loses this bitmap, not the worker.
+                    let key = job.key.clone();
+                    if std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| super::run(&mut r, *job))).is_err() {
+                        super::lock(&super::PENDING).remove(&key);
+                    }
+                }
+            });
+            started += usize::from(spawned.is_ok());
+        }
+        (started > 0).then(|| Mutex::new(tx))
+    });
+
+    /// Hand `job` to a worker; back when there is none.
+    pub(super) fn submit(job: Box<Job>) -> Result<(), Box<Job>> {
+        match QUEUE.as_ref() {
+            Some(q) => super::lock(q).send(job).map_err(|e| e.0),
+            None => Err(job),
+        }
+    }
+}
+
+/// Make `job`'s bitmap in the background (here and now where there are no threads).
+fn schedule(job: Job) {
+    if !lock(&PENDING).insert(job.key.clone()) {
+        return;
+    }
+    #[cfg(not(target_arch = "wasm32"))]
+    let job = match workers::submit(Box::new(job)) {
+        Ok(()) => return,
+        Err(job) => *job,
+    };
+    run(&mut Renderer::new(), job);
+}
+
+/// The mean scale of `a`.
+fn mean_scale(a: Affine) -> f64 {
+    a.determinant().abs().sqrt()
+}
+
+impl Renderer {
+    /// Draw placed document `p` in frame `f`: from a cached bitmap on screen, else exactly.
+    pub(crate) fn draw_placed(&mut self, ctx: &mut RenderContext, f: &Frame, p: &PlacedDocument) {
+        let plain = f.ink == Ink::Display && !f.opts.outline && f.opts.proof.is_none() && !f.opts.overprint_preview;
+        if f.opts.progressive_placed && plain && depth() == 0 && self.draw_placed_bitmap(ctx, f, p) {
+            return;
+        }
+        let Some(blob) = f.doc.images.get(&p.key) else { return };
+        // The file's bytes: stored, read again already, or (inside another placed document, while
+        // not too deep) read again now.
+        let full = match depth() {
+            0 => vectorcraft_doc::placed_document::full_bytes_cached(p, blob),
+            d if d < MAX_DEPTH => vectorcraft_doc::placed_document::full_bytes(p, blob),
+            _ => None,
+        };
+        let read = full.and_then(|bytes| vectorcraft_doc::placed_document::read(p, &bytes));
+        let Some(e) = read else {
+            // Only the preview: drawn scaled into the box.
+            if blob.is_proxy()
+                && let Some(im) = p.preview_image(&blob.bytes)
+            {
+                self.draw_image(ctx, f, &im);
+            }
+            return;
+        };
+        let Some(m) = p.art_xf(e.frame) else { return };
+        let k = mean_scale(m);
+        if !k.is_finite() || k <= 1e-12 {
+            return;
+        }
+        // The art in its own coordinates, with its own resources.
+        let inner = Frame { doc: &e.doc, view: f.view * m, visible: m.inverse().transform_rect_bbox(f.visible), px: f.px / k, ..*f };
+        let _inside = Inside::enter();
+        self.draw_arc(ctx, &inner, &e.art);
+    }
+
+    /// Draw `p` from its bitmap at this zoom step, or (while that is made) another step's, or a
+    /// placeholder. False when bitmaps don't suit (too large).
+    fn draw_placed_bitmap(&mut self, ctx: &mut RenderContext, f: &Frame, p: &PlacedDocument) -> bool {
+        let m = f.view * p.xf;
+        let Some(step) = step(mean_scale(m)) else { return false };
+        if p.width * step > MAX_SIDE || p.height * step > MAX_SIDE {
+            return false;
+        }
+        let Some(blob) = f.doc.images.get(&p.key).cloned() else { return true };
+        let key = (p.key.clone(), step.to_bits());
+        let (found, nearest) = {
+            let mut b = lock(&BITMAPS);
+            let found = b.get(&key);
+            let nearest = if found.is_none() { b.nearest(&p.key, step) } else { None };
+            (found, nearest)
+        };
+        let shown = match found {
+            Some(pm) => Some(pm),
+            None => {
+                schedule(Job { key, object: p.clone(), blob, step });
+                // Made here and now (no threads) or meanwhile another step's.
+                let mut b = lock(&BITMAPS);
+                b.get(&(p.key.clone(), step.to_bits())).or(nearest.map(|n| n.0))
+            }
+        };
+        let rect = Rect::new(0.0, 0.0, p.width, p.height);
+        match shown {
+            Some(pm) => {
+                let (sx, sy) = (p.width / pm.width().max(1) as f64, p.height / pm.height().max(1) as f64);
+                ctx.set_paint(vello_cpu::Image { image: vello_cpu::ImageSource::Pixmap(pm), sampler: peniko::ImageSampler::default() });
+                ctx.set_transform(m);
+                ctx.set_paint_transform(Affine::scale_non_uniform(sx, sy));
+                ctx.fill_rect(&kurbo::Rect::new(rect.x0, rect.y0, rect.x1, rect.y1));
+                ctx.reset_paint_transform();
+            }
+            None => {
+                // Coming: a light box where it will be.
+                ctx.set_transform(m);
+                ctx.set_paint(peniko::Color::from_rgba8(128, 128, 128, 40));
+                ctx.fill_rect(&kurbo::Rect::new(rect.x0, rect.y0, rect.x1, rect.y1));
+            }
+        }
+        true
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn zoom_steps_are_powers_of_two_at_or_above_the_scale() {
+        assert_eq!(step(1.0), Some(1.0));
+        assert_eq!(step(1.2), Some(2.0));
+        assert_eq!(step(0.3), Some(0.5));
+        assert_eq!(step(5.0), Some(8.0));
+        assert_eq!(step(1e-9), Some(MIN_STEP));
+        assert_eq!(step(f64::NAN), None);
+        assert_eq!(step(0.0), None);
+    }
+}

crates/render/src/tests_placed_document.rs

@@ -0,0 +1,136 @@
+//! Placed documents on screen: drawn from bitmaps made in the background (a placeholder until
+//! then), the same as drawn exactly; exports draw them exactly at once.
+
+use vectorcraft_color::{Color, Paint};
+use vectorcraft_doc::{Appearance, ImageBlob, LinkInfo, Node, NodeId, NodeKind, PlacedDocument};
+use vectorcraft_geom::shapes;
+
+use super::*;
+
+/// Every file reads as a 40×20 artboard filled blue; a file whose bytes start with `loop` also
+/// places itself (the same key) in its middle.
+fn blue_page(p: &PlacedDocument, bytes: &[u8]) -> Option<(Document, Node, Rect)> {
+    let mut d = Document::new(40.0, 20.0);
+    d.layers.clear();
+    let blue = Appearance::basic(Paint::solid(Color::rgb(0.0, 0.0, 1.0)), Paint::None, 0.0);
+    let mut children = vec![Arc::new(Node::path(NodeId(1), shapes::rectangle(Rect::new(0.0, 0.0, 40.0, 20.0)), blue))];
+    if bytes.starts_with(b"loop") {
+        d.images.insert(p.key.clone(), ImageBlob::new("application/json", bytes.to_vec()));
+        let me = PlacedDocument { xf: Affine::translate((10.0, 5.0)) * Affine::scale(0.5), ..p.clone() };
+        children.push(Arc::new(Node::new(NodeId(2), NodeKind::PlacedDocument(Box::new(me)))));
+    }
+    Some((d, Node::new(NodeId(0), NodeKind::Group { children, clip: false }), Rect::new(0.0, 0.0, 40.0, 20.0)))
+}
+
+/// A 100×100 document showing one placed file (`bytes` under `key`) in the box (10, 10)–(90, 50).
+fn doc_with(key: &str, bytes: &[u8]) -> Document {
+    vectorcraft_doc::placed_document::set_loader(blue_page);
+    let mut d = Document::new(100.0, 100.0);
+    d.images.insert(key.into(), ImageBlob::new("application/json", bytes.to_vec()));
+    let p = PlacedDocument {
+        link: LinkInfo::new("/art/card.vectorcraft"),
+        key: key.into(),
+        bounding: false,
+        width: 40.0,
+        height: 20.0,
+        xf: Affine::translate((10.0, 10.0)) * Affine::scale(2.0),
+        placement: Default::default(),
+    };
+    let l = d.layers[0].id;
+    d.insert(Some(l), 0, Node::new(NodeId(50), NodeKind::PlacedDocument(Box::new(p)))).unwrap();
+    d
+}
+
+fn doc(key: &str) -> Document {
+    doc_with(key, format!("{{\"doc\": \"{key}\"}}").as_bytes())
+}
+
+fn render(d: &Document, progressive: bool) -> Rendered {
+    let opts = RenderOptions { background: Some([255, 255, 255, 255]), progressive_placed: progressive, ..Default::default() };
+    Renderer::new().render(d, 100, 100, Affine::IDENTITY, &opts)
+}
+
+/// Wait for the background bitmaps (at most 10 s).
+fn settle() {
+    let t = std::time::Instant::now();
+    while placed_document::busy() && t.elapsed().as_secs() < 10 {
+        std::thread::sleep(std::time::Duration::from_millis(5));
+    }
+    assert!(!placed_document::busy(), "bitmaps still coming");
+}
+
+#[test]
+fn a_placed_document_draws_exactly_with_its_own_art() {
+    let d = doc("exact-1");
+    let r = render(&d, false);
+    assert_eq!(&r.pixel(50, 30)[..3], &[0, 0, 255], "blue inside the box");
+    assert_eq!(&r.pixel(95, 95)[..3], &[255, 255, 255], "nothing outside");
+}
+
+#[test]
+fn on_screen_a_placed_document_shows_a_placeholder_then_its_bitmap() {
+    let d = doc("progressive-1");
+    let generation = placed_document::generation();
+    let first = render(&d, true);
+    let shown = &first.pixel(50, 30)[..3];
+    assert!(shown == [0, 0, 255] || shown != [255, 255, 255], "a placeholder or the art: {shown:?}");
+    settle();
+    assert!(placed_document::generation() > generation || shown == [0, 0, 255], "a bitmap was made");
+    let later = render(&d, true);
+    let exact = render(&d, false);
+    assert_eq!(&later.pixel(50, 30)[..3], &[0, 0, 255]);
+    for (x, y) in [(12, 12), (50, 30), (88, 48), (95, 95), (5, 5)] {
+        let (a, b) = (later.pixel(x, y), exact.pixel(x, y));
+        assert!(a.iter().zip(b).all(|(a, b)| a.abs_diff(b) <= 24), "at ({x}, {y}): {a:?} vs {b:?}");
+    }
+}
+
+#[test]
+fn copies_of_one_placed_document_share_its_bitmap() {
+    let mut d = doc("shared-1");
+    let n = d.node(NodeId(50)).unwrap().clone();
+    let l = d.layers[0].id;
+    let mut copy = n.clone();
+    copy.id = NodeId(51);
+    copy.transform(Affine::translate((0.0, 45.0)), false);
+    d.insert(Some(l), 1, copy).unwrap();
+    render(&d, true);
+    settle();
+    let r = render(&d, true);
+    assert!(!placed_document::pending_for("shared-1"), "nothing more to make");
+    assert_eq!(&r.pixel(50, 30)[..3], &[0, 0, 255]);
+    assert_eq!(&r.pixel(50, 75)[..3], &[0, 0, 255]);
+}
+
+#[test]
+fn a_placed_document_kept_as_its_preview_draws_the_preview() {
+    let mut d = doc("preview-1");
+    // Only the preview (a 20×10 green PNG) is there, and the file can't be read here.
+    let img = image::RgbaImage::from_pixel(20, 10, image::Rgba([0, 200, 0, 255]));
+    let mut png = vec![];
+    img.write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png).unwrap();
+    let mut blob = ImageBlob::new("image/png", png);
+    blob.proxy = Some(blob.bytes.clone());
+    d.images.insert("preview-1".into(), blob);
+    let exact = render(&d, false);
+    assert_eq!(&exact.pixel(50, 30)[..3], &[0, 200, 0], "the preview, in the box");
+    assert_eq!(&exact.pixel(95, 95)[..3], &[255, 255, 255]);
+    // On screen past the preview's resolution (it has 0.5 px a point; this is 2): still the preview.
+    render(&d, true);
+    settle();
+    let shown = render(&d, true);
+    assert_eq!(&shown.pixel(50, 30)[..3], &[0, 200, 0]);
+}
+
+#[test]
+fn a_document_that_places_itself_draws_a_few_levels_deep_then_stops() {
+    let d = doc_with("loop-1", b"loop");
+    let t = std::time::Instant::now();
+    let r = render(&d, false);
+    assert!(t.elapsed().as_secs() < 10);
+    assert_eq!(&r.pixel(50, 30)[..3], &[0, 0, 255]);
+    // On screen too.
+    render(&d, true);
+    settle();
+    assert_eq!(&render(&d, true).pixel(50, 30)[..3], &[0, 0, 255]);
+}

crates/svg/src/css.rs

@@ -50,9 +50,13 @@ pub(crate) fn blend_css(b: BlendMode) -> &'static str {
     }
 }
 
-/// An object's opacity, blend mode and isolation.
+/// An object's opacity, blend mode and isolation, and `display: none` when it is hidden (written
+/// only when hidden objects are kept).
 pub(crate) fn transparency(n: &Node) -> Props {
     let mut p = Props::new();
+    if !n.visible {
+        p.push(("display", "none".into()));
+    }
     if n.opacity < 1.0 {
         p.push(("opacity", fmt_num(n.opacity as f64, 3)));
     }
@@ -545,6 +549,10 @@ impl Rules<'_> {
         if let Some(l) = st.leading {
             art.props.push(("line-height", self.len(l)));
         }
+        // One element: the first paragraph's alignment.
+        if (1..t.paragraph_count()).any(|i| t.para_at(i).justify != t.para.justify) {
+            art.unsupported("paragraphs aligned differently");
+        }
         let align = match t.para.justify {
             Justify::Auto | Justify::Left => None,
             Justify::Center => Some("center"),

crates/svg/src/export.rs

@@ -343,7 +343,7 @@ impl Reuse {
             }
         }
         match &n.kind {
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 (self.turns, self.scales) = (false, false)
             }
             NodeKind::SymbolInstance { symbol, .. } => {
@@ -545,15 +545,25 @@ impl Writer<'_> {
     }
     /// ` id="…"` for a named object, plus ` data-name="…"` with the name itself when the id had to
     /// differ from it (spaces, punctuation, duplicates, the unique prefix).
+    /// The id of `n`'s element (with its name when the id isn't it), then the object's own data
+    /// as `data-*` attributes.
     fn id_attr(&self, n: &Node) -> String {
         if self.anonymous {
             return String::new();
         }
-        let Some(id) = self.names.get(&n.id) else { return String::new() };
-        match n.name.as_deref() {
-            Some(name) if name != id => format!(" id=\"{}\" data-name=\"{}\"", xml_escape(id), xml_escape(name)),
-            _ => format!(" id=\"{}\"", xml_escape(id)),
+        let mut out = match (self.names.get(&n.id), n.name.as_deref()) {
+            (Some(id), Some(name)) if name != id => format!(" id=\"{}\" data-name=\"{}\"", xml_escape(id), xml_escape(name)),
+            (Some(id), _) => format!(" id=\"{}\"", xml_escape(id)),
+            (None, _) => String::new(),
+        };
+        for (k, v) in n.attrs.as_deref().map_or(&[][..], |a| a.data.as_slice()) {
+            // Names as XML takes them; ours (`name`, `vc-…`) are written by the export itself.
+            let valid = k.chars().all(|c| c.is_ascii_alphanumeric() || matches!(c, '-' | '_' | '.')) && k != "name" && !k.starts_with("vc-");
+            if valid && !k.is_empty() {
+                out.push_str(&format!(" data-{k}=\"{}\"", xml_escape(v)));
+            }
         }
+        out
     }
     fn matrix(&self, m: Affine) -> String {
         let c = m.as_coeffs();
@@ -1130,15 +1140,12 @@ impl Writer<'_> {
         std::mem::replace(&mut self.body, body)
     }
 
-    /// Props of a group (or layer): a knockout group is isolated, a hidden layer not displayed.
+    /// Props of a group (or layer): a knockout group is isolated, a hidden one not displayed.
     fn group_props(&self, n: &Node) -> Props {
         let mut p = css::transparency(n);
         if !n.isolate && n.knocks_out(self.knockout) {
             p.push(("isolation", "isolate".into()));
         }
-        if !n.visible {
-            p.push(("display", "none".into()));
-        }
         p
     }
 
@@ -1221,9 +1228,9 @@ impl Writer<'_> {
     }
 
     fn node_body(&mut self, n: &Node) {
-        // Hidden objects are left out; hidden layers too, unless the options keep them (hidden).
-        let kept = self.opts.hidden_layers && matches!(n.kind, NodeKind::Layer { template: false, .. });
-        if !(n.visible || kept) {
+        // Hidden layers and objects are left out, unless the options keep them (hidden). Template
+        // layers never print.
+        if !(n.visible || self.opts.hidden_layers) {
             return;
         }
         if has_raster(&n.appearance.effects) {
@@ -1357,7 +1364,7 @@ impl Writer<'_> {
                 (self.xf, self.instance_xf) = saved;
             }
             // Live blends/envelopes/meshes export their evaluated (expanded) form.
-            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) => {
+            NodeKind::Blend { .. } | NodeKind::Envelope { .. } | NodeKind::Mesh(_) | NodeKind::Repeat(_) | NodeKind::PlacedDocument(_) => {
                 let g = vectorcraft_effects::expand_live_deep(Some(self.doc), n);
                 self.share_images(&g);
                 self.node_body(&g);
@@ -1676,18 +1683,27 @@ impl Writer<'_> {
         }
         self.note_fonts(t, &lay);
         let lines = text_lines(t, &lay, self.opts.fewer_tspans);
-        // A tab starts a new chunk at its stop: only lines without tabs can be anchored.
-        let anchor = match t.para.justify {
-            Justify::Center => Some(("middle", 0.5)),
-            Justify::Right => Some(("end", 1.0)),
-            _ => None,
-        }
-        .filter(|_| !lines.iter().flatten().any(|s| s.brk));
+        // Each line is anchored as its paragraph is aligned. A tab starts a new chunk at its
+        // stop: lines with tabs are never anchored.
+        let anchors: Vec<Option<(&str, f64)>> = lines
+            .iter()
+            .map(|l| {
+                match t.para_at(l.para).justify {
+                    Justify::Center => Some(("middle", 0.5)),
+                    Justify::Right => Some(("end", 1.0)),
+                    _ => None,
+                }
+                .filter(|_| !l.segs.iter().any(|s| s.brk))
+            })
+            .collect();
+        // Every line anchored alike (the text's only paragraph style, typically): the <text>
+        // carries the anchor. Otherwise each anchored line is a <tspan> carrying its own.
+        let uniform = anchors.first().copied().filter(|a| a.is_some() && anchors.iter().all(|b| b == a)).flatten();
         // The <text> element's user space is text space.
         let space = (lay.bounds, Affine::IDENTITY);
-        let base = TextBase { props: self.char_props(&t.first_style(), space), space, anchored: anchor.is_some() };
+        let base = TextBase { props: self.char_props(&t.first_style(), space), space, anchored: uniform.is_some() };
         let mut props = base.props.clone();
-        if let Some((a, _)) = anchor {
+        if let Some((a, _)) = uniform {
             props.push(("text-anchor", a.into()));
         }
         props.extend(css::transparency(n));
@@ -1695,7 +1711,7 @@ impl Writer<'_> {
         let a = self.attrs(&props);
         let m = self.xf * t.xf;
         let tr = if m == Affine::IDENTITY { String::new() } else { format!(" transform=\"{}\"", self.matrix(m)) };
-        let starts: Vec<Option<(f64, f64)>> = lines.iter().map(|l| line_start(l, anchor.map(|a| a.1))).collect();
+        let starts: Vec<Option<(f64, f64)>> = lines.iter().zip(&anchors).map(|(l, a)| line_start(&l.segs, a.map(|a| a.1))).collect();
         // The `<text>` carries the first line's position too, so readers that place text by its
         // own x/y start where the first line does.
         let at = match starts.iter().flatten().next() {
@@ -1703,9 +1719,17 @@ impl Writer<'_> {
             None => String::new(),
         };
         let mut s = format!("<text{id}{tr}{at} xml:space=\"preserve\"{a}>");
-        for (line, start) in lines.iter().zip(starts) {
-            if let Some(start) = start {
-                self.text_line(&mut s, t, line, start, &base);
+        for ((line, start), anchor) in lines.iter().zip(starts).zip(&anchors) {
+            let Some(start) = start else { continue };
+            match anchor.filter(|_| uniform.is_none()) {
+                // A line anchored on its own: one positioned <tspan> with the anchor around it.
+                Some((a, _)) => {
+                    s.push_str(&format!("<tspan x=\"{}\" y=\"{}\" text-anchor=\"{a}\">", self.num(start.0), self.num(start.1)));
+                    let inner = TextBase { anchored: true, ..base.clone() };
+                    self.text_line(&mut s, t, &line.segs, start, &inner, false);
+                    s.push_str("</tspan>");
+                }
+                None => self.text_line(&mut s, t, &line.segs, start, &base, true),
             }
         }
         s.push_str("</text>");
@@ -1716,12 +1740,13 @@ impl Writer<'_> {
     /// (only the first of an anchored line). Fewer tspans: one positioned `<tspan>` per line with
     /// the style changes nested in it, positioned again only after tabs and justified word spaces.
     /// Baseline shifts are relative (`dy`), undone by the next segment that isn't shifted.
-    fn text_line(&mut self, s: &mut String, t: &TextObject, line: &[Segment], start: (f64, f64), base: &TextBase) {
-        let fewer = self.opts.fewer_tspans;
+    /// `positioned`: false when the caller already positioned the line (an outer `<tspan>`).
+    fn text_line(&mut self, s: &mut String, t: &TextObject, line: &[Segment], start: (f64, f64), base: &TextBase, positioned: bool) {
+        let fewer = self.opts.fewer_tspans && positioned;
         if fewer {
             s.push_str(&format!("<tspan x=\"{}\" y=\"{}\">", self.num(start.0), self.num(start.1)));
         }
-        let mut place = !fewer;
+        let mut place = !fewer && positioned;
         let mut first = true;
         // The baseline shift the current text position carries.
         let mut shift = 0.0;
@@ -1739,7 +1764,7 @@ impl Writer<'_> {
                 shift = st.baseline_shift;
             }
             // After a tab or a justified word space the next segment is placed.
-            place = seg.brk || (!fewer && !base.anchored);
+            place = seg.brk || (!fewer && !base.anchored && positioned);
             if (st.h_scale - st.v_scale).abs() > 1e-9 {
                 attrs.push_str(&format!(" textLength=\"{}\" lengthAdjust=\"spacingAndGlyphs\"", self.num(seg.advance)));
             }
@@ -1841,7 +1866,7 @@ impl Writer<'_> {
         let space = (lay.bounds, self.xf * t.xf);
         let base = self.char_props(&t.first_style(), space);
         let mut props = base.clone();
-        match t.para.justify {
+        match t.para_at(0).justify {
             Justify::Center | Justify::JustifyCenter => props.push(("text-anchor", "middle".into())),
             Justify::Right | Justify::JustifyRight => props.push(("text-anchor", "end".into())),
             _ => {}
@@ -1910,6 +1935,7 @@ fn has_raster(effects: &[vectorcraft_doc::Effect]) -> bool {
 }
 
 /// What the lines of one `<text>` share.
+#[derive(Clone)]
 struct TextBase {
     /// The `<text>` element's character properties, which each `<tspan>` differs from.
     props: Props,
@@ -1919,6 +1945,12 @@ struct TextBase {
     anchored: bool,
 }
 
+/// One laid-out line: its paragraph (index) and its segments.
+struct Line {
+    para: usize,
+    segs: Vec<Segment>,
+}
+
 /// Characters of one style on one line, written as one `<tspan>`.
 struct Segment {
     /// Index into `TextObject::runs`.
@@ -1937,11 +1969,12 @@ struct Segment {
 /// on justified lines, after each word space (unless `fewer`). The text comes from the clusters
 /// the layout placed: soft hyphens draw nothing, a line broken by hyphenation ends in `-`, all
 /// caps are upper case.
-fn text_lines(t: &TextObject, lay: &vectorcraft_text::TextLayout, fewer: bool) -> Vec<Vec<Segment>> {
+fn text_lines(t: &TextObject, lay: &vectorcraft_text::TextLayout, fewer: bool) -> Vec<Line> {
     let plain = t.plain_text();
-    let split_words = !fewer && !matches!(t.para.justify, Justify::Auto | Justify::Left | Justify::Center | Justify::Right);
     let mut lines = Vec::with_capacity(lay.lines.len());
     for line in &lay.lines {
+        let para = plain.as_bytes().get(..line.start).map_or(0, |b| b.iter().filter(|&&c| c == b'\n').count());
+        let split_words = !fewer && !matches!(t.para_at(para).justify, Justify::Auto | Justify::Left | Justify::Center | Justify::Right);
         let mut segs: Vec<Segment> = Vec::new();
         let mut cluster = None;
         let source = |g: &vectorcraft_text::PositionedGlyph| if g.len == 0 { "-" } else { plain.get(g.byte..g.byte + g.len).unwrap_or("") };
@@ -1976,7 +2009,7 @@ fn text_lines(t: &TextObject, lay: &vectorcraft_text::TextLayout, fewer: bool) -
         }
         segs.retain(|s| !s.text.is_empty());
         if !segs.is_empty() {
-            lines.push(segs);
+            lines.push(Line { para, segs });
         }
     }
     lines

crates/svg/src/import.rs

@@ -64,6 +64,7 @@ pub(crate) fn import(svg: &str, opts: &ImportOptions) -> Result<(Document, Vec<S
         blends: fx::blends(&xml),
         files,
         non_scaling: found.non_scaling,
+        data: found.data,
         screen: (kx * ky).sqrt(),
     };
     if im.files.nested_text() {
@@ -124,6 +125,7 @@ pub(crate) fn import(svg: &str, opts: &ImportOptions) -> Result<(Document, Vec<S
             }
             im.add_unclipped(&mut l, 0, std::mem::take(&mut loose));
             l.visible = !im.hidden.contains(g.id());
+            im.keep_data(g.id(), &mut l);
             im.doc.layers.push(Arc::new(l));
         }
     } else {
@@ -210,6 +212,8 @@ struct Importer {
     files: files::Files,
     /// Ids of the shapes whose strokes don't scale ([`vector_effect`]).
     non_scaling: HashSet<String>,
+    /// The `data-*` attributes of elements, by id ([`user_data`]).
+    data: HashMap<String, Vec<(String, String)>>,
     /// Points per screen pixel (the root's user unit before its `viewBox`): what a non-scaling
     /// stroke's width is measured in.
     screen: f64,
@@ -320,6 +324,8 @@ struct Found {
     files: files::Files,
     /// Ids of the shapes whose strokes don't scale ([`vector_effect`]).
     non_scaling: HashSet<String>,
+    /// The `data-*` attributes of elements, by id ([`user_data`]).
+    data: HashMap<String, Vec<(String, String)>>,
     warnings: Vec<String>,
 }
 
@@ -390,7 +396,7 @@ impl Edits {
 fn prepass<'s>(svg: &'s str, opts: &ImportOptions) -> (Cow<'s, str>, Found) {
     let mut found = Found::default();
     // (`:` for prefixed elements such as `<svg:image>`.)
-    if !["<a", "display", "<use", ":use", "<image", ":image", vector_effect::NON_SCALING].iter().any(|t| svg.contains(t)) {
+    if !["<a", "display", "<use", ":use", "<image", ":image", vector_effect::NON_SCALING, "data-"].iter().any(|t| svg.contains(t)) {
         return (svg.into(), found);
     }
     let Ok(xml) = roxmltree::Document::parse_with_options(svg, roxmltree::ParsingOptions { allow_dtd: true, ..Default::default() }) else {
@@ -403,6 +409,14 @@ fn prepass<'s>(svg: &'s str, opts: &ImportOptions) -> (Cow<'s, str>, Found) {
             found.links.insert(edits.id(svg, a), url.to_string());
         }
     }
+    if svg.contains("data-") {
+        for e in elements().filter(|e| OBJECT_ELEMENTS.contains(&e.tag_name().name())) {
+            let data = user_data(e);
+            if !data.is_empty() {
+                found.data.insert(edits.id(svg, e), data);
+            }
+        }
+    }
     let symbols: HashSet<&str> = elements().filter(|n| n.tag_name().name() == "symbol").filter_map(|n| n.attribute("id")).collect();
     for u in elements().filter(|n| n.tag_name().name() == "use") {
         if let Some(sym) = href(u).and_then(|h| h.strip_prefix('#')).filter(|s| symbols.contains(s)) {
@@ -456,6 +470,24 @@ fn tag_name_end(svg: &str, n: XNode) -> usize {
     svg.get(start + 1..).and_then(|s| s.find(|c: char| c.is_whitespace() || c == '/' || c == '>')).map_or(start + 2, |i| start + 1 + i)
 }
 
+/// The elements that become objects, whose `data-*` attributes are kept.
+const OBJECT_ELEMENTS: &[&str] = &["g", "a", "use", "path", "rect", "circle", "ellipse", "line", "polyline", "polygon", "image"];
+
+/// The most `data-*` attributes kept per element (the file is untrusted).
+const MAX_DATA: usize = 64;
+
+/// The `data-*` attributes of element `e`, in order, without the `data-` (ours, `data-name` and
+/// `data-vc-*`, aside).
+fn user_data(e: XNode) -> Vec<(String, String)> {
+    e.attributes()
+        .filter(|a| a.namespace().is_none())
+        .filter_map(|a| Some((a.name().strip_prefix("data-")?, a.value())))
+        .filter(|(k, _)| !k.is_empty() && *k != "name" && !k.starts_with("vc-"))
+        .take(MAX_DATA)
+        .map(|(k, v)| (k.to_string(), v.to_string()))
+        .collect()
+}
+
 /// Make `n` link to `url`, unless it links somewhere already (an inner link wins).
 fn link(n: &mut Node, url: &str) {
     if n.url().is_none() {
@@ -592,9 +624,18 @@ impl Importer {
         if self.hidden.contains(n.id()) {
             out.visible = false;
         }
+        self.keep_data(n.id(), &mut out);
         Some(out)
     }
 
+    /// Give `n` the `data-*` attributes of element `id`, unless it has data already (what an
+    /// inner element made of it keeps).
+    fn keep_data(&self, id: &str, n: &mut Node) {
+        if let Some(data) = self.data.get(id).filter(|_| n.attrs.as_ref().is_none_or(|a| a.data.is_empty())) {
+            n.edit_attrs(|a| a.data = data.clone());
+        }
+    }
+
     /// A gradient's stops, midpoints restored.
     fn stops(&self, g: &usvg::BaseGradient) -> Vec<GradientStop> {
         gradient_stops(g, self.midpoints.get(g.id()).map(Vec::as_slice))
@@ -1114,9 +1155,10 @@ impl Importer {
             std::mem::take(&mut self.uses),
             std::mem::take(&mut self.labels),
             std::mem::take(&mut self.non_scaling),
+            std::mem::take(&mut self.data),
         );
         let art = self.group_node(tree.root(), acc);
-        (self.links, self.hidden, self.uses, self.labels, self.non_scaling) = outer;
+        (self.links, self.hidden, self.uses, self.labels, self.non_scaling, self.data) = outer;
         art
     }
 }