Merge pull request #2047 from StrajnarFilip/claude/fix-1906-minimised-control

M8: a minimised window under Wayland answers control requests (#1906)

docs/control-protocol.md

@@ -59,8 +59,10 @@ queue. A screenshot settles on three completed, presented UI frames (a discarded
 not count), then is issued, and expires once at its 60 s deadline if no paint arrives. `window.new`
 remains an error at once (`window 0 is minimised or hidden: …`) instead of waiting for the window
 to show; `ui.render` draws the document without it. Under Wayland the app can't tell that its
-window is minimised: where the compositor then stops drawing it, a request waits for the window
-and gets the 60 s timeout error. The browser's shared eframe runner does not implement
+window is minimised, and the compositor stops asking it to draw: a window that draws no frame for
+0.2 s while a request waits for it is treated as hidden, so the requests that act on the app's
+state are answered without a frame (about half a second each), while `ui.screenshot` and
+`ui.input` keep waiting for one. The browser's shared eframe runner does not implement
 `RequestPaintWhileHidden` yet, so hidden-tab screenshots and injected input are unqualified there.
 
 Coordinates are page units, y down. `x`/`y` in `node.set`/`node.create` are relative to the parent

docs/hardware-parity.md

@@ -1,6 +1,6 @@
 # Hardware and platform parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (images copied in other apps paste in the browser (#492); text reads only the fallback fonts it draws with; `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); a batch keeps one undo snapshot, not one per step (#1099); one depth cap bounds a whole render, pattern sources included, and render threads get 8 MiB stacks (#1082); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); macOS: the Quit menu and ⌘Q ask about unsaved changes (#857); egui/eframe 0.37 dependency migration; hidden-window screenshot deadlines; zoom previews; hidden windows answer control requests; macOS file opening, the Windows start-up message, Linux packaging; copy and paste in the browser; Windows QA pass; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; pen pressure for the Pencil and brushes on Windows and from browser styluses; macOS: quitting ends the process once everything is kept, avoiding the Touch Bar teardown crash (#781); Linux and BSD clipboard: images under Wayland, reads time out; minimised windows under Wayland; window controls on Wayland without server decorations; canvas textures on device pixels) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-06 · **Change:** patch (under Wayland a minimised window answers control and MCP requests in about half a second instead of timing out after 60 s (#1906); images copied in other apps paste in the browser (#492); text reads only the fallback fonts it draws with; `doc.list` gives AI agents and plugins the open files' names, not their paths (#1117); a batch keeps one undo snapshot, not one per step (#1099); one depth cap bounds a whole render, pattern sources included, and render threads get 8 MiB stacks (#1082); in the browser an internal error that stops the page keeps its unsaved files, which open again on reload (#1123); the portable Windows zip keeps its settings, recovery copies and plugins in `config\` beside the executable, starting with an installed copy's preferences; the window starts on other graphics when its first ones fail before the first frame: Direct3D 12 compiles with FXC and no device compiles wgpu's indirect-validation shaders, then Vulkan, OpenGL and lower requirements on the power-saving GPU (#965, #1438); large images on the canvas draw from a smaller copy, so two 16k images no longer lag (#1483); macOS: the Quit menu and ⌘Q ask about unsaved changes (#857); egui/eframe 0.37 dependency migration; hidden-window screenshot deadlines; zoom previews; hidden windows answer control requests; macOS file opening, the Windows start-up message, Linux packaging; copy and paste in the browser; Windows QA pass; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; pen pressure for the Pencil and brushes on Windows and from browser styluses; macOS: quitting ends the process once everything is kept, avoiding the Touch Bar teardown crash (#781); Linux and BSD clipboard: images under Wayland, reads time out; minimised windows under Wayland; window controls on Wayland without server decorations; canvas textures on device pixels) · **Target:** Figma Design (desktop app 126.10.7)
 
 How FigCraft uses hardware and which platforms it runs on, against Figma. Figma's desktop app is
 Electron with a GPU helper process; its canvas renders on the GPU (WebGL, with WebGPU rolling out
@@ -41,7 +41,7 @@ Nothing has been timed against Figma on the same document (needs `.fig` import).
 |---|---|---|---|
 | macOS | desktop app (Intel and Apple silicon) | universal `.dmg`, signed and notarized (v0.2.0) | where nearly all QA happens. Quitting ends the process once the preferences, recovery copies and live sessions are taken care of: the window's teardown crashed on Macs with a Touch Bar (#781); the Quit menu and ⌘Q ask about unsaved changes like the main window's close button (#857), and like it close the main window only: with several windows open, each quit closes one; a quit that never asked — killed or crashed — still leaves recovery copies for the next start |
 | Windows x64 / arm64 | desktop app | `.msi` and portable zip for x64, x86 and arm64 | built in CI; Windows: QA pass done 2026-10-11, findings in PR. The portable zip keeps its settings in `config\` beside `figcraft.exe` (a `portable` file there), taking an installed copy's preferences on its first start (#1320). Draws with Direct3D 12 (FXC shaders) or OpenGL; when the graphics fail before the first frame it starts again on Vulkan, then OpenGL, then the power-saving GPU with lower limits (#965) |
-| Linux | none (browser only) | AppImage, `.deb`, `.rpm`, Flatpak, tarball, x86_64 and aarch64; riscv64 tarball | CI tests run here. Clipboard (also the BSDs): reads run on a helper thread that gives up after 2 s, and images copied in other apps paste under Wayland through the data-control protocol (#693). Under Wayland the app can't tell its window is minimised, so control requests that need a drawn frame may still wait there (#720). None of this run on a Linux desktop here. On a Wayland compositor without server-side decorations (GNOME) the window gets winit's Adwaita controls (#592: checked by its author in a GNOME Wayland session; KDE not run) |
+| Linux | none (browser only) | AppImage, `.deb`, `.rpm`, Flatpak, tarball, x86_64 and aarch64; riscv64 tarball | CI tests run here. Clipboard (also the BSDs): reads run on a helper thread that gives up after 2 s, and images copied in other apps paste under Wayland through the data-control protocol (#693). Under Wayland the app can't tell its window is minimised: a window that draws nothing for 0.2 s while a control request waits for it answers the request as a hidden window does (about half a second each, #1906), and only requests that need a drawn frame (screenshots, input) wait there (#720). None of this run on a Linux desktop here. On a Wayland compositor without server-side decorations (GNOME) the window gets winit's Adwaita controls (#592: checked by its author in a GNOME Wayland session; KDE not run) |
 | FreeBSD | none | tarball | |
 | Web | primary (figma.com) | `figcraft-web` (WASM, WebGPU/WebGL2), web zip | no accessibility tree; file access through the browser; copy and paste through the system clipboard (copies written from the copy event, pastes read from the paste event, its text or an image copied in another app); an internal error stops the page (a panic can't be caught there), but its unsaved files are kept in the page's local storage (about 5 MB) and open again on reload (#1123) |
 | iOS / Android | apps: view, comment, mirror prototypes | none (the web build is not touch-first) | 20–40 h for a viewer |
@@ -50,6 +50,7 @@ Nothing has been timed against Figma on the same document (needs `.fig` import).
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-06 | patch | M8, #1906: under Wayland (seen on GNOME and KDE Plasma) a minimised FigCraft window still reports itself visible and the compositor stops asking it to draw, so every control or attached-MCP request waited for a frame and timed out after 60 s ("it was not applied"), though eframe kept running the app's logic. `control::background` now treats a window that drew no frame for `NOT_DRAWING_AFTER` (0.2 s) while a request waited for it as hidden: state-only requests are answered from the logic passes (0.54 s each, measured on GNOME Wayland; they took 13.7 s or timed out before), the wait starts again when the window draws, and screenshots and `ui.input` still wait for a frame. Test: `idle_tests::a_window_that_stopped_drawing_answers_from_its_logic_passes` |
 | 2026-10-31 | minor | M1, #492: Web row: the browser pastes images copied in other apps, read from the paste event under the same limits as the desktop. Numbers unchanged. |
 | 2026-10-30 | minor | M8: text reads only the fallback fonts it draws with. Each fallback family reads the face nearest a run's style, not all of them (Noto Sans CJK is seven files of 16–20 MB); families naming the faces of one file share its bytes; and the faces are worked out once per style until fonts change, not for every text laid out. First text laid out on a Linux machine with Noto Sans CJK, DejaVu Sans and Inter: 41 files (265 MiB, kept in memory) and 41 faces parsed → 3 files (20 MiB) and 4 faces; fallback lookups per text laid out ~45 µs → 0.2 µs. Tests: `fontdb_fallback_tests`. Numbers unchanged |
 | 2026-10-30 | minor | M8, #1117: AI agents and plugins no longer learn where the open files are on disk from `doc.list`. Numbers unchanged. |

docs/mcp.md

@@ -42,7 +42,8 @@ replaced then, so a pause between calls is not an error.
 
 The app keeps answering while its window is minimised or covered by other windows (see
 `docs/control-protocol.md`): edits, inspection (`inspect_ui` too), pointer, key and text input and
-renders work as usual (minimised, each request to the app takes up to about 0.1 s). Only a capture
+renders work as usual (minimised, each request to the app takes up to about 0.1 s; under Wayland,
+which can't report a minimised window, about half a second). Only a capture
 of the window itself (`screenshot` with `window`) needs it on screen: it is then an error at once;
 `screenshot` without `window` renders the document instead.
 

docs/target-app-parity.md

@@ -643,8 +643,9 @@ Carried over from the ROADMAP's "Shipped so far" (2026-10-10). The test count th
   `figcraft-cli mcp` and the desktop app, #715). A minimised or covered window answers every
   request that acts on the app's state without drawing (about 100 ms each on Windows), and the
   ones that need a drawn frame (`ui.screenshot`, `ui.input`, `window.new`) fail at once instead of
-  waiting 60 s (#720; not tested on macOS, and under Wayland a minimised window can't be told
-  apart).
+  waiting 60 s (#720; not tested on macOS). Under Wayland a minimised window can't be told apart,
+  so a window that draws nothing for 0.2 s while a request waits is answered as a hidden one
+  (about half a second a request, #1906).
 - **Tests:** 963 `#[test]` functions (2026-10-10) including junk-parameter sweeps over every command (and every vector-edit command while editing), importer fuzzing and render regressions.
 
 ## Revision history