* craft-svg paths: a shape carries the name of its Inkscape layer
Shape::layer is the inkscape:label (else the id) of the innermost
<g inkscape:groupmode="layer"> around the element, so a CAD or cutter
import can keep the drawing's layers.
* craft-svg guard: bound attributes per element and over the document; find entities holding markup
too_wide is the attribute check of storytold/figcraft#2251: an XML
reader checks each attribute against the earlier ones on its element,
so an element with millions of them is quadratic work before any other
limit applies. entity_holds_markup lets a caller refuse a document type
whose entities become elements, as PhotoCraft does.
* craft-svg: feature `tree`, usvg behind one bounded entry point
usvg 0.48.1 (Apache-2.0 OR MIT), re-exported as craft_svg::tree::usvg,
so every app parses with one version and one set of checks:
tree::parse runs svgz, the entity, attribute and nesting guards, the
reference-chain height (VectorCraft's depth::height, on this crate's
cascade), then usvg. tree::image_resolver bounds embedded SVGs
(FigCraft's budget::resolver). tree::draw bounds what drawing a tree
with resvg allocates (PhotoCraft's svg/limits.rs).
Part of #778 and #789.
crates/svg-paths becomes crates/svg (package craft-svg); the geometry
reader is craft_svg::paths (was the crate root), color and write keep
their names. craft-svg-paths stays as a crate that re-exports them.
New, merged from the copies the apps keep:
- sniff: is_svg, is_svgz
- svgz: bounded gunzip, UTF-8/UTF-16/ISO 8859-1 decoding, compression
- guard: element nesting and entity expansion measured on the text
(VectorCraft's import/depth.rs text pass and entities.rs)
paths: a smooth segment with no control point to reflect starts at the
current point (S after a quadratic or a close, T after a cubic or a
close), and a relative root width or height (100%, 2em) counts as
absent instead of failing the import.
Part of #778 and #789.
Dylan M. Taylor