* EPUB: Split Document in a paragraph style's Export Tagging
* EPUB: Split Document as a document setting (off, one style, or export tags)
The document stores EPUB Export Options › Split Document (DocSettings.epub_split):
off (one content file, the default), a single paragraph style, or the
paragraph styles' Export Tagging › Split Document flags. document.epubSplit sets
it as one undo step; file.exportEpub takes a split that overrides it for one
export. A Style setting follows a renamed style and a deleted style's
replacement. IDML reads and writes EPubExportPreference BreakDocument and
ParagraphStyleName. A split before a list item or preformatted line closes the
open list or block first, so each content file is balanced.
* EPUB Export Options dialog with Split Document before Export EPUB
File › Export EPUB… opens EPUB Export Options, seeded from the document's
Split Document setting: a Split Document checkbox with Single Paragraph Style
(and its style) or Based on Paragraph Style Export Tags. OK stores a changed
setting through document.epubSplit, then continues to the save dialog; Cancel
does nothing. app.exportEpub with a path skips the dialog. Docs and the
progress log describe the setting.
* EPUB: the navigation test exports one content file with Split Document off
* EPUB export from the menu passes its options (cover, split) to the engine
* EPUB: Split Document on a style's EPUB tag map counts when the style says false; a caller's cover: false stays
Graphic literals (cli perf, doc assets/item, engine datamerge/export/file/links/mathexpr/media/table/sample, epub, format, pdf, pptx, render, tools, ui-egui properties, and tests): name the branch's clip and wrap (#561, #381) and the PR's fill.
crates/doc/src/item.rs: Graphic keeps wrap and gains fill.
crates/idml/src/import.rs: read the image swatch, then the branch's styled FrameFittingOption lookup; the graphic keeps its wrap.
crates/idml/src/tests/assets.rs: keep both new tests.
crates/render/src/lib.rs: keep #362's crop-box sizing of placed PDFs and colour the resulting pixmap.
crates/render/tests/colorize.rs, crates/epub/tests/grouped_reading_order.rs, crates/compose/src/tests.rs: literals name the branch's Asset and Graphic fields.
crates/pdf/src/export.rs: the soft mask interpolates by the standard's raster mode (the branch has no per-exporter interpolate switch).
docs/gaps.md, docs/target-app-parity.md: status lines list both sides' changes; gap text keeps the clipping-path items and adds the image swatch.
nav.xhtml had one entry per placed story, labelled with its first
paragraph (body text too), and always the title "Contents".
- Headings (h1-h6) get an id in the EPUB, and the navigation lists the
h1-h3 headings of the stories in reading order, nested by level and
linked to them. A document without headings keeps one entry per
story (its first paragraph).
- The navigation's title follows the language (Inhoud, Inhalt, Table
des matières, Índice, Indice, 目次, 目录; Contents otherwise), and
file.exportEpub takes tocTitle to set it.
Fixes#769Fixes#770
aiongg