Share duplicate file data while keeping distinct link paths independent, and leave unused assets out of saved documents.
Validation: all six cargo xtask ci gates passed on the merge candidate; 1,170 native tests passed and all 15 WASM packages checked. Independent regression checks cover updates, relinking, embedding, undo and save/reopen.
Task: #420
Reuse packaged-link candidates for embedded IDML images and native files.
Resolve missing original paths beside the opened document, retaining the
embedded image bytes and any original link that still exists. Bound path
lookup allocations and cover actual package relocation through commands.
Make existing data-merge test path assertions portable to Windows.
Co-authored-by: Codex <noreply@openai.com>
A character the applied font lacks is drawn as that font's missing-glyph
box (its .notdef, gid 0), on screen and in PDF, and Preflight lists the
characters by font ("Missing glyphs in <family> <style>: …", an error,
at most 20 named). A .notdef without an outline is drawn as a hollow box
across its advance, so a missing character never disappears. PDF draws
.notdef glyphs as paths, which PDF/A and PDF/UA accept. Kenten marks are
set in their text's font the same way.
The document setting Draw Missing Glyphs from Fallback Fonts
(DocSettings::glyph_fallback; Preferences > Composition,
document.preferences {glyphFallback}, undoable) draws them from fallback
fonts instead (the language-aware chains, then any font; kenten marks
from a fallback font, else a bullet). It is off in new documents and
IDML imports and on in files saved before it existed, which keep
drawing as they did. A missing font's substitute always uses fallback
fonts. The composition cache's signature includes the setting. Tests
whose Arabic comes from a fallback font turn the setting on.
Composition draws the characters a named font lacks with fallback faces
(the language's CJK chain, then the generic fallbacks). Package now also
copies their font files: it collects the distinct faces of the visible
glyphs of every composed story (table cells and footnotes included) and
copies those that aren't a named font's face by the same rules (restricted
licence listed, bundled included with DesignCraft, no file noted, each file
once). The report lists them under Fallback fonts.
The fonts in a document's Document Fonts folder are registered under a
font scope that the document holds while it is open (Document::font_scope,
runtime only; DocState keeps the scope alive and closes it when the last
copy of the state goes: file.close, closing a tab, revert, a book
chapter's export, the session ending). Composition, preflight, font.list,
Package and the font menus, Glyphs panel and previews look fonts up
through FontDb::scoped(scope): the document's own faces first, then the
shared ones. Other open documents don't see them, and two documents with
fonts of the same name each set text in their own. Composite fonts'
member fonts and the fallback for kenten marks are looked up the same
way.
Font files stay in memory for the session (FaceRef keeps faces for the
process); a document opened again reuses the faces of its unchanged files
(same path, length and modification time) instead of reading them again.
The composition cache's signature includes the scope; the word cache and
the outline and PDF font caches are keyed by face. Variable font
instances are kept per base face.
A family's installed faces join the shared fonts all at once, and a
face two lookups load at the same time is kept once, so a parallel
fallback lookup never takes a family's bold before its regular has
loaded.
Opening a .designcraft or .idml file from disk (file.open, file.openIdml,
book chapters, recovered documents) loads the fonts in the "Document
Fonts" folder beside it. Their faces come before installed faces of the
same family and style. The files are untrusted: at most 200 are read,
256 MB each (full CJK collections fit) and 512 MB in all; files over a
limit by their listed length are skipped unread, and damaged, oversized
and surplus files are listed in the open result's warnings. Document fonts stay
loaded for the session (the font database is process-wide).
Faces record their source (bundled, installed file, document file,
memory); font.list reports it. File > Package copies the font files the
document uses into the package's Document Fonts folder unless OS/2
fsType restricts the licence, and the report says which fonts weren't
copied and why.
Brandon Thomas