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* feat(a11y): auto-tag Apply tags headings by size and weight Apply now chooses H1-H6 or P per text object instead of P for all. The body style is the half-point size showing the most characters (bold when most of those are bold). A short object (at most 3 lines, 200 characters, with a letter) is a heading when it is 1.15x the body, or bold at 0.9x the body over a regular body in at most 2 lines. Heading styles rank across the document, larger and bolder first, capped at H6, and a level never skips past the one before it so heading-nesting passes. Size is Tf x Tm x CTM with q/Q tracked; bold is Metrics.bold. Text in render mode 3 (an OCR layer) is not counted. Font metrics are measured once per font object per document, at most 256 fonts. AutoTagResult gains a headings count. Parity, gaps, roadmap and the apply tool's note say headings are tagged. Fixes #7062. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(a11y): rank heading styles by map and skip clip-only text Look up each heading style's rank in a map built once after sorting, so ranking is linear in the number of text objects. Text in render mode 7 (clip only) paints nothing, so it is excluded from heading evidence like mode 3. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: KenM76 <KenM76> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
pdfcraft-a11y
Layer L4: accessibility (execution plan M12.3). Today: the Accessibility Checker's full check.
let report = check(&doc, &Options::default()); // 31 of 32 rules (colour contrast off)
let html = report_html(&report, "file.pdf", "2026-10-02", "en", &in_english); // or an interface's words
- 32 rules in 7 categories, as in Acrobat's full check: Document (permission flag, image-only, tagged, reading order, language, title, bookmarks, colour contrast), Page Content (tagged content, tagged annotations, tab order, character encoding, tagged multimedia, and four manual checks), Forms (tagged fields, descriptions), Alternate Text (figures, nested, associated with content, hides annotation, other elements), Tables (rows, cells, headers, regularity with row/column spans, summary), Lists (items, Lbl/LBody) and Headings (nesting).
- Each result is Passed, Failed (with findings and pages), Needs manual check, or Skipped.
- Content checks walk the page content streams (and form XObjects) tracking marked
content: painting outside MCID-marked or
/Artifactcontent is untagged. - Character encoding accepts a predefined non-Identity CJK CMap or an Adobe CJK
character collection (
GB1,CNS1,Japan1,Korea1,KR), including Identity-H/V. Unknown CMaps and foreign registries do not establish that route. This is a font-level declaration check, not validation of every ToUnicode entry or used glyph. - Structure checks read the structure tree through the role map; table regularity counts
ColSpan/RowSpanattributes. - The report is a self-contained HTML page. Fixes that edit the document (language, title, tab
order) live in the engine (
Document::accessibility_fix).
Not yet: autotagging, the Tags/Order/Content panels, the Reading Order tool (M12.1–M12.2).