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M12: accept Identity CJK Unicode mappings in accessibility checks (#3673)

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Treat predefined CJK CMaps and Adobe CID collections as alternative mapping routes. Resolve indirect metadata and reject unknown names and foreign registries without changing ToUnicode handling. Add synthetic checker and read-only automation regressions with red/green evidence.

Co-Authored-By: Claude Code <noreply@anthropic.com>
This commit is contained in:
Aman Mehtar
2026-10-20 23:29:13 +05:30
co-authored by Claude Code
parent 22bedbf2af
commit c7505930b8
9 changed files with 256 additions and 12 deletions
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parity/acrobat-features.toml
+2 -2
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@@ -8600,8 +8600,8 @@ milestone = "M12"
status = "shipped"
commands = ["a11y.check"]
tools = ["accessibility_check"]
evidence = ["crates/a11y/src/tests.rs::scans_identity_fonts_and_long_documents"]
notes = "rule character-encoding: ToUnicode, a standard encoding, or a predefined CJK collection; each font once"
evidence = ["crates/a11y/src/tests.rs::scans_identity_fonts_and_long_documents", "crates/a11y/src/tests.rs::character_encoding_accepts_identity_cjk_collections", "crates/a11y/src/tests.rs::character_encoding_accepts_predefined_cmaps_without_a_known_collection", "crates/a11y/src/tests.rs::character_encoding_rejects_unknown_cmaps_and_foreign_collections", "crates/a11y/src/tests.rs::character_encoding_resolves_indirect_cid_metadata", "crates/automation/tests/automation.rs::accessibility_character_encoding_accepts_identity_cjk_through_tools"]
notes = "rule character-encoding: ToUnicode, a standard encoding, a predefined non-Identity CJK CMap, or Adobe GB1/CNS1/Japan1/Korea1/KR; Identity-H/V accepted for those collections (#3673), indirect metadata resolved and unknown CMaps/foreign registries refused; each font once. Font-level declarations only: ToUnicode contents and every used glyph are not validated; embedded-font extraction gaps remain separate."
[[feature]]
id = "a11y.rule-tagged-multimedia"