Martín Lucas Golini be17af3da0 Fix CSS selector backtracking, union style dependencies and bind libeepp calls directly ...

Selector matching (Selectors Level 4 §17.3):
- Retry other candidates for descendant and general-sibling combinators
  instead of rejecting after the first failed path. Checkpoints use a
  fixed array of one entry per checkpoint-saving rule (16 on the stack,
  32/64 in out-of-line helpers, heap beyond), with failure pruning so
  exhausted searches stop early.
- Handle <html> as a style-sheet parent boundary whose siblings stay
  visible: failed parent steps at an <html> with element siblings retry
  instead of rejecting, and a ~ candidate that is such an <html> resumes
  its search without a checkpoint.
- Reject the subject before sizing storage for long selectors.

Style dependencies:
- getRelatedElements() now returns the union of tracked elements over
  every matching path, so state changes on any eligible ancestor or
  sibling restyle the subject. Strategies are chosen per selector:
  immediate exit, fixed-prefix walk, single candidate scan (with a
  shared suffix for ~ candidates), an ancestor-path DP, and a memoized
  collector. All are linear and allocation-free for common selectors.

Other fixes:
- Exclude raw text nodes from matched author styles; their widget
  backgrounds painted over glyphs drawn by the parent rich text.
- Report widget ids from getPropertyString() so [id=...] selectors match.
- Add StyleSheetSelectorRule::hasAnyPseudoClasses() and
  UIStyle::getRelatedWidgets() (inline, ABI-compatible additions).

Build:
- Link libeepp with -Wl,-Bsymbolic-functions on Linux, BSD and Haiku so
  internal calls skip the PLT (11,314 -> 619 PLT entries). Measured:
  Markdown load -25%, selector matching -11%, attribute matching -14%.

Tests and benchmarks:
- Regression tests for backtracking, <html> boundaries, subscription
  union and cleanup, operation-count bounds, long selectors and id
  attribute selectors, plus a differential test against an exhaustive
  reference matcher.
- Add Benchmark.CSSSelectorCombinators and Benchmark.CSSStateDependencies
  and create all benchmark windows hidden.

2026-10-07 00:03:22 -03:00

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eepp

Fix CSS selector backtracking, union style dependencies and bind libeepp calls directly

2026-10-07 00:03:22 -03:00