26bdd255c8
Implement header row detection for tables using two signals: 1. Bold font detection (fully implemented) 2. StructTree TH detection (stub pending MCID tracking) Bold detection: - is_bold_font(): detects bold fonts from PostScript name patterns - is_cell_bold(): checks if all non-whitespace content in a cell is bold - is_bold_header_row(): validates rows with >=2 bold cells - count_header_rows(): counts contiguous bold headers from top - Cell::mark_header_rows(): sets is_header_row flag on cells TH detection (stub): - is_th_header_row(): placeholder for StructTree TH detection Requires MCID tracking on TableSpan (future work) Will use ParentTree to map MCIDs to StructElems Will verify TR > TH chain structure Combined detection: - is_header_row(): combines bold and TH signals - Bold wins on conflict per body data design principle Documentation: - Updated table-structure-reconstruction.md with full header detection spec - Documented implemented vs pending signals - Added implementation notes for TH detection Tests: - 45 tests covering all bold detection scenarios - Tests for multi-row headers (contiguous from top) - Tests for single-cell row exclusion - Tests for empty/whitespace cell handling - Placeholder tests for TH detection Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> |
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| research-index.md | ||