56453a5677
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Extract width and span metadata from <col>/<colgroup> DOM elements and apply them as column width hints during table layout. This enables authors to declaratively set column widths via HTML attributes or CSS without relying on cell content. Key changes: - UA stylesheet: col/colgroup get display:none (metadata-only, no boxes) - HTML attrs: dedicated width-only extraction for col/colgroup elements - ColumnInfo struct on LayoutBox stores per-column width hints - DOM walker extracts col/colgroup metadata with span expansion and colgroup-to-col width inheritance (CSS 2.1 §17.3) - Width hints integrated into both intrinsic and available-width table sizing algorithms with correct fixed-before-percentage ordering - HTML parser: implicit colgroup closing by tr/tbody/thead/tfoot Deferred: column backgrounds, visibility:collapse, column borders in collapsed border model. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
110 lines
4.2 KiB
Plaintext
110 lines
4.2 KiB
Plaintext
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content: (0, 0, 800, 86.4)
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margin: 0 0 0 0
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LayoutBox node=#10 tag=body box=block
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content: (8, 8, 784, 70.4)
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border: 0 0 0 0
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margin: 8 8 8 8
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LayoutBox node=#12 tag=table box=table
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content: (9, 9, 327.42438, 68.4)
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padding: 0 0 0 0
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border: 1 1 1 1
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margin: 0 0 0 0
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LayoutBox node=#20 tag=tr box=table-row
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content: (9, 11, 327.42438, 31.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 0 0 0 0
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LayoutBox node=#22 tag=td box=table-cell
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content: (17, 17, 188, 19.2)
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padding: 5 5 5 5
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border: 1 1 1 1
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margin: 0 0 0 0
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content: (0, 17, 7.506608, 16)
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padding: 0 0 0 0
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margin: 0 0 0 0
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text: "A"
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LayoutBox node=#25 tag=td box=table-cell
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content: (219, 17, 88, 19.2)
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padding: 5 5 5 5
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margin: 0 0 0 0
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content: (0, 17, 7.6358294, 16)
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margin: 0 0 0 0
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text: "B"
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LayoutBox node=#28 tag=td box=table-cell
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content: (321, 17, 7.4243755, 19.2)
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padding: 5 5 5 5
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content: (0, 17, 7.424376, 16)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 0 0 0 0
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text: "C"
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LayoutBox node=#32 tag=tr box=table-row
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content: (9, 44.2, 327.42438, 31.2)
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padding: 0 0 0 0
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margin: 0 0 0 0
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content: (17, 50.2, 188, 19.2)
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content: (0, 50.2, 8.5756235, 16)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 0 0 0 0
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text: "D"
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LayoutBox node=#37 tag=td box=table-cell
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content: (219, 50.2, 88, 19.2)
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padding: 5 5 5 5
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border: 1 1 1 1
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margin: 0 0 0 0
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content: (0, 50.2, 6.531571, 16)
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padding: 0 0 0 0
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margin: 0 0 0 0
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text: "E"
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LayoutBox node=#40 tag=td box=table-cell
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content: (321, 50.2, 7.4243755, 19.2)
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content: (0, 50.2, 6.096916, 16)
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text: "F"
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