b9380a8a03
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The strut half-leading calculation in apply_vertical_align used the effective line height (inflated by tall inline-block elements like images) instead of the CSS computed line-height. For a line with a 76px image and CSS line-height: 15px, the strut got half_leading = (76 - font_height)/2 ≈ 30, inflating descent by ~30px. This caused floated containers to overflow their parents, leaking through shared BFC float contexts and displacing sibling floats. Fixes: pass CSS computed line-height separately for strut calculation; also pass parent font family/weight/style for accurate strut metrics. Adds float=left/right annotations to layout tree dumps for debugging. 32 WPT tests promoted from known_fail to pass. BMOW page sidebar moves from x=73 to x=829 (correct float:right), content from y=4375 to y=114. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
33 lines
1.2 KiB
Plaintext
33 lines
1.2 KiB
Plaintext
LayoutBox node=#1 tag=html box=block
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content: (0, 0, 800, 85.2)
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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=#8 tag=body box=block
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content: (8, 8, 784, 69.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 8 8 8 8
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LayoutBox node=#10 tag=div box=block float=left
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content: (8, 8, 100, 50)
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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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inline_context: 0 lines, height=0, max_width=0
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LayoutBox node=#12 tag=div box=block
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content: (8, 58, 784, 19.199997)
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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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inline_context: 1 lines, height=19.199997, max_width=82.87812
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line[0]: rect=(8, 58, 82.87812, 19.2) fragments=3
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frag[0]: rect=(8, 59.6, 33.632893, 16) text="Below" start=false end=false
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frag[1]: rect=(44.687225, 59.6, 18.126286, 16) text="the" start=false end=false
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frag[2]: rect=(65.86784, 59.6, 25.010277, 16) text="float" start=false end=false
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LayoutBox node=#13 tag=anonymous box=anon
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content: (0, 0, 82.87811, 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: "Below the float"
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