20e241bd03
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Self-collapsing elements (zero height, no padding/border, no BFC, no line boxes) now have their top and bottom margins collapse together, and child margins propagate through parents with auto height and no bottom padding/border. This replaces the pairwise collapse_margins() function with a MarginSet accumulator that tracks max positive and min negative margins separately, correctly resolving chains of 4+ margins. Key changes: - Add is_self_collapsing() post-layout predicate and gather_all_margins() - Add gather_margin_bottom() for bottom margin propagation with a guard against propagation when max-height constrains the parent - Replace prev_margin_bottom with MarginSet-based pending_margins in the sibling layout loop - Handle clearance + self-collapsing interaction correctly Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
63 lines
2.2 KiB
Plaintext
63 lines
2.2 KiB
Plaintext
LayoutBox node=#2 tag=html box=block
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content: (0, 0, 800, 102.4)
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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=#10 tag=body box=block
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content: (0, 0, 800, 86.4)
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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=#12 tag=div box=block
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content: (0, 0, 800, 70.4)
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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=#13 tag=(anonymous-block) box=block
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content: (0, 0, 800, 19.2)
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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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inline_context: 1 lines, height=19.2, max_width=51.571217
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line[0]: rect=(0, 0, 51.571217, 19.2) fragments=2
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frag[0]: rect=(0, 1.6000004, 24.14097, 16) text="blue" start=true end=false
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frag[1]: rect=(27.195301, 1.6000004, 21.321585, 16) text="text" start=false end=true
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LayoutBox node=#13 tag=anonymous box=anon
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content: (0, 0, 3.0543318, 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: " "
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LayoutBox node=#14 tag=span box=inline
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content: (0, 0, 0, 0)
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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=#15 tag=anonymous box=anon
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content: (0, 0, 48.516884, 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: "blue text"
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LayoutBox node=#16 tag=anonymous box=anon
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content: (0, 0, 3.0543318, 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: " "
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LayoutBox node=#17 tag=p box=block
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content: (0, 35.2, 800, 19.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 16 0 16 0
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inline_context: 1 lines, height=19.2, max_width=43.077827
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line[0]: rect=(0, 35.2, 43.077827, 19.2) fragments=2
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frag[0]: rect=(0, 36.800003, 18.701908, 16) text="red" start=false end=false
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frag[1]: rect=(21.75624, 36.800003, 21.321585, 16) text="text" start=false end=false
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LayoutBox node=#18 tag=anonymous box=anon
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content: (0, 0, 43.077824, 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: "red text"
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