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>
70 lines
2.7 KiB
Plaintext
70 lines
2.7 KiB
Plaintext
LayoutBox node=#1 tag=html box=block
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content: (0, 0, 800, 137.6)
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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=#9 tag=body box=block
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content: (0, 0, 800, 127.600006)
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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=#11 tag=div box=block
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content: (0, 1, 800, 62.4)
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padding: 0 0 0 0
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border: 1 0 1 0
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margin: 0 0 0 0
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LayoutBox node=#13 tag=ul box=block
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content: (0, 13, 800, 38.4)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 12 0 12 0
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LayoutBox node=#15 tag=li box=block
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content: (0, 13, 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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marker: "•"
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inline_context: 1 lines, height=19.2, max_width=32.79883
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line[0]: rect=(0, 13, 32.79883, 19.2) fragments=2
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frag[0]: rect=(0, 14.6, 23.024963, 16) text="Test" start=false end=false
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frag[1]: rect=(26.079296, 14.6, 6.71953, 16) text="1" start=false end=false
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LayoutBox node=#16 tag=anonymous box=anon
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content: (0, 0, 32.79883, 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: "Test 1"
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LayoutBox node=#18 tag=li box=block
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content: (0, 32.2, 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: 0 0 0 0
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marker: "•"
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inline_context: 1 lines, height=19.2, max_width=32.79883
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line[0]: rect=(0, 32.2, 32.79883, 19.2) fragments=2
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frag[0]: rect=(0, 33.800003, 23.024963, 16) text="Test" start=false end=false
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frag[1]: rect=(26.079296, 33.800003, 6.71953, 16) text="2" start=false end=false
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LayoutBox node=#19 tag=anonymous box=anon
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content: (0, 0, 32.79883, 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: "Test 2"
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LayoutBox node=#23 tag=div box=block
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content: (20, 86.4, 760, 19.200005)
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padding: 10 10 10 10
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border: 2 0 2 0
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margin: 10 10 10 10
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inline_context: 1 lines, height=19.200005, max_width=150.35535
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line[0]: rect=(20, 86.4, 150.35535, 19.2) fragments=4
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frag[0]: rect=(20, 88, 41.903084, 16) text="Dashed" start=false end=false
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frag[1]: rect=(64.95741, 88, 21.720999, 16) text="top," start=false end=false
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frag[2]: rect=(89.73274, 88, 36.66373, 16) text="dotted" start=false end=false
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frag[3]: rect=(129.4508, 88, 40.90455, 16) text="bottom" start=false end=false
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LayoutBox node=#24 tag=anonymous box=anon
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content: (0, 0, 150.35535, 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: "Dashed top, dotted b..."
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