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>
87 lines
3.6 KiB
Plaintext
87 lines
3.6 KiB
Plaintext
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content: (0, 0, 800, 180.8)
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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=#2 tag=body box=block
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content: (8, 8, 784, 156.8)
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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=#4 tag=p box=block
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content: (8, 24, 784, 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=79.48311
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LayoutBox node=#5 tag=b 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=#6 tag=anonymous box=anon
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content: (0, 0, 79.48312, 16)
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padding: 0 0 0 0
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text: "Bold via b tag"
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LayoutBox node=#8 tag=p box=block
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content: (8, 59.2, 784, 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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LayoutBox node=#9 tag=strong 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=#10 tag=anonymous box=anon
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content: (0, 0, 110.70778, 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: "Bold via strong tag"
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LayoutBox node=#12 tag=p box=block
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content: (8, 94.4, 784, 19.200005)
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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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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: "Bold via CSS"
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LayoutBox node=#15 tag=p box=block
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content: (8, 129.6, 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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LayoutBox node=#16 tag=anonymous box=anon
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text: "Normal weight text"
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