Add parent-first-child top and parent-last-child bottom margin collapsing using a two-level approach (Level A shifts child inside parent, Level B adjusts grandparent for effective collapsed margin). Fix pre-existing bug in shift_subtree_x that incorrectly skipped absolute/fixed children. Extract shared MARGIN_EPSILON constant, add 9 unit tests and 4 golden tests (209-212), promote 31 WPT tests to pass. Includes code review fixes: pub(crate) visibility for is_root_element, known-limitation docs, and inline-content shift test coverage. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
67 lines
2.5 KiB
Plaintext
67 lines
2.5 KiB
Plaintext
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margin: 8 8 8 8
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LayoutBox node=#5 tag=p box=block
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content: (8, 16, 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=225.26874
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line[0]: rect=(8, 16, 225.26874, 19.2) fragments=9
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LayoutBox node=#6 tag=anonymous box=anon
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text: "Visit "
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LayoutBox node=#7 tag=a box=inline
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text: "Site One"
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text: " and "
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text: " for more info."
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