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Three display list / layout bugs fixed:
1. Float+stacking-context elements were invisible ("triple skip"):
collect_stacking_participants unconditionally skipped all floats,
even those creating stacking contexts. Now only skips simple floats.
(CSS 2.1 Appendix E steps 2/7)
2. Abs-pos inline children inside IFCs were never laid out or rendered:
- Layout: FormattingContext::Inline now collects abs-pos/fixed children
into pending_absolutes for deferred layout
- Display list: render_non_inline_descendants renders abs-pos/fixed
inline children via render_layout_box_normal
3. Stacking context anonymous text children were double-painted:
render_stacking_context now skips Anonymous children when the parent
has an IFC (they're already rendered by the IFC fragment system)
Also adds guards against abs-pos inline + z-index double-render, and
promotes WPT test static-position-inline-level-absolute-in-block-level-
context-013 from known_fail to pass.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
23 lines
752 B
HTML
23 lines
752 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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body { margin: 0; font-family: sans-serif; font-size: 14px; }
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.container { position: relative; width: 400px; background: #eee; }
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/* Inline element with position:absolute - gets its own IFC via deferred layout */
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.abspos-byline { position: absolute; left: 0; top: 0; font-size: 11px; color: #666; }
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.abspos-byline a { color: #060; }
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</style>
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</head>
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<body>
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<!-- Abs-pos inline span should render its text content even though it's
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excluded from the parent's IFC. The display list builder must render
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positioned inline children via render_layout_box_normal. -->
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<div class="container">
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<span class="abspos-byline">
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Posted by <a href="#">Author</a> on Monday
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</span>
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</div>
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</body>
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</html>
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