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ladybird/Libraries/LibWeb/Layout
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Andreas Kling 8078d53d4f LibWeb: Avoid intrinsic sizing of boxes that don't create new FC 
When computing the width of a box with `width: auto` in an intrinsic
sizing context (min-content or max-content), we previously called
calculate_min/max_content_width() for every such box.

This was wasteful for boxes that don't establish their own formatting
context (e.g. plain divs in a BFC), since their intrinsic width is
simply the intrinsic width of their contents, which we're already
computing as part of the current layout pass.

By only computing intrinsic widths separately for boxes that actually
create a new formatting context (BFC, flex, grid, table, etc.), we
avoid creating redundant throwaway LayoutState objects and formatting
contexts.

For deeply nested structures with `width: max-content` on an ancestor,
this reduces the number of formatting contexts created from O(n) to
O(1), where n is the nesting depth.
2026-01-14 13:52:22 +01:00
..
AudioBox.cpp LibWeb: Delete AudioPaintable::layout_box() 2025-10-10 09:03:39 +02:00
AudioBox.h LibWeb: Delete AudioPaintable::layout_box() 2025-10-10 09:03:39 +02:00
AvailableSpace.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
AvailableSpace.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
BlockContainer.cpp LibWeb: Split PaintableWithLines from PaintableBox 2026-01-12 11:00:14 +00:00
BlockContainer.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
BlockFormattingContext.cpp LibWeb: Avoid intrinsic sizing of boxes that don't create new FC 2026-01-14 13:52:22 +01:00
BlockFormattingContext.h LibWeb: Implement CSS-Multicol's 'Pseudo-Algorithm' 2025-12-15 09:45:48 +00:00
Box.cpp LibWeb: Treat near-zero aspect-ratios as degenerate 2025-12-30 12:45:31 +01:00
Box.h LibWeb: Enable EXPLICIT_SYMBOL_EXPORT 2025-08-23 16:04:36 -06:00
BreakNode.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
BreakNode.h Everywhere: Change west consts caught by clang-format-21 to east consts 2025-08-29 18:18:55 +01:00
CanvasBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
CanvasBox.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
CheckBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
CheckBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
FieldSetBox.cpp Meta: Disallow links to single-page HTML spec 2025-02-05 16:04:50 -07:00
FieldSetBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
FlexFormattingContext.cpp LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
FlexFormattingContext.h LibWeb: Mark flex item main size definite if resolved from aspect-ratio 2025-11-07 16:42:32 +01:00
FormAssociatedLabelableNode.h LibWeb: Replace usages of dynamic_cast with as and as_if 2025-08-22 20:26:09 +02:00
FormattingContext.cpp LibWeb: Return 0 for intrinsic sizes of childless boxes 2026-01-14 11:46:23 +01:00
FormattingContext.h LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
GridFormattingContext.cpp LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
GridFormattingContext.h LibWeb: Make LengthBox hold LengthPercentageOrAuto 2025-09-04 13:31:24 +01:00
ImageBox.cpp LibWeb: Don't assume ImageBox's image provider is the DOM node 2025-09-25 22:38:05 +01:00
ImageBox.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
ImageProvider.cpp Everywhere: Avoid large rebuilds when editing (Immutable)Bitmap headers 2025-11-28 18:32:48 +01:00
ImageProvider.h LibWeb: Add ImageProvider virtual to access the DecodedImageData 2025-11-05 09:11:49 +01:00
InlineFormattingContext.cpp LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
InlineFormattingContext.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
InlineLevelIterator.cpp LibWeb: Pre-generate items in InlineLevelIterator 2026-01-11 11:10:19 +01:00
InlineLevelIterator.h LibWeb: Pre-generate items in InlineLevelIterator 2026-01-11 11:10:19 +01:00
InlineNode.cpp LibWeb: Split PaintableWithLines from PaintableBox 2026-01-12 11:00:14 +00:00
InlineNode.h LibWeb: Add fast_is<T> optimization for Layout::InlineNode 2025-09-22 15:00:50 +02:00
Label.cpp AK+Everywhere: Rename verify_cast to as 2025-01-21 11:34:06 -05:00
Label.h Everywhere: Change west consts caught by clang-format-21 to east consts 2025-08-29 18:18:55 +01:00
LabelableNode.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
LabelableNode.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
LayoutState.cpp LibWeb: Split PaintableWithLines from PaintableBox 2026-01-12 11:00:14 +00:00
LayoutState.h LibWeb: Simplify UsedValues::static_position() 2025-08-28 13:45:37 +02:00
LegendBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
LegendBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
LineBox.cpp LibWeb: Store correct text offsets in PaintableFragment 2025-09-12 15:34:09 -04:00
LineBox.h LibWeb: Make fragment start/length size_t instead of int 2025-06-13 15:08:26 +02:00
LineBoxFragment.cpp LibWeb: Store correct text offsets in PaintableFragment 2025-09-12 15:34:09 -04:00
LineBoxFragment.h LibWeb: Store correct text offsets in PaintableFragment 2025-09-12 15:34:09 -04:00
LineBuilder.cpp LibWeb/Layout: Honor hanging and each-line in text-indent 2025-11-20 16:02:40 +01:00
LineBuilder.h LibWeb/Layout: Honor hanging and each-line in text-indent 2025-11-20 16:02:40 +01:00
ListItemBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
ListItemBox.h Meta: Enforce newlines around namespaces 2025-05-14 02:01:59 -06:00
ListItemMarkerBox.cpp AK+LibWeb/CSS: Add lower-greek counter style 2025-07-21 15:18:17 +01:00
ListItemMarkerBox.h LibWeb: Improve graphical list item marker positioning 2025-07-17 09:35:09 +01:00
NavigableContainerViewport.cpp LibWeb: Avoid including Navigable.h in headers 2025-10-20 10:16:55 +01:00
NavigableContainerViewport.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
Node.cpp LibWeb: Create containing blocks for non-initial filter values 2026-01-12 11:52:50 +00:00
Node.h LibWeb/Layout: Implement fixed positioning containing blocks 2026-01-06 15:54:57 +00:00
RadioButton.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
RadioButton.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
ReplacedBox.cpp LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
ReplacedBox.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
SVGBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGBox.h AK+Everywhere: Rename verify_cast to as 2025-01-21 11:34:06 -05:00
SVGClipBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGClipBox.h LibWeb: Add fast_is<T> for hotly dynamic_cast'ed things on imdb.com 2025-09-25 21:42:52 +02:00
SVGForeignObjectBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGForeignObjectBox.h LibWeb: Make SVG foreignObject establish a new stacking context 2025-07-09 14:36:08 +02:00
SVGFormattingContext.cpp LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
SVGFormattingContext.h LibWeb: Improve support for SVG text positioning attributes 2025-11-20 23:15:24 +01:00
SVGGeometryBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGGeometryBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGGraphicsBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGGraphicsBox.h LibWeb: Enable EXPLICIT_SYMBOL_EXPORT 2025-08-23 16:04:36 -06:00
SVGImageBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGImageBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGMaskBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGMaskBox.h AK+Everywhere: Rename verify_cast to as 2025-01-21 11:34:06 -05:00
SVGSVGBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGSVGBox.h LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
SVGTextBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGTextBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGTextPathBox.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
SVGTextPathBox.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
TableFormattingContext.cpp LibWeb: Add debug tracing for FormattingContext::run() calls 2026-01-09 08:12:21 +01:00
TableFormattingContext.h Everywhere: Change west consts caught by clang-format-21 to east consts 2025-08-29 18:18:55 +01:00
TableGrid.cpp LibWeb/Layout: Spec-comment Table "algorithm for processing rows" 2025-11-30 11:48:14 +01:00
TableGrid.h LibWeb: Avoid having the same code in two files 2025-12-24 14:10:27 +01:00
TableWrapper.cpp LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
TableWrapper.h LibWeb: Make CSS::ComputedProperties GC-allocated 2024-12-22 10:12:49 +01:00
TextNode.cpp LibWeb: Add ASCII fast path for bidi class lookups in text layout 2026-01-11 11:10:19 +01:00
TextNode.h LibWeb: Prefer non-emoji font when deciding width of space between words 2025-11-06 23:42:01 +01:00
TreeBuilder.cpp LibGC: Only call finalize() on types that override finalize() 2026-01-07 20:51:17 +01:00
TreeBuilder.h LibWeb/CSS: Move and rename PseudoElement types to prep for code gen 2025-03-24 09:49:50 +00:00
VideoBox.cpp LibWeb: Allow Layout::ImageBox to be anonymous 2025-07-28 22:46:27 +02:00
VideoBox.h LibGC: Only call finalize() on types that override finalize() 2026-01-07 20:51:17 +01:00
Viewport.cpp LibWeb: Rename is_generated to is_generated_for_pseudo_element 2025-09-24 12:33:17 +01:00
Viewport.h Everywhere: Change west consts caught by clang-format-21 to east consts 2025-08-29 18:18:55 +01:00