9340d2d1a3
Move the layout tree from GC allocation to refcounted ownership so removed layout and paint subtrees are destroyed synchronously instead of waiting for the next GC sweep. This dramatically reduces GC memory usage peaks after layout tree churn and makes it easier for memory use to fall back after large document updates. Update layout factories, tree traversal, SVG layout node creation, paintable back-pointers, and pseudo-element layout links to use RefPtr ownership. Make display: contents follow the same shape as Blink and WebKit: the element itself does not create a layout node, and its children are flattened into the nearest layout parent. Wrap direct non-whitespace text in an anonymous inline node when the boxless element contributes inherited style to that text. Use an internal inline wrapper for display: contents pseudo-elements so generated content can still participate in layout, painting, hit testing, and pseudo-element queries. Keep CSSOM reporting the computed display value from the pseudo style, not the internal wrapper. Remove the retained out-of-tree layout node list and its testing hook, since the flattened model does not need a side owner for boxless elements. Add coverage for inherited text style, dynamic insertion order, pseudo-element hit testing, and computed style queries.
79 lines
3.2 KiB
C++
79 lines
3.2 KiB
C++
/*
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* Copyright (c) 2026, Tim Ledbetter <tim.ledbetter@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibGC/RootHashTable.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Layout/Node.h>
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#include <LibWeb/SVG/AttributeParser.h>
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#include <LibWeb/SVG/SVGAnimatedLength.h>
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#include <LibWeb/SVG/SVGElement.h>
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#include <LibWeb/SVG/SVGFitToViewBox.h>
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#include <LibWeb/SVG/SVGGradientElement.h>
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#include <LibWeb/SVG/SVGURIReference.h>
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namespace Web::SVG {
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class SVGPatternElement
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: public SVGElement
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, public SVGFitToViewBox
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, public SVGURIReferenceMixin<SupportsXLinkHref::Yes> {
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WEB_PLATFORM_OBJECT(SVGPatternElement, SVGElement);
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GC_DECLARE_ALLOCATOR(SVGPatternElement);
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public:
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virtual ~SVGPatternElement() override = default;
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virtual void attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_) override;
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SVGUnits pattern_units() const;
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SVGUnits pattern_content_units() const;
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Optional<Gfx::AffineTransform> pattern_transform() const;
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NumberPercentage pattern_x() const;
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NumberPercentage pattern_y() const;
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NumberPercentage pattern_width() const;
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NumberPercentage pattern_height() const;
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GC::Ref<SVGAnimatedLength> x() const;
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GC::Ref<SVGAnimatedLength> y() const;
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GC::Ref<SVGAnimatedLength> width() const;
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GC::Ref<SVGAnimatedLength> height() const;
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GC::Ptr<SVGPatternElement const> pattern_content_element() const;
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Optional<Painting::PaintStyle> to_gfx_paint_style(SVGPaintContext const&, DisplayListRecordingContext&, Layout::Node const& target_layout_node) const;
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virtual RefPtr<Layout::Node> create_layout_node(CSS::ComputedProperties const&) override { return nullptr; }
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protected:
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SVGPatternElement(DOM::Document&, DOM::QualifiedName);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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private:
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GC::Ptr<SVGPatternElement const> linked_pattern(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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GC::Ptr<SVGPatternElement const> pattern_content_element_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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SVGUnits pattern_units_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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SVGUnits pattern_content_units_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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Optional<Gfx::AffineTransform> pattern_transform_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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NumberPercentage pattern_x_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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NumberPercentage pattern_y_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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NumberPercentage pattern_width_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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NumberPercentage pattern_height_impl(GC::RootHashTable<SVGPatternElement const*>& seen_patterns) const;
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Optional<SVGUnits> m_pattern_units;
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Optional<SVGUnits> m_pattern_content_units;
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Optional<Gfx::AffineTransform> m_pattern_transform;
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Optional<NumberPercentage> m_x;
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Optional<NumberPercentage> m_y;
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Optional<NumberPercentage> m_width;
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Optional<NumberPercentage> m_height;
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};
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}
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