d0b47e32c9
Track when style recomputation may require inherited-style work in a shadow tree, and use that signal when crossing from a shadow host into its shadow root. Shadow descendants can explicitly inherit normally non-inherited host properties, so any host style change may need inherited-style recomputation there. Use the CSS property definition to tell whether changed longhands need to propagate to shadow descendants. Do the same after recomputing inheritance-dependent values, such as host font-size: 2em after a parent font-size change. The shadow DOM tests cover inline and class-driven inherited host style changes, explicit inherit for non-inherited host properties, relative units on hosts, and nested slotted inheritance updates.
42 lines
1.9 KiB
C++
42 lines
1.9 KiB
C++
/*
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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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 <LibWeb/Forward.h>
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namespace Web::CSS {
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struct RequiredInvalidationAfterStyleChange {
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bool repaint : 1 { false };
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bool rebuild_stacking_context_tree : 1 { false };
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bool relayout : 1 { false };
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bool rebuild_layout_tree : 1 { false };
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bool rebuild_accumulated_visual_contexts : 1 { false };
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// The element's change affects rule matching for descendants, without necessarily changing inherited style.
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bool recompute_descendant_styles : 1 { false };
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// At least one inherited longhand changed, so shadow-tree descendants may need inherited style recomputation.
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bool inherited_style_changed : 1 { false };
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void operator|=(RequiredInvalidationAfterStyleChange const& other)
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{
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repaint |= other.repaint;
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rebuild_stacking_context_tree |= other.rebuild_stacking_context_tree;
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relayout |= other.relayout;
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rebuild_layout_tree |= other.rebuild_layout_tree;
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rebuild_accumulated_visual_contexts |= other.rebuild_accumulated_visual_contexts;
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recompute_descendant_styles |= other.recompute_descendant_styles;
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inherited_style_changed |= other.inherited_style_changed;
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}
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[[nodiscard]] bool is_none() const { return !repaint && !rebuild_stacking_context_tree && !relayout && !rebuild_layout_tree && !rebuild_accumulated_visual_contexts && !recompute_descendant_styles && !inherited_style_changed; }
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[[nodiscard]] bool is_full() const { return repaint && rebuild_stacking_context_tree && relayout && rebuild_layout_tree; }
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static RequiredInvalidationAfterStyleChange full() { return { true, true, true, true, false }; }
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};
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RequiredInvalidationAfterStyleChange compute_property_invalidation(CSS::PropertyID property_id, StyleValue const* old_value, StyleValue const* new_value);
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}
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