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LibWeb: Avoid layout invalidation for some CSS property changes
Use the new CSS::property_affects_layout() helper to figure out if we actually need to perform a full relayout after recomputing style. There are three tiers of required invalidation after an element receives new style: none, repaint only, or full relayout. This avoids the need to rebuild the layout tree (and perform layout on it) when trivial properties like "color" etc are changed.
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3 changed files with 60 additions and 10 deletions
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@ -87,7 +87,11 @@ public:
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virtual void parse_attribute(const FlyString& name, const String& value);
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virtual void did_remove_attribute(FlyString const&) { }
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void recompute_style();
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enum class NeedsRelayout {
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No = 0,
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Yes = 1,
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};
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NeedsRelayout recompute_style();
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Layout::NodeWithStyle* layout_node() { return static_cast<Layout::NodeWithStyle*>(Node::layout_node()); }
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const Layout::NodeWithStyle* layout_node() const { return static_cast<const Layout::NodeWithStyle*>(Node::layout_node()); }
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