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8cbe27b2f9
This change introduces StyleInvalidator as a preparation for upcoming change that will make `perform_pending_style_invalidations()` take care of pending invalidation sets.
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
/*
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* Copyright (c) 2025, 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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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/Node.h>
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#include <LibWeb/DOM/ShadowRoot.h>
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#include <LibWeb/DOM/StyleInvalidator.h>
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namespace Web::DOM {
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GC_DEFINE_ALLOCATOR(StyleInvalidator);
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// This function makes a full pass over the entire DOM and converts "entire subtree needs style update"
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// into "needs style update" for each inclusive descendant where it's found.
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void StyleInvalidator::perform_pending_style_invalidations(Node& node, bool invalidate_entire_subtree)
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{
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invalidate_entire_subtree |= node.entire_subtree_needs_style_update();
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if (invalidate_entire_subtree) {
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node.set_needs_style_update_internal(true);
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if (node.has_child_nodes())
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node.set_child_needs_style_update(true);
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}
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for (auto* child = node.first_child(); child; child = child->next_sibling()) {
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perform_pending_style_invalidations(*child, invalidate_entire_subtree);
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}
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if (node.is_element()) {
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auto& element = static_cast<Element&>(node);
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if (auto shadow_root = element.shadow_root()) {
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perform_pending_style_invalidations(*shadow_root, invalidate_entire_subtree);
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if (invalidate_entire_subtree)
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node.set_child_needs_style_update(true);
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}
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}
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node.set_entire_subtree_needs_style_update(false);
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}
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}
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