blob: d490428f138f18f96ed50aed5839be6571102929 [file] [log] [blame]
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/css/style_recalc_root.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
namespace blink {
Element& StyleRecalcRoot::RootElement() const {
Node* root_node = GetRootNode();
DCHECK(root_node);
if (root_node->IsDocumentNode())
return *root_node->GetDocument().documentElement();
if (root_node->IsPseudoElement()) {
// We could possibly have called UpdatePseudoElement, but start at the
// originating element for simplicity.
return *root_node->parentElement();
}
if (root_node->IsInShadowTree()) {
// Since we traverse in light tree order, we might need to traverse slotted
// shadow host children for inheritance for which the recalc root is not an
// ancestor. Since we might re-slot slots, we need to start at the outermost
// shadow host.
TreeScope* tree_scope = &root_node->GetTreeScope();
while (!tree_scope->ParentTreeScope()->RootNode().IsDocumentNode())
tree_scope = tree_scope->ParentTreeScope();
return ToShadowRoot(tree_scope->RootNode()).host();
}
if (root_node->IsTextNode())
return *root_node->parentElement();
return ToElement(*root_node);
}
#if DCHECK_IS_ON()
ContainerNode* StyleRecalcRoot::Parent(const Node& node) const {
return node.ParentOrShadowHostNode();
}
bool StyleRecalcRoot::IsChildDirty(const ContainerNode& node) const {
return node.ChildNeedsStyleRecalc();
}
#endif // DCHECK_IS_ON()
bool StyleRecalcRoot::IsDirty(const Node& node) const {
return node.NeedsStyleRecalc();
}
void StyleRecalcRoot::ClearChildDirtyForAncestors(ContainerNode& parent) const {
for (ContainerNode* ancestor = &parent; ancestor;
ancestor = ancestor->ParentOrShadowHostNode()) {
ancestor->ClearChildNeedsStyleRecalc();
DCHECK(!ancestor->NeedsStyleRecalc());
}
}
} // namespace blink