379 lines
12 KiB
C++
379 lines
12 KiB
C++
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ShadowRoot.h"
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#include "CSSStyleSheet.h"
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#include "ElementTraversal.h"
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#include "HTMLParserIdioms.h"
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#include "HTMLSlotElement.h"
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#if ENABLE(PICTURE_IN_PICTURE_API)
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#include "NotImplemented.h"
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#endif
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#include "RenderElement.h"
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#include "RuntimeEnabledFeatures.h"
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#include "SlotAssignment.h"
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#include "StyleResolver.h"
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#include "StyleScope.h"
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#include "StyleSheetList.h"
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#include "WebAnimation.h"
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#include "markup.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(ShadowRoot);
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struct SameSizeAsShadowRoot : public DocumentFragment, public TreeScope {
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bool flags[4];
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uint8_t mode;
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void* styleScope;
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void* styleSheetList;
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WeakPtr<Element> host;
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void* slotAssignment;
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std::optional<HashMap<AtomString, AtomString>> partMappings;
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};
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COMPILE_ASSERT(sizeof(ShadowRoot) == sizeof(SameSizeAsShadowRoot), shadowroot_should_stay_small);
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#if !ASSERT_ENABLED
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COMPILE_ASSERT(sizeof(WeakPtr<Element>) == sizeof(void*), WeakPtr_should_be_same_size_as_raw_pointer);
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#endif
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ShadowRoot::ShadowRoot(Document& document, ShadowRootMode type, DelegatesFocus delegatesFocus)
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: DocumentFragment(document, CreateShadowRoot)
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, TreeScope(*this, document)
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, m_delegatesFocus(delegatesFocus == DelegatesFocus::Yes)
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, m_type(type)
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, m_styleScope(makeUnique<Style::Scope>(*this))
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{
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}
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ShadowRoot::ShadowRoot(Document& document, std::unique_ptr<SlotAssignment>&& slotAssignment)
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: DocumentFragment(document, CreateShadowRoot)
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, TreeScope(*this, document)
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, m_type(ShadowRootMode::UserAgent)
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, m_styleScope(makeUnique<Style::Scope>(*this))
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, m_slotAssignment(WTFMove(slotAssignment))
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{
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}
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ShadowRoot::~ShadowRoot()
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{
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if (isConnected())
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document().didRemoveInDocumentShadowRoot(*this);
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if (m_styleSheetList)
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m_styleSheetList->detach();
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// We cannot let ContainerNode destructor call willBeDeletedFrom()
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// for this ShadowRoot instance because TreeScope destructor
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// clears Node::m_treeScope thus ContainerNode is no longer able
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// to access it Document reference after that.
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willBeDeletedFrom(document());
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ASSERT(!m_hasBegunDeletingDetachedChildren);
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m_hasBegunDeletingDetachedChildren = true;
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// We must remove all of our children first before the TreeScope destructor
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// runs so we don't go through Node::setTreeScopeRecursively for each child with a
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// destructed tree scope in each descendant.
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removeDetachedChildren();
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}
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Node::InsertedIntoAncestorResult ShadowRoot::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
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{
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DocumentFragment::insertedIntoAncestor(insertionType, parentOfInsertedTree);
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if (insertionType.connectedToDocument)
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document().didInsertInDocumentShadowRoot(*this);
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return InsertedIntoAncestorResult::Done;
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}
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void ShadowRoot::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
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{
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DocumentFragment::removedFromAncestor(removalType, oldParentOfRemovedTree);
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if (removalType.disconnectedFromDocument)
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document().didRemoveInDocumentShadowRoot(*this);
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}
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void ShadowRoot::childrenChanged(const ChildChange& childChange)
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{
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DocumentFragment::childrenChanged(childChange);
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if (!m_host || m_type == ShadowRootMode::UserAgent)
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return; // Don't support first-child, nth-of-type, etc... in UA shadow roots as an optimization.
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// FIXME: Avoid always invalidating style just for first-child, etc... as done in Element::childrenChanged.
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switch (childChange.type) {
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case ChildChange::Type::ElementInserted:
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case ChildChange::Type::ElementRemoved:
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m_host->invalidateStyleForSubtreeInternal();
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break;
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case ChildChange::Type::TextInserted:
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case ChildChange::Type::TextRemoved:
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case ChildChange::Type::TextChanged:
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case ChildChange::Type::AllChildrenRemoved:
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case ChildChange::Type::NonContentsChildRemoved:
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case ChildChange::Type::NonContentsChildInserted:
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case ChildChange::Type::AllChildrenReplaced:
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break;
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}
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}
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void ShadowRoot::moveShadowRootToNewParentScope(TreeScope& newScope, Document& newDocument)
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{
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setParentTreeScope(newScope);
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moveShadowRootToNewDocument(newDocument);
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}
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void ShadowRoot::moveShadowRootToNewDocument(Document& newDocument)
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{
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setDocumentScope(newDocument);
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RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(!parentTreeScope() || &parentTreeScope()->documentScope() == &newDocument);
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// Style scopes are document specific.
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m_styleScope = makeUnique<Style::Scope>(*this);
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RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(&m_styleScope->document() == &newDocument);
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}
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Style::Scope& ShadowRoot::styleScope()
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{
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return *m_styleScope;
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}
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StyleSheetList& ShadowRoot::styleSheets()
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{
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if (!m_styleSheetList)
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m_styleSheetList = StyleSheetList::create(*this);
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return *m_styleSheetList;
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}
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String ShadowRoot::innerHTML() const
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{
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return serializeFragment(*this, SerializedNodes::SubtreesOfChildren);
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}
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ExceptionOr<void> ShadowRoot::setInnerHTML(const String& markup)
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{
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auto fragment = createFragmentForInnerOuterHTML(*host(), markup, AllowScriptingContent);
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if (fragment.hasException())
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return fragment.releaseException();
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return replaceChildrenWithFragment(*this, fragment.releaseReturnValue());
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}
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bool ShadowRoot::childTypeAllowed(NodeType type) const
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{
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switch (type) {
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case ELEMENT_NODE:
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case PROCESSING_INSTRUCTION_NODE:
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case COMMENT_NODE:
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case TEXT_NODE:
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case CDATA_SECTION_NODE:
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return true;
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default:
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return false;
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}
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}
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void ShadowRoot::setResetStyleInheritance(bool value)
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{
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// If this was ever changed after initialization, child styles would need to be invalidated here.
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m_resetStyleInheritance = value;
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}
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Ref<Node> ShadowRoot::cloneNodeInternal(Document&, CloningOperation)
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{
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RELEASE_ASSERT_NOT_REACHED();
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return *static_cast<Node*>(nullptr); // ShadowRoots should never be cloned.
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}
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void ShadowRoot::removeAllEventListeners()
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{
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DocumentFragment::removeAllEventListeners();
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for (Node* node = firstChild(); node; node = NodeTraversal::next(*node))
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node->removeAllEventListeners();
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}
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HTMLSlotElement* ShadowRoot::findAssignedSlot(const Node& node)
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{
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ASSERT(node.parentNode() == host());
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if (!m_slotAssignment)
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return nullptr;
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return m_slotAssignment->findAssignedSlot(node, *this);
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}
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void ShadowRoot::renameSlotElement(HTMLSlotElement& slot, const AtomString& oldName, const AtomString& newName)
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{
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ASSERT(m_slotAssignment);
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return m_slotAssignment->renameSlotElement(slot, oldName, newName, *this);
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}
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void ShadowRoot::addSlotElementByName(const AtomString& name, HTMLSlotElement& slot)
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{
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ASSERT(&slot.rootNode() == this);
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if (!m_slotAssignment)
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m_slotAssignment = makeUnique<SlotAssignment>();
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return m_slotAssignment->addSlotElementByName(name, slot, *this);
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}
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void ShadowRoot::removeSlotElementByName(const AtomString& name, HTMLSlotElement& slot, ContainerNode& oldParentOfRemovedTree)
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{
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ASSERT(m_slotAssignment);
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return m_slotAssignment->removeSlotElementByName(name, slot, &oldParentOfRemovedTree, *this);
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}
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void ShadowRoot::slotFallbackDidChange(HTMLSlotElement& slot)
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{
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ASSERT(&slot.rootNode() == this);
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return m_slotAssignment->slotFallbackDidChange(slot, *this);
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}
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const Vector<WeakPtr<Node>>* ShadowRoot::assignedNodesForSlot(const HTMLSlotElement& slot)
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{
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if (!m_slotAssignment)
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return nullptr;
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return m_slotAssignment->assignedNodesForSlot(slot, *this);
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}
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static std::optional<std::pair<AtomString, AtomString>> parsePartMapping(StringView mappingString)
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{
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const auto end = mappingString.length();
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auto skipWhitespace = [&](auto position) {
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while (position < end && isHTMLSpace(mappingString[position]))
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++position;
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return position;
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};
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auto collectValue = [&](auto position) {
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while (position < end && (!isHTMLSpace(mappingString[position]) && mappingString[position] != ':'))
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++position;
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return position;
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};
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size_t begin = 0;
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begin = skipWhitespace(begin);
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auto firstPartEnd = collectValue(begin);
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if (firstPartEnd == begin)
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return { };
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auto firstPart = mappingString.substring(begin, firstPartEnd - begin).toAtomString();
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begin = skipWhitespace(firstPartEnd);
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if (begin == end)
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return std::make_pair(firstPart, firstPart);
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if (mappingString[begin] != ':')
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return { };
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begin = skipWhitespace(begin + 1);
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auto secondPartEnd = collectValue(begin);
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if (secondPartEnd == begin)
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return { };
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auto secondPart = mappingString.substring(begin, secondPartEnd - begin).toAtomString();
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begin = skipWhitespace(secondPartEnd);
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if (begin != end)
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return { };
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return std::make_pair(firstPart, secondPart);
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}
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static ShadowRoot::PartMappings parsePartMappingsList(StringView mappingsListString)
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{
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ShadowRoot::PartMappings mappings;
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const auto end = mappingsListString.length();
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size_t begin = 0;
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while (begin < end) {
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size_t mappingEnd = begin;
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while (mappingEnd < end && mappingsListString[mappingEnd] != ',')
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++mappingEnd;
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auto result = parsePartMapping(mappingsListString.substring(begin, mappingEnd - begin));
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if (result)
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mappings.add(result->first, Vector<AtomString, 1>()).iterator->value.append(result->second);
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if (mappingEnd == end)
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break;
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begin = mappingEnd + 1;
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}
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return mappings;
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}
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const ShadowRoot::PartMappings& ShadowRoot::partMappings() const
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{
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if (!m_partMappings) {
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auto exportpartsValue = host()->attributeWithoutSynchronization(HTMLNames::exportpartsAttr);
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m_partMappings = parsePartMappingsList(exportpartsValue);
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}
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return *m_partMappings;
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}
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void ShadowRoot::invalidatePartMappings()
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{
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m_partMappings = { };
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}
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Vector<ShadowRoot*> assignedShadowRootsIfSlotted(const Node& node)
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{
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Vector<ShadowRoot*> result;
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for (auto* slot = node.assignedSlot(); slot; slot = slot->assignedSlot()) {
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ASSERT(slot->containingShadowRoot());
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result.append(slot->containingShadowRoot());
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}
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return result;
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}
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#if ENABLE(PICTURE_IN_PICTURE_API)
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HTMLVideoElement* ShadowRoot::pictureInPictureElement() const
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{
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notImplemented();
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return nullptr;
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}
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#endif
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Vector<RefPtr<WebAnimation>> ShadowRoot::getAnimations()
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{
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return document().matchingAnimations([&] (Element& target) -> bool {
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return target.containingShadowRoot() == this;
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});
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}
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}
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