186 lines
6.2 KiB
C++
186 lines
6.2 KiB
C++
/*
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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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* 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 "HTMLSlotElement.h"
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#include "Event.h"
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#include "EventNames.h"
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#include "HTMLNames.h"
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#include "MutationObserver.h"
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#include "ShadowRoot.h"
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#include "Text.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/SetForScope.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLSlotElement);
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using namespace HTMLNames;
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Ref<HTMLSlotElement> HTMLSlotElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new HTMLSlotElement(tagName, document));
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}
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HTMLSlotElement::HTMLSlotElement(const QualifiedName& tagName, Document& document)
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: HTMLElement(tagName, document)
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{
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ASSERT(hasTagName(slotTag));
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}
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HTMLSlotElement::InsertedIntoAncestorResult HTMLSlotElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
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{
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SetForScope isInInsertedIntoAncestor { m_isInInsertedIntoAncestor, true };
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auto insertionResult = HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
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ASSERT_UNUSED(insertionResult, insertionResult == InsertedIntoAncestorResult::Done);
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if (insertionType.treeScopeChanged && isInShadowTree()) {
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if (auto* shadowRoot = containingShadowRoot())
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shadowRoot->addSlotElementByName(attributeWithoutSynchronization(nameAttr), *this);
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}
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return InsertedIntoAncestorResult::Done;
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}
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void HTMLSlotElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
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{
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if (removalType.treeScopeChanged && oldParentOfRemovedTree.isInShadowTree()) {
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auto* oldShadowRoot = oldParentOfRemovedTree.containingShadowRoot();
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ASSERT(oldShadowRoot);
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oldShadowRoot->removeSlotElementByName(attributeWithoutSynchronization(nameAttr), *this, oldParentOfRemovedTree);
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}
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HTMLElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
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}
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void HTMLSlotElement::childrenChanged(const ChildChange& childChange)
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{
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HTMLElement::childrenChanged(childChange);
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if (isInShadowTree()) {
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if (auto* shadowRoot = containingShadowRoot())
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shadowRoot->slotFallbackDidChange(*this);
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}
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}
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void HTMLSlotElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
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{
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HTMLElement::attributeChanged(name, oldValue, newValue, reason);
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if (isInShadowTree() && name == nameAttr) {
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if (auto shadowRoot = makeRefPtr(containingShadowRoot()))
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shadowRoot->renameSlotElement(*this, oldValue, newValue);
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}
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}
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const Vector<WeakPtr<Node>>* HTMLSlotElement::assignedNodes() const
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{
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auto shadowRoot = makeRefPtr(containingShadowRoot());
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if (!shadowRoot)
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return nullptr;
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return shadowRoot->assignedNodesForSlot(*this);
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}
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static void flattenAssignedNodes(Vector<Ref<Node>>& nodes, const HTMLSlotElement& slot)
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{
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if (!slot.containingShadowRoot())
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return;
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auto* assignedNodes = slot.assignedNodes();
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if (!assignedNodes) {
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for (RefPtr<Node> child = slot.firstChild(); child; child = child->nextSibling()) {
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if (is<HTMLSlotElement>(*child))
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flattenAssignedNodes(nodes, downcast<HTMLSlotElement>(*child));
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else if (is<Text>(*child) || is<Element>(*child))
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nodes.append(*child);
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}
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return;
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}
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for (auto& nodeWeakPtr : *assignedNodes) {
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auto* node = nodeWeakPtr.get();
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if (UNLIKELY(!node)) {
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ASSERT_NOT_REACHED();
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continue;
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}
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if (is<HTMLSlotElement>(*node) && downcast<HTMLSlotElement>(*node).containingShadowRoot())
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flattenAssignedNodes(nodes, downcast<HTMLSlotElement>(*node));
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else
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nodes.append(*node);
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}
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}
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Vector<Ref<Node>> HTMLSlotElement::assignedNodes(const AssignedNodesOptions& options) const
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{
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if (options.flatten) {
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if (!isInShadowTree())
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return { };
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Vector<Ref<Node>> nodes;
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flattenAssignedNodes(nodes, *this);
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return nodes;
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}
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if (auto* nodes = assignedNodes(); nodes) {
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return WTF::compactMap(*nodes, [](auto& nodeWeakPtr) -> RefPtr<Node> {
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return nodeWeakPtr.get();
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});
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}
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return { };
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}
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Vector<Ref<Element>> HTMLSlotElement::assignedElements(const AssignedNodesOptions& options) const
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{
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return WTF::compactMap(assignedNodes(options), [](auto&& node) -> RefPtr<Element> {
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if (!is<Element>(node))
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return nullptr;
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return static_reference_cast<Element>(WTFMove(node));
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});
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}
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void HTMLSlotElement::enqueueSlotChangeEvent()
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{
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// https://dom.spec.whatwg.org/#signal-a-slot-change
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if (m_inSignalSlotList)
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return;
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m_inSignalSlotList = true;
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MutationObserver::enqueueSlotChangeEvent(*this);
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}
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void HTMLSlotElement::dispatchSlotChangeEvent()
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{
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m_inSignalSlotList = false;
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Ref<Event> event = Event::create(eventNames().slotchangeEvent, Event::CanBubble::Yes, Event::IsCancelable::No);
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event->setTarget(this);
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dispatchEvent(event);
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}
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}
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