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Diffstat (limited to 'Source/WebCore/html/HTMLSlotElement.cpp')
-rw-r--r-- | Source/WebCore/html/HTMLSlotElement.cpp | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/Source/WebCore/html/HTMLSlotElement.cpp b/Source/WebCore/html/HTMLSlotElement.cpp new file mode 100644 index 000000000..58ef059f8 --- /dev/null +++ b/Source/WebCore/html/HTMLSlotElement.cpp @@ -0,0 +1,155 @@ +/* + * Copyright (C) 2015 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "HTMLSlotElement.h" + +#include "Event.h" +#include "EventNames.h" +#include "HTMLNames.h" +#include "MutationObserver.h" +#include "ShadowRoot.h" +#include "Text.h" + +namespace WebCore { + +using namespace HTMLNames; + +Ref<HTMLSlotElement> HTMLSlotElement::create(const QualifiedName& tagName, Document& document) +{ + return adoptRef(*new HTMLSlotElement(tagName, document)); +} + +HTMLSlotElement::HTMLSlotElement(const QualifiedName& tagName, Document& document) + : HTMLElement(tagName, document) +{ + ASSERT(hasTagName(slotTag)); +} + +HTMLSlotElement::InsertionNotificationRequest HTMLSlotElement::insertedInto(ContainerNode& insertionPoint) +{ + auto insertionResult = HTMLElement::insertedInto(insertionPoint); + ASSERT_UNUSED(insertionResult, insertionResult == InsertionDone); + + // This function could be called when this element's shadow root's host or its ancestor is inserted. + // This element is new to the shadow tree (and its tree scope) only if the parent into which this element + // or its ancestor is inserted belongs to the same tree scope as this element's. + if (insertionPoint.isInShadowTree() && isInShadowTree() && &insertionPoint.treeScope() == &treeScope()) { + if (auto shadowRoot = containingShadowRoot()) + shadowRoot->addSlotElementByName(attributeWithoutSynchronization(nameAttr), *this); + } + + return InsertionDone; +} + +void HTMLSlotElement::removedFrom(ContainerNode& insertionPoint) +{ + // ContainerNode::removeBetween always sets the removed child's tree scope to Document's but InShadowRoot flag is unset in Node::removedFrom. + // So if InShadowRoot flag is set but this element's tree scope is Document's, this element has just been removed from a shadow root. + if (insertionPoint.isInShadowTree() && isInShadowTree() && &treeScope() == &document()) { + auto* oldShadowRoot = insertionPoint.containingShadowRoot(); + ASSERT(oldShadowRoot); + oldShadowRoot->removeSlotElementByName(attributeWithoutSynchronization(nameAttr), *this); + } + + HTMLElement::removedFrom(insertionPoint); +} + +void HTMLSlotElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason) +{ + HTMLElement::attributeChanged(name, oldValue, newValue, reason); + + if (isInShadowTree() && name == nameAttr) { + if (auto* shadowRoot = containingShadowRoot()) { + shadowRoot->removeSlotElementByName(oldValue, *this); + shadowRoot->addSlotElementByName(newValue, *this); + } + } +} + +const Vector<Node*>* HTMLSlotElement::assignedNodes() const +{ + auto* shadowRoot = containingShadowRoot(); + if (!shadowRoot) + return nullptr; + + return shadowRoot->assignedNodesForSlot(*this); +} + +static void flattenAssignedNodes(Vector<Node*>& nodes, const HTMLSlotElement& slot) +{ + auto* assignedNodes = slot.assignedNodes(); + if (!assignedNodes) { + for (Node* child = slot.firstChild(); child; child = child->nextSibling()) { + if (is<HTMLSlotElement>(*child)) + flattenAssignedNodes(nodes, downcast<HTMLSlotElement>(*child)); + else if (is<Text>(*child) || is<Element>(*child)) + nodes.append(child); + } + return; + } + for (Node* node : *assignedNodes) { + if (is<HTMLSlotElement>(*node)) + flattenAssignedNodes(nodes, downcast<HTMLSlotElement>(*node)); + else + nodes.append(node); + } +} + +Vector<Node*> HTMLSlotElement::assignedNodes(const AssignedNodesOptions& options) const +{ + if (options.flatten) { + Vector<Node*> nodes; + flattenAssignedNodes(nodes, *this); + return nodes; + } + auto* assignedNodes = this->assignedNodes(); + if (!assignedNodes) + return { }; + return *assignedNodes; +} + +void HTMLSlotElement::enqueueSlotChangeEvent() +{ + // https://dom.spec.whatwg.org/#signal-a-slot-change + if (m_inSignalSlotList) + return; + m_inSignalSlotList = true; + MutationObserver::enqueueSlotChangeEvent(*this); +} + +void HTMLSlotElement::dispatchSlotChangeEvent() +{ + m_inSignalSlotList = false; + + bool bubbles = true; + bool cancelable = false; + Ref<Event> event = Event::create(eventNames().slotchangeEvent, bubbles, cancelable); + event->setTarget(this); + dispatchEvent(event); +} + +} + |