| /* |
| * Copyright (C) 2015 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "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 THE COPYRIGHT |
| * OWNER 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. |
| */ |
| |
| #ifndef HTMLSlotElement_h |
| #define HTMLSlotElement_h |
| |
| #include "core/CoreExport.h" |
| #include "core/html/HTMLElement.h" |
| |
| namespace blink { |
| |
| class AssignedNodesOptions; |
| |
| class CORE_EXPORT HTMLSlotElement final : public HTMLElement { |
| DEFINE_WRAPPERTYPEINFO(); |
| public: |
| DECLARE_NODE_FACTORY(HTMLSlotElement); |
| |
| const HeapVector<Member<Node>>& assignedNodes(); |
| const HeapVector<Member<Node>>& getDistributedNodes(); |
| const HeapVector<Member<Node>> assignedNodesForBinding(const AssignedNodesOptions&); |
| |
| Node* firstDistributedNode() const { return m_distributedNodes.isEmpty() ? nullptr : m_distributedNodes.first().get(); } |
| Node* lastDistributedNode() const { return m_distributedNodes.isEmpty() ? nullptr : m_distributedNodes.last().get(); } |
| |
| Node* distributedNodeNextTo(const Node&) const; |
| Node* distributedNodePreviousTo(const Node&) const; |
| |
| void appendAssignedNode(Node&); |
| |
| void resolveDistributedNodes(); |
| void appendDistributedNode(Node&); |
| void appendDistributedNodesFrom(const HTMLSlotElement& other); |
| |
| void updateDistributedNodesWithFallback(); |
| |
| void lazyReattachDistributedNodesIfNeeded(); |
| |
| void attach(const AttachContext& = AttachContext()) final; |
| void detach(const AttachContext& = AttachContext()) final; |
| |
| void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason = ModifiedDirectly) final; |
| |
| short tabIndex() const override; |
| AtomicString name() const; |
| |
| // This method can be slow because this has to traverse the children of a shadow host. |
| // This method should be used only when m_assignedNodes is dirty. |
| // e.g. To detect a slotchange event in DOM mutations. |
| bool hasAssignedNodesSlow() const; |
| bool findHostChildWithSameSlotName() const; |
| |
| void enqueueSlotChangeEvent(); |
| |
| void clearDistribution(); |
| void saveAndClearDistribution(); |
| |
| static AtomicString normalizeSlotName(const AtomicString&); |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| HTMLSlotElement(Document&); |
| |
| InsertionNotificationRequest insertedInto(ContainerNode*) final; |
| void removedFrom(ContainerNode*) final; |
| void willRecalcStyle(StyleRecalcChange) final; |
| |
| void dispatchSlotChangeEvent(); |
| |
| HeapVector<Member<Node>> m_assignedNodes; |
| HeapVector<Member<Node>> m_distributedNodes; |
| HeapVector<Member<Node>> m_oldDistributedNodes; |
| HeapHashMap<Member<const Node>, size_t> m_distributedIndices; |
| bool m_slotchangeEventEnqueued = false; |
| }; |
| |
| } // namespace blink |
| |
| #endif // HTMLSlotElement_h |