1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#ifndef InsertionPoint_h 32#define InsertionPoint_h 33 34#include "ContentDistributor.h" 35#include "ElementShadow.h" 36#include "HTMLElement.h" 37#include "HTMLNames.h" 38#include "ShadowRoot.h" 39#include <wtf/Forward.h> 40 41namespace WebCore { 42 43class InsertionPoint : public HTMLElement { 44public: 45 enum Type { 46 InternalType, 47 HTMLContentElementType 48 }; 49 50 enum MatchType { 51 AlwaysMatches, 52 NeverMatches, 53 }; 54 55 virtual ~InsertionPoint(); 56 57 bool hasDistribution() const { return m_hasDistribution; } 58 void setHasDistribution() { m_hasDistribution = true; } 59 void clearDistribution() { m_hasDistribution = false; } 60 bool isShadowBoundary() const; 61 bool isActive() const; 62 63 virtual MatchType matchTypeFor(Node*) const { return AlwaysMatches; } 64 virtual Type insertionPointType() const { return InternalType; } 65 66 bool resetStyleInheritance() const; 67 void setResetStyleInheritance(bool); 68 69 virtual void attach(const AttachContext& = AttachContext()) OVERRIDE; 70 virtual void detach(const AttachContext& = AttachContext()) OVERRIDE; 71 72 bool shouldUseFallbackElements() const; 73 74 Node* firstDistributed() const; 75 Node* lastDistributed() const; 76 Node* nextDistributedTo(const Node*) const; 77 Node* previousDistributedTo(const Node*) const; 78 79protected: 80 InsertionPoint(const QualifiedName&, Document*); 81 virtual bool rendererIsNeeded(const NodeRenderingContext&) OVERRIDE; 82 virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE; 83 virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE; 84 virtual void removedFrom(ContainerNode*) OVERRIDE; 85 virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE; 86 virtual bool isInsertionPointNode() const OVERRIDE { return true; } 87 88private: 89 90 bool m_hasDistribution; 91}; 92 93inline InsertionPoint* toInsertionPoint(Node* node) 94{ 95 ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isInsertionPoint()); 96 return static_cast<InsertionPoint*>(node); 97} 98 99inline const InsertionPoint* toInsertionPoint(const Node* node) 100{ 101 ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isInsertionPoint()); 102 return static_cast<const InsertionPoint*>(node); 103} 104 105inline bool isActiveInsertionPoint(const Node* node) 106{ 107 return node->isInsertionPoint() && toInsertionPoint(node)->isActive(); 108} 109 110inline bool isLowerEncapsulationBoundary(Node* node) 111{ 112 if (!node || !node->isInsertionPoint()) 113 return false; 114 return toInsertionPoint(node)->isShadowBoundary(); 115} 116 117inline Node* parentNodeForDistribution(const Node* node) 118{ 119 ASSERT(node); 120 121 if (Node* parent = node->parentNode()) { 122 if (parent->isInsertionPoint() && toInsertionPoint(parent)->shouldUseFallbackElements()) 123 return parent->parentNode(); 124 return parent; 125 } 126 127 return 0; 128} 129 130inline Element* parentElementForDistribution(const Node* node) 131{ 132 if (Node* parent = parentNodeForDistribution(node)) { 133 if (parent->isElementNode()) 134 return toElement(parent); 135 } 136 137 return 0; 138} 139 140inline ElementShadow* shadowOfParentForDistribution(const Node* node) 141{ 142 ASSERT(node); 143 if (Element* parent = parentElementForDistribution(node)) 144 return parent->shadow(); 145 146 return 0; 147} 148 149InsertionPoint* resolveReprojection(const Node*); 150 151} // namespace WebCore 152 153#endif // InsertionPoint_h 154