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 * * Neither the name of Google Inc. nor the names of its 11 * contributors may be used to endorse or promote products derived from 12 * this software without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef NodeRenderingTraversal_h 28 #define NodeRenderingTraversal_h 29 30 #include "core/dom/Element.h" 31 32 namespace WebCore { 33 34 class InsertionPoint; 35 36 namespace NodeRenderingTraversal { 37 38 class ParentDetails { 39 public: 40 ParentDetails() 41 : m_insertionPoint(0) 42 , m_resetStyleInheritance(false) 43 , m_outOfComposition(false) 44 { } 45 46 InsertionPoint* insertionPoint() const { return m_insertionPoint; } 47 bool resetStyleInheritance() const { return m_resetStyleInheritance; } 48 bool outOfComposition() const { return m_outOfComposition; } 49 50 void didTraverseInsertionPoint(InsertionPoint*); 51 void didTraverseShadowRoot(const ShadowRoot*); 52 void childWasOutOfComposition() { m_outOfComposition = true; } 53 54 bool operator==(const ParentDetails& other) 55 { 56 return m_insertionPoint == other.m_insertionPoint 57 && m_resetStyleInheritance == other.m_resetStyleInheritance 58 && m_outOfComposition == other.m_outOfComposition; 59 } 60 61 private: 62 InsertionPoint* m_insertionPoint; 63 bool m_resetStyleInheritance; 64 bool m_outOfComposition; 65 }; 66 67 ContainerNode* parent(const Node*); 68 ContainerNode* parent(const Node*, ParentDetails*); 69 Node* nextSibling(const Node*); 70 Node* previousSibling(const Node*); 71 72 Node* nextInScope(const Node*); 73 Node* previousInScope(const Node*); 74 Node* parentInScope(const Node*); 75 Node* lastChildInScope(const Node*); 76 77 inline ContainerNode* parent(const Node* node) 78 { 79 ParentDetails unusedDetails; 80 return parent(node, &unusedDetails); 81 } 82 83 inline Element* parentElement(const Node* node) 84 { 85 ParentDetails unusedDetails; 86 Node* found = parent(node, &unusedDetails); 87 return found && found->isElementNode() ? toElement(found) : 0; 88 } 89 90 } 91 92 } // namespace WebCore 93 94 #endif 95