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 UserActionElementSet_h 28 #define UserActionElementSet_h 29 30 #include "wtf/HashMap.h" 31 #include "wtf/PassOwnPtr.h" 32 #include "wtf/RefPtr.h" 33 34 namespace WebCore { 35 36 class Node; 37 class Element; 38 39 class UserActionElementSet { 40 public: 41 static PassOwnPtr<UserActionElementSet> create() { return adoptPtr(new UserActionElementSet()); } 42 43 bool isFocused(const Node* node) { return hasFlags(node, IsFocusedFlag); } 44 bool isActive(const Node* node) { return hasFlags(node, IsActiveFlag); } 45 bool isInActiveChain(const Node* node) { return hasFlags(node, InActiveChainFlag); } 46 bool isHovered(const Node* node) { return hasFlags(node, IsHoveredFlag); } 47 void setFocused(Node* node, bool enable) { setFlags(node, enable, IsFocusedFlag); } 48 void setActive(Node* node, bool enable) { setFlags(node, enable, IsActiveFlag); } 49 void setInActiveChain(Node* node, bool enable) { setFlags(node, enable, InActiveChainFlag); } 50 void setHovered(Node* node, bool enable) { setFlags(node, enable, IsHoveredFlag); } 51 52 UserActionElementSet(); 53 ~UserActionElementSet(); 54 55 void didDetach(Node*); 56 void documentDidRemoveLastRef(); 57 58 private: 59 enum ElementFlags { 60 IsActiveFlag = 1 , 61 InActiveChainFlag = 1 << 1, 62 IsHoveredFlag = 1 << 2, 63 IsFocusedFlag = 1 << 3 64 }; 65 66 void setFlags(Node* node, bool enable, unsigned flags) { enable ? setFlags(node, flags) : clearFlags(node, flags); } 67 void setFlags(Node*, unsigned); 68 void clearFlags(Node*, unsigned); 69 bool hasFlags(const Node*, unsigned flags) const; 70 71 void setFlags(Element*, unsigned); 72 void clearFlags(Element*, unsigned); 73 bool hasFlags(const Element*, unsigned flags) const; 74 75 typedef HashMap<RefPtr<Element>, unsigned> ElementFlagMap; 76 ElementFlagMap m_elements; 77 }; 78 79 } // namespace 80 81 #endif // UserActionElementSet_h 82
