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 InspectorHistory_h 32 #define InspectorHistory_h 33 34 #include "wtf/OwnPtr.h" 35 #include "wtf/Vector.h" 36 #include "wtf/text/WTFString.h" 37 38 namespace WebCore { 39 40 class ExceptionState; 41 42 class InspectorHistory FINAL { 43 WTF_MAKE_NONCOPYABLE(InspectorHistory); WTF_MAKE_FAST_ALLOCATED; 44 public: 45 class Action { 46 WTF_MAKE_FAST_ALLOCATED; 47 public: 48 Action(const String& name); 49 virtual ~Action(); 50 virtual String toString(); 51 52 virtual String mergeId(); 53 virtual void merge(PassOwnPtr<Action>); 54 55 virtual bool perform(ExceptionState&) = 0; 56 57 virtual bool undo(ExceptionState&) = 0; 58 virtual bool redo(ExceptionState&) = 0; 59 60 virtual bool isUndoableStateMark(); 61 private: 62 String m_name; 63 }; 64 65 InspectorHistory(); 66 67 bool perform(PassOwnPtr<Action>, ExceptionState&); 68 void markUndoableState(); 69 70 bool undo(ExceptionState&); 71 bool redo(ExceptionState&); 72 void reset(); 73 74 private: 75 Vector<OwnPtr<Action> > m_history; 76 size_t m_afterLastActionIndex; 77 }; 78 79 80 } // namespace WebCore 81 82 #endif // !defined(InspectorHistory_h) 83