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 "ExceptionCode.h" 35 36#include <wtf/Vector.h> 37#include <wtf/text/WTFString.h> 38 39namespace WebCore { 40 41class ContainerNode; 42class Element; 43class Node; 44 45#if ENABLE(INSPECTOR) 46 47class InspectorHistory { 48 WTF_MAKE_NONCOPYABLE(InspectorHistory); WTF_MAKE_FAST_ALLOCATED; 49public: 50 class Action { 51 WTF_MAKE_FAST_ALLOCATED; 52 public: 53 Action(const String& name); 54 virtual ~Action(); 55 virtual String toString(); 56 57 virtual String mergeId(); 58 virtual void merge(std::unique_ptr<Action>); 59 60 virtual bool perform(ExceptionCode&) = 0; 61 62 virtual bool undo(ExceptionCode&) = 0; 63 virtual bool redo(ExceptionCode&) = 0; 64 65 virtual bool isUndoableStateMark(); 66 private: 67 String m_name; 68 }; 69 70 InspectorHistory(); 71 virtual ~InspectorHistory(); 72 73 bool perform(std::unique_ptr<Action>, ExceptionCode&); 74 void markUndoableState(); 75 76 bool undo(ExceptionCode&); 77 bool redo(ExceptionCode&); 78 void reset(); 79 80private: 81 Vector<std::unique_ptr<Action>> m_history; 82 size_t m_afterLastActionIndex; 83}; 84 85#endif // ENABLE(INSPECTOR) 86 87} // namespace WebCore 88 89#endif // !defined(InspectorHistory_h) 90