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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
namespace WebCore {
class InspectorHistory final {
WTF_MAKE_TZONE_ALLOCATED(InspectorHistory);
WTF_MAKE_NONCOPYABLE(InspectorHistory);
public:
class Action {
WTF_MAKE_TZONE_ALLOCATED(Action);
public:
virtual ~Action() = default;
virtual String mergeId() { return emptyString(); }
virtual void merge(std::unique_ptr<Action>) { };
virtual ExceptionOr<void> perform() = 0;
virtual ExceptionOr<void> undo() = 0;
virtual ExceptionOr<void> redo() = 0;
virtual bool isUndoableStateMark() { return false; }
private:
String m_name;
};
InspectorHistory() = default;
ExceptionOr<void> perform(std::unique_ptr<Action>);
void markUndoableState();
ExceptionOr<void> undo();
ExceptionOr<void> redo();
void reset();
private:
Vector<std::unique_ptr<Action>> m_history;
size_t m_afterLastActionIndex { 0 };
};
} // namespace WebCore
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