1/* 2 * Copyright (C) 2007 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef History_h 27#define History_h 28 29#include "DOMWindowProperty.h" 30#include "KURL.h" 31#include "ScriptWrappable.h" 32#include "SerializedScriptValue.h" 33#include <wtf/Forward.h> 34#include <wtf/PassRefPtr.h> 35#include <wtf/RefCounted.h> 36 37namespace WebCore { 38 39class Frame; 40class ScriptExecutionContext; 41typedef int ExceptionCode; 42 43class History : public ScriptWrappable, public RefCounted<History>, public DOMWindowProperty { 44public: 45 static PassRefPtr<History> create(Frame* frame) { return adoptRef(new History(frame)); } 46 47 unsigned length() const; 48 PassRefPtr<SerializedScriptValue> state(); 49 void back(); 50 void forward(); 51 void go(int distance); 52 53 void back(ScriptExecutionContext*); 54 void forward(ScriptExecutionContext*); 55 void go(ScriptExecutionContext*, int distance); 56 57 bool stateChanged() const; 58 bool isSameAsCurrentState(SerializedScriptValue*) const; 59 60 enum StateObjectType { 61 StateObjectPush, 62 StateObjectReplace 63 }; 64 void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, StateObjectType, ExceptionCode&); 65 66private: 67 explicit History(Frame*); 68 69 KURL urlForState(const String& url); 70 71 PassRefPtr<SerializedScriptValue> stateInternal() const; 72 73 RefPtr<SerializedScriptValue> m_lastStateObjectRequested; 74}; 75 76} // namespace WebCore 77 78#endif // History_h 79