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 "bindings/core/v8/ScriptWrappable.h" 30 #include "bindings/core/v8/SerializedScriptValue.h" 31 #include "core/loader/FrameLoaderTypes.h" 32 #include "core/frame/DOMWindowProperty.h" 33 #include "platform/heap/Handle.h" 34 #include "wtf/Forward.h" 35 #include "wtf/PassRefPtr.h" 36 #include "wtf/RefCounted.h" 37 38 namespace blink { 39 40 class LocalFrame; 41 class KURL; 42 class ExecutionContext; 43 class ExceptionState; 44 45 class History FINAL : public RefCountedWillBeGarbageCollectedFinalized<History>, public ScriptWrappable, public DOMWindowProperty { 46 DEFINE_WRAPPERTYPEINFO(); 47 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(History); 48 public: create(LocalFrame * frame)49 static PassRefPtrWillBeRawPtr<History> create(LocalFrame* frame) 50 { 51 return adoptRefWillBeNoop(new History(frame)); 52 } 53 54 unsigned length() const; 55 SerializedScriptValue* state(); 56 57 void back(ExecutionContext*); 58 void forward(ExecutionContext*); 59 void go(ExecutionContext*, int distance); 60 61 bool stateChanged() const; 62 bool isSameAsCurrentState(SerializedScriptValue*) const; 63 64 void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, FrameLoadType, ExceptionState&); 65 66 virtual void trace(Visitor*) OVERRIDE; 67 68 private: 69 explicit History(LocalFrame*); 70 71 KURL urlForState(const String& url); 72 73 SerializedScriptValue* stateInternal() const; 74 75 RefPtr<SerializedScriptValue> m_lastStateObjectRequested; 76 }; 77 78 } // namespace blink 79 80 #endif // History_h 81