/* * Copyright (C) 2007 Apple 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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. */ #ifndef History_h #define History_h #include "DOMWindowProperty.h" #include "ScriptWrappable.h" #include "SerializedScriptValue.h" #include "URL.h" #include <wtf/Forward.h> #include <wtf/PassRefPtr.h> #include <wtf/RefCounted.h> namespace WebCore { class Document; class Frame; struct ExceptionCodeWithMessage; typedef int ExceptionCode; class History : public ScriptWrappable, public RefCounted<History>, public DOMWindowProperty { public: static Ref<History> create(Frame* frame) { return adoptRef(*new History(frame)); } unsigned length() const; PassRefPtr<SerializedScriptValue> state(); void back(); void forward(); void go(int); void back(Document&); void forward(Document&); void go(Document&, int); bool stateChanged() const; bool isSameAsCurrentState(SerializedScriptValue*) const; enum class StateObjectType { Push, Replace }; void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, StateObjectType, ExceptionCodeWithMessage&); private: explicit History(Frame*); URL urlForState(const String& url); PassRefPtr<SerializedScriptValue> stateInternal() const; RefPtr<SerializedScriptValue> m_lastStateObjectRequested; unsigned m_currentStateObjectTimeSpanObjectsAdded { 0 }; double m_currentStateObjectTimeSpanStart { 0.0 }; // For the main frame's History object to keep track of all state object usage. uint64_t m_totalStateObjectUsage { 0 }; // For each individual History object to keep track of the most recent state object added. uint64_t m_mostRecentStateObjectUsage { 0 }; }; } // namespace WebCore #endif // History_h