--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/HistoryController.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 HistoryController_h
+#define HistoryController_h
+
+#include "FrameLoaderTypes.h"
+#include "PlatformString.h"
+#include <wtf/Noncopyable.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class Frame;
+class HistoryItem;
+class SerializedScriptValue;
+
+class HistoryController : public Noncopyable {
+public:
+    enum HistoryUpdateType { UpdateAll, UpdateAllExceptBackForwardList };
+
+    HistoryController(Frame*);
+    ~HistoryController();
+
+    void saveScrollPositionAndViewStateToItem(HistoryItem*);
+    void restoreScrollPositionAndViewState();
+
+    void updateBackForwardListForFragmentScroll();
+
+    void saveDocumentState();
+    void saveDocumentAndScrollState();
+    void restoreDocumentState();
+
+    void invalidateCurrentItemCachedPage();
+
+    void goToItem(HistoryItem*, FrameLoadType);
+
+    void updateForBackForwardNavigation();
+    void updateForReload();
+    void updateForStandardLoad(HistoryUpdateType updateType = UpdateAll);
+    void updateForRedirectWithLockedBackForwardList();
+    void updateForClientRedirect();
+    void updateForCommit();
+    void updateForSameDocumentNavigation();
+    void updateForFrameLoadCompleted();
+
+    HistoryItem* currentItem() const { return m_currentItem.get(); }
+    void setCurrentItem(HistoryItem*);
+    void setCurrentItemTitle(const String&);
+    bool currentItemShouldBeReplaced() const;
+
+    HistoryItem* provisionalItem() const { return m_provisionalItem.get(); }
+    void setProvisionalItem(HistoryItem*);
+
+    void pushState(PassRefPtr<SerializedScriptValue>, const String& title, const String& url);
+    void replaceState(PassRefPtr<SerializedScriptValue>, const String& title, const String& url);
+
+private:
+    PassRefPtr<HistoryItem> createItem(bool useOriginal);
+    PassRefPtr<HistoryItem> createItemTree(Frame* targetFrame, bool clipAtTarget);
+
+    void recursiveGoToItem(HistoryItem*, HistoryItem*, FrameLoadType);
+    bool childFramesMatchItem(HistoryItem*) const;
+    void updateBackForwardListClippedAtTarget(bool doClip);
+
+    Frame* m_frame;
+
+    RefPtr<HistoryItem> m_currentItem;
+    RefPtr<HistoryItem> m_previousItem;
+    RefPtr<HistoryItem> m_provisionalItem;
+};
+
+} // namespace WebCore
+
+#endif // HistoryController_h