1 /* 2 * Copyright (C) 2010 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 INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef BackForwardController_h 27 #define BackForwardController_h 28 29 #include "wtf/Forward.h" 30 #include "wtf/Noncopyable.h" 31 #include "wtf/RefPtr.h" 32 33 namespace WebCore { 34 35 class BackForwardClient; 36 class HistoryItem; 37 class Page; 38 39 // FIXME: Why does this class exist? It seems to delegate almost entirely to Page, and perhaps should be part of Page's implementation. 40 class BackForwardController { 41 WTF_MAKE_NONCOPYABLE(BackForwardController); WTF_MAKE_FAST_ALLOCATED; 42 public: 43 ~BackForwardController(); 44 45 static PassOwnPtr<BackForwardController> create(Page*, BackForwardClient*); 46 47 BackForwardClient* client() const { return m_client; } 48 49 void goBackOrForward(int distance); 50 51 bool goBack(); 52 bool goForward(); 53 54 void addItem(PassRefPtr<HistoryItem>); 55 void setCurrentItem(HistoryItem*); 56 57 int count() const; 58 int backCount() const; 59 int forwardCount() const; 60 61 HistoryItem* itemAtIndex(int); 62 63 bool isActive(); 64 65 void close(); 66 67 HistoryItem* backItem() { return itemAtIndex(-1); } 68 HistoryItem* currentItem() { return itemAtIndex(0); } 69 HistoryItem* forwardItem() { return itemAtIndex(1); } 70 71 private: 72 BackForwardController(Page*, BackForwardClient*); 73 74 Page* m_page; 75 BackForwardClient* m_client; 76 }; 77 78 } // namespace WebCore 79 80 #endif // BackForwardController_h 81