1 /* 2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 4 * Copyright (C) 2009 Google, Inc. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef BackForwardList_h 29 #define BackForwardList_h 30 31 #include <wtf/Forward.h> 32 #include <wtf/RefCounted.h> 33 34 namespace WebCore { 35 36 class HistoryItem; 37 38 // FIXME: Rename this class to BackForwardClient, and rename the 39 // getter in Page accordingly. 40 class BackForwardList : public RefCounted<BackForwardList> { 41 public: 42 virtual ~BackForwardList() 43 { 44 } 45 46 virtual void addItem(PassRefPtr<HistoryItem>) = 0; 47 48 virtual void goToItem(HistoryItem*) = 0; 49 50 virtual HistoryItem* itemAtIndex(int) = 0; 51 virtual int backListCount() = 0; 52 virtual int forwardListCount() = 0; 53 54 virtual bool isActive() = 0; 55 56 virtual void close() = 0; 57 58 #if ENABLE(WML) 59 // FIXME: Rename this to just "clear" and change it so it's not 60 // WML-specific. This is the same operation as clearBackForwardList 61 // in the layout test controller; it would be reasonable to have it 62 // here even though HTML DOM interfaces don't require it. 63 virtual void clearWMLPageHistory() = 0; 64 #endif 65 66 // FIXME: Delete these once all callers are using BackForwardController 67 // instead of calling this directly. 68 HistoryItem* backItem() { return itemAtIndex(-1); } 69 HistoryItem* currentItem() { return itemAtIndex(0); } 70 HistoryItem* forwardItem() { return itemAtIndex(1); } 71 }; 72 73 } // namespace WebCore 74 75 #endif // BackForwardList_h 76
