1 /* 2 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 4 * Copyright (C) 2009 Adam Barth. 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 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 16 * its contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef NavigationScheduler_h 32 #define NavigationScheduler_h 33 34 #include "platform/Timer.h" 35 #include "wtf/Forward.h" 36 #include "wtf/HashMap.h" 37 #include "wtf/Noncopyable.h" 38 #include "wtf/OwnPtr.h" 39 #include "wtf/PassOwnPtr.h" 40 #include "wtf/PassRefPtr.h" 41 #include "wtf/text/WTFString.h" 42 43 namespace WebCore { 44 45 class Document; 46 class FormSubmission; 47 class Frame; 48 class ScheduledNavigation; 49 50 class NavigationDisablerForBeforeUnload { 51 WTF_MAKE_NONCOPYABLE(NavigationDisablerForBeforeUnload); 52 53 public: NavigationDisablerForBeforeUnload()54 NavigationDisablerForBeforeUnload() 55 { 56 s_navigationDisableCount++; 57 } ~NavigationDisablerForBeforeUnload()58 ~NavigationDisablerForBeforeUnload() 59 { 60 ASSERT(s_navigationDisableCount); 61 s_navigationDisableCount--; 62 } isNavigationAllowed()63 static bool isNavigationAllowed() { return !s_navigationDisableCount; } 64 65 private: 66 static unsigned s_navigationDisableCount; 67 }; 68 69 class NavigationScheduler { 70 WTF_MAKE_NONCOPYABLE(NavigationScheduler); 71 72 public: 73 explicit NavigationScheduler(Frame*); 74 ~NavigationScheduler(); 75 76 bool locationChangePending(); 77 78 void scheduleRedirect(double delay, const String& url); 79 void scheduleLocationChange(Document*, const String& url, const String& referrer, bool lockBackForwardList = true); 80 void scheduleFormSubmission(PassRefPtr<FormSubmission>); 81 void scheduleRefresh(); 82 void scheduleHistoryNavigation(int steps); 83 84 void startTimer(); 85 86 void cancel(); 87 void clear(); 88 89 private: 90 bool shouldScheduleNavigation() const; 91 bool shouldScheduleNavigation(const String& url) const; 92 93 void timerFired(Timer<NavigationScheduler>*); 94 void schedule(PassOwnPtr<ScheduledNavigation>); 95 96 static bool mustLockBackForwardList(Frame* targetFrame); 97 98 Frame* m_frame; 99 Timer<NavigationScheduler> m_timer; 100 OwnPtr<ScheduledNavigation> m_redirect; 101 }; 102 103 } // namespace WebCore 104 105 #endif // NavigationScheduler_h 106