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 "Event.h" 35 #include "Timer.h" 36 #include <wtf/Forward.h> 37 #include <wtf/Noncopyable.h> 38 #include <wtf/OwnPtr.h> 39 #include <wtf/PassOwnPtr.h> 40 #include <wtf/PassRefPtr.h> 41 42 namespace WebCore { 43 44 class FormState; 45 class FormSubmission; 46 class Frame; 47 class ScheduledNavigation; 48 class SecurityOrigin; 49 50 struct FrameLoadRequest; 51 52 class NavigationDisablerForBeforeUnload { 53 WTF_MAKE_NONCOPYABLE(NavigationDisablerForBeforeUnload); 54 55 public: NavigationDisablerForBeforeUnload()56 NavigationDisablerForBeforeUnload() 57 { 58 s_navigationDisableCount++; 59 } ~NavigationDisablerForBeforeUnload()60 ~NavigationDisablerForBeforeUnload() 61 { 62 ASSERT(s_navigationDisableCount); 63 s_navigationDisableCount--; 64 } isNavigationAllowed()65 static bool isNavigationAllowed() { return !s_navigationDisableCount; } 66 67 private: 68 static unsigned s_navigationDisableCount; 69 }; 70 71 class NavigationScheduler { 72 WTF_MAKE_NONCOPYABLE(NavigationScheduler); 73 74 public: 75 NavigationScheduler(Frame*); 76 ~NavigationScheduler(); 77 78 bool redirectScheduledDuringLoad(); 79 bool locationChangePending(); 80 81 void scheduleRedirect(double delay, const String& url); 82 void scheduleLocationChange(PassRefPtr<SecurityOrigin>, const String& url, const String& referrer, bool lockHistory = true, bool lockBackForwardList = true); 83 void scheduleFormSubmission(PassRefPtr<FormSubmission>); 84 void scheduleRefresh(); 85 void scheduleHistoryNavigation(int steps); 86 87 void startTimer(); 88 89 void cancel(bool newLoadInProgress = false); 90 void clear(); 91 92 private: 93 bool shouldScheduleNavigation() const; 94 bool shouldScheduleNavigation(const String& url) const; 95 96 void timerFired(Timer<NavigationScheduler>*); 97 void schedule(PassOwnPtr<ScheduledNavigation>); 98 99 static bool mustLockBackForwardList(Frame* targetFrame); 100 101 Frame* m_frame; 102 Timer<NavigationScheduler> m_timer; 103 OwnPtr<ScheduledNavigation> m_redirect; 104 }; 105 106 } // namespace WebCore 107 108 #endif // NavigationScheduler_h 109