2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
4 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
5 * Copyright (C) 2009 Adam Barth. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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33 #include "NavigationScheduler.h"
35 #include "BackForwardController.h"
36 #include "DOMWindow.h"
37 #include "DocumentLoader.h"
39 #include "FormState.h"
40 #include "FormSubmission.h"
42 #include "FrameLoadRequest.h"
43 #include "FrameLoader.h"
44 #include "FrameLoaderStateMachine.h"
45 #include "HTMLFormElement.h"
46 #include "HTMLFrameOwnerElement.h"
47 #include "HistoryItem.h"
49 #include "UserGestureIndicator.h"
50 #include <wtf/CurrentTime.h>
54 unsigned NavigationDisablerForBeforeUnload::s_navigationDisableCount = 0;
56 class ScheduledNavigation {
57 WTF_MAKE_NONCOPYABLE(ScheduledNavigation); WTF_MAKE_FAST_ALLOCATED;
59 ScheduledNavigation(double delay, bool lockHistory, bool lockBackForwardList, bool wasDuringLoad, bool isLocationChange)
61 , m_lockHistory(lockHistory)
62 , m_lockBackForwardList(lockBackForwardList)
63 , m_wasDuringLoad(wasDuringLoad)
64 , m_isLocationChange(isLocationChange)
65 , m_wasUserGesture(ScriptController::processingUserGesture())
68 virtual ~ScheduledNavigation() { }
70 virtual void fire(Frame*) = 0;
72 virtual bool shouldStartTimer(Frame*) { return true; }
73 virtual void didStartTimer(Frame*, Timer<NavigationScheduler>*) { }
74 virtual void didStopTimer(Frame*, bool /* newLoadInProgress */) { }
76 double delay() const { return m_delay; }
77 bool lockHistory() const { return m_lockHistory; }
78 bool lockBackForwardList() const { return m_lockBackForwardList; }
79 bool wasDuringLoad() const { return m_wasDuringLoad; }
80 bool isLocationChange() const { return m_isLocationChange; }
81 bool wasUserGesture() const { return m_wasUserGesture; }
84 void clearUserGesture() { m_wasUserGesture = false; }
89 bool m_lockBackForwardList;
91 bool m_isLocationChange;
92 bool m_wasUserGesture;
95 class ScheduledURLNavigation : public ScheduledNavigation {
97 ScheduledURLNavigation(double delay, PassRefPtr<SecurityOrigin> securityOrigin, const String& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool duringLoad, bool isLocationChange)
98 : ScheduledNavigation(delay, lockHistory, lockBackForwardList, duringLoad, isLocationChange)
99 , m_securityOrigin(securityOrigin)
101 , m_referrer(referrer)
102 , m_haveToldClient(false)
106 virtual void fire(Frame* frame)
108 UserGestureIndicator gestureIndicator(wasUserGesture() ? DefinitelyProcessingUserGesture : DefinitelyNotProcessingUserGesture);
109 frame->loader()->changeLocation(m_securityOrigin, KURL(ParsedURLString, m_url), m_referrer, lockHistory(), lockBackForwardList(), false);
112 virtual void didStartTimer(Frame* frame, Timer<NavigationScheduler>* timer)
114 if (m_haveToldClient)
116 m_haveToldClient = true;
117 frame->loader()->clientRedirected(KURL(ParsedURLString, m_url), delay(), currentTime() + timer->nextFireInterval(), lockBackForwardList());
120 virtual void didStopTimer(Frame* frame, bool newLoadInProgress)
122 if (!m_haveToldClient)
124 frame->loader()->clientRedirectCancelledOrFinished(newLoadInProgress);
127 SecurityOrigin* securityOrigin() const { return m_securityOrigin.get(); }
128 String url() const { return m_url; }
129 String referrer() const { return m_referrer; }
132 RefPtr<SecurityOrigin> m_securityOrigin;
135 bool m_haveToldClient;
138 class ScheduledRedirect : public ScheduledURLNavigation {
140 ScheduledRedirect(double delay, PassRefPtr<SecurityOrigin> securityOrigin, const String& url, bool lockHistory, bool lockBackForwardList)
141 : ScheduledURLNavigation(delay, securityOrigin, url, String(), lockHistory, lockBackForwardList, false, false)
146 virtual bool shouldStartTimer(Frame* frame) { return frame->loader()->allAncestorsAreComplete(); }
149 class ScheduledLocationChange : public ScheduledURLNavigation {
151 ScheduledLocationChange(PassRefPtr<SecurityOrigin> securityOrigin, const String& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool duringLoad)
152 : ScheduledURLNavigation(0.0, securityOrigin, url, referrer, lockHistory, lockBackForwardList, duringLoad, true) { }
155 class ScheduledRefresh : public ScheduledURLNavigation {
157 ScheduledRefresh(PassRefPtr<SecurityOrigin> securityOrigin, const String& url, const String& referrer)
158 : ScheduledURLNavigation(0.0, securityOrigin, url, referrer, true, true, false, true)
162 virtual void fire(Frame* frame)
164 UserGestureIndicator gestureIndicator(wasUserGesture() ? DefinitelyProcessingUserGesture : DefinitelyNotProcessingUserGesture);
165 frame->loader()->changeLocation(securityOrigin(), KURL(ParsedURLString, url()), referrer(), lockHistory(), lockBackForwardList(), true);
169 class ScheduledHistoryNavigation : public ScheduledNavigation {
171 explicit ScheduledHistoryNavigation(int historySteps)
172 : ScheduledNavigation(0, false, false, false, true)
173 , m_historySteps(historySteps)
177 virtual void fire(Frame* frame)
179 UserGestureIndicator gestureIndicator(wasUserGesture() ? DefinitelyProcessingUserGesture : DefinitelyNotProcessingUserGesture);
181 if (!m_historySteps) {
182 // Special case for go(0) from a frame -> reload only the frame
183 // To follow Firefox and IE's behavior, history reload can only navigate the self frame.
184 frame->loader()->urlSelected(frame->document()->url(), "_self", 0, lockHistory(), lockBackForwardList(), SendReferrer);
187 // go(i!=0) from a frame navigates into the history of the frame only,
188 // in both IE and NS (but not in Mozilla). We can't easily do that.
189 frame->page()->backForward()->goBackOrForward(m_historySteps);
196 class ScheduledFormSubmission : public ScheduledNavigation {
198 ScheduledFormSubmission(PassRefPtr<FormSubmission> submission, bool lockBackForwardList, bool duringLoad)
199 : ScheduledNavigation(0, submission->lockHistory(), lockBackForwardList, duringLoad, true)
200 , m_submission(submission)
201 , m_haveToldClient(false)
203 ASSERT(m_submission->state());
206 virtual void fire(Frame* frame)
208 UserGestureIndicator gestureIndicator(wasUserGesture() ? DefinitelyProcessingUserGesture : DefinitelyNotProcessingUserGesture);
210 // The submitForm function will find a target frame before using the redirection timer.
211 // Now that the timer has fired, we need to repeat the security check which normally is done when
212 // selecting a target, in case conditions have changed. Other code paths avoid this by targeting
213 // without leaving a time window. If we fail the check just silently drop the form submission.
214 Frame* requestingFrame = m_submission->state()->sourceFrame();
215 if (!requestingFrame->loader()->shouldAllowNavigation(frame))
217 FrameLoadRequest frameRequest(requestingFrame->document()->securityOrigin());
218 m_submission->populateFrameLoadRequest(frameRequest);
219 frame->loader()->loadFrameRequest(frameRequest, lockHistory(), lockBackForwardList(), m_submission->event(), m_submission->state(), SendReferrer);
222 virtual void didStartTimer(Frame* frame, Timer<NavigationScheduler>* timer)
224 if (m_haveToldClient)
226 m_haveToldClient = true;
227 frame->loader()->clientRedirected(m_submission->requestURL(), delay(), currentTime() + timer->nextFireInterval(), lockBackForwardList());
230 virtual void didStopTimer(Frame* frame, bool newLoadInProgress)
232 if (!m_haveToldClient)
234 frame->loader()->clientRedirectCancelledOrFinished(newLoadInProgress);
238 RefPtr<FormSubmission> m_submission;
239 bool m_haveToldClient;
242 NavigationScheduler::NavigationScheduler(Frame* frame)
244 , m_timer(this, &NavigationScheduler::timerFired)
248 NavigationScheduler::~NavigationScheduler()
252 bool NavigationScheduler::redirectScheduledDuringLoad()
254 return m_redirect && m_redirect->wasDuringLoad();
257 bool NavigationScheduler::locationChangePending()
259 return m_redirect && m_redirect->isLocationChange();
262 void NavigationScheduler::clear()
268 inline bool NavigationScheduler::shouldScheduleNavigation() const
270 return m_frame->page();
273 inline bool NavigationScheduler::shouldScheduleNavigation(const String& url) const
275 return shouldScheduleNavigation() && (protocolIsJavaScript(url) || NavigationDisablerForBeforeUnload::isNavigationAllowed());
278 void NavigationScheduler::scheduleRedirect(double delay, const String& url)
280 if (!shouldScheduleNavigation(url))
282 if (delay < 0 || delay > INT_MAX / 1000)
287 // We want a new back/forward list item if the refresh timeout is > 1 second.
288 if (!m_redirect || delay <= m_redirect->delay())
289 schedule(adoptPtr(new ScheduledRedirect(delay, m_frame->document()->securityOrigin(), url, true, delay <= 1)));
292 bool NavigationScheduler::mustLockBackForwardList(Frame* targetFrame)
294 // Non-user navigation before the page has finished firing onload should not create a new back/forward item.
295 // See https://webkit.org/b/42861 for the original motivation for this.
296 if (!ScriptController::processingUserGesture() && targetFrame->loader()->documentLoader() && !targetFrame->loader()->documentLoader()->wasOnloadHandled())
299 // Navigation of a subframe during loading of an ancestor frame does not create a new back/forward item.
300 // The definition of "during load" is any time before all handlers for the load event have been run.
301 // See https://bugs.webkit.org/show_bug.cgi?id=14957 for the original motivation for this.
302 for (Frame* ancestor = targetFrame->tree()->parent(); ancestor; ancestor = ancestor->tree()->parent()) {
303 Document* document = ancestor->document();
304 if (!ancestor->loader()->isComplete() || (document && document->processingLoadEvent()))
310 void NavigationScheduler::scheduleLocationChange(PassRefPtr<SecurityOrigin> securityOrigin, const String& url, const String& referrer, bool lockHistory, bool lockBackForwardList)
312 if (!shouldScheduleNavigation(url))
317 lockBackForwardList = lockBackForwardList || mustLockBackForwardList(m_frame);
319 FrameLoader* loader = m_frame->loader();
321 // If the URL we're going to navigate to is the same as the current one, except for the
322 // fragment part, we don't need to schedule the location change.
323 KURL parsedURL(ParsedURLString, url);
324 if (parsedURL.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(m_frame->document()->url(), parsedURL)) {
325 loader->changeLocation(securityOrigin, loader->completeURL(url), referrer, lockHistory, lockBackForwardList);
329 // Handle a location change of a page with no document as a special case.
330 // This may happen when a frame changes the location of another frame.
331 bool duringLoad = !loader->stateMachine()->committedFirstRealDocumentLoad();
333 schedule(adoptPtr(new ScheduledLocationChange(securityOrigin, url, referrer, lockHistory, lockBackForwardList, duringLoad)));
336 void NavigationScheduler::scheduleFormSubmission(PassRefPtr<FormSubmission> submission)
338 ASSERT(m_frame->page());
340 // FIXME: Do we need special handling for form submissions where the URL is the same
341 // as the current one except for the fragment part? See scheduleLocationChange above.
343 // Handle a location change of a page with no document as a special case.
344 // This may happen when a frame changes the location of another frame.
345 bool duringLoad = !m_frame->loader()->stateMachine()->committedFirstRealDocumentLoad();
347 // If this is a child frame and the form submission was triggered by a script, lock the back/forward list
348 // to match IE and Opera.
349 // See https://bugs.webkit.org/show_bug.cgi?id=32383 for the original motivation for this.
350 bool lockBackForwardList = mustLockBackForwardList(m_frame)
351 || (submission->state()->formSubmissionTrigger() == SubmittedByJavaScript
352 && m_frame->tree()->parent() && !ScriptController::processingUserGesture());
354 schedule(adoptPtr(new ScheduledFormSubmission(submission, lockBackForwardList, duringLoad)));
357 void NavigationScheduler::scheduleRefresh()
359 if (!shouldScheduleNavigation())
361 const KURL& url = m_frame->document()->url();
365 schedule(adoptPtr(new ScheduledRefresh(m_frame->document()->securityOrigin(), url.string(), m_frame->loader()->outgoingReferrer())));
368 void NavigationScheduler::scheduleHistoryNavigation(int steps)
370 if (!shouldScheduleNavigation())
373 // Invalid history navigations (such as history.forward() during a new load) have the side effect of cancelling any scheduled
374 // redirects. We also avoid the possibility of cancelling the current load by avoiding the scheduled redirection altogether.
375 BackForwardController* backForward = m_frame->page()->backForward();
376 if (steps > backForward->forwardCount() || -steps > backForward->backCount()) {
381 // In all other cases, schedule the history traversal to occur asynchronously.
382 schedule(adoptPtr(new ScheduledHistoryNavigation(steps)));
385 void NavigationScheduler::timerFired(Timer<NavigationScheduler>*)
387 if (!m_frame->page())
389 if (m_frame->page()->defersLoading())
392 OwnPtr<ScheduledNavigation> redirect(m_redirect.release());
393 redirect->fire(m_frame);
396 void NavigationScheduler::schedule(PassOwnPtr<ScheduledNavigation> redirect)
398 ASSERT(m_frame->page());
400 // If a redirect was scheduled during a load, then stop the current load.
401 // Otherwise when the current load transitions from a provisional to a
402 // committed state, pending redirects may be cancelled.
403 if (redirect->wasDuringLoad()) {
404 if (DocumentLoader* provisionalDocumentLoader = m_frame->loader()->provisionalDocumentLoader())
405 provisionalDocumentLoader->stopLoading();
406 m_frame->loader()->stopLoading(UnloadEventPolicyUnloadAndPageHide);
410 m_redirect = redirect;
412 if (!m_frame->loader()->isComplete() && m_redirect->isLocationChange())
413 m_frame->loader()->completed();
418 void NavigationScheduler::startTimer()
423 ASSERT(m_frame->page());
424 if (m_timer.isActive())
426 if (!m_redirect->shouldStartTimer(m_frame))
429 m_timer.startOneShot(m_redirect->delay());
430 m_redirect->didStartTimer(m_frame, &m_timer);
433 void NavigationScheduler::cancel(bool newLoadInProgress)
437 OwnPtr<ScheduledNavigation> redirect(m_redirect.release());
439 redirect->didStopTimer(m_frame, newLoadInProgress);
442 } // namespace WebCore