Index: Source/core/page/DOMTimer.cpp |
diff --git a/Source/core/page/DOMTimer.cpp b/Source/core/page/DOMTimer.cpp |
deleted file mode 100644 |
index 16210e59aadf46f125372f0a4c2063a3de11c1fe..0000000000000000000000000000000000000000 |
--- a/Source/core/page/DOMTimer.cpp |
+++ /dev/null |
@@ -1,201 +0,0 @@ |
-/* |
- * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
- * |
- * Redistribution and use in source and binary forms, with or without |
- * modification, are permitted provided that the following conditions |
- * are met: |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. Redistributions in binary form must reproduce the above copyright |
- * notice, this list of conditions and the following disclaimer in the |
- * documentation and/or other materials provided with the distribution. |
- * |
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- * |
- */ |
- |
-#include "config.h" |
-#include "core/page/DOMTimer.h" |
- |
-#include "bindings/v8/ScheduledAction.h" |
-#include "core/dom/ScriptExecutionContext.h" |
-#include "core/inspector/InspectorInstrumentation.h" |
-#include "wtf/CurrentTime.h" |
- |
-using namespace std; |
- |
-namespace WebCore { |
- |
-static const int maxIntervalForUserGestureForwarding = 1000; // One second matches Gecko. |
-static const int maxTimerNestingLevel = 5; |
-static const double oneMillisecond = 0.001; |
-// Chromium uses a minimum timer interval of 4ms. We'd like to go |
-// lower; however, there are poorly coded websites out there which do |
-// create CPU-spinning loops. Using 4ms prevents the CPU from |
-// spinning too busily and provides a balance between CPU spinning and |
-// the smallest possible interval timer. |
-static const double minimumInterval = 0.004; |
- |
-static int timerNestingLevel = 0; |
- |
-static inline bool shouldForwardUserGesture(int interval, int nestingLevel) |
-{ |
- return UserGestureIndicator::processingUserGesture() |
- && interval <= maxIntervalForUserGestureForwarding |
- && nestingLevel == 1; // Gestures should not be forwarded to nested timers. |
-} |
- |
-double DOMTimer::hiddenPageAlignmentInterval() |
-{ |
- // Timers on hidden pages are aligned so that they fire once per |
- // second at most. |
- return 1.0; |
-} |
- |
-double DOMTimer::visiblePageAlignmentInterval() |
-{ |
- // Alignment does not apply to timers on visible pages. |
- return 0; |
-} |
- |
-int DOMTimer::install(ScriptExecutionContext* context, PassOwnPtr<ScheduledAction> action, int timeout, bool singleShot) |
-{ |
- int timeoutID = context->installNewTimeout(action, timeout, singleShot); |
- InspectorInstrumentation::didInstallTimer(context, timeoutID, timeout, singleShot); |
- return timeoutID; |
-} |
- |
-void DOMTimer::removeByID(ScriptExecutionContext* context, int timeoutID) |
-{ |
- context->removeTimeoutByID(timeoutID); |
- InspectorInstrumentation::didRemoveTimer(context, timeoutID); |
-} |
- |
-DOMTimer::DOMTimer(ScriptExecutionContext* context, PassOwnPtr<ScheduledAction> action, int interval, bool singleShot, int timeoutID) |
- : SuspendableTimer(context) |
- , m_timeoutID(timeoutID) |
- , m_nestingLevel(timerNestingLevel + 1) |
- , m_action(action) |
-{ |
- ASSERT(timeoutID > 0); |
- if (shouldForwardUserGesture(interval, m_nestingLevel)) |
- m_userGestureToken = UserGestureIndicator::currentToken(); |
- |
- double intervalMilliseconds = max(oneMillisecond, interval * oneMillisecond); |
- if (intervalMilliseconds < minimumInterval && m_nestingLevel >= maxTimerNestingLevel) |
- intervalMilliseconds = minimumInterval; |
- if (singleShot) |
- startOneShot(intervalMilliseconds); |
- else |
- startRepeating(intervalMilliseconds); |
-} |
- |
-DOMTimer::~DOMTimer() |
-{ |
-} |
- |
-int DOMTimer::timeoutID() const |
-{ |
- return m_timeoutID; |
-} |
- |
-void DOMTimer::fired() |
-{ |
- ScriptExecutionContext* context = scriptExecutionContext(); |
- timerNestingLevel = m_nestingLevel; |
- ASSERT(!context->activeDOMObjectsAreSuspended()); |
- // Only the first execution of a multi-shot timer should get an affirmative user gesture indicator. |
- UserGestureIndicator gestureIndicator(m_userGestureToken.release()); |
- |
- InspectorInstrumentationCookie cookie = InspectorInstrumentation::willFireTimer(context, m_timeoutID); |
- |
- // Simple case for non-one-shot timers. |
- if (isActive()) { |
- if (repeatInterval() && repeatInterval() < minimumInterval) { |
- m_nestingLevel++; |
- if (m_nestingLevel >= maxTimerNestingLevel) |
- augmentRepeatInterval(minimumInterval - repeatInterval()); |
- } |
- |
- // No access to member variables after this point, it can delete the timer. |
- m_action->execute(context); |
- |
- InspectorInstrumentation::didFireTimer(cookie); |
- |
- return; |
- } |
- |
- // Delete timer before executing the action for one-shot timers. |
- OwnPtr<ScheduledAction> action = m_action.release(); |
- |
- // This timer is being deleted; no access to member variables allowed after this point. |
- context->removeTimeoutByID(m_timeoutID); |
- |
- action->execute(context); |
- |
- InspectorInstrumentation::didFireTimer(cookie); |
- |
- timerNestingLevel = 0; |
-} |
- |
-void DOMTimer::contextDestroyed() |
-{ |
- SuspendableTimer::contextDestroyed(); |
-} |
- |
-void DOMTimer::stop() |
-{ |
- SuspendableTimer::stop(); |
- // Need to release JS objects potentially protected by ScheduledAction |
- // because they can form circular references back to the ScriptExecutionContext |
- // which will cause a memory leak. |
- m_action.clear(); |
-} |
- |
-double DOMTimer::alignedFireTime(double fireTime) const |
-{ |
- double alignmentInterval = scriptExecutionContext()->timerAlignmentInterval(); |
- if (alignmentInterval) { |
- double currentTime = monotonicallyIncreasingTime(); |
- if (fireTime <= currentTime) |
- return fireTime; |
- |
- // When a repeating timer is scheduled for exactly the |
- // background page alignment interval, because it's impossible |
- // for the timer to be rescheduled instantaneously, it misses |
- // every other fire time. Avoid this by looking at the next |
- // fire time rounded both down and up. |
- |
- double alignedTimeRoundedDown = floor(fireTime / alignmentInterval) * alignmentInterval; |
- double alignedTimeRoundedUp = ceil(fireTime / alignmentInterval) * alignmentInterval; |
- |
- // If the version rounded down is in the past, discard it |
- // immediately. |
- |
- if (alignedTimeRoundedDown <= currentTime) |
- return alignedTimeRoundedUp; |
- |
- // Only use the rounded-down time if it's within a certain |
- // tolerance of the fire time. This avoids speeding up timers |
- // on background pages in the common case. |
- |
- if (fireTime - alignedTimeRoundedDown < minimumInterval) |
- return alignedTimeRoundedDown; |
- |
- return alignedTimeRoundedUp; |
- } |
- |
- return fireTime; |
-} |
- |
-} // namespace WebCore |