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109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AnimationTimeline.h"
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#include "mozilla/dom/AnimationTimelineBinding.h"
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#include "AnimationUtils.h"
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#include "nsContentUtils.h"
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#include "nsIPresShell.h"
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#include "nsPresContext.h"
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#include "nsRefreshDriver.h"
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#include "nsDOMNavigationTiming.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(AnimationTimeline, mDocument)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AnimationTimeline, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AnimationTimeline, Release)
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JSObject*
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AnimationTimeline::WrapObject(JSContext* aCx)
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{
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return AnimationTimelineBinding::Wrap(aCx, this);
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}
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Nullable<double>
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AnimationTimeline::GetCurrentTime() const
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{
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return AnimationUtils::TimeDurationToDouble(GetCurrentTimeDuration());
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}
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TimeStamp
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AnimationTimeline::GetCurrentTimeStamp() const
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{
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// Always return the same object to benefit from return-value optimization.
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TimeStamp result = mLastCurrentTime;
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// If we've never been sampled, initialize the current time to the timeline's
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// zero time since that is the time we'll use if we don't have a refresh
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// driver.
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if (result.IsNull()) {
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (!timing) {
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return result;
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}
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result = timing->GetNavigationStartTimeStamp();
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}
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nsIPresShell* presShell = mDocument->GetShell();
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if (MOZ_UNLIKELY(!presShell)) {
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return result;
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}
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nsPresContext* presContext = presShell->GetPresContext();
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if (MOZ_UNLIKELY(!presContext)) {
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return result;
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}
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result = presContext->RefreshDriver()->MostRecentRefresh();
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// FIXME: We would like to assert that:
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// mLastCurrentTime.IsNull() || result >= mLastCurrentTime
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// but due to bug 1043078 this will not be the case when the refresh driver
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// is restored from test control.
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mLastCurrentTime = result;
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return result;
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}
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Nullable<TimeDuration>
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AnimationTimeline::GetCurrentTimeDuration() const
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{
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return ToTimelineTime(GetCurrentTimeStamp());
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}
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Nullable<TimeDuration>
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AnimationTimeline::ToTimelineTime(const TimeStamp& aTimeStamp) const
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{
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Nullable<TimeDuration> result; // Initializes to null
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if (aTimeStamp.IsNull()) {
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return result;
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}
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (MOZ_UNLIKELY(!timing)) {
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return result;
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}
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result.SetValue(aTimeStamp - timing->GetNavigationStartTimeStamp());
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return result;
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}
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TimeStamp
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AnimationTimeline::ToTimeStamp(const TimeDuration& aTimeDuration) const
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{
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TimeStamp result;
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (MOZ_UNLIKELY(!timing)) {
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return result;
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}
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result = timing->GetNavigationStartTimeStamp() + aTimeDuration;
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return result;
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}
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} // namespace dom
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} // namespace mozilla
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