mirror of
https://github.com/classilla/tenfourfox.git
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238 lines
6.9 KiB
C++
238 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "DocumentTimeline.h"
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#include "mozilla/dom/DocumentTimelineBinding.h"
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#include "AnimationUtils.h"
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#include "nsContentUtils.h"
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#include "nsDOMMutationObserver.h"
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#include "nsDOMNavigationTiming.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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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(DocumentTimeline)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DocumentTimeline,
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AnimationTimeline)
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tmp->UnregisterFromRefreshDriver();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DocumentTimeline,
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AnimationTimeline)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(DocumentTimeline,
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AnimationTimeline)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DocumentTimeline)
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NS_INTERFACE_MAP_END_INHERITING(AnimationTimeline)
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NS_IMPL_ADDREF_INHERITED(DocumentTimeline, AnimationTimeline)
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NS_IMPL_RELEASE_INHERITED(DocumentTimeline, AnimationTimeline)
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JSObject*
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DocumentTimeline::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return DocumentTimelineBinding::Wrap(aCx, this, aGivenProto);
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}
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Nullable<TimeDuration>
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DocumentTimeline::GetCurrentTime() const
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{
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return ToTimelineTime(GetCurrentTimeStamp());
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}
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TimeStamp
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DocumentTimeline::GetCurrentTimeStamp() const
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{
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nsRefreshDriver* refreshDriver = GetRefreshDriver();
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TimeStamp refreshTime = refreshDriver
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? refreshDriver->MostRecentRefresh()
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: TimeStamp();
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// Always return the same object to benefit from return-value optimization.
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TimeStamp result = !refreshTime.IsNull()
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? refreshTime
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: mLastRefreshDriverTime;
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// If we don't have a refresh driver and we've never had one use the
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// timeline's zero time.
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if (result.IsNull()) {
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RefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (timing) {
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result = timing->GetNavigationStartTimeStamp();
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// Also, let this time represent the current refresh time. This way
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// we'll save it as the last refresh time and skip looking up
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// navigation timing each time.
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refreshTime = result;
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}
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}
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if (!refreshTime.IsNull()) {
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mLastRefreshDriverTime = refreshTime;
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}
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return result;
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}
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Nullable<TimeDuration>
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DocumentTimeline::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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RefPtr<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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void
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DocumentTimeline::NotifyAnimationUpdated(Animation& aAnimation)
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{
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AnimationTimeline::NotifyAnimationUpdated(aAnimation);
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if (!mIsObservingRefreshDriver) {
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nsRefreshDriver* refreshDriver = GetRefreshDriver();
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if (refreshDriver) {
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refreshDriver->AddRefreshObserver(this, Flush_Style);
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mIsObservingRefreshDriver = true;
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}
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}
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}
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void
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DocumentTimeline::WillRefresh(mozilla::TimeStamp aTime)
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{
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MOZ_ASSERT(mIsObservingRefreshDriver);
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MOZ_ASSERT(GetRefreshDriver(),
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"Should be able to reach refresh driver from within WillRefresh");
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bool needsTicks = false;
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nsTArray<Animation*> animationsToRemove(mAnimations.Count());
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nsAutoAnimationMutationBatch mb(mDocument);
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for (Animation* animation = mAnimationOrder.getFirst(); animation;
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animation = animation->getNext()) {
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// Skip any animations that are longer need associated with this timeline.
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if (animation->GetTimeline() != this) {
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// If animation has some other timeline, it better not be also in the
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// animation list of this timeline object!
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MOZ_ASSERT(!animation->GetTimeline());
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animationsToRemove.AppendElement(animation);
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continue;
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}
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needsTicks |= animation->NeedsTicks();
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// Even if |animation| doesn't need future ticks, we should still
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// Tick it this time around since it might just need a one-off tick in
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// order to dispatch events.
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animation->Tick();
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if (!animation->IsRelevant() && !animation->NeedsTicks()) {
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animationsToRemove.AppendElement(animation);
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}
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}
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for (Animation* animation : animationsToRemove) {
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RemoveAnimation(animation);
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}
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if (!needsTicks) {
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// We already assert that GetRefreshDriver() is non-null at the beginning
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// of this function but we check it again here to be sure that ticking
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// animations does not have any side effects that cause us to lose the
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// connection with the refresh driver, such as triggering the destruction
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// of mDocument's PresShell.
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MOZ_ASSERT(GetRefreshDriver(),
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"Refresh driver should still be valid at end of WillRefresh");
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UnregisterFromRefreshDriver();
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}
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}
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void
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DocumentTimeline::NotifyRefreshDriverCreated(nsRefreshDriver* aDriver)
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{
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MOZ_ASSERT(!mIsObservingRefreshDriver,
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"Timeline should not be observing the refresh driver before"
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" it is created");
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if (!mAnimationOrder.isEmpty()) {
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aDriver->AddRefreshObserver(this, Flush_Style);
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mIsObservingRefreshDriver = true;
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}
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}
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void
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DocumentTimeline::NotifyRefreshDriverDestroying(nsRefreshDriver* aDriver)
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{
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if (!mIsObservingRefreshDriver) {
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return;
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}
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aDriver->RemoveRefreshObserver(this, Flush_Style);
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mIsObservingRefreshDriver = false;
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}
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TimeStamp
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DocumentTimeline::ToTimeStamp(const TimeDuration& aTimeDuration) const
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{
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TimeStamp result;
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RefPtr<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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nsRefreshDriver*
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DocumentTimeline::GetRefreshDriver() const
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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 nullptr;
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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 nullptr;
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}
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return presContext->RefreshDriver();
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}
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void
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DocumentTimeline::UnregisterFromRefreshDriver()
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{
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if (!mIsObservingRefreshDriver) {
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return;
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}
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nsRefreshDriver* refreshDriver = GetRefreshDriver();
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if (!refreshDriver) {
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return;
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}
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refreshDriver->RemoveRefreshObserver(this, Flush_Style);
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mIsObservingRefreshDriver = false;
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}
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} // namespace dom
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} // namespace mozilla
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