bd2759cad0
This patch templatizes the type of Animation stored in an AnimationCollection. This allows us to remove a number AsCSSAnimation() calls in nsAnimationManager. This patch also removes the AnimationPtrArray typedef. In its place we introduce OwningCSSAnimationPtrArray and OwningCSSTransitionPtrArray but we don't use these as widely. There was some comment previously that the typedefs in animation code make it hard to read, particularly when these typedefs don't make it clear if the data type is an owning reference or not. In doing this we need to templatize CommonAnimationManager as well and move the implementation of its (few) methods to the header file. We may be able to remove the need for templatizing CommonAnimationManager later in this patch series depending on how we ultimately decide to handle the lifetime of AnimationCollection objects. CommonAnimationManager::GetAnimationCollection is a bit messy but this will be significantly tidied up in subsequent patches in this series. MozReview-Commit-ID: 3ywatY53pRR
798 lines
31 KiB
C++
798 lines
31 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Code to start and animate CSS transitions. */
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#include "nsTransitionManager.h"
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#include "nsAnimationManager.h"
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#include "mozilla/dom/CSSTransitionBinding.h"
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#include "nsIContent.h"
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#include "nsStyleContext.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/TimeStamp.h"
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#include "nsRefreshDriver.h"
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#include "nsRuleProcessorData.h"
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#include "nsRuleWalker.h"
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#include "nsCSSPropertySet.h"
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#include "mozilla/EffectCompositor.h"
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#include "mozilla/EffectSet.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/StyleAnimationValue.h"
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#include "mozilla/dom/DocumentTimeline.h"
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#include "mozilla/dom/Element.h"
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#include "nsIFrame.h"
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#include "Layers.h"
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#include "FrameLayerBuilder.h"
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#include "nsCSSProps.h"
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#include "nsCSSPseudoElements.h"
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#include "nsDisplayList.h"
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#include "nsStyleChangeList.h"
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#include "nsStyleSet.h"
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#include "mozilla/RestyleManagerHandle.h"
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#include "mozilla/RestyleManagerHandleInlines.h"
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#include "nsDOMMutationObserver.h"
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using mozilla::TimeStamp;
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using mozilla::TimeDuration;
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using mozilla::dom::Animation;
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using mozilla::dom::KeyframeEffectReadOnly;
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using namespace mozilla;
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using namespace mozilla::css;
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double
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ElementPropertyTransition::CurrentValuePortion() const
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{
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MOZ_ASSERT(!GetLocalTime().IsNull(),
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"Getting the value portion of an animation that's not being "
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"sampled");
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// Transitions use a fill mode of 'backwards' so GetComputedTiming will
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// never return a null time progress due to being *before* the animation
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// interval. However, it might be possible that we're behind on flushing
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// causing us to get called *after* the animation interval. So, just in
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// case, we override the fill mode to 'both' to ensure the progress
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// is never null.
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TimingParams timingToUse = SpecifiedTiming();
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timingToUse.mFill = dom::FillMode::Both;
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ComputedTiming computedTiming = GetComputedTiming(&timingToUse);
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MOZ_ASSERT(!computedTiming.mProgress.IsNull(),
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"Got a null progress for a fill mode of 'both'");
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MOZ_ASSERT(mProperties.Length() == 1,
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"Should have one animation property for a transition");
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MOZ_ASSERT(mProperties[0].mSegments.Length() == 1,
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"Animation property should have one segment for a transition");
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return ComputedTimingFunction::GetPortion(
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mProperties[0].mSegments[0].mTimingFunction,
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computedTiming.mProgress.Value());
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}
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////////////////////////// CSSTransition ////////////////////////////
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JSObject*
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CSSTransition::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return dom::CSSTransitionBinding::Wrap(aCx, this, aGivenProto);
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}
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void
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CSSTransition::GetTransitionProperty(nsString& aRetVal) const
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{
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// Once we make the effect property settable (bug 1049975) we will need
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// to store the transition property on the CSSTransition itself but for
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// now we can just query the effect.
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MOZ_ASSERT(mEffect && mEffect->AsTransition(),
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"Transitions should have a transition effect");
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nsCSSProperty prop = mEffect->AsTransition()->TransitionProperty();
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aRetVal = NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(prop));
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}
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AnimationPlayState
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CSSTransition::PlayStateFromJS() const
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{
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FlushStyle();
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return Animation::PlayStateFromJS();
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}
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void
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CSSTransition::PlayFromJS(ErrorResult& aRv)
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{
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FlushStyle();
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Animation::PlayFromJS(aRv);
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}
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void
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CSSTransition::UpdateTiming(SeekFlag aSeekFlag, SyncNotifyFlag aSyncNotifyFlag)
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{
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if (mNeedsNewAnimationIndexWhenRun &&
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PlayState() != AnimationPlayState::Idle) {
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mAnimationIndex = sNextAnimationIndex++;
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mNeedsNewAnimationIndexWhenRun = false;
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}
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Animation::UpdateTiming(aSeekFlag, aSyncNotifyFlag);
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}
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void
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CSSTransition::QueueEvents()
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{
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AnimationPlayState playState = PlayState();
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bool newlyFinished = !mWasFinishedOnLastTick &&
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playState == AnimationPlayState::Finished;
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mWasFinishedOnLastTick = playState == AnimationPlayState::Finished;
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if (!newlyFinished || !mEffect || !mOwningElement.IsSet()) {
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return;
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}
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dom::Element* owningElement;
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CSSPseudoElementType owningPseudoType;
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mOwningElement.GetElement(owningElement, owningPseudoType);
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MOZ_ASSERT(owningElement, "Owning element should be set");
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// Do not queue any event for disabled properties. This could happen
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// if the property has a default value which derives value from other
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// property, e.g. color.
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nsCSSProperty property = TransitionProperty();
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if (!nsCSSProps::IsEnabled(property, nsCSSProps::eEnabledForAllContent) &&
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(!nsContentUtils::IsSystemPrincipal(owningElement->NodePrincipal()) ||
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!nsCSSProps::IsEnabled(property, nsCSSProps::eEnabledInChrome))) {
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return;
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}
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nsPresContext* presContext = mOwningElement.GetRenderedPresContext();
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if (!presContext) {
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return;
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}
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nsTransitionManager* manager = presContext->TransitionManager();
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manager->QueueEvent(TransitionEventInfo(owningElement, owningPseudoType,
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property,
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mEffect->GetComputedTiming()
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.mDuration,
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AnimationTimeToTimeStamp(EffectEnd()),
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this));
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}
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void
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CSSTransition::Tick()
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{
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Animation::Tick();
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QueueEvents();
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}
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nsCSSProperty
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CSSTransition::TransitionProperty() const
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{
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// FIXME: Once we support replacing/removing the effect (bug 1049975)
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// we'll need to store the original transition property so we keep
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// returning the same value in that case.
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dom::KeyframeEffectReadOnly* effect = GetEffect();
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MOZ_ASSERT(effect && effect->AsTransition(),
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"Transition should have a transition effect");
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return effect->AsTransition()->TransitionProperty();
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}
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bool
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CSSTransition::HasLowerCompositeOrderThan(const CSSTransition& aOther) const
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{
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MOZ_ASSERT(IsTiedToMarkup() && aOther.IsTiedToMarkup(),
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"Should only be called for CSS transitions that are sorted "
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"as CSS transitions (i.e. tied to CSS markup)");
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// 0. Object-equality case
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if (&aOther == this) {
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return false;
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}
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// 1. Sort by document order
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if (!mOwningElement.Equals(aOther.mOwningElement)) {
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return mOwningElement.LessThan(aOther.mOwningElement);
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}
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// 2. (Same element and pseudo): Sort by transition generation
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if (mAnimationIndex != aOther.mAnimationIndex) {
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return mAnimationIndex < aOther.mAnimationIndex;
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}
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// 3. (Same transition generation): Sort by transition property
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return nsCSSProps::GetStringValue(TransitionProperty()) <
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nsCSSProps::GetStringValue(aOther.TransitionProperty());
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}
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////////////////////////// nsTransitionManager ////////////////////////////
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NS_IMPL_CYCLE_COLLECTION(nsTransitionManager, mEventDispatcher)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsTransitionManager, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsTransitionManager, Release)
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void
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nsTransitionManager::StyleContextChanged(dom::Element *aElement,
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nsStyleContext *aOldStyleContext,
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RefPtr<nsStyleContext>* aNewStyleContext /* inout */)
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{
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nsStyleContext* newStyleContext = *aNewStyleContext;
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NS_PRECONDITION(aOldStyleContext->GetPseudo() == newStyleContext->GetPseudo(),
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"pseudo type mismatch");
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if (mInAnimationOnlyStyleUpdate) {
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// If we're doing an animation-only style update, return, since the
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// purpose of an animation-only style update is to update only the
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// animation styles so that we don't consider style changes
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// resulting from changes in the animation time for starting a
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// transition.
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return;
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}
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if (!mPresContext->IsDynamic()) {
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// For print or print preview, ignore transitions.
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return;
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}
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if (aOldStyleContext->HasPseudoElementData() !=
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newStyleContext->HasPseudoElementData()) {
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// If the old style context and new style context differ in terms of
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// whether they're inside ::first-letter, ::first-line, or similar,
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// bail. We can't hit this codepath for normal style changes
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// involving moving frames around the boundaries of these
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// pseudo-elements since we don't call StyleContextChanged from
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// ReparentStyleContext. However, we can hit this codepath during
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// the handling of transitions that start across reframes.
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//
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// While there isn't an easy *perfect* way to handle this case, err
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// on the side of missing some transitions that we ought to have
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// rather than having bogus transitions that we shouldn't.
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//
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// We could consider changing this handling, although it's worth
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// thinking about whether the code below could do anything weird in
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// this case.
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return;
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}
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// NOTE: Things in this function (and ConsiderStartingTransition)
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// should never call PeekStyleData because we don't preserve gotten
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// structs across reframes.
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// Return sooner (before the startedAny check below) for the most
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// common case: no transitions specified or running.
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const nsStyleDisplay *disp = newStyleContext->StyleDisplay();
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CSSPseudoElementType pseudoType = newStyleContext->GetPseudoType();
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if (pseudoType != CSSPseudoElementType::NotPseudo) {
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if (pseudoType != CSSPseudoElementType::before &&
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pseudoType != CSSPseudoElementType::after) {
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return;
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}
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NS_ASSERTION((pseudoType == CSSPseudoElementType::before &&
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aElement->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentbefore) ||
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(pseudoType == CSSPseudoElementType::after &&
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aElement->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentafter),
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"Unexpected aElement coming through");
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// Else the element we want to use from now on is the element the
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// :before or :after is attached to.
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aElement = aElement->GetParent()->AsElement();
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}
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CSSTransitionCollection* collection =
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GetAnimationCollection(aElement, pseudoType, false /* aCreateIfNeeded */);
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if (!collection &&
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disp->mTransitionPropertyCount == 1 &&
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disp->mTransitions[0].GetCombinedDuration() <= 0.0f) {
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return;
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}
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MOZ_ASSERT(mPresContext->RestyleManager()->IsGecko(),
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"ServoRestyleManager should not use nsTransitionManager "
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"for transitions");
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if (collection &&
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collection->mCheckGeneration ==
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mPresContext->RestyleManager()->AsGecko()->GetAnimationGeneration()) {
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// When we start a new transition, we immediately post a restyle.
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// If the animation generation on the collection is current, that
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// means *this* is that restyle, since we bump the animation
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// generation on the restyle manager whenever there's a real style
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// change (i.e., one where mInAnimationOnlyStyleUpdate isn't true,
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// which causes us to return above). Thus we shouldn't do anything.
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return;
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}
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if (newStyleContext->GetParent() &&
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newStyleContext->GetParent()->HasPseudoElementData()) {
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// Ignore transitions on things that inherit properties from
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// pseudo-elements.
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// FIXME (Bug 522599): Add tests for this.
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return;
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}
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NS_WARN_IF_FALSE(!nsLayoutUtils::AreAsyncAnimationsEnabled() ||
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!mPresContext->EffectCompositor()->
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HasThrottledStyleUpdates(),
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"throttled animations not up to date");
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// Compute what the css-transitions spec calls the "after-change
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// style", which is the new style without any data from transitions,
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// but still inheriting from data that contains transitions that are
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// not stopping or starting right now.
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RefPtr<nsStyleContext> afterChangeStyle;
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if (collection) {
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MOZ_ASSERT(mPresContext->StyleSet()->IsGecko(),
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"ServoStyleSets should not use nsTransitionManager "
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"for transitions");
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nsStyleSet* styleSet = mPresContext->StyleSet()->AsGecko();
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afterChangeStyle =
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styleSet->ResolveStyleWithoutAnimation(aElement, newStyleContext,
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eRestyle_CSSTransitions);
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} else {
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afterChangeStyle = newStyleContext;
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}
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nsAutoAnimationMutationBatch mb(aElement->OwnerDoc());
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// Per http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html
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// I'll consider only the transitions from the number of items in
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// 'transition-property' on down, and later ones will override earlier
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// ones (tracked using |whichStarted|).
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bool startedAny = false;
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nsCSSPropertySet whichStarted;
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for (uint32_t i = disp->mTransitionPropertyCount; i-- != 0; ) {
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const StyleTransition& t = disp->mTransitions[i];
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// Check the combined duration (combination of delay and duration)
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// first, since it defaults to zero, which means we can ignore the
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// transition.
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if (t.GetCombinedDuration() > 0.0f) {
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// We might have something to transition. See if any of the
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// properties in question changed and are animatable.
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// FIXME: Would be good to find a way to share code between this
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// interpretation of transition-property and the one below.
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nsCSSProperty property = t.GetProperty();
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if (property == eCSSPropertyExtra_no_properties ||
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property == eCSSPropertyExtra_variable ||
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property == eCSSProperty_UNKNOWN) {
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// Nothing to do, but need to exclude this from cases below.
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} else if (property == eCSSPropertyExtra_all_properties) {
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for (nsCSSProperty p = nsCSSProperty(0);
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p < eCSSProperty_COUNT_no_shorthands;
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p = nsCSSProperty(p + 1)) {
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ConsiderStartingTransition(p, t, aElement, collection,
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aOldStyleContext, afterChangeStyle,
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&startedAny, &whichStarted);
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}
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} else if (nsCSSProps::IsShorthand(property)) {
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CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(
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subprop, property, nsCSSProps::eEnabledForAllContent) {
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ConsiderStartingTransition(*subprop, t, aElement, collection,
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aOldStyleContext, afterChangeStyle,
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&startedAny, &whichStarted);
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}
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} else {
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ConsiderStartingTransition(property, t, aElement, collection,
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aOldStyleContext, afterChangeStyle,
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&startedAny, &whichStarted);
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}
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}
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}
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// Stop any transitions for properties that are no longer in
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// 'transition-property', including finished transitions.
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// Also stop any transitions (and remove any finished transitions)
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// for properties that just changed (and are still in the set of
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// properties to transition), but for which we didn't just start the
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// transition. This can happen delay and duration are both zero, or
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// because the new value is not interpolable.
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// Note that we also do the latter set of work in
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// nsTransitionManager::PruneCompletedTransitions.
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if (collection) {
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bool checkProperties =
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disp->mTransitions[0].GetProperty() != eCSSPropertyExtra_all_properties;
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nsCSSPropertySet allTransitionProperties;
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if (checkProperties) {
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for (uint32_t i = disp->mTransitionPropertyCount; i-- != 0; ) {
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const StyleTransition& t = disp->mTransitions[i];
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// FIXME: Would be good to find a way to share code between this
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// interpretation of transition-property and the one above.
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nsCSSProperty property = t.GetProperty();
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if (property == eCSSPropertyExtra_no_properties ||
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property == eCSSPropertyExtra_variable ||
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property == eCSSProperty_UNKNOWN) {
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// Nothing to do, but need to exclude this from cases below.
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} else if (property == eCSSPropertyExtra_all_properties) {
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for (nsCSSProperty p = nsCSSProperty(0);
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p < eCSSProperty_COUNT_no_shorthands;
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p = nsCSSProperty(p + 1)) {
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allTransitionProperties.AddProperty(p);
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}
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} else if (nsCSSProps::IsShorthand(property)) {
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CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(
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subprop, property, nsCSSProps::eEnabledForAllContent) {
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allTransitionProperties.AddProperty(*subprop);
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}
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} else {
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allTransitionProperties.AddProperty(property);
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}
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}
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}
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OwningCSSTransitionPtrArray& animations = collection->mAnimations;
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size_t i = animations.Length();
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MOZ_ASSERT(i != 0, "empty transitions list?");
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StyleAnimationValue currentValue;
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do {
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--i;
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CSSTransition* anim = animations[i];
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dom::KeyframeEffectReadOnly* effect = anim->GetEffect();
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MOZ_ASSERT(effect && effect->Properties().Length() == 1,
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"Should have one animation property for a transition");
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MOZ_ASSERT(effect && effect->Properties()[0].mSegments.Length() == 1,
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"Animation property should have one segment for a transition");
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const AnimationProperty& prop = effect->Properties()[0];
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const AnimationPropertySegment& segment = prop.mSegments[0];
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// properties no longer in 'transition-property'
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if ((checkProperties &&
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!allTransitionProperties.HasProperty(prop.mProperty)) ||
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// properties whose computed values changed but for which we
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// did not start a new transition (because delay and
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// duration are both zero, or because the new value is not
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// interpolable); a new transition would have segment.mToValue
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// matching currentValue
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!ExtractComputedValueForTransition(prop.mProperty, afterChangeStyle,
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currentValue) ||
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currentValue != segment.mToValue) {
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// stop the transition
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if (anim->HasCurrentEffect()) {
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EffectSet* effectSet = EffectSet::GetEffectSet(aElement, pseudoType);
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if (effectSet) {
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effectSet->UpdateAnimationGeneration(mPresContext);
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}
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}
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anim->CancelFromStyle();
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animations.RemoveElementAt(i);
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}
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} while (i != 0);
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if (animations.IsEmpty()) {
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collection->Destroy();
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collection = nullptr;
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}
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}
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MOZ_ASSERT(!startedAny || collection,
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"must have element transitions if we started any transitions");
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EffectCompositor::CascadeLevel cascadeLevel =
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EffectCompositor::CascadeLevel::Transitions;
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if (collection) {
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EffectCompositor::UpdateCascadeResults(aElement, pseudoType,
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|
newStyleContext);
|
|
|
|
collection->UpdateCheckGeneration(mPresContext);
|
|
mPresContext->EffectCompositor()->MaybeUpdateAnimationRule(aElement,
|
|
pseudoType,
|
|
cascadeLevel);
|
|
}
|
|
|
|
// We want to replace the new style context with the after-change style.
|
|
*aNewStyleContext = afterChangeStyle;
|
|
if (collection) {
|
|
// Since we have transition styles, we have to undo this replacement.
|
|
// The check of collection->mCheckGeneration against the restyle
|
|
// manager's GetAnimationGeneration() will ensure that we don't go
|
|
// through the rest of this function again when we do.
|
|
mPresContext->EffectCompositor()->PostRestyleForAnimation(aElement,
|
|
pseudoType,
|
|
cascadeLevel);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::ConsiderStartingTransition(
|
|
nsCSSProperty aProperty,
|
|
const StyleTransition& aTransition,
|
|
dom::Element* aElement,
|
|
CSSTransitionCollection*& aElementTransitions,
|
|
nsStyleContext* aOldStyleContext,
|
|
nsStyleContext* aNewStyleContext,
|
|
bool* aStartedAny,
|
|
nsCSSPropertySet* aWhichStarted)
|
|
{
|
|
// IsShorthand itself will assert if aProperty is not a property.
|
|
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
|
|
"property out of range");
|
|
NS_ASSERTION(!aElementTransitions ||
|
|
aElementTransitions->mElement == aElement, "Element mismatch");
|
|
|
|
if (aWhichStarted->HasProperty(aProperty)) {
|
|
// A later item in transition-property already started a
|
|
// transition for this property, so we ignore this one.
|
|
// See comment above and
|
|
// http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html .
|
|
return;
|
|
}
|
|
|
|
if (nsCSSProps::kAnimTypeTable[aProperty] == eStyleAnimType_None) {
|
|
return;
|
|
}
|
|
|
|
dom::DocumentTimeline* timeline = aElement->OwnerDoc()->Timeline();
|
|
|
|
StyleAnimationValue startValue, endValue, dummyValue;
|
|
bool haveValues =
|
|
ExtractComputedValueForTransition(aProperty, aOldStyleContext,
|
|
startValue) &&
|
|
ExtractComputedValueForTransition(aProperty, aNewStyleContext,
|
|
endValue);
|
|
|
|
bool haveChange = startValue != endValue;
|
|
|
|
bool shouldAnimate =
|
|
haveValues &&
|
|
haveChange &&
|
|
// Check that we can interpolate between these values
|
|
// (If this is ever a performance problem, we could add a
|
|
// CanInterpolate method, but it seems fine for now.)
|
|
StyleAnimationValue::Interpolate(aProperty, startValue, endValue,
|
|
0.5, dummyValue);
|
|
|
|
bool haveCurrentTransition = false;
|
|
size_t currentIndex = nsTArray<ElementPropertyTransition>::NoIndex;
|
|
const ElementPropertyTransition *oldPT = nullptr;
|
|
if (aElementTransitions) {
|
|
OwningCSSTransitionPtrArray& animations = aElementTransitions->mAnimations;
|
|
for (size_t i = 0, i_end = animations.Length(); i < i_end; ++i) {
|
|
const ElementPropertyTransition *iPt =
|
|
animations[i]->GetEffect()->AsTransition();
|
|
if (iPt->TransitionProperty() == aProperty) {
|
|
haveCurrentTransition = true;
|
|
currentIndex = i;
|
|
oldPT = iPt;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we got a style change that changed the value to the endpoint
|
|
// of the currently running transition, we don't want to interrupt
|
|
// its timing function.
|
|
// This needs to be before the !shouldAnimate && haveCurrentTransition
|
|
// case below because we might be close enough to the end of the
|
|
// transition that the current value rounds to the final value. In
|
|
// this case, we'll end up with shouldAnimate as false (because
|
|
// there's no value change), but we need to return early here rather
|
|
// than cancel the running transition because shouldAnimate is false!
|
|
//
|
|
// Likewise, if we got a style change that changed the value to the
|
|
// endpoint of our finished transition, we also don't want to start
|
|
// a new transition for the reasons described in
|
|
// https://lists.w3.org/Archives/Public/www-style/2015Jan/0444.html .
|
|
if (haveCurrentTransition && haveValues && oldPT->ToValue() == endValue) {
|
|
// GetAnimationRule already called RestyleForAnimation.
|
|
return;
|
|
}
|
|
|
|
if (!shouldAnimate) {
|
|
if (haveCurrentTransition) {
|
|
// We're in the middle of a transition, and just got a non-transition
|
|
// style change to something that we can't animate. This might happen
|
|
// because we got a non-transition style change changing to the current
|
|
// in-progress value (which is particularly easy to cause when we're
|
|
// currently in the 'transition-delay'). It also might happen because we
|
|
// just got a style change to a value that can't be interpolated.
|
|
OwningCSSTransitionPtrArray& animations =
|
|
aElementTransitions->mAnimations;
|
|
animations[currentIndex]->CancelFromStyle();
|
|
oldPT = nullptr; // Clear pointer so it doesn't dangle
|
|
animations.RemoveElementAt(currentIndex);
|
|
EffectSet* effectSet =
|
|
EffectSet::GetEffectSet(aElement, aNewStyleContext->GetPseudoType());
|
|
if (effectSet) {
|
|
effectSet->UpdateAnimationGeneration(mPresContext);
|
|
}
|
|
|
|
if (animations.IsEmpty()) {
|
|
aElementTransitions->Destroy();
|
|
// |aElementTransitions| is now a dangling pointer!
|
|
aElementTransitions = nullptr;
|
|
}
|
|
// GetAnimationRule already called RestyleForAnimation.
|
|
}
|
|
return;
|
|
}
|
|
|
|
const nsTimingFunction &tf = aTransition.GetTimingFunction();
|
|
float delay = aTransition.GetDelay();
|
|
float duration = aTransition.GetDuration();
|
|
if (duration < 0.0) {
|
|
// The spec says a negative duration is treated as zero.
|
|
duration = 0.0;
|
|
}
|
|
|
|
StyleAnimationValue startForReversingTest = startValue;
|
|
double reversePortion = 1.0;
|
|
|
|
// If the new transition reverses an existing one, we'll need to
|
|
// handle the timing differently.
|
|
if (haveCurrentTransition &&
|
|
aElementTransitions->mAnimations[currentIndex]->HasCurrentEffect() &&
|
|
oldPT->mStartForReversingTest == endValue) {
|
|
// Compute the appropriate negative transition-delay such that right
|
|
// now we'd end up at the current position.
|
|
double valuePortion =
|
|
oldPT->CurrentValuePortion() * oldPT->mReversePortion +
|
|
(1.0 - oldPT->mReversePortion);
|
|
// A timing function with negative y1 (or y2!) might make
|
|
// valuePortion negative. In this case, we still want to apply our
|
|
// reversing logic based on relative distances, not make duration
|
|
// negative.
|
|
if (valuePortion < 0.0) {
|
|
valuePortion = -valuePortion;
|
|
}
|
|
// A timing function with y2 (or y1!) greater than one might
|
|
// advance past its terminal value. It's probably a good idea to
|
|
// clamp valuePortion to be at most one to preserve the invariant
|
|
// that a transition will complete within at most its specified
|
|
// time.
|
|
if (valuePortion > 1.0) {
|
|
valuePortion = 1.0;
|
|
}
|
|
|
|
// Negative delays are essentially part of the transition
|
|
// function, so reduce them along with the duration, but don't
|
|
// reduce positive delays.
|
|
if (delay < 0.0f) {
|
|
delay *= valuePortion;
|
|
}
|
|
|
|
duration *= valuePortion;
|
|
|
|
startForReversingTest = oldPT->ToValue();
|
|
reversePortion = valuePortion;
|
|
}
|
|
|
|
TimingParams timing;
|
|
timing.mDuration.SetAsUnrestrictedDouble() = duration;
|
|
timing.mDelay = TimeDuration::FromMilliseconds(delay);
|
|
timing.mIterations = 1.0;
|
|
timing.mDirection = dom::PlaybackDirection::Normal;
|
|
timing.mFill = dom::FillMode::Backwards;
|
|
|
|
RefPtr<ElementPropertyTransition> pt =
|
|
new ElementPropertyTransition(aElement->OwnerDoc(), aElement,
|
|
aNewStyleContext->GetPseudoType(), timing,
|
|
startForReversingTest, reversePortion);
|
|
|
|
AnimationProperty& prop = *pt->Properties().AppendElement();
|
|
prop.mProperty = aProperty;
|
|
|
|
AnimationPropertySegment& segment = *prop.mSegments.AppendElement();
|
|
segment.mFromValue = startValue;
|
|
segment.mToValue = endValue;
|
|
segment.mFromKey = 0;
|
|
segment.mToKey = 1;
|
|
if (tf.mType != nsTimingFunction::Type::Linear) {
|
|
ComputedTimingFunction computedTimingFunction;
|
|
computedTimingFunction.Init(tf);
|
|
segment.mTimingFunction = Some(computedTimingFunction);
|
|
}
|
|
|
|
MOZ_ASSERT(mPresContext->RestyleManager()->IsGecko(),
|
|
"ServoRestyleManager should not use nsTransitionManager "
|
|
"for transitions");
|
|
|
|
RefPtr<CSSTransition> animation =
|
|
new CSSTransition(mPresContext->Document()->GetScopeObject());
|
|
animation->SetOwningElement(
|
|
OwningElementRef(*aElement, aNewStyleContext->GetPseudoType()));
|
|
animation->SetTimeline(timeline);
|
|
animation->SetCreationSequence(
|
|
mPresContext->RestyleManager()->AsGecko()->GetAnimationGeneration());
|
|
// The order of the following two calls is important since PlayFromStyle
|
|
// will add the animation to the PendingAnimationTracker of its effect's
|
|
// document. When we come to make effect writeable (bug 1049975) we should
|
|
// remove this dependency.
|
|
animation->SetEffect(pt);
|
|
animation->PlayFromStyle();
|
|
|
|
if (!aElementTransitions) {
|
|
aElementTransitions =
|
|
GetAnimationCollection(aElement,
|
|
aNewStyleContext->GetPseudoType(),
|
|
true /* aCreateIfNeeded */);
|
|
if (!aElementTransitions) {
|
|
NS_WARNING("allocating CommonAnimationManager failed");
|
|
return;
|
|
}
|
|
}
|
|
|
|
OwningCSSTransitionPtrArray& animations = aElementTransitions->mAnimations;
|
|
#ifdef DEBUG
|
|
for (size_t i = 0, i_end = animations.Length(); i < i_end; ++i) {
|
|
MOZ_ASSERT(
|
|
i == currentIndex ||
|
|
(animations[i]->GetEffect() &&
|
|
animations[i]->GetEffect()->AsTransition()->TransitionProperty()
|
|
!= aProperty),
|
|
"duplicate transitions for property");
|
|
}
|
|
#endif
|
|
if (haveCurrentTransition) {
|
|
animations[currentIndex]->CancelFromStyle();
|
|
oldPT = nullptr; // Clear pointer so it doesn't dangle
|
|
animations[currentIndex] = animation;
|
|
} else {
|
|
if (!animations.AppendElement(animation)) {
|
|
NS_WARNING("out of memory");
|
|
return;
|
|
}
|
|
}
|
|
|
|
EffectSet* effectSet =
|
|
EffectSet::GetEffectSet(aElement, aNewStyleContext->GetPseudoType());
|
|
if (effectSet) {
|
|
effectSet->UpdateAnimationGeneration(mPresContext);
|
|
}
|
|
|
|
*aStartedAny = true;
|
|
aWhichStarted->AddProperty(aProperty);
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::PruneCompletedTransitions(mozilla::dom::Element* aElement,
|
|
CSSPseudoElementType aPseudoType,
|
|
nsStyleContext* aNewStyleContext)
|
|
{
|
|
CSSTransitionCollection* collection =
|
|
GetAnimationCollection(aElement, aPseudoType, false /* aCreateIfNeeded */);
|
|
if (!collection) {
|
|
return;
|
|
}
|
|
|
|
// Remove any finished transitions whose style doesn't match the new
|
|
// style.
|
|
// This is similar to some of the work that happens near the end of
|
|
// nsTransitionManager::StyleContextChanged.
|
|
// FIXME (bug 1158431): Really, we should also cancel running
|
|
// transitions whose destination doesn't match as well.
|
|
OwningCSSTransitionPtrArray& animations = collection->mAnimations;
|
|
size_t i = animations.Length();
|
|
MOZ_ASSERT(i != 0, "empty transitions list?");
|
|
do {
|
|
--i;
|
|
CSSTransition* anim = animations[i];
|
|
|
|
if (anim->HasCurrentEffect()) {
|
|
continue;
|
|
}
|
|
|
|
dom::KeyframeEffectReadOnly* effect = anim->GetEffect();
|
|
MOZ_ASSERT(effect->Properties().Length() == 1,
|
|
"Should have one animation property for a transition");
|
|
MOZ_ASSERT(effect->Properties()[0].mSegments.Length() == 1,
|
|
"Animation property should have one segment for a transition");
|
|
const AnimationProperty& prop = effect->Properties()[0];
|
|
const AnimationPropertySegment& segment = prop.mSegments[0];
|
|
|
|
// Since effect is a finished transition, we know it didn't
|
|
// influence style.
|
|
StyleAnimationValue currentValue;
|
|
if (!ExtractComputedValueForTransition(prop.mProperty, aNewStyleContext,
|
|
currentValue) ||
|
|
currentValue != segment.mToValue) {
|
|
anim->CancelFromStyle();
|
|
animations.RemoveElementAt(i);
|
|
}
|
|
} while (i != 0);
|
|
|
|
if (collection->mAnimations.IsEmpty()) {
|
|
collection->Destroy();
|
|
// |collection| is now a dangling pointer!
|
|
collection = nullptr;
|
|
}
|
|
}
|