mirror of
https://github.com/mozilla/gecko-dev.git
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770 lines
30 KiB
C++
770 lines
30 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 "nsIContent.h"
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#include "nsStyleContext.h"
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#include "nsCSSProps.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/EventDispatcher.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/StyleAnimationValue.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 "nsDisplayList.h"
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#include "nsStyleChangeList.h"
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#include "nsStyleSet.h"
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#include "RestyleManager.h"
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using mozilla::TimeStamp;
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using mozilla::TimeDuration;
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using mozilla::dom::AnimationPlayer;
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using mozilla::dom::Animation;
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using namespace mozilla;
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using namespace mozilla::layers;
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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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// It would be easy enough to handle finished transitions by using a time
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// fraction of 1 but currently we should not be called for finished
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// transitions.
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MOZ_ASSERT(!IsFinishedTransition(),
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"Getting the value portion of a finished transition");
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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 fraction 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 time fraction
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// is never null.
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AnimationTiming timingToUse = mTiming;
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timingToUse.mFillMode = NS_STYLE_ANIMATION_FILL_MODE_BOTH;
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ComputedTiming computedTiming = GetComputedTiming(&timingToUse);
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MOZ_ASSERT(computedTiming.mTimeFraction != ComputedTiming::kNullTimeFraction,
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"Got a null time fraction 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 mProperties[0].mSegments[0].mTimingFunction
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.GetValue(computedTiming.mTimeFraction);
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}
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/*****************************************************************************
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* CSSTransitionPlayer *
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*****************************************************************************/
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mozilla::dom::AnimationPlayState
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CSSTransitionPlayer::PlayStateFromJS() const
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{
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FlushStyle();
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return AnimationPlayer::PlayStateFromJS();
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}
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void
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CSSTransitionPlayer::PlayFromJS()
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{
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FlushStyle();
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AnimationPlayer::PlayFromJS();
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}
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CommonAnimationManager*
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CSSTransitionPlayer::GetAnimationManager() const
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{
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nsPresContext* context = GetPresContext();
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if (!context) {
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return nullptr;
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}
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return context->TransitionManager();
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}
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/*****************************************************************************
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* nsTransitionManager *
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*****************************************************************************/
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void
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nsTransitionManager::StyleContextChanged(dom::Element *aElement,
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nsStyleContext *aOldStyleContext,
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nsRefPtr<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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nsCSSPseudoElements::Type pseudoType = newStyleContext->GetPseudoType();
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if (pseudoType != nsCSSPseudoElements::ePseudo_NotPseudoElement) {
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if (pseudoType != nsCSSPseudoElements::ePseudo_before &&
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pseudoType != nsCSSPseudoElements::ePseudo_after) {
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return;
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}
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NS_ASSERTION((pseudoType == nsCSSPseudoElements::ePseudo_before &&
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aElement->Tag() == nsGkAtoms::mozgeneratedcontentbefore) ||
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(pseudoType == nsCSSPseudoElements::ePseudo_after &&
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aElement->Tag() == 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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AnimationPlayerCollection* collection =
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GetAnimationPlayers(aElement, pseudoType, false);
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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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if (collection &&
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collection->mCheckGeneration ==
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mPresContext->RestyleManager()->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->RestyleManager()->
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ThrottledAnimationStyleIsUpToDate(),
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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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nsRefPtr<nsStyleContext> afterChangeStyle;
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if (collection) {
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nsStyleSet* styleSet = mPresContext->StyleSet();
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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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// 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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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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AnimationPlayerPtrArray& players = collection->mPlayers;
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size_t i = players.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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AnimationPlayer* player = players[i];
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dom::Animation* anim = player->GetSource();
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MOZ_ASSERT(anim && anim->Properties().Length() == 1,
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"Should have one animation property for a transition");
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MOZ_ASSERT(anim && anim->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 = anim->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 (!player->GetSource()->IsFinishedTransition()) {
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player->Cancel();
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collection->UpdateAnimationGeneration(mPresContext);
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}
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players.RemoveElementAt(i);
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}
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} while (i != 0);
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if (players.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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if (collection) {
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// Set the style rule refresh time to null so that EnsureStyleRuleFor
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// creates a new style rule if we started *or* stopped transitions.
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collection->mStyleRuleRefreshTime = TimeStamp();
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collection->UpdateCheckGeneration(mPresContext);
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collection->mNeedsRefreshes = true;
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TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
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collection->EnsureStyleRuleFor(now, EnsureStyleRule_IsNotThrottled);
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}
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// We want to replace the new style context with the after-change style.
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*aNewStyleContext = afterChangeStyle;
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if (collection) {
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// Since we have transition styles, we have to undo this replacement.
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// The check of collection->mCheckGeneration against the restyle
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// manager's GetAnimationGeneration() will ensure that we don't go
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// through the rest of this function again when we do.
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collection->PostRestyleForAnimation(mPresContext);
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}
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}
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void
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nsTransitionManager::ConsiderStartingTransition(
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nsCSSProperty aProperty,
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const StyleTransition& aTransition,
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dom::Element* aElement,
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AnimationPlayerCollection*& aElementTransitions,
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nsStyleContext* aOldStyleContext,
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nsStyleContext* aNewStyleContext,
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bool* aStartedAny,
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nsCSSPropertySet* aWhichStarted)
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{
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// IsShorthand itself will assert if aProperty is not a property.
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MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
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"property out of range");
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NS_ASSERTION(!aElementTransitions ||
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aElementTransitions->mElement == aElement, "Element mismatch");
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if (aWhichStarted->HasProperty(aProperty)) {
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// A later item in transition-property already started a
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// transition for this property, so we ignore this one.
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// See comment above and
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// http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html .
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return;
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}
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if (nsCSSProps::kAnimTypeTable[aProperty] == eStyleAnimType_None) {
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return;
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}
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dom::AnimationTimeline* timeline = aElement->OwnerDoc()->Timeline();
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StyleAnimationValue startValue, endValue, dummyValue;
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bool haveValues =
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ExtractComputedValueForTransition(aProperty, aOldStyleContext,
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startValue) &&
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ExtractComputedValueForTransition(aProperty, aNewStyleContext,
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endValue);
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bool haveChange = startValue != endValue;
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bool shouldAnimate =
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haveValues &&
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haveChange &&
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// Check that we can interpolate between these values
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// (If this is ever a performance problem, we could add a
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// CanInterpolate method, but it seems fine for now.)
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StyleAnimationValue::Interpolate(aProperty, startValue, endValue,
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0.5, dummyValue);
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bool haveCurrentTransition = false;
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size_t currentIndex = nsTArray<ElementPropertyTransition>::NoIndex;
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const ElementPropertyTransition *oldPT = nullptr;
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if (aElementTransitions) {
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AnimationPlayerPtrArray& players = aElementTransitions->mPlayers;
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for (size_t i = 0, i_end = players.Length(); i < i_end; ++i) {
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MOZ_ASSERT(players[i]->GetSource() &&
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players[i]->GetSource()->Properties().Length() == 1,
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"Should have one animation property for a transition");
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if (players[i]->GetSource()->Properties()[0].mProperty == aProperty) {
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haveCurrentTransition = true;
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currentIndex = i;
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oldPT = players[currentIndex]->GetSource()->AsTransition();
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break;
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}
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}
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}
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// If we got a style change that changed the value to the endpoint
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// of the currently running transition, we don't want to interrupt
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// its timing function.
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// This needs to be before the !shouldAnimate && haveCurrentTransition
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// case below because we might be close enough to the end of the
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// transition that the current value rounds to the final value. In
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// this case, we'll end up with shouldAnimate as false (because
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// there's no value change), but we need to return early here rather
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// than cancel the running transition because shouldAnimate is false!
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//
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// Likewise, if we got a style change that changed the value to the
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// endpoint of our finished transition, we also don't want to start
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// a new transition for the reasons described in
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// https://lists.w3.org/Archives/Public/www-style/2015Jan/0444.html .
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MOZ_ASSERT(!oldPT || oldPT->Properties()[0].mSegments.Length() == 1,
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"Should have one animation property segment for a transition");
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if (haveCurrentTransition && haveValues &&
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oldPT->Properties()[0].mSegments[0].mToValue == endValue) {
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// GetAnimationRule already called RestyleForAnimation.
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return;
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}
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if (!shouldAnimate) {
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if (haveCurrentTransition && !oldPT->IsFinishedTransition()) {
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// We're in the middle of a transition, and just got a non-transition
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// style change to something that we can't animate. This might happen
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// because we got a non-transition style change changing to the current
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// in-progress value (which is particularly easy to cause when we're
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// currently in the 'transition-delay'). It also might happen because we
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// just got a style change to a value that can't be interpolated.
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AnimationPlayerPtrArray& players = aElementTransitions->mPlayers;
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players[currentIndex]->Cancel();
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oldPT = nullptr; // Clear pointer so it doesn't dangle
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players.RemoveElementAt(currentIndex);
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aElementTransitions->UpdateAnimationGeneration(mPresContext);
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if (players.IsEmpty()) {
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aElementTransitions->Destroy();
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// |aElementTransitions| is now a dangling pointer!
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aElementTransitions = nullptr;
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}
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// GetAnimationRule already called RestyleForAnimation.
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}
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return;
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}
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|
|
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 &&
|
|
!oldPT->IsFinishedTransition() &&
|
|
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->Properties()[0].mSegments[0].mToValue;
|
|
reversePortion = valuePortion;
|
|
}
|
|
|
|
AnimationTiming timing;
|
|
timing.mIterationDuration = TimeDuration::FromMilliseconds(duration);
|
|
timing.mDelay = TimeDuration::FromMilliseconds(delay);
|
|
timing.mIterationCount = 1;
|
|
timing.mDirection = NS_STYLE_ANIMATION_DIRECTION_NORMAL;
|
|
timing.mFillMode = NS_STYLE_ANIMATION_FILL_MODE_BACKWARDS;
|
|
|
|
nsRefPtr<ElementPropertyTransition> pt =
|
|
new ElementPropertyTransition(aElement->OwnerDoc(), aElement,
|
|
aNewStyleContext->GetPseudoType(), timing);
|
|
pt->mStartForReversingTest = startForReversingTest;
|
|
pt->mReversePortion = 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;
|
|
segment.mTimingFunction.Init(tf);
|
|
|
|
nsRefPtr<CSSTransitionPlayer> player = new CSSTransitionPlayer(timeline);
|
|
// The order of the following two calls is important since PlayFromStyle
|
|
// will add the player to the PendingPlayerTracker of its source content's
|
|
// document. When we come to make source writeable (bug 1049975) we should
|
|
// remove this dependency.
|
|
player->SetSource(pt);
|
|
player->PlayFromStyle();
|
|
|
|
if (!aElementTransitions) {
|
|
aElementTransitions =
|
|
GetAnimationPlayers(aElement, aNewStyleContext->GetPseudoType(), true);
|
|
if (!aElementTransitions) {
|
|
NS_WARNING("allocating CommonAnimationManager failed");
|
|
return;
|
|
}
|
|
}
|
|
|
|
AnimationPlayerPtrArray& players = aElementTransitions->mPlayers;
|
|
#ifdef DEBUG
|
|
for (size_t i = 0, i_end = players.Length(); i < i_end; ++i) {
|
|
MOZ_ASSERT(players[i]->GetSource() &&
|
|
players[i]->GetSource()->Properties().Length() == 1,
|
|
"Should have one animation property for a transition");
|
|
MOZ_ASSERT(
|
|
i == currentIndex ||
|
|
(players[i]->GetSource() &&
|
|
players[i]->GetSource()->Properties()[0].mProperty != aProperty),
|
|
"duplicate transitions for property");
|
|
}
|
|
#endif
|
|
if (haveCurrentTransition) {
|
|
players[currentIndex]->Cancel();
|
|
oldPT = nullptr; // Clear pointer so it doesn't dangle
|
|
players[currentIndex] = player;
|
|
} else {
|
|
if (!players.AppendElement(player)) {
|
|
NS_WARNING("out of memory");
|
|
return;
|
|
}
|
|
}
|
|
aElementTransitions->UpdateAnimationGeneration(mPresContext);
|
|
|
|
*aStartedAny = true;
|
|
aWhichStarted->AddProperty(aProperty);
|
|
}
|
|
|
|
/*
|
|
* nsIStyleRuleProcessor implementation
|
|
*/
|
|
|
|
/* virtual */ size_t
|
|
nsTransitionManager::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
return CommonAnimationManager::SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
/* virtual */ size_t
|
|
nsTransitionManager::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
struct TransitionEventInfo {
|
|
nsCOMPtr<nsIContent> mElement;
|
|
InternalTransitionEvent mEvent;
|
|
|
|
TransitionEventInfo(nsIContent *aElement, nsCSSProperty aProperty,
|
|
TimeDuration aDuration, const nsAString& aPseudoElement)
|
|
: mElement(aElement)
|
|
, mEvent(true, NS_TRANSITION_END)
|
|
{
|
|
// XXX Looks like nobody initialize WidgetEvent::time
|
|
mEvent.propertyName =
|
|
NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(aProperty));
|
|
mEvent.elapsedTime = aDuration.ToSeconds();
|
|
mEvent.pseudoElement = aPseudoElement;
|
|
}
|
|
|
|
// InternalTransitionEvent doesn't support copy-construction, so we need
|
|
// to ourselves in order to work with nsTArray
|
|
TransitionEventInfo(const TransitionEventInfo &aOther)
|
|
: mElement(aOther.mElement)
|
|
, mEvent(true, NS_TRANSITION_END)
|
|
{
|
|
mEvent.AssignTransitionEventData(aOther.mEvent, false);
|
|
}
|
|
};
|
|
|
|
/* virtual */ void
|
|
nsTransitionManager::WillRefresh(mozilla::TimeStamp aTime)
|
|
{
|
|
MOZ_ASSERT(mPresContext,
|
|
"refresh driver should not notify additional observers "
|
|
"after pres context has been destroyed");
|
|
if (!mPresContext->GetPresShell()) {
|
|
// Someone might be keeping mPresContext alive past the point
|
|
// where it has been torn down; don't bother doing anything in
|
|
// this case. But do get rid of all our transitions so we stop
|
|
// triggering refreshes.
|
|
RemoveAllElementCollections();
|
|
return;
|
|
}
|
|
|
|
FlushTransitions(Can_Throttle);
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::FlushTransitions(FlushFlags aFlags)
|
|
{
|
|
if (PR_CLIST_IS_EMPTY(&mElementCollections)) {
|
|
// no transitions, leave early
|
|
return;
|
|
}
|
|
|
|
nsTArray<TransitionEventInfo> events;
|
|
TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
|
|
bool didThrottle = false;
|
|
// Trim transitions that have completed, post restyle events for frames that
|
|
// are still transitioning, and start transitions with delays.
|
|
{
|
|
PRCList *next = PR_LIST_HEAD(&mElementCollections);
|
|
while (next != &mElementCollections) {
|
|
AnimationPlayerCollection* collection =
|
|
static_cast<AnimationPlayerCollection*>(next);
|
|
next = PR_NEXT_LINK(next);
|
|
|
|
collection->Tick();
|
|
bool canThrottleTick = aFlags == Can_Throttle &&
|
|
collection->CanPerformOnCompositorThread(
|
|
AnimationPlayerCollection::CanAnimateFlags(0)) &&
|
|
collection->CanThrottleAnimation(now);
|
|
|
|
MOZ_ASSERT(collection->mElement->GetCrossShadowCurrentDoc() ==
|
|
mPresContext->Document(),
|
|
"Element::UnbindFromTree should have "
|
|
"destroyed the element transitions object");
|
|
|
|
size_t i = collection->mPlayers.Length();
|
|
MOZ_ASSERT(i != 0, "empty transitions list?");
|
|
bool transitionStartedOrEnded = false;
|
|
do {
|
|
--i;
|
|
AnimationPlayer* player = collection->mPlayers[i];
|
|
if (!player->GetSource()->IsFinishedTransition()) {
|
|
MOZ_ASSERT(player->GetSource(),
|
|
"Transitions should have source content");
|
|
ComputedTiming computedTiming =
|
|
player->GetSource()->GetComputedTiming();
|
|
if (computedTiming.mPhase == ComputedTiming::AnimationPhase_After) {
|
|
MOZ_ASSERT(player->GetSource()->Properties().Length() == 1,
|
|
"Should have one animation property for a transition");
|
|
nsCSSProperty prop = player->GetSource()->Properties()[0].mProperty;
|
|
TimeDuration duration =
|
|
player->GetSource()->Timing().mIterationDuration;
|
|
events.AppendElement(
|
|
TransitionEventInfo(collection->mElement, prop,
|
|
duration,
|
|
collection->PseudoElement()));
|
|
|
|
// Leave this transition in the list for one more refresh
|
|
// cycle, since we haven't yet processed its style change, and
|
|
// if we also have (already, or will have from processing
|
|
// transitionend events or other refresh driver notifications)
|
|
// a non-animation style change that would affect it, we need
|
|
// to know not to start a new transition for the transition
|
|
// from the almost-completed value to the final value.
|
|
player->GetSource()->SetIsFinishedTransition();
|
|
collection->UpdateAnimationGeneration(mPresContext);
|
|
transitionStartedOrEnded = true;
|
|
} else if ((computedTiming.mPhase ==
|
|
ComputedTiming::AnimationPhase_Active) &&
|
|
canThrottleTick &&
|
|
!player->IsRunningOnCompositor()) {
|
|
// Start a transition with a delay where we should start the
|
|
// transition proper.
|
|
collection->UpdateAnimationGeneration(mPresContext);
|
|
transitionStartedOrEnded = true;
|
|
}
|
|
}
|
|
} while (i != 0);
|
|
|
|
// We need to restyle even if the transition rule no longer
|
|
// applies (in which case we just made it not apply).
|
|
MOZ_ASSERT(collection->mElementProperty ==
|
|
nsGkAtoms::transitionsProperty ||
|
|
collection->mElementProperty ==
|
|
nsGkAtoms::transitionsOfBeforeProperty ||
|
|
collection->mElementProperty ==
|
|
nsGkAtoms::transitionsOfAfterProperty,
|
|
"Unexpected element property; might restyle too much");
|
|
if (!canThrottleTick || transitionStartedOrEnded) {
|
|
collection->PostRestyleForAnimation(mPresContext);
|
|
} else {
|
|
didThrottle = true;
|
|
}
|
|
|
|
if (collection->mPlayers.IsEmpty()) {
|
|
collection->Destroy();
|
|
// |collection| is now a dangling pointer!
|
|
collection = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (didThrottle) {
|
|
mPresContext->Document()->SetNeedStyleFlush();
|
|
}
|
|
|
|
for (uint32_t i = 0, i_end = events.Length(); i < i_end; ++i) {
|
|
TransitionEventInfo &info = events[i];
|
|
EventDispatcher::Dispatch(info.mElement, mPresContext, &info.mEvent);
|
|
|
|
if (!mPresContext) {
|
|
break;
|
|
}
|
|
}
|
|
}
|