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c5f689a020
As a result, transitions are now stored using a pointer to the base class, mozilla::ElementAnimation. We downcast to a transition only when necessary. No error-checking of the result of AsTransition is performed since we only ever call it on the mAnimations member of ElementTransitions.
264 lines
10 KiB
C++
264 lines
10 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsAnimationManager_h_
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#define nsAnimationManager_h_
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#include "mozilla/Attributes.h"
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#include "mozilla/ContentEvents.h"
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#include "AnimationCommon.h"
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#include "nsCSSPseudoElements.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/TimeStamp.h"
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class nsCSSKeyframesRule;
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class nsStyleContext;
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namespace mozilla {
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namespace css {
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class Declaration;
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}
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}
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struct AnimationEventInfo {
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nsRefPtr<mozilla::dom::Element> mElement;
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mozilla::InternalAnimationEvent mEvent;
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AnimationEventInfo(mozilla::dom::Element *aElement,
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const nsString& aAnimationName,
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uint32_t aMessage, mozilla::TimeDuration aElapsedTime,
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const nsAString& aPseudoElement)
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: mElement(aElement), mEvent(true, aMessage)
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{
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// XXX Looks like nobody initialize WidgetEvent::time
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mEvent.animationName = aAnimationName;
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mEvent.elapsedTime = aElapsedTime.ToSeconds();
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mEvent.pseudoElement = aPseudoElement;
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}
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// InternalAnimationEvent doesn't support copy-construction, so we need
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// to ourselves in order to work with nsTArray
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AnimationEventInfo(const AnimationEventInfo &aOther)
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: mElement(aOther.mElement), mEvent(true, aOther.mEvent.message)
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{
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mEvent.AssignAnimationEventData(aOther.mEvent, false);
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}
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};
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typedef InfallibleTArray<AnimationEventInfo> EventArray;
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/**
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* Data about all of the animations running on an element.
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*/
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struct ElementAnimations MOZ_FINAL
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: public mozilla::css::CommonElementAnimationData
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{
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typedef mozilla::TimeStamp TimeStamp;
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typedef mozilla::TimeDuration TimeDuration;
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ElementAnimations(mozilla::dom::Element *aElement, nsIAtom *aElementProperty,
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nsAnimationManager *aAnimationManager, TimeStamp aNow);
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// This function takes as input the start time, duration, and direction of an
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// animation and returns the position in the current iteration. Note that
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// this only works when we know that the animation is currently running.
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// This way of calling the function can be used from the compositor. Note
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// that if the animation has not started yet, has already ended, or is paused,
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// it should not be run from the compositor. When this function is called
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// from the main thread, we need the actual ElementAnimation* in order to
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// get correct animation-fill behavior and to fire animation events.
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// This function returns -1 for the position if the animation should not be
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// run (because it is not currently active and has no fill behavior), but
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// only does so if aAnimation is non-null; with a null aAnimation it is an
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// error to give aElapsedDuration < 0, and fill-forwards is assumed.
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// After calling GetPositionInIteration with non-null aAnimation and aEa, be
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// sure to call CheckNeedsRefresh on the animation manager afterwards.
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static double GetPositionInIteration(TimeDuration aElapsedDuration,
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TimeDuration aIterationDuration,
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double aIterationCount,
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uint32_t aDirection,
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mozilla::ElementAnimation* aAnimation =
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nullptr,
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ElementAnimations* aEa = nullptr,
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EventArray* aEventsToDispatch = nullptr);
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void EnsureStyleRuleFor(TimeStamp aRefreshTime,
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EventArray &aEventsToDispatch,
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bool aIsThrottled);
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bool IsForElement() const { // rather than for a pseudo-element
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return mElementProperty == nsGkAtoms::animationsProperty;
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}
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nsString PseudoElement()
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{
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return mElementProperty == nsGkAtoms::animationsProperty ?
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EmptyString() :
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mElementProperty == nsGkAtoms::animationsOfBeforeProperty ?
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NS_LITERAL_STRING("::before") :
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NS_LITERAL_STRING("::after");
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}
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void PostRestyleForAnimation(nsPresContext *aPresContext) {
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nsRestyleHint styleHint = IsForElement() ? eRestyle_Self : eRestyle_Subtree;
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aPresContext->PresShell()->RestyleForAnimation(mElement, styleHint);
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}
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// If aFlags contains CanAnimate_AllowPartial, returns whether the
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// state of this element's animations at the current refresh driver
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// time contains animation data that can be done on the compositor
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// thread. (This is useful for determining whether a layer should be
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// active, or whether to send data to the layer.)
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// If aFlags does not contain CanAnimate_AllowPartial, returns whether
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// the state of this element's animations at the current refresh driver
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// time can be fully represented by data sent to the compositor.
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// (This is useful for determining whether throttle the animation
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// (suppress main-thread style updates).)
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// Note that when CanPerformOnCompositorThread returns true, it also,
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// as a side-effect, notifies the ActiveLayerTracker. FIXME: This
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// should probably move to the relevant callers.
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virtual bool CanPerformOnCompositorThread(CanAnimateFlags aFlags) const MOZ_OVERRIDE;
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virtual bool HasAnimationOfProperty(nsCSSProperty aProperty) const MOZ_OVERRIDE;
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// False when we know that our current style rule is valid
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// indefinitely into the future (because all of our animations are
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// either completed or paused). May be invalidated by a style change.
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bool mNeedsRefreshes;
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};
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class nsAnimationManager MOZ_FINAL
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: public mozilla::css::CommonAnimationManager
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{
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public:
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nsAnimationManager(nsPresContext *aPresContext)
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: mozilla::css::CommonAnimationManager(aPresContext)
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, mObservingRefreshDriver(false)
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{
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}
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static ElementAnimations* GetAnimationsForCompositor(nsIContent* aContent,
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nsCSSProperty aProperty)
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{
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if (!aContent->MayHaveAnimations())
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return nullptr;
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ElementAnimations* animations = static_cast<ElementAnimations*>(
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aContent->GetProperty(nsGkAtoms::animationsProperty));
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if (!animations)
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return nullptr;
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bool propertyMatches = animations->HasAnimationOfProperty(aProperty);
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return (propertyMatches &&
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animations->CanPerformOnCompositorThread(
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mozilla::css::CommonElementAnimationData::CanAnimate_AllowPartial))
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? animations
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: nullptr;
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}
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// Returns true if aContent or any of its ancestors has an animation.
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static bool ContentOrAncestorHasAnimation(nsIContent* aContent) {
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do {
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if (aContent->GetProperty(nsGkAtoms::animationsProperty)) {
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return true;
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}
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} while ((aContent = aContent->GetParent()));
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return false;
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}
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void EnsureStyleRuleFor(ElementAnimations* aET);
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// nsIStyleRuleProcessor (parts)
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virtual void RulesMatching(ElementRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual void RulesMatching(PseudoElementRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual void RulesMatching(AnonBoxRuleProcessorData* aData) MOZ_OVERRIDE;
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#ifdef MOZ_XUL
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virtual void RulesMatching(XULTreeRuleProcessorData* aData) MOZ_OVERRIDE;
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#endif
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virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
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const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
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virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
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const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
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// nsARefreshObserver
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virtual void WillRefresh(mozilla::TimeStamp aTime) MOZ_OVERRIDE;
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void FlushAnimations(FlushFlags aFlags);
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/**
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* Return the style rule that RulesMatching should add for
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* aStyleContext. This might be different from what RulesMatching
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* actually added during aStyleContext's construction because the
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* element's animation-name may have changed. (However, this does
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* return null during the non-animation restyling phase, as
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* RulesMatching does.)
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*
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* aStyleContext may be a style context for aElement or for its
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* :before or :after pseudo-element.
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*/
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nsIStyleRule* CheckAnimationRule(nsStyleContext* aStyleContext,
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mozilla::dom::Element* aElement);
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/**
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* Dispatch any pending events. We accumulate animationend and
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* animationiteration events only during refresh driver notifications
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* (and dispatch them at the end of such notifications), but we
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* accumulate animationstart events at other points when style
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* contexts are created.
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*/
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void DispatchEvents() {
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// Fast-path the common case: no events
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if (!mPendingEvents.IsEmpty()) {
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DoDispatchEvents();
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}
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}
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ElementAnimations* GetElementAnimations(mozilla::dom::Element *aElement,
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nsCSSPseudoElements::Type aPseudoType,
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bool aCreateIfNeeded);
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// Updates styles on throttled animations. See note on nsTransitionManager
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void UpdateAllThrottledStyles();
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protected:
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virtual void ElementDataRemoved() MOZ_OVERRIDE
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{
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CheckNeedsRefresh();
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}
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virtual void AddElementData(mozilla::css::CommonElementAnimationData* aData) MOZ_OVERRIDE;
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/**
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* Check to see if we should stop or start observing the refresh driver
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*/
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void CheckNeedsRefresh();
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private:
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void BuildAnimations(nsStyleContext* aStyleContext,
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mozilla::ElementAnimationPtrArray& aAnimations);
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bool BuildSegment(InfallibleTArray<mozilla::AnimationPropertySegment>&
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aSegments,
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nsCSSProperty aProperty, const nsAnimation& aAnimation,
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float aFromKey, nsStyleContext* aFromContext,
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mozilla::css::Declaration* aFromDeclaration,
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float aToKey, nsStyleContext* aToContext);
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nsIStyleRule* GetAnimationRule(mozilla::dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType);
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// Update the animated styles of an element and its descendants.
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// If the element has an animation, it is flushed back to its primary frame.
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// If the element does not have an animation, then its style is reparented.
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void UpdateThrottledStylesForSubtree(nsIContent* aContent,
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nsStyleContext* aParentStyle,
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nsStyleChangeList &aChangeList);
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void UpdateAllThrottledStylesInternal();
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// The guts of DispatchEvents
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void DoDispatchEvents();
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EventArray mPendingEvents;
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bool mObservingRefreshDriver;
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};
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#endif /* !defined(nsAnimationManager_h_) */
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