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813855dd9b
This patch changes the inheritance of ElementPropertyTransition so that it is a subclass of Animation not AnimationPlayer. The only thing special about ElementPropertyTransition is it stores some extra state for reversing transitions and an extra ValuePortionFor convenience method. This reversing behavior is implemented by the transition manager by creating a new AnimationPlayer (i.e. it is *not* a property of the AnimationPlayer). As a result this extra state can be pushed down to Animation which simplifies the code significantly. In future if we implement KeyframeEffect as a separate object we may be able to push transition-specific state down to KeyframeEffect instead.
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_AnimationPlayer_h
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#define mozilla_dom_AnimationPlayer_h
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#include <algorithm> // for std::max
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#include "nsWrapperCache.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/TimeStamp.h" // for TimeStamp, TimeDuration
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#include "mozilla/dom/Animation.h" // for Animation
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#include "mozilla/dom/AnimationTimeline.h" // for AnimationTimeline
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#include "nsCSSProperty.h" // for nsCSSProperty
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// X11 has a #define for CurrentTime.
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#ifdef CurrentTime
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#undef CurrentTime
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#endif
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struct JSContext;
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namespace mozilla {
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namespace dom {
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class AnimationPlayer MOZ_FINAL : public nsWrapperCache
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{
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protected:
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virtual ~AnimationPlayer() { }
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public:
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explicit AnimationPlayer(AnimationTimeline* aTimeline)
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: mIsRunningOnCompositor(false)
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, mTimeline(aTimeline)
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{
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SetIsDOMBinding();
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}
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NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(AnimationPlayer)
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AnimationPlayer)
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AnimationTimeline* GetParentObject() const { return mTimeline; }
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virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
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// AnimationPlayer methods
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Animation* GetSource() const { return mSource; }
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AnimationTimeline* Timeline() const { return mTimeline; }
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double StartTime() const;
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double CurrentTime() const;
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void SetSource(Animation* aSource);
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void Tick();
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bool IsPaused() const {
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return mPlayState == NS_STYLE_ANIMATION_PLAY_STATE_PAUSED;
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}
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bool IsRunning() const;
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bool IsCurrent() const;
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// Return the duration since the start time of the player, taking into
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// account the pause state. May be negative.
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// Returns a null value if the timeline associated with this object has a
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// current timestamp that is null or if the start time of this object is
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// null.
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Nullable<TimeDuration> GetCurrentTimeDuration() const {
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const TimeStamp& timelineTime = mTimeline->GetCurrentTimeStamp();
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// FIXME: In order to support arbitrary timelines we will need to fix
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// the pause logic to handle the timeline time going backwards.
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MOZ_ASSERT(timelineTime.IsNull() || !IsPaused() ||
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timelineTime >= mPauseStart,
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"if paused, any non-null value of aTime must be at least"
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" mPauseStart");
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Nullable<TimeDuration> result; // Initializes to null
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if (!timelineTime.IsNull() && !mStartTime.IsNull()) {
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result.SetValue((IsPaused() ? mPauseStart : timelineTime) - mStartTime);
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}
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return result;
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}
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nsString mName;
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// The beginning of the delay period.
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TimeStamp mStartTime;
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TimeStamp mPauseStart;
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uint8_t mPlayState;
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bool mIsRunningOnCompositor;
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nsRefPtr<AnimationTimeline> mTimeline;
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nsRefPtr<Animation> mSource;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_AnimationPlayer_h
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