forked from mirrors/gecko-dev
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_dom_AnimationTimeline_h
|
|
#define mozilla_dom_AnimationTimeline_h
|
|
|
|
#include "nsISupports.h"
|
|
#include "nsWrapperCache.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "js/TypeDecls.h"
|
|
#include "mozilla/AnimationUtils.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsHashKeys.h"
|
|
#include "nsIGlobalObject.h"
|
|
#include "nsTHashtable.h"
|
|
|
|
// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
|
|
// GetTickCount().
|
|
#ifdef GetCurrentTime
|
|
#undef GetCurrentTime
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
class Animation;
|
|
|
|
class AnimationTimeline
|
|
: public nsISupports
|
|
, public nsWrapperCache
|
|
{
|
|
public:
|
|
explicit AnimationTimeline(nsIGlobalObject* aWindow)
|
|
: mWindow(aWindow)
|
|
{
|
|
MOZ_ASSERT(mWindow);
|
|
}
|
|
|
|
protected:
|
|
virtual ~AnimationTimeline()
|
|
{
|
|
mAnimationOrder.clear();
|
|
}
|
|
|
|
public:
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(AnimationTimeline)
|
|
|
|
nsIGlobalObject* GetParentObject() const { return mWindow; }
|
|
|
|
// AnimationTimeline methods
|
|
virtual Nullable<TimeDuration> GetCurrentTime() const = 0;
|
|
|
|
// Wrapper functions for AnimationTimeline DOM methods when called from
|
|
// script.
|
|
Nullable<double> GetCurrentTimeAsDouble() const {
|
|
return AnimationUtils::TimeDurationToDouble(GetCurrentTime());
|
|
}
|
|
|
|
/**
|
|
* Returns true if the times returned by GetCurrentTime() are convertible
|
|
* to and from wallclock-based TimeStamp (e.g. from TimeStamp::Now()) values
|
|
* using ToTimelineTime() and ToTimeStamp().
|
|
*
|
|
* Typically this is true, but it will be false in the case when this
|
|
* timeline has no refresh driver or is tied to a refresh driver under test
|
|
* control.
|
|
*/
|
|
virtual bool TracksWallclockTime() const = 0;
|
|
|
|
/**
|
|
* Converts a TimeStamp to the equivalent value in timeline time.
|
|
* Note that when TracksWallclockTime() is false, there is no correspondence
|
|
* between timeline time and wallclock time. In such a case, passing a
|
|
* timestamp from TimeStamp::Now() to this method will not return a
|
|
* meaningful result.
|
|
*/
|
|
virtual Nullable<TimeDuration> ToTimelineTime(const TimeStamp&
|
|
aTimeStamp) const = 0;
|
|
|
|
virtual TimeStamp ToTimeStamp(const TimeDuration& aTimelineTime) const = 0;
|
|
|
|
/**
|
|
* Inform this timeline that |aAnimation| which is or was observing the
|
|
* timeline, has been updated. This serves as both the means to associate
|
|
* AND disassociate animations with a timeline. The timeline itself will
|
|
* determine if it needs to begin, continue or stop tracking this animation.
|
|
*/
|
|
virtual void NotifyAnimationUpdated(Animation& aAnimation);
|
|
|
|
/**
|
|
* Returns true if any CSS animations, CSS transitions or Web animations are
|
|
* currently associated with this timeline. As soon as an animation is
|
|
* applied to an element it is associated with the timeline even if it has a
|
|
* delayed start, so this includes animations that may not be active for some
|
|
* time.
|
|
*/
|
|
bool HasAnimations() const {
|
|
return !mAnimations.IsEmpty();
|
|
}
|
|
|
|
virtual void RemoveAnimation(Animation* aAnimation);
|
|
|
|
protected:
|
|
nsCOMPtr<nsIGlobalObject> mWindow;
|
|
|
|
// Animations observing this timeline
|
|
//
|
|
// We store them in (a) a hashset for quick lookup, and (b) an array
|
|
// to maintain a fixed sampling order.
|
|
//
|
|
// The hashset keeps a strong reference to each animation since
|
|
// dealing with addref/release with LinkedList is difficult.
|
|
typedef nsTHashtable<nsRefPtrHashKey<dom::Animation>> AnimationSet;
|
|
AnimationSet mAnimations;
|
|
LinkedList<dom::Animation> mAnimationOrder;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_AnimationTimeline_h
|