blob: 853e20374fa0d98251fa24e8f1896c2964f07149 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/* -*- 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"
namespace mozilla {
namespace dom {
class Animation;
class Document;
class AnimationTimeline : public nsISupports, public nsWrapperCache {
public:
explicit AnimationTimeline(nsIGlobalObject* aWindow) : mWindow(aWindow) {
MOZ_ASSERT(mWindow);
}
protected:
virtual ~AnimationTimeline();
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(AnimationTimeline)
nsIGlobalObject* GetParentObject() const { return mWindow; }
// AnimationTimeline methods
virtual Nullable<TimeDuration> GetCurrentTimeAsDuration() const = 0;
// Wrapper functions for AnimationTimeline DOM methods when called from
// script.
Nullable<double> GetCurrentTimeAsDouble() const {
return AnimationUtils::TimeDurationToDouble(GetCurrentTimeAsDuration());
}
TimeStamp GetCurrentTimeAsTimeStamp() const {
Nullable<TimeDuration> currentTime = GetCurrentTimeAsDuration();
return !currentTime.IsNull() ? ToTimeStamp(currentTime.Value())
: TimeStamp();
}
/**
* Returns true if the times returned by GetCurrentTimeAsDuration() 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);
virtual Document* GetDocument() const = 0;
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
|
