blob: 3e2adb81029d7d5c9712c6e6e3b78c815f5f835a (
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
|
/* -*- 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/. */
/*
* Code to notify things that animate before a refresh, at an appropriate
* refresh rate. (Perhaps temporary, until replaced by compositor.)
*/
#ifndef LAYOUT_BASE_NSREFRESHOBSERVERS_H_
#define LAYOUT_BASE_NSREFRESHOBSERVERS_H_
#include <functional>
#include "mozilla/Attributes.h"
#include "mozilla/TimeStamp.h"
#include "nsISupports.h"
class nsPresContext;
namespace mozilla {
class AnimationEventDispatcher;
class PendingFullscreenEvent;
class PresShell;
class RefreshDriverTimer;
} // namespace mozilla
/**
* An abstract base class to be implemented by callers wanting to be
* notified at refresh times. When nothing needs to be painted, callers
* may not be notified.
*/
class nsARefreshObserver {
public:
// AddRef and Release signatures that match nsISupports. Implementors
// must implement reference counting, and those that do implement
// nsISupports will already have methods with the correct signature.
//
// The refresh driver does NOT hold references to refresh observers
// except while it is notifying them.
NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
MOZ_CAN_RUN_SCRIPT virtual void WillRefresh(mozilla::TimeStamp aTime) = 0;
};
/**
* An abstract base class to be implemented by callers wanting to be notified
* when the observing refresh driver updated mMostRecentRefresh due to active
* timer changes. Callers must ensure an observer is removed before it is
* destroyed.
*/
class nsATimerAdjustmentObserver {
public:
virtual void NotifyTimerAdjusted(mozilla::TimeStamp aTime) = 0;
};
/**
* An abstract base class to be implemented by callers wanting to be notified
* that a refresh has occurred. Callers must ensure an observer is removed
* before it is destroyed.
*/
class nsAPostRefreshObserver {
public:
virtual void DidRefresh() = 0;
};
namespace mozilla {
/**
* A wrapper for nsAPostRefreshObserver that's refcounted and might unregister
* itself after firing.
*
* Note, while the observer unregisters itself, the registering still needs to
* be done by the caller.
*/
class ManagedPostRefreshObserver : public nsAPostRefreshObserver {
public:
// Whether the post-refresh observer should be unregistered after it has
// fired.
enum class Unregister : bool { No, Yes };
using Action = std::function<Unregister(bool aWasCanceled)>;
NS_INLINE_DECL_REFCOUNTING(ManagedPostRefreshObserver)
ManagedPostRefreshObserver(nsPresContext*, Action&&);
explicit ManagedPostRefreshObserver(nsPresContext*);
void DidRefresh() override;
void Cancel();
protected:
virtual ~ManagedPostRefreshObserver();
RefPtr<nsPresContext> mPresContext;
Action mAction;
};
} // namespace mozilla
#endif
|
