blob: cb8be0c798eeeba91018e49d6585ea458dc2716d (
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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_IMAGELIB_PROGRESSOBSERVER_H_
#define MOZILLA_IMAGELIB_PROGRESSOBSERVER_H_
#include "mozilla/WeakPtr.h"
#include "nsISupports.h"
#include "nsRect.h"
namespace mozilla {
namespace image {
/**
* An interface for observing changes to image state, as reported by
* ProgressTracker.
*
* This is the ImageLib-internal version of imgINotificationObserver,
* essentially, with implementation details that code outside of ImageLib
* shouldn't see.
*
* XXX(seth): It's preferable to avoid adding anything to this interface if
* possible. In the long term, it would be ideal to get to a place where we can
* just use the imgINotificationObserver interface internally as well.
*/
class IProgressObserver : public SupportsWeakPtr<IProgressObserver>
{
public:
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(IProgressObserver)
// Subclasses may or may not be XPCOM classes, so we just require that they
// implement AddRef and Release.
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
// imgINotificationObserver methods:
virtual void Notify(int32_t aType, const nsIntRect* aRect = nullptr) = 0;
virtual void OnLoadComplete(bool aLastPart) = 0;
// imgIOnloadBlocker methods:
virtual void BlockOnload() = 0;
virtual void UnblockOnload() = 0;
// Other, internal-only methods:
virtual void SetHasImage() = 0;
virtual void OnStartDecode() = 0;
virtual bool NotificationsDeferred() const = 0;
virtual void SetNotificationsDeferred(bool aDeferNotifications) = 0;
protected:
virtual ~IProgressObserver() { }
};
} // namespace image
} // namespace mozilla
#endif // MOZILLA_IMAGELIB_PROGRESSOBSERVER_H_
|
