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
|
/* -*- 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_image_MultipartImage_h
#define mozilla_image_MultipartImage_h
#include "ImageWrapper.h"
#include "IProgressObserver.h"
#include "ProgressTracker.h"
namespace mozilla {
namespace image {
class NextPartObserver;
/**
* An Image wrapper that implements support for multipart/x-mixed-replace
* images.
*/
class MultipartImage
: public ImageWrapper
, public IProgressObserver
{
public:
MOZ_DECLARE_REFCOUNTED_TYPENAME(MultipartImage)
NS_DECL_ISUPPORTS_INHERITED
void BeginTransitionToPart(Image* aNextPart);
// Overridden ImageWrapper methods:
virtual already_AddRefed<imgIContainer> Unwrap() override;
virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
virtual void SetProgressTracker(ProgressTracker* aTracker) override;
virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInStr,
uint64_t aSourceOffset,
uint32_t aCount) override;
virtual nsresult OnImageDataComplete(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatus,
bool aLastPart) override;
// We don't support locking or track animation consumers for individual parts,
// so we override these methods to do nothing.
NS_IMETHOD LockImage() override { return NS_OK; }
NS_IMETHOD UnlockImage() override { return NS_OK; }
virtual void IncrementAnimationConsumers() override { }
virtual void DecrementAnimationConsumers() override { }
#ifdef DEBUG
virtual uint32_t GetAnimationConsumers() override { return 1; }
#endif
// Overridden IProgressObserver methods:
virtual void Notify(int32_t aType,
const nsIntRect* aRect = nullptr) override;
virtual void OnLoadComplete(bool aLastPart) override;
virtual void SetHasImage() override;
virtual bool NotificationsDeferred() const override;
virtual void SetNotificationsDeferred(bool aDeferNotifications) override;
// We don't allow multipart images to block onload, so we override these
// methods to do nothing.
virtual void BlockOnload() override { }
virtual void UnblockOnload() override { }
protected:
virtual ~MultipartImage();
private:
friend class ImageFactory;
friend class NextPartObserver;
explicit MultipartImage(Image* aFirstPart);
void Init();
void FinishTransition();
RefPtr<ProgressTracker> mTracker;
RefPtr<NextPartObserver> mNextPartObserver;
RefPtr<Image> mNextPart;
bool mDeferNotifications : 1;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_MultipartImage_h
|
