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1 /* | 1 /* |
2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) | 2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) |
3 Copyright (C) 2001 Dirk Mueller <mueller@kde.org> | 3 Copyright (C) 2001 Dirk Mueller <mueller@kde.org> |
4 Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) | 4 Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
5 Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. | 5 Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
6 | 6 |
7 This library is free software; you can redistribute it and/or | 7 This library is free software; you can redistribute it and/or |
8 modify it under the terms of the GNU Library General Public | 8 modify it under the terms of the GNU Library General Public |
9 License as published by the Free Software Foundation; either | 9 License as published by the Free Software Foundation; either |
10 version 2 of the License, or (at your option) any later version. | 10 version 2 of the License, or (at your option) any later version. |
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30 | 30 |
31 namespace blink { | 31 namespace blink { |
32 | 32 |
33 class ImageResource; | 33 class ImageResource; |
34 class IntRect; | 34 class IntRect; |
35 | 35 |
36 class CORE_EXPORT ImageResourceObserver { | 36 class CORE_EXPORT ImageResourceObserver { |
37 public: | 37 public: |
38 virtual ~ImageResourceObserver() {} | 38 virtual ~ImageResourceObserver() {} |
39 | 39 |
40 // Called whenever a frame of an image changes, either because we got more dat
a from the network or | 40 // Called whenever a frame of an image changes, either because we got more |
41 // because we are animating. If not null, the IntRect is the changed rect of t
he image. | 41 // data from the network or because we are animating. If not null, the IntRect |
| 42 // is the changed rect of the image. |
42 virtual void imageChanged(ImageResource*, const IntRect* = 0) {} | 43 virtual void imageChanged(ImageResource*, const IntRect* = 0) {} |
43 | 44 |
44 // Called just before ResourceClient::notifyFinished() would be called. | 45 // Called just before ResourceClient::notifyFinished() would be called. This |
45 // This is to avoid an ImageResourceObserver from being | 46 // is to avoid an ImageResourceObserver from being also a ResourceClient just |
46 // also a ResourceClient just to be notified for load finish. | 47 // to be notified for load finish. |
47 virtual void imageNotifyFinished(ImageResource*) {} | 48 virtual void imageNotifyFinished(ImageResource*) {} |
48 | 49 |
49 // Called to find out if this client wants to actually display the image. Used
to tell when we | 50 // Called to find out if this client wants to actually display the image. Used |
50 // can halt animation. Content nodes that hold image refs for example would no
t render the image, | 51 // to tell when we can halt animation. Content nodes that hold image refs for |
51 // but LayoutImages would (assuming they have visibility: visible and their la
yout tree isn't hidden | 52 // example would not render the image, but LayoutImages would (assuming they |
52 // e.g., in the b/f cache or in a background tab). | 53 // have visibility: visible and their layout tree isn't hidden e.g., in the |
| 54 // b/f cache or in a background tab). |
53 virtual bool willRenderImage() { return false; } | 55 virtual bool willRenderImage() { return false; } |
54 | 56 |
55 // Called to get imageAnimation policy from settings | 57 // Called to get imageAnimation policy from settings |
56 virtual bool getImageAnimationPolicy(ImageAnimationPolicy&) { return false; } | 58 virtual bool getImageAnimationPolicy(ImageAnimationPolicy&) { return false; } |
57 | 59 |
58 virtual ResourcePriority computeResourcePriority() const { | 60 virtual ResourcePriority computeResourcePriority() const { |
59 return ResourcePriority(); | 61 return ResourcePriority(); |
60 } | 62 } |
61 | 63 |
62 // Name for debugging, e.g. shown in memory-infra. | 64 // Name for debugging, e.g. shown in memory-infra. |
63 virtual String debugName() const = 0; | 65 virtual String debugName() const = 0; |
64 | 66 |
65 static bool isExpectedType(ImageResourceObserver*) { return true; } | 67 static bool isExpectedType(ImageResourceObserver*) { return true; } |
66 }; | 68 }; |
67 | 69 |
68 } // namespace blink | 70 } // namespace blink |
69 | 71 |
70 #endif | 72 #endif |
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