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Side by Side Diff: Source/core/fetch/ImageResourceClient.h

Issue 1167583003: Move Resource subclasses out of fetch/ (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 5 years, 6 months ago
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1 /*
2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
3 Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
4 Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
5 Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public License
18 along with this library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA.
21 */
22
23 #ifndef ImageResourceClient_h
24 #define ImageResourceClient_h
25
26 #include "core/CoreExport.h"
27 #include "core/fetch/ResourceClient.h"
28 #include "platform/graphics/ImageAnimationPolicy.h"
29
30 namespace blink {
31
32 class ImageResource;
33 class IntRect;
34
35 class CORE_EXPORT ImageResourceClient : public ResourceClient {
36 public:
37 virtual ~ImageResourceClient() { }
38 static ResourceClientType expectedType() { return ImageType; }
39 virtual ResourceClientType resourceClientType() const override final { retur n expectedType(); }
40
41 // Called whenever a frame of an image changes, either because we got more d ata from the network or
42 // because we are animating. If not null, the IntRect is the changed rect of the image.
43 virtual void imageChanged(ImageResource*, const IntRect* = 0) { }
44
45 // Called to find out if this client wants to actually display the image. Us ed to tell when we
46 // can halt animation. Content nodes that hold image refs for example would not render the image,
47 // but LayoutImages would (assuming they have visibility: visible and their layout tree isn't hidden
48 // e.g., in the b/f cache or in a background tab).
49 virtual bool willRenderImage(ImageResource*) { return false; }
50
51 // Called to get imageAnimation policy from settings
52 virtual bool getImageAnimationPolicy(ImageResource*, ImageAnimationPolicy&) { return false; }
53 };
54
55 }
56
57 #endif
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