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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_BASE_RESOURCE_RESOURCE_HANDLE_H_ | |
6 #define UI_BASE_RESOURCE_RESOURCE_HANDLE_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/strings/string_piece.h" | |
10 #include "ui/base/layout.h" | |
11 #include "ui/base/ui_base_export.h" | |
12 | |
13 namespace base { | |
14 class RefCountedStaticMemory; | |
15 } | |
16 | |
17 namespace ui { | |
18 | |
19 class UI_BASE_EXPORT ResourceHandle { | |
20 public: | |
21 // What type of encoding the text resources use. | |
22 enum TextEncodingType { | |
23 BINARY, | |
24 UTF8, | |
25 UTF16 | |
26 }; | |
27 | |
28 virtual ~ResourceHandle() {} | |
29 | |
30 // Returns true if the DataPack contains a resource with id |resource_id|. | |
31 virtual bool HasResource(uint16 resource_id) const = 0; | |
32 | |
33 // Get resource by id |resource_id|, filling in |data|. | |
34 // The data is owned by the DataPack object and should not be modified. | |
35 // Returns false if the resource id isn't found. | |
36 virtual bool GetStringPiece(uint16 resource_id, | |
37 base::StringPiece* data) const = 0; | |
38 | |
39 // Like GetStringPiece(), but returns a reference to memory. | |
40 // Caller owns the returned object. | |
41 virtual base::RefCountedStaticMemory* GetStaticMemory( | |
42 uint16 resource_id) const = 0; | |
43 | |
44 // Get the encoding type of text resources. | |
45 virtual TextEncodingType GetTextEncodingType() const = 0; | |
46 | |
47 // The scale of images in this resource pack relative to images in the 1x | |
48 // resource pak. | |
49 virtual ScaleFactor GetScaleFactor() const = 0; | |
50 }; | |
51 | |
52 } // namespace ui | |
53 | |
54 #endif // UI_BASE_RESOURCE_RESOURCE_HANDLE_H_ | |
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