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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // DataPack represents a read-only view onto an on-disk file that contains | 5 // DataPack represents a read-only view onto an on-disk file that contains |
6 // (key, value) pairs of data. It's used to store static resources like | 6 // (key, value) pairs of data. It's used to store static resources like |
7 // translation strings and images. | 7 // translation strings and images. |
8 | 8 |
9 #ifndef UI_BASE_RESOURCE_DATA_PACK_H_ | 9 #ifndef UI_BASE_RESOURCE_DATA_PACK_H_ |
10 #define UI_BASE_RESOURCE_DATA_PACK_H_ | 10 #define UI_BASE_RESOURCE_DATA_PACK_H_ |
11 | 11 |
12 #include <map> | 12 #include <map> |
13 | 13 |
14 #include "base/basictypes.h" | 14 #include "base/basictypes.h" |
15 #include "base/files/file.h" | 15 #include "base/files/file.h" |
| 16 #include "base/files/memory_mapped_file.h" |
16 #include "base/memory/scoped_ptr.h" | 17 #include "base/memory/scoped_ptr.h" |
17 #include "base/strings/string_piece.h" | 18 #include "base/strings/string_piece.h" |
18 #include "ui/base/layout.h" | 19 #include "ui/base/layout.h" |
19 #include "ui/base/resource/resource_handle.h" | 20 #include "ui/base/resource/resource_handle.h" |
20 #include "ui/base/ui_base_export.h" | 21 #include "ui/base/ui_base_export.h" |
21 | 22 |
22 namespace base { | 23 namespace base { |
23 class FilePath; | 24 class FilePath; |
24 class MemoryMappedFile; | |
25 class RefCountedStaticMemory; | 25 class RefCountedStaticMemory; |
26 } | 26 } |
27 | 27 |
28 namespace ui { | 28 namespace ui { |
29 | 29 |
30 class UI_BASE_EXPORT DataPack : public ResourceHandle { | 30 class UI_BASE_EXPORT DataPack : public ResourceHandle { |
31 public: | 31 public: |
32 DataPack(ui::ScaleFactor scale_factor); | 32 DataPack(ui::ScaleFactor scale_factor); |
33 virtual ~DataPack(); | 33 virtual ~DataPack(); |
34 | 34 |
35 // Load a pack file from |path|, returning false on error. | 35 // Load a pack file from |path|, returning false on error. |
36 bool LoadFromPath(const base::FilePath& path); | 36 bool LoadFromPath(const base::FilePath& path); |
37 | 37 |
38 // Loads a pack file from |file|, returning false on error. | 38 // Loads a pack file from |file|, returning false on error. |
39 bool LoadFromFile(base::File file); | 39 bool LoadFromFile(base::File file); |
40 | 40 |
| 41 // Loads a pack file from |region| of |file|, returning false on error. |
| 42 bool LoadFromFileRegion(base::File file, |
| 43 const base::MemoryMappedFile::Region& region); |
| 44 |
41 // Writes a pack file containing |resources| to |path|. If there are any | 45 // Writes a pack file containing |resources| to |path|. If there are any |
42 // text resources to be written, their encoding must already agree to the | 46 // text resources to be written, their encoding must already agree to the |
43 // |textEncodingType| specified. If no text resources are present, please | 47 // |textEncodingType| specified. If no text resources are present, please |
44 // indicate BINARY. | 48 // indicate BINARY. |
45 static bool WritePack(const base::FilePath& path, | 49 static bool WritePack(const base::FilePath& path, |
46 const std::map<uint16, base::StringPiece>& resources, | 50 const std::map<uint16, base::StringPiece>& resources, |
47 TextEncodingType textEncodingType); | 51 TextEncodingType textEncodingType); |
48 | 52 |
49 // ResourceHandle implementation: | 53 // ResourceHandle implementation: |
50 virtual bool HasResource(uint16 resource_id) const OVERRIDE; | 54 virtual bool HasResource(uint16 resource_id) const OVERRIDE; |
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71 // The scale of the image in this resource pack relative to images in the 1x | 75 // The scale of the image in this resource pack relative to images in the 1x |
72 // resource pak. | 76 // resource pak. |
73 ui::ScaleFactor scale_factor_; | 77 ui::ScaleFactor scale_factor_; |
74 | 78 |
75 DISALLOW_COPY_AND_ASSIGN(DataPack); | 79 DISALLOW_COPY_AND_ASSIGN(DataPack); |
76 }; | 80 }; |
77 | 81 |
78 } // namespace ui | 82 } // namespace ui |
79 | 83 |
80 #endif // UI_BASE_RESOURCE_DATA_PACK_H_ | 84 #endif // UI_BASE_RESOURCE_DATA_PACK_H_ |
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