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1 // Copyright (c) 2011 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 // This class implements a simplified and much stripped down version of | |
6 // Chrome's app/resource_bundle machinery. It notably avoids unwanted | |
7 // dependencies on things like Skia. | |
8 // | |
9 | |
10 #ifndef CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_ | |
11 #define CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_ | |
12 | |
13 #include <windows.h> | |
14 #include <string> | |
15 #include <vector> | |
16 | |
17 #include "base/files/file_path.h" | |
18 #include "base/gtest_prod_util.h" | |
19 #include "base/memory/singleton.h" | |
20 | |
21 namespace ui { | |
22 class DataPack; | |
23 } // namespace ui | |
24 | |
25 class SimpleResourceLoader { | |
26 public: | |
27 | |
28 static SimpleResourceLoader* GetInstance(); | |
29 | |
30 // Returns the language tag for the active language. | |
31 static std::wstring GetLanguage(); | |
32 | |
33 // Helper method to return the string resource identified by message_id | |
34 // from the currently loaded locale dll. | |
35 static std::wstring Get(int message_id); | |
36 | |
37 // Retrieves the HINSTANCE of the loaded module handle. May be NULL if a | |
38 // resource DLL could not be loaded. | |
39 HMODULE GetResourceModuleHandle(); | |
40 | |
41 // Retrieves the preferred languages for the current thread, adding them to | |
42 // |language_tags|. | |
43 static void GetPreferredLanguages(std::vector<std::wstring>* language_tags); | |
44 | |
45 // Populates |locales_path| with the path to the "Locales" directory. | |
46 static void DetermineLocalesDirectory(base::FilePath* locales_path); | |
47 | |
48 // Returns false if |language_tag| is malformed. | |
49 static bool IsValidLanguageTag(const std::wstring& language_tag); | |
50 | |
51 private: | |
52 SimpleResourceLoader(); | |
53 ~SimpleResourceLoader(); | |
54 | |
55 // Finds the most-preferred resource dll and language pack for the laguages | |
56 // in |language_tags| | |
57 // in |locales_path|. | |
58 // | |
59 // Returns true on success with a handle to the DLL that was loaded in | |
60 // |dll_handle|, the data pack in |data_pack| and the locale language in | |
61 // the |language| parameter. | |
62 static bool LoadLocalePack(const std::vector<std::wstring>& language_tags, | |
63 const base::FilePath& locales_path, | |
64 HMODULE* dll_handle, | |
65 ui::DataPack** data_pack, | |
66 std::wstring* language); | |
67 | |
68 // Returns the string resource identified by message_id from the currently | |
69 // loaded locale dll. | |
70 std::wstring GetLocalizedResource(int message_id); | |
71 | |
72 friend struct DefaultSingletonTraits<SimpleResourceLoader>; | |
73 | |
74 FRIEND_TEST_ALL_PREFIXES(SimpleResourceLoaderTest, LoadLocaleDll); | |
75 | |
76 std::wstring language_; | |
77 ui::DataPack* data_pack_; | |
78 | |
79 HINSTANCE locale_dll_handle_; | |
80 }; | |
81 | |
82 #endif // CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_ | |
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