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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 CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_ | |
6 #define CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_ | |
7 | |
8 #include "base/compiler_specific.h" | |
9 #include "base/file_path.h" | |
10 #include "base/memory/weak_ptr.h" | |
11 #include "base/platform_file.h" | |
12 #include "content/common/content_export.h" | |
13 #include "content/public/browser/browser_message_filter.h" | |
14 | |
15 namespace content { | |
16 class RenderProcessHost; | |
17 | |
18 // This class is a message filter that handles a HyphenatorHost message. When | |
19 // this class receives a HyphenatorHostMsg_OpenDictionary message, it opens the | |
20 // specified dictionary and sends its file handle. | |
21 class CONTENT_EXPORT HyphenatorMessageFilter | |
22 : public content::BrowserMessageFilter { | |
23 public: | |
24 explicit HyphenatorMessageFilter( | |
25 content::RenderProcessHost* render_process_host); | |
26 | |
27 // Changes the directory that includes dictionary files. This function | |
28 // provides a method that allows applications to change the directory | |
29 // containing hyphenation dictionaries. When a renderer requests a hyphnation | |
30 // dictionary, this class appends a file name (which consists of a locale, a | |
31 // version number, and an extension) and use it as a dictionary file. That is, | |
32 // This class opens the file "|dictionary_path_|/|locale|-1-0.dic". | |
tony
2012/08/22 19:05:50
Nit: This comment feels verbose. I would just kee
Hironori Bono
2012/08/27 06:57:28
Done. Thanks for noticing my redundant comments.
| |
33 void SetDictionaryBase(const FilePath& directory); | |
34 | |
35 // content::BrowserMessageFilter implementation. | |
36 virtual void OverrideThreadForMessage( | |
37 const IPC::Message& message, | |
38 content::BrowserThread::ID* thread) OVERRIDE; | |
39 virtual bool OnMessageReceived(const IPC::Message& message, | |
40 bool* message_was_ok) OVERRIDE; | |
41 | |
42 private: | |
43 friend class TestHyphenatorMessageFilter; | |
44 | |
45 virtual ~HyphenatorMessageFilter(); | |
46 | |
47 // Called when this object receives HyphenatorHostMsg_OpenDictionary messages. | |
48 virtual void OnOpenDictionary(const string16& locale); | |
49 | |
50 // Opens a hyphenation dictionary for the specified locale. When this locale | |
51 // is an empty string, this function uses US English ("en-US"). | |
52 void OpenDictionary(const string16& locale); | |
53 | |
54 // Sends the hyphenation dictionary file to a renderer in response to its | |
55 // request. If this class cannot open the specified dictionary file, this | |
56 // function sends an IPC::nvalidPlatformFileForTransit value to tell the | |
tony
2012/08/22 19:05:50
Nit: typo: nvalidPlatformFileForTransit -> Invalid
Hironori Bono
2012/08/27 06:57:28
Done. Thanks for noticing this typo.
| |
57 // renderer that a browser cannot open the file. | |
58 void SendDictionary(); | |
59 | |
60 // The RenderProcessHost object that owns this filter. This class uses this | |
61 // object to retrieve the process handle used for creating | |
62 // PlatformFileForTransit objects. | |
63 content::RenderProcessHost* render_process_host_; | |
64 | |
65 // The directory that includes dictionary files. The default value is the | |
66 // directory containing the executable file. | |
67 FilePath dictionary_base_; | |
68 | |
69 // A cached dictionary file. | |
70 base::PlatformFile dictionary_file_; | |
71 | |
72 base::WeakPtrFactory<HyphenatorMessageFilter> weak_factory_; | |
73 | |
74 DISALLOW_COPY_AND_ASSIGN(HyphenatorMessageFilter); | |
75 }; | |
76 | |
77 } // namespace content | |
78 | |
79 #endif // CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_ | |
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