OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef WEBKIT_BROWSER_FILEAPI_FILE_OBSERVERS_H_ | 5 #include "storage/browser/fileapi/file_observers.h" |
6 #define WEBKIT_BROWSER_FILEAPI_FILE_OBSERVERS_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "webkit/browser/storage_browser_export.h" | |
10 | |
11 // TODO(kinuko): Split this file into per-observer multiple files. | |
12 | |
13 namespace storage { | |
14 | |
15 class FileSystemURL; | |
16 | |
17 // An abstract interface to observe update operations. | |
18 // | |
19 // OnStartUpdate and OnEndUpdate are called once for each target url | |
20 // before and after following operations regardless of whether the operation | |
21 // is made recursively or not (i.e. StartUpdate() will be called only once | |
22 // for destination url regardless of whether it is recursive copy or not): | |
23 // CreateFile(), CreateDirectory(), | |
24 // Copy() (destination only), | |
25 // Move() (both for source and destination), | |
26 // Remove(), Write(), Truncate(), TouchFile() | |
27 // | |
28 // OnUpdate() is called each time the |url| is updated but works only for | |
29 // sandboxed files (where usage is tracked). | |
30 class STORAGE_EXPORT FileUpdateObserver { | |
31 public: | |
32 FileUpdateObserver() {} | |
33 virtual ~FileUpdateObserver() {} | |
34 | |
35 virtual void OnStartUpdate(const FileSystemURL& url) = 0; | |
36 virtual void OnUpdate(const FileSystemURL& url, int64 delta) = 0; | |
37 virtual void OnEndUpdate(const FileSystemURL& url) = 0; | |
38 | |
39 private: | |
40 DISALLOW_COPY_AND_ASSIGN(FileUpdateObserver); | |
41 }; | |
42 | |
43 // An abstract interface to observe file access. | |
44 // OnAccess is called whenever an operation reads file contents or metadata. | |
45 // (It is called only once per operation regardless of whether the operation | |
46 // is recursive or not) | |
47 class STORAGE_EXPORT FileAccessObserver { | |
48 public: | |
49 FileAccessObserver() {} | |
50 virtual ~FileAccessObserver() {} | |
51 | |
52 virtual void OnAccess(const FileSystemURL& url) = 0; | |
53 | |
54 private: | |
55 DISALLOW_COPY_AND_ASSIGN(FileAccessObserver); | |
56 }; | |
57 | |
58 // An abstract interface to observe file changes. | |
59 // Each method of this class is called once per file/directory is created, | |
60 // removed or modified. For recursive operations each method is called for | |
61 // each subdirectory/subfile. Currently ChangeObserver is only supported | |
62 // by the local sandbox file system. | |
63 class STORAGE_EXPORT FileChangeObserver { | |
64 public: | |
65 FileChangeObserver() {} | |
66 virtual ~FileChangeObserver() {} | |
67 | |
68 virtual void OnCreateFile(const FileSystemURL& url) = 0; | |
69 virtual void OnCreateFileFrom(const FileSystemURL& url, | |
70 const FileSystemURL& src) = 0; | |
71 virtual void OnRemoveFile(const FileSystemURL& url) = 0; | |
72 virtual void OnModifyFile(const FileSystemURL& url) = 0; | |
73 | |
74 virtual void OnCreateDirectory(const FileSystemURL& url) = 0; | |
75 virtual void OnRemoveDirectory(const FileSystemURL& url) = 0; | |
76 | |
77 private: | |
78 DISALLOW_COPY_AND_ASSIGN(FileChangeObserver); | |
79 }; | |
80 | |
81 } // namespace storage | |
82 | |
83 #endif // WEBKIT_BROWSER_FILEAPI_FILE_OBSERVERS_H_ | |
OLD | NEW |