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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBSERV ER_H_ | |
6 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBSERV ER_H_ | |
7 | |
8 #include <string> | |
9 #include <vector> | |
10 | |
11 #include "base/callback.h" | |
12 #include "base/files/file_path.h" | |
13 | |
14 namespace chromeos { | |
15 namespace file_system_provider { | |
16 | |
17 class ProvidedFileSystemInfo; | |
18 class RequestManager; | |
19 | |
20 // Observer class to be notified about changes happened to the provided file | |
21 // system, especially observed entries. | |
22 class ProvidedFileSystemObserver { | |
23 public: | |
24 struct ChildChange; | |
25 | |
26 // Type of a change to an observed entry. | |
27 enum ChangeType { CHANGED, DELETED }; | |
28 | |
29 // Lust of child changes. | |
30 typedef std::vector<ChildChange> ChildChanges; | |
31 | |
32 // Represents an observed entry on the file system. | |
33 struct ObservedEntry { | |
34 ObservedEntry(); | |
35 ~ObservedEntry(); | |
36 | |
37 base::FilePath entry_path; | |
38 bool recursive; | |
39 std::string last_tag; | |
40 }; | |
41 | |
42 // Describes a change in an entry contained in an observed directory. | |
43 struct ChildChange { | |
44 ChildChange(); | |
45 ~ChildChange(); | |
46 | |
47 base::FilePath entry_path; | |
48 ChangeType change_type; | |
49 }; | |
50 | |
51 // Called when an observed entry is changed, including removals. |callback| | |
mtomasz
2014/10/03 04:22:48
As described before, the passed |callback| is crea
| |
52 // *must* be called after the entry change is handled. Once all observers | |
53 // call the callback, the tag will be updated and OnObservedEntryTagUpdated | |
54 // called. | |
55 virtual void OnObservedEntryChanged( | |
56 const ProvidedFileSystemInfo& file_system_info, | |
57 const base::FilePath& observed_path, | |
58 ChangeType change_type, | |
59 const ChildChanges& child_changes, | |
60 const base::Closure& callback) = 0; | |
61 | |
62 // Called when tag value is updated for the observed entry. | |
63 virtual void OnObservedEntryTagUpdated( | |
64 const ProvidedFileSystemInfo& file_system_info, | |
65 const base::FilePath& observed_path) = 0; | |
66 | |
67 // Called when list of observed entries is changed. | |
68 virtual void OnObservedEntryListChanged( | |
69 const ProvidedFileSystemInfo& file_system_info) = 0; | |
70 }; | |
71 | |
72 } // namespace file_system_provider | |
73 } // namespace chromeos | |
74 | |
75 #endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBS ERVER_H_ | |
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