file_change.h revision 2385ea399aae016c0806a4f9ef3c9cfe3d2a39df 
1// Copyright 2013 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_SYNC_FILE_SYSTEM_FILE_CHANGE_H_
6#define CHROME_BROWSER_SYNC_FILE_SYSTEM_FILE_CHANGE_H_
7
8#include <deque>
9#include <string>
10
11#include "base/basictypes.h"
12#include "base/files/file_path.h"
13#include "chrome/browser/sync_file_system/sync_file_type.h"
14#include "webkit/browser/fileapi/file_system_url.h"
15
16namespace sync_file_system {
17
18class FileChange {
19 public:
20  enum ChangeType {
21    FILE_CHANGE_ADD_OR_UPDATE,
22    FILE_CHANGE_DELETE,
23  };
24
25  FileChange(ChangeType change, SyncFileType file_type);
26
27  bool IsAddOrUpdate() const { return change_ == FILE_CHANGE_ADD_OR_UPDATE; }
28  bool IsDelete() const { return change_ == FILE_CHANGE_DELETE; }
29
30  bool IsFile() const { return file_type_ == SYNC_FILE_TYPE_FILE; }
31  bool IsDirectory() const { return file_type_ == SYNC_FILE_TYPE_DIRECTORY; }
32  bool IsTypeUnknown() const { return !IsFile() && !IsDirectory(); }
33
34  ChangeType change() const { return change_; }
35  SyncFileType file_type() const { return file_type_; }
36
37  std::string DebugString() const;
38
39  bool operator==(const FileChange& that) const {
40    return change() == that.change() &&
41        file_type() == that.file_type();
42  }
43
44 private:
45  ChangeType change_;
46  SyncFileType file_type_;
47};
48
49class FileChangeList {
50 public:
51  typedef std::deque<FileChange> List;
52
53  FileChangeList();
54  ~FileChangeList();
55
56  // Updates the list with the |new_change|.
57  void Update(const FileChange& new_change);
58
59  size_t size() const { return list_.size(); }
60  bool empty() const { return list_.empty(); }
61  void clear() { list_.clear(); }
62  const List& list() const { return list_; }
63  const FileChange& front() const { return list_.front(); }
64  const FileChange& back() const { return list_.back(); }
65
66  FileChangeList PopAndGetNewList() const;
67
68  std::string DebugString() const;
69
70 private:
71  List list_;
72};
73
74}  // namespace sync_file_system
75
76#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_FILE_CHANGE_H_
77