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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_PICKER_H_
6#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_PICKER_H_
7
8#include "base/callback.h"
9#include "ui/shell_dialogs/select_file_dialog.h"
10
11namespace base {
12class FilePath;
13}
14
15namespace content {
16class DownloadItem;
17class DownloadManager;
18class WebContents;
19}
20
21// Handles showing a dialog to the user to ask for the filename for a download.
22class DownloadFilePicker : public ui::SelectFileDialog::Listener {
23 public:
24  // Callback used to pass the user selection back to the owner of this
25  // object.
26  // |virtual_path|: The path chosen by the user. If the user cancels the file
27  //    selection, then this parameter will be the empty path. On Chrome OS,
28  //    this path may contain virtual mount points if the user chose a virtual
29  //    path (e.g. Google Drive).
30  typedef base::Callback<void(const base::FilePath& virtual_path)>
31      FileSelectedCallback;
32
33  // Display a file picker dialog for |item|. The |suggested_path| will be used
34  // as the initial path displayed to the user. |callback| will always be
35  // invoked even if |item| is destroyed prior to the file picker completing.
36  static void ShowFilePicker(content::DownloadItem* item,
37                             const base::FilePath& suggested_path,
38                             const FileSelectedCallback& callback);
39
40 private:
41  DownloadFilePicker(content::DownloadItem* item,
42                     const base::FilePath& suggested_path,
43                     const FileSelectedCallback& callback);
44  virtual ~DownloadFilePicker();
45
46  // Runs |file_selected_callback_| with |virtual_path| and then deletes this
47  // object.
48  void OnFileSelected(const base::FilePath& virtual_path);
49
50  // SelectFileDialog::Listener implementation.
51  virtual void FileSelected(const base::FilePath& path,
52                            int index,
53                            void* params) OVERRIDE;
54  virtual void FileSelectionCanceled(void* params) OVERRIDE;
55
56  // Initially suggested path.
57  base::FilePath suggested_path_;
58
59  // Callback invoked when a file selection is complete.
60  FileSelectedCallback file_selected_callback_;
61
62  // For managing select file dialogs.
63  scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
64
65  // True if UMA regarding on the result of the file selection should be
66  // recorded.
67  bool should_record_file_picker_result_;
68
69  DISALLOW_COPY_AND_ASSIGN(DownloadFilePicker);
70};
71
72#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_PICKER_H_
73