chrome/browser/download/download_file_picker.h

   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
  11 namespace base {
  12 class FilePath;
  13 }
  14
  15 namespace content {
  16 class DownloadItem;
  17 class DownloadManager;
  18 class WebContents;
  19 }
  20
  21 // Handles showing a dialog to the user to ask for the filename for a download.
  22 class 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   ~DownloadFilePicker() override;
  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   void FileSelected(const base::FilePath& path,
  52                     int index,
  53                     void* params) override;
  54   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_