win8/metro_driver/file_picker_ash.h

   1 // Copyright (c) 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 #ifndef CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_ASH_H_
   5 #define CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_ASH_H_
   6
   7 #include <vector>
   8
   9 #include "base/basictypes.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/files/file_path.h"
  12 #include "base/strings/string16.h"
  13
  14 class ChromeAppViewAsh;
  15 struct MetroViewerHostMsg_SaveAsDialogParams;
  16
  17 namespace base {
  18 class FilePath;
  19 }
  20
  21 // Base class for the file pickers.
  22 class FilePickerSessionBase {
  23  public:
  24   // Creates a file picker for open_file_name.
  25   explicit FilePickerSessionBase(ChromeAppViewAsh* app_view,
  26                                  const string16& title,
  27                                  const string16& filter,
  28                                  const base::FilePath& default_path);
  29
  30   virtual ~FilePickerSessionBase() {
  31   }
  32
  33   // Runs the picker, returns true on success.
  34   bool Run();
  35
  36   const string16& result() const {
  37     return result_;
  38   }
  39
  40   bool success() const {
  41     return success_;
  42   }
  43
  44  protected:
  45   // Creates, configures and starts a file picker.
  46   // If the HRESULT returned is a failure code the file picker has not started,
  47   // so no callbacks should be expected.
  48   virtual HRESULT StartFilePicker() = 0;
  49
  50   // True iff a file picker has successfully finished.
  51   bool success_;
  52
  53   // The title of the file picker.
  54   string16 title_;
  55
  56   // The file type filter.
  57   string16 filter_;
  58
  59   // The starting directory/file name.
  60   base::FilePath default_path_;
  61
  62   // Pointer to the ChromeAppViewAsh instance. We notify the ChromeAppViewAsh
  63   // instance when the file open/save operations complete.
  64   ChromeAppViewAsh* app_view_;
  65
  66   string16 result_;
  67
  68  private:
  69   // Initiate a file picker, must be called on the main metro thread.
  70   // Returns true on success.
  71   bool DoFilePicker();
  72
  73   DISALLOW_COPY_AND_ASSIGN(FilePickerSessionBase);
  74 };
  75
  76 // Provides functionality to display the open file/multiple open file pickers
  77 // metro dialog.
  78 class OpenFilePickerSession : public FilePickerSessionBase {
  79  public:
  80   explicit OpenFilePickerSession(ChromeAppViewAsh* app_view,
  81                                  const string16& title,
  82                                  const string16& filter,
  83                                  const base::FilePath& default_path,
  84                                  bool allow_multi_select);
  85
  86   const std::vector<base::FilePath>& filenames() const {
  87     return filenames_;
  88   }
  89
  90   const bool allow_multi_select() const {
  91     return allow_multi_select_;
  92   }
  93
  94  private:
  95   virtual HRESULT StartFilePicker() OVERRIDE;
  96
  97   typedef winfoundtn::IAsyncOperation<winstorage::StorageFile*>
  98       SingleFileAsyncOp;
  99   typedef winfoundtn::Collections::IVectorView<
 100       winstorage::StorageFile*> StorageFileVectorCollection;
 101   typedef winfoundtn::IAsyncOperation<StorageFileVectorCollection*>
 102       MultiFileAsyncOp;
 103
 104   // Called asynchronously when a single file picker is done.
 105   HRESULT SinglePickerDone(SingleFileAsyncOp* async, AsyncStatus status);
 106
 107   // Called asynchronously when a multi file picker is done.
 108   HRESULT MultiPickerDone(MultiFileAsyncOp* async, AsyncStatus status);
 109
 110   // Composes a multi-file result string suitable for returning to a
 111   // from a storage file collection.
 112   static HRESULT ComposeMultiFileResult(StorageFileVectorCollection* files,
 113                                         string16* result);
 114
 115  private:
 116   // True if the multi file picker is to be displayed.
 117   bool allow_multi_select_;
 118   // If multi select is true then this member contains the list of filenames
 119   // to be returned back.
 120   std::vector<base::FilePath> filenames_;
 121
 122   DISALLOW_COPY_AND_ASSIGN(OpenFilePickerSession);
 123 };
 124
 125 // Provides functionality to display the save file picker.
 126 class SaveFilePickerSession : public FilePickerSessionBase {
 127  public:
 128   explicit SaveFilePickerSession(
 129       ChromeAppViewAsh* app_view,
 130       const MetroViewerHostMsg_SaveAsDialogParams& params);
 131
 132   int SaveFilePickerSession::filter_index() const;
 133
 134  private:
 135   virtual HRESULT StartFilePicker() OVERRIDE;
 136
 137   typedef winfoundtn::IAsyncOperation<winstorage::StorageFile*>
 138       SaveFileAsyncOp;
 139
 140   // Called asynchronously when the save file picker is done.
 141   HRESULT FilePickerDone(SaveFileAsyncOp* async, AsyncStatus status);
 142
 143   int filter_index_;
 144
 145   DISALLOW_COPY_AND_ASSIGN(SaveFilePickerSession);
 146 };
 147
 148 // Provides functionality to display the folder picker.
 149 class FolderPickerSession : public FilePickerSessionBase {
 150  public:
 151   explicit FolderPickerSession(ChromeAppViewAsh* app_view,
 152                                const string16& title);
 153
 154  private:
 155   virtual HRESULT StartFilePicker() OVERRIDE;
 156
 157   typedef winfoundtn::IAsyncOperation<winstorage::StorageFolder*>
 158       FolderPickerAsyncOp;
 159
 160   // Called asynchronously when the folder picker is done.
 161   HRESULT FolderPickerDone(FolderPickerAsyncOp* async, AsyncStatus status);
 162
 163   DISALLOW_COPY_AND_ASSIGN(FolderPickerSession);
 164 };
 165
 166 #endif  // CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_ASH_H_
 167