text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_MEDIA_GALLERIES_HANDLER_H_
  #define CHROME_BROWSER_UI_WEBUI_OPTIONS_MEDIA_GALLERIES_HANDLER_H_
  
  #include "base/memory/ref_counted.h"
  #include "base/memory/weak_ptr.h"
  #include "base/prefs/pref_change_registrar.h"
  #include "chrome/browser/media_galleries/media_galleries_preferences.h"
  #include "chrome/browser/ui/webui/options/options_ui.h"
  #include "content/public/browser/notification_observer.h"
  #include "ui/shell_dialogs/select_file_dialog.h"
  
  namespace options {
  
  // Handles messages related to adding or removing media galleries.
  class MediaGalleriesHandler
      : public OptionsPageUIHandler,
        public ui::SelectFileDialog::Listener,
        public MediaGalleriesPreferences::GalleryChangeObserver {
   public:
    MediaGalleriesHandler();
    virtual ~MediaGalleriesHandler();
  
    // OptionsPageUIHandler implementation.
    virtual void GetLocalizedValues(base::DictionaryValue* values) OVERRIDE;
    virtual void RegisterMessages() OVERRIDE;
  
    // SelectFileDialog::Listener implementation.
    virtual void FileSelected(const base::FilePath& path,
                              int index,
                              void* params) OVERRIDE;
  
    // MediaGalleriesPreferences::GalleryChangeObserver overrides.
    virtual void OnGalleryAdded(MediaGalleriesPreferences* pref,
                                MediaGalleryPrefId pref_id) OVERRIDE;
    virtual void OnGalleryRemoved(MediaGalleriesPreferences* pref,
                                  MediaGalleryPrefId pref_id) OVERRIDE;
    virtual void OnGalleryInfoUpdated(MediaGalleriesPreferences* pref,
                                      MediaGalleryPrefId pref_id) OVERRIDE;
  
   private:
    // Handles the "addNewGallery" message (no arguments).
    void HandleAddNewGallery(const base::ListValue* args);
  
    // Handles the "initializeMediaGalleries" message (no arguments).
    void HandleInitializeMediaGalleries(const base::ListValue* args);
  
    // Handles "forgetGallery" message. The first and only argument is the id of
    // the gallery.
    void HandleForgetGallery(const base::ListValue* args);
  
    // Called when the list of known galleries has changed; updates the page.
    void OnGalleriesChanged(MediaGalleriesPreferences* pref);
  
    // Called when MediaGalleriesPreferences have been initialized.
    void PreferencesInitialized();
  
    scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
  
    base::WeakPtrFactory<MediaGalleriesHandler> weak_ptr_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(MediaGalleriesHandler);
  };
  
  }  // namespace options
  
  #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_MEDIA_GALLERIES_HANDLER_H_
  