Show ChromeVox caption panel when spoken feedback is enabled.

chrome/browser/chromeos/accessibility/accessibility_manager.h

 // Copyright (c) 2013 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_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_MANAGER_H_
 
 #include <set>
 
 #include "ash/session/session_state_observer.h"
 #include "ash/shell_observer.h"
 #include "base/callback_forward.h"
 #include "base/callback_list.h"
 #include "base/memory/weak_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/scoped_observer.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
+#include "chrome/browser/chromeos/accessibility/chromevox_panel.h"
 #include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_system.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
 #include "ui/chromeos/accessibility_types.h"
 
 namespace content {
 class RenderViewHost;
 }
+
 class Profile;
 
 namespace chromeos {
 
 enum AccessibilityNotificationType {
   ACCESSIBILITY_MANAGER_SHUTDOWN,
   ACCESSIBILITY_TOGGLE_HIGH_CONTRAST_MODE,
   ACCESSIBILITY_TOGGLE_LARGE_CURSOR,
   ACCESSIBILITY_TOGGLE_SCREEN_MAGNIFIER,
   ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK,
@@ skipping 21 matching lines @@
 
 typedef base::Callback<void(const AccessibilityStatusEventDetails&)>
     AccessibilityStatusCallback;
 
 typedef base::CallbackList<void(const AccessibilityStatusEventDetails&)>
     AccessibilityStatusCallbackList;
 
 typedef AccessibilityStatusCallbackList::Subscription
     AccessibilityStatusSubscription;
 
+class ChromeVoxPanelWidgetObserver;
+
 // AccessibilityManager changes the statuses of accessibility features
 // watching profile notifications and pref-changes.
 // TODO(yoshiki): merge MagnificationManager with AccessibilityManager.
 class AccessibilityManager
     : public content::NotificationObserver,
       public extensions::api::braille_display_private::BrailleObserver,
       public ash::SessionStateObserver,
       public ash::ShellObserver,
       public input_method::InputMethodManager::Observer {
  public:
@@ skipping 112 matching lines @@
       AccessibilityStatusEventDetails& details);
 
   // Notify accessibility when locale changes occur.
   void OnLocaleChanged();
 
   // Plays an earcon. Earcons are brief and distinctive sounds that indicate
   // when their mapped event has occurred. The sound key enums can be found in
   // chromeos/audio/chromeos_sounds.h.
   void PlayEarcon(int sound_key);
 
+  // Called by our widget observer when the ChromeVoxPanel is closing.
+  void OnChromeVoxPanelClosing();
+  void OnChromeVoxPanelDestroying();
+
   // Profile having the a11y context.
   Profile* profile() { return profile_; }
 
  protected:
   AccessibilityManager();
   ~AccessibilityManager() override;
 
  private:
   void LoadChromeVox();
   void LoadChromeVoxToUserScreen(const base::Closure& done_cb);
@@ skipping 73 matching lines @@
   bool system_sounds_enabled_;
 
   AccessibilityStatusCallbackList callback_list_;
 
   bool braille_display_connected_;
   ScopedObserver<extensions::api::braille_display_private::BrailleController,
                  AccessibilityManager> scoped_braille_observer_;
 
   bool braille_ime_current_;
 
+  ChromeVoxPanel* chromevox_panel_;
+  scoped_ptr<ChromeVoxPanelWidgetObserver> chromevox_panel_widget_observer_;
+
   base::WeakPtrFactory<AccessibilityManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessibilityManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_MANAGER_H_