Adds extension APIs of events on changing volume.

chrome/browser/extensions/extension_accessibility_api.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/extensions/extension_tabs_module.h"
 
 #include "base/json/json_writer.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_accessibility_api.h"
 #include "chrome/browser/extensions/extension_accessibility_api_constants.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/common/notification_service.h"
 
 namespace keys = extension_accessibility_api_constants;
 
 // Returns the AccessibilityControlInfo serialized into a JSON string,
 // consisting of an array of a single object of type AccessibilityObject,
 // as defined in the accessibility extension api's json schema.
-std::string ControlInfoToJsonString(const AccessibilityControlInfo* info) {
+std::string ControlInfoToJsonString(const AccessibilityEventInfo* info) {
   ListValue args;
   DictionaryValue* dict = new DictionaryValue();
   info->SerializeToDict(dict);
   args.Append(dict);
   std::string json_args;
   base::JSONWriter::Write(&args, false, &json_args);
   return json_args;
 }
 
 ExtensionAccessibilityEventRouter*
@@ skipping 27 matching lines @@
                    NotificationService::AllSources());
     registrar_.Add(this,
                    chrome::NOTIFICATION_ACCESSIBILITY_TEXT_CHANGED,
                    NotificationService::AllSources());
     registrar_.Add(this,
                    chrome::NOTIFICATION_ACCESSIBILITY_MENU_OPENED,
                    NotificationService::AllSources());
     registrar_.Add(this,
                    chrome::NOTIFICATION_ACCESSIBILITY_MENU_CLOSED,
                    NotificationService::AllSources());
+    registrar_.Add(this,
+                   chrome::NOTIFICATION_ACCESSIBILITY_VOLUME_CHANGED,
+                   NotificationService::AllSources());
   }
 }
 
 void ExtensionAccessibilityEventRouter::Observe(
     int type,
     const NotificationSource& source,
     const NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_ACCESSIBILITY_WINDOW_OPENED:
       OnWindowOpened(Details<const AccessibilityWindowInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_WINDOW_CLOSED:
       OnWindowClosed(Details<const AccessibilityWindowInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_CONTROL_FOCUSED:
       OnControlFocused(Details<const AccessibilityControlInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_CONTROL_ACTION:
       OnControlAction(Details<const AccessibilityControlInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_TEXT_CHANGED:
       OnTextChanged(Details<const AccessibilityControlInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_MENU_OPENED:
       OnMenuOpened(Details<const AccessibilityMenuInfo>(details).ptr());
       break;
     case chrome::NOTIFICATION_ACCESSIBILITY_MENU_CLOSED:
       OnMenuClosed(Details<const AccessibilityMenuInfo>(details).ptr());
       break;
+    case chrome::NOTIFICATION_ACCESSIBILITY_VOLUME_CHANGED:
+      OnVolumeChanged(Details<const AccessibilityVolumeInfo>(details).ptr());
+      break;
     default:
       NOTREACHED();
   }
 }
 
 void ExtensionAccessibilityEventRouter::SetAccessibilityEnabled(bool enabled) {
   if (enabled_ != enabled) {
     enabled_ = enabled;
     if (enabled_) {
       for (unsigned int i = 0; i < on_enabled_listeners_.size(); i++) {
@@ skipping 58 matching lines @@
   std::string json_args = ControlInfoToJsonString(info);
   DispatchEvent(info->profile(), keys::kOnMenuOpened, json_args);
 }
 
 void ExtensionAccessibilityEventRouter::OnMenuClosed(
     const AccessibilityMenuInfo* info) {
   std::string json_args = ControlInfoToJsonString(info);
   DispatchEvent(info->profile(), keys::kOnMenuClosed, json_args);
 }
 
+void ExtensionAccessibilityEventRouter::OnVolumeChanged(
+    const AccessibilityVolumeInfo* info) {
+  std::string json_args = ControlInfoToJsonString(info);
+  DispatchEvent(info->profile(), keys::kOnVolumeChanged, json_args);
+}
+
 void ExtensionAccessibilityEventRouter::DispatchEvent(
     Profile* profile,
     const char* event_name,
     const std::string& json_args) {
   if (enabled_ && profile && profile->GetExtensionEventRouter()) {
     profile->GetExtensionEventRouter()->DispatchEventToRenderers(
         event_name, json_args, NULL, GURL());
   }
 }
 
@@ skipping 13 matching lines @@
       ExtensionAccessibilityEventRouter::GetInstance();
   DictionaryValue *last_focused_control_dict =
       accessibility_event_router->last_focused_control_dict();
   if (last_focused_control_dict->size()) {
     result_.reset(last_focused_control_dict->DeepCopyWithoutEmptyChildren());
   } else {
     result_.reset(Value::CreateNullValue());
   }
   return true;
 }