chrome/browser/chromeos/extensions/input_method_event_router.cc

   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 #include "chrome/browser/chromeos/extensions/input_method_event_router.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/json/json_writer.h"
  10 #include "base/values.h"
  11 #include "chrome/browser/chromeos/extensions/input_method_api.h"
  12 #include "content/public/browser/browser_context.h"
  13 #include "extensions/browser/event_router.h"
  14 #include "extensions/browser/extension_system.h"
  15
  16 namespace chromeos {
  17
  18 ExtensionInputMethodEventRouter::ExtensionInputMethodEventRouter(
  19     content::BrowserContext* context)
  20     : context_(context) {
  21   input_method::InputMethodManager::Get()->AddObserver(this);
  22 }
  23
  24 ExtensionInputMethodEventRouter::~ExtensionInputMethodEventRouter() {
  25   input_method::InputMethodManager::Get()->RemoveObserver(this);
  26 }
  27
  28 void ExtensionInputMethodEventRouter::InputMethodChanged(
  29     input_method::InputMethodManager *manager,
  30     bool show_message) {
  31   extensions::EventRouter* router = extensions::EventRouter::Get(context_);
  32
  33   if (!router->HasEventListener(
  34           extensions::InputMethodAPI::kOnInputMethodChanged)) {
  35     return;
  36   }
  37
  38   scoped_ptr<base::ListValue> args(new base::ListValue());
  39   base::StringValue* input_method_name =
  40       new base::StringValue(extensions::InputMethodAPI::GetInputMethodForXkb(
  41           manager->GetActiveIMEState()->GetCurrentInputMethod().id()));
  42   args->Append(input_method_name);
  43
  44   // The router will only send the event to extensions that are listening.
  45   scoped_ptr<extensions::Event> event(new extensions::Event(
  46       extensions::InputMethodAPI::kOnInputMethodChanged, args.Pass()));
  47   event->restrict_to_browser_context = context_;
  48   router->BroadcastEvent(event.Pass());
  49 }
  50
  51 }  // namespace chromeos