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 "chrome/browser/profiles/profile.h"
  13 #include "content/public/browser/browser_context.h"
  14 #include "extensions/browser/event_router.h"
  15 #include "extensions/browser/extension_system.h"
  16
  17 namespace chromeos {
  18
  19 ExtensionInputMethodEventRouter::ExtensionInputMethodEventRouter(
  20     content::BrowserContext* context)
  21     : context_(context) {
  22   input_method::InputMethodManager::Get()->AddObserver(this);
  23 }
  24
  25 ExtensionInputMethodEventRouter::~ExtensionInputMethodEventRouter() {
  26   input_method::InputMethodManager::Get()->RemoveObserver(this);
  27 }
  28
  29 void ExtensionInputMethodEventRouter::InputMethodChanged(
  30     input_method::InputMethodManager* manager,
  31     Profile* profile,
  32     bool show_message) {
  33   // This should probably be CHECK, as delivering event to a wrong
  34   // profile means delivering it to a wrong extension instance.
  35   DCHECK(profile->IsSameProfile(Profile::FromBrowserContext(context_)));
  36   extensions::EventRouter* router = extensions::EventRouter::Get(context_);
  37
  38   if (!router->HasEventListener(
  39           extensions::InputMethodAPI::kOnInputMethodChanged)) {
  40     return;
  41   }
  42
  43   scoped_ptr<base::ListValue> args(new base::ListValue());
  44   base::StringValue* input_method_name =
  45       new base::StringValue(extensions::InputMethodAPI::GetInputMethodForXkb(
  46           manager->GetActiveIMEState()->GetCurrentInputMethod().id()));
  47   args->Append(input_method_name);
  48
  49   // The router will only send the event to extensions that are listening.
  50   scoped_ptr<extensions::Event> event(new extensions::Event(
  51       extensions::events::INPUT_METHOD_PRIVATE_ON_CHANGED,
  52       extensions::InputMethodAPI::kOnInputMethodChanged, args.Pass()));
  53   event->restrict_to_browser_context = context_;
  54   router->BroadcastEvent(event.Pass());
  55 }
  56
  57 }  // namespace chromeos