chrome/browser/ui/webui/translate_internals/translate_internals_handler.h

   1 // Copyright 2013 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 #ifndef CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/callback_list.h"
  11 #include "chrome/browser/translate/translate_manager.h"
  12 #include "content/public/browser/web_ui_message_handler.h"
  13 #include "content/public/common/webplugininfo.h"
  14
  15 struct LanguageDetectionDetails;
  16 struct TranslateErrorDetails;
  17 struct TranslateEventDetails;
  18
  19 namespace base {
  20 class DictionaryValue;
  21 class ListValue;
  22 class Value;
  23 }
  24
  25 // The handler class for TranslateInternals page operations.
  26 class TranslateInternalsHandler : public content::WebUIMessageHandler,
  27                                   public TranslateManager::Observer {
  28  public:
  29   TranslateInternalsHandler();
  30   virtual ~TranslateInternalsHandler();
  31
  32   // content::WebUIMessageHandler methods:
  33   virtual void RegisterMessages() OVERRIDE;
  34
  35   // TranslateManager::Observer methods:
  36   virtual void OnLanguageDetection(
  37       const LanguageDetectionDetails& details) OVERRIDE;
  38   virtual void OnTranslateError(
  39       const TranslateErrorDetails& details) OVERRIDE;
  40
  41   // Callback for translate events.
  42   virtual void OnTranslateEvent(const TranslateEventDetails& details);
  43
  44  private:
  45   // Handles the Javascript message 'removePrefItem'. This message is sent
  46   // when UI requests to remove an item in the preference.
  47   void OnRemovePrefItem(const base::ListValue* args);
  48
  49   // Handles the Javascript message 'requestInfo'. This message is sent
  50   // when UI needs to show information concerned with the translation.
  51   // For now, this returns only prefs to Javascript.
  52   // |args| is not used.
  53   void OnRequestInfo(const base::ListValue* args);
  54
  55   // Sends a messsage to Javascript.
  56   void SendMessageToJs(const std::string& message, const base::Value& value);
  57
  58   // Sends the current preference to Javascript.
  59   void SendPrefsToJs();
  60
  61   // Sends the languages currently supported by the server to JavaScript.
  62   void SendSupportedLanguagesToJs();
  63
  64   // Subscription for translate events comming from the translate language list.
  65   scoped_ptr<base::CallbackList<
  66       void(const TranslateEventDetails&)>::Subscription> event_subscription_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(TranslateInternalsHandler);
  69 };
  70
  71 #endif  // CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_