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