src/chrome/browser/translate/translate_tab_helper.h

   1 // Copyright (c) 2011 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_TRANSLATE_TRANSLATE_TAB_HELPER_H_
   6 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_
   7
   8 #include "chrome/browser/tab_contents/language_state.h"
   9 #include "chrome/common/translate/translate_errors.h"
  10 #include "content/public/browser/web_contents_observer.h"
  11 #include "content/public/browser/web_contents_user_data.h"
  12
  13 struct LanguageDetectionDetails;
  14
  15 class TranslateTabHelper
  16     : public content::WebContentsObserver,
  17       public content::WebContentsUserData<TranslateTabHelper> {
  18  public:
  19   virtual ~TranslateTabHelper();
  20
  21   LanguageState& language_state() { return language_state_; }
  22
  23  private:
  24   explicit TranslateTabHelper(content::WebContents* web_contents);
  25   friend class content::WebContentsUserData<TranslateTabHelper>;
  26
  27   // content::WebContentsObserver implementation.
  28   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  29   virtual void DidNavigateAnyFrame(
  30       const content::LoadCommittedDetails& details,
  31       const content::FrameNavigateParams& params) OVERRIDE;
  32
  33   void OnLanguageDetermined(const LanguageDetectionDetails& details,
  34                             bool page_needs_translation);
  35   void OnPageTranslated(int32 page_id,
  36                         const std::string& original_lang,
  37                         const std::string& translated_lang,
  38                         TranslateErrors::Type error_type);
  39
  40   // Information about the language the page is in and has been translated to.
  41   LanguageState language_state_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(TranslateTabHelper);
  44 };
  45
  46 #endif  // CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_