src/chrome/browser/translate/translate_tab_helper.cc

   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 #include "chrome/browser/translate/translate_tab_helper.h"
   6
   7 #include "chrome/browser/chrome_notification_types.h"
   8 #include "chrome/browser/translate/page_translated_details.h"
   9 #include "chrome/common/render_messages.h"
  10 #include "chrome/common/translate/language_detection_details.h"
  11 #include "content/public/browser/notification_service.h"
  12 #include "content/public/browser/web_contents.h"
  13
  14 using content::WebContents;
  15
  16 DEFINE_WEB_CONTENTS_USER_DATA_KEY(TranslateTabHelper);
  17
  18 TranslateTabHelper::TranslateTabHelper(WebContents* web_contents)
  19     : content::WebContentsObserver(web_contents),
  20       language_state_(&web_contents->GetController()) {
  21 }
  22
  23 TranslateTabHelper::~TranslateTabHelper() {
  24 }
  25
  26 bool TranslateTabHelper::OnMessageReceived(const IPC::Message& message) {
  27   bool handled = true;
  28   IPC_BEGIN_MESSAGE_MAP(TranslateTabHelper, message)
  29     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_TranslateLanguageDetermined,
  30                         OnLanguageDetermined)
  31     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PageTranslated, OnPageTranslated)
  32     IPC_MESSAGE_UNHANDLED(handled = false)
  33   IPC_END_MESSAGE_MAP()
  34
  35   return handled;
  36 }
  37
  38 void TranslateTabHelper::DidNavigateAnyFrame(
  39     const content::LoadCommittedDetails& details,
  40     const content::FrameNavigateParams& params) {
  41   // Let the LanguageState clear its state.
  42   language_state_.DidNavigate(details);
  43 }
  44
  45 void TranslateTabHelper::OnLanguageDetermined(
  46     const LanguageDetectionDetails& details,
  47     bool page_needs_translation) {
  48   language_state_.LanguageDetermined(details.adopted_language,
  49                                      page_needs_translation);
  50
  51   content::NotificationService::current()->Notify(
  52       chrome::NOTIFICATION_TAB_LANGUAGE_DETERMINED,
  53       content::Source<WebContents>(web_contents()),
  54       content::Details<const LanguageDetectionDetails>(&details));
  55 }
  56
  57 void TranslateTabHelper::OnPageTranslated(int32 page_id,
  58                                           const std::string& original_lang,
  59                                           const std::string& translated_lang,
  60                                           TranslateErrors::Type error_type) {
  61   language_state_.set_current_language(translated_lang);
  62   language_state_.set_translation_pending(false);
  63   PageTranslatedDetails details;
  64   details.source_language = original_lang;
  65   details.target_language = translated_lang;
  66   details.error_type = error_type;
  67   content::NotificationService::current()->Notify(
  68       chrome::NOTIFICATION_PAGE_TRANSLATED,
  69       content::Source<WebContents>(web_contents()),
  70       content::Details<PageTranslatedDetails>(&details));
  71 }