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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/translate/translate_manager.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/renderer_host/translation_service.h"
#include "chrome/browser/tab_contents/navigation_controller.h"
#include "chrome/browser/tab_contents/navigation_entry.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/translate/translate_infobars_delegates.h"
#include "chrome/browser/translate/translate_prefs.h"
#include "chrome/common/notification_details.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/notification_source.h"
#include "chrome/common/notification_type.h"
#include "chrome/common/pref_service.h"
TranslateManager::~TranslateManager() {
}
void TranslateManager::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type.value) {
case NotificationType::NAV_ENTRY_COMMITTED: {
// We have navigated to a new page.
NavigationController* controller =
Source<NavigationController>(source).ptr();
NavigationEntry* entry = controller->GetActiveEntry();
if (!entry->language().empty()) {
// The language for that page is known (it must be a back/forward
// navigation to a page we already visited).
InitiateTranslation(controller->tab_contents(), entry->language());
}
break;
}
case NotificationType::TAB_LANGUAGE_DETERMINED: {
TabContents* tab = Source<TabContents>(source).ptr();
std::string language = *(Details<std::string>(details).ptr());
InitiateTranslation(tab, language);
break;
}
case NotificationType::PAGE_TRANSLATED: {
TabContents* tab = Source<TabContents>(source).ptr();
std::pair<std::string, std::string>* language_pair =
(Details<std::pair<std::string, std::string> >(details).ptr());
PrefService* prefs = GetPrefService(tab);
tab->AddInfoBar(new AfterTranslateInfoBarDelegate(tab, prefs,
language_pair->first,
language_pair->second));
break;
}
default:
NOTREACHED();
}
}
TranslateManager::TranslateManager() {
if (!TranslationService::IsTranslationEnabled())
return;
notification_registrar_.Add(this, NotificationType::NAV_ENTRY_COMMITTED,
NotificationService::AllSources());
notification_registrar_.Add(this, NotificationType::TAB_LANGUAGE_DETERMINED,
NotificationService::AllSources());
notification_registrar_.Add(this, NotificationType::PAGE_TRANSLATED,
NotificationService::AllSources());
}
void TranslateManager::InitiateTranslation(TabContents* tab,
const std::string& page_lang) {
PrefService* prefs = GetPrefService(tab);
NavigationEntry* entry = tab->controller().GetActiveEntry();
if (!entry) {
NOTREACHED();
return;
}
std::string chrome_lang = g_browser_process->GetApplicationLocale();
// We don't want to translate:
// - any Chrome specific page (New Tab Page, Download, History... pages).
// - similar languages (ex: en-US to en).
// - any user black-listed URLs or user selected language combination.
if (entry->url().SchemeIs("chrome") || page_lang == chrome_lang ||
!TranslationService::ShouldTranslatePage(page_lang, chrome_lang) ||
!TranslatePrefs::CanTranslate(prefs, page_lang, entry->url())) {
return;
}
if (TranslatePrefs::ShouldAutoTranslate(prefs, page_lang, chrome_lang)) {
// The user has previously select "always translate" for this language.
tab->TranslatePage(page_lang, chrome_lang);
return;
}
// Prompts the user if he/she wants the page translated.
tab->AddInfoBar(new BeforeTranslateInfoBarDelegate(tab, prefs,
entry->url(),
page_lang, chrome_lang));
}
PrefService* TranslateManager::GetPrefService(TabContents* tab) {
PrefService* prefs = NULL;
if (tab->profile())
prefs = tab->profile()->GetPrefs();
if (prefs)
return prefs;
return g_browser_process->local_state();
}
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