Translate: Refactoring: Create TranslateUIDelegate

chrome/browser/translate/translate_infobar_delegate.cc

 // Copyright (c) 2012 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_infobar_delegate.h"
 
 #include <algorithm>
 
 #include "base/i18n/string_compare.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/translate/translate_accept_languages.h"
 #include "chrome/browser/translate/translate_manager.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
+#include "components/translate/common/translate_constants.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "third_party/icu/source/i18n/unicode/coll.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::NavigationEntry;
 
 namespace {
 
+// TODO(hajimehoshi): Remove this after crbug/283720 is solved.
 const char kDeclineTranslate[] = "Translate.DeclineTranslate";
+
 const char kCloseInfobar[] = "Translate.DeclineTranslateCloseInfobar";
-const char kRevertTranslation[] = "Translate.RevertTranslation";
 const char kShowErrorInfobar[] = "Translate.ShowErrorInfobar";
-const char kPerformTranslate[] = "Translate.Translate";
-const char kNeverTranslateLang[] = "Translate.NeverTranslateLang";
-const char kNeverTranslateSite[] = "Translate.NeverTranslateSite";
-const char kAlwaysTranslateLang[] = "Translate.AlwaysTranslateLang";
 
 }  // namespace
 
-// static
-const size_t TranslateInfoBarDelegate::kNoIndex = static_cast<size_t>(-1);
+const size_t TranslateInfoBarDelegate::kNoIndex = TranslateUIDelegate::NO_INDEX;
 
 TranslateInfoBarDelegate::~TranslateInfoBarDelegate() {
 }
 
 // static
 void TranslateInfoBarDelegate::Create(
     bool replace_existing_infobar,
     InfoBarService* infobar_service,
     Type infobar_type,
     const std::string& original_language,
@@ skipping 44 matching lines @@
   if (!old_delegate) {
     infobar_service->AddInfoBar(infobar.PassAs<InfoBarDelegate>());
   } else {
     DCHECK(replace_existing_infobar);
     infobar_service->ReplaceInfoBar(old_delegate,
                                     infobar.PassAs<InfoBarDelegate>());
   }
 }
 
 void TranslateInfoBarDelegate::Translate() {
-  if (!web_contents()->GetBrowserContext()->IsOffTheRecord()) {
-    prefs_.ResetTranslationDeniedCount(original_language_code());
-    prefs_.IncrementTranslationAcceptedCount(original_language_code());
-  }
-
-  TranslateManager::GetInstance()->TranslatePage(web_contents(),
-                                                 original_language_code(),
-                                                 target_language_code());
-
-  UMA_HISTOGRAM_BOOLEAN(kPerformTranslate, true);
+  ui_delegate_.Translate();
 }
 
 void TranslateInfoBarDelegate::RevertTranslation() {
-  TranslateManager::GetInstance()->RevertTranslation(web_contents());
+  ui_delegate_.RevertTranslation();
   RemoveSelf();
-
-  UMA_HISTOGRAM_BOOLEAN(kRevertTranslation, true);
 }
 
 void TranslateInfoBarDelegate::ReportLanguageDetectionError() {
   TranslateManager::GetInstance()->ReportLanguageDetectionError(
       web_contents());
 }
 
 void TranslateInfoBarDelegate::TranslationDeclined() {
   // TODO(miguelg) switch this back to just calling web_contents()
   // once we've diagnosed crbug/283720
+  // TODO(hajimehoshi): Replace this implementstion with calling ui_delegate_.
+  // TranslationDeclined() after miguelg's investigating.
   content::WebContents* contents = owner()->web_contents();
   content::BrowserContext* context = contents->GetBrowserContext();
   if (!context->IsOffTheRecord()) {
     prefs_.ResetTranslationAcceptedCount(original_language_code());
     prefs_.IncrementTranslationDeniedCount(original_language_code());
   }
 
   // Remember that the user declined the translation so as to prevent showing a
   // translate infobar for that page again.  (TranslateManager initiates
   // translations when getting a LANGUAGE_DETERMINED from the page, which
   // happens when a load stops. That could happen multiple times, including
   // after the user already declined the translation.)
   TranslateTabHelper::FromWebContents(web_contents())->
       language_state().set_translation_declined(true);
 
   UMA_HISTOGRAM_BOOLEAN(kDeclineTranslate, true);
 }
 
 bool TranslateInfoBarDelegate::IsTranslatableLanguageByPrefs() {
   Profile* profile =
       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
   Profile* original_profile = profile->GetOriginalProfile();
   return TranslatePrefs::CanTranslateLanguage(original_profile,
                                               original_language_code());
 }
 
 void TranslateInfoBarDelegate::ToggleTranslatableLanguageByPrefs() {
-  const std::string& original_lang = original_language_code();
-  if (prefs_.IsBlockedLanguage(original_lang)) {
-    prefs_.UnblockLanguage(original_lang);
+  if (ui_delegate_.IsLanguageBlocked()) {
+    ui_delegate_.SetLanguageBlocked(false);
   } else {
-    prefs_.BlockLanguage(original_lang);
+    ui_delegate_.SetLanguageBlocked(true);
     RemoveSelf();
   }
-
-  UMA_HISTOGRAM_BOOLEAN(kNeverTranslateLang, true);
 }
 
 bool TranslateInfoBarDelegate::IsSiteBlacklisted() {
-  std::string host = GetPageHost();
-  return !host.empty() && prefs_.IsSiteBlacklisted(host);
+  return ui_delegate_.IsSiteBlacklisted();
 }
 
 void TranslateInfoBarDelegate::ToggleSiteBlacklist() {
-  std::string host = GetPageHost();
-  if (host.empty())
-    return;
-
-  if (prefs_.IsSiteBlacklisted(host)) {
-    prefs_.RemoveSiteFromBlacklist(host);
+  if (ui_delegate_.IsSiteBlacklisted()) {
+    ui_delegate_.SetSiteBlacklist(false);
   } else {
-    prefs_.BlacklistSite(host);
+    ui_delegate_.SetSiteBlacklist(true);
     RemoveSelf();
   }
-
-  UMA_HISTOGRAM_BOOLEAN(kNeverTranslateSite, true);
 }
 
 bool TranslateInfoBarDelegate::ShouldAlwaysTranslate() {
-  return prefs_.IsLanguagePairWhitelisted(original_language_code(),
-                                          target_language_code());
+  return ui_delegate_.ShouldAlwaysTranslate();
 }
 
 void TranslateInfoBarDelegate::ToggleAlwaysTranslate() {
-  const std::string& original_lang = original_language_code();
-  const std::string& target_lang = target_language_code();
-  if (prefs_.IsLanguagePairWhitelisted(original_lang, target_lang))
-    prefs_.RemoveLanguagePairFromWhitelist(original_lang, target_lang);
-  else
-    prefs_.WhitelistLanguagePair(original_lang, target_lang);
-
-  UMA_HISTOGRAM_BOOLEAN(kAlwaysTranslateLang, true);
+  ui_delegate_.SetAlwaysTranslate(!ui_delegate_.ShouldAlwaysTranslate());
 }
 
 void TranslateInfoBarDelegate::AlwaysTranslatePageLanguage() {
-  const std::string& original_lang = original_language_code();
-  const std::string& target_lang = target_language_code();
-  DCHECK(!prefs_.IsLanguagePairWhitelisted(original_lang, target_lang));
-  prefs_.WhitelistLanguagePair(original_lang, target_lang);
+  DCHECK(!ui_delegate_.ShouldAlwaysTranslate());
+  ui_delegate_.SetAlwaysTranslate(true);
   Translate();
 }
 
 void TranslateInfoBarDelegate::NeverTranslatePageLanguage() {
-  std::string original_lang = original_language_code();
-  prefs_.BlockLanguage(original_lang);
+  DCHECK(!ui_delegate_.IsLanguageBlocked());
+  ui_delegate_.SetLanguageBlocked(true);
   RemoveSelf();
 }
 
 string16 TranslateInfoBarDelegate::GetMessageInfoBarText() {
   if (infobar_type_ == TRANSLATING) {
+    string16 target_language_name = language_name_at(target_language_index());
     return l10n_util::GetStringFUTF16(IDS_TRANSLATE_INFOBAR_TRANSLATING_TO,
-                                      language_name_at(target_language_index_));
+                                      target_language_name);
   }
 
   DCHECK_EQ(TRANSLATION_ERROR, infobar_type_);
   UMA_HISTOGRAM_ENUMERATION(kShowErrorInfobar,
                             error_type_,
                             TranslateErrors::TRANSLATE_ERROR_MAX);
   switch (error_type_) {
     case TranslateErrors::NETWORK:
       return l10n_util::GetStringUTF16(
           IDS_TRANSLATE_INFOBAR_ERROR_CANT_CONNECT);
     case TranslateErrors::INITIALIZATION_ERROR:
     case TranslateErrors::TRANSLATION_ERROR:
       return l10n_util::GetStringUTF16(
           IDS_TRANSLATE_INFOBAR_ERROR_CANT_TRANSLATE);
     case TranslateErrors::UNKNOWN_LANGUAGE:
       return l10n_util::GetStringUTF16(
           IDS_TRANSLATE_INFOBAR_UNKNOWN_PAGE_LANGUAGE);
     case TranslateErrors::UNSUPPORTED_LANGUAGE:
       return l10n_util::GetStringFUTF16(
           IDS_TRANSLATE_INFOBAR_UNSUPPORTED_PAGE_LANGUAGE,
-          language_name_at(target_language_index_));
+          language_name_at(target_language_index()));
     case TranslateErrors::IDENTICAL_LANGUAGES:
       return l10n_util::GetStringFUTF16(
           IDS_TRANSLATE_INFOBAR_ERROR_SAME_LANGUAGE,
-          language_name_at(target_language_index_));
+          language_name_at(target_language_index()));
     default:
       NOTREACHED();
       return string16();
   }
 }
 
 string16 TranslateInfoBarDelegate::GetMessageInfoBarButtonText() {
   if (infobar_type_ != TRANSLATION_ERROR) {
     DCHECK_EQ(TRANSLATING, infobar_type_);
   } else if ((error_type_ != TranslateErrors::IDENTICAL_LANGUAGES) &&
@@ skipping 80 matching lines @@
     Type infobar_type,
     TranslateInfoBarDelegate* old_delegate,
     const std::string& original_language,
     const std::string& target_language,
     TranslateErrors::Type error_type,
     PrefService* prefs,
     ShortcutConfiguration shortcut_config)
     : InfoBarDelegate(infobar_service),
       infobar_type_(infobar_type),
       background_animation_(NONE),
-      original_language_index_(kNoIndex),
-      initial_original_language_index_(kNoIndex),
-      target_language_index_(kNoIndex),
+      ui_delegate_(web_contents(), original_language, target_language),
       error_type_(error_type),
       prefs_(prefs),
       shortcut_config_(shortcut_config) {
   DCHECK_NE((infobar_type_ == TRANSLATION_ERROR),
             (error_type_ == TranslateErrors::NONE));
 
   if (old_delegate && (old_delegate->is_error() != is_error()))
     background_animation_ = is_error() ? NORMAL_TO_ERROR : ERROR_TO_NORMAL;
-
-  std::vector<std::string> language_codes;
-  TranslateManager::GetSupportedLanguages(&language_codes);
-
-  // Preparing for the alphabetical order in the locale.
-  UErrorCode error = U_ZERO_ERROR;
-  std::string locale = g_browser_process->GetApplicationLocale();
-  icu::Locale loc(locale.c_str());
-  scoped_ptr<icu::Collator> collator(icu::Collator::createInstance(loc, error));
-  collator->setStrength(icu::Collator::PRIMARY);
-
-  languages_.reserve(language_codes.size());
-  for (std::vector<std::string>::const_iterator iter = language_codes.begin();
-       iter != language_codes.end(); ++iter) {
-    std::string language_code = *iter;
-
-    string16 language_name = GetLanguageDisplayableName(language_code);
-    // Insert the language in languages_ in alphabetical order.
-    std::vector<LanguageNamePair>::iterator iter2;
-    for (iter2 = languages_.begin(); iter2 != languages_.end(); ++iter2) {
-      if (base::i18n::CompareString16WithCollator(collator.get(),
-          language_name, iter2->second) == UCOL_LESS) {
-        break;
-      }
-    }
-    languages_.insert(iter2, LanguageNamePair(language_code, language_name));
-  }
-  for (std::vector<LanguageNamePair>::const_iterator iter = languages_.begin();
-       iter != languages_.end(); ++iter) {
-    std::string language_code = iter->first;
-    if (language_code == original_language) {
-      original_language_index_ = iter - languages_.begin();
-      initial_original_language_index_ = original_language_index_;
-    }
-    if (language_code == target_language)
-      target_language_index_ = iter - languages_.begin();
-  }
-  DCHECK_NE(kNoIndex, target_language_index_);
 }
 
 void TranslateInfoBarDelegate::InfoBarDismissed() {
   if (infobar_type_ != BEFORE_TRANSLATE)
     return;
 
   // The user closed the infobar without clicking the translate button.
   TranslationDeclined();
   UMA_HISTOGRAM_BOOLEAN(kCloseInfobar, true);
 }
@@ skipping 13 matching lines @@
   if (!details.is_navigation_to_different_page() && !details.is_main_frame)
     return false;
 
   return InfoBarDelegate::ShouldExpireInternal(details);
 }
 
 TranslateInfoBarDelegate*
     TranslateInfoBarDelegate::AsTranslateInfoBarDelegate() {
   return this;
 }
-
-std::string TranslateInfoBarDelegate::GetPageHost() {
-  NavigationEntry* entry = web_contents()->GetController().GetActiveEntry();
-  return entry ? entry->GetURL().HostNoBrackets() : std::string();
-}