Copy the implementations of TranslateUIDelegate to TransalteInfobarDelegate

chrome/browser/translate/translate_ui_delegate.cc

 // Copyright 2013 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_ui_delegate.h"
 
 #include "base/i18n/string_compare.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/translate/translate_browser_metrics.h"
 #include "chrome/browser/translate/translate_manager.h"
 #include "chrome/browser/translate/translate_prefs.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
 #include "components/translate/common/translate_constants.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
 #include "third_party/icu/source/i18n/unicode/coll.h"
 #include "ui/base/l10n/l10n_util.h"
 
-namespace {
-
-const char kDeclineTranslate[] = "Translate.DeclineTranslate";
-const char kRevertTranslation[] = "Translate.RevertTranslation";
-const char kPerformTranslate[] = "Translate.Translate";
-const char kNeverTranslateLang[] = "Translate.NeverTranslateLang";
-const char kNeverTranslateSite[] = "Translate.NeverTranslateSite";
-const char kAlwaysTranslateLang[] = "Translate.AlwaysTranslateLang";
-const char kModifyOriginalLang[] = "Translate.ModifyOriginalLang";
-const char kModifyTargetLang[] = "Translate.ModifyTargetLang";
-
-}  // namespace
-
 TranslateUIDelegate::TranslateUIDelegate(content::WebContents* web_contents,
                                          const std::string& original_language,
                                          const std::string& target_language)
     : web_contents_(web_contents),
       original_language_index_(NO_INDEX),
-      initial_original_language_index_(NO_INDEX),
       target_language_index_(NO_INDEX) {
-  std::vector<std::string> language_codes;
-  TranslateManager::GetSupportedLanguages(&language_codes);
+  GetSortedLanguageNames(g_browser_process->GetApplicationLocale(),
+                         &languages_);
 
-  // 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 = l10n_util::GetDisplayNameForLocale(
-        language_code, g_browser_process->GetApplicationLocale(), true);
-    // 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) {
+    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();
   }
 
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   prefs_.reset(new TranslatePrefs(profile->GetPrefs()));
 }
 
 TranslateUIDelegate::~TranslateUIDelegate() {
 }
 
+// static
+void TranslateUIDelegate::GetSortedLanguageNames(
+    const std::string& locale,
+    std::vector<LanguageNamePair>* language_names) {
+  DCHECK(language_names->empty());
+
+  std::vector<std::string> language_codes;
+  TranslateManager::GetSupportedLanguages(&language_codes);
+
+  // Preparing for the alphabetical order in the locale.
+  UErrorCode error = U_ZERO_ERROR;
+  icu::Locale loc(locale.c_str());
+  scoped_ptr<icu::Collator> collator(icu::Collator::createInstance(loc, error));
+  collator->setStrength(icu::Collator::PRIMARY);
+
+  language_names->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 = l10n_util::GetDisplayNameForLocale(
+        language_code, locale, true);
+    // Insert the language in language_names in alphabetical order.
+    std::vector<LanguageNamePair>::iterator iter2;
+    for (iter2 = language_names->begin(); iter2 != language_names->end();
+         ++iter2) {
+      if (base::i18n::CompareString16WithCollator(collator.get(),
+          language_name, iter2->second) == UCOL_LESS) {
+        break;
+      }
+    }
+    language_names->insert(iter2,
+                           LanguageNamePair(language_code, language_name));
+  }
+}
+
+// static
+std::string TranslateUIDelegate::GetPageHost(
+    content::WebContents* web_contents) {
+  content::NavigationEntry* entry =
+      web_contents->GetController().GetActiveEntry();
+  return entry ? entry->GetURL().HostNoBrackets() : std::string();
+}
+
 size_t TranslateUIDelegate::GetNumberOfLanguages() const {
   return languages_.size();
 }
 
 size_t TranslateUIDelegate::GetOriginalLanguageIndex() const {
   return original_language_index_;
 }
 
 void TranslateUIDelegate::UpdateOriginalLanguageIndex(size_t language_index) {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (original_language_index_ == language_index)
     return;
 
-  UMA_HISTOGRAM_BOOLEAN(kModifyOriginalLang, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_MODIFY_ORIGINAL_LANG), true);
   original_language_index_ = language_index;
 }
 
 size_t TranslateUIDelegate::GetTargetLanguageIndex() const {
   return target_language_index_;
 }
 
 void TranslateUIDelegate::UpdateTargetLanguageIndex(size_t language_index) {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (target_language_index_ == language_index)
     return;
 
   DCHECK_LT(language_index, GetNumberOfLanguages());
-  UMA_HISTOGRAM_BOOLEAN(kModifyTargetLang, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_MODIFY_TARGET_LANG), true);
   target_language_index_ = language_index;
 }
 
 
 std::string TranslateUIDelegate::GetLanguageCodeAt(size_t index) const {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   DCHECK_LT(index, GetNumberOfLanguages());
   return languages_[index].first;
 }
 
 string16 TranslateUIDelegate::GetLanguageNameAt(size_t index) const {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (index == static_cast<size_t>(NO_INDEX))
     return string16();
   DCHECK_LT(index, GetNumberOfLanguages());
   return languages_[index].second;
 }
 
 std::string TranslateUIDelegate::GetOriginalLanguageCode() const {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   return (GetOriginalLanguageIndex() == static_cast<size_t>(NO_INDEX)) ?
       translate::kUnknownLanguageCode :
       GetLanguageCodeAt(GetOriginalLanguageIndex());
 }
 
 std::string TranslateUIDelegate::GetTargetLanguageCode() const {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   return GetLanguageCodeAt(GetTargetLanguageIndex());
 }
 
 void TranslateUIDelegate::Translate() {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (!web_contents()->GetBrowserContext()->IsOffTheRecord()) {
     prefs_->ResetTranslationDeniedCount(GetOriginalLanguageCode());
     prefs_->IncrementTranslationAcceptedCount(GetOriginalLanguageCode());
   }
   TranslateManager::GetInstance()->TranslatePage(web_contents(),
                                                  GetOriginalLanguageCode(),
                                                  GetTargetLanguageCode());
 
-  UMA_HISTOGRAM_BOOLEAN(kPerformTranslate, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_PERFORM_TRANSLATE), true);
 }
 
 void TranslateUIDelegate::RevertTranslation() {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   TranslateManager::GetInstance()->RevertTranslation(web_contents());
 
-  UMA_HISTOGRAM_BOOLEAN(kRevertTranslation, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_REVERT_TRANSLATION), true);
 }
 
 void TranslateUIDelegate::TranslationDeclined() {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (!web_contents()->GetBrowserContext()->IsOffTheRecord()) {
     prefs_->ResetTranslationAcceptedCount(GetOriginalLanguageCode());
     prefs_->IncrementTranslationDeniedCount(GetOriginalLanguageCode());
   }
 
   // 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);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_DECLINE_TRANSLATE), true);
 }
 
 bool TranslateUIDelegate::IsLanguageBlocked() {
   return prefs_->IsBlockedLanguage(GetOriginalLanguageCode());
 }
 
 void TranslateUIDelegate::SetLanguageBlocked(bool value) {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   if (value) {
     prefs_->BlockLanguage(GetOriginalLanguageCode());
     TranslateTabHelper* translate_tab_helper =
         TranslateTabHelper::FromWebContents(web_contents());
     DCHECK(translate_tab_helper);
     translate_tab_helper->language_state().SetTranslateEnabled(false);
   } else {
     prefs_->UnblockLanguage(GetOriginalLanguageCode());
   }
 
-  UMA_HISTOGRAM_BOOLEAN(kNeverTranslateLang, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_NEVER_TRANSLATE_LANG), true);
 }
 
 bool TranslateUIDelegate::IsSiteBlacklisted() {
-  std::string host = GetPageHost();
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
+  std::string host = GetPageHost(web_contents());
   return !host.empty() && prefs_->IsSiteBlacklisted(host);
 }
 
 void TranslateUIDelegate::SetSiteBlacklist(bool value) {
-  std::string host = GetPageHost();
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
+  std::string host = GetPageHost(web_contents());
   if (host.empty())
     return;
 
   if (value) {
     prefs_->BlacklistSite(host);
     TranslateTabHelper* translate_tab_helper =
         TranslateTabHelper::FromWebContents(web_contents());
     DCHECK(translate_tab_helper);
     translate_tab_helper->language_state().SetTranslateEnabled(false);
   } else {
     prefs_->RemoveSiteFromBlacklist(host);
   }
 
-  UMA_HISTOGRAM_BOOLEAN(kNeverTranslateSite, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_NEVER_TRANSLATE_SITE), true);
 }
 
 bool TranslateUIDelegate::ShouldAlwaysTranslate() {
   return prefs_->IsLanguagePairWhitelisted(GetOriginalLanguageCode(),
                                            GetTargetLanguageCode());
 }
 
 void TranslateUIDelegate::SetAlwaysTranslate(bool value) {
+  // Note: TranslateInfobarDelegate should be updated if this implementation is
+  // updated.
   const std::string& original_lang = GetOriginalLanguageCode();
   const std::string& target_lang = GetTargetLanguageCode();
   if (value)
     prefs_->WhitelistLanguagePair(original_lang, target_lang);
   else
     prefs_->RemoveLanguagePairFromWhitelist(original_lang, target_lang);
 
-  UMA_HISTOGRAM_BOOLEAN(kAlwaysTranslateLang, true);
+  UMA_HISTOGRAM_BOOLEAN(TranslateBrowserMetrics::GetMetricsName(
+      TranslateBrowserMetrics::UMA_ALWAYS_TRANSLATE_LANG), true);
 }
-
-std::string TranslateUIDelegate::GetPageHost() {
-  content::NavigationEntry* entry =
-      web_contents()->GetController().GetActiveEntry();
-  return entry ? entry->GetURL().HostNoBrackets() : std::string();
-}