Move language detection to a component

chrome/common/translate/translate_common_metrics.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/common/translate/translate_common_metrics.h"
-
-#include "base/basictypes.h"
-#include "base/metrics/histogram.h"
-
-namespace {
-
-// Constant string values to indicate UMA names. All entries should have
-// a corresponding index in MetricsNameIndex and an entry in |kMetricsEntries|.
-const char kRenderer4LanguageDetection[] = "Renderer4.LanguageDetection";
-const char kTranslateContentLanguage[] = "Translate.ContentLanguage";
-const char kTranslateHtmlLang[] = "Translate.HtmlLang";
-const char kTranslateLanguageVerification[] = "Translate.LanguageVerification";
-const char kTranslateTimeToBeReady[] = "Translate.TimeToBeReady";
-const char kTranslateTimeToLoad[] = "Translate.TimeToLoad";
-const char kTranslateTimeToTranslate[] = "Translate.TimeToTranslate";
-const char kTranslateUserActionDuration[] = "Translate.UserActionDuration";
-const char kTranslatePageScheme[] = "Translate.PageScheme";
-const char kTranslateSimilarLanguageMatch[] = "Translate.SimilarLanguageMatch";
-
-const char kSchemeHttp[] = "http";
-const char kSchemeHttps[] = "https";
-
-struct MetricsEntry {
-  TranslateCommonMetrics::MetricsNameIndex index;
-  const char* const name;
-};
-
-// This entry table should be updated when new UMA items are added.
-const MetricsEntry kMetricsEntries[] = {
-  { TranslateCommonMetrics::UMA_LANGUAGE_DETECTION,
-    kRenderer4LanguageDetection },
-  { TranslateCommonMetrics::UMA_CONTENT_LANGUAGE,
-    kTranslateContentLanguage },
-  { TranslateCommonMetrics::UMA_HTML_LANG,
-    kTranslateHtmlLang },
-  { TranslateCommonMetrics::UMA_LANGUAGE_VERIFICATION,
-    kTranslateLanguageVerification },
-  { TranslateCommonMetrics::UMA_TIME_TO_BE_READY,
-    kTranslateTimeToBeReady },
-  { TranslateCommonMetrics::UMA_TIME_TO_LOAD,
-    kTranslateTimeToLoad },
-  { TranslateCommonMetrics::UMA_TIME_TO_TRANSLATE,
-    kTranslateTimeToTranslate },
-  { TranslateCommonMetrics::UMA_USER_ACTION_DURATION,
-    kTranslateUserActionDuration },
-  { TranslateCommonMetrics::UMA_PAGE_SCHEME,
-    kTranslatePageScheme },
-  { TranslateCommonMetrics::UMA_SIMILAR_LANGUAGE_MATCH,
-    kTranslateSimilarLanguageMatch },
-};
-
-COMPILE_ASSERT(arraysize(kMetricsEntries) == TranslateCommonMetrics::UMA_MAX,
-               arraysize_of_kMetricsEntries_should_be_UMA_MAX);
-
-TranslateCommonMetrics::LanguageCheckType GetLanguageCheckMetric(
-    const std::string& provided_code,
-    const std::string& revised_code) {
-  if (provided_code.empty())
-    return TranslateCommonMetrics::LANGUAGE_NOT_PROVIDED;
-  else if (provided_code == revised_code)
-    return TranslateCommonMetrics::LANGUAGE_VALID;
-  return TranslateCommonMetrics::LANGUAGE_INVALID;
-}
-
-}  // namespace
-
-namespace TranslateCommonMetrics {
-
-void ReportContentLanguage(const std::string& provided_code,
-                           const std::string& revised_code) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateContentLanguage,
-                            GetLanguageCheckMetric(provided_code, revised_code),
-                            TranslateCommonMetrics::LANGUAGE_MAX);
-}
-
-void ReportHtmlLang(const std::string& provided_code,
-                    const std::string& revised_code) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateHtmlLang,
-                            GetLanguageCheckMetric(provided_code, revised_code),
-                            TranslateCommonMetrics::LANGUAGE_MAX);
-}
-
-void ReportLanguageVerification(LanguageVerificationType type) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateLanguageVerification,
-                            type,
-                            LANGUAGE_VERIFICATION_MAX);
-}
-
-void ReportTimeToBeReady(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(
-      kTranslateTimeToBeReady,
-      base::TimeDelta::FromMicroseconds(time_in_msec * 1000.0));
-}
-
-void ReportTimeToLoad(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(
-      kTranslateTimeToLoad,
-      base::TimeDelta::FromMicroseconds(time_in_msec * 1000.0));
-}
-
-void ReportTimeToTranslate(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(
-      kTranslateTimeToTranslate,
-      base::TimeDelta::FromMicroseconds(time_in_msec * 1000.0));
-}
-
-void ReportUserActionDuration(base::TimeTicks begin, base::TimeTicks end) {
-  UMA_HISTOGRAM_LONG_TIMES(kTranslateUserActionDuration, end - begin);
-}
-
-void ReportPageScheme(const std::string& scheme) {
-  SchemeType type = SCHEME_OTHERS;
-  if (scheme == kSchemeHttp)
-    type = SCHEME_HTTP;
-  else if (scheme == kSchemeHttps)
-    type = SCHEME_HTTPS;
-  UMA_HISTOGRAM_ENUMERATION(kTranslatePageScheme, type, SCHEME_MAX);
-}
-
-void ReportLanguageDetectionTime(base::TimeTicks begin, base::TimeTicks end) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(kRenderer4LanguageDetection, end - begin);
-}
-
-void ReportSimilarLanguageMatch(bool match) {
-  UMA_HISTOGRAM_BOOLEAN(kTranslateSimilarLanguageMatch, match);
-}
-
-const char* GetMetricsName(MetricsNameIndex index) {
-  for (size_t i = 0; i < arraysize(kMetricsEntries); ++i) {
-    if (kMetricsEntries[i].index == index)
-      return kMetricsEntries[i].name;
-  }
-  NOTREACHED();
-  return NULL;
-}
-
-} // namespace TranslateCommonMetrics