components/translate/core/browser/translate_browser_metrics.cc

   1 // Copyright 2014 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 "components/translate/core/browser/translate_browser_metrics.h"
   6
   7 #include <string>
   8
   9 #include "base/basictypes.h"
  10 #include "base/metrics/histogram.h"
  11 #include "base/metrics/sparse_histogram.h"
  12 #include "components/language_usage_metrics/language_usage_metrics.h"
  13
  14 namespace translate {
  15
  16 namespace {
  17
  18 // Constant string values to indicate UMA names. All entries should have
  19 // a corresponding index in MetricsNameIndex and an entry in |kMetricsEntries|.
  20 const char kTranslateInitiationStatus[] =
  21     "Translate.InitiationStatus.v2";
  22 const char kTranslateReportLanguageDetectionError[] =
  23     "Translate.ReportLanguageDetectionError";
  24 const char kTranslateLocalesOnDisabledByPrefs[] =
  25     "Translate.LocalesOnDisabledByPrefs";
  26 const char kTranslateUndisplayableLanguage[] =
  27     "Translate.UndisplayableLanguage";
  28 const char kTranslateUnsupportedLanguageAtInitiation[] =
  29     "Translate.UnsupportedLanguageAtInitiation";
  30
  31 struct MetricsEntry {
  32   TranslateBrowserMetrics::MetricsNameIndex index;
  33   const char* const name;
  34 };
  35
  36 // This entry table should be updated when new UMA items are added.
  37 const MetricsEntry kMetricsEntries[] = {
  38   { TranslateBrowserMetrics::UMA_INITIATION_STATUS,
  39     kTranslateInitiationStatus },
  40   { TranslateBrowserMetrics::UMA_LANGUAGE_DETECTION_ERROR,
  41     kTranslateReportLanguageDetectionError },
  42   { TranslateBrowserMetrics::UMA_LOCALES_ON_DISABLED_BY_PREFS,
  43     kTranslateLocalesOnDisabledByPrefs },
  44   { TranslateBrowserMetrics::UMA_UNDISPLAYABLE_LANGUAGE,
  45     kTranslateUndisplayableLanguage },
  46   { TranslateBrowserMetrics::UMA_UNSUPPORTED_LANGUAGE_AT_INITIATION,
  47     kTranslateUnsupportedLanguageAtInitiation },
  48 };
  49
  50 static_assert(arraysize(kMetricsEntries) == TranslateBrowserMetrics::UMA_MAX,
  51               "kMetricsEntries should have UMA_MAX elements");
  52
  53 }  // namespace
  54
  55 namespace TranslateBrowserMetrics {
  56
  57 void ReportInitiationStatus(InitiationStatusType type) {
  58   UMA_HISTOGRAM_ENUMERATION(kTranslateInitiationStatus,
  59                             type,
  60                             INITIATION_STATUS_MAX);
  61 }
  62
  63 void ReportLanguageDetectionError() {
  64   UMA_HISTOGRAM_BOOLEAN(kTranslateReportLanguageDetectionError, true);
  65 }
  66
  67 void ReportLocalesOnDisabledByPrefs(const std::string& locale) {
  68   UMA_HISTOGRAM_SPARSE_SLOWLY(
  69       kTranslateLocalesOnDisabledByPrefs,
  70       language_usage_metrics::LanguageUsageMetrics::ToLanguageCode(locale));
  71 }
  72
  73 void ReportUndisplayableLanguage(const std::string& language) {
  74   int language_code =
  75       language_usage_metrics::LanguageUsageMetrics::ToLanguageCode(language);
  76   UMA_HISTOGRAM_SPARSE_SLOWLY(kTranslateUndisplayableLanguage,
  77                               language_code);
  78 }
  79
  80 void ReportUnsupportedLanguageAtInitiation(const std::string& language) {
  81   int language_code =
  82       language_usage_metrics::LanguageUsageMetrics::ToLanguageCode(language);
  83   UMA_HISTOGRAM_SPARSE_SLOWLY(kTranslateUnsupportedLanguageAtInitiation,
  84                               language_code);
  85 }
  86
  87 const char* GetMetricsName(MetricsNameIndex index) {
  88   for (size_t i = 0; i < arraysize(kMetricsEntries); ++i) {
  89     if (kMetricsEntries[i].index == index)
  90       return kMetricsEntries[i].name;
  91   }
  92   NOTREACHED();
  93   return NULL;
  94 }
  95
  96 }  // namespace TranslateBrowserMetrics
  97
  98 }  // namespace translate