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      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 COMPILE_ASSERT(arraysize(kMetricsEntries) == TranslateBrowserMetrics::UMA_MAX,
     51                arraysize_of_kMetricsEntries_should_be_UMA_MAX);
     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
     99