1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// Copyright (c) 2011 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/language_usage_metrics.h"
#include <algorithm>
#include "base/metrics/histogram.h"
#include "base/string_tokenizer.h"
#include "base/string_util.h"
namespace {
void RecordAcceptLanguage(Language language) {
UMA_HISTOGRAM_ENUMERATION("LanguageUsageMetrics.AcceptLanguage",
language, NUM_LANGUAGES);
}
} // namespace
// static
void LanguageUsageMetrics::RecordAcceptLanguages(
const std::string& accept_languages) {
// Rethink about the histogram memory costs when the number of languages
// becomes too large.
DCHECK_LE(NUM_LANGUAGES, 300);
std::set<Language> languages;
ParseAcceptLanguages(accept_languages, &languages);
std::for_each(languages.begin(), languages.end(), RecordAcceptLanguage);
}
// static
void LanguageUsageMetrics::RecordApplicationLanguage(
const std::string& application_locale) {
const Language language = ToLanguage(application_locale);
if (language != UNKNOWN_LANGUAGE) {
UMA_HISTOGRAM_ENUMERATION("LanguageUsageMetrics.ApplicationLanguage",
language, NUM_LANGUAGES);
}
}
// static
void LanguageUsageMetrics::ParseAcceptLanguages(
const std::string& accept_languages, std::set<Language>* languages) {
languages->clear();
StringTokenizer locales(accept_languages, ",");
while (locales.GetNext()) {
const Language language = ToLanguage(locales.token());
if (language != UNKNOWN_LANGUAGE) {
languages->insert(language);
}
}
}
// static
Language LanguageUsageMetrics::ToLanguage(const std::string& locale) {
StringTokenizer parts(locale, "-_");
if (!parts.GetNext()) {
return UNKNOWN_LANGUAGE;
}
const std::string language_part = parts.token();
Language language;
if (!LanguageFromCode(language_part.c_str(), &language)) {
return UNKNOWN_LANGUAGE;
}
return language;
}
|
