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_accept_languages.h"
6
7 #include "base/bind.h"
8 #include "base/prefs/pref_service.h"
9 #include "base/strings/string_split.h"
10 #include "base/strings/string_util.h"
11 #include "components/translate/core/browser/translate_download_manager.h"
12 #include "components/translate/core/common/translate_util.h"
13 #include "ui/base/l10n/l10n_util.h"
14
15 namespace translate {
16
TranslateAcceptLanguages(PrefService * prefs,const char * accept_languages_pref)17 TranslateAcceptLanguages::TranslateAcceptLanguages(
18 PrefService* prefs,
19 const char* accept_languages_pref)
20 : accept_languages_pref_(accept_languages_pref) {
21 InitAcceptLanguages(prefs);
22
23 // Also start listening for changes in the accept languages.
24 pref_change_registrar_.Init(prefs);
25 pref_change_registrar_.Add(
26 accept_languages_pref,
27 base::Bind(&TranslateAcceptLanguages::InitAcceptLanguages,
28 base::Unretained(this),
29 prefs));
30 }
31
~TranslateAcceptLanguages()32 TranslateAcceptLanguages::~TranslateAcceptLanguages() {
33 }
34
35 // static
CanBeAcceptLanguage(const std::string & language)36 bool TranslateAcceptLanguages::CanBeAcceptLanguage(
37 const std::string& language) {
38 std::string accept_language = language;
39 translate::ToChromeLanguageSynonym(&accept_language);
40
41 const std::string locale =
42 TranslateDownloadManager::GetInstance()->application_locale();
43 std::vector<std::string> accept_language_codes;
44 l10n_util::GetAcceptLanguagesForLocale(locale, &accept_language_codes);
45
46 if (std::find(accept_language_codes.begin(),
47 accept_language_codes.end(),
48 accept_language) != accept_language_codes.end()) {
49 return true;
50 }
51
52 return false;
53 }
54
IsAcceptLanguage(const std::string & language)55 bool TranslateAcceptLanguages::IsAcceptLanguage(const std::string& language) {
56 std::string accept_language = language;
57 translate::ToChromeLanguageSynonym(&accept_language);
58 return accept_languages_.find(accept_language) != accept_languages_.end();
59 }
60
InitAcceptLanguages(PrefService * prefs)61 void TranslateAcceptLanguages::InitAcceptLanguages(PrefService* prefs) {
62 DCHECK(prefs);
63 // Build the languages.
64 accept_languages_.clear();
65 std::string accept_langs_str = prefs->GetString(
66 accept_languages_pref_.c_str());
67 std::vector<std::string> accept_langs_list;
68 base::SplitString(accept_langs_str, ',', &accept_langs_list);
69 std::vector<std::string>::const_iterator iter;
70
71 for (iter = accept_langs_list.begin();
72 iter != accept_langs_list.end(); ++iter) {
73 // Get rid of the locale extension if any (ex: en-US -> en), but for Chinese
74 // for which the CLD reports zh-CN and zh-TW.
75 std::string accept_lang(*iter);
76 size_t index = iter->find("-");
77 if (index != std::string::npos && *iter != "zh-CN" && *iter != "zh-TW")
78 accept_lang = iter->substr(0, index);
79
80 accept_languages_.insert(accept_lang);
81 }
82 }
83
84 } // namespace translate
85