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