ui/base/l10n/l10n_util.h

   1 // Copyright (c) 2012 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 // This file contains utility functions for dealing with localized
   6 // content.
   7
   8 #ifndef UI_BASE_L10N_L10N_UTIL_H_
   9 #define UI_BASE_L10N_L10N_UTIL_H_
  10
  11 #include <string>
  12 #include <vector>
  13
  14 #include "base/strings/string16.h"
  15 #include "base/strings/string_util.h"
  16 #include "ui/base/ui_base_export.h"
  17
  18 #if defined(OS_MACOSX)
  19 #include "ui/base/l10n/l10n_util_mac.h"
  20 #endif  // OS_MACOSX
  21
  22 namespace l10n_util {
  23
  24 // The same as base::i18n::GetCanonicalLocale(const char*), but takes
  25 // std::string as an argument.
  26 UI_BASE_EXPORT std::string GetCanonicalLocale(const std::string& locale);
  27
  28 // This method translates a generic locale name to one of the locally defined
  29 // ones. This method returns true if it succeeds.
  30 UI_BASE_EXPORT bool CheckAndResolveLocale(const std::string& locale,
  31                                           std::string* resolved_locale);
  32
  33 // This method is responsible for determining the locale as defined below. In
  34 // nearly all cases you shouldn't call this, rather use GetApplicationLocale
  35 // defined on browser_process.
  36 //
  37 // Returns the locale used by the Application.  First we use the value from the
  38 // command line (--lang), second we try the value in the prefs file (passed in
  39 // as |pref_locale|), finally, we fall back on the system locale. We only return
  40 // a value if there's a corresponding resource DLL for the locale.  Otherwise,
  41 // we fall back to en-us.
  42 UI_BASE_EXPORT std::string GetApplicationLocale(const std::string& pref_locale);
  43
  44 // Returns true if a display name for |locale| is available in the locale
  45 // |display_locale|.
  46 UI_BASE_EXPORT bool IsLocaleNameTranslated(const char* locale,
  47                                            const std::string& display_locale);
  48
  49 // Given a locale code, return true if the OS is capable of supporting it.
  50 // For instance, Oriya is not well supported on Windows XP and we return
  51 // false for "or".
  52 bool IsLocaleSupportedByOS(const std::string& locale);
  53
  54 // This method returns the display name of the locale code in |display_locale|.
  55
  56 // For example, for |locale| = "fr" and |display_locale| = "en",
  57 // it returns "French". To get the display name of
  58 // |locale| in the UI language of Chrome, |display_locale| can be
  59 // set to the return value of g_browser_process->GetApplicationLocale()
  60 // in the UI thread.
  61 // If |is_for_ui| is true, U+200F is appended so that it can be
  62 // rendered properly in a RTL Chrome.
  63 UI_BASE_EXPORT base::string16 GetDisplayNameForLocale(
  64     const std::string& locale,
  65     const std::string& display_locale,
  66     bool is_for_ui);
  67
  68 // Returns the display name of the |country_code| in |display_locale|.
  69 UI_BASE_EXPORT base::string16 GetDisplayNameForCountry(
  70     const std::string& country_code,
  71     const std::string& display_locale);
  72
  73 // Converts all - into _, to be consistent with ICU and file system names.
  74 UI_BASE_EXPORT std::string NormalizeLocale(const std::string& locale);
  75
  76 // Produce a vector of parent locales for given locale.
  77 // It includes the current locale in the result.
  78 // sr_Cyrl_RS generates sr_Cyrl_RS, sr_Cyrl and sr.
  79 UI_BASE_EXPORT void GetParentLocales(const std::string& current_locale,
  80                                      std::vector<std::string>* parent_locales);
  81
  82 // Checks if a string is plausibly a syntactically-valid locale string,
  83 // for cases where we want the valid input to be a locale string such as
  84 // 'en', 'pt-BR', 'fil', 'es-419', 'zh-Hans-CN', 'i-klingon' or
  85 // 'de_DE@collation=phonebook', but we don't want to limit it to
  86 // locales that Chrome actually knows about, so 'xx-YY' should be
  87 // accepted, but 'z', 'German', 'en-$1', or 'abcd-1234' should not.
  88 // Case-insensitive. Based on BCP 47, see:
  89 //   http://unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers
  90 UI_BASE_EXPORT bool IsValidLocaleSyntax(const std::string& locale);
  91
  92 //
  93 // Mac Note: See l10n_util_mac.h for some NSString versions and other support.
  94 //
  95
  96 // Pulls resource string from the string bundle and returns it.
  97 UI_BASE_EXPORT std::string GetStringUTF8(int message_id);
  98 UI_BASE_EXPORT base::string16 GetStringUTF16(int message_id);
  99
 100 // Get a resource string and replace $i with replacements[i] for all
 101 // i < replacements.size(). Additionally, $$ is replaced by $.
 102 // If non-NULL |offsets| will be replaced with the start points of the replaced
 103 // strings.
 104 UI_BASE_EXPORT base::string16 GetStringFUTF16(
 105     int message_id,
 106     const std::vector<base::string16>& replacements,
 107     std::vector<size_t>* offsets);
 108
 109 // Convenience wrappers for the above.
 110 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 111                                               const base::string16& a);
 112 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 113                                               const base::string16& a,
 114                                               const base::string16& b);
 115 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 116                                               const base::string16& a,
 117                                               const base::string16& b,
 118                                               const base::string16& c);
 119 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 120                                               const base::string16& a,
 121                                               const base::string16& b,
 122                                               const base::string16& c,
 123                                               const base::string16& d);
 124 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 125                                               const base::string16& a,
 126                                               const base::string16& b,
 127                                               const base::string16& c,
 128                                               const base::string16& d,
 129                                               const base::string16& e);
 130 UI_BASE_EXPORT std::string GetStringFUTF8(int message_id,
 131                                           const base::string16& a);
 132 UI_BASE_EXPORT std::string GetStringFUTF8(int message_id,
 133                                           const base::string16& a,
 134                                           const base::string16& b);
 135 UI_BASE_EXPORT std::string GetStringFUTF8(int message_id,
 136                                           const base::string16& a,
 137                                           const base::string16& b,
 138                                           const base::string16& c);
 139 UI_BASE_EXPORT std::string GetStringFUTF8(int message_id,
 140                                           const base::string16& a,
 141                                           const base::string16& b,
 142                                           const base::string16& c,
 143                                           const base::string16& d);
 144
 145 // Variants that return the offset(s) of the replaced parameters. The
 146 // vector based version returns offsets ordered by parameter. For example if
 147 // invoked with a and b offsets[0] gives the offset for a and offsets[1] the
 148 // offset of b regardless of where the parameters end up in the string.
 149 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 150                                               const base::string16& a,
 151                                               size_t* offset);
 152 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
 153                                               const base::string16& a,
 154                                               const base::string16& b,
 155                                               std::vector<size_t>* offsets);
 156
 157 // Convenience functions to get a string with a single number as a parameter.
 158 UI_BASE_EXPORT base::string16 GetStringFUTF16Int(int message_id, int a);
 159 base::string16 GetStringFUTF16Int(int message_id, int64 a);
 160
 161 // Get a resource string using |number| to decide which of |message_ids| should
 162 // be used. |message_ids| must be size 6 and in order: default, singular, zero,
 163 // two, few, many.
 164 UI_BASE_EXPORT base::string16 GetPluralStringFUTF16(
 165     const std::vector<int>& message_ids,
 166     int number);
 167 UI_BASE_EXPORT std::string GetPluralStringFUTF8(
 168     const std::vector<int>& message_ids,
 169     int number);
 170
 171 // In place sorting of base::string16 strings using collation rules for
 172 // |locale|.
 173 UI_BASE_EXPORT void SortStrings16(const std::string& locale,
 174                                   std::vector<base::string16>* strings);
 175
 176 // Returns a vector of available locale codes. E.g., a vector containing
 177 // en-US, es, fr, fi, pt-PT, pt-BR, etc.
 178 UI_BASE_EXPORT const std::vector<std::string>& GetAvailableLocales();
 179
 180 // Returns a vector of locale codes usable for accept-languages.
 181 UI_BASE_EXPORT void GetAcceptLanguagesForLocale(
 182     const std::string& display_locale,
 183     std::vector<std::string>* locale_codes);
 184
 185 // Returns the preferred size of the contents view of a window based on
 186 // designer given constraints which might dependent on the language used.
 187 UI_BASE_EXPORT int GetLocalizedContentsWidthInPixels(int pixel_resource_id);
 188
 189 }  // namespace l10n_util
 190
 191 #endif  // UI_BASE_L10N_L10N_UTIL_H_