1/* Determine the user's language preferences. 2 Copyright (C) 2004-2006 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify it 5 under the terms of the GNU Library General Public License as published 6 by the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Library General Public License for more details. 13 14 You should have received a copy of the GNU Library General Public 15 License along with this program; if not, write to the Free Software 16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 17 USA. */ 18 19/* Written by Bruno Haible <bruno@clisp.org>. */ 20 21#ifdef HAVE_CONFIG_H 22# include <config.h> 23#endif 24 25#include <stdlib.h> 26 27#if HAVE_CFPREFERENCESCOPYAPPVALUE 28# include <string.h> 29# include <CoreFoundation/CFPreferences.h> 30# include <CoreFoundation/CFPropertyList.h> 31# include <CoreFoundation/CFArray.h> 32# include <CoreFoundation/CFString.h> 33extern void _nl_locale_name_canonicalize (char *name); 34#endif 35 36/* Determine the user's language preferences, as a colon separated list of 37 locale names in XPG syntax 38 language[_territory][.codeset][@modifier] 39 The result must not be freed; it is statically allocated. 40 The LANGUAGE environment variable does not need to be considered; it is 41 already taken into account by the caller. */ 42 43const char * 44_nl_language_preferences_default (void) 45{ 46#if HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.2 or newer */ 47 { 48 /* Cache the preferences list, since CoreFoundation calls are expensive. */ 49 static const char *cached_languages; 50 static int cache_initialized; 51 52 if (!cache_initialized) 53 { 54 CFTypeRef preferences = 55 CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"), 56 kCFPreferencesCurrentApplication); 57 if (preferences != NULL 58 && CFGetTypeID (preferences) == CFArrayGetTypeID ()) 59 { 60 CFArrayRef prefArray = (CFArrayRef)preferences; 61 int n = CFArrayGetCount (prefArray); 62 char buf[256]; 63 size_t size = 0; 64 int i; 65 66 for (i = 0; i < n; i++) 67 { 68 CFTypeRef element = CFArrayGetValueAtIndex (prefArray, i); 69 if (element != NULL 70 && CFGetTypeID (element) == CFStringGetTypeID () 71 && CFStringGetCString ((CFStringRef)element, 72 buf, sizeof (buf), 73 kCFStringEncodingASCII)) 74 { 75 _nl_locale_name_canonicalize (buf); 76 size += strlen (buf) + 1; 77 /* Most GNU programs use msgids in English and don't ship 78 an en.mo message catalog. Therefore when we see "en" 79 in the preferences list, arrange for gettext() to 80 return the msgid, and ignore all further elements of 81 the preferences list. */ 82 if (strcmp (buf, "en") == 0) 83 break; 84 } 85 else 86 break; 87 } 88 if (size > 0) 89 { 90 char *languages = (char *) malloc (size); 91 92 if (languages != NULL) 93 { 94 char *p = languages; 95 96 for (i = 0; i < n; i++) 97 { 98 CFTypeRef element = 99 CFArrayGetValueAtIndex (prefArray, i); 100 if (element != NULL 101 && CFGetTypeID (element) == CFStringGetTypeID () 102 && CFStringGetCString ((CFStringRef)element, 103 buf, sizeof (buf), 104 kCFStringEncodingASCII)) 105 { 106 _nl_locale_name_canonicalize (buf); 107 strcpy (p, buf); 108 p += strlen (buf); 109 *p++ = ':'; 110 if (strcmp (buf, "en") == 0) 111 break; 112 } 113 else 114 break; 115 } 116 *--p = '\0'; 117 118 cached_languages = languages; 119 } 120 } 121 } 122 cache_initialized = 1; 123 } 124 if (cached_languages != NULL) 125 return cached_languages; 126 } 127#endif 128 129 return NULL; 130} 131