webcit/gettext.c

   1 /*
   2  * $Id$
   3  */
   4
   5 #include "webcit.h"
   6 #include "webserver.h"
   7
   8 #ifdef ENABLE_NLS
   9
  10 #define NUM_LANGS 10            /* how many different locales do we know? */
  11 #define SEARCH_LANG 20          /* how many langs should we parse? */
  12
  13 /* actual supported locales */
  14 char *AvailLang[NUM_LANGS] = {
  15         "C",
  16         "en_US",
  17         "de_DE",
  18         "it_IT",
  19         "es_ES",
  20         "en_GB",
  21         "da_DK",
  22         "fr_FR",
  23         "nl_NL",
  24         "pt_BR"
  25 };
  26
  27 #ifdef HAVE_USELOCALE
  28 locale_t wc_locales[NUM_LANGS]; /**< here we keep the parsed stuff */
  29 #endif
  30
  31 /** Keep information about one locale */
  32 typedef struct _lang_pref{
  33         char lang[16];          /**< the language locale string */
  34         char region[16];        /**< the region locale string */
  35         long priority;          /**< which priority does it have */
  36         int availability;       /**< do we know it? */
  37         int selectedlang;       /**< is this the selected language? */
  38 } LangStruct;
  39
  40 /* \brief parse browser locale header
  41  * seems as most browsers just do a one after coma value even if more than 10 locales are available. Sample strings:
  42  * opera:
  43  * Accept-Language: sq;q=1.0,de;q=0.9,as;q=0.8,ar;q=0.7,bn;q=0.6,zh-cn;q=0.5,kn;q=0.4,ch;q=0.3,fo;q=0.2,gn;q=0.1,ce;q=0.1,ie;q=0.1
  44  * Firefox
  45  * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3'
  46  * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3
  47  * Accept-Language: de,en-us;q=0.9,it;q=0.9,de-de;q=0.8,en-ph;q=0.7,de-at;q=0.7,zh-cn;q=0.6,cy;q=0.5,ar-om;q=0.5,en-tt;q=0.4,xh;q=0.3,nl-be;q=0.3,cs;q=0.2,sv;q=0.1,tk;q=0.1
  48  * \param LocaleString the string from the browser http headers
  49  */
  50
  51 void httplang_to_locale(char *LocaleString)
  52 {
  53         LangStruct wanted_locales[SEARCH_LANG];
  54         LangStruct *ls;
  55
  56         int i = 0;
  57         int j = 0;
  58         /* size_t len = strlen(LocaleString); */
  59         long prio;
  60         int av;
  61         int nBest;
  62         int nParts;
  63         char search[1024];
  64
  65         safestrncpy(search, LocaleString, sizeof search);
  66         nParts=num_tokens(search,',');
  67         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
  68         {
  69                         char buf[16];
  70                         char sbuf[16];
  71                         char lbuf[16];
  72                         int blen;
  73
  74                         ls=&wanted_locales[i];
  75
  76                         extract_token(&buf[0],search, i,',',16);
  77                         /** we are searching, if this list item has something like ;q=n*/
  78                         if (num_tokens(&buf[0],'=')>1) {
  79                                 int sbuflen, k;
  80                                 extract_token(&sbuf[0],&buf[0], 1,'=',16);
  81                                 sbuflen=strlen(&sbuf[0]);
  82                                 for (k=0; k<sbuflen; k++) if (sbuf[k]=='.') sbuf[k]='0';
  83                                 ls->priority=atol(&sbuf[0]);
  84                         }
  85                         else {
  86                                 ls->priority=1000;
  87                         }
  88                         /** get the locale part */
  89                         extract_token(&sbuf[0],&buf[0],0,';',16);
  90                         /** get the lang part, which should be allways there */
  91                         extract_token(&ls->lang[0],&sbuf[0],0,'-',16);
  92                         /** get the area code if any. */
  93                         if (num_tokens(&sbuf[0],'-')>1) {
  94                                 extract_token(&ls->region[0],&sbuf[0],1,'-',16);
  95                         }
  96                         else { /** no ara code? use lang code */
  97                                 blen=strlen(&ls->lang[0]);
  98                                 memcpy(&ls->region[0], ls->lang,blen);
  99                                 ls->region[blen]='\0';
 100                         } /** area codes are uppercase */
 101                         blen=strlen(&ls->region[0]);
 102                         for (j=0; j<blen; j++)
 103                                 {
 104                                         int chars=toupper(ls->region[j]);
 105                                         ls->region[j]=(char)chars;/** \todo ?! */
 106                                 }
 107                         sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
 108
 109                         /** check if we have this lang */
 110                         ls->availability=1;
 111                         ls->selectedlang=-1;
 112                         for (j=0; j<NUM_LANGS; j++) {
 113                                 int result;
 114                                 /** match against the LANG part */
 115                                 result=strcasecmp(&ls->lang[0], AvailLang[j]);
 116                                 if ((result<0)&&(result<ls->availability)){
 117                                         ls->availability=result;
 118                                         ls->selectedlang=j;
 119                                 }
 120                                 /** match against lang and locale */
 121                                 if (0==strcasecmp(&lbuf[0], AvailLang[j])){
 122                                         ls->availability=0;
 123                                         ls->selectedlang=j;
 124                                         j=NUM_LANGS;
 125                                 }
 126                         }
 127         }
 128
 129         prio=0;
 130         av=-1000;
 131         nBest=-1;
 132         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++) {
 133                 ls=&wanted_locales[i];
 134                 if ((ls->availability<=0)&&
 135                    (av<ls->availability)&&
 136                    (prio<ls->priority)&&
 137                    (ls->selectedlang!=-1)) {
 138                         nBest=ls->selectedlang;
 139                         av=ls->availability;
 140                         prio=ls->priority;
 141                 }
 142         }
 143         if (nBest == -1) {
 144                 /** fall back to C */
 145                 nBest=0;
 146         }
 147         WC->selected_language=nBest;
 148         lprintf(9, "language found: %s\n", AvailLang[WC->selected_language]);
 149 }
 150
 151 /* TODO: we skip the language weighting so far. */
 152 /* Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' */
 153 /* Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 */
 154 //void httplang_to_locale(char *LocaleString)
 155 //{
 156 //      char selected_locale[16];
 157 //      int i, j;
 158 //      char lang[64];
 159 //      int num_accept = 0;
 160 //
 161 //      lprintf(9, "languageAccept: %s\n", LocaleString);
 162 //
 163 //      strcpy(selected_locale, "C");
 164 //      num_accept = num_tokens(LocaleString, ',');
 165 //
 166 //      for (i=num_accept-1; i>=0; --i) {
 167 //              extract_token(lang, LocaleString, i, ',', sizeof lang);
 168 //
 169 //              /* Strip out the weights; we don't use them.  Also convert
 170 //               * hyphens to underscores.
 171 //               */
 172 //              for (j=0; j<strlen(lang); ++j) {
 173 //                      if (lang[j] == '-') lang[j] = '_';
 174 //                      if (lang[j] == ';') lang[j] = 0;
 175 //              }
 176 //
 177 //              for (j=0; j<NUM_LANGS; ++j) {
 178 //                      if (!strncasecmp(lang, AvailLang[j], strlen(lang))) {
 179 //                              strcpy(selected_locale, AvailLang[j]);
 180 //                      }
 181 //              }
 182 //      }
 183 //
 184 //      lprintf(9, "language found: %s\n", selected_locale);
 185 //      set_selected_language(selected_locale);
 186 //}
 187
 188
 189 /**
 190  * \brief show the language chooser on the login dialog
 191  * depending on the browser locale change the sequence of the
 192  * language chooser.
 193  */
 194 void offer_languages(void) {
 195         int i;
 196 #ifndef HAVE_USELOCALE
 197         char *Lang = getenv("LANG");
 198
 199         if (Lang == NULL)
 200                 Lang = "C";
 201 #endif
 202
 203         wprintf("<select name=\"language\" id=\"lname\" size=\"1\">\n");
 204
 205         for (i=0; i < NUM_LANGS; ++i) {
 206 #ifndef HAVE_USELOCALE
 207                 if (strcmp(AvailLang[i], Lang) == 0)
 208 #endif
 209                 wprintf("<option %s value=%s>%s</option>\n",
 210                         ((WC->selected_language == i) ? "selected" : ""),
 211                         AvailLang[i],
 212                         AvailLang[i]
 213                 );
 214         }
 215
 216         wprintf("</select>\n");
 217 }
 218
 219 /**
 220  * \brief Set the selected language for this session.
 221  * \param lang the locale to set.
 222  */
 223 void set_selected_language(const char *lang) {
 224         int i;
 225
 226 #ifdef HAVE_USELOCALE
 227         for (i=0; i<NUM_LANGS; ++i) {
 228                 if (!strcasecmp(lang, AvailLang[i])) {
 229                         WC->selected_language = i;
 230                 }
 231         }
 232 #endif
 233 }
 234
 235 /**
 236  * \brief Activate the selected language for this session.
 237  */
 238 void go_selected_language(void) {
 239 #ifdef HAVE_USELOCALE
 240         if (WC->selected_language < 0) return;
 241         uselocale(wc_locales[WC->selected_language]);   /** switch locales */
 242         textdomain(textdomain(NULL));                   /** clear the cache */
 243 #else
 244         char *language;
 245
 246         language = getenv("LANG");
 247         setlocale(LC_MESSAGES, language);
 248 #endif
 249 }
 250
 251 /**
 252  * \brief Deactivate the selected language for this session.
 253  */
 254 void stop_selected_language(void) {
 255 #ifdef HAVE_USELOCALE
 256         uselocale(LC_GLOBAL_LOCALE);                    /** switch locales */
 257         textdomain(textdomain(NULL));                   /** clear the cache */
 258 #endif
 259 }
 260
 261 void preset_locale(void)
 262 {
 263 #ifndef HAVE_USELOCALE
 264 #ifdef HAVE_GETTEXT
 265         char *language;
 266
 267         lprintf(9, "Nailing locale to %s\n", getenv("LANG"));
 268         language = getenv("LANG");
 269         setlocale(LC_MESSAGES, language);
 270 #endif
 271 #endif
 272 }
 273 /**
 274  * \brief Create a locale_t for each available language
 275  */
 276 void initialize_locales(void) {
 277         int i;
 278         char buf[32];
 279
 280 #ifdef HAVE_USELOCALE
 281         locale_t Empty_Locale;
 282
 283         /* create default locale */
 284         Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
 285 #endif
 286
 287         for (i = 0; i < NUM_LANGS; ++i) {
 288                 if (i == 0) {
 289                         sprintf(buf, "%s", AvailLang[i]);       // locale 0 (C) is ascii, not utf-8
 290                 }
 291                 else {
 292                         sprintf(buf, "%s.UTF8", AvailLang[i]);
 293                 }
 294 #ifdef HAVE_USELOCALE
 295                 wc_locales[i] = newlocale(
 296                         (LC_MESSAGES_MASK|LC_TIME_MASK),
 297                         buf,
 298                         (((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
 299                 );
 300                 if (wc_locales[i] == NULL) {
 301                         lprintf(1, "Error configuring locale for %s: %s\n",
 302                                 buf,
 303                                 strerror(errno)
 304                         );
 305                 }
 306                 else {
 307                         lprintf(3, "Configured available locale: %s\n", buf);
 308                 }
 309 #endif
 310         }
 311 }
 312
 313
 314 #else   /* ENABLE_NLS */
 315 /** \brief dummy for non NLS enabled systems */
 316 void offer_languages(void) {
 317         wprintf("English (US)");
 318 }
 319
 320 /** \brief dummy for non NLS enabled systems */
 321 void set_selected_language(char *lang) {
 322 }
 323
 324 /** \brief dummy for non NLS enabled systems */
 325 void go_selected_language(void) {
 326 }
 327
 328 /** \brief dummy for non NLS enabled systems */
 329 void stop_selected_language(void) {
 330 }
 331
 332 void preset_locale(void)
 333 {
 334 }
 335 #endif  /* ENABLE_NLS */
 336
 337