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 const 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 const char *AvailLangLoaded[NUM_LANGS];
  28 long nLocalesLoaded = 0;
  29
  30 #ifdef HAVE_USELOCALE
  31 locale_t wc_locales[NUM_LANGS]; /**< here we keep the parsed stuff */
  32 #endif
  33
  34 /** Keep information about one locale */
  35 typedef struct _lang_pref{
  36         char lang[16];          /**< the language locale string */
  37         char region[16];        /**< the region locale string */
  38         long priority;          /**< which priority does it have */
  39         int availability;       /**< do we know it? */
  40         int selectedlang;       /**< is this the selected language? */
  41 } LangStruct;
  42
  43 /* \brief parse browser locale header
  44  * seems as most browsers just do a one after coma value even if more than 10 locales are available. Sample strings:
  45  * opera:
  46  * 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
  47  * Firefox
  48  * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3'
  49  * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3
  50  * 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
  51  * \param LocaleString the string from the browser http headers
  52  */
  53
  54 void httplang_to_locale(char *LocaleString)
  55 {
  56         LangStruct wanted_locales[SEARCH_LANG];
  57         LangStruct *ls;
  58
  59         int i = 0;
  60         int j = 0;
  61         /* size_t len = strlen(LocaleString); */
  62         long prio;
  63         int av;
  64         int nBest;
  65         int nParts;
  66         char search[1024];
  67
  68         safestrncpy(search, LocaleString, sizeof search);
  69         nParts=num_tokens(search,',');
  70         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
  71         {
  72                         char buf[16];
  73                         char sbuf[16];
  74                         char lbuf[16];
  75                         int blen;
  76
  77                         ls=&wanted_locales[i];
  78
  79                         extract_token(&buf[0],search, i,',',16);
  80                         /** we are searching, if this list item has something like ;q=n*/
  81                         if (num_tokens(&buf[0],'=')>1) {
  82                                 int sbuflen, k;
  83                                 extract_token(&sbuf[0],&buf[0], 1,'=',16);
  84                                 sbuflen=strlen(&sbuf[0]);
  85                                 for (k=0; k<sbuflen; k++) if (sbuf[k]=='.') sbuf[k]='0';
  86                                 ls->priority=atol(&sbuf[0]);
  87                         }
  88                         else {
  89                                 ls->priority=1000;
  90                         }
  91                         /** get the locale part */
  92                         extract_token(&sbuf[0],&buf[0],0,';',16);
  93                         /** get the lang part, which should be allways there */
  94                         extract_token(&ls->lang[0],&sbuf[0],0,'-',16);
  95                         /** get the area code if any. */
  96                         if (num_tokens(&sbuf[0],'-')>1) {
  97                                 extract_token(&ls->region[0],&sbuf[0],1,'-',16);
  98                         }
  99                         else { /** no ara code? use lang code */
 100                                 blen=strlen(&ls->lang[0]);
 101                                 memcpy(&ls->region[0], ls->lang,blen);
 102                                 ls->region[blen]='\0';
 103                         } /** area codes are uppercase */
 104                         blen=strlen(&ls->region[0]);
 105                         for (j=0; j<blen; j++)
 106                                 {
 107                                         int chars=toupper(ls->region[j]);
 108                                         ls->region[j]=(char)chars;/** \todo ?! */
 109                                 }
 110                         sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
 111
 112                         /** check if we have this lang */
 113                         ls->availability=1;
 114                         ls->selectedlang=-1;
 115                         for (j=0; j<nLocalesLoaded; j++) {
 116                                 int result;
 117                                 /** match against the LANG part */
 118                                 result=strcasecmp(&ls->lang[0], AvailLangLoaded[j]);
 119                                 if ((result<0)&&(result<ls->availability)){
 120                                         ls->availability=result;
 121                                         ls->selectedlang=j;
 122                                 }
 123                                 /** match against lang and locale */
 124                                 if (0==strcasecmp(&lbuf[0], AvailLangLoaded[j])){
 125                                         ls->availability=0;
 126                                         ls->selectedlang=j;
 127                                         j=nLocalesLoaded;
 128                                 }
 129                         }
 130         }
 131
 132         prio=0;
 133         av=-1000;
 134         nBest=-1;
 135         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++) {
 136                 ls=&wanted_locales[i];
 137                 if ((ls->availability<=0)&&
 138                    (av<ls->availability)&&
 139                    (prio<ls->priority)&&
 140                    (ls->selectedlang!=-1)) {
 141                         nBest=ls->selectedlang;
 142                         av=ls->availability;
 143                         prio=ls->priority;
 144                 }
 145         }
 146         if (nBest == -1) {
 147                 /** fall back to C */
 148                 nBest=0;
 149         }
 150         WC->selected_language=nBest;
 151         lprintf(9, "language found: %s\n", AvailLangLoaded[WC->selected_language]);
 152 }
 153
 154 /* TODO: we skip the language weighting so far. */
 155 /* Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' */
 156 /* Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 */
 157 //void httplang_to_locale(char *LocaleString)
 158 //{
 159 //      char selected_locale[16];
 160 //      int i, j;
 161 //      char lang[64];
 162 //      int num_accept = 0;
 163 //
 164 //      lprintf(9, "languageAccept: %s\n", LocaleString);
 165 //
 166 //      strcpy(selected_locale, "C");
 167 //      num_accept = num_tokens(LocaleString, ',');
 168 //
 169 //      for (i=num_accept-1; i>=0; --i) {
 170 //              extract_token(lang, LocaleString, i, ',', sizeof lang);
 171 //
 172 //              /* Strip out the weights; we don't use them.  Also convert
 173 //               * hyphens to underscores.
 174 //               */
 175 //              for (j=0; j<strlen(lang); ++j) {
 176 //                      if (lang[j] == '-') lang[j] = '_';
 177 //                      if (lang[j] == ';') lang[j] = 0;
 178 //              }
 179 //
 180 //              for (j=0; j<NUM_LANGS; ++j) {
 181 //                      if (!strncasecmp(lang, AvailLang[j], strlen(lang))) {
 182 //                              strcpy(selected_locale, AvailLang[j]);
 183 //                      }
 184 //              }
 185 //      }
 186 //
 187 //      lprintf(9, "language found: %s\n", selected_locale);
 188 //      set_selected_language(selected_locale);
 189 //}
 190
 191
 192 /**
 193  * \brief show the language chooser on the login dialog
 194  * depending on the browser locale change the sequence of the
 195  * language chooser.
 196  */
 197 void offer_languages(void) {
 198         int i;
 199 #ifndef HAVE_USELOCALE
 200         char *Lang = getenv("LANG");
 201
 202         if (Lang == NULL)
 203                 Lang = "C";
 204 #endif
 205
 206         wprintf("<select name=\"language\" id=\"lname\" size=\"1\">\n");
 207
 208         for (i=0; i < nLocalesLoaded; ++i) {
 209 #ifndef HAVE_USELOCALE
 210                 if (strcmp(AvailLangLoaded[i], Lang) == 0)
 211 #endif
 212                 wprintf("<option %s value=%s>%s</option>\n",
 213                         ((WC->selected_language == i) ? "selected" : ""),
 214                         AvailLangLoaded[i],
 215                         AvailLangLoaded[i]
 216                 );
 217         }
 218
 219         wprintf("</select>\n");
 220 }
 221
 222 /**
 223  * \brief Set the selected language for this session.
 224  * \param lang the locale to set.
 225  */
 226 void set_selected_language(const char *lang) {
 227         int i;
 228
 229 #ifdef HAVE_USELOCALE
 230         for (i=0; i<nLocalesLoaded; ++i) {
 231                 if (!strcasecmp(lang, AvailLangLoaded[i])) {
 232                         WC->selected_language = i;
 233                 }
 234         }
 235 #endif
 236 }
 237
 238 /**
 239  * \brief Activate the selected language for this session.
 240  */
 241 void go_selected_language(void) {
 242 #ifdef HAVE_USELOCALE
 243         struct wcsession *WCC = WC;
 244         if (WCC->selected_language < 0) return;
 245         uselocale(wc_locales[WCC->selected_language]);  /** switch locales */
 246         textdomain(textdomain(NULL));                   /** clear the cache */
 247 #else
 248         char *language;
 249
 250         language = getenv("LANG");
 251         setlocale(LC_MESSAGES, language);
 252 #endif
 253 }
 254
 255 /**
 256  * \brief Deactivate the selected language for this session.
 257  */
 258 void stop_selected_language(void) {
 259 #ifdef HAVE_USELOCALE
 260         uselocale(LC_GLOBAL_LOCALE);                    /** switch locales */
 261         textdomain(textdomain(NULL));                   /** clear the cache */
 262 #endif
 263 }
 264
 265 void preset_locale(void)
 266 {
 267 #ifndef HAVE_USELOCALE
 268 #ifdef HAVE_GETTEXT
 269         char *language;
 270
 271         lprintf(9, "Nailing locale to %s\n", getenv("LANG"));
 272         language = getenv("LANG");
 273         setlocale(LC_MESSAGES, language);
 274 #endif
 275 #endif
 276 }
 277
 278 #ifdef HAVE_USELOCALE
 279         locale_t Empty_Locale;
 280 #endif
 281
 282 /**
 283  * \brief Create a locale_t for each available language
 284  */
 285 void initialize_locales(void) {
 286         int i;
 287         char buf[32];
 288
 289 #ifdef HAVE_USELOCALE
 290         /* create default locale */
 291         Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
 292 #endif
 293
 294         for (i = 0; i < NUM_LANGS; ++i) {
 295                 if (i == 0) {
 296                         sprintf(buf, "%s", AvailLang[i]);       // locale 0 (C) is ascii, not utf-8
 297                 }
 298                 else {
 299                         sprintf(buf, "%s.UTF8", AvailLang[i]);
 300                 }
 301 #ifdef HAVE_USELOCALE
 302                 wc_locales[nLocalesLoaded] = newlocale(
 303                         (LC_MESSAGES_MASK|LC_TIME_MASK),
 304                         buf,
 305                         (((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
 306                 );
 307                 if (wc_locales[nLocalesLoaded] == NULL) {
 308                         lprintf(1, "Error configuring locale for %s: %s\n",
 309                                 buf,
 310                                 strerror(errno)
 311                         );
 312                 }
 313                 else {
 314                         lprintf(3, "Configured available locale: %s\n", buf);
 315                         AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
 316                         nLocalesLoaded++;
 317                 }
 318 #endif
 319         }
 320 }
 321
 322
 323 void ShutdownLocale(void)
 324 {
 325         int i;
 326 #ifdef HAVE_USELOCALE
 327         for (i = 0; i < nLocalesLoaded; ++i) {
 328                 if (Empty_Locale != wc_locales[i])
 329                         freelocale(wc_locales[i]);
 330         }
 331         freelocale(Empty_Locale);
 332 #endif
 333 }
 334
 335 #else   /* ENABLE_NLS */
 336 /** \brief dummy for non NLS enabled systems */
 337 void offer_languages(void) {
 338         wprintf("English (US)");
 339 }
 340
 341 /** \brief dummy for non NLS enabled systems */
 342 void set_selected_language(char *lang) {
 343 }
 344
 345 /** \brief dummy for non NLS enabled systems */
 346 void go_selected_language(void) {
 347 }
 348
 349 /** \brief dummy for non NLS enabled systems */
 350 void stop_selected_language(void) {
 351 }
 352
 353 void preset_locale(void)
 354 {
 355 }
 356 #endif  /* ENABLE_NLS */
 357
 358
 359 void TmplGettext(StrBuf *Target, int nTokens, WCTemplateToken *Token)
 360 {
 361         StrBufAppendBufPlain(Target, _(Token->Params[0]->Start), -1, 0);
 362
 363 }