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(StrBuf *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         StrBuf *Buf = NULL;
  67         StrBuf *SBuf;
  68
  69         nParts=StrBufNum_tokens(LocaleString,',');
  70         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
  71         {
  72                         char sbuf[16];
  73                         char lbuf[16];
  74                         int blen;
  75
  76                         if (Buf == NULL) {
  77                                 Buf = NewStrBuf();
  78                                 SBuf = NewStrBuf();
  79                         }
  80                         else {
  81                                 FlushStrBuf(Buf);
  82                                 FlushStrBuf(SBuf);
  83                         }
  84
  85                         ls=&wanted_locales[i];
  86
  87                         StrBufExtract_token(Buf,LocaleString, i,',');
  88                         /** we are searching, if this list item has something like ;q=n*/
  89                         if (StrBufNum_tokens(Buf,'=')>1) {
  90                                 int sbuflen, k;
  91                                 StrBufExtract_token(SBuf,Buf, 1,'=');
  92                                 sbuflen=strlen(&sbuf[0]);
  93                                 for (k=0; k<sbuflen; k++) if (sbuf[k]=='.') sbuf[k]='0';
  94                                 ls->priority=atol(&sbuf[0]);
  95                         }
  96                         else {
  97                                 ls->priority=1000;
  98                         }
  99                         /** get the locale part */
 100                         StrBufExtract_token(SBuf ,Buf, 0, ';');
 101                         /** get the lang part, which should be allways there */
 102                         extract_token(&ls->lang[0], ChrPtr(SBuf), 0, '-', 16);
 103                         /** get the area code if any. */
 104                         if (StrBufNum_tokens(SBuf,'-') > 1) {
 105                                 extract_token(&ls->region[0],ChrPtr(SBuf),1,'-',16);
 106                         }
 107                         else { /** no ara code? use lang code */
 108                                 blen=strlen(&ls->lang[0]);
 109                                 memcpy(&ls->region[0], ls->lang,blen);
 110                                 ls->region[blen]='\0';
 111                         } /** area codes are uppercase */
 112                         blen=strlen(&ls->region[0]);
 113                         for (j=0; j<blen; j++)
 114                                 {
 115                                         int chars=toupper(ls->region[j]);
 116                                         ls->region[j]=(char)chars;/** \todo ?! */
 117                                 }
 118                         sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
 119
 120                         /** check if we have this lang */
 121                         ls->availability=1;
 122                         ls->selectedlang=-1;
 123                         for (j=0; j<nLocalesLoaded; j++) {
 124                                 int result;
 125                                 /** match against the LANG part */
 126                                 result=strcasecmp(&ls->lang[0], AvailLangLoaded[j]);
 127                                 if ((result<0)&&(result<ls->availability)){
 128                                         ls->availability=result;
 129                                         ls->selectedlang=j;
 130                                 }
 131                                 /** match against lang and locale */
 132                                 if (0==strcasecmp(&lbuf[0], AvailLangLoaded[j])){
 133                                         ls->availability=0;
 134                                         ls->selectedlang=j;
 135                                         j=nLocalesLoaded;
 136                                 }
 137                         }
 138         }
 139
 140         prio=0;
 141         av=-1000;
 142         nBest=-1;
 143         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++) {
 144                 ls=&wanted_locales[i];
 145                 if ((ls->availability<=0)&&
 146                    (av<ls->availability)&&
 147                    (prio<ls->priority)&&
 148                    (ls->selectedlang!=-1)) {
 149                         nBest=ls->selectedlang;
 150                         av=ls->availability;
 151                         prio=ls->priority;
 152                 }
 153         }
 154         if (nBest == -1) {
 155                 /** fall back to C */
 156                 nBest=0;
 157         }
 158         WC->selected_language=nBest;
 159         lprintf(9, "language found: %s\n", AvailLangLoaded[WC->selected_language]);
 160         FreeStrBuf(&Buf);
 161         FreeStrBuf(&SBuf);
 162 }
 163
 164 /* TODO: we skip the language weighting so far. */
 165 /* Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' */
 166 /* Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 */
 167 //void httplang_to_locale(char *LocaleString)
 168 //{
 169 //      char selected_locale[16];
 170 //      int i, j;
 171 //      char lang[64];
 172 //      int num_accept = 0;
 173 //
 174 //      lprintf(9, "languageAccept: %s\n", LocaleString);
 175 //
 176 //      strcpy(selected_locale, "C");
 177 //      num_accept = num_tokens(LocaleString, ',');
 178 //
 179 //      for (i=num_accept-1; i>=0; --i) {
 180 //              extract_token(lang, LocaleString, i, ',', sizeof lang);
 181 //
 182 //              /* Strip out the weights; we don't use them.  Also convert
 183 //               * hyphens to underscores.
 184 //               */
 185 //              for (j=0; j<strlen(lang); ++j) {
 186 //                      if (lang[j] == '-') lang[j] = '_';
 187 //                      if (lang[j] == ';') lang[j] = 0;
 188 //              }
 189 //
 190 //              for (j=0; j<NUM_LANGS; ++j) {
 191 //                      if (!strncasecmp(lang, AvailLang[j], strlen(lang))) {
 192 //                              strcpy(selected_locale, AvailLang[j]);
 193 //                      }
 194 //              }
 195 //      }
 196 //
 197 //      lprintf(9, "language found: %s\n", selected_locale);
 198 //      set_selected_language(selected_locale);
 199 //}
 200
 201
 202 /**
 203  * \brief show the language chooser on the login dialog
 204  * depending on the browser locale change the sequence of the
 205  * language chooser.
 206  */
 207 void offer_languages(StrBuf *Target, int nArgs, WCTemplateToken *Token, void *Context) {
 208         int i;
 209 #ifndef HAVE_USELOCALE
 210         char *Lang = getenv("LANG");
 211
 212         if (Lang == NULL)
 213                 Lang = "C";
 214 #endif
 215
 216         wprintf("<select name=\"language\" id=\"lname\" size=\"1\">\n");
 217
 218         for (i=0; i < nLocalesLoaded; ++i) {
 219 #ifndef HAVE_USELOCALE
 220                 if (strcmp(AvailLangLoaded[i], Lang) == 0)
 221 #endif
 222                 wprintf("<option %s value=%s>%s</option>\n",
 223                         ((WC->selected_language == i) ? "selected" : ""),
 224                         AvailLangLoaded[i],
 225                         AvailLangLoaded[i]
 226                 );
 227         }
 228
 229         wprintf("</select>\n");
 230 }
 231
 232 /**
 233  * \brief Set the selected language for this session.
 234  * \param lang the locale to set.
 235  */
 236 void set_selected_language(const char *lang) {
 237         int i;
 238
 239 #ifdef HAVE_USELOCALE
 240         for (i=0; i<nLocalesLoaded; ++i) {
 241                 if (!strcasecmp(lang, AvailLangLoaded[i])) {
 242                         WC->selected_language = i;
 243                 }
 244         }
 245 #endif
 246 }
 247
 248 /**
 249  * \brief Activate the selected language for this session.
 250  */
 251 void go_selected_language(void) {
 252 #ifdef HAVE_USELOCALE
 253         struct wcsession *WCC = WC;
 254         if (WCC->selected_language < 0) return;
 255         uselocale(wc_locales[WCC->selected_language]);  /** switch locales */
 256         textdomain(textdomain(NULL));                   /** clear the cache */
 257 #else
 258         char *language;
 259
 260         language = getenv("LANG");
 261         setlocale(LC_MESSAGES, language);
 262 #endif
 263 }
 264
 265 /**
 266  * \brief Deactivate the selected language for this session.
 267  */
 268 void stop_selected_language(void) {
 269 #ifdef HAVE_USELOCALE
 270         uselocale(LC_GLOBAL_LOCALE);                    /** switch locales */
 271         textdomain(textdomain(NULL));                   /** clear the cache */
 272 #endif
 273 }
 274
 275 void preset_locale(void)
 276 {
 277 #ifndef HAVE_USELOCALE
 278 #ifdef HAVE_GETTEXT
 279         char *language;
 280
 281         lprintf(9, "Nailing locale to %s\n", getenv("LANG"));
 282         language = getenv("LANG");
 283         setlocale(LC_MESSAGES, language);
 284 #endif
 285 #endif
 286 }
 287
 288 #ifdef HAVE_USELOCALE
 289         locale_t Empty_Locale;
 290 #endif
 291
 292 /**
 293  * \brief Create a locale_t for each available language
 294  */
 295 void initialize_locales(void) {
 296         int i;
 297         char buf[32];
 298
 299 #ifdef HAVE_USELOCALE
 300         /* create default locale */
 301         Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
 302 #endif
 303
 304         for (i = 0; i < NUM_LANGS; ++i) {
 305                 if (i == 0) {
 306                         sprintf(buf, "%s", AvailLang[i]);       // locale 0 (C) is ascii, not utf-8
 307                 }
 308                 else {
 309                         sprintf(buf, "%s.UTF8", AvailLang[i]);
 310                 }
 311 #ifdef HAVE_USELOCALE
 312                 wc_locales[nLocalesLoaded] = newlocale(
 313                         (LC_MESSAGES_MASK|LC_TIME_MASK),
 314                         buf,
 315                         (((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
 316                 );
 317                 if (wc_locales[nLocalesLoaded] == NULL) {
 318                         lprintf(1, "Error configuring locale for %s: %s\n",
 319                                 buf,
 320                                 strerror(errno)
 321                         );
 322                 }
 323                 else {
 324                         lprintf(3, "Configured available locale: %s\n", buf);
 325                         AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
 326                         nLocalesLoaded++;
 327                 }
 328 #endif
 329         }
 330 }
 331
 332
 333 void ShutdownLocale(void)
 334 {
 335         int i;
 336 #ifdef HAVE_USELOCALE
 337         for (i = 0; i < nLocalesLoaded; ++i) {
 338                 if (Empty_Locale != wc_locales[i])
 339                         freelocale(wc_locales[i]);
 340         }
 341 #endif
 342 }
 343
 344 #else   /* ENABLE_NLS */
 345 /** \brief dummy for non NLS enabled systems */
 346 void offer_languages(void) {
 347         wprintf("English (US)");
 348 }
 349
 350 /** \brief dummy for non NLS enabled systems */
 351 void set_selected_language(char *lang) {
 352 }
 353
 354 /** \brief dummy for non NLS enabled systems */
 355 void go_selected_language(void) {
 356 }
 357
 358 /** \brief dummy for non NLS enabled systems */
 359 void stop_selected_language(void) {
 360 }
 361
 362 void preset_locale(void)
 363 {
 364 }
 365 #endif  /* ENABLE_NLS */
 366
 367
 368 void TmplGettext(StrBuf *Target, int nTokens, WCTemplateToken *Token)
 369 {
 370         StrBufAppendBufPlain(Target, _(Token->Params[0]->Start), -1, 0);
 371
 372 }