webcit/gettext.c

   1 /*
   2  * $Id$
   3  */
   4
   5 #include "webcit.h"
   6 #include "webserver.h"
   7
   8 #ifdef ENABLE_NLS
   9 /* actual supported locales */
  10 const char *AvailLang[NUM_LANGS] = {
  11         "C",
  12         "en_US",
  13         "de_DE",
  14         "it_IT",
  15         "es_ES",
  16         "en_GB",
  17         "da_DK",
  18         "fr_FR",
  19         "nl_NL",
  20         "pt_BR"
  21 };
  22
  23 const char *AvailLangLoaded[NUM_LANGS];
  24 long nLocalesLoaded = 0;
  25
  26 #ifdef HAVE_USELOCALE
  27 locale_t wc_locales[NUM_LANGS]; /**< here we keep the parsed stuff */
  28 #endif
  29
  30 /** Keep information about one locale */
  31 typedef struct _lang_pref{
  32         char lang[16];          /**< the language locale string */
  33         char region[16];        /**< the region locale string */
  34         long priority;          /**< which priority does it have */
  35         int availability;       /**< do we know it? */
  36         int selectedlang;       /**< is this the selected language? */
  37 } LangStruct;
  38
  39 /* \brief parse browser locale header
  40  * seems as most browsers just do a one after coma value even if more than 10 locales are available. Sample strings:
  41  * opera:
  42  * 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
  43  * Firefox
  44  * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3'
  45  * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3
  46  * 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
  47  * \param LocaleString the string from the browser http headers
  48  */
  49
  50 void httplang_to_locale(StrBuf *LocaleString)
  51 {
  52         LangStruct wanted_locales[SEARCH_LANG];
  53         LangStruct *ls;
  54
  55         int i = 0;
  56         int j = 0;
  57         /* size_t len = strlen(LocaleString); */
  58         long prio;
  59         int av;
  60         int nBest;
  61         int nParts;
  62         StrBuf *Buf = NULL;
  63         StrBuf *SBuf = NULL;
  64
  65         nParts=StrBufNum_tokens(LocaleString,',');
  66         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++)
  67         {
  68                 char lbuf[16];
  69                 int blen;
  70
  71                 if (Buf == NULL) {
  72                         Buf = NewStrBuf();
  73                         SBuf = NewStrBuf();
  74                 }
  75                 else {
  76                         FlushStrBuf(Buf);
  77                         FlushStrBuf(SBuf);
  78                 }
  79
  80                 ls=&wanted_locales[i];
  81
  82                 StrBufExtract_token(Buf,LocaleString, i,',');
  83                 /** we are searching, if this list item has something like ;q=n*/
  84                 if (StrBufNum_tokens(Buf,'=')>1) {
  85                         int sbuflen, k;
  86                         StrBufExtract_token(SBuf,Buf, 1,'=');
  87                         sbuflen=StrLength(SBuf);
  88                         for (k=0; k<sbuflen; k++)
  89                                 if (ChrPtr(SBuf)[k]=='.')
  90                                         StrBufPeek(SBuf, NULL, k, '0');
  91                         ls->priority=StrTol(SBuf);
  92                 }
  93                 else {
  94                         ls->priority=1000;
  95                 }
  96                 /** get the locale part */
  97                 StrBufExtract_token(SBuf ,Buf, 0, ';');
  98                 /** get the lang part, which should be allways there */
  99                 extract_token(&ls->lang[0], ChrPtr(SBuf), 0, '-', 16);
 100                 /** get the area code if any. */
 101                 if (StrBufNum_tokens(SBuf,'-') > 1) {
 102                         extract_token(&ls->region[0],ChrPtr(SBuf),1,'-',16);
 103                 }
 104                 else { /** no ara code? use lang code */
 105                         blen=strlen(&ls->lang[0]);
 106                         memcpy(&ls->region[0], ls->lang,blen);
 107                         ls->region[blen]='\0';
 108                 } /** area codes are uppercase */
 109                 blen=strlen(&ls->region[0]);
 110                 for (j=0; j<blen; j++)
 111                 {
 112                         int chars=toupper(ls->region[j]);
 113                         ls->region[j]=(char)chars;/** \todo ?! */
 114                 }
 115                 sprintf(&lbuf[0],"%s_%s",&ls->lang[0],&ls->region[0]);
 116
 117                 /** check if we have this lang */
 118                 ls->availability=1;
 119                 ls->selectedlang=-1;
 120                 for (j=0; j<nLocalesLoaded; j++) {
 121                         int result;
 122                         /** match against the LANG part */
 123                         result=strcasecmp(&ls->lang[0], AvailLangLoaded[j]);
 124                         if ((result<0)&&(result<ls->availability)){
 125                                 ls->availability=result;
 126                                 ls->selectedlang=j;
 127                         }
 128                         /** match against lang and locale */
 129                         if (0==strcasecmp(&lbuf[0], AvailLangLoaded[j])){
 130                                 ls->availability=0;
 131                                 ls->selectedlang=j;
 132                                 j=nLocalesLoaded;
 133                         }
 134                 }
 135         }
 136
 137         prio=0;
 138         av=-1000;
 139         nBest=-1;
 140         for (i=0; ((i<nParts)&&(i<SEARCH_LANG)); i++) {
 141                 ls=&wanted_locales[i];
 142                 if ((ls->availability<=0)&&
 143                    (av<ls->availability)&&
 144                    (prio<ls->priority)&&
 145                    (ls->selectedlang!=-1)) {
 146                         nBest=ls->selectedlang;
 147                         av=ls->availability;
 148                         prio=ls->priority;
 149                 }
 150         }
 151         if (nBest == -1) {
 152                 /** fall back to C */
 153                 nBest=0;
 154         }
 155         WC->selected_language=nBest;
 156         lprintf(9, "language found: %s\n", AvailLangLoaded[WC->selected_language]);
 157         FreeStrBuf(&Buf);
 158         FreeStrBuf(&SBuf);
 159 }
 160
 161 /**
 162  * \brief show the language chooser on the login dialog
 163  * depending on the browser locale change the sequence of the
 164  * language chooser.
 165  */
 166 void tmplput_offer_languages(StrBuf *Target, WCTemplputParams *TP)
 167 {
 168         int i;
 169 #ifndef HAVE_USELOCALE
 170         char *Lang = getenv("LANG");
 171
 172         if (Lang == NULL)
 173                 Lang = "C";
 174 #endif
 175
 176         wprintf("<select name=\"language\" id=\"lname\" size=\"1\">\n");
 177
 178         for (i=0; i < nLocalesLoaded; ++i) {
 179 #ifndef HAVE_USELOCALE
 180                 if (strcmp(AvailLangLoaded[i], Lang) == 0)
 181 #endif
 182                 wprintf("<option %s value=%s>%s</option>\n",
 183                         ((WC->selected_language == i) ? "selected" : ""),
 184                         AvailLangLoaded[i],
 185                         AvailLangLoaded[i]
 186                 );
 187         }
 188
 189         wprintf("</select>\n");
 190 }
 191
 192 /**
 193  * \brief Set the selected language for this session.
 194  * \param lang the locale to set.
 195  */
 196 void set_selected_language(const char *lang) {
 197         int i;
 198
 199 #ifdef HAVE_USELOCALE
 200         for (i=0; i<nLocalesLoaded; ++i) {
 201                 if (!strcasecmp(lang, AvailLangLoaded[i])) {
 202                         WC->selected_language = i;
 203                 }
 204         }
 205 #endif
 206 }
 207
 208 /**
 209  * \brief Activate the selected language for this session.
 210  */
 211 void go_selected_language(void) {
 212 #ifdef HAVE_USELOCALE
 213         wcsession *WCC = WC;
 214         if (WCC->selected_language < 0) return;
 215         uselocale(wc_locales[WCC->selected_language]);  /** switch locales */
 216         textdomain(textdomain(NULL));                   /** clear the cache */
 217 #else
 218         char *language;
 219
 220         language = getenv("LANG");
 221         setlocale(LC_MESSAGES, language);
 222 #endif
 223 }
 224
 225 /**
 226  * \brief Deactivate the selected language for this session.
 227  */
 228 void stop_selected_language(void) {
 229 #ifdef HAVE_USELOCALE
 230         uselocale(LC_GLOBAL_LOCALE);                    /** switch locales */
 231         textdomain(textdomain(NULL));                   /** clear the cache */
 232 #endif
 233 }
 234
 235 void preset_locale(void)
 236 {
 237 #ifndef HAVE_USELOCALE
 238 #ifdef HAVE_GETTEXT
 239         char *language;
 240
 241         lprintf(9, "Nailing locale to %s\n", getenv("LANG"));
 242         language = getenv("LANG");
 243         setlocale(LC_MESSAGES, language);
 244 #endif
 245 #endif
 246 }
 247
 248 #ifdef HAVE_USELOCALE
 249         locale_t Empty_Locale;
 250 #endif
 251
 252 /**
 253  * \brief Create a locale_t for each available language
 254  */
 255 void initialize_locales(void) {
 256         int i;
 257         char buf[32];
 258
 259 #ifdef HAVE_USELOCALE
 260         /* create default locale */
 261         Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
 262 #endif
 263
 264         for (i = 0; i < NUM_LANGS; ++i) {
 265                 if (i == 0) {
 266                         sprintf(buf, "%s", AvailLang[i]);       /* locale 0 (C) is ascii, not utf-8 */
 267                 }
 268                 else {
 269                         sprintf(buf, "%s.UTF8", AvailLang[i]);
 270                 }
 271 #ifdef HAVE_USELOCALE
 272                 wc_locales[nLocalesLoaded] = newlocale(
 273                         (LC_MESSAGES_MASK|LC_TIME_MASK),
 274                         buf,
 275                         (((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
 276                 );
 277                 if (wc_locales[nLocalesLoaded] == NULL) {
 278                         lprintf(1, "Error configuring locale for %s: %s\n",
 279                                 buf,
 280                                 strerror(errno)
 281                         );
 282                 }
 283                 else {
 284                         lprintf(3, "Configured available locale: %s\n", buf);
 285                         AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
 286                         nLocalesLoaded++;
 287                 }
 288 #endif
 289         }
 290 }
 291
 292
 293 void ShutdownLocale(void)
 294 {
 295         int i;
 296 #ifdef HAVE_USELOCALE
 297         for (i = 0; i < nLocalesLoaded; ++i) {
 298                 if (Empty_Locale != wc_locales[i])
 299                         freelocale(wc_locales[i]);
 300         }
 301 #endif
 302 }
 303
 304 #else   /* ENABLE_NLS */
 305 const char *AvailLang[NUM_LANGS] = {
 306         "C"};
 307
 308 /** \brief dummy for non NLS enabled systems */
 309 void tmplput_offer_languages(StrBuf *Target, WCTemplputParams *TP)
 310 {
 311         wprintf("English (US)");
 312 }
 313
 314 /** \brief dummy for non NLS enabled systems */
 315 void set_selected_language(char *lang) {
 316 }
 317
 318 /** \brief dummy for non NLS enabled systems */
 319 void go_selected_language(void) {
 320 }
 321
 322 /** \brief dummy for non NLS enabled systems */
 323 void stop_selected_language(void) {
 324 }
 325
 326 void preset_locale(void)
 327 {
 328 }
 329 #endif  /* ENABLE_NLS */
 330
 331
 332 void TmplGettext(StrBuf *Target, WCTemplputParams *TP)
 333 {
 334         StrBufAppendBufPlain(Target, _(TP->Tokens->Params[0]->Start), -1, 0);
 335 }
 336
 337
 338 /*
 339  * Returns the language currently in use.
 340  * This function returns a static string, so don't do anything stupid please.
 341  */
 342 const char *get_selected_language(void) {
 343 #ifdef ENABLE_NLS
 344 #ifdef HAVE_USELOCALE
 345         return AvailLang[WC->selected_language];
 346 #else
 347         return "en"
 348 #endif
 349 #else
 350         return "en"
 351 #endif
 352 }
 353
 354 void
 355 InitModule_GETTEXT
 356 (void)
 357 {
 358         RegisterNamespace("LANG:SELECT", 0, 0, tmplput_offer_languages, CTX_NONE);
 359 }