X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=webcit%2Fgettext.c;fp=webcit%2Fgettext.c;h=1bc40c8f40a5dbe18f08331d85dd8a8ccf46578f;hb=8611acef7ff4213c28ad20ff755d34509870bc96;hp=0000000000000000000000000000000000000000;hpb=76a0f8571de023fe6bd20390174a2302e0a0b982;p=citadel.git

diff --git a/webcit/gettext.c b/webcit/gettext.c
new file mode 100644
index 000000000..1bc40c8f4
--- /dev/null
+++ b/webcit/gettext.c
@@ -0,0 +1,515 @@
+/*
+ * Copyright (c) 1996-2012 by the citadel.org team
+ *
+ * This program is open source software.  You can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "webcit.h"
+#include "webserver.h"
+#define SEARCH_LANG 20		/* how many langs should we parse? */
+
+#ifdef ENABLE_NLS
+/* actual supported locales */
+const char *AvailLang[] = {
+	"en_US",
+	"ar_AE",
+	"bg_BG",
+	"cs_CZ",
+	"en_US",
+	"da_DK",
+	"de_DE",
+	"el_GR",
+	"en_GB",
+	"es_ES",
+	"et_EE",
+	"fi_FI",
+	"fr_FR",
+	"hu_HU",
+	"it_IT",
+	"ko_KO",
+	"nl_NL",
+	"pl_PL",
+	"pt_BR",
+	"ru_RU",
+	"zh_CN",
+ 	"he_IL",
+	"kk_KK",
+	"ro_RO",
+	"sl_SL",
+	"tr_TR",
+	""
+};
+
+const char **AvailLangLoaded;
+long nLocalesLoaded = 0;
+
+#ifdef HAVE_USELOCALE
+locale_t *wc_locales; /* here we keep the parsed stuff */
+#endif
+
+/* Keep information about one locale */
+typedef struct _lang_pref {
+	char lang[16];          /* the language locale string */
+	char region[16];        /* the region locale string */
+	long priority;          /* which priority does it have */
+	int availability;       /* do we know it? */
+	int selectedlang;       /* is this the selected language? */
+} LangStruct;
+
+/* parse browser locale header 
+ *
+ * seems as most browsers just do a one after comma value even if more than 10 locales are available. Sample strings:
+ * opera: 
+ * 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 
+ * Firefox 
+ * Accept-Language: 'de-de,en-us;q=0.7,en;q=0.3' 
+ * Accept-Language: de,en-ph;q=0.8,en-us;q=0.5,de-at;q=0.3 
+ * 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 
+ */
+
+void httplang_to_locale(StrBuf *LocaleString, wcsession *sess)
+{
+	LangStruct wanted_locales[SEARCH_LANG];
+	LangStruct *ls;
+
+	long len;
+	int i = 0;
+	int j = 0;
+	/* size_t len = strlen(LocaleString); */
+	long prio;
+	int av;
+	int nBest;
+	int nParts;
+	StrBuf *Buf = NULL;
+	StrBuf *SBuf = NULL;
+
+	nParts = StrBufNum_tokens(LocaleString, ',');
+	for (i=0; ((i<nParts) && (i < SEARCH_LANG)); i++)
+        {
+		char lbuf[32];
+		int blen;
+			
+		if (Buf == NULL) {
+			Buf = NewStrBuf();
+			SBuf = NewStrBuf();
+		}
+		else {
+			FlushStrBuf(Buf);
+			FlushStrBuf(SBuf);
+		}
+
+		ls = &wanted_locales[i];
+
+		StrBufExtract_token(Buf, LocaleString, i, ',');
+		/* we are searching, if this list item has something like ;q=n*/
+		if (StrBufNum_tokens(Buf, '=') > 1) {
+			int sbuflen, k;
+			StrBufExtract_token(SBuf, Buf, 1, '=');
+			sbuflen = StrLength(SBuf);
+			for (k = 0; k < sbuflen; k++) {
+				if (ChrPtr(SBuf)[k] == '.') {
+					StrBufPeek(SBuf, NULL, k, '0');
+				}
+			}
+			ls->priority = StrTol(SBuf);
+		}
+		else {
+			ls->priority = 1000;
+		}
+
+		/* get the locale part */
+		StrBufExtract_token(SBuf, Buf, 0, ';');
+
+		/* get the lang part, which should be allways there */
+		extract_token(ls->lang, 
+			      ChrPtr(SBuf), 
+			      0, '-', 
+			      sizeof(ls->lang));
+
+		/* get the area code if any. */
+		if (StrBufNum_tokens(SBuf, '-') > 1) {
+			extract_token(ls->region, 
+				      ChrPtr(SBuf), 
+				      1, '-', 
+				      sizeof(ls->region)
+			);
+		}
+		else { /* no ara code? use lang code */
+			blen = strlen(ls->lang);
+			memcpy(ls->region, ls->lang, blen);
+			ls->region[blen] = '\0';
+		}
+
+		/* area codes are uppercase */
+		blen = strlen(&ls->region[0]);
+		for (j = 0; j < blen; j++)
+		{
+			int chars;
+			chars = toupper(ls->region[j]);
+			ls->region[j] = (char)chars; /* todo ? */
+		}
+		snprintf(lbuf,
+			 sizeof(lbuf), 
+			 "%s_%s", 
+			 ls->lang, 
+			 ls->region);
+			
+		/* check if we have this lang */
+		ls->availability = 1;
+		ls->selectedlang = -1;
+		len = strlen(ls->lang);
+		for (j = 0; j < nLocalesLoaded; j++) {
+			int result;
+			/* match against the LANG part */
+			result = strncasecmp(ls->lang, AvailLangLoaded[j], len);
+			if ((result == 0) && (result < ls->availability)){
+				ls->availability = result;
+				ls->selectedlang = j;
+			}
+			/* match against lang and locale */
+			if (0 == strcasecmp(lbuf, AvailLangLoaded[j])){
+				ls->availability = 0;
+				ls->selectedlang = j;
+				j = nLocalesLoaded;
+			}
+		}
+        }
+	
+	prio = 0;
+	av = -1000;
+	nBest = -1;
+	for (i = 0; ((i < nParts) && (i<SEARCH_LANG)); i++) {
+		ls = &wanted_locales[i];
+		if (	(ls->availability <= 0)
+			&& (av < ls->availability)
+			&& (prio < ls->priority)
+			&& (ls->selectedlang != -1)
+		) {
+			nBest = ls->selectedlang;
+			av = ls->availability;
+			prio = ls->priority;
+		}
+	}
+	if (nBest == -1) {
+		/* fall back to C */
+		nBest=0;
+	}
+	sess->selected_language = nBest;
+	syslog(LOG_DEBUG, "language found: %s", AvailLangLoaded[sess->selected_language]);
+	FreeStrBuf(&Buf);
+	FreeStrBuf(&SBuf);
+}
+
+
+/*
+ * show the language chooser on the login dialog
+ * depending on the browser locale change the sequence of the 
+ * language chooser.
+ */
+void tmplput_offer_languages(StrBuf *Target, WCTemplputParams *TP)
+{
+	int i;
+#ifndef HAVE_USELOCALE
+	char *Lang = getenv("LANG");
+	
+	if (Lang == NULL)
+		Lang = "C";
+#endif
+
+	if (nLocalesLoaded == 1) {
+		wc_printf("<p>%s</p>", AvailLangLoaded[0]);
+		return;
+	}
+
+	wc_printf("<select name=\"language\" id=\"lname\" size=\"1\" onChange=\"switch_to_lang($('lname').value);\">\n");
+
+	for (i=0; i < nLocalesLoaded; ++i) {
+#ifndef HAVE_USELOCALE
+		if (strcmp(AvailLangLoaded[i], Lang) == 0)
+#endif
+		wc_printf("<option %s value=%s>%s</option>\n",
+			((WC->selected_language == i) ? "selected" : ""),
+			AvailLangLoaded[i],
+			AvailLangLoaded[i]
+		);
+	}
+
+	wc_printf("</select>\n");
+}
+
+/*
+ * Set the selected language for this session.
+ */
+void set_selected_language(const char *lang) {
+#ifdef HAVE_USELOCALE
+	int i;
+	for (i = 0; i<nLocalesLoaded; ++i) {
+		if (!strcasecmp(lang, AvailLangLoaded[i])) {
+			WC->selected_language = i;
+			break;
+		}
+	}
+#endif
+}
+
+/*
+ * Activate the selected language for this session.
+ */
+void go_selected_language(void) {
+#ifdef HAVE_USELOCALE
+	wcsession *WCC = WC;
+	if (WCC->selected_language < 0)
+	{
+		httplang_to_locale(WCC->Hdr->HR.browser_language, WCC);
+		if (WCC->selected_language < 0)
+			return;
+	}
+	uselocale(wc_locales[WCC->selected_language]);	/* switch locales */
+	textdomain(textdomain(NULL));			/* clear the cache */
+#else
+	char *language;
+	
+	language = getenv("LANG");
+	setlocale(LC_MESSAGES, language);
+#endif
+}
+
+/*
+ * Deactivate the selected language for this session.
+ */
+void stop_selected_language(void) {
+#ifdef HAVE_USELOCALE
+	uselocale(LC_GLOBAL_LOCALE);			/* switch locales */
+	textdomain(textdomain(NULL));			/* clear the cache */
+#endif
+}
+
+#ifdef HAVE_USELOCALE
+	locale_t Empty_Locale;
+#endif
+
+/*
+ * Create a locale_t for each available language
+ */
+void initialize_locales(void) {
+	int nLocales;
+	int i;
+	char buf[32];
+	char *language = NULL;
+
+	nLocales = 0; 
+	while (!IsEmptyStr(AvailLang[nLocales]))
+		nLocales++;
+
+	language = getenv("WEBCIT_LANG");
+	if ((language) && (!IsEmptyStr(language)) && (strcmp(language, "UNLIMITED") != 0)) {
+		syslog(LOG_INFO, "Nailing locale to %s", language);
+ 	}
+	else language = NULL;
+
+	AvailLangLoaded = malloc (sizeof(char*) * nLocales);
+	memset(AvailLangLoaded, 0, sizeof(char*) * nLocales);
+#ifdef HAVE_USELOCALE
+	wc_locales = malloc (sizeof(locale_t) * nLocales);
+	memset(wc_locales,0, sizeof(locale_t) * nLocales);
+	/* create default locale */
+	Empty_Locale = newlocale(LC_ALL_MASK, NULL, NULL);
+#endif
+
+	for (i = 0; i < nLocales; ++i) {
+		if ((language != NULL) && (strcmp(AvailLang[i], language) != 0))
+			continue;
+		if (i == 0) {
+			sprintf(buf, "C");	/* locale 0 (C) is ascii, not utf-8 */
+			
+		}
+		else {
+			sprintf(buf, "%s.UTF8", AvailLang[i]);
+		}
+#ifdef HAVE_USELOCALE
+		wc_locales[nLocalesLoaded] = newlocale(
+			(LC_MESSAGES_MASK|LC_TIME_MASK),
+			buf,
+			(((i > 0) && (wc_locales[0] != NULL)) ? wc_locales[0] : Empty_Locale)
+		);
+		if (wc_locales[nLocalesLoaded] == NULL) {
+			syslog(LOG_NOTICE, "locale for %s disabled: %s", buf, strerror(errno));
+		}
+		else {
+			syslog(LOG_INFO, "Found locale: %s - %s", buf, AvailLang[i]);
+			AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
+			nLocalesLoaded++;
+		}
+#else
+		if ((language != NULL) && (strcmp(language, AvailLang[i]) == 0)) {
+			setenv("LANG", buf, 1);
+			AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
+			setlocale(LC_MESSAGES, AvailLang[i]);
+			nLocalesLoaded++;
+		}
+		else if (nLocalesLoaded == 0) {
+			setenv("LANG", buf, 1);
+			AvailLangLoaded[nLocalesLoaded] = AvailLang[i];
+			nLocalesLoaded++;
+		}
+#endif
+	}
+	if ((language != NULL) && (nLocalesLoaded == 0)) {
+		syslog(LOG_WARNING, "Your selected locale [%s] isn't available on your system. falling back to C", language);
+#ifdef HAVE_USELOCALE
+		wc_locales[0] = newlocale(
+			(LC_MESSAGES_MASK|LC_TIME_MASK),
+			AvailLang[0],
+			Empty_Locale
+		);
+#else
+		setlocale(LC_MESSAGES, AvailLang[0]);
+		setenv("LANG", AvailLang[0], 1);
+#endif
+		AvailLangLoaded[0] = AvailLang[0];
+		nLocalesLoaded = 1;
+	}
+
+#ifdef ENABLE_NLS
+	setlocale(LC_ALL, "");
+	syslog(LOG_DEBUG, "Text domain: %s", textdomain("webcit"));
+	syslog(LOG_DEBUG, "Text domain Charset: %s", bind_textdomain_codeset("webcit", "UTF8"));
+	syslog(LOG_DEBUG, "Message catalog directory: %s", bindtextdomain(textdomain(NULL), LOCALEDIR"/locale"));
+#endif
+}
+
+
+void 
+ServerShutdownModule_GETTEXT
+(void)
+{
+#ifdef HAVE_USELOCALE
+	int i;
+	for (i = 0; i < nLocalesLoaded; ++i) {
+		if (Empty_Locale != wc_locales[i]) {
+			freelocale(wc_locales[i]);
+		}
+	}
+	free(wc_locales);
+#endif
+	free(AvailLangLoaded);
+}
+
+#else	/* ENABLE_NLS */
+const char *AvailLang[] = {
+	"C",
+	""
+};
+
+/* dummy for non NLS enabled systems */
+void 
+ServerShutdownModule_GETTEXT
+(void)
+{
+}
+
+
+void tmplput_offer_languages(StrBuf *Target, WCTemplputParams *TP)
+{
+	wc_printf("English (US)");
+}
+
+/* dummy for non NLS enabled systems */
+void set_selected_language(const char *lang) {
+}
+
+/* dummy for non NLS enabled systems */
+void go_selected_language(void) {
+}
+
+/* dummy for non NLS enabled systems */
+void stop_selected_language(void) {
+}
+
+void initialize_locales(void) {
+}
+
+#endif	/* ENABLE_NLS */
+
+void TmplGettext(StrBuf *Target, WCTemplputParams *TP)
+{
+	const char *Text = _(TP->Tokens->Params[0]->Start);
+
+	StrBufAppendTemplateStr(Target, TP, Text, 1);
+}
+
+
+/*
+ * Returns the language currently in use.
+ * This function returns a static string, so don't do anything stupid please.
+ */
+const char *get_selected_language(void) {
+#ifdef ENABLE_NLS
+#ifdef HAVE_USELOCALE
+	return AvailLangLoaded[WC->selected_language];
+#else
+	return "en";
+#endif
+#else
+	return "en";
+#endif
+}
+
+
+void Header_HandleAcceptLanguage(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+	hdr->HR.browser_language = Line;
+}
+
+
+void 
+InitModule_GETTEXT
+(void)
+{
+	initialize_locales();
+	
+	RegisterHeaderHandler(HKEY("ACCEPT-LANGUAGE"), 
+			      Header_HandleAcceptLanguage);
+			      
+	RegisterNamespace("LANG:SELECT", 0, 0, 
+			  tmplput_offer_languages, NULL, CTX_NONE);
+}
+
+
+void
+SessionNewModule_GETTEXT
+(wcsession *sess)
+{
+#ifdef ENABLE_NLS
+	if (	(sess != NULL)
+		&& (!sess->Hdr->HR.Static)
+		&& (sess->Hdr->HR.browser_language != NULL)
+	) {
+		httplang_to_locale(sess->Hdr->HR.browser_language, sess);
+	}
+#endif
+}
+
+void
+SessionAttachModule_GETTEXT
+(wcsession *sess)
+{
+#ifdef ENABLE_NLS
+	go_selected_language();					/* set locale */
+#endif
+}
+
+void 
+SessionDestroyModule_GETTEXT
+(wcsession *sess)
+{
+#ifdef ENABLE_NLS
+	stop_selected_language();				/* unset locale */
+#endif
+}