+
+
+docstring const i18npreamble(docstring const & templ, Language const * lang,
+ Encoding const & enc, bool const polyglossia)
+{
+ if (templ.empty())
+ return templ;
+
+ string preamble = polyglossia ?
+ subst(to_utf8(templ), "$$lang", lang->polyglossia()) :
+ subst(to_utf8(templ), "$$lang", lang->babel());
+
+ string const langenc = lang->encoding()->iconvName();
+ string const texenc = lang->encoding()->latexName();
+ string const bufenc = enc.iconvName();
+ // First and second character of plane 15 (Private Use Area)
+ string const s1 = "\xf3\xb0\x80\x80"; // U+F0000
+ string const s2 = "\xf3\xb0\x80\x81"; // U+F0001
+ // FIXME UNICODE
+ // lyx::regex is not unicode-safe.
+ // Should use QRegExp or (boost::u32regex, but that requires ICU)
+ static regex const reg("_\\(([^\\)]+)\\)");
+ smatch sub;
+ while (regex_search(preamble, sub, reg)) {
+ string const key = sub.str(1);
+ docstring const name = lang->translateLayout(key);
+ // Check whether name can be encoded in the buffer encoding
+ bool encodable = true;
+ for (size_t i = 0; i < name.size(); ++i) {
+ if (!enc.encodable(name[i])) {
+ encodable = false;
+ break;
+ }
+ }
+ string const translated = encodable ? to_utf8(name)
+ : "\\inputencoding{" + texenc + "}"
+ + s1 + langenc + s2 + to_utf8(name)
+ + s1 + bufenc + s2;
+ preamble = subst(preamble, sub.str(), translated);
+ }
+ return from_utf8(preamble);
+}
+