+void writeString(docstring const & s, WriteStream & os)
+{
+ if (!os.latex() || os.lockedMode()) {
+ os << (os.asciiOnly() ? escape(s) : s);
+ return;
+ }
+
+ docstring::const_iterator cit = s.begin();
+ docstring::const_iterator end = s.end();
+
+ // We may already be inside an \ensuremath command.
+ bool in_forced_mode = os.pendingBrace();
+
+ // We will take care of matching braces.
+ os.pendingBrace(false);
+
+ while (cit != end) {
+ bool mathmode = in_forced_mode ? os.textMode() : !os.textMode();
+ char_type const c = *cit;
+ docstring command(1, c);
+ try {
+ bool termination = false;
+ if (isASCII(c) ||
+ Encodings::latexMathChar(c, mathmode, os.encoding(), command, termination)) {
+ if (os.textMode()) {
+ if (in_forced_mode) {
+ // we were inside \lyxmathsym
+ os << '}';
+ os.textMode(false);
+ in_forced_mode = false;
+ }
+ if (!isASCII(c) && os.textMode()) {
+ os << "\\ensuremath{";
+ os.textMode(false);
+ in_forced_mode = true;
+ }
+ } else if (isASCII(c) && in_forced_mode) {
+ // we were inside \ensuremath
+ os << '}';
+ os.textMode(true);
+ in_forced_mode = false;
+ }
+ } else if (!os.textMode()) {
+ if (in_forced_mode) {
+ // we were inside \ensuremath
+ os << '}';
+ in_forced_mode = false;
+ } else {
+ os << "\\lyxmathsym{";
+ in_forced_mode = true;
+ }
+ os.textMode(true);
+ }
+ os << command;
+ // We may need a space if the command contains a macro
+ // and the last char is ASCII.
+ if (termination)
+ os.pendingSpace(true);
+ } catch (EncodingException const & e) {
+ switch (os.output()) {
+ case WriteStream::wsDryrun: {
+ os << "<" << _("LyX Warning: ")
+ << _("uncodable character") << " '";
+ os << docstring(1, e.failed_char);
+ os << "'>";
+ break;
+ }
+ case WriteStream::wsPreview: {
+ // indicate the encoding error by a boxed '?'
+ os << "{\\fboxsep=1pt\\fbox{?}}";
+ LYXERR0("Uncodable character" << " '"
+ << docstring(1, e.failed_char)
+ << "'");
+ break;
+ }
+ case WriteStream::wsDefault:
+ default:
+ // throw again
+ throw(e);
+ }
+ }
+ ++cit;
+ }
+
+ if (in_forced_mode && os.textMode()) {
+ // We have to care for closing \lyxmathsym
+ os << '}';
+ os.textMode(false);
+ } else {
+ os.pendingBrace(in_forced_mode);
+ }
+}
+
+