+ if (!doExport("dvi", true)) {
+ showPrintError(absFileName());
+ dr.setMessage(_("Error exporting to DVI."));
+ break;
+ }
+
+ // Push directory path.
+ string const path = temppath();
+ // Prevent the compiler from optimizing away p
+ FileName pp(path);
+ PathChanger p(pp);
+
+ // there are three cases here:
+ // 1. we print to a file
+ // 2. we print directly to a printer
+ // 3. we print using a spool command (print to file first)
+ Systemcall one;
+ int res = 0;
+ string const dviname = changeExtension(latexName(true), "dvi");
+
+ if (target == "printer") {
+ if (!lyxrc.print_spool_command.empty()) {
+ // case 3: print using a spool
+ string const psname = changeExtension(dviname,".ps");
+ command += ' ' + lyxrc.print_to_file
+ + quoteName(psname)
+ + ' '
+ + quoteName(dviname);
+
+ string command2 = lyxrc.print_spool_command + ' ';
+ if (target_name != "default") {
+ command2 += lyxrc.print_spool_printerprefix
+ + target_name
+ + ' ';
+ }
+ command2 += quoteName(psname);
+ // First run dvips.
+ // If successful, then spool command
+ res = one.startscript(Systemcall::Wait, command);
+
+ if (res == 0) {
+ // If there's no GUI, we have to wait on this command. Otherwise,
+ // LyX deletes the temporary directory, and with it the spooled
+ // file, before it can be printed!!
+ Systemcall::Starttype stype = use_gui ?
+ Systemcall::DontWait : Systemcall::Wait;
+ res = one.startscript(stype, command2);
+ }
+ } else {
+ // case 2: print directly to a printer
+ if (target_name != "default")
+ command += ' ' + lyxrc.print_to_printer + target_name + ' ';
+ // as above....
+ Systemcall::Starttype stype = use_gui ?
+ Systemcall::DontWait : Systemcall::Wait;
+ res = one.startscript(stype, command + quoteName(dviname));
+ }
+
+ } else {
+ // case 1: print to a file
+ FileName const filename(makeAbsPath(target_name, filePath()));
+ FileName const dvifile(makeAbsPath(dviname, path));
+ if (filename.exists()) {
+ docstring text = bformat(
+ _("The file %1$s already exists.\n\n"
+ "Do you want to overwrite that file?"),
+ makeDisplayPath(filename.absFilename()));
+ if (Alert::prompt(_("Overwrite file?"),
+ text, 0, 1, _("&Overwrite"), _("&Cancel")) != 0)
+ break;
+ }
+ command += ' ' + lyxrc.print_to_file
+ + quoteName(filename.toFilesystemEncoding())
+ + ' '
+ + quoteName(dvifile.toFilesystemEncoding());
+ // as above....
+ Systemcall::Starttype stype = use_gui ?
+ Systemcall::DontWait : Systemcall::Wait;
+ res = one.startscript(stype, command);
+ }
+
+ if (res == 0)
+ dr.setError(false);
+ else {
+ dr.setMessage(_("Error running external commands."));
+ showPrintError(absFileName());
+ }
+ break;