Markus Kuhn's UTF-8 page

http://www.cl.cam.ac.uk/~mgk25/unicode.html#activate
feels strongly that it should be easy to make _all_ your
applications work in UTF-8 mode, without having to remember a switch
for each one. Every application should simply note a UTF-8 locale
setting and switch into UTF-8 mode automatically.

Therefore, for the Unix port only, there's now a checkbox, enabled
by default, which causes the drop-down Translation box to be
overridden if the locale indicates UTF-8. Anyone who doesn't like
this, or doesn't like MGK, is welcome to turn it straight back off.

I'm not _completely_ convinced by MGK's argument myself; for
xterm/pterm to do _useful_ UTF-8 you also need to specify a decently
Unicode-capable font, and there's no way _that_ can be automagically
done on noticing a locale setting. But it's a de facto standard
(i.e. xterm does it :-) so I might as well at least be _able_ to
support it.

[originally from svn r4648]

unix/uxcfg.c

@@ -129,6 +129,21 @@ void unix_setup_config_box(struct controlbox *b, int midsession, void *win)
 		 HELPCTX(no_help), dlg_stdeditbox_handler,
                  I(offsetof(Config,shadowboldoffset)), I(-1));
 
+    /*
+     * Markus Kuhn feels, not totally unreasonably, that it's good
+     * for all applications to shift into UTF-8 mode if they notice
+     * that they've been started with a LANG setting dictating it,
+     * so that people don't have to keep remembering a separate
+     * UTF-8 option for every application they use. Therefore,
+     * here's an override option in the Translation panel.
+     */
+    s = ctrl_getset(b, "Window/Translation", "trans",
+		    "Character set translation on received data");
+    ctrl_checkbox(s, "Override with UTF-8 if locale says so", 'l',
+		  HELPCTX(translation_utf8_override),
+		  dlg_stdcheckbox_handler,
+		  I(offsetof(Config,utf8_override)));
+
     /*
      * Unix supports a local-command proxy. This also means we must
      * adjust the text on the `Telnet command' control.