Hi,
here are two very simple fixes for ksh(1) emacs input mode.
The first hunk lets you insert non-ASCII UTF-8 characters without
screwing up the display. Specifically, after inserting a continuation
byte, it backs up to the start byte and starts re-printing there.
The second hunk fixes forward movement which i didn't get quite
right in my previous commit (backward movement is already fine).
Always advance to a start byte, never to a final continuation byte.
Without it, if you move forward onto a multi-byte character and
then insert something, the something splits the UTF-8 character
in the middle. Ooops.
OK?
Ingo
Index: emacs.c
===================================================================
RCS file: /cvs/src/bin/ksh/emacs.c,v
retrieving revision 1.61
diff -u -p -r1.61 emacs.c
--- emacs.c 10 Dec 2015 10:00:14 -0000 1.61
+++ emacs.c 5 Jan 2016 18:25:26 -0000
@@ -681,6 +681,11 @@ x_zots(char *str)
{
int adj = x_adj_done;
+ if (str > xbuf && isu8cont(*str)) {
+ while (str > xbuf && isu8cont(*str))
+ str--;
+ x_e_putc('\b');
+ }
x_lastcp();
while (*str && str < xlp && adj == x_adj_done)
x_zotc(*str++);
@@ -727,7 +732,7 @@ x_mv_forw(int c)
}
if (x_arg > nleft)
x_arg = nleft;
- while (x_arg < nleft && isu8cont(xcp[x_arg + 1]))
+ while (x_arg < nleft && isu8cont(xcp[x_arg]))
x_arg++;
x_goto(xcp + x_arg);
return KSTD;
