Dear all,

I usually have a few instances of vi open next to each other (using a
window manager), and found pressing control-G all the time to understand
'what file is in what window' to be tedious. Instead, offer a configurable
option (default off) to display the file name in the lower left corner.

OK? Thoughts?

Kind regards,

Job

Index: vi/common/options.c
===================================================================
RCS file: /cvs/src/usr.bin/vi/common/options.c,v
diff -u -p -r1.29 options.c
--- vi/common/options.c	13 Apr 2021 15:39:21 -0000	1.29
+++ vi/common/options.c	12 Feb 2024 15:02:03 -0000
@@ -149,6 +149,8 @@ OPTLIST const optlist[] = {
 	{"showmatch",	NULL,		OPT_0BOOL,	0},
 /* O_SHOWMODE	  4.4BSD */
 	{"showmode",	NULL,		OPT_0BOOL,	0},
+/* O_SHOWFILENAME */
+	{"showfilename",NULL,		OPT_0BOOL,	0},
 /* O_SIDESCROLL	  4.4BSD */
 	{"sidescroll",	NULL,		OPT_NUM,	OPT_NOZERO},
 /* O_TABSTOP	    4BSD */
Index: vi/docs/USD.doc/vi.man/vi.1
===================================================================
RCS file: /cvs/src/usr.bin/vi/docs/USD.doc/vi.man/vi.1,v
diff -u -p -r1.83 vi.1
--- vi/docs/USD.doc/vi.man/vi.1	29 Jan 2023 09:28:57 -0000	1.83
+++ vi/docs/USD.doc/vi.man/vi.1	12 Feb 2024 15:02:03 -0000
@@ -2500,6 +2500,10 @@ for
 and
 .Sq )\&
 characters.
+.It Cm showfilename Bq off
+.Nm vi
+only.
+Display the file name on the colon command line.
 .It Cm showmode , smd Bq off
 .Nm vi
 only.
Index: vi/vi/vs_refresh.c
===================================================================
RCS file: /cvs/src/usr.bin/vi/vi/vs_refresh.c,v
diff -u -p -r1.22 vs_refresh.c
--- vi/vi/vs_refresh.c	30 Jan 2016 21:31:08 -0000	1.22
+++ vi/vi/vs_refresh.c	12 Feb 2024 15:02:03 -0000
@@ -810,7 +810,7 @@ vs_modeline(SCR *sp)
 
 	/* If more than one screen in the display, show the file name. */
 	curlen = 0;
-	if (IS_SPLIT(sp)) {
+	if (IS_SPLIT(sp) || O_ISSET(sp, O_SHOWFILENAME)) {
 		for (p = sp->frp->name; *p != '\0'; ++p);
 		for (ellipsis = 0, cols = sp->cols / 2; --p > sp->frp->name;) {
 			if (*p == '/') {