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diff --git a/dmenu.1 b/dmenu.1
index 9eab758..61084ab 100644
--- a/dmenu.1
+++ b/dmenu.1
@@ -3,7 +3,7 @@
dmenu \- dynamic menu
.SH SYNOPSIS
.B dmenu
-.RB [ \-bfiv ]
+.RB [ \-bfirv ]
.RB [ \-l
.IR lines ]
.RB [ \-m
@@ -47,6 +47,9 @@ X until stdin reaches end\-of\-file.
.B \-i
dmenu matches menu items case insensitively.
.TP
+.B \-r
+dmenu will reject any input which would result in no matching option left.
+.TP
.BI \-l " lines"
dmenu lists items vertically, with the given number of lines.
.TP
diff --git a/dmenu.c b/dmenu.c
index d605ab4..7505278 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -38,6 +38,7 @@ static char *embed;
static int bh, mw, mh;
static int inputw = 0, promptw;
static int lrpad; /* sum of left and right padding */
+static int reject_no_match = 0;
static size_t cursor;
static struct item *items = NULL;
static struct item *matches, *matchend;
@@ -268,12 +269,26 @@ insert(const char *str, ssize_t n)
{
if (strlen(text) + n > sizeof text - 1)
return;
+
+ static char last[BUFSIZ] = "";
+ if(reject_no_match) {
+ /* store last text value in case we need to revert it */
+ memcpy(last, text, BUFSIZ);
+ }
+
/* move existing text out of the way, insert new text, and update cursor */
memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
if (n > 0)
memcpy(&text[cursor], str, n);
cursor += n;
match();
+
+ if(!matches && reject_no_match) {
+ /* revert to last text value if theres no match */
+ memcpy(text, last, BUFSIZ);
+ cursor -= n;
+ match();
+ }
}
static size_t
@@ -636,7 +651,7 @@ setup(void)
static void
usage(void)
{
- fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
+ fputs("usage: dmenu [-bfirv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
" [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
exit(1);
}
@@ -659,7 +674,9 @@ main(int argc, char *argv[])
else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
fstrncmp = strncasecmp;
fstrstr = cistrstr;
- } else if (i + 1 == argc)
+ } else if (!strcmp(argv[i], "-r")) /* reject input which results in no match */
+ reject_no_match = 1;
+ else if (i + 1 == argc)
usage();
/* these options take one argument */
else if (!strcmp(argv[i], "-l")) /* number of lines in vertical list */
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