From 9b2ea0151510d610bcd3e4cdf01a10e4f241a680 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 12 Nov 2022 12:26:28 +0100
Subject: Only accept keys that can actually match an existing hint.

Not arbitrary keys from hintchars.

Avoids unnecessary backspacing on typos.
---
 reselect | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/reselect b/reselect
index 073f6d7..60f2571 100644
--- a/reselect
+++ b/reselect
@@ -201,7 +201,9 @@ sub on_key_press {
                 my $match = $results->{$num}->{match};
                 $self->launch($match);
             }
-        } elsif (grep { $_ eq $keyname } @hintchars) {
+        } elsif (length($keyname) == 1 &&
+                 grep { index($_, $p->{buffer} . $keyname) == 0} keys %{$p->{results}}) {
+            # accept key only if the new buffer is a prefix of at least one hint
             $p->{buffer} = $p->{buffer} . $keyname;
             $self->update($p);
         }
-- 
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