From e71e7f5cf6452e9f14dd93a72ed9afca98ea13b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Fri, 31 Mar 2023 11:34:04 +0200
Subject: [PATCH] =?UTF-8?q?input:=20kitty:=20don=E2=80=99t=20treat=20zero-?=
 =?UTF-8?q?length=20utf8/utf32=20strings=20as=20text?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is a regression introduced in 3215d54f31c9e339598a34c9fa43f3dc3c5d1e42

Symptoms: e.g. arrow keys not working in vim/neovim
---
 input.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/input.c b/input.c
index b7f25670..7e5d204d 100644
--- a/input.c
+++ b/input.c
@@ -1125,7 +1125,7 @@ kitty_kbd_protocol(struct seat *seat, struct terminal *term,
     const uint8_t *const utf8 = ctx->utf8.buf;
     const size_t count = ctx->utf8.count;
 
-    bool is_text = utf32 != NULL && (effective & ~caps_num) == 0;
+    bool is_text = count > 0 && utf32 != NULL && (effective & ~caps_num) == 0;
     for (size_t i = 0; utf32[i] != U'\0'; i++) {
         if (!iswprint(utf32[i])) {
             is_text = false;