From a429e2bf23a4584f50df7d92b724fc34828deff9 Mon Sep 17 00:00:00 2001
From: Emanuele Giaquinta <exg@irssi.org>
Date: Fri, 25 May 2007 22:06:32 +0000
Subject: [PATCH] Forbid insertion of a character with width 0 as the first
 character in the prompt.

git-svn-id: http://svn.irssi.org/repos/irssi/trunk@4519 dbcabf3a-b0e7-0310-adc4-f8d773084564
---
 src/fe-text/gui-entry.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/fe-text/gui-entry.c b/src/fe-text/gui-entry.c
index 4ffae832..be778224 100644
--- a/src/fe-text/gui-entry.c
+++ b/src/fe-text/gui-entry.c
@@ -460,6 +460,9 @@ void gui_entry_insert_char(GUI_ENTRY_REC *entry, unichar chr)
 	if (chr == 0 || chr == 13 || chr == 10)
 		return; /* never insert NUL, CR or LF characters */
 
+	if (entry->utf8 && entry->pos == 0 && mk_wcwidth(chr) == 0)
+		return;
+
         gui_entry_redraw_from(entry, entry->pos);
 
 	entry_text_grow(entry, 1);