st

Patched version of https://st.suckless.org/
git clone https://git.inz.fi/st/
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commit 65f1dc428315ae9d7f362e10c668557c1379e7af
parent a0467c802d4f86ed162486e3453dd61181423902
Author: jamin <acdimalev@gmail.com>
Date:   Wed, 29 Dec 2021 09:07:17 -0800

Fix overtyping wide characters.

Overtyping the first half of a wide character with the
second half of a wide character results in display garbage.
This is because the trailing dummy is not cleaned up.

i.e.  ATTR_WIDE, ATTR_WDUMMY, ATTR_WDUMMY

Here is a short script for demonstrating the behavior:

	#!/bin/sh
	alias printf=/usr/bin/printf
	printf こんにちは!; sleep 2
	printf '\x1b[5D'; sleep 2
	printf へ; sleep 2
	printf ' '; sleep 2
	echo

Diffstat:
Mst.c | 4++++
1 file changed, 4 insertions(+), 0 deletions(-)

diff --git a/st.c b/st.c @@ -2507,6 +2507,10 @@ check_control_code: if (width == 2) { gp->mode |= ATTR_WIDE; if (term.c.x+1 < term.col) { + if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) { + gp[2].u = ' '; + gp[2].mode &= ~ATTR_WDUMMY; + } gp[1].u = '\0'; gp[1].mode = ATTR_WDUMMY; }