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Fix overtyping wide characters.

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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

Ref.
   - https://git.suckless.org/st/commit/65f1dc428315ae9d7f362e10c668557c1379e7af.html
This commit is contained in:
bakkeby 2022-02-24 13:27:04 +01:00
parent 1a7cc16bec
commit b5d7194d90
1 changed files with 4 additions and 0 deletions
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4
st.c
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@ -3180,6 +3180,10 @@ check_control_code:
if (width == 2) { if (width == 2) {
gp->mode |= ATTR_WIDE; gp->mode |= ATTR_WIDE;
if (term.c.x+1 < term.col) { 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].u = '\0';
gp[1].mode = ATTR_WDUMMY; gp[1].mode = ATTR_WDUMMY;
} }