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Fix for wide character being incorrectly cleared on MODE_INSERT 

Under insert mode, when inserting a normal character in front of
a wide character, the affected region is shifted to the right by
one cell. However, the empty cell is reset as if being a part of a
wide character, causing the following cell being mishandled as a
dummy cell.
To reproduce the bug:
	printf '\033[4h' # set MODE_INSERT
	printf 妳好
	printf '\033[4D'
	printf 'x'
	printf '\033[4l\n'
This commit is contained in:
Shi Tian 2023-06-25 05:38:33 +00:00 committed by Hiltjo Posthuma
parent 211964d56e
commit 3a6d6d7401
1 changed files with 3 additions and 1 deletions
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st.c
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@ -2471,8 +2471,10 @@ check_control_code:
gp = &term.line[term.c.y][term.c.x]; gp = &term.line[term.c.y][term.c.x];
} }
if (IS_SET(MODE_INSERT) && term.c.x+width < term.col) if (IS_SET(MODE_INSERT) && term.c.x+width < term.col) {
memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph)); memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
gp->mode &= ~ATTR_WIDE;
}
if (term.c.x+width > term.col) { if (term.c.x+width > term.col) {
tnewline(1); tnewline(1);