Fix cursor move with wide glyphs

st would always move back 1 column,
even with wide glyhps (using more than a single column).

The glyph rune is set on its first column,
and the other ones are to 0,
so loop until we detect the start of the previous glyph.

ref.
https://git.suckless.org/st/commit/7473a8d1a57e5f9aba41b953f4e498c35e1c9dc5.html
This commit is contained in:
Bakkeby 2024-03-07 21:43:24 +01:00
parent c089485aa4
commit 400aa4492f
2 changed files with 7 additions and 3 deletions

6
st.c
View File

@ -3079,12 +3079,16 @@ tstrsequence(uchar c)
void
tcontrolcode(uchar ascii)
{
size_t i;
switch (ascii) {
case '\t': /* HT */
tputtab(1);
return;
case '\b': /* BS */
tmoveto(term.c.x-1, term.c.y);
for (i = 1; term.c.x && term.line[term.c.y][term.c.x - i].u == 0; ++i)
;
tmoveto(term.c.x - i, term.c.y);
return;
case '\r': /* CR */
tmoveto(0, term.c.y);

4
st.h
View File

@ -155,8 +155,8 @@ typedef struct {
typedef struct {
Glyph attr; /* current char attributes */
int x;
int y;
int x; /* terminal column */
int y; /* terminal row */
char state;
} TCursor;