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Clamp width to terminal width, also change calculation of end of screen

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(it is OK to be outside the screen). Fixes problem reported by Dane
Jensen in GitHub issue 4969.
This commit is contained in:
nicm
2026-04-04 11:20:01 +00:00
parent 6b056eb53f
commit cd60de443e
1 changed files with 10 additions and 9 deletions
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19
tty-draw.c
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@@ -143,6 +143,14 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__, px, py, nx,
atx, aty);
/* There is no point in drawing more than the end of the terminal. */
if (atx >= tty->sx)
return;
if (atx + nx >= tty->sx)
nx = tty->sx - atx;
if (nx == 0)
return;
/*
* Clamp the width to cellsize - note this is not cellused, because
* there may be empty background cells after it (from BCE).
@@ -150,15 +158,8 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
if (screen_size_x(s) > cellsize)
ex = cellsize;
else {
else
ex = screen_size_x(s);
if (px > ex)
return;
if (px + nx > ex)
nx = ex - px;
}
if (ex < nx)
ex = nx;
log_debug("%s: drawing %u-%u,%u (end %u) at %u,%u; defaults: fg=%d, "
"bg=%d", __func__, px, px + nx, py, ex, atx, aty, defaults->fg,
defaults->bg);
@@ -252,7 +253,7 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
}
/* Work out the the empty width. */
if (i >= ex)
if (px >= ex || i >= ex - px)
empty = 1;
else if (gcp->bg != last.bg)
empty = 0;