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Do not crash when a pane offset is negative.

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This commit is contained in:
nicm
2026-05-30 09:48:30 +00:00
parent c40302a7ff
commit b9d228c72f
1 changed files with 5 additions and 3 deletions
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8
screen-write.c
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@@ -2047,8 +2047,8 @@ screen_write_collect_flush_line(struct screen_write_ctx *ctx, u_int y)
struct screen_write_citem *ci, *tmp; struct screen_write_citem *ci, *tmp;
struct screen_write_cline *cl = &s->write_list[y]; struct screen_write_cline *cl = &s->write_list[y];
u_int last = UINT_MAX, items = 0, wsx, wsy; u_int last = UINT_MAX, items = 0, wsx, wsy;
u_int w_start, w_end, w_length, i; u_int w_length, i;
int xoff, yoff, written; int w_start, w_end, xoff, yoff, written;
int r_start, r_end, c_start, c_end; int r_start, r_end, c_start, c_end;
struct tty_ctx ttyctx; struct tty_ctx ttyctx;
struct visible_ranges *r; struct visible_ranges *r;
@@ -2087,7 +2087,7 @@ screen_write_collect_flush_line(struct screen_write_ctx *ctx, u_int y)
c_start = ci->x; c_start = ci->x;
c_end = ci->x + ci->used; c_end = ci->x + ci->used;
if (c_start + xoff > r_end || c_end + xoff < r_start) if (c_start + xoff >= r_end || c_end + xoff <= r_start)
continue; continue;
if (r_start > c_start + xoff) if (r_start > c_start + xoff)
w_start = r_start - xoff; w_start = r_start - xoff;
@@ -2100,6 +2100,8 @@ screen_write_collect_flush_line(struct screen_write_ctx *ctx, u_int y)
if (w_end <= w_start) if (w_end <= w_start)
continue; continue;
w_length = w_end - w_start; w_length = w_end - w_start;
if (w_length <= 0)
continue;
screen_write_set_cursor(ctx, w_start, y); screen_write_set_cursor(ctx, w_start, y);
if (ci->type == CLEAR) { if (ci->type == CLEAR) {