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When a cell is cleared after having been moved, we cannot reuse its

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extended data, because that may still be in use. Add a flag to
grid_clear_cell to indicate this. Fixes irritating problems with ICH
(CSI @) mostly visible in emacs.
This commit is contained in:
nicm
2026-04-05 15:43:17 +00:00
parent 21da45e5c3
commit 4b0ff07bcb
3 changed files with 10 additions and 7 deletions
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10
grid.c
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@@ -200,7 +200,7 @@ grid_adjust_lines(struct grid *gd, u_int lines)
/* Copy default into a cell. */
static void
grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg, int moved)
{
struct grid_line *gl = &gd->linedata[py];
struct grid_cell_entry *gce = &gl->celldata[px];
@@ -209,7 +209,7 @@ grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
int had_extd = (gce->flags & GRID_FLAG_EXTENDED);
memcpy(gce, &grid_cleared_entry, sizeof *gce);
if (had_extd && old_offset < gl->extdsize) {
if (!moved && had_extd && old_offset < gl->extdsize) {
gce->flags |= GRID_FLAG_EXTENDED;
gce->offset = old_offset;
gee = grid_extended_cell(gl, gce, &grid_cleared_cell);
@@ -515,7 +515,7 @@ grid_expand_line(struct grid *gd, u_int py, u_int sx, u_int bg)
(sx - gl->cellsize) * sizeof *gl->celldata);
}
for (xx = gl->cellsize; xx < sx; xx++)
grid_clear_cell(gd, xx, py, bg);
grid_clear_cell(gd, xx, py, bg, 0);
gl->cellsize = sx;
}
@@ -683,7 +683,7 @@ grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
grid_expand_line(gd, yy, px + ox, 8); /* default bg first */
for (xx = px; xx < px + ox; xx++)
grid_clear_cell(gd, xx, yy, bg);
grid_clear_cell(gd, xx, yy, bg, 0);
}
}
@@ -777,7 +777,7 @@ grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx,
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_clear_cell(gd, xx, py, bg);
grid_clear_cell(gd, xx, py, bg, 1);
}
}