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Always resize the original screen before copying when exiting the

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alternate screen, GitHub issue 2536.
This commit is contained in:
nicm 2021-01-26 09:32:52 +00:00
parent 9fcf413d87
commit d6542c333d
1 changed files with 23 additions and 18 deletions
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41
screen.c
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@ -574,7 +574,14 @@ screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
void
screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
{
u_int sx, sy;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
/*
* If the current size is different, temporarily resize to the old size
* before copying back.
*/
if (s->saved_grid != NULL)
screen_resize(s, s->saved_grid->sx, s->saved_grid->sy, 1);
/*
* Restore the cursor position and cell. This happens even if not
@ -582,29 +589,23 @@ screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
*/
if (cursor && s->saved_cx != UINT_MAX && s->saved_cy != UINT_MAX) {
s->cx = s->saved_cx;
if (s->cx > screen_size_x(s) - 1)
s->cx = screen_size_x(s) - 1;
s->cy = s->saved_cy;
if (s->cy > screen_size_y(s) - 1)
s->cy = screen_size_y(s) - 1;
if (gc != NULL)
memcpy(gc, &s->saved_cell, sizeof *gc);
}
if (s->saved_grid == NULL)
/* If not in the alternate screen, do nothing more. */
if (s->saved_grid == NULL) {
if (s->cx > screen_size_x(s) - 1)
s->cx = screen_size_x(s) - 1;
if (s->cy > screen_size_y(s) - 1)
s->cy = screen_size_y(s) - 1;
return;
sx = screen_size_x(s);
sy = screen_size_y(s);
/*
* If the current size is bigger, temporarily resize to the old size
* before copying back.
*/
if (sy > s->saved_grid->sy)
screen_resize(s, sx, s->saved_grid->sy, 1);
}
/* Restore the saved grid. */
grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0, sy);
grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
s->saved_grid->sy);
/*
* Turn history back on (so resize can use it) and then resize back to
@ -612,9 +613,13 @@ screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
*/
if (s->saved_flags & GRID_HISTORY)
s->grid->flags |= GRID_HISTORY;
if (sy > s->saved_grid->sy || sx != s->saved_grid->sx)
screen_resize(s, sx, sy, 1);
screen_resize(s, sx, sy, 1);
grid_destroy(s->saved_grid);
s->saved_grid = NULL;
if (s->cx > screen_size_x(s) - 1)
s->cx = screen_size_x(s) - 1;
if (s->cy > screen_size_y(s) - 1)
s->cy = screen_size_y(s) - 1;
}