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Move alternate screen into the screen rather than the pane.

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This commit is contained in:
nicm
2020-03-31 07:00:34 +00:00
parent eedf059d00
commit 3bbd66c013
7 changed files with 127 additions and 107 deletions
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84
screen.c
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@ -76,6 +76,8 @@ void
screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
{
s->grid = grid_create(sx, sy, hlimit);
s->saved_grid = NULL;
s->title = xstrdup("");
s->titles = NULL;
@ -99,6 +101,11 @@ screen_reinit(struct screen *s)
s->mode = MODE_CURSOR | MODE_WRAP;
if (s->saved_grid != NULL)
screen_alternate_off(s, NULL, 0);
s->saved_cx = UINT_MAX;
s->saved_cy = UINT_MAX;
screen_reset_tabs(s);
grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy, 8);
@ -116,6 +123,8 @@ screen_free(struct screen *s)
free(s->title);
free(s->ccolour);
if (s->saved_grid != NULL)
grid_destroy(s->saved_grid);
grid_destroy(s->grid);
screen_free_titles(s);
@ -502,3 +511,78 @@ screen_reflow(struct screen *s, u_int new_x)
log_debug("%s: reflow took %llu.%06u seconds", __func__,
(unsigned long long)tv.tv_sec, (u_int)tv.tv_usec);
}
/*
* Enter alternative screen mode. A copy of the visible screen is saved and the
* history is not updated.
*/
void
screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
{
u_int sx, sy;
if (s->saved_grid != NULL)
return;
sx = screen_size_x(s);
sy = screen_size_y(s);
s->saved_grid = grid_create(sx, sy, 0);
grid_duplicate_lines(s->saved_grid, 0, s->grid, screen_hsize(s), sy);
if (cursor) {
s->saved_cx = s->cx;
s->saved_cy = s->cy;
}
memcpy(&s->saved_cell, gc, sizeof s->saved_cell);
grid_view_clear(s->grid, 0, 0, sx, sy, 8);
s->grid->flags &= ~GRID_HISTORY;
}
/* Exit alternate screen mode and restore the copied grid. */
void
screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
{
u_int sx, sy;
/*
* Restore the cursor position and cell. This happens even if not
* currently in the alternate screen.
*/
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)
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);
/*
* Turn history back on (so resize can use it) and then resize back to
* the current size.
*/
s->grid->flags |= GRID_HISTORY;
if (sy > s->saved_grid->sy || sx != s->saved_grid->sx)
screen_resize(s, sx, sy, 1);
grid_destroy(s->saved_grid);
s->saved_grid = NULL;
}