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csi: add support for ?1047 and ?1048

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* 1047 enters/leaves the alt screen, but without saving/restoring the
  cursor.
* 1048 saves/restores the cursor
* 1049 is 1047+1048

Note: when xtsaving and xtrestoring 1048, why simply save/restore the
cursor. Without having read XTerms sources, this appears to be what it
is doing.
This commit is contained in:
Daniel Eklöf 2021-01-15 17:09:15 +01:00
parent bae3c871bb
commit a63e7983dd
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GPG key ID: 5BBD4992C116573F
1 changed files with 27 additions and 8 deletions
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35
csi.c
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@ -489,19 +489,31 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
break;
#endif
case 1048:
if (enable)
term_save_cursor(term);
else
term_restore_cursor(term, &term->grid->saved_cursor);
break;
case 1047:
case 1049:
if (enable && term->grid != &term->alt) {
selection_cancel(term);
if (param == 1049)
term_save_cursor(term);
term->grid = &term->alt;
/* Cursor retains its position from the normal grid */
/* TODO: don’t need separate cursors */
term_cursor_to(
term,
min(term->grid->cursor.point.row, term->rows - 1),
min(term->grid->cursor.point.col, term->cols - 1));
tll_free(term->alt.scroll_damage);
min(term->normal.cursor.point.row, term->rows - 1),
min(term->normal.cursor.point.col, term->cols - 1));
tll_free(term->normal.scroll_damage);
term_erase(
term,
&(struct coord){0, 0},
@ -513,12 +525,14 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
term->grid = &term->normal;
/* Cursor retains its position from the alt grid */
/* TODO: don’t need separate cursors */
term_cursor_to(
term,
min(term->grid->cursor.point.row, term->rows - 1),
min(term->grid->cursor.point.col, term->cols - 1));
term, min(term->alt.cursor.point.row, term->rows - 1),
min(term->alt.cursor.point.col, term->cols - 1));
tll_free(term->alt.scroll_damage);
if (param == 1049)
term_restore_cursor(term, &term->grid->saved_cursor);
/* Delete all sixel images on the alt screen */
tll_foreach(term->alt.sixel_images, it) {
@ -526,6 +540,7 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
tll_remove(term->alt.sixel_images, it);
}
tll_free(term->alt.scroll_damage);
term_damage_all(term);
}
break;
@ -626,6 +641,8 @@ xtsave(struct terminal *term, unsigned param)
case 1035: term->xtsave.num_lock_modifier = term->num_lock_modifier; break;
case 1036: term->xtsave.meta_esc_prefix = term->meta.esc_prefix; break;
case 1042: term->xtsave.bell_action_enabled = term->bell_action_enabled; break;
case 1047: term->xtsave.alt_screen = term->grid == &term->alt; break;
case 1048: term_save_cursor(term); break;
case 1049: term->xtsave.alt_screen = term->grid == &term->alt; break;
case 2004: term->xtsave.bracketed_paste = term->bracketed_paste; break;
case 27127: term->xtsave.modify_escape_key = term->modify_escape_key; break;
@ -661,6 +678,8 @@ xtrestore(struct terminal *term, unsigned param)
case 1035: enable = term->xtsave.num_lock_modifier; break;
case 1036: enable = term->xtsave.meta_esc_prefix; break;
case 1042: enable = term->xtsave.bell_action_enabled; break;
case 1047: enable = term->xtsave.alt_screen; break;
case 1048: enable = true; break;
case 1049: enable = term->xtsave.alt_screen; break;
case 2004: enable = term->xtsave.bracketed_paste; break;
case 27127: enable = term->xtsave.modify_escape_key; break;