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Emulate CSR with existing screen data on old/stupid terminals which don't support it.

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This commit is contained in:
Nicholas Marriott
2009-02-11 19:06:58 +00:00
parent 6c76aaca92
commit d5eaf3a9f6
4 changed files with 92 additions and 19 deletions
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88
tty.c
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@ -1,4 +1,4 @@
/* $Id: tty.c,v 1.69 2009-02-11 18:44:08 nicm Exp $ */
/* $Id: tty.c,v 1.70 2009-02-11 19:06:58 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -32,6 +32,7 @@ u_char tty_get_acs(struct tty *, u_char);
void tty_emulate_repeat(
struct tty *, enum tty_code_code, enum tty_code_code, u_int);
void tty_draw_line(struct tty *, struct window_pane *, u_int);
void tty_raw(struct tty *, const char *);
@ -368,6 +369,27 @@ tty_emulate_repeat(
}
}
void
tty_draw_line(struct tty *tty, struct window_pane *wp, u_int py)
{
struct screen *s = wp->screen;
const struct grid_cell *gc;
struct grid_cell tc;
u_int i;
for (i = 0; i < tty->sx; i++) {
gc = grid_view_peek_cell(s->grid, i, py);
tty_cursor(tty, i, py, wp->yoff);
if (screen_check_selection(s, i, py)) {
memcpy(&tc, &s->sel.cell, sizeof tc);
tc.data = gc->data;
tty_cell(tty, &tc);
} else
tty_cell(tty, gc);
}
}
void
tty_write(struct tty *tty, struct window_pane *wp, enum tty_cmd cmd, ...)
{
@ -428,7 +450,22 @@ void
tty_cmd_insertline(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
u_int ua, i;
if (!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. Redraw using data from screen
* (already updated).
*/
if (s->old_cy < s->old_rupper || s->old_cy > s->old_rlower) {
for (i = s->old_cy; i < screen_size_y(s); i++)
tty_draw_line(tty, wp, i);
} else {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp, i);
}
return;
}
ua = va_arg(ap, u_int);
@ -444,7 +481,22 @@ void
tty_cmd_deleteline(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
u_int ua, i;
if (!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. Redraw using data from screen
* (already updated).
*/
if (s->old_cy < s->old_rupper || s->old_cy > s->old_rlower) {
for (i = s->old_cy; i < screen_size_y(s); i++)
tty_draw_line(tty, wp, i);
} else {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp, i);
}
return;
}
ua = va_arg(ap, u_int);
@ -514,6 +566,19 @@ void
tty_cmd_reverseindex(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
if (!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. If would have scrolled, redraw
* scroll region from already updated window screen.
*/
if (s->old_cy == s->old_rupper) {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp, i);
return;
}
}
tty_reset(tty);
@ -527,6 +592,19 @@ void
tty_cmd_linefeed(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
if (!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. If would have scrolled, redraw
* scroll region from already updated window screen.
*/
if (s->old_cy == s->old_rlower) {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp, i);
return;
}
}
tty_reset(tty);
@ -694,11 +772,13 @@ tty_reset(struct tty *tty)
void
tty_region(struct tty *tty, u_int rupper, u_int rlower, u_int oy)
{
if (!tty_term_has(tty->term, TTYC_CSR))
return;
if (tty->rlower != oy + rlower || tty->rupper != oy + rupper) {
tty->rlower = oy + rlower;
tty->rupper = oy + rupper;
tty->cx = 0;
tty->cy = 0;
tty->cy = 0;
tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
}
}