Date: Sat, 28 Oct 1995 18:18:28 +0000 () From: John Kurtz <jkurtz@ulantris.neosoft.com> To: hackers@freebsd.org Subject: adding cursor saving and regions to syscons Message-ID: <199510281818.SAA00950@ulantris.neosoft.com>
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Hello Team!
This is my first hack on the kernel, so here goes. In my testing of certain
ANSI features offered on muds (yes, I visit them and run one), I found the
cursor position saving/restoring and scroll regions not supported. I have
tested this on my machine, but I feel that I didn't quite cover all the cases
on the scrolling regions. This is done with diff on the syscons.c file. The
full path is /usr/src/sys/i386/isa/syscons.c and is still in the 2.0R version
of source so I am not sure how well this integrates into FreeBSD-current.
Anyhow, here is the diff file...
------------------------------------------------------ CLIP HERE -----------
162a163,169
> int xpos_saved; /* saved X position */
> int ypos_saved; /* saved Y position */
> char position_saved; /* has the cursor position */
> /* been saved? */
> char region_set; /* is a scroll region active? */
> int region_top; /* top of scroll region */
> int region_bottom; /* bottom of scroll region */
739a747
> scp->region_set = 0;
1464a1473
> scp->region_set = 0;
1601c1610,1625
< if (scp->ypos > 0)
---
> if (scp->region_set) {
> if (scp->ypos > scp->region_top)
> move_crsr(scp, scp->xpos, scp->ypos - 1);
> else if(scp->ypos == scp->region_top) {
> move_up(scp->crt_base +
> (scp->xsize * scp->region_top),
> scp->crt_base +
> (scp->xsize *
> (scp->region_top+1)),
> (scp->region_bottom -
> scp->region_top) * scp->xsize);
> fillw(scp->term.cur_attr | scr_map[0x20],
> scp->crt_base + (scp->xsize *
> scp->region_top), scp->xsize);
> }
> } else if (scp->ypos > 0)
1735a1760
> /* does this need to work for regions? */
1747a1773
> /* does this need to work for regions? */
1784a1811,1826
> if(scp->region_set) {
> if (n > scp->region_bottom-scp->region_top+1)
> n = scp->region_bottom-
> scp->region_top+1;
> bcopy(scp->crt_base +
> (scp->xsize * (n+scp->region_top)),
> scp->crt_base +
> (scp->xsize * scp->region_top),
> scp->xsize * (scp->ysize - n) *
> sizeof(u_short));
> fillw(scp->term.cur_attr | scr_map[0x20],
> scp->crt_base + scp->xsize *
> (scp->region_bottom - n + 1),
> scp->xsize * n);
> break;
> }
1798a1841,1856
> if(scp->region_set) {
> if (n > scp->region_bottom-scp->region_top+1)
> n = scp->region_bottom-
> scp->region_top+1;
> bcopy(scp->crt_base +
> (scp->xsize * scp->region_top),
> scp->crt_base +
> (scp->xsize * (n+scp->region_top)),
> scp->xsize * (scp->ysize - n) *
> sizeof(u_short));
> fillw(scp->term.cur_attr | scr_map[0x20],
> scp->crt_base + scp->xsize *
> scp->region_top,
> scp->xsize * n);
> break;
> }
1891a1950,1995
> case 'r': /* Region setting */
> if (scp->term.num_param == 0)
> scp->region_set = 0;
> else if (scp->term.num_param == 2) {
> if(!scp->term.param[0] && !scp->term.param[1])
> scp->region_set = 0;
> else {
> scp->region_set = 1;
> scp->region_top = scp->term.param[0];
> scp->region_bottom = scp->term.param[1];
> if(scp->region_top > scp->region_bottom)
> scp->region_set = 0;
> else {
> if(--scp->region_top < 0)
> scp->region_top = 0;
> if(scp->region_top >=
> scp->ysize)
> scp->region_top =
> scp->ysize;
> if(--scp->region_bottom < 0)
> scp->region_bottom = 0;
> if(scp->region_bottom >=
> scp->ysize)
> scp->region_bottom =
> scp->ysize;
> }
> }
> }
> break;
> case 's': /* save the cursor position -- should this be */
> /* allowed to save multiple points??? */
> scp->position_saved = 1;
> scp->xpos_saved = scp->xpos;
> scp->ypos_saved = scp->ypos;
> break;
>
> case 'u': /* restore the cursor position -- should this be */
> /* allowed to restore multiple points??? */
> if(scp->position_saved) {
> scp->position_saved = 0;
> scp->xpos = scp->xpos_saved;
> scp->ypos = scp->ypos_saved;
> move_crsr(scp, scp->xpos, scp->ypos);
> }
> break;
>
2075c2179,2193
< if (scp->crtat >= scp->crt_base + scp->ysize * scp->xsize) {
---
> if(scp->region_set) {
> if (scp->crtat ==
> scp->crt_base + (scp->region_bottom+1) * scp->xsize) {
> bcopy(scp->crt_base + (scp->region_top+1)*scp->xsize,
> scp->crt_base + scp->region_top*scp->xsize,
> scp->xsize *
> (scp->region_bottom-scp->region_top) *
> sizeof(u_short));
> fillw(scp->term.cur_attr | scr_map[0x20],
> scp->crt_base + scp->xsize * scp->region_bottom,
> scp->xsize);
> scp->crtat -= scp->xsize;
> scp->ypos--;
> }
> } else if (scp->crtat >= scp->crt_base + scp->ysize * scp->xsize) {
2163a2282,2283
> scp->position_saved = 0;
> scp->region_set = 0;
------------------------------------------------------ CLIP HERE -----------
John Kurtz (jkurtz@neosoft.com)
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