diff options
Diffstat (limited to 'usr.bin/window/xxflush.c')
| -rw-r--r-- | usr.bin/window/xxflush.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/usr.bin/window/xxflush.c b/usr.bin/window/xxflush.c deleted file mode 100644 index a6f9bed48931..000000000000 --- a/usr.bin/window/xxflush.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Copyright (c) 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Wang at The University of California, Berkeley. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef lint -static char sccsid[] = "@(#)xxflush.c 8.1 (Berkeley) 6/6/93"; -static char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - -#include "ww.h" -#include "xx.h" -#include "tt.h" - -xxflush(intr) - register intr; -{ - register struct xx *xp, *xq; - - for (xp = xx_head; xp != 0 && !(intr && wwinterrupt()); xp = xq) { - switch (xp->cmd) { - case xc_move: - if (xp->link == 0) - (*tt.tt_move)(xp->arg0, xp->arg1); - break; - case xc_scroll: - xxflush_scroll(xp); - break; - case xc_inschar: - (*tt.tt_move)(xp->arg0, xp->arg1); - tt.tt_nmodes = xp->arg3; - (*tt.tt_inschar)(xp->arg2); - break; - case xc_insspace: - (*tt.tt_move)(xp->arg0, xp->arg1); - (*tt.tt_insspace)(xp->arg2); - break; - case xc_delchar: - (*tt.tt_move)(xp->arg0, xp->arg1); - (*tt.tt_delchar)(xp->arg2); - break; - case xc_clear: - (*tt.tt_clear)(); - break; - case xc_clreos: - (*tt.tt_move)(xp->arg0, xp->arg1); - (*tt.tt_clreos)(); - break; - case xc_clreol: - (*tt.tt_move)(xp->arg0, xp->arg1); - (*tt.tt_clreol)(); - break; - case xc_write: - (*tt.tt_move)(xp->arg0, xp->arg1); - tt.tt_nmodes = xp->arg3; - (*tt.tt_write)(xp->buf, xp->arg2); - break; - } - xq = xp->link; - xxfree(xp); - } - if ((xx_head = xp) == 0) { - xx_tail = 0; - xxbufp = xxbuf; - } - ttflush(); -} - -xxflush_scroll(xp) - register struct xx *xp; -{ - register struct xx *xq; - - top: - if (xp->arg0 == 0) - return; - /* - * We handle retain (da and db) by putting the burden on scrolling up, - * which is the less common operation. It must ensure that - * text is not pushed below the screen, so scrolling down doesn't - * have to worry about it. - * - * Try scrolling region (or scrolling the whole screen) first. - * Can we assume "sr" doesn't push text below the screen - * so we don't have to worry about retain below? - * What about scrolling down with a newline? It probably does - * push text above (with da). Scrolling up would then have - * to take care of that. - * It's easy to be fool proof, but that slows things down. - * The current solution is to disallow tt_scroll_up if da or db is true - * but cs (scrolling region) is not. Again, we sacrifice scrolling - * up in favor of scrolling down. The idea is having scrolling regions - * probably means we can scroll (even the whole screen) with impunity. - * This lets us work efficiently on simple terminals (use newline - * on the bottom to scroll), on any terminal without retain, and - * on vt100 style scrolling regions (I think). - */ - if (xp->arg0 > 0) { - if ((xq = xp->link) != 0 && xq->cmd == xc_scroll && - xp->arg2 == xq->arg2 && xq->arg0 < 0) { - if (xp->arg1 < xq->arg1) { - if (xp->arg2 - xp->arg0 <= xq->arg1) { - xq->arg0 = xp->arg0; - xq->arg1 = xp->arg1; - xq->arg2 = xp->arg2; - return; - } - xp->arg2 = xq->arg1 + xp->arg0; - xq->arg0 += xp->arg0; - xq->arg1 = xp->arg2; - if (xq->arg0 > 0) - xq->arg1 -= xq->arg0; - goto top; - } else { - if (xp->arg1 - xq->arg0 >= xp->arg2) - return; - xq->arg2 = xp->arg1 - xq->arg0; - xp->arg0 += xq->arg0; - xp->arg1 = xq->arg2; - if (xp->arg0 < 0) - xp->arg1 += xp->arg0; - goto top; - } - } - if (xp->arg0 > xp->arg2 - xp->arg1) - xp->arg0 = xp->arg2 - xp->arg1; - if (tt.tt_scroll_down) { - if (tt.tt_scroll_top != xp->arg1 || - tt.tt_scroll_bot != xp->arg2 - 1) { - if (tt.tt_setscroll == 0) - goto down; - (*tt.tt_setscroll)(xp->arg1, xp->arg2 - 1); - } - tt.tt_scroll_down(xp->arg0); - } else { - down: - (*tt.tt_move)(xp->arg1, 0); - (*tt.tt_delline)(xp->arg0); - if (xp->arg2 < tt.tt_nrow) { - (*tt.tt_move)(xp->arg2 - xp->arg0, 0); - (*tt.tt_insline)(xp->arg0); - } - } - } else { - xp->arg0 = - xp->arg0; - if (xp->arg0 > xp->arg2 - xp->arg1) - xp->arg0 = xp->arg2 - xp->arg1; - if (tt.tt_scroll_up) { - if (tt.tt_scroll_top != xp->arg1 || - tt.tt_scroll_bot != xp->arg2 - 1) { - if (tt.tt_setscroll == 0) - goto up; - (*tt.tt_setscroll)(xp->arg1, xp->arg2 - 1); - } - tt.tt_scroll_up(xp->arg0); - } else { - up: - if (tt.tt_retain || xp->arg2 != tt.tt_nrow) { - (*tt.tt_move)(xp->arg2 - xp->arg0, 0); - (*tt.tt_delline)(xp->arg0); - } - (*tt.tt_move)(xp->arg1, 0); - (*tt.tt_insline)(xp->arg0); - } - } -} |