/* $OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $ */ /* * Copyright (c) 1996 SigmaSoft, Th. Lockert <tholo@sigmasoft.com> * All rights reserved. * * 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 SigmaSoft, Th. Lockert. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 rcsid[] = "$OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $"; #endif #include <string.h> #include <unistd.h> #include <termios.h> #include "term.h" static int rawmode() { struct termios ti; if (tcgetattr(STDIN_FILENO, &ti) < 0) return 1; if (ti.c_oflag & OPOST) if (ti.c_oflag & ONLCR) return 0; return 1; } /* * Optimized cursor movement, assume cursor is currently * located at (oldx,oldy), output what is needed for the * cursor to be relocated to (newx,newy) */ int _mvcur(oldy, oldx, newy, newx) int oldy; int oldx; int newy; int newx; { int l, c, raw; char *p; if (newx >= columns) { newy += newx / columns; newx %= columns; } if (oldx >= columns) { l = (oldx + 1) / columns; oldy += l; oldx %= columns; if (!auto_right_margin) { raw = rawmode(); while (l > 0) { if (raw) if (carriage_return != NULL) tputs(carriage_return, 0, _ti_outc); else _ti_outc('\r'); if (linefeed_if_not_lf != NULL) tputs(linefeed_if_not_lf, 0, _ti_outc); else _ti_outc('\n'); l--; } oldx = 0; } if (oldy >= lines - 1) { newy -= oldy - (lines - 1); oldy = lines - 1; } } if (newy >= lines) { l = newy; newy = lines - 1; if (oldy < lines - 1) { c = newx; if (cursor_address == NULL) newx = 0; mvcur(oldy, oldx, newy, newx); newx = c; } while (l >= lines) { if (linefeed_if_not_lf != NULL) tputs(linefeed_if_not_lf, 0, _ti_outc); else _ti_outc('\n'); l--; oldx = 0; } } if (newy < oldy && !(cursor_address != NULL || cursor_up != NULL)) newy = oldy; if (cursor_address != NULL) { p = tparm(cursor_address, newx, newy); tputs(p, 0, _ti_outc); } else return ERR; return OK; }