1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wwadd.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/wwadd.c,v 1.1.1.1.14.1 2001/05/17 09:45:01 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/wwadd.c,v 1.2 2003/06/17 04:29:34 dillon Exp $ 39 */ 40 41 #include "ww.h" 42 43 /* 44 * Stick w1 behind w2. 45 */ 46 wwadd(w1, w2) 47 register struct ww *w1; 48 struct ww *w2; 49 { 50 register i; 51 register struct ww *w; 52 53 w1->ww_order = w2->ww_order + 1; 54 w1->ww_back = w2; 55 w1->ww_forw = w2->ww_forw; 56 w2->ww_forw->ww_back = w1; 57 w2->ww_forw = w1; 58 59 for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) 60 w->ww_order++; 61 for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { 62 register j; 63 register char *smap = wwsmap[i]; 64 register char *win = w1->ww_win[i]; 65 union ww_char *ns = wwns[i]; 66 union ww_char *buf = w1->ww_buf[i]; 67 int nvis = 0; 68 int nchanged = 0; 69 70 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { 71 w = wwindex[smap[j]]; 72 if (w1->ww_order > w->ww_order) 73 continue; 74 if (win[j] & WWM_GLS) 75 continue; 76 if (w != &wwnobody && w->ww_win[i][j] == 0) 77 w->ww_nvis[i]--; 78 smap[j] = w1->ww_index; 79 if (win[j] == 0) 80 nvis++; 81 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; 82 nchanged++; 83 } 84 if (nchanged > 0) 85 wwtouched[i] |= WWU_TOUCHED; 86 w1->ww_nvis[i] = nvis; 87 } 88 } 89