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Annotation of 43BSDReno/usr.bin/window/wwadd.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * 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 are permitted provided
                      9:  * that: (1) source distributions retain this entire copyright notice and
                     10:  * comment, and (2) distributions including binaries display the following
                     11:  * acknowledgement:  ``This product includes software developed by the
                     12:  * University of California, Berkeley and its contributors'' in the
                     13:  * documentation or other materials provided with the distribution and in
                     14:  * all advertising materials mentioning features or use of this software.
                     15:  * Neither the name of the University nor the names of its contributors may
                     16:  * be used to endorse or promote products derived from this software without
                     17:  * specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  */
                     22: 
                     23: #ifndef lint
                     24: static char sccsid[] = "@(#)wwadd.c    3.14 (Berkeley) 6/6/90";
                     25: #endif /* not lint */
                     26: 
                     27: #include "ww.h"
                     28: 
                     29: /*
                     30:  * Stick w1 behind w2.
                     31:  */
                     32: wwadd(w1, w2)
                     33: register struct ww *w1;
                     34: struct ww *w2;
                     35: {
                     36:        register i;
                     37:        register struct ww *w;
                     38: 
                     39:        w1->ww_order = w2->ww_order + 1;
                     40:        w1->ww_back = w2;
                     41:        w1->ww_forw = w2->ww_forw;
                     42:        w2->ww_forw->ww_back = w1;
                     43:        w2->ww_forw = w1;
                     44: 
                     45:        for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
                     46:                w->ww_order++;
                     47:        for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
                     48:                register j;
                     49:                register char *smap = wwsmap[i];
                     50:                register char *win = w1->ww_win[i];
                     51:                union ww_char *ns = wwns[i];
                     52:                union ww_char *buf = w1->ww_buf[i];
                     53:                int nvis = 0;
                     54:                int nchanged = 0;
                     55: 
                     56:                for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
                     57:                        w = wwindex[smap[j]];
                     58:                        if (w1->ww_order > w->ww_order)
                     59:                                continue;
                     60:                        if (win[j] & WWM_GLS)
                     61:                                continue;
                     62:                        if (w != &wwnobody && w->ww_win[i][j] == 0)
                     63:                                w->ww_nvis[i]--;
                     64:                        smap[j] = w1->ww_index;
                     65:                        if (win[j] == 0)
                     66:                                nvis++;
                     67:                        ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
                     68:                        nchanged++;
                     69:                }
                     70:                if (nchanged > 0)
                     71:                        wwtouched[i] |= WWU_TOUCHED;
                     72:                w1->ww_nvis[i] = nvis;
                     73:        }
                     74: }

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