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