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Annotation of 43BSDTahoe/ucb/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:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)wwadd.c    3.11 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: 
        !            24: /*
        !            25:  * Stick w1 behind w2.
        !            26:  */
        !            27: wwadd(w1, w2)
        !            28: register struct ww *w1;
        !            29: struct ww *w2;
        !            30: {
        !            31:        register i;
        !            32:        register struct ww *w;
        !            33: 
        !            34:        w1->ww_order = w2->ww_order + 1;
        !            35:        w1->ww_back = w2;
        !            36:        w1->ww_forw = w2->ww_forw;
        !            37:        w2->ww_forw->ww_back = w1;
        !            38:        w2->ww_forw = w1;
        !            39: 
        !            40:        for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
        !            41:                w->ww_order++;
        !            42:        for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
        !            43:                register j;
        !            44:                register char *smap = wwsmap[i];
        !            45:                register char *win = w1->ww_win[i];
        !            46:                union ww_char *ns = wwns[i];
        !            47:                union ww_char *buf = w1->ww_buf[i];
        !            48:                int nvis = 0;
        !            49:                int nchanged = 0;
        !            50: 
        !            51:                for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
        !            52:                        w = wwindex[smap[j]];
        !            53:                        if (w1->ww_order > w->ww_order)
        !            54:                                continue;
        !            55:                        if (win[j] & WWM_GLS)
        !            56:                                continue;
        !            57:                        if (w != &wwnobody && w->ww_win[i][j] == 0)
        !            58:                                w->ww_nvis[i]--;
        !            59:                        smap[j] = w1->ww_index;
        !            60:                        if (win[j] == 0)
        !            61:                                nvis++;
        !            62:                        ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
        !            63:                        nchanged++;
        !            64:                }
        !            65:                if (nchanged > 4)
        !            66:                        wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED;
        !            67:                else if (nchanged > 0)
        !            68:                        wwtouched[i] |= WWU_TOUCHED;
        !            69:                w1->ww_nvis[i] = nvis;
        !            70:        }
        !            71: }

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