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Annotation of 43BSDTahoe/ucb/window/wwdelete.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[] = "@(#)wwdelete.c 3.16 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: 
        !            24: /*
        !            25:  * Pull w free from the cover list.
        !            26:  */
        !            27: wwdelete(w)
        !            28: register struct ww *w;
        !            29: {
        !            30:        register i;
        !            31: 
        !            32:        for (i = w->ww_i.t; i < w->ww_i.b; i++) {
        !            33:                register j;
        !            34:                register char *smap = wwsmap[i];
        !            35:                register union ww_char *ns = wwns[i];
        !            36:                register int nchanged = 0;
        !            37: 
        !            38:                for (j = w->ww_i.l; j < w->ww_i.r; j++)
        !            39:                        if (smap[j] == w->ww_index) {
        !            40:                                smap[j] = WWX_NOBODY;
        !            41:                                ns[j].c_w = ' ';
        !            42:                                nchanged++;
        !            43:                        }
        !            44:                if (nchanged > 4)
        !            45:                        wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED;
        !            46:                else if (nchanged > 0)
        !            47:                        wwtouched[i] |= WWU_TOUCHED;
        !            48:        }
        !            49: 
        !            50:        {
        !            51:                register struct ww *wp;
        !            52: 
        !            53:                for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
        !            54:                        wp->ww_order--;
        !            55:        }
        !            56: 
        !            57:        if (w->ww_forw != &wwhead)
        !            58:                wwdelete1(w->ww_forw,
        !            59:                        w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
        !            60: 
        !            61:        w->ww_back->ww_forw = w->ww_forw;
        !            62:        w->ww_forw->ww_back = w->ww_back;
        !            63:        w->ww_forw = w->ww_back = 0;
        !            64: }
        !            65: 
        !            66: wwdelete1(w, t, b, l, r)
        !            67: register struct ww *w;
        !            68: {
        !            69:        int i;
        !            70:        int tt, bb, ll, rr;
        !            71:        char hasglass;
        !            72: 
        !            73: again:
        !            74:        hasglass = 0;
        !            75:        tt = MAX(t, w->ww_i.t);
        !            76:        bb = MIN(b, w->ww_i.b);
        !            77:        ll = MAX(l, w->ww_i.l);
        !            78:        rr = MIN(r, w->ww_i.r);
        !            79:        if (tt >= bb || ll >= rr) {
        !            80:                if ((w = w->ww_forw) == &wwhead)
        !            81:                        return;
        !            82:                goto again;
        !            83:        }
        !            84:        for (i = tt; i < bb; i++) {
        !            85:                register j;
        !            86:                register char *smap = wwsmap[i];
        !            87:                register union ww_char *ns = wwns[i];
        !            88:                register char *win = w->ww_win[i];
        !            89:                register union ww_char *buf = w->ww_buf[i];
        !            90:                int nvis = w->ww_nvis[i];
        !            91:                int nchanged = 0;
        !            92: 
        !            93:                for (j = ll; j < rr; j++) {
        !            94:                        if (smap[j] != WWX_NOBODY)
        !            95:                                continue;
        !            96:                        if (win[j] & WWM_GLS) {
        !            97:                                hasglass = 1;
        !            98:                                continue;
        !            99:                        }
        !           100:                        smap[j] = w->ww_index;
        !           101:                        ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
        !           102:                        nchanged++;
        !           103:                        if (win[j] == 0)
        !           104:                                nvis++;
        !           105:                }
        !           106:                if (nchanged > 4)
        !           107:                        wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED;
        !           108:                else if (nchanged > 0)
        !           109:                        wwtouched[i] |= WWU_TOUCHED;
        !           110:                w->ww_nvis[i] = nvis;
        !           111:        }
        !           112:        if ((w = w->ww_forw) == &wwhead)
        !           113:                return;
        !           114:        if (hasglass)
        !           115:                goto again;
        !           116:        if (tt > t)
        !           117:                wwdelete1(w, t, tt, l, r);
        !           118:        if (bb < b)
        !           119:                wwdelete1(w, bb, b, l, r);
        !           120:        if (ll > l)
        !           121:                wwdelete1(w, tt, bb, l, ll);
        !           122:        if (rr < r)
        !           123:                wwdelete1(w, tt, bb, rr, r);
        !           124: }

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