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Annotation of 43BSDReno/usr.bin/window/wwinsline.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[] = "@(#)wwinsline.c        3.12 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: 
        !            29: wwinsline(w, row)
        !            30: register struct ww *w;
        !            31: int row;
        !            32: {
        !            33:        register i;
        !            34:        register union ww_char **cpp, **cqq;
        !            35:        register union ww_char *cp;
        !            36:        int row1, row2;
        !            37:        char deleted;
        !            38:        int visible;
        !            39: 
        !            40:        /*
        !            41:         * Scroll first.
        !            42:         */
        !            43:        if ((row1 = row) < w->ww_i.t) {
        !            44:                row1 = w->ww_i.t;
        !            45:                visible = 0;
        !            46:        } else
        !            47:                visible = 1;
        !            48:        if ((row2 = w->ww_b.b) > w->ww_i.b) {
        !            49:                row2 = w->ww_i.b;
        !            50:        }
        !            51:        deleted = wwscroll1(w, row1, row2, -1, visible);
        !            52: 
        !            53:        /*
        !            54:         * Fix the buffer.
        !            55:         * But leave clearing the last line for wwclreol().
        !            56:         */
        !            57:        cpp = &w->ww_buf[w->ww_b.b];
        !            58:        cqq = cpp - 1;
        !            59:        cp = *cqq;
        !            60:        for (i = w->ww_b.b - row; --i > 0;)
        !            61:                *--cpp = *--cqq;
        !            62:        *cqq = cp;
        !            63: 
        !            64:        /*
        !            65:         * Now clear the last line.
        !            66:         */
        !            67:        if (visible)
        !            68:                wwclreol1(w, row, w->ww_b.l, deleted);
        !            69:        else {
        !            70:                cp += w->ww_b.l;
        !            71:                for (i = w->ww_b.nc; --i >= 0;)
        !            72:                        cp++->c_w = ' ';
        !            73:        }
        !            74: }

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