InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/usr.bin/window/wwsize.c

C/C++ Source or Header | 1991-04-18 | 5.2 KB | 192 lines

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwsize.c    3.10 (Berkeley) 8/12/90";
#endif /* not lint */

#include "ww.h"

/*
 * Resize a window.  Should be unattached.
 */
wwsize(w, nrow, ncol)
register struct ww *w;
{
    register i, j;
    int nline;
    union ww_char **buf = 0;
    char **win = 0;
    short *nvis = 0;
    char **fmap = 0;
    char m;

    /*
     * First allocate new buffers.
     */
    win = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
    if (win == 0)
        goto bad;
    if (w->ww_fmap != 0) {
        fmap = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
        if (fmap == 0)
            goto bad;
    }
    if (nrow > w->ww_b.nr || ncol > w->ww_b.nc) {
        nline = MAX(w->ww_b.nr, nrow);
        buf = (union ww_char **) wwalloc(w->ww_b.t, w->ww_b.l,
            nline, ncol, sizeof (union ww_char));
        if (buf == 0)
            goto bad;
    }
    nvis = (short *)malloc((unsigned) nrow * sizeof (short));
    if (nvis == 0) {
        wwerrno = WWE_NOMEM;
        goto bad;
    }
    nvis -= w->ww_w.t;
    /*
     * Copy text buffer.
     */
    if (buf != 0) {
        int b, r;

        b = w->ww_b.t + nline;
        r = w->ww_b.l + ncol;
        if (ncol < w->ww_b.nc)
            for (i = w->ww_b.t; i < w->ww_b.b; i++)
                for (j = w->ww_b.l; j < r; j++)
                    buf[i][j] = w->ww_buf[i][j];
        else
            for (i = w->ww_b.t; i < w->ww_b.b; i++) {
                for (j = w->ww_b.l; j < w->ww_b.r; j++)
                    buf[i][j] = w->ww_buf[i][j];
                for (; j < r; j++)
                    buf[i][j].c_w = ' ';
            }
        for (; i < b; i++)
            for (j = w->ww_b.l; j < r; j++)
                buf[i][j].c_w = ' ';
    }
    /*
     * Now free the old stuff.
     */
    wwfree((char **)w->ww_win, w->ww_w.t);
    w->ww_win = win;
    if (buf != 0) {
        wwfree((char **)w->ww_buf, w->ww_b.t);
        w->ww_buf = buf;
    }
    if (w->ww_fmap != 0) {
        wwfree((char **)w->ww_fmap, w->ww_w.t);
        w->ww_fmap = fmap;
    }
    free((char *)(w->ww_nvis + w->ww_w.t));
    w->ww_nvis = nvis;
    /*
     * Set new sizes.
     */
        /* window */
    w->ww_w.b = w->ww_w.t + nrow;
    w->ww_w.r = w->ww_w.l + ncol;
    w->ww_w.nr = nrow;
    w->ww_w.nc = ncol;
        /* text buffer */
    if (buf != 0) {
        w->ww_b.b = w->ww_b.t + nline;
        w->ww_b.r = w->ww_b.l + ncol;
        w->ww_b.nr = nline;
        w->ww_b.nc = ncol;
    }
        /* scroll */
    if ((i = w->ww_b.b - w->ww_w.b) < 0 ||
        (i = w->ww_cur.r - w->ww_w.b + 1) > 0) {
        w->ww_buf += i;
        w->ww_b.t -= i;
        w->ww_b.b -= i;
        w->ww_cur.r -= i;
    }
        /* interior */
    w->ww_i.b = MIN(w->ww_w.b, wwnrow);
    w->ww_i.r = MIN(w->ww_w.r, wwncol);
    w->ww_i.nr = w->ww_i.b - w->ww_i.t;
    w->ww_i.nc = w->ww_i.r - w->ww_i.l;
    /*
     * Initialize new buffers.
     */
        /* window */
    m = 0;
    if (w->ww_oflags & WWO_GLASS)
        m |= WWM_GLS;
    if (w->ww_oflags & WWO_REVERSE)
        m |= WWM_REV;
    for (i = w->ww_w.t; i < w->ww_w.b; i++)
        for (j = w->ww_w.l; j < w->ww_w.r; j++)
            w->ww_win[i][j] = m;
        /* frame map */
    if (fmap != 0)
        for (i = w->ww_w.t; i < w->ww_w.b; i++)
            for (j = w->ww_w.l; j < w->ww_w.r; j++)
                w->ww_fmap[i][j] = 0;
        /* visibility */
    j = m ? 0 : w->ww_w.nc;
    for (i = w->ww_w.t; i < w->ww_w.b; i++)
        w->ww_nvis[i] = j;
    /*
     * Put cursor back.
     */
    if (w->ww_hascursor) {
        w->ww_hascursor = 0;
        wwcursor(w, 1);
    }
    /*
     * Fool with pty.
     */
    if (w->ww_ispty && w->ww_pty >= 0)
        (void) wwsetttysize(w->ww_pty, nrow, ncol);
    return 0;
bad:
    if (win != 0)
        wwfree(win, w->ww_w.t);
    if (fmap != 0)
        wwfree(fmap, w->ww_w.t);
    if (buf != 0)
        wwfree((char **)buf, w->ww_b.t);
    if (nvis != 0)
        free((char *)(nvis + w->ww_w.t));
    return -1;
}