usr.bin/window/wwsize.c

   1 /*      @(#)wwsize.c    8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwsize.c,v 1.9 2006/05/02 22:24:05 christos Exp $      */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <stdlib.h>
  37 #include "ww.h"
  38
  39 /*
  40  * Resize a window.  Should be unattached.
  41  */
  42 int
  43 wwsize(struct ww *w, int nrow, int ncol)
  44 {
  45         int i, j;
  46         int nline = 0;
  47         union ww_char **buf = NULL;
  48         char **win = NULL;
  49         short *nvis = NULL;
  50         char **fmap = NULL;
  51         char m;
  52
  53         /*
  54          * First allocate new buffers.
  55          */
  56         win = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
  57         if (win == NULL)
  58                 goto bad;
  59         if (w->ww_fmap != 0) {
  60                 fmap = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
  61                 if (fmap == NULL)
  62                         goto bad;
  63         }
  64         if (nrow > w->ww_b.nr || ncol > w->ww_b.nc) {
  65                 nline = MAX(w->ww_b.nr, nrow);
  66                 buf = (union ww_char **) wwalloc(w->ww_b.t, w->ww_b.l,
  67                         nline, ncol, sizeof (union ww_char));
  68                 if (buf == NULL)
  69                         goto bad;
  70         }
  71         nvis = (short *)malloc((unsigned) nrow * sizeof (short));
  72         if (nvis == NULL) {
  73                 wwerrno = WWE_NOMEM;
  74                 goto bad;
  75         }
  76         nvis -= w->ww_w.t;
  77         /*
  78          * Copy text buffer.
  79          */
  80         if (buf != NULL) {
  81                 int b, r;
  82
  83                 b = w->ww_b.t + nline;
  84                 r = w->ww_b.l + ncol;
  85                 if (ncol < w->ww_b.nc)
  86                         for (i = w->ww_b.t; i < w->ww_b.b; i++)
  87                                 for (j = w->ww_b.l; j < r; j++)
  88                                         buf[i][j] = w->ww_buf[i][j];
  89                 else
  90                         for (i = w->ww_b.t; i < w->ww_b.b; i++) {
  91                                 for (j = w->ww_b.l; j < w->ww_b.r; j++)
  92                                         buf[i][j] = w->ww_buf[i][j];
  93                                 for (; j < r; j++)
  94                                         buf[i][j].c_w = ' ';
  95                         }
  96                 for (; i < b; i++)
  97                         for (j = w->ww_b.l; j < r; j++)
  98                                 buf[i][j].c_w = ' ';
  99         }
 100         /*
 101          * Now free the old stuff.
 102          */
 103         wwfree((char **)w->ww_win, w->ww_w.t);
 104         w->ww_win = win;
 105         if (buf != NULL) {
 106                 wwfree((char **)w->ww_buf, w->ww_b.t);
 107                 w->ww_buf = buf;
 108         }
 109         if (w->ww_fmap != 0) {
 110                 wwfree((char **)w->ww_fmap, w->ww_w.t);
 111                 w->ww_fmap = fmap;
 112         }
 113         free((char *)(w->ww_nvis + w->ww_w.t));
 114         w->ww_nvis = nvis;
 115         /*
 116          * Set new sizes.
 117          */
 118                 /* window */
 119         w->ww_w.b = w->ww_w.t + nrow;
 120         w->ww_w.r = w->ww_w.l + ncol;
 121         w->ww_w.nr = nrow;
 122         w->ww_w.nc = ncol;
 123                 /* text buffer */
 124         if (buf != NULL) {
 125                 w->ww_b.b = w->ww_b.t + nline;
 126                 w->ww_b.r = w->ww_b.l + ncol;
 127                 w->ww_b.nr = nline;
 128                 w->ww_b.nc = ncol;
 129         }
 130                 /* scroll */
 131         if ((i = w->ww_b.b - w->ww_w.b) < 0 ||
 132             (i = w->ww_cur.r - w->ww_w.b + 1) > 0) {
 133                 w->ww_buf += i;
 134                 w->ww_b.t -= i;
 135                 w->ww_b.b -= i;
 136                 w->ww_cur.r -= i;
 137         }
 138                 /* interior */
 139         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
 140         w->ww_i.r = MIN(w->ww_w.r, wwncol);
 141         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
 142         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
 143         /*
 144          * Initialize new buffers.
 145          */
 146                 /* window */
 147         m = 0;
 148         if (w->ww_oflags & WWO_GLASS)
 149                 m |= WWM_GLS;
 150         if (w->ww_oflags & WWO_REVERSE)
 151                 m |= WWM_REV;
 152         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 153                 for (j = w->ww_w.l; j < w->ww_w.r; j++)
 154                         w->ww_win[i][j] = m;
 155                 /* frame map */
 156         if (fmap != NULL)
 157                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
 158                         for (j = w->ww_w.l; j < w->ww_w.r; j++)
 159                                 w->ww_fmap[i][j] = 0;
 160                 /* visibility */
 161         j = m ? 0 : w->ww_w.nc;
 162         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 163                 w->ww_nvis[i] = j;
 164         /*
 165          * Put cursor back.
 166          */
 167         if (ISSET(w->ww_wflags, WWW_HASCURSOR)) {
 168                 CLR(w->ww_wflags, WWW_HASCURSOR);
 169                 wwcursor(w, 1);
 170         }
 171         /*
 172          * Fool with pty.
 173          */
 174         if (w->ww_type == WWT_PTY && w->ww_pty >= 0)
 175                 (void) wwsetttysize(w->ww_pty, nrow, ncol);
 176         return 0;
 177 bad:
 178         if (win != NULL)
 179                 wwfree(win, w->ww_w.t);
 180         if (fmap != NULL)
 181                 wwfree(fmap, w->ww_w.t);
 182         if (buf != NULL)
 183                 wwfree((char **)buf, w->ww_b.t);
 184         return -1;
 185 }