usr.bin/window/wwsize.c

   1 /*      $NetBSD: wwsize.c,v 1.9 2006/05/02 22:24:05 christos Exp $      */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwsize.c    8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwsize.c,v 1.9 2006/05/02 22:24:05 christos Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <stdlib.h>
  45 #include "ww.h"
  46
  47 /*
  48  * Resize a window.  Should be unattached.
  49  */
  50 int
  51 wwsize(struct ww *w, int nrow, int ncol)
  52 {
  53         int i, j;
  54         int nline = 0;
  55         union ww_char **buf = 0;
  56         char **win = 0;
  57         short *nvis = 0;
  58         char **fmap = 0;
  59         char m;
  60
  61         /*
  62          * First allocate new buffers.
  63          */
  64         win = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
  65         if (win == 0)
  66                 goto bad;
  67         if (w->ww_fmap != 0) {
  68                 fmap = wwalloc(w->ww_w.t, w->ww_w.l, nrow, ncol, sizeof (char));
  69                 if (fmap == 0)
  70                         goto bad;
  71         }
  72         if (nrow > w->ww_b.nr || ncol > w->ww_b.nc) {
  73                 nline = MAX(w->ww_b.nr, nrow);
  74                 buf = (union ww_char **) wwalloc(w->ww_b.t, w->ww_b.l,
  75                         nline, ncol, sizeof (union ww_char));
  76                 if (buf == 0)
  77                         goto bad;
  78         }
  79         nvis = (short *)malloc((unsigned) nrow * sizeof (short));
  80         if (nvis == 0) {
  81                 wwerrno = WWE_NOMEM;
  82                 goto bad;
  83         }
  84         nvis -= w->ww_w.t;
  85         /*
  86          * Copy text buffer.
  87          */
  88         if (buf != 0) {
  89                 int b, r;
  90
  91                 b = w->ww_b.t + nline;
  92                 r = w->ww_b.l + ncol;
  93                 if (ncol < w->ww_b.nc)
  94                         for (i = w->ww_b.t; i < w->ww_b.b; i++)
  95                                 for (j = w->ww_b.l; j < r; j++)
  96                                         buf[i][j] = w->ww_buf[i][j];
  97                 else
  98                         for (i = w->ww_b.t; i < w->ww_b.b; i++) {
  99                                 for (j = w->ww_b.l; j < w->ww_b.r; j++)
 100                                         buf[i][j] = w->ww_buf[i][j];
 101                                 for (; j < r; j++)
 102                                         buf[i][j].c_w = ' ';
 103                         }
 104                 for (; i < b; i++)
 105                         for (j = w->ww_b.l; j < r; j++)
 106                                 buf[i][j].c_w = ' ';
 107         }
 108         /*
 109          * Now free the old stuff.
 110          */
 111         wwfree((char **)w->ww_win, w->ww_w.t);
 112         w->ww_win = win;
 113         if (buf != 0) {
 114                 wwfree((char **)w->ww_buf, w->ww_b.t);
 115                 w->ww_buf = buf;
 116         }
 117         if (w->ww_fmap != 0) {
 118                 wwfree((char **)w->ww_fmap, w->ww_w.t);
 119                 w->ww_fmap = fmap;
 120         }
 121         free((char *)(w->ww_nvis + w->ww_w.t));
 122         w->ww_nvis = nvis;
 123         /*
 124          * Set new sizes.
 125          */
 126                 /* window */
 127         w->ww_w.b = w->ww_w.t + nrow;
 128         w->ww_w.r = w->ww_w.l + ncol;
 129         w->ww_w.nr = nrow;
 130         w->ww_w.nc = ncol;
 131                 /* text buffer */
 132         if (buf != 0) {
 133                 w->ww_b.b = w->ww_b.t + nline;
 134                 w->ww_b.r = w->ww_b.l + ncol;
 135                 w->ww_b.nr = nline;
 136                 w->ww_b.nc = ncol;
 137         }
 138                 /* scroll */
 139         if ((i = w->ww_b.b - w->ww_w.b) < 0 ||
 140             (i = w->ww_cur.r - w->ww_w.b + 1) > 0) {
 141                 w->ww_buf += i;
 142                 w->ww_b.t -= i;
 143                 w->ww_b.b -= i;
 144                 w->ww_cur.r -= i;
 145         }
 146                 /* interior */
 147         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
 148         w->ww_i.r = MIN(w->ww_w.r, wwncol);
 149         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
 150         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
 151         /*
 152          * Initialize new buffers.
 153          */
 154                 /* window */
 155         m = 0;
 156         if (w->ww_oflags & WWO_GLASS)
 157                 m |= WWM_GLS;
 158         if (w->ww_oflags & WWO_REVERSE)
 159                 m |= WWM_REV;
 160         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 161                 for (j = w->ww_w.l; j < w->ww_w.r; j++)
 162                         w->ww_win[i][j] = m;
 163                 /* frame map */
 164         if (fmap != 0)
 165                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
 166                         for (j = w->ww_w.l; j < w->ww_w.r; j++)
 167                                 w->ww_fmap[i][j] = 0;
 168                 /* visibility */
 169         j = m ? 0 : w->ww_w.nc;
 170         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 171                 w->ww_nvis[i] = j;
 172         /*
 173          * Put cursor back.
 174          */
 175         if (ISSET(w->ww_wflags, WWW_HASCURSOR)) {
 176                 CLR(w->ww_wflags, WWW_HASCURSOR);
 177                 wwcursor(w, 1);
 178         }
 179         /*
 180          * Fool with pty.
 181          */
 182         if (w->ww_type == WWT_PTY && w->ww_pty >= 0)
 183                 (void) wwsetttysize(w->ww_pty, nrow, ncol);
 184         return 0;
 185 bad:
 186         if (win != 0)
 187                 wwfree(win, w->ww_w.t);
 188         if (fmap != 0)
 189                 wwfree(fmap, w->ww_w.t);
 190         if (buf != 0)
 191                 wwfree((char **)buf, w->ww_b.t);
 192         return -1;
 193 }