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
wwsize(struct ww * w,int nrow,int ncol)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 = 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 }
186