1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include <stdlib.h>
44 #include "curses_inc.h"
45
46 /*
47 * Pad refresh. These routines are provided for upward compatibility
48 * with the 'pad' structure of Sys V.2. Since windows now can be of
49 * arbitrary size and derived windows can be moved within their
50 * parent windows effortlessly, a separate notion of 'pad' as
51 * a larger-than-screen window is no longer necessary.
52 *
53 * pminy, pminx: the area (pminy, pminx, maxy, maxx) of pad is refreshed
54 * sminy, sminx, smaxy, smaxx: the screen area to be affected.
55 */
56
57 int
prefresh(WINDOW * pad,int pminy,int pminx,int sminy,int sminx,int smaxy,int smaxx)58 prefresh(WINDOW *pad, int pminy, int pminx, int sminy,
59 int sminx, int smaxy, int smaxx)
60 {
61 return (_prefresh(wrefresh, pad, pminy, pminx, sminy,
62 sminx, smaxy, smaxx));
63 }
64
65 int
_prefresh(int (* func)(WINDOW *),WINDOW * pad,int pminy,int pminx,int sminy,int sminx,int smaxy,int smaxx)66 _prefresh(int (*func)(WINDOW *), WINDOW *pad, int pminy, int pminx,
67 int sminy, int sminx, int smaxy, int smaxx)
68 {
69
70 /*
71 * If pad->_padwin doesn't exist(meaning that this is
72 * the first call to p*refresh) create it as a derived window
73 */
74
75 if (!pad->_padwin) {
76 if ((pad->_padwin = derwin(pad, pad->_maxy, pad->_maxx,
77 0, 0)) == NULL) {
78 goto bad;
79 }
80 /* else pad->_padwin->_use_idl = TRUE; */
81
82 /*
83 * The following makes parent window to run in fast mode
84 * by creating an illusion that it has no derived windows
85 */
86
87 pad->_ndescs--;
88 }
89
90 if (_padjust(pad, pminy, pminx, sminy, sminx, smaxy, smaxx) == ERR)
91 bad:
92 return (ERR);
93
94 (*func)(pad->_padwin);
95 return (OK);
96 }
97
98 int
_padjust(WINDOW * pad,int pminy,int pminx,int sminy,int sminx,int smaxy,int smaxx)99 _padjust(WINDOW *pad, int pminy, int pminx, int sminy,
100 int sminx, int smaxy, int smaxx)
101 {
102 short prows, pcols, y;
103 WINDOW *padwin = pad->_padwin;
104 chtype **p_y, **o_y;
105
106 /* make sure the area requested to be updated is on the pad */
107
108 if ((pminy >= pad->_maxy) || (pminx >= pad->_maxx))
109 return (ERR);
110
111 /* determine the area of the pad to be updated */
112
113 if (pminy < 0)
114 pminy = 0;
115 if (pminx < 0)
116 pminx = 0;
117
118 /* determine the screen area affected */
119
120 if (sminy < 0)
121 sminy = 0;
122 if (sminx < 0)
123 sminx = 0;
124 if (smaxy < sminy)
125 smaxy = LINES - 1;
126 if (smaxx < sminx)
127 smaxx = COLS - 1;
128
129 /*
130 * Modify the area of the pad to be updated taking into
131 * consideration screen parameters.
132 */
133
134 if ((prows = (smaxy - sminy) + 1) > (y = pad->_maxy - pminy))
135 prows = y;
136 if ((pcols = (smaxx - sminx) + 1) > (y = pad->_maxx - pminx))
137 pcols = y;
138
139 if (((padwin->_cury = pad->_cury - pminy) < 0) ||
140 (padwin->_cury >= prows))
141 padwin->_cury = 0;
142 if (((padwin->_curx = pad->_curx - pminx) < 0) ||
143 (padwin->_curx >= pcols))
144 padwin->_curx = 0;
145
146 padwin->_leave = pad->_leave;
147 padwin->_use_idl = pad->_use_idl;
148
149
150 /*
151 * If padwin refers to the same derwin, return. Otherwise
152 * update the coordinates and malloc'ed areas of the padwin
153 */
154
155 if ((padwin->_begy == sminy) && (padwin->_begx == sminx) &&
156 (padwin->_maxy == prows) && (padwin->_maxx == pcols) &&
157 (padwin->_y[0] == (pad->_y[pminy] + pminx)) &&
158 (!(pad->_flags & _WINSDEL))) {
159 goto good;
160 }
161
162 /* update the coordinates of the pad */
163
164 padwin->_maxy = prows;
165 padwin->_maxx = pcols;
166 /* LINTED */
167 padwin->_begy = (short)sminy;
168 /* LINTED */
169 padwin->_begx = (short)sminx;
170 /* LINTED */
171 padwin->_pary = (short)pminy;
172 /* LINTED */
173 padwin->_parx = (short)pminx;
174
175 /* update the malloc'ed areas */
176
177 p_y = padwin->_y;
178 o_y = pad->_y;
179
180 for (y = 0; y < prows; y++, pminy++)
181 p_y[y] = o_y[pminy] + pminx;
182
183 (void) wtouchln(padwin, 0, prows, TRUE);
184 good:
185 return (OK);
186 }
187