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 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 /*LINTLIBRARY*/
43
44 #include <sys/types.h>
45 #include "curses_inc.h"
46
47 /* Scroll the given window up/down n lines. */
48 int
wscrl(WINDOW * win,int n)49 wscrl(WINDOW *win, int n)
50 {
51 short curx, cury;
52 bool savimmed, savsync;
53
54 #ifdef DEBUG
55 if (outf)
56 if (win == stdscr)
57 fprintf(outf, "scroll(stdscr, %d)\n", n);
58 else
59 if (win == curscr)
60 fprintf(outf, "scroll(curscr, %d)\n", n);
61 else
62 fprintf(outf, "scroll(%x, %d)\n", win, n);
63 #endif /* DEBUG */
64 if (!win->_scroll || (win->_flags & _ISPAD))
65 return (ERR);
66
67 savimmed = win->_immed;
68 savsync = win->_sync;
69 win->_immed = win->_sync = FALSE;
70
71 curx = win->_curx; cury = win->_cury;
72
73 if (cury >= win->_tmarg && cury <= win->_bmarg)
74 win->_cury = win->_tmarg;
75 else
76 win->_cury = 0;
77
78 (void) winsdelln(win, -n);
79 win->_curx = curx;
80 win->_cury = cury;
81
82 win->_sync = savsync;
83
84 if (win->_sync)
85 wsyncup(win);
86
87 return ((win->_immed = savimmed) ? wrefresh(win) : OK);
88 }
89