prefresh.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
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 (c) 1995-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/* LINTLIBRARY */
30
31/*
32 * prefresh.c
33 *
34 * XCurses Library
35 *
36 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
37 *
38 */
39
40#ifdef M_RCSID
41#ifndef lint
42static char rcsID[] =
43"$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
44"libxcurses/src/libc/xcurses/rcs/prefresh.c 1.4 1998/06/03 16:06:14 "
45"cbates Exp $";
46#endif
47#endif
48
49#include <private.h>
50
51/*
52 * Update newscr with the given pad then display to the terminal.
53 */
54int
55prefresh(WINDOW *w, int pminr, int pminc, int sminr, int sminc,
56	int smaxr, int smaxc)
57{
58	int	code;
59
60	code = pnoutrefresh(w, pminr, pminc, sminr, sminc, smaxr, smaxc);
61	if (code == OK)
62		code = doupdate();
63
64	return (code);
65}
66
67/*
68 * Update newscr with the given pad.  This allows newscr to
69 * be updated with several windows before doing a doupdate().
70 *
71 * MKS extension permits windows that are not pads to be refreshed
72 * using this function.
73 */
74int
75pnoutrefresh(WINDOW *pad, int pminr, int pminc, int sminr, int sminc,
76	int smaxr, int smaxc)
77{
78	WINDOW	*ns;
79	int	row, dy, dx;
80
81	ns = __m_screen->_newscr;
82
83	/* Adjust regions to be within bounds. */
84	if (pminr < 0)
85		pminr = 0;
86	if (pminc < 0)
87		pminc = 0;
88	if (sminr < 0)
89		sminr = 0;
90	if (sminc < 0)
91		sminc = 0;
92	if (ns->_maxy <= smaxr)
93		smaxr = ns->_maxy-1;
94	if (ns->_maxx <= smaxc)
95		smaxc = ns->_maxx-1;
96
97	if (pad->_maxy <= pminr || pad->_maxx <= pminc ||
98		smaxr < sminr || smaxc < sminc)
99		return (ERR);
100
101	/* Clear displayed region. */
102	for (row = sminr; row < smaxr; ++row) {
103		(void) __m_cc_erase(ns, row, sminc, row, smaxc);
104	}
105
106	/*
107	 * Determine the proper maximums in case smaxr and smaxc mapped
108	 * beyond the bottom and right-hand edges of the pad.
109	 */
110	if (pad->_maxx <= pminc + smaxc-sminc + 1)
111		smaxc = sminc + pad->_maxx - 1 - pminc;
112	if (pad->_maxy <= pminr + smaxr-sminr + 1)
113		smaxr = sminr + pad->_maxy - 1 - pminr;
114
115	/* Remember refresh region (inclusive). */
116	pad->_refy = (short) pminr;
117	pad->_refx = (short) pminc;
118	pad->_sminy = (short) sminr;
119	pad->_sminx = (short) sminc;
120	pad->_smaxy = (short) smaxr;
121	pad->_smaxx = (short) smaxc;
122
123	(void) copywin(pad, ns, pminr, pminc, sminr, sminc, smaxr, smaxc, 0);
124
125	/* Last refreshed window controls W_LEAVE_CURSOR flag. */
126	ns->_flags &= ~W_LEAVE_CURSOR;
127	ns->_flags |= pad->_flags &
128		(W_CLEAR_WINDOW | W_REDRAW_WINDOW | W_LEAVE_CURSOR);
129	pad->_flags &= ~(W_CLEAR_WINDOW | W_REDRAW_WINDOW);
130
131	/* Figure out where to leave the cursor. */
132	dy = pad->_cury - pminr + pad->_begy;
133	dx = pad->_curx - pminc + pad->_begx;
134
135	ns->_cury = (dy < 0) ? 0 :
136		((ns->_maxy <= dy) ? ns->_maxy - 1 : (short) dy);
137	ns->_curx = (dx < 0) ? 0 :
138		((ns->_maxx <= dx) ? ns->_maxx - 1 : (short) dx);
139
140	return (OK);
141}
142