xref: /onnv-gate/usr/src/lib/libcurses/screen/ripoffline.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28*0Sstevel@tonic-gate /*	  All Rights Reserved	*/
29*0Sstevel@tonic-gate 
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate  * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate  * The Regents of the University of California
33*0Sstevel@tonic-gate  * All Rights Reserved
34*0Sstevel@tonic-gate  *
35*0Sstevel@tonic-gate  * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate  * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate  * contributors.
38*0Sstevel@tonic-gate  */
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate /*LINTLIBRARY*/
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate /*
45*0Sstevel@tonic-gate  * This routine is used by initialization routines. It sets it up
46*0Sstevel@tonic-gate  * such that a line is removed from the user's screen by initscr. This
47*0Sstevel@tonic-gate  * function must be called BEFORE initscr. It works by leaving a cookie
48*0Sstevel@tonic-gate  * which tells initscr to reduce the size of stdscr by one for each line
49*0Sstevel@tonic-gate  * ripped off. This routine has been generalized so that other applications
50*0Sstevel@tonic-gate  * can make use of it in a straightforward manner.
51*0Sstevel@tonic-gate  */
52*0Sstevel@tonic-gate 
53*0Sstevel@tonic-gate #include <sys/types.h>
54*0Sstevel@tonic-gate #include "curses_inc.h"
55*0Sstevel@tonic-gate 
56*0Sstevel@tonic-gate static	struct _ripdef
57*0Sstevel@tonic-gate {
58*0Sstevel@tonic-gate 	int line;
59*0Sstevel@tonic-gate 	int (*initfunction)(WINDOW *, int);
60*0Sstevel@tonic-gate } _ripstruct[5];
61*0Sstevel@tonic-gate 
62*0Sstevel@tonic-gate static char _ripcounter;
63*0Sstevel@tonic-gate 
64*0Sstevel@tonic-gate static	void
_init_rip_func(void)65*0Sstevel@tonic-gate _init_rip_func(void)
66*0Sstevel@tonic-gate {
67*0Sstevel@tonic-gate 	int	i, flag;
68*0Sstevel@tonic-gate 
69*0Sstevel@tonic-gate 	for (i = 0; i < _ripcounter; i++) {
70*0Sstevel@tonic-gate 		LINES = --SP->lsize;
71*0Sstevel@tonic-gate /*
72*0Sstevel@tonic-gate  * We don't need to check for newwin returning NULL because even if
73*0Sstevel@tonic-gate  * we did and broke from the for loop, the application's initfunction
74*0Sstevel@tonic-gate  * would not be called and they would have a NULL window pointer.  Their
75*0Sstevel@tonic-gate  * code would then blow up if they don't check it anyway.  Therefore,
76*0Sstevel@tonic-gate  * we can send in the newwin and their code has to check for NULL in either
77*0Sstevel@tonic-gate  * case.
78*0Sstevel@tonic-gate  *
79*0Sstevel@tonic-gate  * NOTE:  The application has the responsibilty to do a delwin !!!
80*0Sstevel@tonic-gate  */
81*0Sstevel@tonic-gate 		(*_ripstruct[i].initfunction) (newwin(1, COLS,
82*0Sstevel@tonic-gate 		    ((flag = _ripstruct[i].line) > 0) ? 0 : LINES, 0), COLS);
83*0Sstevel@tonic-gate 		if (flag > 0)
84*0Sstevel@tonic-gate 		    SP->Yabove++;
85*0Sstevel@tonic-gate 	}
86*0Sstevel@tonic-gate 	_ripcounter = 0;
87*0Sstevel@tonic-gate }
88*0Sstevel@tonic-gate 
89*0Sstevel@tonic-gate int
ripoffline(int line,int (* initfunction)(WINDOW *,int))90*0Sstevel@tonic-gate ripoffline(int line, int (*initfunction)(WINDOW *, int))
91*0Sstevel@tonic-gate {
92*0Sstevel@tonic-gate 	if (_ripcounter < 5) {
93*0Sstevel@tonic-gate 		_ripstruct[_ripcounter].line = line;
94*0Sstevel@tonic-gate 		_ripstruct[_ripcounter++].initfunction = initfunction;
95*0Sstevel@tonic-gate 	}
96*0Sstevel@tonic-gate 	_rip_init = _init_rip_func;
97*0Sstevel@tonic-gate 	return (OK);
98*0Sstevel@tonic-gate }
99