xref: /freebsd/contrib/ncurses/panel/p_show.c (revision a1a4f1a0d87b594d3f17a97dc0127eec1417e6f6)
1 /****************************************************************************
2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3  *                                                                          *
4  * Permission is hereby granted, free of charge, to any person obtaining a  *
5  * copy of this software and associated documentation files (the            *
6  * "Software"), to deal in the Software without restriction, including      *
7  * without limitation the rights to use, copy, modify, merge, publish,      *
8  * distribute, distribute with modifications, sublicense, and/or sell       *
9  * copies of the Software, and to permit persons to whom the Software is    *
10  * furnished to do so, subject to the following conditions:                 *
11  *                                                                          *
12  * The above copyright notice and this permission notice shall be included  *
13  * in all copies or substantial portions of the Software.                   *
14  *                                                                          *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22  *                                                                          *
23  * Except as contained in this notice, the name(s) of the above copyright   *
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28 
29 /****************************************************************************
30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1995                    *
31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32  ****************************************************************************/
33 
34 /* p_show.c
35  * Place a panel on top of the stack; may already be in the stack
36  */
37 #include "panel.priv.h"
38 
39 MODULE_ID("$Id: p_show.c,v 1.2 1998/02/11 12:14:01 tom Exp $")
40 
41 static void
42 panel_link_top(PANEL *pan)
43 {
44 #ifdef TRACE
45   dStack("<lt%d>",1,pan);
46   if(_nc_panel_is_linked(pan))
47     return;
48 #endif
49 
50   pan->above = (PANEL *)0;
51   pan->below = (PANEL *)0;
52   if(_nc_top_panel)
53     {
54       _nc_top_panel->above = pan;
55       pan->below = _nc_top_panel;
56     }
57   _nc_top_panel = pan;
58   if(!_nc_bottom_panel)
59     _nc_bottom_panel = pan;
60   _nc_calculate_obscure();
61   dStack("<lt%d>",9,pan);
62 }
63 
64 int
65 show_panel(PANEL *pan)
66 {
67   if(!pan)
68     return(ERR);
69   if(pan == _nc_top_panel)
70     return(OK);
71   dBug(("--> show_panel %s", USER_PTR(pan->user)));
72   if(_nc_panel_is_linked(pan))
73     (void)hide_panel(pan);
74   panel_link_top(pan);
75   return(OK);
76 }
77