xref: /freebsd/contrib/ncurses/panel/p_hide.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      *
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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_hide.c
35  * Remove a panel from the stack
36  */
37 #include "panel.priv.h"
38 
39 MODULE_ID("$Id: p_hide.c,v 1.2 1998/02/11 12:14:01 tom Exp $")
40 
41 /*+-------------------------------------------------------------------------
42 	__panel_unlink(pan) - unlink panel from stack
43 --------------------------------------------------------------------------*/
44 static void
45 __panel_unlink(PANEL *pan)
46 {
47   PANEL *prev;
48   PANEL *next;
49 
50 #ifdef TRACE
51   dStack("<u%d>",1,pan);
52   if(!_nc_panel_is_linked(pan))
53     return;
54 #endif
55 
56   _nc_override(pan,P_TOUCH);
57   _nc_free_obscure(pan);
58 
59   prev = pan->below;
60   next = pan->above;
61 
62   if(prev)
63     { /* if non-zero, we will not update the list head */
64       prev->above = next;
65       if(next)
66 	next->below = prev;
67     }
68   else if(next)
69     next->below = prev;
70   if(pan == _nc_bottom_panel)
71     _nc_bottom_panel = next;
72   if(pan == _nc_top_panel)
73     _nc_top_panel = prev;
74 
75   _nc_calculate_obscure();
76 
77   pan->above = (PANEL *)0;
78   pan->below = (PANEL *)0;
79   dStack("<u%d>",9,pan);
80 }
81 
82 int
83 hide_panel(register PANEL *pan)
84 {
85   if(!pan)
86     return(ERR);
87 
88   dBug(("--> hide_panel %s", USER_PTR(pan->user)));
89 
90   if(!_nc_panel_is_linked(pan))
91     {
92       pan->above = (PANEL *)0;
93       pan->below = (PANEL *)0;
94       return(ERR);
95     }
96 
97   __panel_unlink(pan);
98   return(OK);
99 }
100