p_new.c revision 76726 
1/****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
3 *                                                                          *
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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,   *
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21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
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26 * authorization.                                                           *
27 ****************************************************************************/
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_new.c
35 * Creation of a new panel
36 */
37#include "panel.priv.h"
38
39MODULE_ID("$Id: p_new.c,v 1.6 2000/12/10 02:20:44 tom Exp $")
40
41#ifdef TRACE
42static char* stdscr_id;
43static char* new_id;
44#endif
45
46/*+-------------------------------------------------------------------------
47  Get root (i.e. stdscr's) panel.
48  Establish the pseudo panel for stdscr if necessary.
49--------------------------------------------------------------------------*/
50static PANEL*
51root_panel(void)
52{
53  if(_nc_stdscr_pseudo_panel == (PANEL*)0)
54    {
55
56      assert(stdscr && !_nc_bottom_panel && !_nc_top_panel);
57      _nc_stdscr_pseudo_panel = (PANEL*)malloc(sizeof(PANEL));
58      if (_nc_stdscr_pseudo_panel != 0) {
59	PANEL* pan  = _nc_stdscr_pseudo_panel;
60	WINDOW* win = stdscr;
61	pan->win = win;
62	pan->below   = (PANEL*)0;
63	pan->above   = (PANEL*)0;
64#ifdef TRACE
65	if (!stdscr_id)
66	  stdscr_id = strdup("stdscr");
67	pan->user = stdscr_id;
68#else
69	pan->user = (void*)0;
70#endif
71	_nc_bottom_panel = _nc_top_panel = pan;
72      }
73    }
74  return _nc_stdscr_pseudo_panel;
75}
76
77NCURSES_EXPORT(PANEL *)
78new_panel (WINDOW *win)
79{
80  PANEL *pan = (PANEL*)0;
81
82  if (!win)
83    return(pan);
84
85  if (!_nc_stdscr_pseudo_panel)
86    (void)root_panel();
87  assert(_nc_stdscr_pseudo_panel);
88
89  if (!(win->_flags & _ISPAD) && (pan = (PANEL*)malloc(sizeof(PANEL))))
90    {
91      pan->win = win;
92      pan->above = (PANEL *)0;
93      pan->below = (PANEL *)0;
94#ifdef TRACE
95      if (!new_id)
96	new_id = strdup("new");
97      pan->user = new_id;
98#else
99      pan->user = (char *)0;
100#endif
101      (void)show_panel(pan);
102    }
103  return(pan);
104}
105