1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2009,2010 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 * and: Juergen Pfeifer 1997-1999 *
34 * and: Thomas E. Dickey 2000-on *
35 ****************************************************************************/
36
37 /* p_new.c
38 * Creation of a new panel
39 */
40 #include "panel.priv.h"
41
42 MODULE_ID("$Id: p_new.c,v 1.24 2021/10/23 15:12:06 tom Exp $")
43
44 #ifdef TRACE
45 static char *stdscr_id;
46 static char *new_id;
47
48 static PANEL *
AllocPanel(const char * name)49 AllocPanel(const char *name)
50 {
51 PANEL *result = typeMalloc(PANEL, 1);
52
53 _tracef("create :%s %p", name, (void *)result);
54 return result;
55 }
56 #define InitUser(name) \
57 if (!name ## _id) \
58 name ## _id = strdup(#name); \
59 pan->user = name ## _id; \
60 _tracef("create :user_ptr %p", pan->user)
61 #else
62 #define AllocPanel(name) typeMalloc(PANEL, 1)
63 #define InitUser(name) \
64 pan->user = (void *)0
65 #endif
66
67 /*+-------------------------------------------------------------------------
68 Get root (i.e. stdscr's) panel.
69 Establish the pseudo panel for stdscr if necessary.
70 --------------------------------------------------------------------------*/
71 static PANEL *
root_panel(NCURSES_SP_DCL0)72 root_panel(NCURSES_SP_DCL0)
73 {
74 #if NCURSES_SP_FUNCS
75 struct panelhook *ph = NCURSES_SP_NAME(_nc_panelhook) (sp);
76
77 #elif NO_LEAKS
78 struct panelhook *ph = _nc_panelhook();
79 #endif
80
81 if (_nc_stdscr_pseudo_panel == (PANEL *)0)
82 {
83
84 assert(SP_PARM && SP_PARM->_stdscr && !_nc_bottom_panel && !_nc_top_panel);
85 #if NO_LEAKS
86 ph->destroy = del_panel;
87 #endif
88 _nc_stdscr_pseudo_panel = AllocPanel("root_panel");
89 if (_nc_stdscr_pseudo_panel != 0)
90 {
91 PANEL *pan = _nc_stdscr_pseudo_panel;
92 WINDOW *win = SP_PARM->_stdscr;
93
94 pan->win = win;
95 pan->below = (PANEL *)0;
96 pan->above = (PANEL *)0;
97 InitUser(stdscr);
98 _nc_bottom_panel = _nc_top_panel = pan;
99 }
100 }
101 return _nc_stdscr_pseudo_panel;
102 }
103
104 PANEL_EXPORT(PANEL *)
new_panel(WINDOW * win)105 new_panel(WINDOW *win)
106 {
107 PANEL *pan = (PANEL *)0;
108
109 GetWindowHook(win);
110
111 T((T_CALLED("new_panel(%p)"), (void *)win));
112
113 if (!win)
114 returnPanel(pan);
115
116 if (!_nc_stdscr_pseudo_panel)
117 (void)root_panel(NCURSES_SP_ARG);
118 assert(_nc_stdscr_pseudo_panel);
119
120 if ((pan = AllocPanel("new_panel")) != NULL)
121 {
122 pan->win = win;
123 pan->above = (PANEL *)0;
124 pan->below = (PANEL *)0;
125 InitUser(new);
126 (void)show_panel(pan);
127 }
128 returnPanel(pan);
129 }
130