1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*	Copyright (c) 1988 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26/*
27 *      Copyright (c) 1997, by Sun Microsystems, Inc.
28 *      All rights reserved.
29 */
30
31/* A panels subsystem built on curses--Delete panel routines */
32
33#pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.3	*/
34
35/*LINTLIBRARY*/
36
37#include <sys/types.h>
38#include <stdlib.h>
39#include <curses.h>
40#include "private.h"
41
42/* hide_panel - Unlink a panel from the pile and remove it from the screen. */
43int
44hide_panel(PANEL *panel)
45{
46	if (!panel)
47		return (ERR);
48
49	/* It is ok to hide a panel that is already hidden. */
50
51	if (panel == panel -> below)
52		return (OK);
53
54	/* unlink panel */
55
56	_remove_overlap(panel);
57	if (panel == _Bottom_panel)
58		_Bottom_panel = panel -> above;
59	else
60		panel -> below -> above = panel -> above;
61
62	if (panel == _Top_panel)
63		_Top_panel = panel -> below;
64	else
65		panel -> above -> below = panel -> below;
66
67	_Panel_cnt--;
68	panel -> below = panel;
69	return (OK);
70}
71
72/*
73 * del_panel - Delete a panel from the pile
74 * and free all memory associated with it.
75 */
76int
77del_panel(PANEL *panel)
78{
79	return ((hide_panel(panel) == OK) ? free(panel), OK : ERR);
80}
81
82/*
83 *  _remove_overlap
84 * Remove all references to a panel from the obscured lists of all panels.
85 * Also remove all obscured nodes from the given panel.  This routine
86 * touches the appropriate places to ensure that everybody is properly
87 * updated.
88 */
89void
90_remove_overlap(PANEL *panel)
91{
92	PANEL		*pnl;
93	_obscured_list	*obs;
94	_obscured_list	*prev_obs;
95
96	/* Make sure that the background gets updated */
97
98	(void) touchline(stdscr, panel->wstarty,
99	    panel->wendy - panel->wstarty + 1);
100
101	/* Remove all references to the panel from the remaining panels */
102
103	for (pnl = _Bottom_panel; pnl != panel; pnl = pnl->above) {
104		if (obs = _unlink_obs(pnl, panel))
105			_free_overlap(obs);
106	}
107
108	/* delete the obscured list from the panel */
109
110	if ((obs = panel -> obscured) != 0) {
111		do {
112			prev_obs = obs;
113			obs = obs -> next;
114			_free_overlap(prev_obs);
115		}
116		while (obs != panel -> obscured);
117		panel -> obscured = 0;
118	}
119}
120