usr/src/lib/libeti/panel/common/delete.c

   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. */
  43 int
  44 hide_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  */
  76 int
  77 del_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  */
  89 void
  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 }