panel/p_above.c

/****************************************************************************
 * Copyright 2020 Thomas E. Dickey                                          *
 * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
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/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1995                    *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     and: Juergen Pfeifer                         1997-1999,2008          *
 ****************************************************************************/

/* p_above.c
 */
#include "panel.priv.h"

MODULE_ID("$Id: p_above.c,v 1.11 2020/05/24 01:40:20 anonymous.maarten Exp $")

#if NCURSES_SP_FUNCS
PANEL_EXPORT(PANEL *)
ground_panel(SCREEN * sp)
{
  T((T_CALLED("ground_panel(%p)"), (void *)sp));
  if (sp)
    {
      struct panelhook *ph = NCURSES_SP_NAME(_nc_panelhook) (sp);

      if (_nc_bottom_panel)	/* this is the pseudo panel */
	returnPanel(_nc_bottom_panel->above);
      else
	returnPanel(0);
    }
  else
    {
      if (0 == CURRENT_SCREEN)
	returnPanel(0);
      else
	returnPanel(ground_panel(CURRENT_SCREEN));
    }
}
#endif

PANEL_EXPORT(PANEL *)
panel_above(const PANEL * pan)
{
  PANEL *result;

  T((T_CALLED("panel_above(%p)"), (const void *)pan));
  if (pan)
    result = pan->above;
  else
    {
#if NCURSES_SP_FUNCS
      result = ground_panel(CURRENT_SCREEN);
#else
      /* if top and bottom are equal, we have no or only the pseudo panel;
         if not, we return the panel above the pseudo panel */
      result = EMPTY_STACK()? (PANEL *) 0 : _nc_bottom_panel->above;
#endif
    }
  returnPanel(result);
}