panel/p_below.c

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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1995                    *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Juergen Pfeifer                         1997-1999,2008          *
  33  ****************************************************************************/
  34
  35 /* p_below.c
  36  */
  37 #include "panel.priv.h"
  38
  39 MODULE_ID("$Id: p_below.c,v 1.8 2010/01/23 21:22:15 tom Exp $")
  40
  41 #if NCURSES_SP_FUNCS
  42 NCURSES_EXPORT(PANEL *)
  43 ceiling_panel(SCREEN * sp)
  44 {
  45   T((T_CALLED("ceiling_panel(%p)"), sp));
  46   if (sp)
  47     {
  48       struct panelhook *ph = NCURSES_SP_NAME(_nc_panelhook) (sp);
  49
  50       /* if top and bottom are equal, we have no or only the pseudo panel */
  51       returnPanel(EMPTY_STACK()? (PANEL *) 0 : _nc_top_panel);
  52     }
  53   else
  54     {
  55       if (0 == CURRENT_SCREEN)
  56         returnPanel(0);
  57       else
  58         returnPanel(ceiling_panel(CURRENT_SCREEN));
  59     }
  60 }
  61 #endif
  62
  63 NCURSES_EXPORT(PANEL *)
  64 panel_below(const PANEL * pan)
  65 {
  66   PANEL *result;
  67
  68   T((T_CALLED("panel_below(%p)"), (const void *)pan));
  69   if (pan)
  70     {
  71       GetHook(pan);
  72       /* we must not return the pseudo panel */
  73       result = Is_Pseudo(pan->below) ? (PANEL *) 0 : pan->below;
  74     }
  75   else
  76     {
  77 #if NCURSES_SP_FUNCS
  78       result = ceiling_panel(CURRENT_SCREEN);
  79 #else
  80       /* if top and bottom are equal, we have no or only the pseudo panel */
  81       result = EMPTY_STACK()? (PANEL *) 0 : _nc_top_panel;
  82 #endif
  83     }
  84   returnPanel(result);
  85 }