contrib/ncurses/panel/p_above.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_above.c
  36  */
  37 #include "panel.priv.h"
  38
  39 MODULE_ID("$Id: p_above.c,v 1.9 2012/03/10 23:43:41 tom Exp $")
  40
  41 #if NCURSES_SP_FUNCS
  42 NCURSES_EXPORT(PANEL *)
  43 ground_panel(SCREEN * sp)
  44 {
  45   T((T_CALLED("ground_panel(%p)"), (void *)sp));
  46   if (sp)
  47     {
  48       struct panelhook *ph = NCURSES_SP_NAME(_nc_panelhook) (sp);
  49
  50       if (_nc_bottom_panel)     /* this is the pseudo panel */
  51         returnPanel(_nc_bottom_panel->above);
  52       else
  53         returnPanel(0);
  54     }
  55   else
  56     {
  57       if (0 == CURRENT_SCREEN)
  58         returnPanel(0);
  59       else
  60         returnPanel(ground_panel(CURRENT_SCREEN));
  61     }
  62 }
  63 #endif
  64
  65 NCURSES_EXPORT(PANEL *)
  66 panel_above(const PANEL * pan)
  67 {
  68   PANEL *result;
  69
  70   T((T_CALLED("panel_above(%p)"), (const void *)pan));
  71   if (pan)
  72     result = pan->above;
  73   else
  74     {
  75 #if NCURSES_SP_FUNCS
  76       result = ground_panel(CURRENT_SCREEN);
  77 #else
  78       /* if top and bottom are equal, we have no or only the pseudo panel;
  79          if not, we return the panel above the pseudo panel */
  80       result = EMPTY_STACK()? (PANEL *) 0 : _nc_bottom_panel->above;
  81 #endif
  82     }
  83   returnPanel(result);
  84 }