contrib/ncurses/panel/p_new.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               *
  33  *     and: Thomas E. Dickey                        2000-on                 *
  34  ****************************************************************************/
  35
  36 /* p_new.c
  37  * Creation of a new panel
  38  */
  39 #include "panel.priv.h"
  40
  41 MODULE_ID("$Id: p_new.c,v 1.16 2010/01/23 21:22:16 tom Exp $")
  42
  43 #ifdef TRACE
  44 static char *stdscr_id;
  45 static char *new_id;
  46 #endif
  47
  48 /*+-------------------------------------------------------------------------
  49   Get root (i.e. stdscr's) panel.
  50   Establish the pseudo panel for stdscr if necessary.
  51 --------------------------------------------------------------------------*/
  52 static PANEL *
  53 root_panel(NCURSES_SP_DCL0)
  54 {
  55 #if NCURSES_SP_FUNCS
  56   struct panelhook *ph = NCURSES_SP_NAME(_nc_panelhook) (sp);
  57
  58 #elif NO_LEAKS
  59   struct panelhook *ph = _nc_panelhook();
  60 #endif
  61
  62   if (_nc_stdscr_pseudo_panel == (PANEL *) 0)
  63     {
  64
  65       assert(SP_PARM && SP_PARM->_stdscr && !_nc_bottom_panel && !_nc_top_panel);
  66 #if NO_LEAKS
  67       ph->destroy = del_panel;
  68 #endif
  69       _nc_stdscr_pseudo_panel = typeMalloc(PANEL, 1);
  70       if (_nc_stdscr_pseudo_panel != 0)
  71         {
  72           PANEL *pan = _nc_stdscr_pseudo_panel;
  73           WINDOW *win = SP_PARM->_stdscr;
  74
  75           pan->win = win;
  76           pan->below = (PANEL *) 0;
  77           pan->above = (PANEL *) 0;
  78 #ifdef TRACE
  79           if (!stdscr_id)
  80             stdscr_id = strdup("stdscr");
  81           pan->user = stdscr_id;
  82 #else
  83           pan->user = (void *)0;
  84 #endif
  85           _nc_bottom_panel = _nc_top_panel = pan;
  86         }
  87     }
  88   return _nc_stdscr_pseudo_panel;
  89 }
  90
  91 NCURSES_EXPORT(PANEL *)
  92 new_panel(WINDOW *win)
  93 {
  94   PANEL *pan = (PANEL *) 0;
  95
  96   GetWindowHook(win);
  97
  98   T((T_CALLED("new_panel(%p)"), (void *)win));
  99
 100   if (!win)
 101     returnPanel(pan);
 102
 103   if (!_nc_stdscr_pseudo_panel)
 104     (void)root_panel(NCURSES_SP_ARG);
 105   assert(_nc_stdscr_pseudo_panel);
 106
 107   if (!(win->_flags & _ISPAD) && (pan = typeMalloc(PANEL, 1)))
 108     {
 109       pan->win = win;
 110       pan->above = (PANEL *) 0;
 111       pan->below = (PANEL *) 0;
 112 #ifdef TRACE
 113       if (!new_id)
 114         new_id = strdup("new");
 115       pan->user = new_id;
 116 #else
 117       pan->user = (char *)0;
 118 #endif
 119       (void)show_panel(pan);
 120     }
 121   returnPanel(pan);
 122 }