#include <my_menu.h>

/**
 * Parse a set of items composing the menu and
 * return a pointer to the equivalent MENU.
 *
 * \param menu  a set of pair of strings ( name, descr )
 * \param x     left position
 * \param y     top position
 * \param w     window width (contents will be w-2)
 * \param h     window height (contents will be h-2)
 * \param cp_fg color pair number to be used as selected item
 * \param cp_bg color pair number to be used as normal item
 * \param cp_di color pair number to be used as disabled item
 * 
 * \return the resulting MENU or NULL on error.
 */
menu_t *create_menu( item_str_t *menu, 
		     int x, int y, int w, int h,
		     int cp_fg, int cp_bg, int cp_di )
{
  ITEM **items;
  ITEM *item;
  menu_t *m;
  item_str_t *itr;
  int n=0;

  if ( ! menu )
    return NULL;

  for ( itr = menu; itr->name != NULL; itr++ )
    n++;
  
  n++; /* null pointer terminated */
  items = (ITEM **) malloc( n * sizeof(ITEM *) );
  items[ n - 1 ] = NULL;

  n   = 0;
  itr = menu;

  for ( itr = menu, n = 0; itr->name != NULL; itr++, n++ )
    {
      items[ n ] = new_item( itr->name, itr->description );
      set_item_userptr( items[ n ], itr->func );
    }

  m = (menu_t *) malloc( sizeof( menu_t ) );

  m->menu = new_menu( items );
  m->x = x;
  m->y = y;
  m->w = w;
  m->h = h;
  m->win  = newwin( h, w, y, x );
  keypad( m->win, 1 );

  set_menu_win( m->menu, m->win );
  set_menu_sub( m->menu, derwin( m->win, h-2, 
				 w-2, 1, 1 ) );

  set_menu_fore( m->menu, COLOR_PAIR( cp_fg ) );
  set_menu_back( m->menu, COLOR_PAIR( cp_bg ) );
  set_menu_grey( m->menu, COLOR_PAIR( cp_di ) );

  wcolor_set( m->win, COLOR_PAIR( cp_bg ), NULL );
  wbkgdset( m->win, ' ' | COLOR_PAIR( cp_bg ) );
  wclear( m->win );

  box( m->win, 0, 0 );
  set_menu_format( m->menu, h-2, 1 );

  return m;
}



/**
 * Destroy menu and its items
 *
 * \param menu the menu to be destroyed
 */
void destroy_menu( menu_t *menu )
{
  ITEM **items;
  int n = 0;
  if ( ( ! menu ) || ( ! menu->menu ) )  return;

  if ( ! ( items = menu_items( menu->menu ) ) ) return;
  
  n = item_count( menu->menu );

  if ( menu->win ) delwin( menu->win );
  menu->win = NULL;
  
  free_menu( menu->menu );
  for ( ; n > 0; n--, items++ )
    {
      free_item( *items );
    }
  free( menu );
}




/* author: Gustavo Sverzut Barbieri (http://www.gustavobarbieri.com.br) */