// Adapted into a real plugin from
// <http://javascript-array.com/scripts/jquery_simple_drop_down_menu/>

$.fn.dropdown = function (options) {
  var settings = jQuery.extend({
    timeout: 0.2
  }, options);
  var closetimer = null;
  var ddmenuitem = null;

  $(this).children('li').hover(dropdown_open, dropdown_timer);
  document.onclick = dropdown_close;

  function dropdown_open()
  {
    dropdown_canceltimer();
    dropdown_close();
    ddmenuitem = $('ul', this).css({'display': 'block', 'z-index':10000});
  }

  function dropdown_close() {
    if (ddmenuitem) {
      ddmenuitem.css('display', 'none');
    }
  }

  function dropdown_timer() {
    closetimer = window.setTimeout(dropdown_close, settings.timeout * 1000);
  }

  function dropdown_canceltimer() {
    if (closetimer) {
      window.clearTimeout(closetimer);
      closetimer = null;
    }
  }

  return this;
}

$.fn.dataTableExt.oPagination.full_numbers1 = {
	/*
	 * Function: oPagination.four_button.fnInit
	 * Purpose:  Initalise dom elements required for pagination with a list of the pages
	 * Returns:  -
	 * Inputs:   object:oSettings - dataTables settings object
	 *           node:nPaging - the DIV which contains this pagination control
	 *           function:fnCallbackDraw - draw function which must be called on update
	 */
	"fnInit": function ( oSettings, nPaging, fnCallbackDraw )
	{
		nFirst = document.createElement( 'span' );
		nPrevious = document.createElement( 'span' );
		nNext = document.createElement( 'span' );
		nLast = document.createElement( 'span' );
		nPageNo = document.createElement( 'span' );
		
		nFirst.appendChild( document.createTextNode( oSettings.oLanguage.oPaginate.sFirst ) );
		nPrevious.appendChild( document.createTextNode( oSettings.oLanguage.oPaginate.sPrevious ) );
		nNext.appendChild( document.createTextNode( oSettings.oLanguage.oPaginate.sNext ) );
		nLast.appendChild( document.createTextNode( oSettings.oLanguage.oPaginate.sLast ) );
		nPageNo.appendChild( document.createTextNode( oSettings.oLanguage.oPaginate.iFullNumbersShowPages ) );
		
		
		
		nFirst.className = "paginate_button first";
		nPrevious.className = "paginate_button previous";
		nNext.className="paginate_button next";
		nLast.className = "paginate_button last";
		
		nPaging.appendChild( nFirst );
		nPaging.appendChild( nPrevious );
		nPaging.appendChild( nNext );
		nPaging.appendChild( nLast );
		
		$(nFirst).click( function () {
			oSettings.oApi._fnPageChange( oSettings, "first" );
			fnCallbackDraw( oSettings );
		} );
		
		$(nPrevious).click( function() {
			oSettings.oApi._fnPageChange( oSettings, "previous" );
			fnCallbackDraw( oSettings );
		} );
		
		$(nNext).click( function() {
			oSettings.oApi._fnPageChange( oSettings, "next" );
			fnCallbackDraw( oSettings );
		} );
		
		$(nLast).click( function() {
			oSettings.oApi._fnPageChange( oSettings, "last" );
			fnCallbackDraw( oSettings );
		} );
		
		/* Disallow text selection */
		$(nFirst).bind( 'selectstart', function () { return false; } );
		$(nPrevious).bind( 'selectstart', function () { return false; } );
		$(nNext).bind( 'selectstart', function () { return false; } );
		$(nLast).bind( 'selectstart', function () { return false; } );
	},
	
	/*
	 * Function: oPagination.four_button.fnUpdate
	 * Purpose:  Update the list of page buttons shows
	 * Returns:  -
	 * Inputs:   object:oSettings - dataTables settings object
	 *           function:fnCallbackDraw - draw function which must be called on update
	 */
	"fnUpdate": function ( oSettings, fnCallbackDraw )
	{
		if ( !oSettings.aanFeatures.p )
		{
			return;
		}
		
		/* Loop over each instance of the pager */
		var an = oSettings.aanFeatures.p;
		for ( var i=0, iLen=an.length ; i<iLen ; i++ )
		{
			var buttons = an[i].getElementsByTagName('span');
			if ( oSettings._iDisplayStart === 0 )
			{
				buttons[0].className = "previous paginate_button";
				buttons[1].className = "previous paginate_button";
			}
			else
			{
				buttons[0].className = "previous paginate_button";
				buttons[1].className = "previous paginate_button";
			}
			
			if ( oSettings.fnDisplayEnd() == oSettings.fnRecordsDisplay() )
			{
				buttons[2].className = "next paginate_button";
				buttons[3].className = "last paginate_button";
			}
			else
			{
				buttons[2].className = "next paginate_button";
				buttons[3].className = "last paginate_button";
			}
		}
	}
};