text: /*! ColReorder 1.5.3
   * ©2010-2020 SpryMedia Ltd - datatables.net/license
   */
  
  /**
   * @summary     ColReorder
   * @description Provide the ability to reorder columns in a DataTable
   * @version     1.5.3
   * @file        dataTables.colReorder.js
   * @author      SpryMedia Ltd (www.sprymedia.co.uk)
   * @contact     www.sprymedia.co.uk/contact
   * @copyright   Copyright 2010-2020 SpryMedia Ltd.
   *
   * This source file is free software, available under the following license:
   *   MIT license - http://datatables.net/license/mit
   *
   * This source file is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
   *
   * For details please refer to: http://www.datatables.net
   */
  (function( factory ){
  	if ( typeof define === 'function' && define.amd ) {
  		// AMD
  		define( ['jquery', 'datatables.net'], function ( $ ) {
  			return factory( $, window, document );
  		} );
  	}
  	else if ( typeof exports === 'object' ) {
  		// CommonJS
  		module.exports = function (root, $) {
  			if ( ! root ) {
  				root = window;
  			}
  
  			if ( ! $ || ! $.fn.dataTable ) {
  				$ = require('datatables.net')(root, $).$;
  			}
  
  			return factory( $, root, root.document );
  		};
  	}
  	else {
  		// Browser
  		factory( jQuery, window, document );
  	}
  }(function( $, window, document, undefined ) {
  'use strict';
  var DataTable = $.fn.dataTable;
  
  
  /**
   * Switch the key value pairing of an index array to be value key (i.e. the old value is now the
   * key). For example consider [ 2, 0, 1 ] this would be returned as [ 1, 2, 0 ].
   *  @method  fnInvertKeyValues
   *  @param   array aIn Array to switch around
   *  @returns array
   */
  function fnInvertKeyValues( aIn )
  {
  	var aRet=[];
  	for ( var i=0, iLen=aIn.length ; i<iLen ; i++ )
  	{
  		aRet[ aIn[i] ] = i;
  	}
  	return aRet;
  }
  
  
  /**
   * Modify an array by switching the position of two elements
   *  @method  fnArraySwitch
   *  @param   array aArray Array to consider, will be modified by reference (i.e. no return)
   *  @param   int iFrom From point
   *  @param   int iTo Insert point
   *  @returns void
   */
  function fnArraySwitch( aArray, iFrom, iTo )
  {
  	var mStore = aArray.splice( iFrom, 1 )[0];
  	aArray.splice( iTo, 0, mStore );
  }
  
  
  /**
   * Switch the positions of nodes in a parent node (note this is specifically designed for
   * table rows). Note this function considers all element nodes under the parent!
   *  @method  fnDomSwitch
   *  @param   string sTag Tag to consider
   *  @param   int iFrom Element to move
   *  @param   int Point to element the element to (before this point), can be null for append
   *  @returns void
   */
  function fnDomSwitch( nParent, iFrom, iTo )
  {
  	var anTags = [];
  	for ( var i=0, iLen=nParent.childNodes.length ; i<iLen ; i++ )
  	{
  		if ( nParent.childNodes[i].nodeType == 1 )
  		{
  			anTags.push( nParent.childNodes[i] );
  		}
  	}
  	var nStore = anTags[ iFrom ];
  
  	if ( iTo !== null )
  	{
  		nParent.insertBefore( nStore, anTags[iTo] );
  	}
  	else
  	{
  		nParent.appendChild( nStore );
  	}
  }
  
  
  /**
   * Plug-in for DataTables which will reorder the internal column structure by taking the column
   * from one position (iFrom) and insert it into a given point (iTo).
   *  @method  $.fn.dataTableExt.oApi.fnColReorder
   *  @param   object oSettings DataTables settings object - automatically added by DataTables!
   *  @param   int iFrom Take the column to be repositioned from this point
   *  @param   int iTo and insert it into this point
   *  @param   bool drop Indicate if the reorder is the final one (i.e. a drop)
   *    not a live reorder
   *  @param   bool invalidateRows speeds up processing if false passed
   *  @returns void
   */
  $.fn.dataTableExt.oApi.fnColReorder = function ( oSettings, iFrom, iTo, drop, invalidateRows )
  {
  	var i, iLen, j, jLen, jen, iCols=oSettings.aoColumns.length, nTrs, oCol;
  	var attrMap = function ( obj, prop, mapping ) {
  		if ( ! obj[ prop ] || typeof obj[ prop ] === 'function' ) {
  			return;
  		}
  
  		var a = obj[ prop ].split('.');
  		var num = a.shift();
  
  		if ( isNaN( num*1 ) ) {
  			return;
  		}
  
  		obj[ prop ] = mapping[ num*1 ]+'.'+a.join('.');
  	};
  
  	/* Sanity check in the input */
  	if ( iFrom == iTo )
  	{
  		/* Pointless reorder */
  		return;
  	}
  
  	if ( iFrom < 0 || iFrom >= iCols )
  	{
  		this.oApi._fnLog( oSettings, 1, "ColReorder 'from' index is out of bounds: "+iFrom );
  		return;
  	}
  
  	if ( iTo < 0 || iTo >= iCols )
  	{
  		this.oApi._fnLog( oSettings, 1, "ColReorder 'to' index is out of bounds: "+iTo );
  		return;
  	}
  
  	/*
  	 * Calculate the new column array index, so we have a mapping between the old and new
  	 */
  	var aiMapping = [];
  	for ( i=0, iLen=iCols ; i<iLen ; i++ )
  	{
  		aiMapping[i] = i;
  	}
  	fnArraySwitch( aiMapping, iFrom, iTo );
  	var aiInvertMapping = fnInvertKeyValues( aiMapping );
  
  
  	/*
  	 * Convert all internal indexing to the new column order indexes
  	 */
  	/* Sorting */
  	for ( i=0, iLen=oSettings.aaSorting.length ; i<iLen ; i++ )
  	{
  		oSettings.aaSorting[i][0] = aiInvertMapping[ oSettings.aaSorting[i][0] ];
  	}
  
  	/* Fixed sorting */
  	if ( oSettings.aaSortingFixed !== null )
  	{
  		for ( i=0, iLen=oSettings.aaSortingFixed.length ; i<iLen ; i++ )
  		{
  			oSettings.aaSortingFixed[i][0] = aiInvertMapping[ oSettings.aaSortingFixed[i][0] ];
  		}
  	}
  
  	/* Data column sorting (the column which the sort for a given column should take places on) */
  	for ( i=0, iLen=iCols ; i<iLen ; i++ )
  	{
  		oCol = oSettings.aoColumns[i];
  		for ( j=0, jLen=oCol.aDataSort.length ; j<jLen ; j++ )
  		{
  			oCol.aDataSort[j] = aiInvertMapping[ oCol.aDataSort[j] ];
  		}
  
  		// Update the column indexes
  		oCol.idx = aiInvertMapping[ oCol.idx ];
  	}
  
  	// Update 1.10 optimised sort class removal variable
  	$.each( oSettings.aLastSort, function (i, val) {
  		oSettings.aLastSort[i].src = aiInvertMapping[ val.src ];
  	} );
  
  	/* Update the Get and Set functions for each column */
  	for ( i=0, iLen=iCols ; i<iLen ; i++ )
  	{
  		oCol = oSettings.aoColumns[i];
  
  		if ( typeof oCol.mData == 'number' ) {
  			oCol.mData = aiInvertMapping[ oCol.mData ];
  		}
  		else if ( $.isPlainObject( oCol.mData ) ) {
  			// HTML5 data sourced
  			attrMap( oCol.mData, '_',      aiInvertMapping );
  			attrMap( oCol.mData, 'filter', aiInvertMapping );
  			attrMap( oCol.mData, 'sort',   aiInvertMapping );
  			attrMap( oCol.mData, 'type',   aiInvertMapping );
  		}
  	}
  
  	/*
  	 * Move the DOM elements
  	 */
  	if ( oSettings.aoColumns[iFrom].bVisible )
  	{
  		/* Calculate the current visible index and the point to insert the node before. The insert
  		 * before needs to take into account that there might not be an element to insert before,
  		 * in which case it will be null, and an appendChild should be used
  		 */
  		var iVisibleIndex = this.oApi._fnColumnIndexToVisible( oSettings, iFrom );
  		var iInsertBeforeIndex = null;
  
  		i = iTo < iFrom ? iTo : iTo + 1;
  		while ( iInsertBeforeIndex === null && i < iCols )
  		{
  			iInsertBeforeIndex = this.oApi._fnColumnIndexToVisible( oSettings, i );
  			i++;
  		}
  
  		/* Header */
  		nTrs = oSettings.nTHead.getElementsByTagName('tr');
  		for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
  		{
  			fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
  		}
  
  		/* Footer */
  		if ( oSettings.nTFoot !== null )
  		{
  			nTrs = oSettings.nTFoot.getElementsByTagName('tr');
  			for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
  			{
  				fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
  			}
  		}
  
  		/* Body */
  		for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
  		{
  			if ( oSettings.aoData[i].nTr !== null )
  			{
  				fnDomSwitch( oSettings.aoData[i].nTr, iVisibleIndex, iInsertBeforeIndex );
  			}
  		}
  	}
  
  	/*
  	 * Move the internal array elements
  	 */
  	/* Columns */
  	fnArraySwitch( oSettings.aoColumns, iFrom, iTo );
  
  	// regenerate the get / set functions
  	for ( i=0, iLen=iCols ; i<iLen ; i++ ) {
  		oSettings.oApi._fnColumnOptions( oSettings, i, {} );
  	}
  
  	/* Search columns */
  	fnArraySwitch( oSettings.aoPreSearchCols, iFrom, iTo );
  
  	/* Array array - internal data anodes cache */
  	for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
  	{
  		var data = oSettings.aoData[i];
  		var cells = data.anCells;
  
  		if ( cells ) {
  			fnArraySwitch( cells, iFrom, iTo );
  
  			// Longer term, should this be moved into the DataTables' invalidate
  			// methods?
  			for ( j=0, jen=cells.length ; j<jen ; j++ ) {
  				if ( cells[j] && cells[j]._DT_CellIndex ) {
  					cells[j]._DT_CellIndex.column = j;
  				}
  			}
  		}
  
  		// For DOM sourced data, the invalidate will reread the cell into
  		// the data array, but for data sources as an array, they need to
  		// be flipped
  		if ( data.src !== 'dom' && Array.isArray( data._aData ) ) {
  			fnArraySwitch( data._aData, iFrom, iTo );
  		}
  	}
  
  	/* Reposition the header elements in the header layout array */
  	for ( i=0, iLen=oSettings.aoHeader.length ; i<iLen ; i++ )
  	{
  		fnArraySwitch( oSettings.aoHeader[i], iFrom, iTo );
  	}
  
  	if ( oSettings.aoFooter !== null )
  	{
  		for ( i=0, iLen=oSettings.aoFooter.length ; i<iLen ; i++ )
  		{
  			fnArraySwitch( oSettings.aoFooter[i], iFrom, iTo );
  		}
  	}
  
  	if ( invalidateRows || invalidateRows === undefined )
  	{
  		$.fn.dataTable.Api( oSettings ).rows().invalidate();
  	}
  
  	/*
  	 * Update DataTables' event handlers
  	 */
  
  	/* Sort listener */
  	for ( i=0, iLen=iCols ; i<iLen ; i++ )
  	{
  		$(oSettings.aoColumns[i].nTh).off('.DT');
  		this.oApi._fnSortAttachListener( oSettings, oSettings.aoColumns[i].nTh, i );
  	}
  
  
  	/* Fire an event so other plug-ins can update */
  	$(oSettings.oInstance).trigger( 'column-reorder.dt', [ oSettings, {
  		from: iFrom,
  		to: iTo,
  		mapping: aiInvertMapping,
  		drop: drop,
  
  		// Old style parameters for compatibility
  		iFrom: iFrom,
  		iTo: iTo,
  		aiInvertMapping: aiInvertMapping
  	} ] );
  };
  
  /**
   * ColReorder provides column visibility control for DataTables
   * @class ColReorder
   * @constructor
   * @param {object} dt DataTables settings object
   * @param {object} opts ColReorder options
   */
  var ColReorder = function( dt, opts )
  {
  	var settings = new $.fn.dataTable.Api( dt ).settings()[0];
  
  	// Ensure that we can't initialise on the same table twice
  	if ( settings._colReorder ) {
  		return settings._colReorder;
  	}
  
  	// Allow the options to be a boolean for defaults
  	if ( opts === true ) {
  		opts = {};
  	}
  
  	// Convert from camelCase to Hungarian, just as DataTables does
  	var camelToHungarian = $.fn.dataTable.camelToHungarian;
  	if ( camelToHungarian ) {
  		camelToHungarian( ColReorder.defaults, ColReorder.defaults, true );
  		camelToHungarian( ColReorder.defaults, opts || {} );
  	}
  
  
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Public class variables
  	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  	/**
  	 * @namespace Settings object which contains customisable information for ColReorder instance
  	 */
  	this.s = {
  		/**
  		 * DataTables settings object
  		 *  @property dt
  		 *  @type     Object
  		 *  @default  null
  		 */
  		"dt": null,
  
  		/**
  		 * Enable flag
  		 *  @property dt
  		 *  @type     Object
  		 *  @default  null
  		 */
  		"enable": null,
  
  		/**
  		 * Initialisation object used for this instance
  		 *  @property init
  		 *  @type     object
  		 *  @default  {}
  		 */
  		"init": $.extend( true, {}, ColReorder.defaults, opts ),
  
  		/**
  		 * Number of columns to fix (not allow to be reordered)
  		 *  @property fixed
  		 *  @type     int
  		 *  @default  0
  		 */
  		"fixed": 0,
  
  		/**
  		 * Number of columns to fix counting from right (not allow to be reordered)
  		 *  @property fixedRight
  		 *  @type     int
  		 *  @default  0
  		 */
  		"fixedRight": 0,
  
  		/**
  		 * Callback function for once the reorder has been done
  		 *  @property reorderCallback
  		 *  @type     function
  		 *  @default  null
  		 */
  		"reorderCallback": null,
  
  		/**
  		 * @namespace Information used for the mouse drag
  		 */
  		"mouse": {
  			"startX": -1,
  			"startY": -1,
  			"offsetX": -1,
  			"offsetY": -1,
  			"target": -1,
  			"targetIndex": -1,
  			"fromIndex": -1
  		},
  
  		/**
  		 * Information which is used for positioning the insert cusor and knowing where to do the
  		 * insert. Array of objects with the properties:
  		 *   x: x-axis position
  		 *   to: insert point
  		 *  @property aoTargets
  		 *  @type     array
  		 *  @default  []
  		 */
  		"aoTargets": []
  	};
  
  
  	/**
  	 * @namespace Common and useful DOM elements for the class instance
  	 */
  	this.dom = {
  		/**
  		 * Dragging element (the one the mouse is moving)
  		 *  @property drag
  		 *  @type     element
  		 *  @default  null
  		 */
  		"drag": null,
  
  		/**
  		 * The insert cursor
  		 *  @property pointer
  		 *  @type     element
  		 *  @default  null
  		 */
  		"pointer": null
  	};
  
  	/* Constructor logic */
  	this.s.enable = this.s.init.bEnable;
  	this.s.dt = settings;
  	this.s.dt._colReorder = this;
  	this._fnConstruct();
  
  	return this;
  };
  
  
  
  $.extend( ColReorder.prototype, {
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Public methods
  	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  	/**
  	 * Enable / disable end user interaction
  	 */
  	fnEnable: function ( flag )
  	{
  		if ( flag === false ) {
  			return fnDisable();
  		}
  
  		this.s.enable = true;
  	},
  
  	/**
  	 * Disable end user interaction
  	 */
  	fnDisable: function ()
  	{
  		this.s.enable = false;
  	},
  
  	/**
  	 * Reset the column ordering to the original ordering that was detected on
  	 * start up.
  	 *  @return {this} Returns `this` for chaining.
  	 *
  	 *  @example
  	 *    // DataTables initialisation with ColReorder
  	 *    var table = $('#example').dataTable( {
  	 *        "sDom": 'Rlfrtip'
  	 *    } );
  	 *
  	 *    // Add click event to a button to reset the ordering
  	 *    $('#resetOrdering').click( function (e) {
  	 *        e.preventDefault();
  	 *        $.fn.dataTable.ColReorder( table ).fnReset();
  	 *    } );
  	 */
  	"fnReset": function ()
  	{
  		this._fnOrderColumns( this.fnOrder() );
  
  		return this;
  	},
  
  	/**
  	 * `Deprecated` - Get the current order of the columns, as an array.
  	 *  @return {array} Array of column identifiers
  	 *  @deprecated `fnOrder` should be used in preference to this method.
  	 *      `fnOrder` acts as a getter/setter.
  	 */
  	"fnGetCurrentOrder": function ()
  	{
  		return this.fnOrder();
  	},
  
  	/**
  	 * Get the current order of the columns, as an array. Note that the values
  	 * given in the array are unique identifiers for each column. Currently
  	 * these are the original ordering of the columns that was detected on
  	 * start up, but this could potentially change in future.
  	 *  @return {array} Array of column identifiers
  	 *
  	 *  @example
  	 *    // Get column ordering for the table
  	 *    var order = $.fn.dataTable.ColReorder( dataTable ).fnOrder();
  	 *//**
  	 * Set the order of the columns, from the positions identified in the
  	 * ordering array given. Note that ColReorder takes a brute force approach
  	 * to reordering, so it is possible multiple reordering events will occur
  	 * before the final order is settled upon.
  	 *  @param {array} [set] Array of column identifiers in the new order. Note
  	 *    that every column must be included, uniquely, in this array.
  	 *  @return {this} Returns `this` for chaining.
  	 *
  	 *  @example
  	 *    // Swap the first and second columns
  	 *    $.fn.dataTable.ColReorder( dataTable ).fnOrder( [1, 0, 2, 3, 4] );
  	 *
  	 *  @example
  	 *    // Move the first column to the end for the table `#example`
  	 *    var curr = $.fn.dataTable.ColReorder( '#example' ).fnOrder();
  	 *    var first = curr.shift();
  	 *    curr.push( first );
  	 *    $.fn.dataTable.ColReorder( '#example' ).fnOrder( curr );
  	 *
  	 *  @example
  	 *    // Reverse the table's order
  	 *    $.fn.dataTable.ColReorder( '#example' ).fnOrder(
  	 *      $.fn.dataTable.ColReorder( '#example' ).fnOrder().reverse()
  	 *    );
  	 */
  	"fnOrder": function ( set, original )
  	{
  		var a = [], i, ien, j, jen;
  		var columns = this.s.dt.aoColumns;
  
  		if ( set === undefined ){
  			for ( i=0, ien=columns.length ; i<ien ; i++ ) {
  				a.push( columns[i]._ColReorder_iOrigCol );
  			}
  
  			return a;
  		}
  
  		// The order given is based on the original indexes, rather than the
  		// existing ones, so we need to translate from the original to current
  		// before then doing the order
  		if ( original ) {
  			var order = this.fnOrder();
  
  			for ( i=0, ien=set.length ; i<ien ; i++ ) {
  				a.push( $.inArray( set[i], order ) );
  			}
  
  			set = a;
  		}
  
  		this._fnOrderColumns( fnInvertKeyValues( set ) );
  
  		return this;
  	},
  
  
  	/**
  	 * Convert from the original column index, to the original
  	 *
  	 * @param  {int|array} idx Index(es) to convert
  	 * @param  {string} dir Transpose direction - `fromOriginal` / `toCurrent`
  	 *   or `'toOriginal` / `fromCurrent`
  	 * @return {int|array}     Converted values
  	 */
  	fnTranspose: function ( idx, dir )
  	{
  		if ( ! dir ) {
  			dir = 'toCurrent';
  		}
  
  		var order = this.fnOrder();
  		var columns = this.s.dt.aoColumns;
  
  		if ( dir === 'toCurrent' ) {
  			// Given an original index, want the current
  			return ! Array.isArray( idx ) ?
  				$.inArray( idx, order ) :
  				$.map( idx, function ( index ) {
  					return $.inArray( index, order );
  				} );
  		}
  		else {
  			// Given a current index, want the original
  			return ! Array.isArray( idx ) ?
  				columns[idx]._ColReorder_iOrigCol :
  				$.map( idx, function ( index ) {
  					return columns[index]._ColReorder_iOrigCol;
  				} );
  		}
  	},
  
  
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Private methods (they are of course public in JS, but recommended as private)
  	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  	/**
  	 * Constructor logic
  	 *  @method  _fnConstruct
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnConstruct": function ()
  	{
  		var that = this;
  		var iLen = this.s.dt.aoColumns.length;
  		var table = this.s.dt.nTable;
  		var i;
  
  		/* Columns discounted from reordering - counting left to right */
  		if ( this.s.init.iFixedColumns )
  		{
  			this.s.fixed = this.s.init.iFixedColumns;
  		}
  
  		if ( this.s.init.iFixedColumnsLeft )
  		{
  			this.s.fixed = this.s.init.iFixedColumnsLeft;
  		}
  
  		/* Columns discounted from reordering - counting right to left */
  		this.s.fixedRight = this.s.init.iFixedColumnsRight ?
  			this.s.init.iFixedColumnsRight :
  			0;
  
  		/* Drop callback initialisation option */
  		if ( this.s.init.fnReorderCallback )
  		{
  			this.s.reorderCallback = this.s.init.fnReorderCallback;
  		}
  
  		/* Add event handlers for the drag and drop, and also mark the original column order */
  		for ( i = 0; i < iLen; i++ )
  		{
  			if ( i > this.s.fixed-1 && i < iLen - this.s.fixedRight )
  			{
  				this._fnMouseListener( i, this.s.dt.aoColumns[i].nTh );
  			}
  
  			/* Mark the original column order for later reference */
  			this.s.dt.aoColumns[i]._ColReorder_iOrigCol = i;
  		}
  
  		/* State saving */
  		this.s.dt.oApi._fnCallbackReg( this.s.dt, 'aoStateSaveParams', function (oS, oData) {
  			that._fnStateSave.call( that, oData );
  		}, "ColReorder_State" );
  
  		/* An initial column order has been specified */
  		var aiOrder = null;
  		if ( this.s.init.aiOrder )
  		{
  			aiOrder = this.s.init.aiOrder.slice();
  		}
  
  		/* State loading, overrides the column order given */
  		if ( this.s.dt.oLoadedState && typeof this.s.dt.oLoadedState.ColReorder != 'undefined' &&
  		  this.s.dt.oLoadedState.ColReorder.length == this.s.dt.aoColumns.length )
  		{
  			aiOrder = this.s.dt.oLoadedState.ColReorder;
  		}
  
  		/* If we have an order to apply - do so */
  		if ( aiOrder )
  		{
  			/* We might be called during or after the DataTables initialisation. If before, then we need
  			 * to wait until the draw is done, if after, then do what we need to do right away
  			 */
  			if ( !that.s.dt._bInitComplete )
  			{
  				var bDone = false;
  				$(table).on( 'draw.dt.colReorder', function () {
  					if ( !that.s.dt._bInitComplete && !bDone )
  					{
  						bDone = true;
  						var resort = fnInvertKeyValues( aiOrder );
  						that._fnOrderColumns.call( that, resort );
  					}
  				} );
  			}
  			else
  			{
  				var resort = fnInvertKeyValues( aiOrder );
  				that._fnOrderColumns.call( that, resort );
  			}
  		}
  		else {
  			this._fnSetColumnIndexes();
  		}
  
  		// Destroy clean up
  		$(table).on( 'destroy.dt.colReorder', function () {
  			$(table).off( 'destroy.dt.colReorder draw.dt.colReorder' );
  
  			$.each( that.s.dt.aoColumns, function (i, column) {
  				$(column.nTh).off('.ColReorder');
  				$(column.nTh).removeAttr('data-column-index');
  			} );
  
  			that.s.dt._colReorder = null;
  			that.s = null;
  		} );
  	},
  
  
  	/**
  	 * Set the column order from an array
  	 *  @method  _fnOrderColumns
  	 *  @param   array a An array of integers which dictate the column order that should be applied
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnOrderColumns": function ( a )
  	{
  		var changed = false;
  
  		if ( a.length != this.s.dt.aoColumns.length )
  		{
  			this.s.dt.oInstance.oApi._fnLog( this.s.dt, 1, "ColReorder - array reorder does not "+
  				"match known number of columns. Skipping." );
  			return;
  		}
  
  		for ( var i=0, iLen=a.length ; i<iLen ; i++ )
  		{
  			var currIndex = $.inArray( i, a );
  			if ( i != currIndex )
  			{
  				/* Reorder our switching array */
  				fnArraySwitch( a, currIndex, i );
  
  				/* Do the column reorder in the table */
  				this.s.dt.oInstance.fnColReorder( currIndex, i, true, false );
  
  				changed = true;
  			}
  		}
  
  		this._fnSetColumnIndexes();
  
  		// Has anything actually changed? If not, then nothing else to do
  		if ( ! changed ) {
  			return;
  		}
  
  		$.fn.dataTable.Api( this.s.dt ).rows().invalidate();
  
  		/* When scrolling we need to recalculate the column sizes to allow for the shift */
  		if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
  		{
  			this.s.dt.oInstance.fnAdjustColumnSizing( false );
  		}
  
  		/* Save the state */
  		this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
  
  		if ( this.s.reorderCallback !== null )
  		{
  			this.s.reorderCallback.call( this );
  		}
  	},
  
  
  	/**
  	 * Because we change the indexes of columns in the table, relative to their starting point
  	 * we need to reorder the state columns to what they are at the starting point so we can
  	 * then rearrange them again on state load!
  	 *  @method  _fnStateSave
  	 *  @param   object oState DataTables state
  	 *  @returns string JSON encoded cookie string for DataTables
  	 *  @private
  	 */
  	"_fnStateSave": function ( oState )
  	{
  		var i, iLen, aCopy, iOrigColumn;
  		var oSettings = this.s.dt;
  		var columns = oSettings.aoColumns;
  
  		oState.ColReorder = [];
  
  		/* Sorting */
  		if ( oState.aaSorting ) {
  			// 1.10.0-
  			for ( i=0 ; i<oState.aaSorting.length ; i++ ) {
  				oState.aaSorting[i][0] = columns[ oState.aaSorting[i][0] ]._ColReorder_iOrigCol;
  			}
  
  			var aSearchCopy = $.extend( true, [], oState.aoSearchCols );
  
  			for ( i=0, iLen=columns.length ; i<iLen ; i++ )
  			{
  				iOrigColumn = columns[i]._ColReorder_iOrigCol;
  
  				/* Column filter */
  				oState.aoSearchCols[ iOrigColumn ] = aSearchCopy[i];
  
  				/* Visibility */
  				oState.abVisCols[ iOrigColumn ] = columns[i].bVisible;
  
  				/* Column reordering */
  				oState.ColReorder.push( iOrigColumn );
  			}
  		}
  		else if ( oState.order ) {
  			// 1.10.1+
  			for ( i=0 ; i<oState.order.length ; i++ ) {
  				oState.order[i][0] = columns[ oState.order[i][0] ]._ColReorder_iOrigCol;
  			}
  
  			var stateColumnsCopy = $.extend( true, [], oState.columns );
  
  			for ( i=0, iLen=columns.length ; i<iLen ; i++ )
  			{
  				iOrigColumn = columns[i]._ColReorder_iOrigCol;
  
  				/* Columns */
  				oState.columns[ iOrigColumn ] = stateColumnsCopy[i];
  
  				/* Column reordering */
  				oState.ColReorder.push( iOrigColumn );
  			}
  		}
  	},
  
  
  	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  	 * Mouse drop and drag
  	 */
  
  	/**
  	 * Add a mouse down listener to a particluar TH element
  	 *  @method  _fnMouseListener
  	 *  @param   int i Column index
  	 *  @param   element nTh TH element clicked on
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnMouseListener": function ( i, nTh )
  	{
  		var that = this;
  		$(nTh)
  			.on( 'mousedown.ColReorder', function (e) {
  				if ( that.s.enable && e.which === 1 ) {
  					that._fnMouseDown.call( that, e, nTh );
  				}
  			} )
  			.on( 'touchstart.ColReorder', function (e) {
  				if ( that.s.enable ) {
  					that._fnMouseDown.call( that, e, nTh );
  				}
  			} );
  	},
  
  
  	/**
  	 * Mouse down on a TH element in the table header
  	 *  @method  _fnMouseDown
  	 *  @param   event e Mouse event
  	 *  @param   element nTh TH element to be dragged
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnMouseDown": function ( e, nTh )
  	{
  		var that = this;
  
  		/* Store information about the mouse position */
  		var target = $(e.target).closest('th, td');
  		var offset = target.offset();
  		var idx = parseInt( $(nTh).attr('data-column-index'), 10 );
  
  		if ( idx === undefined ) {
  			return;
  		}
  
  		this.s.mouse.startX = this._fnCursorPosition( e, 'pageX' );
  		this.s.mouse.startY = this._fnCursorPosition( e, 'pageY' );
  		this.s.mouse.offsetX = this._fnCursorPosition( e, 'pageX' ) - offset.left;
  		this.s.mouse.offsetY = this._fnCursorPosition( e, 'pageY' ) - offset.top;
  		this.s.mouse.target = this.s.dt.aoColumns[ idx ].nTh;//target[0];
  		this.s.mouse.targetIndex = idx;
  		this.s.mouse.fromIndex = idx;
  
  		this._fnRegions();
  
  		/* Add event handlers to the document */
  		$(document)
  			.on( 'mousemove.ColReorder touchmove.ColReorder', function (e) {
  				that._fnMouseMove.call( that, e );
  			} )
  			.on( 'mouseup.ColReorder touchend.ColReorder', function (e) {
  				that._fnMouseUp.call( that, e );
  			} );
  	},
  
  
  	/**
  	 * Deal with a mouse move event while dragging a node
  	 *  @method  _fnMouseMove
  	 *  @param   event e Mouse event
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnMouseMove": function ( e )
  	{
  		var that = this;
  
  		if ( this.dom.drag === null )
  		{
  			/* Only create the drag element if the mouse has moved a specific distance from the start
  			 * point - this allows the user to make small mouse movements when sorting and not have a
  			 * possibly confusing drag element showing up
  			 */
  			if ( Math.pow(
  				Math.pow(this._fnCursorPosition( e, 'pageX') - this.s.mouse.startX, 2) +
  				Math.pow(this._fnCursorPosition( e, 'pageY') - this.s.mouse.startY, 2), 0.5 ) < 5 )
  			{
  				return;
  			}
  			this._fnCreateDragNode();
  		}
  
  		/* Position the element - we respect where in the element the click occured */
  		this.dom.drag.css( {
  			left: this._fnCursorPosition( e, 'pageX' ) - this.s.mouse.offsetX,
  			top: this._fnCursorPosition( e, 'pageY' ) - this.s.mouse.offsetY
  		} );
  
  		/* Based on the current mouse position, calculate where the insert should go */
  		var target;
  		var lastToIndex = this.s.mouse.toIndex;
  		var cursorXPosiotion = this._fnCursorPosition(e, 'pageX');
  		var targetsPrev = function (i) {
  			while (i >= 0) {
  				i--;
  
  				if (i <= 0) {
  					return null;
  				}
  
  				if (that.s.aoTargets[i+1].x !== that.s.aoTargets[i].x) {
  					return that.s.aoTargets[i];
  				}
  			}
  		};
  		var firstNotHidden = function () {
  			for (var i=0 ; i<that.s.aoTargets.length-1 ; i++) {
  				if (that.s.aoTargets[i].x !== that.s.aoTargets[i+1].x) {
  					return that.s.aoTargets[i];
  				}
  			}
  		};
  		var lastNotHidden = function () {
  			for (var i=that.s.aoTargets.length-1 ; i>0 ; i--) {
  				if (that.s.aoTargets[i].x !== that.s.aoTargets[i-1].x) {
  					return that.s.aoTargets[i];
  				}
  			}
  		};
  
          for (var i = 1; i < this.s.aoTargets.length; i++) {
  			var prevTarget = targetsPrev(i);
  			if (! prevTarget) {
  				prevTarget = firstNotHidden();
  			}
  
  			var prevTargetMiddle = prevTarget.x + (this.s.aoTargets[i].x - prevTarget.x) / 2;
  
              if (this._fnIsLtr()) {
                  if (cursorXPosiotion < prevTargetMiddle ) {
                      target = prevTarget;
                      break;
                  }
              }
              else {
                  if (cursorXPosiotion > prevTargetMiddle) {
                      target = prevTarget;
                      break;
                  }
              }
  		}
  
          if (target) {
              this.dom.pointer.css('left', target.x);
              this.s.mouse.toIndex = target.to;
          }
          else {
  			// The insert element wasn't positioned in the array (less than
  			// operator), so we put it at the end
  			this.dom.pointer.css( 'left', lastNotHidden().x );
  			this.s.mouse.toIndex = lastNotHidden().to;
  		}
  
  		// Perform reordering if realtime updating is on and the column has moved
  		if ( this.s.init.bRealtime && lastToIndex !== this.s.mouse.toIndex ) {
  			this.s.dt.oInstance.fnColReorder( this.s.mouse.fromIndex, this.s.mouse.toIndex );
  			this.s.mouse.fromIndex = this.s.mouse.toIndex;
  
  			// Not great for performance, but required to keep everything in alignment
  			if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
  			{
  				this.s.dt.oInstance.fnAdjustColumnSizing( false );
  			}
  
  			this._fnRegions();
  		}
  	},
  
  
  	/**
  	 * Finish off the mouse drag and insert the column where needed
  	 *  @method  _fnMouseUp
  	 *  @param   event e Mouse event
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnMouseUp": function ( e )
  	{
  		var that = this;
  
  		$(document).off( '.ColReorder' );
  
  		if ( this.dom.drag !== null )
  		{
  			/* Remove the guide elements */
  			this.dom.drag.remove();
  			this.dom.pointer.remove();
  			this.dom.drag = null;
  			this.dom.pointer = null;
  
  			/* Actually do the reorder */
  			this.s.dt.oInstance.fnColReorder( this.s.mouse.fromIndex, this.s.mouse.toIndex, true );
  			this._fnSetColumnIndexes();
  
  			/* When scrolling we need to recalculate the column sizes to allow for the shift */
  			if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
  			{
  				this.s.dt.oInstance.fnAdjustColumnSizing( false );
  			}
  
  			/* Save the state */
  			this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
  
  			if ( this.s.reorderCallback !== null )
  			{
  				this.s.reorderCallback.call( this );
  			}
  		}
  	},
  
  
  	/**
  	 * Calculate a cached array with the points of the column inserts, and the
  	 * 'to' points
  	 *  @method  _fnRegions
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnRegions": function ()
  	{
  		var aoColumns = this.s.dt.aoColumns;
          var isLTR = this._fnIsLtr();
  		this.s.aoTargets.splice(0, this.s.aoTargets.length);
  		var lastBound = $(this.s.dt.nTable).offset().left;
  
          var aoColumnBounds = [];
          $.each(aoColumns, function (i, column) {
              if (column.bVisible && column.nTh.style.display !== 'none') {
                  var nth = $(column.nTh);
  				var bound = nth.offset().left;
  
                  if (isLTR) {
                      bound += nth.outerWidth();
                  }
  
                  aoColumnBounds.push({
                      index: i,
                      bound: bound
  				});
  
  				lastBound = bound;
  			}
  			else {
                  aoColumnBounds.push({
  					index: i,
  					bound: lastBound
                  });
  			}
  		});
  
          var firstColumn = aoColumnBounds[0];
  		var firstColumnWidth = $(aoColumns[firstColumn.index].nTh).outerWidth();
  
          this.s.aoTargets.push({
              to: 0,
  			x: firstColumn.bound - firstColumnWidth
          });
  
          for (var i = 0; i < aoColumnBounds.length; i++) {
              var columnBound = aoColumnBounds[i];
              var iToPoint = columnBound.index;
  
              /* For the column / header in question, we want it's position to remain the same if the
              * position is just to it's immediate left or right, so we only increment the counter for
              * other columns
              */
              if (columnBound.index < this.s.mouse.fromIndex) {
                  iToPoint++;
              }
  
              this.s.aoTargets.push({
  				to: iToPoint,
                  x: columnBound.bound
              });
          }
  
  		/* Disallow columns for being reordered by drag and drop, counting right to left */
  		if ( this.s.fixedRight !== 0 )
  		{
  			this.s.aoTargets.splice( this.s.aoTargets.length - this.s.fixedRight );
  		}
  
  		/* Disallow columns for being reordered by drag and drop, counting left to right */
  		if ( this.s.fixed !== 0 )
  		{
  			this.s.aoTargets.splice( 0, this.s.fixed );
  		}
  	},
  
  
  	/**
  	 * Copy the TH element that is being drags so the user has the idea that they are actually
  	 * moving it around the page.
  	 *  @method  _fnCreateDragNode
  	 *  @returns void
  	 *  @private
  	 */
  	"_fnCreateDragNode": function ()
  	{
  		var scrolling = this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "";
  
  		var origCell = this.s.dt.aoColumns[ this.s.mouse.targetIndex ].nTh;
  		var origTr = origCell.parentNode;
  		var origThead = origTr.parentNode;
  		var origTable = origThead.parentNode;
  		var cloneCell = $(origCell).clone();
  
  		// This is a slightly odd combination of jQuery and DOM, but it is the
  		// fastest and least resource intensive way I could think of cloning
  		// the table with just a single header cell in it.
  		this.dom.drag = $(origTable.cloneNode(false))
  			.addClass( 'DTCR_clonedTable' )
  			.append(
  				$(origThead.cloneNode(false)).append(
  					$(origTr.cloneNode(false)).append(
  						cloneCell[0]
  					)
  				)
  			)
  			.css( {
  				position: 'absolute',
  				top: 0,
  				left: 0,
  				width: $(origCell).outerWidth(),
  				height: $(origCell).outerHeight()
  			} )
  			.appendTo( 'body' );
  
  		this.dom.pointer = $('<div></div>')
  			.addClass( 'DTCR_pointer' )
  			.css( {
  				position: 'absolute',
  				top: scrolling ?
  					$('div.dataTables_scroll', this.s.dt.nTableWrapper).offset().top :
  					$(this.s.dt.nTable).offset().top,
  				height : scrolling ?
  					$('div.dataTables_scroll', this.s.dt.nTableWrapper).height() :
  					$(this.s.dt.nTable).height()
  			} )
  			.appendTo( 'body' );
  	},
  
  
  	/**
  	 * Add a data attribute to the column headers, so we know the index of
  	 * the row to be reordered. This allows fast detection of the index, and
  	 * for this plug-in to work with FixedHeader which clones the nodes.
  	 *  @private
  	 */
  	"_fnSetColumnIndexes": function ()
  	{
  		$.each( this.s.dt.aoColumns, function (i, column) {
  			$(column.nTh).attr('data-column-index', i);
  		} );
  	},
  
  
  	/**
  	 * Get cursor position regardless of mouse or touch input
  	 * @param  {Event}  e    jQuery Event
  	 * @param  {string} prop Property to get
  	 * @return {number}      Value
  	 */
  	_fnCursorPosition: function ( e, prop ) {
  		if ( e.type.indexOf('touch') !== -1 ) {
  			return e.originalEvent.touches[0][ prop ];
  		}
  		return e[ prop ];
      },
  
      _fnIsLtr: function () {
          return $(this.s.dt.nTable).css('direction') !== "rtl";
      }
  } );
  
  
  
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Static parameters
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  
  /**
   * ColReorder default settings for initialisation
   *  @namespace
   *  @static
   */
  ColReorder.defaults = {
  	/**
  	 * Predefined ordering for the columns that will be applied automatically
  	 * on initialisation. If not specified then the order that the columns are
  	 * found to be in the HTML is the order used.
  	 *  @type array
  	 *  @default null
  	 *  @static
  	 */
  	aiOrder: null,
  
  	/**
  	 * ColReorder enable on initialisation
  	 *  @type boolean
  	 *  @default true
  	 *  @static
  	 */
  	bEnable: true,
  
  	/**
  	 * Redraw the table's column ordering as the end user draws the column
  	 * (`true`) or wait until the mouse is released (`false` - default). Note
  	 * that this will perform a redraw on each reordering, which involves an
  	 * Ajax request each time if you are using server-side processing in
  	 * DataTables.
  	 *  @type boolean
  	 *  @default false
  	 *  @static
  	 */
  	bRealtime: true,
  
  	/**
  	 * Indicate how many columns should be fixed in position (counting from the
  	 * left). This will typically be 1 if used, but can be as high as you like.
  	 *  @type int
  	 *  @default 0
  	 *  @static
  	 */
  	iFixedColumnsLeft: 0,
  
  	/**
  	 * As `iFixedColumnsRight` but counting from the right.
  	 *  @type int
  	 *  @default 0
  	 *  @static
  	 */
  	iFixedColumnsRight: 0,
  
  	/**
  	 * Callback function that is fired when columns are reordered. The `column-
  	 * reorder` event is preferred over this callback
  	 *  @type function():void
  	 *  @default null
  	 *  @static
  	 */
  	fnReorderCallback: null
  };
  
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Constants
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  /**
   * ColReorder version
   *  @constant  version
   *  @type      String
   *  @default   As code
   */
  ColReorder.version = "1.5.3";
  
  
  
  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables interfaces
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  // Expose
  $.fn.dataTable.ColReorder = ColReorder;
  $.fn.DataTable.ColReorder = ColReorder;
  
  
  // Register a new feature with DataTables
  if ( typeof $.fn.dataTable == "function" &&
       typeof $.fn.dataTableExt.fnVersionCheck == "function" &&
       $.fn.dataTableExt.fnVersionCheck('1.10.8') )
  {
  	$.fn.dataTableExt.aoFeatures.push( {
  		"fnInit": function( settings ) {
  			var table = settings.oInstance;
  
  			if ( ! settings._colReorder ) {
  				var dtInit = settings.oInit;
  				var opts = dtInit.colReorder || dtInit.oColReorder || {};
  
  				new ColReorder( settings, opts );
  			}
  			else {
  				table.oApi._fnLog( settings, 1, "ColReorder attempted to initialise twice. Ignoring second" );
  			}
  
  			return null; /* No node for DataTables to insert */
  		},
  		"cFeature": "R",
  		"sFeature": "ColReorder"
  	} );
  }
  else {
  	alert( "Warning: ColReorder requires DataTables 1.10.8 or greater - www.datatables.net/download");
  }
  
  
  // Attach a listener to the document which listens for DataTables initialisation
  // events so we can automatically initialise
  $(document).on( 'preInit.dt.colReorder', function (e, settings) {
  	if ( e.namespace !== 'dt' ) {
  		return;
  	}
  
  	var init = settings.oInit.colReorder;
  	var defaults = DataTable.defaults.colReorder;
  
  	if ( init || defaults ) {
  		var opts = $.extend( {}, init, defaults );
  
  		if ( init !== false ) {
  			new ColReorder( settings, opts  );
  		}
  	}
  } );
  
  
  // API augmentation
  $.fn.dataTable.Api.register( 'colReorder.reset()', function () {
  	return this.iterator( 'table', function ( ctx ) {
  		ctx._colReorder.fnReset();
  	} );
  } );
  
  $.fn.dataTable.Api.register( 'colReorder.order()', function ( set, original ) {
  	if ( set ) {
  		return this.iterator( 'table', function ( ctx ) {
  			ctx._colReorder.fnOrder( set, original );
  		} );
  	}
  
  	return this.context.length ?
  		this.context[0]._colReorder.fnOrder() :
  		null;
  } );
  
  $.fn.dataTable.Api.register( 'colReorder.transpose()', function ( idx, dir ) {
  	return this.context.length && this.context[0]._colReorder ?
  		this.context[0]._colReorder.fnTranspose( idx, dir ) :
  		idx;
  } );
  
  $.fn.dataTable.Api.register( 'colReorder.move()', function( from, to, drop, invalidateRows ) {
  	if (this.context.length) {
  		this.context[0]._colReorder.s.dt.oInstance.fnColReorder( from, to, drop, invalidateRows );
  		this.context[0]._colReorder._fnSetColumnIndexes();
  	}
  	return this;
  } );
  
  $.fn.dataTable.Api.register( 'colReorder.enable()', function( flag ) {
  	return this.iterator( 'table', function ( ctx ) {
  		if ( ctx._colReorder ) {
  			ctx._colReorder.fnEnable( flag );
  		}
  	} );
  } );
  
  $.fn.dataTable.Api.register( 'colReorder.disable()', function() {
  	return this.iterator( 'table', function ( ctx ) {
  		if ( ctx._colReorder ) {
  			ctx._colReorder.fnDisable();
  		}
  	} );
  } );
  
  
  return ColReorder;
  }));
  