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Filename : dataTables.fixedColumns.js
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/*! FixedColumns 3.8.0
 * ©2010-2018 SpryMedia Ltd - datatables.net/license
 */

/**
 * @summary     FixedColumns
 * @description Freeze columns in place on a scrolling DataTable
 * @version     3.8.0
 * @file        dataTables.fixedColumns.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     www.sprymedia.co.uk/contact
 * @copyright   Copyright 2010-2018 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;
var _firefoxScroll;

/**
 * When making use of DataTables' x-axis scrolling feature, you may wish to
 * fix the left most column in place. This plug-in for DataTables provides
 * exactly this option (note for non-scrolling tables, please use the
 * FixedHeader plug-in, which can fix headers and footers). Key
 * features include:
 *
 * * Freezes the left or right most columns to the side of the table
 * * Option to freeze two or more columns
 * * Full integration with DataTables' scrolling options
 * * Speed - FixedColumns is fast in its operation
 *
 *  @class
 *  @constructor
 *  @global
 *  @param {object} dt DataTables instance. With DataTables 1.10 this can also
 *    be a jQuery collection, a jQuery selector, DataTables API instance or
 *    settings object.
 *  @param {object} [init={}] Configuration object for FixedColumns. Options are
 *    defined by {@link FixedColumns.defaults}
 *
 *  @requires jQuery 1.7+
 *  @requires DataTables 1.8.0+
 *
 *  @example
 *      var table = $('#example').dataTable( {
 *        "scrollX": "100%"
 *      } );
 *      new $.fn.dataTable.fixedColumns( table );
 */
var FixedColumns = function ( dt, init ) {
	var that = this;

	/* Sanity check - you just know it will happen */
	if ( ! ( this instanceof FixedColumns ) ) {
		alert( "FixedColumns warning: FixedColumns must be initialised with the 'new' keyword." );
		return;
	}

	if ( init === undefined || init === true ) {
		init = {};
	}

	// Use the DataTables Hungarian notation mapping method, if it exists to
	// provide forwards compatibility for camel case variables
	var camelToHungarian = $.fn.dataTable.camelToHungarian;
	if ( camelToHungarian ) {
		camelToHungarian( FixedColumns.defaults, FixedColumns.defaults, true );
		camelToHungarian( FixedColumns.defaults, init );
	}

	// v1.10 allows the settings object to be got form a number of sources
	var dtSettings = new $.fn.dataTable.Api( dt ).settings()[0];

	/**
	 * Settings object which contains customisable information for FixedColumns instance
	 * @namespace
	 * @extends FixedColumns.defaults
	 * @private
	 */
	this.s = {
		/**
		 * DataTables settings objects
		 *  @type     object
		 *  @default  Obtained from DataTables instance
		 */
		"dt": dtSettings,

		/**
		 * Number of columns in the DataTable - stored for quick access
		 *  @type     int
		 *  @default  Obtained from DataTables instance
		 */
		"iTableColumns": dtSettings.aoColumns.length,

		/**
		 * Original outer widths of the columns as rendered by DataTables - used to calculate
		 * the FixedColumns grid bounding box
		 *  @type     array.<int>
		 *  @default  []
		 */
		"aiOuterWidths": [],

		/**
		 * Original inner widths of the columns as rendered by DataTables - used to apply widths
		 * to the columns
		 *  @type     array.<int>
		 *  @default  []
		 */
		"aiInnerWidths": [],


		/**
		 * Is the document layout right-to-left
		 * @type boolean
		 */
		rtl: $(dtSettings.nTable).css('direction') === 'rtl'
	};


	/**
	 * DOM elements used by the class instance
	 * @namespace
	 * @private
	 *
	 */
	this.dom = {
		/**
		 * DataTables scrolling element
		 *  @type     node
		 *  @default  null
		 */
		"scroller": null,

		/**
		 * DataTables header table
		 *  @type     node
		 *  @default  null
		 */
		"header": null,

		/**
		 * DataTables body table
		 *  @type     node
		 *  @default  null
		 */
		"body": null,

		/**
		 * DataTables footer table
		 *  @type     node
		 *  @default  null
		 */
		"footer": null,

		/**
		 * Display grid elements
		 * @namespace
		 */
		"grid": {
			/**
			 * Grid wrapper. This is the container element for the 3x3 grid
			 *  @type     node
			 *  @default  null
			 */
			"wrapper": null,

			/**
			 * DataTables scrolling element. This element is the DataTables
			 * component in the display grid (making up the main table - i.e.
			 * not the fixed columns).
			 *  @type     node
			 *  @default  null
			 */
			"dt": null,

			/**
			 * Left fixed column grid components
			 * @namespace
			 */
			"left": {
				"wrapper": null,
				"head": null,
				"body": null,
				"foot": null
			},

			/**
			 * Right fixed column grid components
			 * @namespace
			 */
			"right": {
				"wrapper": null,
				"head": null,
				"body": null,
				"foot": null
			}
		},

		/**
		 * Cloned table nodes
		 * @namespace
		 */
		"clone": {
			/**
			 * Left column cloned table nodes
			 * @namespace
			 */
			"left": {
				/**
				 * Cloned header table
				 *  @type     node
				 *  @default  null
				 */
				"header": null,

				/**
				 * Cloned body table
				 *  @type     node
				 *  @default  null
				 */
				"body": null,

				/**
				 * Cloned footer table
				 *  @type     node
				 *  @default  null
				 */
				"footer": null
			},

			/**
			 * Right column cloned table nodes
			 * @namespace
			 */
			"right": {
				/**
				 * Cloned header table
				 *  @type     node
				 *  @default  null
				 */
				"header": null,

				/**
				 * Cloned body table
				 *  @type     node
				 *  @default  null
				 */
				"body": null,

				/**
				 * Cloned footer table
				 *  @type     node
				 *  @default  null
				 */
				"footer": null
			}
		}
	};

	if ( dtSettings._oFixedColumns ) {
		throw 'FixedColumns already initialised on this table';
	}

	/* Attach the instance to the DataTables instance so it can be accessed easily */
	dtSettings._oFixedColumns = this;

	/* Let's do it */
	if ( ! dtSettings._bInitComplete )
	{
		dtSettings.oApi._fnCallbackReg( dtSettings, 'aoInitComplete', function () {
			that._fnConstruct( init );
		}, 'FixedColumns' );
	}
	else
	{
		this._fnConstruct( init );
	}
};



$.extend( FixedColumns.prototype , {
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Public methods
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

	/**
	 * Update the fixed columns - including headers and footers. Note that FixedColumns will
	 * automatically update the display whenever the host DataTable redraws.
	 *  @returns {void}
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      var fc = new $.fn.dataTable.fixedColumns( table );
	 *
	 *      // at some later point when the table has been manipulated....
	 *      fc.fnUpdate();
	 */
	"fnUpdate": function ()
	{
		this._fnDraw( true );
	},


	/**
	 * Recalculate the resizes of the 3x3 grid that FixedColumns uses for display of the table.
	 * This is useful if you update the width of the table container. Note that FixedColumns will
	 * perform this function automatically when the window.resize event is fired.
	 *  @returns {void}
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      var fc = new $.fn.dataTable.fixedColumns( table );
	 *
	 *      // Resize the table container and then have FixedColumns adjust its layout....
	 *      $('#content').width( 1200 );
	 *      fc.fnRedrawLayout();
	 */
	"fnRedrawLayout": function ()
	{
		this._fnColCalc();
		this._fnGridLayout();
		this.fnUpdate();
	},


	/**
	 * Mark a row such that it's height should be recalculated when using 'semiauto' row
	 * height matching. This function will have no effect when 'none' or 'auto' row height
	 * matching is used.
	 *  @param   {Node} nTr TR element that should have it's height recalculated
	 *  @returns {void}
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      var fc = new $.fn.dataTable.fixedColumns( table );
	 *
	 *      // manipulate the table - mark the row as needing an update then update the table
	 *      // this allows the redraw performed by DataTables fnUpdate to recalculate the row
	 *      // height
	 *      fc.fnRecalculateHeight();
	 *      table.fnUpdate( $('#example tbody tr:eq(0)')[0], ["insert date", 1, 2, 3 ... ]);
	 */
	"fnRecalculateHeight": function ( nTr )
	{
		delete nTr._DTTC_iHeight;
		nTr.style.height = 'auto';
	},


	/**
	 * Set the height of a given row - provides cross browser compatibility
	 *  @param   {Node} nTarget TR element that should have it's height recalculated
	 *  @param   {int} iHeight Height in pixels to set
	 *  @returns {void}
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      var fc = new $.fn.dataTable.fixedColumns( table );
	 *
	 *      // You may want to do this after manipulating a row in the fixed column
	 *      fc.fnSetRowHeight( $('#example tbody tr:eq(0)')[0], 50 );
	 */
	"fnSetRowHeight": function ( nTarget, iHeight )
	{
		nTarget.style.height = iHeight+"px";
	},


	/**
	 * Get data index information about a row or cell in the table body.
	 * This function is functionally identical to fnGetPosition in DataTables,
	 * taking the same parameter (TH, TD or TR node) and returning exactly the
	 * the same information (data index information). THe difference between
	 * the two is that this method takes into account the fixed columns in the
	 * table, so you can pass in nodes from the master table, or the cloned
	 * tables and get the index position for the data in the main table.
	 *  @param {node} node TR, TH or TD element to get the information about
	 *  @returns {int} If nNode is given as a TR, then a single index is 
	 *    returned, or if given as a cell, an array of [row index, column index
	 *    (visible), column index (all)] is given.
	 */
	"fnGetPosition": function ( node )
	{
		var idx;
		var inst = this.s.dt.oInstance;

		if ( ! $(node).parents('.DTFC_Cloned').length )
		{
			// Not in a cloned table
			return inst.fnGetPosition( node );
		}
		else
		{
			// Its in the cloned table, so need to look up position
			if ( node.nodeName.toLowerCase() === 'tr' ) {
				idx = $(node).index();
				return inst.fnGetPosition( $('tr', this.s.dt.nTBody)[ idx ] );
			}
			else
			{
				var colIdx = $(node).index();
				idx = $(node.parentNode).index();
				var row = inst.fnGetPosition( $('tr', this.s.dt.nTBody)[ idx ] );

				return [
					row,
					colIdx,
					inst.oApi._fnVisibleToColumnIndex( this.s.dt, colIdx )
				];
			}
		}
	},

	fnToFixedNode: function ( rowIdx, colIdx )
	{
		var found;

		if ( colIdx < this.s.iLeftColumns ) {
			found = $(this.dom.clone.left.body).find('[data-dt-row='+rowIdx+'][data-dt-column='+colIdx+']');
		}
		else if ( colIdx >= this.s.iRightColumns ) {
			found = $(this.dom.clone.right.body).find('[data-dt-row='+rowIdx+'][data-dt-column='+colIdx+']');
		}

		if ( found && found.length ) {
			return found[0];
		}

		// Fallback - non-fixed node
		var table = new $.fn.dataTable.Api(this.s.dt);
		return table.cell(rowIdx, colIdx).node();
	},


	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Private methods (they are of course public in JS, but recommended as private)
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

	/**
	 * Initialisation for FixedColumns
	 *  @param   {Object} oInit User settings for initialisation
	 *  @returns {void}
	 *  @private
	 */
	"_fnConstruct": function ( oInit )
	{
		var i, iLen, iWidth,
			that = this;

		/* Sanity checking */
		if ( typeof this.s.dt.oInstance.fnVersionCheck != 'function' ||
		     this.s.dt.oInstance.fnVersionCheck( '1.8.0' ) !== true )
		{
			alert( "FixedColumns "+FixedColumns.VERSION+" required DataTables 1.8.0 or later. "+
				"Please upgrade your DataTables installation" );
			return;
		}

		if ( this.s.dt.oScroll.sX === "" )
		{
			this.s.dt.oInstance.oApi._fnLog( this.s.dt, 1, "FixedColumns is not needed (no "+
				"x-scrolling in DataTables enabled), so no action will be taken. Use 'FixedHeader' for "+
				"column fixing when scrolling is not enabled" );
			return;
		}

		/* Apply the settings from the user / defaults */
		this.s = $.extend( true, this.s, FixedColumns.defaults, oInit );

		/* Set up the DOM as we need it and cache nodes */
		var classes = this.s.dt.oClasses;
		this.dom.grid.dt = $(this.s.dt.nTable).parents('div.'+classes.sScrollWrapper)[0];
		this.dom.scroller = $('div.'+classes.sScrollBody, this.dom.grid.dt )[0];

		/* Set up the DOM that we want for the fixed column layout grid */
		this._fnColCalc();
		this._fnGridSetup();

		/* Event handlers */
		var mouseController;
		var mouseDown = false;

		// When the mouse is down (drag scroll) the mouse controller cannot
		// change, as the browser keeps the original element as the scrolling one
		$(this.s.dt.nTableWrapper).on( 'mousedown.DTFC', function (e) {
			if ( e.button === 0 ) {
				mouseDown = true;

				$(document).one( 'mouseup', function () {
					mouseDown = false;
				} );
			}
		} );

		// When the body is scrolled - scroll the left and right columns
		$(this.dom.scroller)
			.on( 'mouseover.DTFC touchstart.DTFC', function () {
				if ( ! mouseDown ) {
					mouseController = 'main';
				}
			} )
			.on( 'scroll.DTFC', function (e) {
				if ( ! mouseController && e.originalEvent ) {
					mouseController = 'main';
				}

				if ( mouseController === 'main' ) {
					if ( that.s.iLeftColumns > 0 ) {
						that.dom.grid.left.liner.scrollTop = that.dom.scroller.scrollTop;
					}
					if ( that.s.iRightColumns > 0 ) {
						that.dom.grid.right.liner.scrollTop = that.dom.scroller.scrollTop;
					}
				}
			} );

		var wheelType = 'onwheel' in document.createElement('div') ?
			'wheel.DTFC' :
			'mousewheel.DTFC';

		if ( that.s.iLeftColumns > 0 ) {
			// When scrolling the left column, scroll the body and right column
			$(that.dom.grid.left.liner)
				.on( 'mouseover.DTFC touchstart.DTFC', function () {
					if ( ! mouseDown ) {
						mouseController = 'left';
					}
				} )
				.on( 'scroll.DTFC', function ( e ) {
					if ( ! mouseController && e.originalEvent ) {
						mouseController = 'left';
					}

					if ( mouseController === 'left' ) {
						that.dom.scroller.scrollTop = that.dom.grid.left.liner.scrollTop;
						if ( that.s.iRightColumns > 0 ) {
							that.dom.grid.right.liner.scrollTop = that.dom.grid.left.liner.scrollTop;
						}
					}
				} )
				.on( wheelType, function(e) {
					// Pass horizontal scrolling through
					var xDelta = e.type === 'wheel' ?
						-e.originalEvent.deltaX :
						e.originalEvent.wheelDeltaX;
					that.dom.scroller.scrollLeft -= xDelta;
				} );
		}

		if ( that.s.iRightColumns > 0 ) {
			// When scrolling the right column, scroll the body and the left column
			$(that.dom.grid.right.liner)
				.on( 'mouseover.DTFC touchstart.DTFC', function () {
					if ( ! mouseDown ) {
						mouseController = 'right';
					}
				} )
				.on( 'scroll.DTFC', function ( e ) {
					if ( ! mouseController && e.originalEvent ) {
						mouseController = 'right';
					}

					if ( mouseController === 'right' ) {
						that.dom.scroller.scrollTop = that.dom.grid.right.liner.scrollTop;
						if ( that.s.iLeftColumns > 0 ) {
							that.dom.grid.left.liner.scrollTop = that.dom.grid.right.liner.scrollTop;
						}
					}
				} )
				.on( wheelType, function(e) {
					// Pass horizontal scrolling through
					var xDelta = e.type === 'wheel' ?
						-e.originalEvent.deltaX :
						e.originalEvent.wheelDeltaX;
					that.dom.scroller.scrollLeft -= xDelta;
				} );
		}

		$(window).on( 'resize.DTFC', function () {
			that._fnGridLayout.call( that );
		} );

		var bFirstDraw = true;
		var jqTable = $(this.s.dt.nTable);

		jqTable
			.on( 'draw.dt.DTFC', function () {
				that._fnColCalc();
				that._fnDraw.call( that, bFirstDraw );
				bFirstDraw = false;
			} )
			.on( 'column-sizing.dt.DTFC', function () {
				that._fnColCalc();
				that._fnGridLayout( that );
			} )
			.on( 'column-visibility.dt.DTFC', function ( e, settings, column, vis, recalc ) {
				if ( recalc === undefined || recalc ) {
					that._fnColCalc();
					that._fnGridLayout( that );
					that._fnDraw( true );
				}
			} )
			.on( 'select.dt.DTFC deselect.dt.DTFC', function ( e, dt, type, indexes ) {
				if ( e.namespace === 'dt' ) {
					that._fnDraw( false );
				}
			} )
			.on( 'destroy.dt.DTFC', function () {
				jqTable.off( '.DTFC' );

				$(that.dom.scroller).off( '.DTFC' );
				$(window).off( '.DTFC' );
				$(that.s.dt.nTableWrapper).off( '.DTFC' );

				$(that.dom.grid.left.liner).off( '.DTFC '+wheelType );
				$(that.dom.grid.left.wrapper).remove();

				$(that.dom.grid.right.liner).off( '.DTFC '+wheelType );
				$(that.dom.grid.right.wrapper).remove();
			} );

		/* Get things right to start with - note that due to adjusting the columns, there must be
		 * another redraw of the main table. It doesn't need to be a full redraw however.
		 */
		this._fnGridLayout();
		this.s.dt.oInstance.fnDraw(false);
	},


	/**
	 * Calculate the column widths for the grid layout
	 *  @returns {void}
	 *  @private
	 */
	"_fnColCalc": function ()
	{
		var that = this;
		var iLeftWidth = 0;
		var iRightWidth = 0;

		this.s.aiInnerWidths = [];
		this.s.aiOuterWidths = [];

		$.each( this.s.dt.aoColumns, function (i, col) {
			var th = $(col.nTh);
			var border;

			if ( ! th.filter(':visible').length ) {
				that.s.aiInnerWidths.push( 0 );
				that.s.aiOuterWidths.push( 0 );
			}
			else
			{
				// Inner width is used to assign widths to cells
				// Outer width is used to calculate the container
				var iWidth = th.outerWidth();

				// When working with the left most-cell, need to add on the
				// table's border to the outerWidth, since we need to take
				// account of it, but it isn't in any cell
				if ( that.s.aiOuterWidths.length === 0 ) {
					border = $(that.s.dt.nTable).css('border-left-width');
					iWidth += typeof border === 'string' && border.indexOf('px') === -1 ?
						1 :
						parseInt( border, 10 );
				}

				// Likewise with the final column on the right
				if ( that.s.aiOuterWidths.length === that.s.dt.aoColumns.length-1 ) {
					border = $(that.s.dt.nTable).css('border-right-width');
					iWidth += typeof border === 'string' && border.indexOf('px') === -1 ?
						1 :
						parseInt( border, 10 );
				}

				that.s.aiOuterWidths.push( iWidth );
				that.s.aiInnerWidths.push( th.width() );

				if ( i < that.s.iLeftColumns )
				{
					iLeftWidth += iWidth;
				}

				if ( that.s.iTableColumns-that.s.iRightColumns <= i )
				{
					iRightWidth += iWidth;
				}
			}
		} );

		this.s.iLeftWidth = iLeftWidth;
		this.s.iRightWidth = iRightWidth;
	},


	/**
	 * Set up the DOM for the fixed column. The way the layout works is to create a 1x3 grid
	 * for the left column, the DataTable (for which we just reuse the scrolling element DataTable
	 * puts into the DOM) and the right column. In each of he two fixed column elements there is a
	 * grouping wrapper element and then a head, body and footer wrapper. In each of these we then
	 * place the cloned header, body or footer tables. This effectively gives as 3x3 grid structure.
	 *  @returns {void}
	 *  @private
	 */
	"_fnGridSetup": function ()
	{
		var that = this;
		var oOverflow = this._fnDTOverflow();
		var block;

		this.dom.body = this.s.dt.nTable;
		this.dom.header = this.s.dt.nTHead.parentNode;
		this.dom.header.parentNode.parentNode.style.position = "relative";

		var nSWrapper =
			$('<div class="DTFC_ScrollWrapper" style="position:relative; clear:both;">'+
				'<div class="DTFC_LeftWrapper" style="position:absolute; top:0; left:0;" aria-hidden="true">'+
					'<div class="DTFC_LeftHeadWrapper" style="position:relative; top:0; left:0; overflow:hidden;"></div>'+
					'<div class="DTFC_LeftBodyWrapper" style="position:relative; top:0; left:0; height:0; overflow:hidden;">'+
						'<div class="DTFC_LeftBodyLiner" style="position:relative; top:0; left:0; overflow-y:scroll;"></div>'+
					'</div>'+
					'<div class="DTFC_LeftFootWrapper" style="position:relative; top:0; left:0; overflow:hidden;"></div>'+
				'</div>'+
				'<div class="DTFC_RightWrapper" style="position:absolute; top:0; right:0;" aria-hidden="true">'+
					'<div class="DTFC_RightHeadWrapper" style="position:relative; top:0; left:0;">'+
						'<div class="DTFC_RightHeadBlocker DTFC_Blocker" style="position:absolute; top:0; bottom:0;"></div>'+
					'</div>'+
					'<div class="DTFC_RightBodyWrapper" style="position:relative; top:0; left:0; height:0; overflow:hidden;">'+
						'<div class="DTFC_RightBodyLiner" style="position:relative; top:0; left:0; overflow-y:scroll;"></div>'+
					'</div>'+
					'<div class="DTFC_RightFootWrapper" style="position:relative; top:0; left:0;">'+
						'<div class="DTFC_RightFootBlocker DTFC_Blocker" style="position:absolute; top:0; bottom:0;"></div>'+
					'</div>'+
				'</div>'+
			'</div>')[0];
		var nLeft = nSWrapper.childNodes[0];
		var nRight = nSWrapper.childNodes[1];

		this.dom.grid.dt.parentNode.insertBefore( nSWrapper, this.dom.grid.dt );
		nSWrapper.appendChild( this.dom.grid.dt );

		this.dom.grid.wrapper = nSWrapper;

		if ( this.s.iLeftColumns > 0 )
		{
			this.dom.grid.left.wrapper = nLeft;
			this.dom.grid.left.head = nLeft.childNodes[0];
			this.dom.grid.left.body = nLeft.childNodes[1];
			this.dom.grid.left.liner = $('div.DTFC_LeftBodyLiner', nSWrapper)[0];

			nSWrapper.appendChild( nLeft );
		}

		if ( this.s.iRightColumns > 0 )
		{
			this.dom.grid.right.wrapper = nRight;
			this.dom.grid.right.head = nRight.childNodes[0];
			this.dom.grid.right.body = nRight.childNodes[1];
			this.dom.grid.right.liner = $('div.DTFC_RightBodyLiner', nSWrapper)[0];

			nRight.style.right = oOverflow.bar+"px";

			block = $('div.DTFC_RightHeadBlocker', nSWrapper)[0];
			block.style.width = oOverflow.bar+"px";
			block.style.right = -oOverflow.bar+"px";
			this.dom.grid.right.headBlock = block;

			block = $('div.DTFC_RightFootBlocker', nSWrapper)[0];
			block.style.width = oOverflow.bar+"px";
			block.style.right = -oOverflow.bar+"px";
			this.dom.grid.right.footBlock = block;

			nSWrapper.appendChild( nRight );
		}

		if ( this.s.dt.nTFoot )
		{
			this.dom.footer = this.s.dt.nTFoot.parentNode;
			if ( this.s.iLeftColumns > 0 )
			{
				this.dom.grid.left.foot = nLeft.childNodes[2];
			}
			if ( this.s.iRightColumns > 0 )
			{
				this.dom.grid.right.foot = nRight.childNodes[2];
			}
		}

		// RTL support - swap the position of the left and right columns (#48)
		if ( this.s.rtl ) {
			$('div.DTFC_RightHeadBlocker', nSWrapper).css( {
				left: -oOverflow.bar+'px',
				right: ''
			} );
		}
	},


	/**
	 * Style and position the grid used for the FixedColumns layout
	 *  @returns {void}
	 *  @private
	 */
	"_fnGridLayout": function ()
	{
		var that = this;
		var oGrid = this.dom.grid;
		var iWidth = $(oGrid.wrapper).width();
		var iBodyHeight = this.s.dt.nTable.parentNode.offsetHeight;
		var iFullHeight = this.s.dt.nTable.parentNode.parentNode.offsetHeight;
		var oOverflow = this._fnDTOverflow();
		var iLeftWidth = this.s.iLeftWidth;
		var iRightWidth = this.s.iRightWidth;
		var rtl = $(this.dom.body).css('direction') === 'rtl';
		var wrapper;
		var scrollbarAdjust = function ( node, width ) {
			if ( ! oOverflow.bar ) {
				// If there is no scrollbar (Macs) we need to hide the auto scrollbar
				node.style.width = (width+20)+"px";
				node.style.paddingRight = "20px";
				node.style.boxSizing = "border-box";
			}
			else if ( that._firefoxScrollError() ) {
				// See the above function for why this is required
				if ( $(node).height() > 34 ) {
					node.style.width = (width+oOverflow.bar)+"px";
				}
			}
			else {
				// Otherwise just overflow by the scrollbar
				node.style.width = (width+oOverflow.bar)+"px";
			}
		};

		// When x scrolling - don't paint the fixed columns over the x scrollbar
		if ( oOverflow.x )
		{
			iBodyHeight -= oOverflow.bar;
		}

		oGrid.wrapper.style.height = iFullHeight+"px";

		if ( this.s.iLeftColumns > 0 )
		{
			wrapper = oGrid.left.wrapper;
			wrapper.style.width = iLeftWidth+'px';
			wrapper.style.height = '1px';

			// Swap the position of the left and right columns for rtl (#48)
			// This is always up against the edge, scrollbar on the far side
			if ( rtl ) {
				wrapper.style.left = '';
				wrapper.style.right = 0;
			}
			else {
				wrapper.style.left = 0;
				wrapper.style.right = '';
			}

			oGrid.left.body.style.height = iBodyHeight+"px";
			if ( oGrid.left.foot ) {
				oGrid.left.foot.style.top = (oOverflow.x ? oOverflow.bar : 0)+"px"; // shift footer for scrollbar
			}

			scrollbarAdjust( oGrid.left.liner, iLeftWidth );
			oGrid.left.liner.style.height = iBodyHeight+"px";
			oGrid.left.liner.style.maxHeight = iBodyHeight+"px";
		}

		if ( this.s.iRightColumns > 0 )
		{
			wrapper = oGrid.right.wrapper;
			wrapper.style.width = iRightWidth+'px';
			wrapper.style.height = '1px';

			// Need to take account of the vertical scrollbar
			if ( this.s.rtl ) {
				wrapper.style.left = oOverflow.y ? oOverflow.bar+'px' : 0;
				wrapper.style.right = '';
			}
			else {
				wrapper.style.left = '';
				wrapper.style.right = oOverflow.y ? oOverflow.bar+'px' : 0;
			}

			oGrid.right.body.style.height = iBodyHeight+"px";
			if ( oGrid.right.foot ) {
				oGrid.right.foot.style.top = (oOverflow.x ? oOverflow.bar : 0)+"px";
			}

			scrollbarAdjust( oGrid.right.liner, iRightWidth );
			oGrid.right.liner.style.height = iBodyHeight+"px";
			oGrid.right.liner.style.maxHeight = iBodyHeight+"px";

			oGrid.right.headBlock.style.display = oOverflow.y ? 'block' : 'none';
			oGrid.right.footBlock.style.display = oOverflow.y ? 'block' : 'none';
		}
	},


	/**
	 * Get information about the DataTable's scrolling state - specifically if the table is scrolling
	 * on either the x or y axis, and also the scrollbar width.
	 *  @returns {object} Information about the DataTables scrolling state with the properties:
	 *    'x', 'y' and 'bar'
	 *  @private
	 */
	"_fnDTOverflow": function ()
	{
		var nTable = this.s.dt.nTable;
		var nTableScrollBody = nTable.parentNode;
		var out = {
			"x": false,
			"y": false,
			"bar": this.s.dt.oScroll.iBarWidth
		};

		if ( nTable.offsetWidth > nTableScrollBody.clientWidth )
		{
			out.x = true;
		}

		if ( nTable.offsetHeight > nTableScrollBody.clientHeight )
		{
			out.y = true;
		}

		return out;
	},


	/**
	 * Clone and position the fixed columns
	 *  @returns {void}
	 *  @param   {Boolean} bAll Indicate if the header and footer should be updated as well (true)
	 *  @private
	 */
	"_fnDraw": function ( bAll )
	{
		this._fnGridLayout();
		this._fnCloneLeft( bAll );
		this._fnCloneRight( bAll );

		/* Draw callback function */
		if ( this.s.fnDrawCallback !== null )
		{
			this.s.fnDrawCallback.call( this, this.dom.clone.left, this.dom.clone.right );
		}

		/* Event triggering */
		$(this).trigger( 'draw.dtfc', {
			"leftClone": this.dom.clone.left,
			"rightClone": this.dom.clone.right
		} );
	},


	/**
	 * Clone the right columns
	 *  @returns {void}
	 *  @param   {Boolean} bAll Indicate if the header and footer should be updated as well (true)
	 *  @private
	 */
	"_fnCloneRight": function ( bAll )
	{
		if ( this.s.iRightColumns <= 0 ) {
			return;
		}

		var that = this,
			i, jq,
			aiColumns = [];

		for ( i=this.s.iTableColumns-this.s.iRightColumns ; i<this.s.iTableColumns ; i++ ) {
			if ( this.s.dt.aoColumns[i].bVisible ) {
				aiColumns.push( i );
			}
		}

		this._fnClone( this.dom.clone.right, this.dom.grid.right, aiColumns, bAll );
	},


	/**
	 * Clone the left columns
	 *  @returns {void}
	 *  @param   {Boolean} bAll Indicate if the header and footer should be updated as well (true)
	 *  @private
	 */
	"_fnCloneLeft": function ( bAll )
	{
		if ( this.s.iLeftColumns <= 0 ) {
			return;
		}

		var that = this,
			i, jq,
			aiColumns = [];

		for ( i=0 ; i<this.s.iLeftColumns ; i++ ) {
			if ( this.s.dt.aoColumns[i].bVisible ) {
				aiColumns.push( i );
			}
		}

		this._fnClone( this.dom.clone.left, this.dom.grid.left, aiColumns, bAll );
	},


	/**
	 * Make a copy of the layout object for a header or footer element from DataTables. Note that
	 * this method will clone the nodes in the layout object.
	 *  @returns {Array} Copy of the layout array
	 *  @param   {Object} aoOriginal Layout array from DataTables (aoHeader or aoFooter)
	 *  @param   {Object} aiColumns Columns to copy
	 *  @param   {boolean} events Copy cell events or not
	 *  @private
	 */
	"_fnCopyLayout": function ( aoOriginal, aiColumns, events )
	{
		var aReturn = [];
		var aClones = [];
		var aCloned = [];

		for ( var i=0, iLen=aoOriginal.length ; i<iLen ; i++ )
		{
			var aRow = [];
			aRow.nTr = $(aoOriginal[i].nTr).clone(events, false)[0];

			for ( var j=0, jLen=this.s.iTableColumns ; j<jLen ; j++ )
			{
				if ( $.inArray( j, aiColumns ) === -1 )
				{
					continue;
				}

				var iCloned = $.inArray( aoOriginal[i][j].cell, aCloned );
				if ( iCloned === -1 )
				{
					var nClone = $(aoOriginal[i][j].cell).clone(events, false)[0];
					aClones.push( nClone );
					aCloned.push( aoOriginal[i][j].cell );

					aRow.push( {
						"cell": nClone,
						"unique": aoOriginal[i][j].unique
					} );
				}
				else
				{
					aRow.push( {
						"cell": aClones[ iCloned ],
						"unique": aoOriginal[i][j].unique
					} );
				}
			}

			aReturn.push( aRow );
		}

		return aReturn;
	},


	/**
	 * Clone the DataTable nodes and place them in the DOM (sized correctly)
	 *  @returns {void}
	 *  @param   {Object} oClone Object containing the header, footer and body cloned DOM elements
	 *  @param   {Object} oGrid Grid object containing the display grid elements for the cloned
	 *                    column (left or right)
	 *  @param   {Array} aiColumns Column indexes which should be operated on from the DataTable
	 *  @param   {Boolean} bAll Indicate if the header and footer should be updated as well (true)
	 *  @private
	 */
	"_fnClone": function ( oClone, oGrid, aiColumns, bAll )
	{
		var that = this,
			i, iLen, j, jLen, jq, nTarget, iColumn, nClone, iIndex, aoCloneLayout,
			jqCloneThead, aoFixedHeader,
			dt = this.s.dt;

		/*
		 * Header
		 */
		if ( bAll )
		{
			$(oClone.header).remove();

			oClone.header = $(this.dom.header).clone(true, false)[0];
			oClone.header.className += " DTFC_Cloned";
			oClone.header.style.width = "100%";
			oGrid.head.appendChild( oClone.header );

			/* Copy the DataTables layout cache for the header for our floating column */
			aoCloneLayout = this._fnCopyLayout( dt.aoHeader, aiColumns, true );
			jqCloneThead = $('>thead', oClone.header);
			jqCloneThead.empty();

			/* Add the created cloned TR elements to the table */
			for ( i=0, iLen=aoCloneLayout.length ; i<iLen ; i++ )
			{
				jqCloneThead[0].appendChild( aoCloneLayout[i].nTr );
			}

			/* Use the handy _fnDrawHead function in DataTables to do the rowspan/colspan
			 * calculations for us
			 */
			dt.oApi._fnDrawHead( dt, aoCloneLayout, true );
		}
		else
		{
			/* To ensure that we copy cell classes exactly, regardless of colspan, multiple rows
			 * etc, we make a copy of the header from the DataTable again, but don't insert the
			 * cloned cells, just copy the classes across. To get the matching layout for the
			 * fixed component, we use the DataTables _fnDetectHeader method, allowing 1:1 mapping
			 */
			aoCloneLayout = this._fnCopyLayout( dt.aoHeader, aiColumns, false );
			aoFixedHeader=[];

			dt.oApi._fnDetectHeader( aoFixedHeader, $('>thead', oClone.header)[0] );

			for ( i=0, iLen=aoCloneLayout.length ; i<iLen ; i++ )
			{
				for ( j=0, jLen=aoCloneLayout[i].length ; j<jLen ; j++ )
				{
					aoFixedHeader[i][j].cell.className = aoCloneLayout[i][j].cell.className;

					// If jQuery UI theming is used we need to copy those elements as well
					$('span.DataTables_sort_icon', aoFixedHeader[i][j].cell).each( function () {
						this.className = $('span.DataTables_sort_icon', aoCloneLayout[i][j].cell)[0].className;
					} );
				}
			}
		}
		this._fnEqualiseHeights( 'thead', this.dom.header, oClone.header );

		/*
		 * Body
		 */
		if ( this.s.sHeightMatch == 'auto' )
		{
			/* Remove any heights which have been applied already and let the browser figure it out */
			$('>tbody>tr', that.dom.body).css('height', 'auto');
		}

		if ( oClone.body !== null )
		{
			$(oClone.body).remove();
			oClone.body = null;
		}

		oClone.body = $(this.dom.body).clone(true)[0];
		oClone.body.className += " DTFC_Cloned";
		oClone.body.style.paddingBottom = dt.oScroll.iBarWidth+"px";
		oClone.body.style.marginBottom = (dt.oScroll.iBarWidth*2)+"px"; /* For IE */
		if ( oClone.body.getAttribute('id') !== null )
		{
			oClone.body.removeAttribute('id');
		}

		$('>thead>tr', oClone.body).empty();
		$('>tfoot', oClone.body).remove();

		var nBody = $('tbody', oClone.body)[0];
		$(nBody).empty();
		if ( dt.aiDisplay.length > 0 )
		{
			/* Copy the DataTables' header elements to force the column width in exactly the
			 * same way that DataTables does it - have the header element, apply the width and
			 * colapse it down
			 */
			var nInnerThead = $('>thead>tr', oClone.body)[0];
			for ( iIndex=0 ; iIndex<aiColumns.length ; iIndex++ )
			{
				iColumn = aiColumns[iIndex];

				nClone = $(dt.aoColumns[iColumn].nTh).clone(true)[0];
				nClone.innerHTML = "";

				var oStyle = nClone.style;
				oStyle.paddingTop = "0";
				oStyle.paddingBottom = "0";
				oStyle.borderTopWidth = "0";
				oStyle.borderBottomWidth = "0";
				oStyle.height = 0;
				oStyle.width = that.s.aiInnerWidths[iColumn]+"px";

				nInnerThead.appendChild( nClone );
			}

			/* Add in the tbody elements, cloning form the master table */
			$('>tbody>tr', that.dom.body).each( function (z) {
				var i = that.s.dt.oFeatures.bServerSide===false ?
					that.s.dt.aiDisplay[ that.s.dt._iDisplayStart+z ] : z;
				var aTds = that.s.dt.aoData[ i ].anCells || $(this).children('td, th');

				var n = this.cloneNode(false);
				n.removeAttribute('id');
				n.setAttribute( 'data-dt-row', i );

				for ( iIndex=0 ; iIndex<aiColumns.length ; iIndex++ )
				{
					iColumn = aiColumns[iIndex];

					if ( aTds.length > 0 )
					{
						nClone = $( aTds[iColumn] ).clone(true, true)[0];
						nClone.removeAttribute( 'id' );
						nClone.setAttribute( 'data-dt-row', i );
						nClone.setAttribute( 'data-dt-column', iColumn );
						n.appendChild( nClone );
					}
				}
				nBody.appendChild( n );
			} );
		}
		else
		{
			$('>tbody>tr', that.dom.body).each( function (z) {
				nClone = this.cloneNode(true);
				nClone.className += ' DTFC_NoData';
				$('td', nClone).html('');
				nBody.appendChild( nClone );
			} );
		}

		oClone.body.style.width = "100%";
		oClone.body.style.margin = "0";
		oClone.body.style.padding = "0";

		// Interop with Scroller - need to use a height forcing element in the
		// scrolling area in the same way that Scroller does in the body scroll.
		if ( dt.oScroller !== undefined )
		{
			var scrollerForcer = dt.oScroller.dom.force;

			if ( ! oGrid.forcer ) {
				oGrid.forcer = scrollerForcer.cloneNode( true );
				oGrid.liner.appendChild( oGrid.forcer );
			}
			else {
				oGrid.forcer.style.height = scrollerForcer.style.height;
			}
		}

		oGrid.liner.appendChild( oClone.body );

		this._fnEqualiseHeights( 'tbody', that.dom.body, oClone.body );

		/*
		 * Footer
		 */
		if ( dt.nTFoot !== null )
		{
			if ( bAll )
			{
				if ( oClone.footer !== null )
				{
					oClone.footer.parentNode.removeChild( oClone.footer );
				}
				oClone.footer = $(this.dom.footer).clone(true, true)[0];
				oClone.footer.className += " DTFC_Cloned";
				oClone.footer.style.width = "100%";
				oGrid.foot.appendChild( oClone.footer );

				/* Copy the footer just like we do for the header */
				aoCloneLayout = this._fnCopyLayout( dt.aoFooter, aiColumns, true );
				var jqCloneTfoot = $('>tfoot', oClone.footer);
				jqCloneTfoot.empty();

				for ( i=0, iLen=aoCloneLayout.length ; i<iLen ; i++ )
				{
					jqCloneTfoot[0].appendChild( aoCloneLayout[i].nTr );
				}
				dt.oApi._fnDrawHead( dt, aoCloneLayout, true );
			}
			else
			{
				aoCloneLayout = this._fnCopyLayout( dt.aoFooter, aiColumns, false );
				var aoCurrFooter=[];

				dt.oApi._fnDetectHeader( aoCurrFooter, $('>tfoot', oClone.footer)[0] );

				for ( i=0, iLen=aoCloneLayout.length ; i<iLen ; i++ )
				{
					for ( j=0, jLen=aoCloneLayout[i].length ; j<jLen ; j++ )
					{
						aoCurrFooter[i][j].cell.className = aoCloneLayout[i][j].cell.className;
					}
				}
			}
			this._fnEqualiseHeights( 'tfoot', this.dom.footer, oClone.footer );
		}

		/* Equalise the column widths between the header footer and body - body get's priority */
		var anUnique = dt.oApi._fnGetUniqueThs( dt, $('>thead', oClone.header)[0] );
		$(anUnique).each( function (i) {
			iColumn = aiColumns[i];
			this.style.width = that.s.aiInnerWidths[iColumn]+"px";
		} );

		if ( that.s.dt.nTFoot !== null )
		{
			anUnique = dt.oApi._fnGetUniqueThs( dt, $('>tfoot', oClone.footer)[0] );
			$(anUnique).each( function (i) {
				iColumn = aiColumns[i];
				this.style.width = that.s.aiInnerWidths[iColumn]+"px";
			} );
		}
	},


	/**
	 * From a given table node (THEAD etc), get a list of TR direct child elements
	 *  @param   {Node} nIn Table element to search for TR elements (THEAD, TBODY or TFOOT element)
	 *  @returns {Array} List of TR elements found
	 *  @private
	 */
	"_fnGetTrNodes": function ( nIn )
	{
		var aOut = [];
		for ( var i=0, iLen=nIn.childNodes.length ; i<iLen ; i++ )
		{
			if ( nIn.childNodes[i].nodeName.toUpperCase() == "TR" )
			{
				aOut.push( nIn.childNodes[i] );
			}
		}
		return aOut;
	},


	/**
	 * Equalise the heights of the rows in a given table node in a cross browser way
	 *  @returns {void}
	 *  @param   {String} nodeName Node type - thead, tbody or tfoot
	 *  @param   {Node} original Original node to take the heights from
	 *  @param   {Node} clone Copy the heights to
	 *  @private
	 */
	"_fnEqualiseHeights": function ( nodeName, original, clone )
	{
		if ( this.s.sHeightMatch == 'none' && nodeName !== 'thead' && nodeName !== 'tfoot' )
		{
			return;
		}

		var that = this,
			i, iLen, iHeight, iHeight2, iHeightOriginal, iHeightClone,
			rootOriginal = original.getElementsByTagName(nodeName)[0],
			rootClone    = clone.getElementsByTagName(nodeName)[0],
			jqBoxHack    = $('>'+nodeName+'>tr:eq(0)', original).children(':first'),
			iBoxHack     = jqBoxHack.outerHeight() - jqBoxHack.height(),
			anOriginal   = this._fnGetTrNodes( rootOriginal ),
			anClone      = this._fnGetTrNodes( rootClone ),
			heights      = [];

		for ( i=0, iLen=anClone.length ; i<iLen ; i++ )
		{
			iHeightOriginal = anOriginal[i].offsetHeight;
			iHeightClone = anClone[i].offsetHeight;
			iHeight = iHeightClone > iHeightOriginal ? iHeightClone : iHeightOriginal;

			if ( this.s.sHeightMatch == 'semiauto' )
			{
				anOriginal[i]._DTTC_iHeight = iHeight;
			}

			heights.push( iHeight );
		}

		for ( i=0, iLen=anClone.length ; i<iLen ; i++ )
		{
			anClone[i].style.height = heights[i]+"px";
			anOriginal[i].style.height = heights[i]+"px";
		}
	},

	/**
	 * Determine if the UA suffers from Firefox's overflow:scroll scrollbars
	 * not being shown bug.
	 *
	 * Firefox doesn't draw scrollbars, even if it is told to using
	 * overflow:scroll, if the div is less than 34px height. See bugs 292284 and
	 * 781885. Using UA detection here since this is particularly hard to detect
	 * using objects - its a straight up rendering error in Firefox.
	 *
	 * @return {boolean} True if Firefox error is present, false otherwise
	 */
	_firefoxScrollError: function () {
		if ( _firefoxScroll === undefined ) {
			var test = $('<div/>')
				.css( {
					position: 'absolute',
					top: 0,
					left: 0,
					height: 10,
					width: 50,
					overflow: 'scroll'
				} )
				.appendTo( 'body' );

			// Make sure this doesn't apply on Macs with 0 width scrollbars
			_firefoxScroll = (
				test[0].clientWidth === test[0].offsetWidth && this._fnDTOverflow().bar !== 0
			);

			test.remove();
		}

		return _firefoxScroll;
	}
} );



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Statics
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**
 * FixedColumns default settings for initialisation
 *  @name FixedColumns.defaults
 *  @namespace
 *  @static
 */
FixedColumns.defaults = /** @lends FixedColumns.defaults */{
	/**
	 * Number of left hand columns to fix in position
	 *  @type     int
	 *  @default  1
	 *  @static
	 *  @example
	 *      var  = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      new $.fn.dataTable.fixedColumns( table, {
	 *          "leftColumns": 2
	 *      } );
	 */
	"iLeftColumns": 1,

	/**
	 * Number of right hand columns to fix in position
	 *  @type     int
	 *  @default  0
	 *  @static
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      new $.fn.dataTable.fixedColumns( table, {
	 *          "rightColumns": 1
	 *      } );
	 */
	"iRightColumns": 0,

	/**
	 * Draw callback function which is called when FixedColumns has redrawn the fixed assets
	 *  @type     function(object, object):void
	 *  @default  null
	 *  @static
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      new $.fn.dataTable.fixedColumns( table, {
	 *          "drawCallback": function () {
	 *	            alert( "FixedColumns redraw" );
	 *	        }
	 *      } );
	 */
	"fnDrawCallback": null,

	/**
	 * Height matching algorthim to use. This can be "none" which will result in no height
	 * matching being applied by FixedColumns (height matching could be forced by CSS in this
	 * case), "semiauto" whereby the height calculation will be performed once, and the result
	 * cached to be used again (fnRecalculateHeight can be used to force recalculation), or
	 * "auto" when height matching is performed on every draw (slowest but must accurate)
	 *  @type     string
	 *  @default  semiauto
	 *  @static
	 *  @example
	 *      var table = $('#example').dataTable( {
	 *          "scrollX": "100%"
	 *      } );
	 *      new $.fn.dataTable.fixedColumns( table, {
	 *          "heightMatch": "auto"
	 *      } );
	 */
	"sHeightMatch": "semiauto"
};




/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Constants
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**
 * FixedColumns version
 *  @name      FixedColumns.version
 *  @type      String
 *  @default   See code
 *  @static
 */
FixedColumns.version = "3.8.0";



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * DataTables API integration
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

DataTable.Api.register( 'fixedColumns()', function () {
	return this;
} );

DataTable.Api.register( 'fixedColumns().update()', function () {
	return this.iterator( 'table', function ( ctx ) {
		if ( ctx._oFixedColumns ) {
			ctx._oFixedColumns.fnUpdate();
		}
	} );
} );

DataTable.Api.register( 'fixedColumns().relayout()', function () {
	return this.iterator( 'table', function ( ctx ) {
		if ( ctx._oFixedColumns ) {
			ctx._oFixedColumns.fnRedrawLayout();
		}
	} );
} );

DataTable.Api.register( 'rows().recalcHeight()', function () {
	return this.iterator( 'row', function ( ctx, idx ) {
		if ( ctx._oFixedColumns ) {
			ctx._oFixedColumns.fnRecalculateHeight( this.row(idx).node() );
		}
	} );
} );

DataTable.Api.register( 'fixedColumns().rowIndex()', function ( row ) {
	row = $(row);

	return row.parents('.DTFC_Cloned').length ?
		this.rows( { page: 'current' } ).indexes()[ row.index() ] :
		this.row( row ).index();
} );

DataTable.Api.register( 'fixedColumns().cellIndex()', function ( cell ) {
	cell = $(cell);

	if ( cell.parents('.DTFC_Cloned').length ) {
		var rowClonedIdx = cell.parent().index();
		var rowIdx = this.rows( { page: 'current' } ).indexes()[ rowClonedIdx ];
		var columnIdx;

		if ( cell.parents('.DTFC_LeftWrapper').length ) {
			columnIdx = cell.index();
		}
		else {
			var columns = this.columns().flatten().length;
			columnIdx = columns - this.context[0]._oFixedColumns.s.iRightColumns + cell.index();
		}

		return {
			row: rowIdx,
			column: this.column.index( 'toData', columnIdx ),
			columnVisible: columnIdx
		};
	}
	else {
		return this.cell( cell ).index();
	}
} );

DataTable.Api.registerPlural( 'cells().fixedNodes()', 'cell().fixedNode()', function () {
	return this.iterator( 'cell', function ( settings, row, column ) {
		return settings._oFixedColumns
			? settings._oFixedColumns.fnToFixedNode( row, column )
			: this.node();
	}, 1 );
} );




/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Initialisation
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

// Attach a listener to the document which listens for DataTables initialisation
// events so we can automatically initialise
$(document).on( 'init.dt.fixedColumns', function (e, settings) {
	if ( e.namespace !== 'dt' ) {
		return;
	}

	var init = settings.oInit.fixedColumns;
	var defaults = DataTable.defaults.fixedColumns;

	if ( init || defaults ) {
		var opts = $.extend( {}, init, defaults );

		if ( init !== false ) {
			new FixedColumns( settings, opts );
		}
	}
} );



// Make FixedColumns accessible from the DataTables instance
$.fn.dataTable.FixedColumns = FixedColumns;
$.fn.DataTable.FixedColumns = FixedColumns;

return FixedColumns;
}));