/*! Select for DataTables 1.2.2
 * 2015-2016 SpryMedia Ltd - datatables.net/license/mit
 */

/**
 * @summary     Select for DataTables
 * @description A collection of API methods, events and buttons for DataTables
 *   that provides selection options of the items in a DataTable
 * @version     1.2.2
 * @file        dataTables.select.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     datatables.net/forums
 * @copyright   Copyright 2015-2016 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/extensions/select
 */
(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;


// Version information for debugger
DataTable.select = {};

DataTable.select.version = '1.2.2';

DataTable.select.init = function ( dt ) {
	var ctx = dt.settings()[0];
	var init = ctx.oInit.select;
	var defaults = DataTable.defaults.select;
	var opts = init === undefined ?
		defaults :
		init;

	// Set defaults
	var items = 'row';
	var style = 'api';
	var blurable = false;
	var info = true;
	var selector = 'td, th';
	var className = 'selected';
	var setStyle = false;

	ctx._select = {};

	// Initialisation customisations
	if ( opts === true ) {
		style = 'os';
		setStyle = true;
	}
	else if ( typeof opts === 'string' ) {
		style = opts;
		setStyle = true;
	}
	else if ( $.isPlainObject( opts ) ) {
		if ( opts.blurable !== undefined ) {
			blurable = opts.blurable;
		}

		if ( opts.info !== undefined ) {
			info = opts.info;
		}

		if ( opts.items !== undefined ) {
			items = opts.items;
		}

		if ( opts.style !== undefined ) {
			style = opts.style;
			setStyle = true;
		}

		if ( opts.selector !== undefined ) {
			selector = opts.selector;
		}

		if ( opts.className !== undefined ) {
			className = opts.className;
		}
	}

	dt.select.selector( selector );
	dt.select.items( items );
	dt.select.style( style );
	dt.select.blurable( blurable );
	dt.select.info( info );
	ctx._select.className = className;


	// Sort table based on selected rows. Requires Select Datatables extension
	$.fn.dataTable.ext.order['select-checkbox'] = function ( settings, col ) {
		return this.api().column( col, {order: 'index'} ).nodes().map( function ( td ) {
			if ( settings._select.items === 'row' ) {
				return $( td ).parent().hasClass( settings._select.className );
			} else if ( settings._select.items === 'cell' ) {
				return $( td ).hasClass( settings._select.className );
			}
			return false;
		});
	};

	// If the init options haven't enabled select, but there is a selectable
	// class name, then enable
	if ( ! setStyle && $( dt.table().node() ).hasClass( 'selectable' ) ) {
		dt.select.style( 'os' );
	}
};

/*

Select is a collection of API methods, event handlers, event emitters and
buttons (for the `Buttons` extension) for DataTables. It provides the following
features, with an overview of how they are implemented:

## Selection of rows, columns and cells. Whether an item is selected or not is
   stored in:

* rows: a `_select_selected` property which contains a boolean value of the
  DataTables' `aoData` object for each row
* columns: a `_select_selected` property which contains a boolean value of the
  DataTables' `aoColumns` object for each column
* cells: a `_selected_cells` property which contains an array of boolean values
  of the `aoData` object for each row. The array is the same length as the
  columns array, with each element of it representing a cell.

This method of using boolean flags allows Select to operate when nodes have not
been created for rows / cells (DataTables' defer rendering feature).

## API methods

A range of API methods are available for triggering selection and de-selection
of rows. Methods are also available to configure the selection events that can
be triggered by an end user (such as which items are to be selected). To a large
extent, these of API methods *is* Select. It is basically a collection of helper
functions that can be used to select items in a DataTable.

Configuration of select is held in the object `_select` which is attached to the
DataTables settings object on initialisation. Select being available on a table
is not optional when Select is loaded, but its default is for selection only to
be available via the API - so the end user wouldn't be able to select rows
without additional configuration.

The `_select` object contains the following properties:

```
{
	items:string     - Can be `rows`, `columns` or `cells`. Defines what item 
	                   will be selected if the user is allowed to activate row
	                   selection using the mouse.
	style:string     - Can be `none`, `single`, `multi` or `os`. Defines the
	                   interaction style when selecting items
	blurable:boolean - If row selection can be cleared by clicking outside of
	                   the table
	info:boolean     - If the selection summary should be shown in the table
	                   information elements
}
```

In addition to the API methods, Select also extends the DataTables selector
options for rows, columns and cells adding a `selected` option to the selector
options object, allowing the developer to select only selected items or
unselected items.

## Mouse selection of items

Clicking on items can be used to select items. This is done by a simple event
handler that will select the items using the API methods.

 */


/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Local functions
 */

/**
 * Add one or more cells to the selection when shift clicking in OS selection
 * style cell selection.
 *
 * Cell range is more complicated than row and column as we want to select
 * in the visible grid rather than by index in sequence. For example, if you
 * click first in cell 1-1 and then shift click in 2-2 - cells 1-2 and 2-1
 * should also be selected (and not 1-3, 1-4. etc)
 * 
 * @param  {DataTable.Api} dt   DataTable
 * @param  {object}        idx  Cell index to select to
 * @param  {object}        last Cell index to select from
 * @private
 */
function cellRange( dt, idx, last )
{
	var indexes;
	var columnIndexes;
	var rowIndexes;
	var selectColumns = function ( start, end ) {
		if ( start > end ) {
			var tmp = end;
			end = start;
			start = tmp;
		}
		
		var record = false;
		return dt.columns( ':visible' ).indexes().filter( function (i) {
			if ( i === start ) {
				record = true;
			}
			
			if ( i === end ) { // not else if, as start might === end
				record = false;
				return true;
			}

			return record;
		} );
	};

	var selectRows = function ( start, end ) {
		var indexes = dt.rows( { search: 'applied' } ).indexes();

		// Which comes first - might need to swap
		if ( indexes.indexOf( start ) > indexes.indexOf( end ) ) {
			var tmp = end;
			end = start;
			start = tmp;
		}

		var record = false;
		return indexes.filter( function (i) {
			if ( i === start ) {
				record = true;
			}
			
			if ( i === end ) {
				record = false;
				return true;
			}

			return record;
		} );
	};

	if ( ! dt.cells( { selected: true } ).any() && ! last ) {
		// select from the top left cell to this one
		columnIndexes = selectColumns( 0, idx.column );
		rowIndexes = selectRows( 0 , idx.row );
	}
	else {
		// Get column indexes between old and new
		columnIndexes = selectColumns( last.column, idx.column );
		rowIndexes = selectRows( last.row , idx.row );
	}

	indexes = dt.cells( rowIndexes, columnIndexes ).flatten();

	if ( ! dt.cells( idx, { selected: true } ).any() ) {
		// Select range
		dt.cells( indexes ).select();
	}
	else {
		// Deselect range
		dt.cells( indexes ).deselect();
	}
}

/**
 * Disable mouse selection by removing the selectors
 *
 * @param {DataTable.Api} dt DataTable to remove events from
 * @private
 */
function disableMouseSelection( dt )
{
	var ctx = dt.settings()[0];
	var selector = ctx._select.selector;

	$( dt.table().container() )
		.off( 'mousedown.dtSelect', selector )
		.off( 'mouseup.dtSelect', selector )
		.off( 'click.dtSelect', selector );

	$('body').off( 'click.dtSelect' + dt.table().node().id );
}

/**
 * Attach mouse listeners to the table to allow mouse selection of items
 *
 * @param {DataTable.Api} dt DataTable to remove events from
 * @private
 */
function enableMouseSelection ( dt )
{
	var container = $( dt.table().container() );
	var ctx = dt.settings()[0];
	var selector = ctx._select.selector;

	container
		.on( 'mousedown.dtSelect', selector, function(e) {
			// Disallow text selection for shift clicking on the table so multi
			// element selection doesn't look terrible!
			if ( e.shiftKey || e.metaKey || e.ctrlKey ) {
				container
					.css( '-moz-user-select', 'none' )
					.one('selectstart.dtSelect', selector, function () {
						return false;
					} );
			}
		} )
		.on( 'mouseup.dtSelect', selector, function() {
			// Allow text selection to occur again, Mozilla style (tested in FF
			// 35.0.1 - still required)
			container.css( '-moz-user-select', '' );
		} )
		.on( 'click.dtSelect', selector, function ( e ) {
			var items = dt.select.items();
			var idx;

			// If text was selected (click and drag), then we shouldn't change
			// the row's selected state
			if ( window.getSelection && $.trim( window.getSelection().toString() ) ) {
				return;
			}

			var ctx = dt.settings()[0];

			// Ignore clicks inside a sub-table
			if ( $(e.target).closest('div.dataTables_wrapper')[0] != dt.table().container() ) {
				return;
			}

			var cell = dt.cell( $(e.target).closest('td, th') );

			// Check the cell actually belongs to the host DataTable (so child
			// rows, etc, are ignored)
			if ( ! cell.any() ) {
				return;
			}

			var event = $.Event('user-select.dt');
			eventTrigger( dt, event, [ items, cell, e ] );

			if ( event.isDefaultPrevented() ) {
				return;
			}

			var cellIndex = cell.index();
			if ( items === 'row' ) {
				idx = cellIndex.row;
				typeSelect( e, dt, ctx, 'row', idx );
			}
			else if ( items === 'column' ) {
				idx = cell.index().column;
				typeSelect( e, dt, ctx, 'column', idx );
			}
			else if ( items === 'cell' ) {
				idx = cell.index();
				typeSelect( e, dt, ctx, 'cell', idx );
			}

			ctx._select_lastCell = cellIndex;
		} );

	// Blurable
	$('body').on( 'click.dtSelect' + dt.table().node().id, function ( e ) {
		if ( ctx._select.blurable ) {
			// If the click was inside the DataTables container, don't blur
			if ( $(e.target).parents().filter( dt.table().container() ).length ) {
				return;
			}

			// Ignore elements which have been removed from the DOM (i.e. paging
			// buttons)
			if ( e.target.getRootNode() !== document ) {
				return;
			}

			// Don't blur in Editor form
			if ( $(e.target).parents('div.DTE').length ) {
				return;
			}

			clear( ctx, true );
		}
	} );
}

/**
 * Trigger an event on a DataTable
 *
 * @param {DataTable.Api} api      DataTable to trigger events on
 * @param  {boolean}      selected true if selected, false if deselected
 * @param  {string}       type     Item type acting on
 * @param  {boolean}      any      Require that there are values before
 *     triggering
 * @private
 */
function eventTrigger ( api, type, args, any )
{
	if ( any && ! api.flatten().length ) {
		return;
	}

	if ( typeof type === 'string' ) {
		type = type +'.dt';
	}

	args.unshift( api );

	$(api.table().node()).trigger( type, args );
}

/**
 * Update the information element of the DataTable showing information about the
 * items selected. This is done by adding tags to the existing text
 * 
 * @param {DataTable.Api} api DataTable to update
 * @private
 */
function info ( api )
{
	var ctx = api.settings()[0];

	if ( ! ctx._select.info || ! ctx.aanFeatures.i ) {
		return;
	}

	var rows    = api.rows( { selected: true } ).flatten().length;
	var columns = api.columns( { selected: true } ).flatten().length;
	var cells   = api.cells( { selected: true } ).flatten().length;

	var add = function ( el, name, num ) {
		el.append( $('<span class="select-item"/>').append( api.i18n(
			'select.'+name+'s',
			{ _: '%d '+name+'s selected', 0: '', 1: '1 '+name+' selected' },
			num
		) ) );
	};

	// Internal knowledge of DataTables to loop over all information elements
	$.each( ctx.aanFeatures.i, function ( i, el ) {
		el = $(el);

		var output  = $('<span class="select-info"/>');
		add( output, 'row', rows );
		add( output, 'column', columns );
		add( output, 'cell', cells  );

		var exisiting = el.children('span.select-info');
		if ( exisiting.length ) {
			exisiting.remove();
		}

		if ( output.text() !== '' ) {
			el.append( output );
		}
	} );
}

/**
 * Initialisation of a new table. Attach event handlers and callbacks to allow
 * Select to operate correctly.
 *
 * This will occur _after_ the initial DataTables initialisation, although
 * before Ajax data is rendered, if there is ajax data
 *
 * @param  {DataTable.settings} ctx Settings object to operate on
 * @private
 */
function init ( ctx ) {
	var api = new DataTable.Api( ctx );

	// Row callback so that classes can be added to rows and cells if the item
	// was selected before the element was created. This will happen with the
	// `deferRender` option enabled.
	// 
	// This method of attaching to `aoRowCreatedCallback` is a hack until
	// DataTables has proper events for row manipulation If you are reviewing
	// this code to create your own plug-ins, please do not do this!
	ctx.aoRowCreatedCallback.push( {
		fn: function ( row, data, index ) {
			var i, ien;
			var d = ctx.aoData[ index ];

			// Row
			if ( d._select_selected ) {
				$( row ).addClass( ctx._select.className );
			}

			// Cells and columns - if separated out, we would need to do two
			// loops, so it makes sense to combine them into a single one
			for ( i=0, ien=ctx.aoColumns.length ; i<ien ; i++ ) {
				if ( ctx.aoColumns[i]._select_selected || (d._selected_cells && d._selected_cells[i]) ) {
					$(d.anCells[i]).addClass( ctx._select.className );
				}
			}
		},
		sName: 'select-deferRender'
	} );

	// On Ajax reload we want to reselect all rows which are currently selected,
	// if there is an rowId (i.e. a unique value to identify each row with)
	api.on( 'preXhr.dt.dtSelect', function () {
		// note that column selection doesn't need to be cached and then
		// reselected, as they are already selected
		var rows = api.rows( { selected: true } ).ids( true ).filter( function ( d ) {
			return d !== undefined;
		} );

		var cells = api.cells( { selected: true } ).eq(0).map( function ( cellIdx ) {
			var id = api.row( cellIdx.row ).id( true );
			return id ?
				{ row: id, column: cellIdx.column } :
				undefined;
		} ).filter( function ( d ) {
			return d !== undefined;
		} );

		// On the next draw, reselect the currently selected items
		api.one( 'draw.dt.dtSelect', function () {
			api.rows( rows ).select();

			// `cells` is not a cell index selector, so it needs a loop
			if ( cells.any() ) {
				cells.each( function ( id ) {
					api.cells( id.row, id.column ).select();
				} );
			}
		} );
	} );

	// Update the table information element with selected item summary
	api.on( 'draw.dtSelect.dt select.dtSelect.dt deselect.dtSelect.dt info.dt', function () {
		info( api );
	} );

	// Clean up and release
	api.on( 'destroy.dtSelect', function () {
		disableMouseSelection( api );
		api.off( '.dtSelect' );
	} );
}

/**
 * Add one or more items (rows or columns) to the selection when shift clicking
 * in OS selection style
 *
 * @param  {DataTable.Api} dt   DataTable
 * @param  {string}        type Row or column range selector
 * @param  {object}        idx  Item index to select to
 * @param  {object}        last Item index to select from
 * @private
 */
function rowColumnRange( dt, type, idx, last )
{
	// Add a range of rows from the last selected row to this one
	var indexes = dt[type+'s']( { search: 'applied' } ).indexes();
	var idx1 = $.inArray( last, indexes );
	var idx2 = $.inArray( idx, indexes );

	if ( ! dt[type+'s']( { selected: true } ).any() && idx1 === -1 ) {
		// select from top to here - slightly odd, but both Windows and Mac OS
		// do this
		indexes.splice( $.inArray( idx, indexes )+1, indexes.length );
	}
	else {
		// reverse so we can shift click 'up' as well as down
		if ( idx1 > idx2 ) {
			var tmp = idx2;
			idx2 = idx1;
			idx1 = tmp;
		}

		indexes.splice( idx2+1, indexes.length );
		indexes.splice( 0, idx1 );
	}

	if ( ! dt[type]( idx, { selected: true } ).any() ) {
		// Select range
		dt[type+'s']( indexes ).select();
	}
	else {
		// Deselect range - need to keep the clicked on row selected
		indexes.splice( $.inArray( idx, indexes ), 1 );
		dt[type+'s']( indexes ).deselect();
	}
}

/**
 * Clear all selected items
 *
 * @param  {DataTable.settings} ctx Settings object of the host DataTable
 * @param  {boolean} [force=false] Force the de-selection to happen, regardless
 *     of selection style
 * @private
 */
function clear( ctx, force )
{
	if ( force || ctx._select.style === 'single' ) {
		var api = new DataTable.Api( ctx );
		
		api.rows( { selected: true } ).deselect();
		api.columns( { selected: true } ).deselect();
		api.cells( { selected: true } ).deselect();
	}
}

/**
 * Select items based on the current configuration for style and items.
 *
 * @param  {object}             e    Mouse event object
 * @param  {DataTables.Api}     dt   DataTable
 * @param  {DataTable.settings} ctx  Settings object of the host DataTable
 * @param  {string}             type Items to select
 * @param  {int|object}         idx  Index of the item to select
 * @private
 */
function typeSelect ( e, dt, ctx, type, idx )
{
	var style = dt.select.style();
	var isSelected = dt[type]( idx, { selected: true } ).any();

	if ( style === 'os' ) {
		if ( e.ctrlKey || e.metaKey ) {
			// Add or remove from the selection
			dt[type]( idx ).select( ! isSelected );
		}
		else if ( e.shiftKey ) {
			if ( type === 'cell' ) {
				cellRange( dt, idx, ctx._select_lastCell || null );
			}
			else {
				rowColumnRange( dt, type, idx, ctx._select_lastCell ?
					ctx._select_lastCell[type] :
					null
				);
			}
		}
		else {
			// No cmd or shift click - deselect if selected, or select
			// this row only
			var selected = dt[type+'s']( { selected: true } );

			if ( isSelected && selected.flatten().length === 1 ) {
				dt[type]( idx ).deselect();
			}
			else {
				selected.deselect();
				dt[type]( idx ).select();
			}
		}
	} else if ( style == 'multi+shift' ) {
		if ( e.shiftKey ) {
			if ( type === 'cell' ) {
				cellRange( dt, idx, ctx._select_lastCell || null );
			}
			else {
				rowColumnRange( dt, type, idx, ctx._select_lastCell ?
					ctx._select_lastCell[type] :
					null
				);
			}
		}
		else {
			dt[ type ]( idx ).select( ! isSelected );
		}
	}
	else {
		dt[ type ]( idx ).select( ! isSelected );
	}
}



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * DataTables selectors
 */

// row and column are basically identical just assigned to different properties
// and checking a different array, so we can dynamically create the functions to
// reduce the code size
$.each( [
	{ type: 'row', prop: 'aoData' },
	{ type: 'column', prop: 'aoColumns' }
], function ( i, o ) {
	DataTable.ext.selector[ o.type ].push( function ( settings, opts, indexes ) {
		var selected = opts.selected;
		var data;
		var out = [];

		if ( selected === undefined ) {
			return indexes;
		}

		for ( var i=0, ien=indexes.length ; i<ien ; i++ ) {
			data = settings[ o.prop ][ indexes[i] ];

			if ( (selected === true && data._select_selected === true) ||
			     (selected === false && ! data._select_selected )
			) {
				out.push( indexes[i] );
			}
		}

		return out;
	} );
} );

DataTable.ext.selector.cell.push( function ( settings, opts, cells ) {
	var selected = opts.selected;
	var rowData;
	var out = [];

	if ( selected === undefined ) {
		return cells;
	}

	for ( var i=0, ien=cells.length ; i<ien ; i++ ) {
		rowData = settings.aoData[ cells[i].row ];

		if ( (selected === true && rowData._selected_cells && rowData._selected_cells[ cells[i].column ] === true) ||
		     (selected === false && ( ! rowData._selected_cells || ! rowData._selected_cells[ cells[i].column ] ) )
		) {
			out.push( cells[i] );
		}
	}

	return out;
} );



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * DataTables API
 *
 * For complete documentation, please refer to the docs/api directory or the
 * DataTables site
 */

// Local variables to improve compression
var apiRegister = DataTable.Api.register;
var apiRegisterPlural = DataTable.Api.registerPlural;

apiRegister( 'select()', function () {
	return this.iterator( 'table', function ( ctx ) {
		DataTable.select.init( new DataTable.Api( ctx ) );
	} );
} );

apiRegister( 'select.blurable()', function ( flag ) {
	if ( flag === undefined ) {
		return this.context[0]._select.blurable;
	}

	return this.iterator( 'table', function ( ctx ) {
		ctx._select.blurable = flag;
	} );
} );

apiRegister( 'select.info()', function ( flag ) {
	if ( info === undefined ) {
		return this.context[0]._select.info;
	}

	return this.iterator( 'table', function ( ctx ) {
		ctx._select.info = flag;
	} );
} );

apiRegister( 'select.items()', function ( items ) {
	if ( items === undefined ) {
		return this.context[0]._select.items;
	}

	return this.iterator( 'table', function ( ctx ) {
		ctx._select.items = items;

		eventTrigger( new DataTable.Api( ctx ), 'selectItems', [ items ] );
	} );
} );

// Takes effect from the _next_ selection. None disables future selection, but
// does not clear the current selection. Use the `deselect` methods for that
apiRegister( 'select.style()', function ( style ) {
	if ( style === undefined ) {
		return this.context[0]._select.style;
	}

	return this.iterator( 'table', function ( ctx ) {
		ctx._select.style = style;

		if ( ! ctx._select_init ) {
			init( ctx );
		}

		// Add / remove mouse event handlers. They aren't required when only
		// API selection is available
		var dt = new DataTable.Api( ctx );
		disableMouseSelection( dt );
		
		if ( style !== 'api' ) {
			enableMouseSelection( dt );
		}

		eventTrigger( new DataTable.Api( ctx ), 'selectStyle', [ style ] );
	} );
} );

apiRegister( 'select.selector()', function ( selector ) {
	if ( selector === undefined ) {
		return this.context[0]._select.selector;
	}

	return this.iterator( 'table', function ( ctx ) {
		disableMouseSelection( new DataTable.Api( ctx ) );

		ctx._select.selector = selector;

		if ( ctx._select.style !== 'api' ) {
			enableMouseSelection( new DataTable.Api( ctx ) );
		}
	} );
} );



apiRegisterPlural( 'rows().select()', 'row().select()', function ( select ) {
	var api = this;

	if ( select === false ) {
		return this.deselect();
	}

	this.iterator( 'row', function ( ctx, idx ) {
		clear( ctx );

		ctx.aoData[ idx ]._select_selected = true;
		$( ctx.aoData[ idx ].nTr ).addClass( ctx._select.className );
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'select', [ 'row', api[i] ], true );
	} );

	return this;
} );

apiRegisterPlural( 'columns().select()', 'column().select()', function ( select ) {
	var api = this;

	if ( select === false ) {
		return this.deselect();
	}

	this.iterator( 'column', function ( ctx, idx ) {
		clear( ctx );

		ctx.aoColumns[ idx ]._select_selected = true;

		var column = new DataTable.Api( ctx ).column( idx );

		$( column.header() ).addClass( ctx._select.className );
		$( column.footer() ).addClass( ctx._select.className );

		column.nodes().to$().addClass( ctx._select.className );
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'select', [ 'column', api[i] ], true );
	} );

	return this;
} );

apiRegisterPlural( 'cells().select()', 'cell().select()', function ( select ) {
	var api = this;

	if ( select === false ) {
		return this.deselect();
	}

	this.iterator( 'cell', function ( ctx, rowIdx, colIdx ) {
		clear( ctx );

		var data = ctx.aoData[ rowIdx ];

		if ( data._selected_cells === undefined ) {
			data._selected_cells = [];
		}

		data._selected_cells[ colIdx ] = true;

		if ( data.anCells ) {
			$( data.anCells[ colIdx ] ).addClass( ctx._select.className );
		}
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'select', [ 'cell', api[i] ], true );
	} );

	return this;
} );


apiRegisterPlural( 'rows().deselect()', 'row().deselect()', function () {
	var api = this;

	this.iterator( 'row', function ( ctx, idx ) {
		ctx.aoData[ idx ]._select_selected = false;
		$( ctx.aoData[ idx ].nTr ).removeClass( ctx._select.className );
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'deselect', [ 'row', api[i] ], true );
	} );

	return this;
} );

apiRegisterPlural( 'columns().deselect()', 'column().deselect()', function () {
	var api = this;

	this.iterator( 'column', function ( ctx, idx ) {
		ctx.aoColumns[ idx ]._select_selected = false;

		var api = new DataTable.Api( ctx );
		var column = api.column( idx );

		$( column.header() ).removeClass( ctx._select.className );
		$( column.footer() ).removeClass( ctx._select.className );

		// Need to loop over each cell, rather than just using
		// `column().nodes()` as cells which are individually selected should
		// not have the `selected` class removed from them
		api.cells( null, idx ).indexes().each( function (cellIdx) {
			var data = ctx.aoData[ cellIdx.row ];
			var cellSelected = data._selected_cells;

			if ( data.anCells && (! cellSelected || ! cellSelected[ cellIdx.column ]) ) {
				$( data.anCells[ cellIdx.column  ] ).removeClass( ctx._select.className );
			}
		} );
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'deselect', [ 'column', api[i] ], true );
	} );

	return this;
} );

apiRegisterPlural( 'cells().deselect()', 'cell().deselect()', function () {
	var api = this;

	this.iterator( 'cell', function ( ctx, rowIdx, colIdx ) {
		var data = ctx.aoData[ rowIdx ];

		data._selected_cells[ colIdx ] = false;

		// Remove class only if the cells exist, and the cell is not column
		// selected, in which case the class should remain (since it is selected
		// in the column)
		if ( data.anCells && ! ctx.aoColumns[ colIdx ]._select_selected ) {
			$( data.anCells[ colIdx ] ).removeClass( ctx._select.className );
		}
	} );

	this.iterator( 'table', function ( ctx, i ) {
		eventTrigger( api, 'deselect', [ 'cell', api[i] ], true );
	} );

	return this;
} );



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Buttons
 */
function i18n( label, def ) {
	return function (dt) {
		return dt.i18n( 'buttons.'+label, def );
	};
}

// Common events with suitable namespaces
function namespacedEvents ( config ) {
	var unique = config._eventNamespace;

	return 'draw.dt.DT'+unique+' select.dt.DT'+unique+' deselect.dt.DT'+unique;
}

var _buttonNamespace = 0;

$.extend( DataTable.ext.buttons, {
	selected: {
		text: i18n( 'selected', 'Selected' ),
		className: 'buttons-selected',
		init: function ( dt, node, config ) {
			var that = this;
			config._eventNamespace = '.select'+(_buttonNamespace++);

			// .DT namespace listeners are removed by DataTables automatically
			// on table destroy
			dt.on( namespacedEvents(config), function () {
				var enable = that.rows( { selected: true } ).any() ||
				             that.columns( { selected: true } ).any() ||
				             that.cells( { selected: true } ).any();

				that.enable( enable );
			} );

			this.disable();
		},
		destroy: function ( dt, node, config ) {
			dt.off( config._eventNamespace );
		}
	},
	selectedSingle: {
		text: i18n( 'selectedSingle', 'Selected single' ),
		className: 'buttons-selected-single',
		init: function ( dt, node, config ) {
			var that = this;
			config._eventNamespace = '.select'+(_buttonNamespace++);

			dt.on( namespacedEvents(config), function () {
				var count = dt.rows( { selected: true } ).flatten().length +
				            dt.columns( { selected: true } ).flatten().length +
				            dt.cells( { selected: true } ).flatten().length;

				that.enable( count === 1 );
			} );

			this.disable();
		},
		destroy: function ( dt, node, config ) {
			dt.off( config._eventNamespace );
		}
	},
	selectAll: {
		text: i18n( 'selectAll', 'Select all' ),
		className: 'buttons-select-all',
		action: function () {
			var items = this.select.items();
			this[ items+'s' ]().select();
		}
	},
	selectNone: {
		text: i18n( 'selectNone', 'Deselect all' ),
		className: 'buttons-select-none',
		action: function () {
			clear( this.settings()[0], true );
		},
		init: function ( dt, node, config ) {
			var that = this;
			config._eventNamespace = '.select'+(_buttonNamespace++);

			dt.on( namespacedEvents(config), function () {
				var count = dt.rows( { selected: true } ).flatten().length +
				            dt.columns( { selected: true } ).flatten().length +
				            dt.cells( { selected: true } ).flatten().length;

				that.enable( count > 0 );
			} );

			this.disable();
		},
		destroy: function ( dt, node, config ) {
			dt.off( config._eventNamespace );
		}
	}
} );

$.each( [ 'Row', 'Column', 'Cell' ], function ( i, item ) {
	var lc = item.toLowerCase();

	DataTable.ext.buttons[ 'select'+item+'s' ] = {
		text: i18n( 'select'+item+'s', 'Select '+lc+'s' ),
		className: 'buttons-select-'+lc+'s',
		action: function () {
			this.select.items( lc );
		},
		init: function ( dt ) {
			var that = this;

			dt.on( 'selectItems.dt.DT', function ( e, ctx, items ) {
				that.active( items === lc );
			} );
		}
	};
} );



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

// DataTables creation - check if select has been defined in the options. Note
// this required that the table be in the document! If it isn't then something
// needs to trigger this method unfortunately. The next major release of
// DataTables will rework the events and address this.
$(document).on( 'preInit.dt.dtSelect', function (e, ctx) {
	if ( e.namespace !== 'dt' ) {
		return;
	}

	DataTable.select.init( new DataTable.Api( ctx ) );
} );


return DataTable.select;
}));