/*!
 * Column visibility buttons for Buttons and DataTables.
 * 2016 SpryMedia Ltd - datatables.net/license
 */

(function( factory ){
	if ( typeof define === 'function' && define.amd ) {
		// AMD
		define( ['jquery', 'datatables.net', 'datatables.net-buttons'], 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, $).$;
			}

			if ( ! $.fn.dataTable.Buttons ) {
				require('datatables.net-buttons')(root, $);
			}

			return factory( $, root, root.document );
		};
	}
	else {
		// Browser
		factory( jQuery, window, document );
	}
}(function( $, window, document, undefined ) {
'use strict';
var DataTable = $.fn.dataTable;


$.extend( DataTable.ext.buttons, {
	// A collection of column visibility buttons
	colvis: function ( dt, conf ) {
		return {
			extend: 'collection',
			text: function ( dt ) {
				return dt.i18n( 'buttons.colvis', 'Column visibility' );
			},
			className: 'buttons-colvis',
			buttons: [ {
				extend: 'columnsToggle',
				columns: conf.columns,
				columnText: conf.columnText
			} ]
		};
	},

	// Selected columns with individual buttons - toggle column visibility
	columnsToggle: function ( dt, conf ) {
		var columns = dt.columns( conf.columns ).indexes().map( function ( idx ) {
			return {
				extend: 'columnToggle',
				columns: idx,
				columnText: conf.columnText
			};
		} ).toArray();

		return columns;
	},

	// Single button to toggle column visibility
	columnToggle: function ( dt, conf ) {
		return {
			extend: 'columnVisibility',
			columns: conf.columns,
			columnText: conf.columnText
		};
	},

	// Selected columns with individual buttons - set column visibility
	columnsVisibility: function ( dt, conf ) {
		var columns = dt.columns( conf.columns ).indexes().map( function ( idx ) {
			return {
				extend: 'columnVisibility',
				columns: idx,
				visibility: conf.visibility,
				columnText: conf.columnText
			};
		} ).toArray();

		return columns;
	},

	// Single button to set column visibility
	columnVisibility: {
		columns: undefined, // column selector
		text: function ( dt, button, conf ) {
			return conf._columnText( dt, conf );
		},
		className: 'buttons-columnVisibility',
		action: function ( e, dt, button, conf ) {
			var col = dt.columns( conf.columns );
			var curr = col.visible();

			col.visible( conf.visibility !== undefined ?
				conf.visibility :
				! (curr.length ? curr[0] : false )
			);
		},
		init: function ( dt, button, conf ) {
			var that = this;
			button.attr( 'data-cv-idx', conf.columns );

			dt
				.on( 'column-visibility.dt'+conf.namespace, function (e, settings) {
					if ( ! settings.bDestroying && settings.nTable == dt.settings()[0].nTable ) {
						that.active( dt.column( conf.columns ).visible() );
					}
				} )
				.on( 'column-reorder.dt'+conf.namespace, function (e, settings, details) {
					if ( dt.columns( conf.columns ).count() !== 1 ) {
						return;
					}

					// This button controls the same column index but the text for the column has
					// changed
					button.text( conf._columnText( dt, conf ) );

					// Since its a different column, we need to check its visibility
					that.active( dt.column( conf.columns ).visible() );
				} );

			this.active( dt.column( conf.columns ).visible() );
		},
		destroy: function ( dt, button, conf ) {
			dt
				.off( 'column-visibility.dt'+conf.namespace )
				.off( 'column-reorder.dt'+conf.namespace );
		},

		_columnText: function ( dt, conf ) {
			// Use DataTables' internal data structure until this is presented
			// is a public API. The other option is to use
			// `$( column(col).node() ).text()` but the node might not have been
			// populated when Buttons is constructed.
			var idx = dt.column( conf.columns ).index();
			var title = dt.settings()[0].aoColumns[ idx ].sTitle
				.replace(/\n/g," ")        // remove new lines
				.replace(/<br\s*\/?>/gi, " ")  // replace line breaks with spaces
				.replace(/<select(.*?)<\/select>/g, "") // remove select tags, including options text
				.replace(/<!\-\-.*?\-\->/g, "") // strip HTML comments
				.replace(/<.*?>/g, "")   // strip HTML
				.replace(/^\s+|\s+$/g,""); // trim

			return conf.columnText ?
				conf.columnText( dt, idx, title ) :
				title;
		}
	},


	colvisRestore: {
		className: 'buttons-colvisRestore',

		text: function ( dt ) {
			return dt.i18n( 'buttons.colvisRestore', 'Restore visibility' );
		},

		init: function ( dt, button, conf ) {
			conf._visOriginal = dt.columns().indexes().map( function ( idx ) {
				return dt.column( idx ).visible();
			} ).toArray();
		},

		action: function ( e, dt, button, conf ) {
			dt.columns().every( function ( i ) {
				// Take into account that ColReorder might have disrupted our
				// indexes
				var idx = dt.colReorder && dt.colReorder.transpose ?
					dt.colReorder.transpose( i, 'toOriginal' ) :
					i;

				this.visible( conf._visOriginal[ idx ] );
			} );
		}
	},


	colvisGroup: {
		className: 'buttons-colvisGroup',

		action: function ( e, dt, button, conf ) {
			dt.columns( conf.show ).visible( true, false );
			dt.columns( conf.hide ).visible( false, false );

			dt.columns.adjust();
		},

		show: [],

		hide: []
	}
} );


return DataTable.Buttons;
}));
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