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✏️ Editing: dataTables.buttons.js

/*! Buttons for DataTables 2.2.2
 * ©2016-2022 SpryMedia Ltd - datatables.net/license
 */

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;

// Used for namespacing events added to the document by each instance, so they
// can be removed on destroy
var _instCounter = 0;

// Button namespacing counter for namespacing events on individual buttons
var _buttonCounter = 0;

var _dtButtons = DataTable.ext.buttons;

// Allow for jQuery slim
function _fadeIn(el, duration, fn) {
	if ($.fn.animate) {
		el
			.stop()
			.fadeIn( duration, fn );

}
	else {
		el.css('display', 'block');

if (fn) {
			fn.call(el);
		}
	}
}

function _fadeOut(el, duration, fn) {
	if ($.fn.animate) {
		el
			.stop()
			.fadeOut( duration, fn );
	}
	else {
		el.css('display', 'none');
		
		if (fn) {
			fn.call(el);
		}
	}
}

/**
 * [Buttons description]
 * @param {[type]}
 * @param {[type]}
 */
var Buttons = function( dt, config )
{
	// If not created with a `new` keyword then we return a wrapper function that
	// will take the settings object for a DT. This allows easy use of new instances
	// with the `layout` option - e.g. `topLeft: $.fn.dataTable.Buttons( ... )`.
	if ( !(this instanceof Buttons) ) {
		return function (settings) {
			return new Buttons( settings, dt ).container();
		};
	}

// If there is no config set it to an empty object
	if ( typeof( config ) === 'undefined' ) {
		config = {};	
	}
	
	// Allow a boolean true for defaults
	if ( config === true ) {
		config = {};
	}

// For easy configuration of buttons an array can be given
	if ( Array.isArray( config ) ) {
		config = { buttons: config };
	}

this.c = $.extend( true, {}, Buttons.defaults, config );

// Don't want a deep copy for the buttons
	if ( config.buttons ) {
		this.c.buttons = config.buttons;
	}

this.s = {
		dt: new DataTable.Api( dt ),
		buttons: [],
		listenKeys: '',
		namespace: 'dtb'+(_instCounter++)
	};

this.dom = {
		container: $('<'+this.c.dom.container.tag+'/>')
			.addClass( this.c.dom.container.className )
	};

this._constructor();
};

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

/**
	 * Get the action of a button
	 * @param  {int|string} Button index
	 * @return {function}
	 *//**
	 * Set the action of a button
	 * @param  {node} node Button element
	 * @param  {function} action Function to set
	 * @return {Buttons} Self for chaining
	 */
	action: function ( node, action )
	{
		var button = this._nodeToButton( node );

if ( action === undefined ) {
			return button.conf.action;
		}

button.conf.action = action;

return this;
	},

/**
	 * Add an active class to the button to make to look active or get current
	 * active state.
	 * @param  {node} node Button element
	 * @param  {boolean} [flag] Enable / disable flag
	 * @return {Buttons} Self for chaining or boolean for getter
	 */
	active: function ( node, flag ) {
		var button = this._nodeToButton( node );
		var klass = this.c.dom.button.active;
		var jqNode = $(button.node);

if ( flag === undefined ) {
			return jqNode.hasClass( klass );
		}

jqNode.toggleClass( klass, flag === undefined ? true : flag );

return this;
	},

/**
	 * Add a new button
	 * @param {object} config Button configuration object, base string name or function
	 * @param {int|string} [idx] Button index for where to insert the button
	 * @param {boolean} [draw=true] Trigger a draw. Set a false when adding
	 *   lots of buttons, until the last button.
	 * @return {Buttons} Self for chaining
	 */
	add: function ( config, idx, draw )
	{
		var buttons = this.s.buttons;

if ( typeof idx === 'string' ) {
			var split = idx.split('-');
			var base = this.s;

for ( var i=0, ien=split.length-1 ; i<ien ; i++ ) {
				base = base.buttons[ split[i]*1 ];
			}

buttons = base.buttons;
			idx = split[ split.length-1 ]*1;
		}

this._expandButton(
			buttons,
			config,
			config !== undefined ? config.split : undefined,
			(config === undefined || config.split === undefined || config.split.length === 0) && base !== undefined,
			false,
			idx
		);

if (draw === undefined || draw === true) {
			this._draw();
		}
	
		return this;
	},

/**
	 * Clear buttons from a collection and then insert new buttons
	 */
	collectionRebuild: function ( node, newButtons )
	{
		var button = this._nodeToButton( node );
		
		if(newButtons !== undefined) {
			var i;
			// Need to reverse the array
			for (i=button.buttons.length-1; i>=0; i--) {
				this.remove(button.buttons[i].node);
			}
	
			for (i=0; i<newButtons.length; i++) {
				var newBtn = newButtons[i];

this._expandButton(
					button.buttons,
					newBtn,
					newBtn !== undefined && newBtn.config !== undefined && newBtn.config.split !== undefined,
					true,
					newBtn.parentConf !== undefined && newBtn.parentConf.split !== undefined,
					i,
					newBtn.parentConf
				);
			}
		}

this._draw(button.collection, button.buttons);
	},

/**
	 * Get the container node for the buttons
	 * @return {jQuery} Buttons node
	 */
	container: function ()
	{
		return this.dom.container;
	},

/**
	 * Disable a button
	 * @param  {node} node Button node
	 * @return {Buttons} Self for chaining
	 */
	disable: function ( node ) {
		var button = this._nodeToButton( node );

$(button.node)
			.addClass( this.c.dom.button.disabled )
			.attr('disabled', true);

return this;
	},

/**
	 * Destroy the instance, cleaning up event handlers and removing DOM
	 * elements
	 * @return {Buttons} Self for chaining
	 */
	destroy: function ()
	{
		// Key event listener
		$('body').off( 'keyup.'+this.s.namespace );

// Individual button destroy (so they can remove their own events if
		// needed). Take a copy as the array is modified by `remove`
		var buttons = this.s.buttons.slice();
		var i, ien;
		
		for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
			this.remove( buttons[i].node );
		}

// Container
		this.dom.container.remove();

// Remove from the settings object collection
		var buttonInsts = this.s.dt.settings()[0];

for ( i=0, ien=buttonInsts.length ; i<ien ; i++ ) {
			if ( buttonInsts.inst === this ) {
				buttonInsts.splice( i, 1 );
				break;
			}
		}

return this;
	},

/**
	 * Enable / disable a button
	 * @param  {node} node Button node
	 * @param  {boolean} [flag=true] Enable / disable flag
	 * @return {Buttons} Self for chaining
	 */
	enable: function ( node, flag )
	{
		if ( flag === false ) {
			return this.disable( node );
		}

var button = this._nodeToButton( node );
		$(button.node)
			.removeClass( this.c.dom.button.disabled )
			.removeAttr('disabled');

return this;
	},

/**
	 * Get a button's index
	 * 
	 * This is internally recursive
	 * @param {element} node Button to get the index of
	 * @return {string} Button index
	 */
	index: function ( node, nested, buttons )
	{
		if ( ! nested ) {
			nested = '';
			buttons = this.s.buttons;
		}

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			var inner = buttons[i].buttons;

if (buttons[i].node === node) {
				return nested + i;
			}

if ( inner && inner.length ) {
				var match = this.index(node, i + '-', inner);

if (match !== null) {
					return match;
				}
			}
		}

return null;
	},

/**
	 * Get the instance name for the button set selector
	 * @return {string} Instance name
	 */
	name: function ()
	{
		return this.c.name;
	},

/**
	 * Get a button's node of the buttons container if no button is given
	 * @param  {node} [node] Button node
	 * @return {jQuery} Button element, or container
	 */
	node: function ( node )
	{
		if ( ! node ) {
			return this.dom.container;
		}

var button = this._nodeToButton( node );
		return $(button.node);
	},

/**
	 * Set / get a processing class on the selected button
	 * @param {element} node Triggering button node
	 * @param  {boolean} flag true to add, false to remove, undefined to get
	 * @return {boolean|Buttons} Getter value or this if a setter.
	 */
	processing: function ( node, flag )
	{
		var dt = this.s.dt;
		var button = this._nodeToButton( node );

if ( flag === undefined ) {
			return $(button.node).hasClass( 'processing' );
		}

$(button.node).toggleClass( 'processing', flag );

$(dt.table().node()).triggerHandler( 'buttons-processing.dt', [
			flag, dt.button( node ), dt, $(node), button.conf
		] );

return this;
	},

/**
	 * Remove a button.
	 * @param  {node} node Button node
	 * @return {Buttons} Self for chaining
	 */
	remove: function ( node )
	{
		var button = this._nodeToButton( node );
		var host = this._nodeToHost( node );
		var dt = this.s.dt;

// Remove any child buttons first
		if ( button.buttons.length ) {
			for ( var i=button.buttons.length-1 ; i>=0 ; i-- ) {
				this.remove( button.buttons[i].node );
			}
		}

button.conf.destroying = true;

// Allow the button to remove event handlers, etc
		if ( button.conf.destroy ) {
			button.conf.destroy.call( dt.button(node), dt, $(node), button.conf );
		}

this._removeKey( button.conf );

$(button.node).remove();

var idx = $.inArray( button, host );
		host.splice( idx, 1 );

return this;
	},

/**
	 * Get the text for a button
	 * @param  {int|string} node Button index
	 * @return {string} Button text
	 *//**
	 * Set the text for a button
	 * @param  {int|string|function} node Button index
	 * @param  {string} label Text
	 * @return {Buttons} Self for chaining
	 */
	text: function ( node, label )
	{
		var button = this._nodeToButton( node );
		var buttonLiner = this.c.dom.collection.buttonLiner;
		var linerTag = button.inCollection && buttonLiner && buttonLiner.tag ?
			buttonLiner.tag :
			this.c.dom.buttonLiner.tag;
		var dt = this.s.dt;
		var jqNode = $(button.node);
		var text = function ( opt ) {
			return typeof opt === 'function' ?
				opt( dt, jqNode, button.conf ) :
				opt;
		};

if ( label === undefined ) {
			return text( button.conf.text );
		}

button.conf.text = label;

if ( linerTag ) {
			jqNode
				.children( linerTag )
				.eq(0)
				.filter(':not(.dt-down-arrow)')
				.html( text(label) );
		}
		else {
			jqNode.html( text(label) );
		}

return this;
	},

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Constructor
	 */

/**
	 * Buttons constructor
	 * @private
	 */
	_constructor: function ()
	{
		var that = this;
		var dt = this.s.dt;
		var dtSettings = dt.settings()[0];
		var buttons =  this.c.buttons;

if ( ! dtSettings._buttons ) {
			dtSettings._buttons = [];
		}

dtSettings._buttons.push( {
			inst: this,
			name: this.c.name
		} );

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			this.add( buttons[i] );
		}

dt.on( 'destroy', function ( e, settings ) {
			if ( settings === dtSettings ) {
				that.destroy();
			}
		} );

// Global key event binding to listen for button keys
		$('body').on( 'keyup.'+this.s.namespace, function ( e ) {
			if ( ! document.activeElement || document.activeElement === document.body ) {
				// SUse a string of characters for fast lookup of if we need to
				// handle this
				var character = String.fromCharCode(e.keyCode).toLowerCase();

if ( that.s.listenKeys.toLowerCase().indexOf( character ) !== -1 ) {
					that._keypress( character, e );
				}
			}
		} );
	},

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Private methods
	 */

/**
	 * Add a new button to the key press listener
	 * @param {object} conf Resolved button configuration object
	 * @private
	 */
	_addKey: function ( conf )
	{
		if ( conf.key ) {
			this.s.listenKeys += $.isPlainObject( conf.key ) ?
				conf.key.key :
				conf.key;
		}
	},

/**
	 * Insert the buttons into the container. Call without parameters!
	 * @param  {node} [container] Recursive only - Insert point
	 * @param  {array} [buttons] Recursive only - Buttons array
	 * @private
	 */
	_draw: function ( container, buttons )
	{
		if ( ! container ) {
			container = this.dom.container;
			buttons = this.s.buttons;
		}

container.children().detach();

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			container.append( buttons[i].inserter );
			container.append( ' ' );

if ( buttons[i].buttons && buttons[i].buttons.length ) {
				this._draw( buttons[i].collection, buttons[i].buttons );
			}
		}
	},

/**
	 * Create buttons from an array of buttons
	 * @param  {array} attachTo Buttons array to attach to
	 * @param  {object} button Button definition
	 * @param  {boolean} inCollection true if the button is in a collection
	 * @private
	 */
	_expandButton: function ( attachTo, button, split, inCollection, inSplit, attachPoint, parentConf )
	{
		var dt = this.s.dt;
		var buttonCounter = 0;
		var isSplit = false;
		var buttons = ! Array.isArray( button ) ?
			[ button ] :
			button;
		
		if(button === undefined ) {
			buttons = !Array.isArray(split) ?
				[ split ] :
				split;
		}

if (button !== undefined && button.split !== undefined) {
			isSplit = true;
		}
			
		for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			var conf = this._resolveExtends( buttons[i] );

if ( ! conf ) {
				continue;
			}

if( conf.config !== undefined && conf.config.split) {
				isSplit = true;
			}
			else {
				isSplit = false;
			}
			
			// If the configuration is an array, then expand the buttons at this
			// point
			if ( Array.isArray( conf ) ) {
				this._expandButton( attachTo, conf, built !== undefined && built.conf !== undefined ? built.conf.split : undefined, inCollection, parentConf !== undefined && parentConf.split !== undefined, attachPoint, parentConf );
				continue;
			}

var built = this._buildButton( conf, inCollection, conf.split !== undefined || (conf.config !== undefined && conf.config.split !== undefined), inSplit );
			if ( ! built ) {
				continue;
			}

if ( attachPoint !== undefined && attachPoint !== null ) {
				attachTo.splice( attachPoint, 0, built );
				attachPoint++;
			}
			else {
				attachTo.push( built );
			}

if ( built.conf.buttons || built.conf.split ) {
				built.collection = $('<'+(isSplit ? this.c.dom.splitCollection.tag : this.c.dom.collection.tag)+'/>');

built.conf._collection = built.collection;

if(built.conf.split) {
					for(var j = 0; j < built.conf.split.length; j++) {
						if(typeof built.conf.split[j] === "object") {
							built.conf.split[j].parent = parentConf;
							if(built.conf.split[j].collectionLayout === undefined) {
								built.conf.split[j].collectionLayout = built.conf.collectionLayout;
							}
							if(built.conf.split[j].dropup === undefined) {
								built.conf.split[j].dropup = built.conf.dropup;
							}
							if(built.conf.split[j].fade === undefined) {
								built.conf.split[j].fade = built.conf.fade;
							}
						}
					}
				}
				else {
					$(built.node).append($('<span class="dt-down-arrow">'+this.c.dom.splitDropdown.text+'</span>'))
				}

this._expandButton( built.buttons, built.conf.buttons, built.conf.split, !isSplit, isSplit, attachPoint, built.conf );
			}
			built.conf.parent = parentConf;

// init call is made here, rather than buildButton as it needs to
			// be selectable, and for that it needs to be in the buttons array
			if ( conf.init ) {
				conf.init.call( dt.button( built.node ), dt, $(built.node), conf );
			}

buttonCounter++;
		}
	},

/**
	 * Create an individual button
	 * @param  {object} config            Resolved button configuration
	 * @param  {boolean} inCollection `true` if a collection button
	 * @return {jQuery} Created button node (jQuery)
	 * @private
	 */
	_buildButton: function ( config, inCollection, isSplit, inSplit )
	{
		var buttonDom = this.c.dom.button;
		var linerDom = this.c.dom.buttonLiner;
		var collectionDom = this.c.dom.collection;
		var splitDom = this.c.dom.split;
		var splitCollectionDom = this.c.dom.splitCollection;
		var splitDropdownButton = this.c.dom.splitDropdownButton;
		var dt = this.s.dt;
		var text = function ( opt ) {
			return typeof opt === 'function' ?
				opt( dt, button, config ) :
				opt;
		};

// Spacers don't do much other than insert an element into the DOM
		if (config.spacer) {
			var spacer = $('<span></span>')
				.addClass('dt-button-spacer ' + config.style + ' ' + buttonDom.spacerClass)
				.html(text(config.text));

return {
				conf:         config,
				node:         spacer,
				inserter:     spacer,
				buttons:      [],
				inCollection: inCollection,
				isSplit:	  isSplit,
				inSplit:	  inSplit,
				collection:   null
			};
		}

if ( !isSplit && inSplit && splitCollectionDom ) {
			buttonDom = splitDropdownButton;
		}
		else if ( !isSplit && inCollection && collectionDom.button ) {
			buttonDom = collectionDom.button;
		}

if ( !isSplit && inSplit && splitCollectionDom.buttonLiner ) {
			linerDom = splitCollectionDom.buttonLiner
		}
		else if ( !isSplit && inCollection && collectionDom.buttonLiner ) {
			linerDom = collectionDom.buttonLiner;
		}

// Make sure that the button is available based on whatever requirements
		// it has. For example, PDF button require pdfmake
		if ( config.available && ! config.available( dt, config ) && !config.hasOwnProperty('html') ) {
			return false;
		}

var button;
		if(!config.hasOwnProperty('html')) {
			var action = function ( e, dt, button, config ) {
				config.action.call( dt.button( button ), e, dt, button, config );
	
				$(dt.table().node()).triggerHandler( 'buttons-action.dt', [
					dt.button( button ), dt, button, config 
				] );
			};

var tag = config.tag || buttonDom.tag;
			var clickBlurs = config.clickBlurs === undefined
				? true :
				config.clickBlurs;

button = $('<'+tag+'/>')
				.addClass( buttonDom.className )
				.addClass( inSplit ? this.c.dom.splitDropdownButton.className : '')
				.attr( 'tabindex', this.s.dt.settings()[0].iTabIndex )
				.attr( 'aria-controls', this.s.dt.table().node().id )
				.on( 'click.dtb', function (e) {
					e.preventDefault();
	
					if ( ! button.hasClass( buttonDom.disabled ) && config.action ) {
						action( e, dt, button, config );
					}
					if( clickBlurs ) {
						button.trigger('blur');
					}
				} )
				.on( 'keypress.dtb', function (e) {
					if ( e.keyCode === 13 ) {
						e.preventDefault();

if ( ! button.hasClass( buttonDom.disabled ) && config.action ) {
							action( e, dt, button, config );
						}
					}
				} );
	
			// Make `a` tags act like a link
			if ( tag.toLowerCase() === 'a' ) {
				button.attr( 'href', '#' );
			}
	
			// Button tags should have `type=button` so they don't have any default behaviour
			if ( tag.toLowerCase() === 'button' ) {
				button.attr( 'type', 'button' );
			}
	
			if ( linerDom.tag ) {
				var liner = $('<'+linerDom.tag+'/>')
					.html( text( config.text ) )
					.addClass( linerDom.className );
	
				if ( linerDom.tag.toLowerCase() === 'a' ) {
					liner.attr( 'href', '#' );
				}
	
				button.append( liner );
			}
			else {
				button.html( text( config.text ) );
			}
	
			if ( config.enabled === false ) {
				button.addClass( buttonDom.disabled );
			}
	
			if ( config.className ) {
				button.addClass( config.className );
			}
	
			if ( config.titleAttr ) {
				button.attr( 'title', text( config.titleAttr ) );
			}
	
			if ( config.attr ) {
				button.attr( config.attr );
			}
	
			if ( ! config.namespace ) {
				config.namespace = '.dt-button-'+(_buttonCounter++);
			}

if  ( config.config !== undefined && config.config.split ) {
				config.split = config.config.split;
			}
		}
		else {
			button = $(config.html)
		}
	
		var buttonContainer = this.c.dom.buttonContainer;
		var inserter;
		if ( buttonContainer && buttonContainer.tag ) {
			inserter = $('<'+buttonContainer.tag+'/>')
				.addClass( buttonContainer.className )
				.append( button );
		}
		else {
			inserter = button;
		}

this._addKey( config );

// Style integration callback for DOM manipulation
		// Note that this is _not_ documented. It is currently
		// for style integration only
		if( this.c.buttonCreated ) {
			inserter = this.c.buttonCreated( config, inserter );
		}

var splitDiv;
		if(isSplit) {
			splitDiv = $('<div/>').addClass(this.c.dom.splitWrapper.className)
			splitDiv.append(button);
			var dropButtonConfig = $.extend(config, {
				text: this.c.dom.splitDropdown.text,
				className: this.c.dom.splitDropdown.className,
				closeButton: false,
				attr: {
					'aria-haspopup': true,
					'aria-expanded': false
				},
				align: this.c.dom.splitDropdown.align,
				splitAlignClass: this.c.dom.splitDropdown.splitAlignClass
				
			})

this._addKey(dropButtonConfig);

var splitAction = function ( e, dt, button, config ) {
				_dtButtons.split.action.call( dt.button($('div.dt-btn-split-wrapper')[0] ), e, dt, button, config );
	
				$(dt.table().node()).triggerHandler( 'buttons-action.dt', [
					dt.button( button ), dt, button, config 
				] );
				button.attr('aria-expanded', true)
			};
			
			var dropButton = $('<button class="' + this.c.dom.splitDropdown.className + ' dt-button"><span class="dt-btn-split-drop-arrow">'+this.c.dom.splitDropdown.text+'</span></button>')
				.on( 'click.dtb', function (e) {
					e.preventDefault();
					e.stopPropagation();

if ( ! dropButton.hasClass( buttonDom.disabled )) {
						splitAction( e, dt, dropButton, dropButtonConfig );
					}
					if ( clickBlurs ) {
						dropButton.trigger('blur');
					}
				} )
				.on( 'keypress.dtb', function (e) {
					if ( e.keyCode === 13 ) {
						e.preventDefault();

if ( ! dropButton.hasClass( buttonDom.disabled ) ) {
							splitAction( e, dt, dropButton, dropButtonConfig );
						}
					}
				} );

if(config.split.length === 0) {
				dropButton.addClass('dtb-hide-drop');
			}

splitDiv.append(dropButton).attr(dropButtonConfig.attr);
		}

return {
			conf:         config,
			node:         isSplit ? splitDiv.get(0) : button.get(0),
			inserter:     isSplit ? splitDiv : inserter,
			buttons:      [],
			inCollection: inCollection,
			isSplit:	  isSplit,
			inSplit:	  inSplit,
			collection:   null
		};
	},

/**
	 * Get the button object from a node (recursive)
	 * @param  {node} node Button node
	 * @param  {array} [buttons] Button array, uses base if not defined
	 * @return {object} Button object
	 * @private
	 */
	_nodeToButton: function ( node, buttons )
	{
		if ( ! buttons ) {
			buttons = this.s.buttons;
		}

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			if ( buttons[i].node === node ) {
				return buttons[i];
			}

if ( buttons[i].buttons.length ) {
				var ret = this._nodeToButton( node, buttons[i].buttons );

if ( ret ) {
					return ret;
				}
			}
		}
	},

/**
	 * Get container array for a button from a button node (recursive)
	 * @param  {node} node Button node
	 * @param  {array} [buttons] Button array, uses base if not defined
	 * @return {array} Button's host array
	 * @private
	 */
	_nodeToHost: function ( node, buttons )
	{
		if ( ! buttons ) {
			buttons = this.s.buttons;
		}

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			if ( buttons[i].node === node ) {
				return buttons;
			}

if ( buttons[i].buttons.length ) {
				var ret = this._nodeToHost( node, buttons[i].buttons );

if ( ret ) {
					return ret;
				}
			}
		}
	},

/**
	 * Handle a key press - determine if any button's key configured matches
	 * what was typed and trigger the action if so.
	 * @param  {string} character The character pressed
	 * @param  {object} e Key event that triggered this call
	 * @private
	 */
	_keypress: function ( character, e )
	{
		// Check if this button press already activated on another instance of Buttons
		if ( e._buttonsHandled ) {
			return;
		}

var run = function ( conf, node ) {
			if ( ! conf.key ) {
				return;
			}

if ( conf.key === character ) {
				e._buttonsHandled = true;
				$(node).click();
			}
			else if ( $.isPlainObject( conf.key ) ) {
				if ( conf.key.key !== character ) {
					return;
				}

if ( conf.key.shiftKey && ! e.shiftKey ) {
					return;
				}

if ( conf.key.altKey && ! e.altKey ) {
					return;
				}

if ( conf.key.ctrlKey && ! e.ctrlKey ) {
					return;
				}

if ( conf.key.metaKey && ! e.metaKey ) {
					return;
				}

// Made it this far - it is good
				e._buttonsHandled = true;
				$(node).click();
			}
		};

var recurse = function ( a ) {
			for ( var i=0, ien=a.length ; i<ien ; i++ ) {
				run( a[i].conf, a[i].node );

if ( a[i].buttons.length ) {
					recurse( a[i].buttons );
				}
			}
		};

recurse( this.s.buttons );
	},

/**
	 * Remove a key from the key listener for this instance (to be used when a
	 * button is removed)
	 * @param  {object} conf Button configuration
	 * @private
	 */
	_removeKey: function ( conf )
	{
		if ( conf.key ) {
			var character = $.isPlainObject( conf.key ) ?
				conf.key.key :
				conf.key;

// Remove only one character, as multiple buttons could have the
			// same listening key
			var a = this.s.listenKeys.split('');
			var idx = $.inArray( character, a );
			a.splice( idx, 1 );
			this.s.listenKeys = a.join('');
		}
	},

/**
	 * Resolve a button configuration
	 * @param  {string|function|object} conf Button config to resolve
	 * @return {object} Button configuration
	 * @private
	 */
	_resolveExtends: function ( conf )
	{
		var that = this;
		var dt = this.s.dt;
		var i, ien;
		var toConfObject = function ( base ) {
			var loop = 0;

// Loop until we have resolved to a button configuration, or an
			// array of button configurations (which will be iterated
			// separately)
			while ( ! $.isPlainObject(base) && ! Array.isArray(base) ) {
				if ( base === undefined ) {
					return;
				}

if ( typeof base === 'function' ) {
					base = base.call( that, dt, conf );

if ( ! base ) {
						return false;
					}
				}
				else if ( typeof base === 'string' ) {
					if ( ! _dtButtons[ base ] ) {
						return {html: base}
					}

base = _dtButtons[ base ];
				}

loop++;
				if ( loop > 30 ) {
					// Protect against misconfiguration killing the browser
					throw 'Buttons: Too many iterations';
				}
			}

return Array.isArray( base ) ?
				base :
				$.extend( {}, base );
		};

conf = toConfObject( conf );

while ( conf && conf.extend ) {
			// Use `toConfObject` in case the button definition being extended
			// is itself a string or a function
			if ( ! _dtButtons[ conf.extend ] ) {
				throw 'Cannot extend unknown button type: '+conf.extend;
			}

var objArray = toConfObject( _dtButtons[ conf.extend ] );
			if ( Array.isArray( objArray ) ) {
				return objArray;
			}
			else if ( ! objArray ) {
				// This is a little brutal as it might be possible to have a
				// valid button without the extend, but if there is no extend
				// then the host button would be acting in an undefined state
				return false;
			}

// Stash the current class name
			var originalClassName = objArray.className;

if (conf.config !== undefined && objArray.config !== undefined) {
				conf.config = $.extend({}, objArray.config, conf.config)
			}

conf = $.extend( {}, objArray, conf );

// The extend will have overwritten the original class name if the
			// `conf` object also assigned a class, but we want to concatenate
			// them so they are list that is combined from all extended buttons
			if ( originalClassName && conf.className !== originalClassName ) {
				conf.className = originalClassName+' '+conf.className;
			}

// Buttons to be added to a collection  -gives the ability to define
			// if buttons should be added to the start or end of a collection
			var postfixButtons = conf.postfixButtons;
			if ( postfixButtons ) {
				if ( ! conf.buttons ) {
					conf.buttons = [];
				}

for ( i=0, ien=postfixButtons.length ; i<ien ; i++ ) {
					conf.buttons.push( postfixButtons[i] );
				}

conf.postfixButtons = null;
			}

var prefixButtons = conf.prefixButtons;
			if ( prefixButtons ) {
				if ( ! conf.buttons ) {
					conf.buttons = [];
				}

for ( i=0, ien=prefixButtons.length ; i<ien ; i++ ) {
					conf.buttons.splice( i, 0, prefixButtons[i] );
				}

conf.prefixButtons = null;
			}

// Although we want the `conf` object to overwrite almost all of
			// the properties of the object being extended, the `extend`
			// property should come from the object being extended
			conf.extend = objArray.extend;
		}

return conf;
	},

/**
	 * Display (and replace if there is an existing one) a popover attached to a button
	 * @param {string|node} content Content to show
	 * @param {DataTable.Api} hostButton DT API instance of the button
	 * @param {object} inOpts Options (see object below for all options)
	 */
	_popover: function ( content, hostButton, inOpts, e ) {
		var dt = hostButton;
		var buttonsSettings = this.c;
		var closed = false;
		var options = $.extend( {
			align: 'button-left', // button-right, dt-container, split-left, split-right
			autoClose: false,
			background: true,
			backgroundClassName: 'dt-button-background',
			closeButton: true,
			contentClassName: buttonsSettings.dom.collection.className,
			collectionLayout: '',
			collectionTitle: '',
			dropup: false,
			fade: 400,
			popoverTitle: '',
			rightAlignClassName: 'dt-button-right',
			tag: buttonsSettings.dom.collection.tag
		}, inOpts );

var hostNode = hostButton.node();

var close = function () {
			closed = true;

_fadeOut(
				$('.dt-button-collection'),
				options.fade,
				function () {
					$(this).detach();
				}
			);

$(dt.buttons( '[aria-haspopup="true"][aria-expanded="true"]' ).nodes())
				.attr('aria-expanded', 'false');

$('div.dt-button-background').off( 'click.dtb-collection' );
			Buttons.background( false, options.backgroundClassName, options.fade, hostNode );

$(window).off('resize.resize.dtb-collection');
			$('body').off( '.dtb-collection' );
			dt.off( 'buttons-action.b-internal' );
			dt.off( 'destroy' );
		};

if (content === false) {
			close();
			return;
		}

var existingExpanded = $(dt.buttons( '[aria-haspopup="true"][aria-expanded="true"]' ).nodes());
		if ( existingExpanded.length ) {
			// Reuse the current position if the button that was triggered is inside an existing collection
			if (hostNode.closest('div.dt-button-collection').length) {
				hostNode = existingExpanded.eq(0);
			}

close();
		}

// Try to be smart about the layout
		var cnt = $('.dt-button', content).length;
		var mod = '';

if (cnt === 3) {
			mod = 'dtb-b3';
		}
		else if (cnt === 2) {
			mod = 'dtb-b2';
		}
		else if (cnt === 1) {
			mod = 'dtb-b1';
		}

var display = $('<div/>')
			.addClass('dt-button-collection')
			.addClass(options.collectionLayout)
			.addClass(options.splitAlignClass)
			.addClass(mod)
			.css('display', 'none');

content = $(content)
			.addClass(options.contentClassName)
			.attr('role', 'menu')
			.appendTo(display);

hostNode.attr( 'aria-expanded', 'true' );

if ( hostNode.parents('body')[0] !== document.body ) {
			hostNode = document.body.lastChild;
		}

if ( options.popoverTitle ) {
			display.prepend('<div class="dt-button-collection-title">'+options.popoverTitle+'</div>');
		}
		else if ( options.collectionTitle ) {
			display.prepend('<div class="dt-button-collection-title">'+options.collectionTitle+'</div>');
		}

if (options.closeButton) {
			display.prepend('<div class="dtb-popover-close">x</div>').addClass('dtb-collection-closeable')
		}

_fadeIn( display.insertAfter( hostNode ), options.fade );

var tableContainer = $( hostButton.table().container() );
		var position = display.css( 'position' );

if ( options.span === 'container' || options.align === 'dt-container' ) {
			hostNode = hostNode.parent();
			display.css('width', tableContainer.width());
		}

// Align the popover relative to the DataTables container
		// Useful for wide popovers such as SearchPanes
		if (position === 'absolute') {
			// Align relative to the host button
			var offsetParent = $(hostNode[0].offsetParent);
			var buttonPosition = hostNode.position();
			var buttonOffset = hostNode.offset();
			var tableSizes = offsetParent.offset();
			var containerPosition = offsetParent.position();
			var computed = window.getComputedStyle(offsetParent[0]);

tableSizes.height = offsetParent.outerHeight();
			tableSizes.width = offsetParent.width() + parseFloat(computed.paddingLeft);
			tableSizes.right = tableSizes.left + tableSizes.width;
			tableSizes.bottom = tableSizes.top + tableSizes.height;

// Set the initial position so we can read height / width
			var top = buttonPosition.top + hostNode.outerHeight();
			var left = buttonPosition.left;

display.css( {
				top: top,
				left: left
			} );

// Get the popover position
			computed = window.getComputedStyle(display[0]);
			var popoverSizes = display.offset();

popoverSizes.height = display.outerHeight();
			popoverSizes.width = display.outerWidth();
			popoverSizes.right = popoverSizes.left + popoverSizes.width;
			popoverSizes.bottom = popoverSizes.top + popoverSizes.height;
			popoverSizes.marginTop = parseFloat(computed.marginTop);
			popoverSizes.marginBottom = parseFloat(computed.marginBottom);

// First position per the class requirements - pop up and right align
			if (options.dropup) {
				top = buttonPosition.top - popoverSizes.height - popoverSizes.marginTop - popoverSizes.marginBottom;
			}

if (options.align === 'button-right' || display.hasClass( options.rightAlignClassName )) {
				left = buttonPosition.left - popoverSizes.width + hostNode.outerWidth(); 
			}

// Container alignment - make sure it doesn't overflow the table container
			if (options.align === 'dt-container' || options.align === 'container') {
				if (left < buttonPosition.left) {
					left = -buttonPosition.left;
				}

if (left + popoverSizes.width > tableSizes.width) {
					left = tableSizes.width - popoverSizes.width;
				}
			}

// Window adjustment
			if (containerPosition.left + left + popoverSizes.width > $(window).width()) {
				// Overflowing the document to the right
				left = $(window).width() - popoverSizes.width - containerPosition.left;
			}

if (buttonOffset.left + left < 0) {
				// Off to the left of the document
				left = -buttonOffset.left;
			}

if (containerPosition.top + top + popoverSizes.height > $(window).height() + $(window).scrollTop()) {
				// Pop up if otherwise we'd need the user to scroll down
				top = buttonPosition.top - popoverSizes.height - popoverSizes.marginTop - popoverSizes.marginBottom;
			}

if (containerPosition.top + top < $(window).scrollTop()) {
				// Correction for when the top is beyond the top of the page
				top = buttonPosition.top + hostNode.outerHeight();
			}

// Calculations all done - now set it
			display.css( {
				top: top,
				left: left
			} );
		}
		else {
			// Fix position - centre on screen
			var position = function () {
				var half = $(window).height() / 2;

var top = display.height() / 2;
				if ( top > half ) {
					top = half;
				}

display.css( 'marginTop', top*-1 );
			};

position();

$(window).on('resize.dtb-collection', function () {
				position();
			});
		}

if ( options.background ) {
			Buttons.background(
				true,
				options.backgroundClassName,
				options.fade,
				options.backgroundHost || hostNode
			);
		}

// This is bonkers, but if we don't have a click listener on the
		// background element, iOS Safari will ignore the body click
		// listener below. An empty function here is all that is
		// required to make it work...
		$('div.dt-button-background').on( 'click.dtb-collection', function () {} );

if ( options.autoClose ) {
			setTimeout( function () {
				dt.on( 'buttons-action.b-internal', function (e, btn, dt, node) {
					if ( node[0] === hostNode[0] ) {
						return;
					}
					close();
				} );
			}, 0);
		}
		
		$(display).trigger('buttons-popover.dt');

dt.on('destroy', close);

setTimeout(function() {
			closed = false;
			$('body')
				.on( 'click.dtb-collection', function (e) {
					if (closed) {
						return;
					}

// andSelf is deprecated in jQ1.8, but we want 1.7 compat
					var back = $.fn.addBack ? 'addBack' : 'andSelf';
					var parent = $(e.target).parent()[0];
	
					if (( ! $(e.target).parents()[back]().filter( content ).length  && !$(parent).hasClass('dt-buttons')) || $(e.target).hasClass('dt-button-background')) {
						close();
					}
				} )
				.on( 'keyup.dtb-collection', function (e) {
					if ( e.keyCode === 27 ) {
						close();
					}
				} );
		}, 0);
	}
} );

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

/**
 * Show / hide a background layer behind a collection
 * @param  {boolean} Flag to indicate if the background should be shown or
 *   hidden 
 * @param  {string} Class to assign to the background
 * @static
 */
Buttons.background = function ( show, className, fade, insertPoint ) {
	if ( fade === undefined ) {
		fade = 400;
	}
	if ( ! insertPoint ) {
		insertPoint = document.body;
	}

if ( show ) {
		_fadeIn(
			$('<div/>')
				.addClass( className )
				.css( 'display', 'none' )
				.insertAfter( insertPoint ),
			fade
		);
	}
	else {
		_fadeOut(
			$('div.'+className),
			fade,
			function () {
				$(this)
					.removeClass( className )
					.remove();
			}
		);
	}
};

/**
 * Instance selector - select Buttons instances based on an instance selector
 * value from the buttons assigned to a DataTable. This is only useful if
 * multiple instances are attached to a DataTable.
 * @param  {string|int|array} Instance selector - see `instance-selector`
 *   documentation on the DataTables site
 * @param  {array} Button instance array that was attached to the DataTables
 *   settings object
 * @return {array} Buttons instances
 * @static
 */
Buttons.instanceSelector = function ( group, buttons )
{
	if ( group === undefined || group === null ) {
		return $.map( buttons, function ( v ) {
			return v.inst;
		} );
	}

var ret = [];
	var names = $.map( buttons, function ( v ) {
		return v.name;
	} );

// Flatten the group selector into an array of single options
	var process = function ( input ) {
		if ( Array.isArray( input ) ) {
			for ( var i=0, ien=input.length ; i<ien ; i++ ) {
				process( input[i] );
			}
			return;
		}

if ( typeof input === 'string' ) {
			if ( input.indexOf( ',' ) !== -1 ) {
				// String selector, list of names
				process( input.split(',') );
			}
			else {
				// String selector individual name
				var idx = $.inArray( input.trim(), names );

if ( idx !== -1 ) {
					ret.push( buttons[ idx ].inst );
				}
			}
		}
		else if ( typeof input === 'number' ) {
			// Index selector
			ret.push( buttons[ input ].inst );
		}
		else if ( typeof input === 'object' ) {
			// Actual instance selector
			ret.push( input );
		}
	};
	
	process( group );

return ret;
};

/**
 * Button selector - select one or more buttons from a selector input so some
 * operation can be performed on them.
 * @param  {array} Button instances array that the selector should operate on
 * @param  {string|int|node|jQuery|array} Button selector - see
 *   `button-selector` documentation on the DataTables site
 * @return {array} Array of objects containing `inst` and `idx` properties of
 *   the selected buttons so you know which instance each button belongs to.
 * @static
 */
Buttons.buttonSelector = function ( insts, selector )
{
	var ret = [];
	var nodeBuilder = function ( a, buttons, baseIdx ) {
		var button;
		var idx;

for ( var i=0, ien=buttons.length ; i<ien ; i++ ) {
			button = buttons[i];

if ( button ) {
				idx = baseIdx !== undefined ?
					baseIdx+i :
					i+'';

a.push( {
					node: button.node,
					name: button.conf.name,
					idx:  idx
				} );

if ( button.buttons ) {
					nodeBuilder( a, button.buttons, idx+'-' );
				}
			}
		}
	};

var run = function ( selector, inst ) {
		var i, ien;
		var buttons = [];
		nodeBuilder( buttons, inst.s.buttons );

var nodes = $.map( buttons, function (v) {
			return v.node;
		} );

if ( Array.isArray( selector ) || selector instanceof $ ) {
			for ( i=0, ien=selector.length ; i<ien ; i++ ) {
				run( selector[i], inst );
			}
			return;
		}

if ( selector === null || selector === undefined || selector === '*' ) {
			// Select all
			for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
				ret.push( {
					inst: inst,
					node: buttons[i].node
				} );
			}
		}
		else if ( typeof selector === 'number' ) {
			// Main button index selector
			if (inst.s.buttons[ selector ]) {
				ret.push( {
					inst: inst,
					node: inst.s.buttons[ selector ].node
				} );
			}
		}
		else if ( typeof selector === 'string' ) {
			if ( selector.indexOf( ',' ) !== -1 ) {
				// Split
				var a = selector.split(',');

for ( i=0, ien=a.length ; i<ien ; i++ ) {
					run( a[i].trim(), inst );
				}
			}
			else if ( selector.match( /^\d+(\-\d+)*$/ ) ) {
				// Sub-button index selector
				var indexes = $.map( buttons, function (v) {
					return v.idx;
				} );

ret.push( {
					inst: inst,
					node: buttons[ $.inArray( selector, indexes ) ].node
				} );
			}
			else if ( selector.indexOf( ':name' ) !== -1 ) {
				// Button name selector
				var name = selector.replace( ':name', '' );

for ( i=0, ien=buttons.length ; i<ien ; i++ ) {
					if ( buttons[i].name === name ) {
						ret.push( {
							inst: inst,
							node: buttons[i].node
						} );
					}
				}
			}
			else {
				// jQuery selector on the nodes
				$( nodes ).filter( selector ).each( function () {
					ret.push( {
						inst: inst,
						node: this
					} );
				} );
			}
		}
		else if ( typeof selector === 'object' && selector.nodeName ) {
			// Node selector
			var idx = $.inArray( selector, nodes );

if ( idx !== -1 ) {
				ret.push( {
					inst: inst,
					node: nodes[ idx ]
				} );
			}
		}
	};

for ( var i=0, ien=insts.length ; i<ien ; i++ ) {
		var inst = insts[i];

run( selector, inst );
	}

return ret;
};

/**
 * Default function used for formatting output data.
 * @param {*} str Data to strip
 */
Buttons.stripData = function ( str, config ) {
	if ( typeof str !== 'string' ) {
		return str;
	}

// Always remove script tags
	str = str.replace( /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi, '' );

// Always remove comments
	str = str.replace( /<!\-\-.*?\-\->/g, '' );

if ( ! config || config.stripHtml ) {
		str = str.replace( /<[^>]*>/g, '' );
	}

if ( ! config || config.trim ) {
		str = str.replace( /^\s+|\s+$/g, '' );
	}

if ( ! config || config.stripNewlines ) {
		str = str.replace( /\n/g, ' ' );
	}

if ( ! config || config.decodeEntities ) {
		_exportTextarea.innerHTML = str;
		str = _exportTextarea.value;
	}

return str;
};

/**
 * Buttons defaults. For full documentation, please refer to the docs/option
 * directory or the DataTables site.
 * @type {Object}
 * @static
 */
Buttons.defaults = {
	buttons: [ 'copy', 'excel', 'csv', 'pdf', 'print' ],
	name: 'main',
	tabIndex: 0,
	dom: {
		container: {
			tag: 'div',
			className: 'dt-buttons'
		},
		collection: {
			tag: 'div',
			className: ''
		},
		button: {
			tag: 'button',
			className: 'dt-button',
			active: 'active',
			disabled: 'disabled',
			spacerClass: ''
		},
		buttonLiner: {
			tag: 'span',
			className: ''
		},
		split: {
			tag: 'div',
			className: 'dt-button-split',
		},
		splitWrapper: {
			tag: 'div',
			className: 'dt-btn-split-wrapper',
		},
		splitDropdown: {
			tag: 'button',
			text: '&#x25BC;',
			className: 'dt-btn-split-drop',
			align: 'split-right',
			splitAlignClass: 'dt-button-split-left'
		},
		splitDropdownButton: {
			tag: 'button',
			className: 'dt-btn-split-drop-button dt-button',
		},
		splitCollection: {
			tag: 'div',
			className: 'dt-button-split-collection',
		}
	}
};

/**
 * Version information
 * @type {string}
 * @static
 */
Buttons.version = '2.2.2';

$.extend( _dtButtons, {
	collection: {
		text: function ( dt ) {
			return dt.i18n( 'buttons.collection', 'Collection' );
		},
		className: 'buttons-collection',
		closeButton: false,
		init: function ( dt, button, config ) {
			button.attr( 'aria-expanded', false );
		},
		action: function ( e, dt, button, config ) {
			if ( config._collection.parents('body').length ) {
				this.popover(false, config);
			}
			else {
				this.popover(config._collection, config);
			}
		},
		attr: {
			'aria-haspopup': true
		}
		// Also the popover options, defined in Buttons.popover
	},
	split: {
		text: function ( dt ) {
			return dt.i18n( 'buttons.split', 'Split' );
		},
		className: 'buttons-split',
		closeButton: false,
		init: function ( dt, button, config ) {
			return button.attr( 'aria-expanded', false );
		},
		action: function ( e, dt, button, config ) {
			this.popover(config._collection, config);
		},
		attr: {
			'aria-haspopup': true
		}
		// Also the popover options, defined in Buttons.popover
	},
	copy: function ( dt, conf ) {
		if ( _dtButtons.copyHtml5 ) {
			return 'copyHtml5';
		}
	},
	csv: function ( dt, conf ) {
		if ( _dtButtons.csvHtml5 && _dtButtons.csvHtml5.available( dt, conf ) ) {
			return 'csvHtml5';
		}
	},
	excel: function ( dt, conf ) {
		if ( _dtButtons.excelHtml5 && _dtButtons.excelHtml5.available( dt, conf ) ) {
			return 'excelHtml5';
		}
	},
	pdf: function ( dt, conf ) {
		if ( _dtButtons.pdfHtml5 && _dtButtons.pdfHtml5.available( dt, conf ) ) {
			return 'pdfHtml5';
		}
	},
	pageLength: function ( dt ) {
		var lengthMenu = dt.settings()[0].aLengthMenu;
		var vals = [];
		var lang = [];
		var text = function ( dt ) {
			return dt.i18n( 'buttons.pageLength', {
				"-1": 'Show all rows',
				_:    'Show %d rows'
			}, dt.page.len() );
		};

// Support for DataTables 1.x 2D array
		if (Array.isArray( lengthMenu[0] )) {
			vals = lengthMenu[0];
			lang = lengthMenu[1];
		}
		else {
			for (var i=0 ; i<lengthMenu.length ; i++) {
				var option = lengthMenu[i];

// Support for DataTables 2 object in the array
				if ($.isPlainObject(option)) {
					vals.push(option.value);
					lang.push(option.label);
				}
				else {
					vals.push(option);
					lang.push(option);
				}
			}
		}

return {
			extend: 'collection',
			text: text,
			className: 'buttons-page-length',
			autoClose: true,
			buttons: $.map( vals, function ( val, i ) {
				return {
					text: lang[i],
					className: 'button-page-length',
					action: function ( e, dt ) {
						dt.page.len( val ).draw();
					},
					init: function ( dt, node, conf ) {
						var that = this;
						var fn = function () {
							that.active( dt.page.len() === val );
						};

dt.on( 'length.dt'+conf.namespace, fn );
						fn();
					},
					destroy: function ( dt, node, conf ) {
						dt.off( 'length.dt'+conf.namespace );
					}
				};
			} ),
			init: function ( dt, node, conf ) {
				var that = this;
				dt.on( 'length.dt'+conf.namespace, function () {
					that.text( conf.text );
				} );
			},
			destroy: function ( dt, node, conf ) {
				dt.off( 'length.dt'+conf.namespace );
			}
		};
	},
	spacer: {
		style: 'empty',
		spacer: true,
		text: function ( dt ) {
			return dt.i18n( 'buttons.spacer', '' );
		}
	}
} );

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

// Buttons group and individual button selector
DataTable.Api.register( 'buttons()', function ( group, selector ) {
	// Argument shifting
	if ( selector === undefined ) {
		selector = group;
		group = undefined;
	}

this.selector.buttonGroup = group;

var res = this.iterator( true, 'table', function ( ctx ) {
		if ( ctx._buttons ) {
			return Buttons.buttonSelector(
				Buttons.instanceSelector( group, ctx._buttons ),
				selector
			);
		}
	}, true );

res._groupSelector = group;
	return res;
} );

// Individual button selector
DataTable.Api.register( 'button()', function ( group, selector ) {
	// just run buttons() and truncate
	var buttons = this.buttons( group, selector );

if ( buttons.length > 1 ) {
		buttons.splice( 1, buttons.length );
	}

return buttons;
} );

// Active buttons
DataTable.Api.registerPlural( 'buttons().active()', 'button().active()', function ( flag ) {
	if ( flag === undefined ) {
		return this.map( function ( set ) {
			return set.inst.active( set.node );
		} );
	}

return this.each( function ( set ) {
		set.inst.active( set.node, flag );
	} );
} );

// Get / set button action
DataTable.Api.registerPlural( 'buttons().action()', 'button().action()', function ( action ) {
	if ( action === undefined ) {
		return this.map( function ( set ) {
			return set.inst.action( set.node );
		} );
	}

return this.each( function ( set ) {
		set.inst.action( set.node, action );
	} );
} );

// Collection control
DataTable.Api.registerPlural( 'buttons().collectionRebuild()', 'button().collectionRebuild()', function ( buttons ) {
	return this.each( function ( set ) {
		for(var i = 0; i < buttons.length; i++) {
			if(typeof buttons[i] === 'object') {
				buttons[i].parentConf = set;
			}
		}
		set.inst.collectionRebuild( set.node, buttons );
	} );
} );

// Enable / disable buttons
DataTable.Api.register( ['buttons().enable()', 'button().enable()'], function ( flag ) {
	return this.each( function ( set ) {
		set.inst.enable( set.node, flag );
	} );
} );

// Disable buttons
DataTable.Api.register( ['buttons().disable()', 'button().disable()'], function () {
	return this.each( function ( set ) {
		set.inst.disable( set.node );
	} );
} );

// Button index
DataTable.Api.register( 'button().index()', function () {
	var idx = null;

this.each( function ( set ) {
		var res = set.inst.index( set.node );

if (res !== null) {
			idx = res;
		}
	} );

return idx;
} );

// Get button nodes
DataTable.Api.registerPlural( 'buttons().nodes()', 'button().node()', function () {
	var jq = $();

// jQuery will automatically reduce duplicates to a single entry
	$( this.each( function ( set ) {
		jq = jq.add( set.inst.node( set.node ) );
	} ) );

return jq;
} );

// Get / set button processing state
DataTable.Api.registerPlural( 'buttons().processing()', 'button().processing()', function ( flag ) {
	if ( flag === undefined ) {
		return this.map( function ( set ) {
			return set.inst.processing( set.node );
		} );
	}

return this.each( function ( set ) {
		set.inst.processing( set.node, flag );
	} );
} );

// Get / set button text (i.e. the button labels)
DataTable.Api.registerPlural( 'buttons().text()', 'button().text()', function ( label ) {
	if ( label === undefined ) {
		return this.map( function ( set ) {
			return set.inst.text( set.node );
		} );
	}

return this.each( function ( set ) {
		set.inst.text( set.node, label );
	} );
} );

// Trigger a button's action
DataTable.Api.registerPlural( 'buttons().trigger()', 'button().trigger()', function () {
	return this.each( function ( set ) {
		set.inst.node( set.node ).trigger( 'click' );
	} );
} );

// Button resolver to the popover
DataTable.Api.register( 'button().popover()', function (content, options) {
	return this.map( function ( set ) {
		return set.inst._popover( content, this.button(this[0].node), options );
	} );
} );

// Get the container elements
DataTable.Api.register( 'buttons().containers()', function () {
	var jq = $();
	var groupSelector = this._groupSelector;

// We need to use the group selector directly, since if there are no buttons
	// the result set will be empty
	this.iterator( true, 'table', function ( ctx ) {
		if ( ctx._buttons ) {
			var insts = Buttons.instanceSelector( groupSelector, ctx._buttons );

for ( var i=0, ien=insts.length ; i<ien ; i++ ) {
				jq = jq.add( insts[i].container() );
			}
		}
	} );

return jq;
} );

DataTable.Api.register( 'buttons().container()', function () {
	// API level of nesting is `buttons()` so we can zip into the containers method
	return this.containers().eq(0);
} );

// Add a new button
DataTable.Api.register( 'button().add()', function ( idx, conf, draw ) {
	var ctx = this.context;

// Don't use `this` as it could be empty - select the instances directly
	if ( ctx.length ) {
		var inst = Buttons.instanceSelector( this._groupSelector, ctx[0]._buttons );

if ( inst.length ) {
			inst[0].add( conf, idx , draw);
		}
	}

return this.button( this._groupSelector, idx );
} );

// Destroy the button sets selected
DataTable.Api.register( 'buttons().destroy()', function () {
	this.pluck( 'inst' ).unique().each( function ( inst ) {
		inst.destroy();
	} );

return this;
} );

// Remove a button
DataTable.Api.registerPlural( 'buttons().remove()', 'buttons().remove()', function () {
	this.each( function ( set ) {
		set.inst.remove( set.node );
	} );

return this;
} );

// Information box that can be used by buttons
var _infoTimer;
DataTable.Api.register( 'buttons.info()', function ( title, message, time ) {
	var that = this;

if ( title === false ) {
		this.off('destroy.btn-info');
		_fadeOut(
			$('#datatables_buttons_info'),
			400,
			function () {
				$(this).remove();
			}
		);
		clearTimeout( _infoTimer );
		_infoTimer = null;

return this;
	}

if ( _infoTimer ) {
		clearTimeout( _infoTimer );
	}

if ( $('#datatables_buttons_info').length ) {
		$('#datatables_buttons_info').remove();
	}

title = title ? '<h2>'+title+'</h2>' : '';

_fadeIn(
		$('<div id="datatables_buttons_info" class="dt-button-info"/>')
			.html( title )
			.append( $('<div/>')[ typeof message === 'string' ? 'html' : 'append' ]( message ) )
			.css( 'display', 'none' )
			.appendTo( 'body' )
	);

if ( time !== undefined && time !== 0 ) {
		_infoTimer = setTimeout( function () {
			that.buttons.info( false );
		}, time );
	}

this.on('destroy.btn-info', function () {
		that.buttons.info(false);
	});

return this;
} );

// Get data from the table for export - this is common to a number of plug-in
// buttons so it is included in the Buttons core library
DataTable.Api.register( 'buttons.exportData()', function ( options ) {
	if ( this.context.length ) {
		return _exportData( new DataTable.Api( this.context[0] ), options );
	}
} );

// Get information about the export that is common to many of the export data
// types (DRY)
DataTable.Api.register( 'buttons.exportInfo()', function ( conf ) {
	if ( ! conf ) {
		conf = {};
	}

return {
		filename: _filename( conf ),
		title: _title( conf ),
		messageTop: _message(this, conf.message || conf.messageTop, 'top'),
		messageBottom: _message(this, conf.messageBottom, 'bottom')
	};
} );

/**
 * Get the file name for an exported file.
 *
 * @param {object}	config Button configuration
 * @param {boolean} incExtension Include the file name extension
 */
var _filename = function ( config )
{
	// Backwards compatibility
	var filename = config.filename === '*' && config.title !== '*' && config.title !== undefined && config.title !== null && config.title !== '' ?
		config.title :
		config.filename;

if ( typeof filename === 'function' ) {
		filename = filename();
	}

if ( filename === undefined || filename === null ) {
		return null;
	}

if ( filename.indexOf( '*' ) !== -1 ) {
		filename = filename.replace( '*', $('head > title').text() ).trim();
	}

// Strip characters which the OS will object to
	filename = filename.replace(/[^a-zA-Z0-9_\u00A1-\uFFFF\.,\-_ !]/g, "");

var extension = _stringOrFunction( config.extension );
	if ( ! extension ) {
		extension = '';
	}

return filename + extension;
};

/**
 * Simply utility method to allow parameters to be given as a function
 *
 * @param {undefined|string|function} option Option
 * @return {null|string} Resolved value
 */
var _stringOrFunction = function ( option )
{
	if ( option === null || option === undefined ) {
		return null;
	}
	else if ( typeof option === 'function' ) {
		return option();
	}
	return option;
};

/**
 * Get the title for an exported file.
 *
 * @param {object} config	Button configuration
 */
var _title = function ( config )
{
	var title = _stringOrFunction( config.title );

return title === null ?
		null : title.indexOf( '*' ) !== -1 ?
			title.replace( '*', $('head > title').text() || 'Exported data' ) :
			title;
};

var _message = function ( dt, option, position )
{
	var message = _stringOrFunction( option );
	if ( message === null ) {
		return null;
	}

var caption = $('caption', dt.table().container()).eq(0);
	if ( message === '*' ) {
		var side = caption.css( 'caption-side' );
		if ( side !== position ) {
			return null;
		}

return caption.length ?
			caption.text() :
			'';
	}

return message;
};

var header = dt.columns( config.columns ).indexes().map( function (idx) {
		var el = dt.column( idx ).header();
		return config.format.header( el.innerHTML, idx, el );
	} ).toArray();

var rowIndexes = dt.rows( config.rows, modifier ).indexes().toArray();
	var selectedCells = dt.cells( rowIndexes, config.columns );
	var cells = selectedCells
		.render( config.orthogonal )
		.toArray();
	var cellNodes = selectedCells
		.nodes()
		.toArray();

var columns = header.length;
	var rows = columns > 0 ? cells.length / columns : 0;
	var body = [];
	var cellCounter = 0;

for ( var i=0, ien=rows ; i<ien ; i++ ) {
		var row = [ columns ];

for ( var j=0 ; j<columns ; j++ ) {
			row[j] = config.format.body( cells[ cellCounter ], i, j, cellNodes[ cellCounter ] );
			cellCounter++;
		}

body[i] = row;
	}

var data = {
		header: header,
		footer: footer,
		body:   body
	};

if ( config.customizeData ) {
		config.customizeData( data );
	}

return data;
};

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * DataTables interface
 */

// Attach to DataTables objects for global access
$.fn.dataTable.Buttons = Buttons;
$.fn.DataTable.Buttons = Buttons;

// DataTables creation - check if the buttons have been defined for this table,
// they will have been if the `B` option was used in `dom`, otherwise we should
// create the buttons instance here so they can be inserted into the document
// using the API. Listen for `init` for compatibility with pre 1.10.10, but to
// be removed in future.
$(document).on( 'init.dt plugin-init.dt', function (e, settings) {
	if ( e.namespace !== 'dt' ) {
		return;
	}

var opts = settings.oInit.buttons || DataTable.defaults.buttons;

if ( opts && ! settings._buttons ) {
		new Buttons( settings, opts ).container();
	}
} );

function _init ( settings, options ) {
	var api = new DataTable.Api( settings );
	var opts = options
		? options
		: api.init().buttons || DataTable.defaults.buttons;

return new Buttons( api, opts ).container();
}

// DataTables `dom` feature option
DataTable.ext.feature.push( {
	fnInit: _init,
	cFeature: "B"
} );

// DataTables 2 layout feature
if ( DataTable.ext.features ) {
	DataTable.ext.features.register( 'buttons', _init );
}

return Buttons;
}));

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