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File Content: `clone.js`

( function ( $, rwmb ) {
	'use strict';

	// Object holds all methods related to fields' index when clone
	var cloneIndex = {
		/**
		 * Set index for fields in a .rwmb-clone
		 * @param $inputs .rwmb-clone element
		 * @param index Index value
		 */
		set: function ( $inputs, index ) {
			$inputs.each( function () {
				var $field = $( this );

				// Name attribute
				var name = this.name;
				if ( name && ! $field.closest( '.rwmb-group-clone' ).length ) {
					$field.attr( 'name', cloneIndex.replace( index, name, '[', ']', false ) );
				}

				// ID attribute
				var id = this.id;
				if ( id ) {
					$field.attr( 'id', cloneIndex.replace( index, id, '_', '', true, true ) );
				}

				$field.trigger( 'update_index', index );
			} );
		},

		/**
		 * Replace an attribute of a field with updated index
		 * @param index New index value
		 * @param value Attribute value
		 * @param before String before returned value
		 * @param after String after returned value
		 * @param alternative Check if attribute does not contain any integer, will reset the attribute?
		 * @param isEnd Check if we find string at the end?
		 * @return string
		 */
		replace: function ( index, value, before, after, alternative, isEnd ) {
			before = before || '';
			after = after || '';

			if ( typeof alternative === 'undefined' ) {
				alternative = true;
			}

			var end = isEnd ? '$' : '';

			var regex = new RegExp( cloneIndex.escapeRegex( before ) + '(\\d+)' + cloneIndex.escapeRegex( after ) + end ),
				newValue = before + index + after;

			return regex.test( value ) ? value.replace( regex, newValue ) : (alternative ? value + newValue : value );
		},

		/**
		 * Helper function to escape string in regular expression
		 * @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
		 * @param string
		 * @return string
		 */
		escapeRegex: function ( string ) {
			return string.replace( /[.*+?^${}()|[\]\\]/g, "\\$&" );
		},

		/**
		 * Helper function to create next index for clones
		 * @param $container .rwmb-input container
		 * @return integer
		 */
		nextIndex: function ( $container ) {
			var nextIndex = $container.data( 'next-index' );
			$container.data( 'next-index', nextIndex + 1 );
			return nextIndex;
		}
	};

	// Object holds all method related to fields' value when clone.
	var cloneValue = {
		setDefault: function() {
			var $field = $( this );

			if ( true !== $field.data( 'clone-default' ) ) {
				return;
			}

			var type = $field.attr( 'type' ),
				defaultValue = $field.data( 'default' );

			if ( 'radio' === type ) {
				$field.prop( 'checked', $field.val() === defaultValue );
			} else if ( $field.hasClass( 'rwmb-checkbox' ) || $field.hasClass( 'rwmb-switch' ) ) {
				$field.prop( 'checked', !! defaultValue );
			} else if ( $field.hasClass( 'rwmb-checkbox_list' ) ) {
				var value = $field.val();
				$field.prop( 'checked', Array.isArray( defaultValue ) ? -1 !== defaultValue.indexOf( value ) : value == defaultValue );
			} else if ( 'select' === type ) {
				$field.find( 'option[value="' + defaultValue + '"]' ).prop( 'selected', true );
			} else if ( ! $field.hasClass( 'rwmb-hidden' ) ) {
				$field.val( defaultValue );
			}
		},
		clear: function() {
			var $field = $( this ),
				type = $field.attr( 'type' );

			if ( 'radio' === type || 'checkbox' === type ) {
				$field.prop( 'checked', false );
			} else if ( 'select' === type ) {
				$field.prop( 'selectedIndex', - 1 );
			} else if ( ! $field.hasClass( 'rwmb-hidden' ) ) {
				$field.val( '' );
			}
		}
	};

	/**
	 * Clone fields
	 * @param $container A div container which has all fields
	 */
	function clone( $container ) {
		var $last = $container.children( '.rwmb-clone' ).last(),
			$clone = $last.clone(),
			nextIndex = cloneIndex.nextIndex( $container );

		// Clear fields' values.
		var $inputs = $clone.find( rwmb.inputSelectors );
		$inputs.each( cloneValue.clear );

		// Insert clone.
		$clone.insertAfter( $last );

		// Trigger custom event for the clone instance. Required for Group extension to update sub fields.
		$clone.trigger( 'clone_instance', nextIndex );

		// Set fields index. Must run before trigger clone event.
		cloneIndex.set( $inputs, nextIndex );

		// Set fields' default values: do after index is set to prevent previous radio fields from unchecking.
		$inputs.each( cloneValue.setDefault );

		// Trigger custom clone event.
		$inputs.trigger( 'clone', nextIndex );

		// After cloning fields.
		$inputs.trigger( 'after_clone', nextIndex );

		// Trigger custom change event for MB Blocks to update block attributes.
		$inputs.first().trigger( 'mb_change' );
	}

	/**
	 * Hide remove buttons when there's only 1 of them
	 *
	 * @param $container .rwmb-input container
	 */
	function toggleRemoveButtons( $container ) {
		var $clones = $container.children( '.rwmb-clone' );
		$clones.children( '.remove-clone' ).toggle( $clones.length > 1 );

		// Recursive for nested groups.
		$container.find( '.rwmb-input' ).each( function () {
			toggleRemoveButtons( $( this ) );
		} );
	}

	/**
	 * Toggle add button
	 * Used with [data-max-clone] attribute. When max clone is reached, the add button is hid and vice versa
	 *
	 * @param $container .rwmb-input container
	 */
	function toggleAddButton( $container ) {
		var $button = $container.children( '.add-clone' ),
			maxClone = parseInt( $container.data( 'max-clone' ) ),
			numClone = $container.children( '.rwmb-clone' ).length;

		$button.toggle( isNaN( maxClone ) || ( maxClone && numClone < maxClone ) );
	}

	function addClone( e ) {
		e.preventDefault();

		var $container = $( this ).closest( '.rwmb-input' );
		clone( $container );

		toggleRemoveButtons( $container );
		toggleAddButton( $container );
		sortClones.apply( $container[0] );
	}

	function removeClone( e ) {
		e.preventDefault();

		var $this = $( this ),
			$container = $this.closest( '.rwmb-input' );

		// Remove clone only if there are 2 or more of them
		if ( $container.children( '.rwmb-clone' ).length < 2 ) {
			return;
		}

		$this.parent().trigger( 'remove' ).remove();
		toggleRemoveButtons( $container );
		toggleAddButton( $container );

		// Trigger custom change event for MB Blocks to update block attributes.
		$container.find( rwmb.inputSelectors ).first().trigger( 'mb_change' );
	}

	/**
	 * Sort clones.
	 * Expect this = .rwmb-input element.
	 */
	function sortClones() {
		var $container = $( this );

		if ( undefined !== $container.sortable( 'instance' ) ) {
			return;
		}
		if ( 0 === $container.children( '.rwmb-clone' ).length ) {
			return;
		}

		$container.sortable( {
			handle: '.rwmb-clone-icon',
			placeholder: ' rwmb-clone rwmb-sortable-placeholder',
			items: '> .rwmb-clone',
			start: function ( event, ui ) {
				// Make the placeholder has the same height as dragged item
				ui.placeholder.height( ui.item.outerHeight() );
			},
			stop: function( event, ui ) {
				ui.item.trigger( 'mb_init_editors' );
				ui.item.find( rwmb.inputSelectors ).first().trigger( 'mb_change' );
			}
		} );
	}

	function start() {
		var $container = $( this );
		toggleRemoveButtons( $container );
		toggleAddButton( $container );

		$container.data( 'next-index', $container.children( '.rwmb-clone' ).length );
		sortClones.apply( this );
	}

	function init( e ) {
		$( e.target ).find( '.rwmb-input' ).each( start );
	}

	rwmb.$document
		.on( 'mb_ready', init )
		.on( 'click', '.add-clone', addClone )
		.on( 'click', '.remove-clone', removeClone );

	// Export for use outside.
	rwmb.cloneIndex = cloneIndex;
	rwmb.cloneValue = cloneValue;
	rwmb.sortClones = sortClones;
	rwmb.toggleRemoveButtons = toggleRemoveButtons;
	rwmb.toggleAddButton = toggleAddButton;
} )( jQuery, rwmb );

Name	Size	Permission
jqueryui	---	0755
select2	---	0755
wp-color-picker-alpha	---	0755
autocomplete.js	1660 bytes	0644
autosave.js	595 bytes	0644
button-group.js	1009 bytes	0644
clone.js	7725 bytes	0644
color.js	1051 bytes	0644
date.js	2019 bytes	0644
datetime.js	2425 bytes	0644
file-input.js	1155 bytes	0644
file-upload.js	2761 bytes	0644
file.js	3894 bytes	0644
image-advanced.js	1015 bytes	0644
image-select.js	645 bytes	0644
image-upload.js	1000 bytes	0644
input-list.js	1088 bytes	0644
map-frontend.js	1849 bytes	0644
map.js	7758 bytes	0644
media.js	15835 bytes	0644
notification.js	346 bytes	0644
oembed.js	845 bytes	0644
osm-frontend.js	1224 bytes	0644
osm.js	7563 bytes	0644
range.js	458 bytes	0644
script.js	776 bytes	0644
select-advanced.js	3151 bytes	0644
select-tree.js	1663 bytes	0644
select.js	533 bytes	0644
slider.js	922 bytes	0644
taxonomy.js	257 bytes	0644
time.js	1379 bytes	0644
validation.min.js	51218 bytes	0644
video.js	1146 bytes	0644
wysiwyg.js	5499 bytes	0644

File Content: clone.js

File Content: `clone.js`