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Edit File : customize-widgets.js \| Size : 70.02 KB
/** * @output wp-admin/js/customize-widgets.js / / global _wpCustomizeWidgetsSettings / (function( wp, $ ){ if ( ! wp \|\| ! wp.customize ) { return; } // Set up our namespace... var api = wp.customize, l10n; /* * @namespace wp.customize.Widgets / api.Widgets = api.Widgets \|\| {}; api.Widgets.savedWidgetIds = {}; // Link settings. api.Widgets.data = _wpCustomizeWidgetsSettings \|\| {}; l10n = api.Widgets.data.l10n; /* * wp.customize.Widgets.WidgetModel * * A single widget model. * * @class wp.customize.Widgets.WidgetModel * @augments Backbone.Model / api.Widgets.WidgetModel = Backbone.Model.extend(/* @lends wp.customize.Widgets.WidgetModel.prototype /{ id: null, temp_id: null, classname: null, control_tpl: null, description: null, is_disabled: null, is_multi: null, multi_number: null, name: null, id_base: null, transport: null, params: [], width: null, height: null, search_matched: true }); /* * wp.customize.Widgets.WidgetCollection * * Collection for widget models. * * @class wp.customize.Widgets.WidgetCollection * @augments Backbone.Collection / api.Widgets.WidgetCollection = Backbone.Collection.extend(/* @lends wp.customize.Widgets.WidgetCollection.prototype /{ model: api.Widgets.WidgetModel, // Controls searching on the current widget collection // and triggers an update event. doSearch: function( value ) { // Don't do anything if we've already done this search. // Useful because the search handler fires multiple times per keystroke. if ( this.terms === value ) { return; } // Updates terms with the value passed. this.terms = value; // If we have terms, run a search... if ( this.terms.length > 0 ) { this.search( this.terms ); } // If search is blank, set all the widgets as they matched the search to reset the views. if ( this.terms === '' ) { this.each( function ( widget ) { widget.set( 'search_matched', true ); } ); } }, // Performs a search within the collection. // @uses RegExp search: function( term ) { var match, haystack; // Escape the term string for RegExp meta characters. term = term.replace( /[-\/\\^$+?.()\|[\]{}]/g, '\\$&' ); // Consider spaces as word delimiters and match the whole string // so matching terms can be combined. term = term.replace( / /g, ')(?=.' ); match = new RegExp( '^(?=.' + term + ').+', 'i' ); this.each( function ( data ) { haystack = [ data.get( 'name' ), data.get( 'description' ) ].join( ' ' ); data.set( 'search_matched', match.test( haystack ) ); } ); } }); api.Widgets.availableWidgets = new api.Widgets.WidgetCollection( api.Widgets.data.availableWidgets ); /** * wp.customize.Widgets.SidebarModel * * A single sidebar model. * * @class wp.customize.Widgets.SidebarModel * @augments Backbone.Model / api.Widgets.SidebarModel = Backbone.Model.extend(/* @lends wp.customize.Widgets.SidebarModel.prototype /{ after_title: null, after_widget: null, before_title: null, before_widget: null, 'class': null, description: null, id: null, name: null, is_rendered: false }); /* * wp.customize.Widgets.SidebarCollection * * Collection for sidebar models. * * @class wp.customize.Widgets.SidebarCollection * @augments Backbone.Collection / api.Widgets.SidebarCollection = Backbone.Collection.extend(/* @lends wp.customize.Widgets.SidebarCollection.prototype /{ model: api.Widgets.SidebarModel }); api.Widgets.registeredSidebars = new api.Widgets.SidebarCollection( api.Widgets.data.registeredSidebars ); api.Widgets.AvailableWidgetsPanelView = wp.Backbone.View.extend(/* @lends wp.customize.Widgets.AvailableWidgetsPanelView.prototype /{ el: '#available-widgets', events: { 'input #widgets-search': 'search', 'focus .widget-tpl' : 'focus', 'click .widget-tpl' : '_submit', 'keypress .widget-tpl' : '_submit', 'keydown' : 'keyboardAccessible' }, // Cache current selected widget. selected: null, // Cache sidebar control which has opened panel. currentSidebarControl: null, $search: null, $clearResults: null, searchMatchesCount: null, /* * View class for the available widgets panel. * * @constructs wp.customize.Widgets.AvailableWidgetsPanelView * @augments wp.Backbone.View / initialize: function() { var self = this; this.$search = $( '#widgets-search' ); this.$clearResults = this.$el.find( '.clear-results' ); _.bindAll( this, 'close' ); this.listenTo( this.collection, 'change', this.updateList ); this.updateList(); // Set the initial search count to the number of available widgets. this.searchMatchesCount = this.collection.length; / * If the available widgets panel is open and the customize controls * are interacted with (i.e. available widgets panel is blurred) then * close the available widgets panel. Also close on back button click. / $( '#customize-controls, #available-widgets .customize-section-title' ).on( 'click keydown', function( e ) { var isAddNewBtn = $( e.target ).is( '.add-new-widget, .add-new-widget ' ); if ( $( 'body' ).hasClass( 'adding-widget' ) && ! isAddNewBtn ) { self.close(); } } ); // Clear the search results and trigger an `input` event to fire a new search. this.$clearResults.on( 'click', function() { self.$search.val( '' ).trigger( 'focus' ).trigger( 'input' ); } ); // Close the panel if the URL in the preview changes. api.previewer.bind( 'url', this.close ); }, /** * Performs a search and handles selected widget. / search: _.debounce( function( event ) { var firstVisible; this.collection.doSearch( event.target.value ); // Update the search matches count. this.updateSearchMatchesCount(); // Announce how many search results. this.announceSearchMatches(); // Remove a widget from being selected if it is no longer visible. if ( this.selected && ! this.selected.is( ':visible' ) ) { this.selected.removeClass( 'selected' ); this.selected = null; } // If a widget was selected but the filter value has been cleared out, clear selection. if ( this.selected && ! event.target.value ) { this.selected.removeClass( 'selected' ); this.selected = null; } // If a filter has been entered and a widget hasn't been selected, select the first one shown. if ( ! this.selected && event.target.value ) { firstVisible = this.$el.find( '> .widget-tpl:visible:first' ); if ( firstVisible.length ) { this.select( firstVisible ); } } // Toggle the clear search results button. if ( '' !== event.target.value ) { this.$clearResults.addClass( 'is-visible' ); } else if ( '' === event.target.value ) { this.$clearResults.removeClass( 'is-visible' ); } // Set a CSS class on the search container when there are no search results. if ( ! this.searchMatchesCount ) { this.$el.addClass( 'no-widgets-found' ); } else { this.$el.removeClass( 'no-widgets-found' ); } }, 500 ), /* * Updates the count of the available widgets that have the `search_matched` attribute. / updateSearchMatchesCount: function() { this.searchMatchesCount = this.collection.where({ search_matched: true }).length; }, /* * Sends a message to the aria-live region to announce how many search results. / announceSearchMatches: function() { var message = l10n.widgetsFound.replace( '%d', this.searchMatchesCount ) ; if ( ! this.searchMatchesCount ) { message = l10n.noWidgetsFound; } wp.a11y.speak( message ); }, /* * Changes visibility of available widgets. / updateList: function() { this.collection.each( function( widget ) { var widgetTpl = $( '#widget-tpl-' + widget.id ); widgetTpl.toggle( widget.get( 'search_matched' ) && ! widget.get( 'is_disabled' ) ); if ( widget.get( 'is_disabled' ) && widgetTpl.is( this.selected ) ) { this.selected = null; } } ); }, /* * Highlights a widget. / select: function( widgetTpl ) { this.selected = $( widgetTpl ); this.selected.siblings( '.widget-tpl' ).removeClass( 'selected' ); this.selected.addClass( 'selected' ); }, /* * Highlights a widget on focus. / focus: function( event ) { this.select( $( event.currentTarget ) ); }, /* * Handles submit for keypress and click on widget. / _submit: function( event ) { // Only proceed with keypress if it is Enter or Spacebar. if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) { return; } this.submit( $( event.currentTarget ) ); }, /* * Adds a selected widget to the sidebar. / submit: function( widgetTpl ) { var widgetId, widget, widgetFormControl; if ( ! widgetTpl ) { widgetTpl = this.selected; } if ( ! widgetTpl \|\| ! this.currentSidebarControl ) { return; } this.select( widgetTpl ); widgetId = $( this.selected ).data( 'widget-id' ); widget = this.collection.findWhere( { id: widgetId } ); if ( ! widget ) { return; } widgetFormControl = this.currentSidebarControl.addWidget( widget.get( 'id_base' ) ); if ( widgetFormControl ) { widgetFormControl.focus(); } this.close(); }, /* * Opens the panel. / open: function( sidebarControl ) { this.currentSidebarControl = sidebarControl; // Wide widget controls appear over the preview, and so they need to be collapsed when the panel opens. _( this.currentSidebarControl.getWidgetFormControls() ).each( function( control ) { if ( control.params.is_wide ) { control.collapseForm(); } } ); if ( api.section.has( 'publish_settings' ) ) { api.section( 'publish_settings' ).collapse(); } $( 'body' ).addClass( 'adding-widget' ); this.$el.find( '.selected' ).removeClass( 'selected' ); // Reset search. this.collection.doSearch( '' ); if ( ! api.settings.browser.mobile ) { this.$search.trigger( 'focus' ); } }, /* * Closes the panel. / close: function( options ) { options = options \|\| {}; if ( options.returnFocus && this.currentSidebarControl ) { this.currentSidebarControl.container.find( '.add-new-widget' ).focus(); } this.currentSidebarControl = null; this.selected = null; $( 'body' ).removeClass( 'adding-widget' ); this.$search.val( '' ).trigger( 'input' ); }, /* * Adds keyboard accessiblity to the panel. / keyboardAccessible: function( event ) { var isEnter = ( event.which === 13 ), isEsc = ( event.which === 27 ), isDown = ( event.which === 40 ), isUp = ( event.which === 38 ), isTab = ( event.which === 9 ), isShift = ( event.shiftKey ), selected = null, firstVisible = this.$el.find( '> .widget-tpl:visible:first' ), lastVisible = this.$el.find( '> .widget-tpl:visible:last' ), isSearchFocused = $( event.target ).is( this.$search ), isLastWidgetFocused = $( event.target ).is( '.widget-tpl:visible:last' ); if ( isDown \|\| isUp ) { if ( isDown ) { if ( isSearchFocused ) { selected = firstVisible; } else if ( this.selected && this.selected.nextAll( '.widget-tpl:visible' ).length !== 0 ) { selected = this.selected.nextAll( '.widget-tpl:visible:first' ); } } else if ( isUp ) { if ( isSearchFocused ) { selected = lastVisible; } else if ( this.selected && this.selected.prevAll( '.widget-tpl:visible' ).length !== 0 ) { selected = this.selected.prevAll( '.widget-tpl:visible:first' ); } } this.select( selected ); if ( selected ) { selected.trigger( 'focus' ); } else { this.$search.trigger( 'focus' ); } return; } // If enter pressed but nothing entered, don't do anything. if ( isEnter && ! this.$search.val() ) { return; } if ( isEnter ) { this.submit(); } else if ( isEsc ) { this.close( { returnFocus: true } ); } if ( this.currentSidebarControl && isTab && ( isShift && isSearchFocused \|\| ! isShift && isLastWidgetFocused ) ) { this.currentSidebarControl.container.find( '.add-new-widget' ).focus(); event.preventDefault(); } } }); /* * Handlers for the widget-synced event, organized by widget ID base. * Other widgets may provide their own update handlers by adding * listeners for the widget-synced event. * * @alias wp.customize.Widgets.formSyncHandlers / api.Widgets.formSyncHandlers = { /* * @param {jQuery.Event} e * @param {jQuery} widget * @param {string} newForm / rss: function( e, widget, newForm ) { var oldWidgetError = widget.find( '.widget-error:first' ), newWidgetError = $( '<div>' + newForm + '</div>' ).find( '.widget-error:first' ); if ( oldWidgetError.length && newWidgetError.length ) { oldWidgetError.replaceWith( newWidgetError ); } else if ( oldWidgetError.length ) { oldWidgetError.remove(); } else if ( newWidgetError.length ) { widget.find( '.widget-content:first' ).prepend( newWidgetError ); } } }; api.Widgets.WidgetControl = api.Control.extend(/* @lends wp.customize.Widgets.WidgetControl.prototype /{ defaultExpandedArguments: { duration: 'fast', completeCallback: $.noop }, /* * wp.customize.Widgets.WidgetControl * * Customizer control for widgets. * Note that 'widget_form' must match the WP_Widget_Form_Customize_Control::$type * * @since 4.1.0 * * @constructs wp.customize.Widgets.WidgetControl * @augments wp.customize.Control / initialize: function( id, options ) { var control = this; control.widgetControlEmbedded = false; control.widgetContentEmbedded = false; control.expanded = new api.Value( false ); control.expandedArgumentsQueue = []; control.expanded.bind( function( expanded ) { var args = control.expandedArgumentsQueue.shift(); args = $.extend( {}, control.defaultExpandedArguments, args ); control.onChangeExpanded( expanded, args ); }); control.altNotice = true; api.Control.prototype.initialize.call( control, id, options ); }, /* * Set up the control. * * @since 3.9.0 / ready: function() { var control = this; / * Embed a placeholder once the section is expanded. The full widget * form content will be embedded once the control itself is expanded, * and at this point the widget-added event will be triggered. / if ( ! control.section() ) { control.embedWidgetControl(); } else { api.section( control.section(), function( section ) { var onExpanded = function( isExpanded ) { if ( isExpanded ) { control.embedWidgetControl(); section.expanded.unbind( onExpanded ); } }; if ( section.expanded() ) { onExpanded( true ); } else { section.expanded.bind( onExpanded ); } } ); } }, /* * Embed the .widget element inside the li container. * * @since 4.4.0 / embedWidgetControl: function() { var control = this, widgetControl; if ( control.widgetControlEmbedded ) { return; } control.widgetControlEmbedded = true; widgetControl = $( control.params.widget_control ); control.container.append( widgetControl ); control._setupModel(); control._setupWideWidget(); control._setupControlToggle(); control._setupWidgetTitle(); control._setupReorderUI(); control._setupHighlightEffects(); control._setupUpdateUI(); control._setupRemoveUI(); }, /* * Embed the actual widget form inside of .widget-content and finally trigger the widget-added event. * * @since 4.4.0 / embedWidgetContent: function() { var control = this, widgetContent; control.embedWidgetControl(); if ( control.widgetContentEmbedded ) { return; } control.widgetContentEmbedded = true; // Update the notification container element now that the widget content has been embedded. control.notifications.container = control.getNotificationsContainerElement(); control.notifications.render(); widgetContent = $( control.params.widget_content ); control.container.find( '.widget-content:first' ).append( widgetContent ); / * Trigger widget-added event so that plugins can attach any event * listeners and dynamic UI elements. / $( document ).trigger( 'widget-added', [ control.container.find( '.widget:first' ) ] ); }, /* * Handle changes to the setting / _setupModel: function() { var self = this, rememberSavedWidgetId; // Remember saved widgets so we know which to trash (move to inactive widgets sidebar). rememberSavedWidgetId = function() { api.Widgets.savedWidgetIds[self.params.widget_id] = true; }; api.bind( 'ready', rememberSavedWidgetId ); api.bind( 'saved', rememberSavedWidgetId ); this._updateCount = 0; this.isWidgetUpdating = false; this.liveUpdateMode = true; // Update widget whenever model changes. this.setting.bind( function( to, from ) { if ( ! _( from ).isEqual( to ) && ! self.isWidgetUpdating ) { self.updateWidget( { instance: to } ); } } ); }, /* * Add special behaviors for wide widget controls / _setupWideWidget: function() { var self = this, $widgetInside, $widgetForm, $customizeSidebar, $themeControlsContainer, positionWidget; if ( ! this.params.is_wide \|\| $( window ).width() <= 640 / max-width breakpoint in customize-controls.css / ) { return; } $widgetInside = this.container.find( '.widget-inside' ); $widgetForm = $widgetInside.find( '> .form' ); $customizeSidebar = $( '.wp-full-overlay-sidebar-content:first' ); this.container.addClass( 'wide-widget-control' ); this.container.find( '.form:first' ).css( { 'max-width': this.params.width, 'min-height': this.params.height } ); /* * Keep the widget-inside positioned so the top of fixed-positioned * element is at the same top position as the widget-top. When the * widget-top is scrolled out of view, keep the widget-top in view; * likewise, don't allow the widget to drop off the bottom of the window. * If a widget is too tall to fit in the window, don't let the height * exceed the window height so that the contents of the widget control * will become scrollable (overflow:auto). / positionWidget = function() { var offsetTop = self.container.offset().top, windowHeight = $( window ).height(), formHeight = $widgetForm.outerHeight(), top; $widgetInside.css( 'max-height', windowHeight ); top = Math.max( 0, // Prevent top from going off screen. Math.min( Math.max( offsetTop, 0 ), // Distance widget in panel is from top of screen. windowHeight - formHeight // Flush up against bottom of screen. ) ); $widgetInside.css( 'top', top ); }; $themeControlsContainer = $( '#customize-theme-controls' ); this.container.on( 'expand', function() { positionWidget(); $customizeSidebar.on( 'scroll', positionWidget ); $( window ).on( 'resize', positionWidget ); $themeControlsContainer.on( 'expanded collapsed', positionWidget ); } ); this.container.on( 'collapsed', function() { $customizeSidebar.off( 'scroll', positionWidget ); $( window ).off( 'resize', positionWidget ); $themeControlsContainer.off( 'expanded collapsed', positionWidget ); } ); // Reposition whenever a sidebar's widgets are changed. api.each( function( setting ) { if ( 0 === setting.id.indexOf( 'sidebars_widgets[' ) ) { setting.bind( function() { if ( self.container.hasClass( 'expanded' ) ) { positionWidget(); } } ); } } ); }, /* * Show/hide the control when clicking on the form title, when clicking * the close button / _setupControlToggle: function() { var self = this, $closeBtn; this.container.find( '.widget-top' ).on( 'click', function( e ) { e.preventDefault(); var sidebarWidgetsControl = self.getSidebarWidgetsControl(); if ( sidebarWidgetsControl.isReordering ) { return; } self.expanded( ! self.expanded() ); } ); $closeBtn = this.container.find( '.widget-control-close' ); $closeBtn.on( 'click', function() { self.collapse(); self.container.find( '.widget-top .widget-action:first' ).focus(); // Keyboard accessibility. } ); }, /* * Update the title of the form if a title field is entered / _setupWidgetTitle: function() { var self = this, updateTitle; updateTitle = function() { var title = self.setting().title, inWidgetTitle = self.container.find( '.in-widget-title' ); if ( title ) { inWidgetTitle.text( ': ' + title ); } else { inWidgetTitle.text( '' ); } }; this.setting.bind( updateTitle ); updateTitle(); }, /* * Set up the widget-reorder-nav / _setupReorderUI: function() { var self = this, selectSidebarItem, $moveWidgetArea, $reorderNav, updateAvailableSidebars, template; /* * select the provided sidebar list item in the move widget area * * @param {jQuery} li / selectSidebarItem = function( li ) { li.siblings( '.selected' ).removeClass( 'selected' ); li.addClass( 'selected' ); var isSelfSidebar = ( li.data( 'id' ) === self.params.sidebar_id ); self.container.find( '.move-widget-btn' ).prop( 'disabled', isSelfSidebar ); }; /* * Add the widget reordering elements to the widget control / this.container.find( '.widget-title-action' ).after( $( api.Widgets.data.tpl.widgetReorderNav ) ); template = _.template( api.Widgets.data.tpl.moveWidgetArea ); $moveWidgetArea = $( template( { sidebars: _( api.Widgets.registeredSidebars.toArray() ).pluck( 'attributes' ) } ) ); this.container.find( '.widget-top' ).after( $moveWidgetArea ); /* * Update available sidebars when their rendered state changes / updateAvailableSidebars = function() { var $sidebarItems = $moveWidgetArea.find( 'li' ), selfSidebarItem, renderedSidebarCount = 0; selfSidebarItem = $sidebarItems.filter( function(){ return $( this ).data( 'id' ) === self.params.sidebar_id; } ); $sidebarItems.each( function() { var li = $( this ), sidebarId, sidebar, sidebarIsRendered; sidebarId = li.data( 'id' ); sidebar = api.Widgets.registeredSidebars.get( sidebarId ); sidebarIsRendered = sidebar.get( 'is_rendered' ); li.toggle( sidebarIsRendered ); if ( sidebarIsRendered ) { renderedSidebarCount += 1; } if ( li.hasClass( 'selected' ) && ! sidebarIsRendered ) { selectSidebarItem( selfSidebarItem ); } } ); if ( renderedSidebarCount > 1 ) { self.container.find( '.move-widget' ).show(); } else { self.container.find( '.move-widget' ).hide(); } }; updateAvailableSidebars(); api.Widgets.registeredSidebars.on( 'change:is_rendered', updateAvailableSidebars ); /* * Handle clicks for up/down/move on the reorder nav / $reorderNav = this.container.find( '.widget-reorder-nav' ); $reorderNav.find( '.move-widget, .move-widget-down, .move-widget-up' ).each( function() { $( this ).prepend( self.container.find( '.widget-title' ).text() + ': ' ); } ).on( 'click keypress', function( event ) { if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) { return; } $( this ).trigger( 'focus' ); if ( $( this ).is( '.move-widget' ) ) { self.toggleWidgetMoveArea(); } else { var isMoveDown = $( this ).is( '.move-widget-down' ), isMoveUp = $( this ).is( '.move-widget-up' ), i = self.getWidgetSidebarPosition(); if ( ( isMoveUp && i === 0 ) \|\| ( isMoveDown && i === self.getSidebarWidgetsControl().setting().length - 1 ) ) { return; } if ( isMoveUp ) { self.moveUp(); wp.a11y.speak( l10n.widgetMovedUp ); } else { self.moveDown(); wp.a11y.speak( l10n.widgetMovedDown ); } $( this ).trigger( 'focus' ); // Re-focus after the container was moved. } } ); /* * Handle selecting a sidebar to move to / this.container.find( '.widget-area-select' ).on( 'click keypress', 'li', function( event ) { if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) { return; } event.preventDefault(); selectSidebarItem( $( this ) ); } ); /* * Move widget to another sidebar / this.container.find( '.move-widget-btn' ).click( function() { self.getSidebarWidgetsControl().toggleReordering( false ); var oldSidebarId = self.params.sidebar_id, newSidebarId = self.container.find( '.widget-area-select li.selected' ).data( 'id' ), oldSidebarWidgetsSetting, newSidebarWidgetsSetting, oldSidebarWidgetIds, newSidebarWidgetIds, i; oldSidebarWidgetsSetting = api( 'sidebars_widgets[' + oldSidebarId + ']' ); newSidebarWidgetsSetting = api( 'sidebars_widgets[' + newSidebarId + ']' ); oldSidebarWidgetIds = Array.prototype.slice.call( oldSidebarWidgetsSetting() ); newSidebarWidgetIds = Array.prototype.slice.call( newSidebarWidgetsSetting() ); i = self.getWidgetSidebarPosition(); oldSidebarWidgetIds.splice( i, 1 ); newSidebarWidgetIds.push( self.params.widget_id ); oldSidebarWidgetsSetting( oldSidebarWidgetIds ); newSidebarWidgetsSetting( newSidebarWidgetIds ); self.focus(); } ); }, /* * Highlight widgets in preview when interacted with in the Customizer / _setupHighlightEffects: function() { var self = this; // Highlight whenever hovering or clicking over the form. this.container.on( 'mouseenter click', function() { self.setting.previewer.send( 'highlight-widget', self.params.widget_id ); } ); // Highlight when the setting is updated. this.setting.bind( function() { self.setting.previewer.send( 'highlight-widget', self.params.widget_id ); } ); }, /* * Set up event handlers for widget updating / _setupUpdateUI: function() { var self = this, $widgetRoot, $widgetContent, $saveBtn, updateWidgetDebounced, formSyncHandler; $widgetRoot = this.container.find( '.widget:first' ); $widgetContent = $widgetRoot.find( '.widget-content:first' ); // Configure update button. $saveBtn = this.container.find( '.widget-control-save' ); $saveBtn.val( l10n.saveBtnLabel ); $saveBtn.attr( 'title', l10n.saveBtnTooltip ); $saveBtn.removeClass( 'button-primary' ); $saveBtn.on( 'click', function( e ) { e.preventDefault(); self.updateWidget( { disable_form: true } ); // @todo disable_form is unused? } ); updateWidgetDebounced = _.debounce( function() { self.updateWidget(); }, 250 ); // Trigger widget form update when hitting Enter within an input. $widgetContent.on( 'keydown', 'input', function( e ) { if ( 13 === e.which ) { // Enter. e.preventDefault(); self.updateWidget( { ignoreActiveElement: true } ); } } ); // Handle widgets that support live previews. $widgetContent.on( 'change input propertychange', ':input', function( e ) { if ( ! self.liveUpdateMode ) { return; } if ( e.type === 'change' \|\| ( this.checkValidity && this.checkValidity() ) ) { updateWidgetDebounced(); } } ); // Remove loading indicators when the setting is saved and the preview updates. this.setting.previewer.channel.bind( 'synced', function() { self.container.removeClass( 'previewer-loading' ); } ); api.previewer.bind( 'widget-updated', function( updatedWidgetId ) { if ( updatedWidgetId === self.params.widget_id ) { self.container.removeClass( 'previewer-loading' ); } } ); formSyncHandler = api.Widgets.formSyncHandlers[ this.params.widget_id_base ]; if ( formSyncHandler ) { $( document ).on( 'widget-synced', function( e, widget ) { if ( $widgetRoot.is( widget ) ) { formSyncHandler.apply( document, arguments ); } } ); } }, /* * Update widget control to indicate whether it is currently rendered. * * Overrides api.Control.toggle() * * @since 4.1.0 * * @param {boolean} active * @param {Object} args * @param {function} args.completeCallback / onChangeActive: function ( active, args ) { // Note: there is a second 'args' parameter being passed, merged on top of this.defaultActiveArguments. this.container.toggleClass( 'widget-rendered', active ); if ( args.completeCallback ) { args.completeCallback(); } }, /* * Set up event handlers for widget removal / _setupRemoveUI: function() { var self = this, $removeBtn, replaceDeleteWithRemove; // Configure remove button. $removeBtn = this.container.find( '.widget-control-remove' ); $removeBtn.on( 'click', function() { // Find an adjacent element to add focus to when this widget goes away. var $adjacentFocusTarget; if ( self.container.next().is( '.customize-control-widget_form' ) ) { $adjacentFocusTarget = self.container.next().find( '.widget-action:first' ); } else if ( self.container.prev().is( '.customize-control-widget_form' ) ) { $adjacentFocusTarget = self.container.prev().find( '.widget-action:first' ); } else { $adjacentFocusTarget = self.container.next( '.customize-control-sidebar_widgets' ).find( '.add-new-widget:first' ); } self.container.slideUp( function() { var sidebarsWidgetsControl = api.Widgets.getSidebarWidgetControlContainingWidget( self.params.widget_id ), sidebarWidgetIds, i; if ( ! sidebarsWidgetsControl ) { return; } sidebarWidgetIds = sidebarsWidgetsControl.setting().slice(); i = _.indexOf( sidebarWidgetIds, self.params.widget_id ); if ( -1 === i ) { return; } sidebarWidgetIds.splice( i, 1 ); sidebarsWidgetsControl.setting( sidebarWidgetIds ); $adjacentFocusTarget.focus(); // Keyboard accessibility. } ); } ); replaceDeleteWithRemove = function() { $removeBtn.text( l10n.removeBtnLabel ); // wp_widget_control() outputs the button as "Delete". $removeBtn.attr( 'title', l10n.removeBtnTooltip ); }; if ( this.params.is_new ) { api.bind( 'saved', replaceDeleteWithRemove ); } else { replaceDeleteWithRemove(); } }, /* * Find all inputs in a widget container that should be considered when * comparing the loaded form with the sanitized form, whose fields will * be aligned to copy the sanitized over. The elements returned by this * are passed into this._getInputsSignature(), and they are iterated * over when copying sanitized values over to the form loaded. * * @param {jQuery} container element in which to look for inputs * @return {jQuery} inputs * @private / _getInputs: function( container ) { return $( container ).find( ':input[name]' ); }, /* * Iterate over supplied inputs and create a signature string for all of them together. * This string can be used to compare whether or not the form has all of the same fields. * * @param {jQuery} inputs * @return {string} * @private / _getInputsSignature: function( inputs ) { var inputsSignatures = _( inputs ).map( function( input ) { var $input = $( input ), signatureParts; if ( $input.is( ':checkbox, :radio' ) ) { signatureParts = [ $input.attr( 'id' ), $input.attr( 'name' ), $input.prop( 'value' ) ]; } else { signatureParts = [ $input.attr( 'id' ), $input.attr( 'name' ) ]; } return signatureParts.join( ',' ); } ); return inputsSignatures.join( ';' ); }, /* * Get the state for an input depending on its type. * * @param {jQuery\|Element} input * @return {string\|boolean\|Array\|} @private / _getInputState: function( input ) { input = $( input ); if ( input.is( ':radio, :checkbox' ) ) { return input.prop( 'checked' ); } else if ( input.is( 'select[multiple]' ) ) { return input.find( 'option:selected' ).map( function () { return $( this ).val(); } ).get(); } else { return input.val(); } }, /* * Update an input's state based on its type. * * @param {jQuery\|Element} input * @param {string\|boolean\|Array\|} state @private / _setInputState: function ( input, state ) { input = $( input ); if ( input.is( ':radio, :checkbox' ) ) { input.prop( 'checked', state ); } else if ( input.is( 'select[multiple]' ) ) { if ( ! Array.isArray( state ) ) { state = []; } else { // Make sure all state items are strings since the DOM value is a string. state = _.map( state, function ( value ) { return String( value ); } ); } input.find( 'option' ).each( function () { $( this ).prop( 'selected', -1 !== _.indexOf( state, String( this.value ) ) ); } ); } else { input.val( state ); } }, /********************************************************************** * Begin public API methods ********************************************************************/ / * @return {wp.customize.controlConstructor.sidebar_widgets[]} / getSidebarWidgetsControl: function() { var settingId, sidebarWidgetsControl; settingId = 'sidebars_widgets[' + this.params.sidebar_id + ']'; sidebarWidgetsControl = api.control( settingId ); if ( ! sidebarWidgetsControl ) { return; } return sidebarWidgetsControl; }, /* * Submit the widget form via Ajax and get back the updated instance, * along with the new widget control form to render. * * @param {Object} [args] * @param {Object\|null} [args.instance=null] When the model changes, the instance is sent here; otherwise, the inputs from the form are used * @param {Function\|null} [args.complete=null] Function which is called when the request finishes. Context is bound to the control. First argument is any error. Following arguments are for success. * @param {boolean} [args.ignoreActiveElement=false] Whether or not updating a field will be deferred if focus is still on the element. / updateWidget: function( args ) { var self = this, instanceOverride, completeCallback, $widgetRoot, $widgetContent, updateNumber, params, data, $inputs, processing, jqxhr, isChanged; // The updateWidget logic requires that the form fields to be fully present. self.embedWidgetContent(); args = $.extend( { instance: null, complete: null, ignoreActiveElement: false }, args ); instanceOverride = args.instance; completeCallback = args.complete; this._updateCount += 1; updateNumber = this._updateCount; $widgetRoot = this.container.find( '.widget:first' ); $widgetContent = $widgetRoot.find( '.widget-content:first' ); // Remove a previous error message. $widgetContent.find( '.widget-error' ).remove(); this.container.addClass( 'widget-form-loading' ); this.container.addClass( 'previewer-loading' ); processing = api.state( 'processing' ); processing( processing() + 1 ); if ( ! this.liveUpdateMode ) { this.container.addClass( 'widget-form-disabled' ); } params = {}; params.action = 'update-widget'; params.wp_customize = 'on'; params.nonce = api.settings.nonce['update-widget']; params.customize_theme = api.settings.theme.stylesheet; params.customized = wp.customize.previewer.query().customized; data = $.param( params ); $inputs = this._getInputs( $widgetContent ); / * Store the value we're submitting in data so that when the response comes back, * we know if it got sanitized; if there is no difference in the sanitized value, * then we do not need to touch the UI and mess up the user's ongoing editing. / $inputs.each( function() { $( this ).data( 'state' + updateNumber, self._getInputState( this ) ); } ); if ( instanceOverride ) { data += '&' + $.param( { 'sanitized_widget_setting': JSON.stringify( instanceOverride ) } ); } else { data += '&' + $inputs.serialize(); } data += '&' + $widgetContent.find( '~ :input' ).serialize(); if ( this._previousUpdateRequest ) { this._previousUpdateRequest.abort(); } jqxhr = $.post( wp.ajax.settings.url, data ); this._previousUpdateRequest = jqxhr; jqxhr.done( function( r ) { var message, sanitizedForm, $sanitizedInputs, hasSameInputsInResponse, isLiveUpdateAborted = false; // Check if the user is logged out. if ( '0' === r ) { api.previewer.preview.iframe.hide(); api.previewer.login().done( function() { self.updateWidget( args ); api.previewer.preview.iframe.show(); } ); return; } // Check for cheaters. if ( '-1' === r ) { api.previewer.cheatin(); return; } if ( r.success ) { sanitizedForm = $( '<div>' + r.data.form + '</div>' ); $sanitizedInputs = self._getInputs( sanitizedForm ); hasSameInputsInResponse = self._getInputsSignature( $inputs ) === self._getInputsSignature( $sanitizedInputs ); // Restore live update mode if sanitized fields are now aligned with the existing fields. if ( hasSameInputsInResponse && ! self.liveUpdateMode ) { self.liveUpdateMode = true; self.container.removeClass( 'widget-form-disabled' ); self.container.find( 'input[name="savewidget"]' ).hide(); } // Sync sanitized field states to existing fields if they are aligned. if ( hasSameInputsInResponse && self.liveUpdateMode ) { $inputs.each( function( i ) { var $input = $( this ), $sanitizedInput = $( $sanitizedInputs[i] ), submittedState, sanitizedState, canUpdateState; submittedState = $input.data( 'state' + updateNumber ); sanitizedState = self._getInputState( $sanitizedInput ); $input.data( 'sanitized', sanitizedState ); canUpdateState = ( ! _.isEqual( submittedState, sanitizedState ) && ( args.ignoreActiveElement \|\| ! $input.is( document.activeElement ) ) ); if ( canUpdateState ) { self._setInputState( $input, sanitizedState ); } } ); $( document ).trigger( 'widget-synced', [ $widgetRoot, r.data.form ] ); // Otherwise, if sanitized fields are not aligned with existing fields, disable live update mode if enabled. } else if ( self.liveUpdateMode ) { self.liveUpdateMode = false; self.container.find( 'input[name="savewidget"]' ).show(); isLiveUpdateAborted = true; // Otherwise, replace existing form with the sanitized form. } else { $widgetContent.html( r.data.form ); self.container.removeClass( 'widget-form-disabled' ); $( document ).trigger( 'widget-updated', [ $widgetRoot ] ); } /* * If the old instance is identical to the new one, there is nothing new * needing to be rendered, and so we can preempt the event for the * preview finishing loading. / isChanged = ! isLiveUpdateAborted && ! _( self.setting() ).isEqual( r.data.instance ); if ( isChanged ) { self.isWidgetUpdating = true; // Suppress triggering another updateWidget. self.setting( r.data.instance ); self.isWidgetUpdating = false; } else { // No change was made, so stop the spinner now instead of when the preview would updates. self.container.removeClass( 'previewer-loading' ); } if ( completeCallback ) { completeCallback.call( self, null, { noChange: ! isChanged, ajaxFinished: true } ); } } else { // General error message. message = l10n.error; if ( r.data && r.data.message ) { message = r.data.message; } if ( completeCallback ) { completeCallback.call( self, message ); } else { $widgetContent.prepend( '<p class="widget-error"><strong>' + message + '</strong></p>' ); } } } ); jqxhr.fail( function( jqXHR, textStatus ) { if ( completeCallback ) { completeCallback.call( self, textStatus ); } } ); jqxhr.always( function() { self.container.removeClass( 'widget-form-loading' ); $inputs.each( function() { $( this ).removeData( 'state' + updateNumber ); } ); processing( processing() - 1 ); } ); }, /* * Expand the accordion section containing a control / expandControlSection: function() { api.Control.prototype.expand.call( this ); }, /* * @since 4.1.0 * * @param {Boolean} expanded * @param {Object} [params] * @return {Boolean} False if state already applied. / _toggleExpanded: api.Section.prototype._toggleExpanded, /* * @since 4.1.0 * * @param {Object} [params] * @return {Boolean} False if already expanded. / expand: api.Section.prototype.expand, /* * Expand the widget form control * * @deprecated 4.1.0 Use this.expand() instead. / expandForm: function() { this.expand(); }, /* * @since 4.1.0 * * @param {Object} [params] * @return {Boolean} False if already collapsed. / collapse: api.Section.prototype.collapse, /* * Collapse the widget form control * * @deprecated 4.1.0 Use this.collapse() instead. / collapseForm: function() { this.collapse(); }, /* * Expand or collapse the widget control * * @deprecated this is poor naming, and it is better to directly set control.expanded( showOrHide ) * * @param {boolean\|undefined} [showOrHide] If not supplied, will be inverse of current visibility / toggleForm: function( showOrHide ) { if ( typeof showOrHide === 'undefined' ) { showOrHide = ! this.expanded(); } this.expanded( showOrHide ); }, /* * Respond to change in the expanded state. * * @param {boolean} expanded * @param {Object} args merged on top of this.defaultActiveArguments / onChangeExpanded: function ( expanded, args ) { var self = this, $widget, $inside, complete, prevComplete, expandControl, $toggleBtn; self.embedWidgetControl(); // Make sure the outer form is embedded so that the expanded state can be set in the UI. if ( expanded ) { self.embedWidgetContent(); } // If the expanded state is unchanged only manipulate container expanded states. if ( args.unchanged ) { if ( expanded ) { api.Control.prototype.expand.call( self, { completeCallback: args.completeCallback }); } return; } $widget = this.container.find( 'div.widget:first' ); $inside = $widget.find( '.widget-inside:first' ); $toggleBtn = this.container.find( '.widget-top button.widget-action' ); expandControl = function() { // Close all other widget controls before expanding this one. api.control.each( function( otherControl ) { if ( self.params.type === otherControl.params.type && self !== otherControl ) { otherControl.collapse(); } } ); complete = function() { self.container.removeClass( 'expanding' ); self.container.addClass( 'expanded' ); $widget.addClass( 'open' ); $toggleBtn.attr( 'aria-expanded', 'true' ); self.container.trigger( 'expanded' ); }; if ( args.completeCallback ) { prevComplete = complete; complete = function () { prevComplete(); args.completeCallback(); }; } if ( self.params.is_wide ) { $inside.fadeIn( args.duration, complete ); } else { $inside.slideDown( args.duration, complete ); } self.container.trigger( 'expand' ); self.container.addClass( 'expanding' ); }; if ( $toggleBtn.attr( 'aria-expanded' ) === 'false' ) { if ( api.section.has( self.section() ) ) { api.section( self.section() ).expand( { completeCallback: expandControl } ); } else { expandControl(); } } else { complete = function() { self.container.removeClass( 'collapsing' ); self.container.removeClass( 'expanded' ); $widget.removeClass( 'open' ); $toggleBtn.attr( 'aria-expanded', 'false' ); self.container.trigger( 'collapsed' ); }; if ( args.completeCallback ) { prevComplete = complete; complete = function () { prevComplete(); args.completeCallback(); }; } self.container.trigger( 'collapse' ); self.container.addClass( 'collapsing' ); if ( self.params.is_wide ) { $inside.fadeOut( args.duration, complete ); } else { $inside.slideUp( args.duration, function() { $widget.css( { width:'', margin:'' } ); complete(); } ); } } }, /* * Get the position (index) of the widget in the containing sidebar * * @return {number} / getWidgetSidebarPosition: function() { var sidebarWidgetIds, position; sidebarWidgetIds = this.getSidebarWidgetsControl().setting(); position = _.indexOf( sidebarWidgetIds, this.params.widget_id ); if ( position === -1 ) { return; } return position; }, /* * Move widget up one in the sidebar / moveUp: function() { this._moveWidgetByOne( -1 ); }, /* * Move widget up one in the sidebar / moveDown: function() { this._moveWidgetByOne( 1 ); }, /* * @private * * @param {number} offset 1\|-1 / _moveWidgetByOne: function( offset ) { var i, sidebarWidgetsSetting, sidebarWidgetIds, adjacentWidgetId; i = this.getWidgetSidebarPosition(); sidebarWidgetsSetting = this.getSidebarWidgetsControl().setting; sidebarWidgetIds = Array.prototype.slice.call( sidebarWidgetsSetting() ); // Clone. adjacentWidgetId = sidebarWidgetIds[i + offset]; sidebarWidgetIds[i + offset] = this.params.widget_id; sidebarWidgetIds[i] = adjacentWidgetId; sidebarWidgetsSetting( sidebarWidgetIds ); }, /* * Toggle visibility of the widget move area * * @param {boolean} [showOrHide] / toggleWidgetMoveArea: function( showOrHide ) { var self = this, $moveWidgetArea; $moveWidgetArea = this.container.find( '.move-widget-area' ); if ( typeof showOrHide === 'undefined' ) { showOrHide = ! $moveWidgetArea.hasClass( 'active' ); } if ( showOrHide ) { // Reset the selected sidebar. $moveWidgetArea.find( '.selected' ).removeClass( 'selected' ); $moveWidgetArea.find( 'li' ).filter( function() { return $( this ).data( 'id' ) === self.params.sidebar_id; } ).addClass( 'selected' ); this.container.find( '.move-widget-btn' ).prop( 'disabled', true ); } $moveWidgetArea.toggleClass( 'active', showOrHide ); }, /* * Highlight the widget control and section / highlightSectionAndControl: function() { var $target; if ( this.container.is( ':hidden' ) ) { $target = this.container.closest( '.control-section' ); } else { $target = this.container; } $( '.highlighted' ).removeClass( 'highlighted' ); $target.addClass( 'highlighted' ); setTimeout( function() { $target.removeClass( 'highlighted' ); }, 500 ); } } ); /* * wp.customize.Widgets.WidgetsPanel * * Customizer panel containing the widget area sections. * * @since 4.4.0 * * @class wp.customize.Widgets.WidgetsPanel * @augments wp.customize.Panel / api.Widgets.WidgetsPanel = api.Panel.extend(/* @lends wp.customize.Widgets.WigetsPanel.prototype /{ /* * Add and manage the display of the no-rendered-areas notice. * * @since 4.4.0 / ready: function () { var panel = this; api.Panel.prototype.ready.call( panel ); panel.deferred.embedded.done(function() { var panelMetaContainer, noticeContainer, updateNotice, getActiveSectionCount, shouldShowNotice; panelMetaContainer = panel.container.find( '.panel-meta' ); // @todo This should use the Notifications API introduced to panels. See <https://core.trac.wordpress.org/ticket/38794>. noticeContainer = $( '<div></div>', { 'class': 'no-widget-areas-rendered-notice' }); panelMetaContainer.append( noticeContainer ); /* * Get the number of active sections in the panel. * * @return {number} Number of active sidebar sections. / getActiveSectionCount = function() { return _.filter( panel.sections(), function( section ) { return 'sidebar' === section.params.type && section.active(); } ).length; }; /* * Determine whether or not the notice should be displayed. * * @return {boolean} / shouldShowNotice = function() { var activeSectionCount = getActiveSectionCount(); if ( 0 === activeSectionCount ) { return true; } else { return activeSectionCount !== api.Widgets.data.registeredSidebars.length; } }; /* * Update the notice. * * @return {void} / updateNotice = function() { var activeSectionCount = getActiveSectionCount(), someRenderedMessage, nonRenderedAreaCount, registeredAreaCount; noticeContainer.empty(); registeredAreaCount = api.Widgets.data.registeredSidebars.length; if ( activeSectionCount !== registeredAreaCount ) { if ( 0 !== activeSectionCount ) { nonRenderedAreaCount = registeredAreaCount - activeSectionCount; someRenderedMessage = l10n.someAreasShown[ nonRenderedAreaCount ]; } else { someRenderedMessage = l10n.noAreasShown; } if ( someRenderedMessage ) { noticeContainer.append( $( '<p></p>', { text: someRenderedMessage } ) ); } noticeContainer.append( $( '<p></p>', { text: l10n.navigatePreview } ) ); } }; updateNotice(); / * Set the initial visibility state for rendered notice. * Update the visibility of the notice whenever a reflow happens. / noticeContainer.toggle( shouldShowNotice() ); api.previewer.deferred.active.done( function () { noticeContainer.toggle( shouldShowNotice() ); }); api.bind( 'pane-contents-reflowed', function() { var duration = ( 'resolved' === api.previewer.deferred.active.state() ) ? 'fast' : 0; updateNotice(); if ( shouldShowNotice() ) { noticeContainer.slideDown( duration ); } else { noticeContainer.slideUp( duration ); } }); }); }, /* * Allow an active widgets panel to be contextually active even when it has no active sections (widget areas). * * This ensures that the widgets panel appears even when there are no * sidebars displayed on the URL currently being previewed. * * @since 4.4.0 * * @return {boolean} / isContextuallyActive: function() { var panel = this; return panel.active(); } }); /* * wp.customize.Widgets.SidebarSection * * Customizer section representing a widget area widget * * @since 4.1.0 * * @class wp.customize.Widgets.SidebarSection * @augments wp.customize.Section / api.Widgets.SidebarSection = api.Section.extend(/* @lends wp.customize.Widgets.SidebarSection.prototype /{ /* * Sync the section's active state back to the Backbone model's is_rendered attribute * * @since 4.1.0 / ready: function () { var section = this, registeredSidebar; api.Section.prototype.ready.call( this ); registeredSidebar = api.Widgets.registeredSidebars.get( section.params.sidebarId ); section.active.bind( function ( active ) { registeredSidebar.set( 'is_rendered', active ); }); registeredSidebar.set( 'is_rendered', section.active() ); } }); /* * wp.customize.Widgets.SidebarControl * * Customizer control for widgets. * Note that 'sidebar_widgets' must match the WP_Widget_Area_Customize_Control::$type * * @since 3.9.0 * * @class wp.customize.Widgets.SidebarControl * @augments wp.customize.Control / api.Widgets.SidebarControl = api.Control.extend(/* @lends wp.customize.Widgets.SidebarControl.prototype /{ /* * Set up the control / ready: function() { this.$controlSection = this.container.closest( '.control-section' ); this.$sectionContent = this.container.closest( '.accordion-section-content' ); this._setupModel(); this._setupSortable(); this._setupAddition(); this._applyCardinalOrderClassNames(); }, /* * Update ordering of widget control forms when the setting is updated / _setupModel: function() { var self = this; this.setting.bind( function( newWidgetIds, oldWidgetIds ) { var widgetFormControls, removedWidgetIds, priority; removedWidgetIds = _( oldWidgetIds ).difference( newWidgetIds ); // Filter out any persistent widget IDs for widgets which have been deactivated. newWidgetIds = _( newWidgetIds ).filter( function( newWidgetId ) { var parsedWidgetId = parseWidgetId( newWidgetId ); return !! api.Widgets.availableWidgets.findWhere( { id_base: parsedWidgetId.id_base } ); } ); widgetFormControls = _( newWidgetIds ).map( function( widgetId ) { var widgetFormControl = api.Widgets.getWidgetFormControlForWidget( widgetId ); if ( ! widgetFormControl ) { widgetFormControl = self.addWidget( widgetId ); } return widgetFormControl; } ); // Sort widget controls to their new positions. widgetFormControls.sort( function( a, b ) { var aIndex = _.indexOf( newWidgetIds, a.params.widget_id ), bIndex = _.indexOf( newWidgetIds, b.params.widget_id ); return aIndex - bIndex; }); priority = 0; _( widgetFormControls ).each( function ( control ) { control.priority( priority ); control.section( self.section() ); priority += 1; }); self.priority( priority ); // Make sure sidebar control remains at end. // Re-sort widget form controls (including widgets form other sidebars newly moved here). self._applyCardinalOrderClassNames(); // If the widget was dragged into the sidebar, make sure the sidebar_id param is updated. _( widgetFormControls ).each( function( widgetFormControl ) { widgetFormControl.params.sidebar_id = self.params.sidebar_id; } ); // Cleanup after widget removal. _( removedWidgetIds ).each( function( removedWidgetId ) { // Using setTimeout so that when moving a widget to another sidebar, // the other sidebars_widgets settings get a chance to update. setTimeout( function() { var removedControl, wasDraggedToAnotherSidebar, inactiveWidgets, removedIdBase, widget, isPresentInAnotherSidebar = false; // Check if the widget is in another sidebar. api.each( function( otherSetting ) { if ( otherSetting.id === self.setting.id \|\| 0 !== otherSetting.id.indexOf( 'sidebars_widgets[' ) \|\| otherSetting.id === 'sidebars_widgets[wp_inactive_widgets]' ) { return; } var otherSidebarWidgets = otherSetting(), i; i = _.indexOf( otherSidebarWidgets, removedWidgetId ); if ( -1 !== i ) { isPresentInAnotherSidebar = true; } } ); // If the widget is present in another sidebar, abort! if ( isPresentInAnotherSidebar ) { return; } removedControl = api.Widgets.getWidgetFormControlForWidget( removedWidgetId ); // Detect if widget control was dragged to another sidebar. wasDraggedToAnotherSidebar = removedControl && $.contains( document, removedControl.container[0] ) && ! $.contains( self.$sectionContent[0], removedControl.container[0] ); // Delete any widget form controls for removed widgets. if ( removedControl && ! wasDraggedToAnotherSidebar ) { api.control.remove( removedControl.id ); removedControl.container.remove(); } // Move widget to inactive widgets sidebar (move it to Trash) if has been previously saved. // This prevents the inactive widgets sidebar from overflowing with throwaway widgets. if ( api.Widgets.savedWidgetIds[removedWidgetId] ) { inactiveWidgets = api.value( 'sidebars_widgets[wp_inactive_widgets]' )().slice(); inactiveWidgets.push( removedWidgetId ); api.value( 'sidebars_widgets[wp_inactive_widgets]' )( _( inactiveWidgets ).unique() ); } // Make old single widget available for adding again. removedIdBase = parseWidgetId( removedWidgetId ).id_base; widget = api.Widgets.availableWidgets.findWhere( { id_base: removedIdBase } ); if ( widget && ! widget.get( 'is_multi' ) ) { widget.set( 'is_disabled', false ); } } ); } ); } ); }, /* * Allow widgets in sidebar to be re-ordered, and for the order to be previewed / _setupSortable: function() { var self = this; this.isReordering = false; /* * Update widget order setting when controls are re-ordered / this.$sectionContent.sortable( { items: '> .customize-control-widget_form', handle: '.widget-top', axis: 'y', tolerance: 'pointer', connectWith: '.accordion-section-content:has(.customize-control-sidebar_widgets)', update: function() { var widgetContainerIds = self.$sectionContent.sortable( 'toArray' ), widgetIds; widgetIds = $.map( widgetContainerIds, function( widgetContainerId ) { return $( '#' + widgetContainerId ).find( ':input[name=widget-id]' ).val(); } ); self.setting( widgetIds ); } } ); /* * Expand other Customizer sidebar section when dragging a control widget over it, * allowing the control to be dropped into another section / this.$controlSection.find( '.accordion-section-title' ).droppable({ accept: '.customize-control-widget_form', over: function() { var section = api.section( self.section.get() ); section.expand({ allowMultiple: true, // Prevent the section being dragged from to be collapsed. completeCallback: function () { // @todo It is not clear when refreshPositions should be called on which sections, or if it is even needed. api.section.each( function ( otherSection ) { if ( otherSection.container.find( '.customize-control-sidebar_widgets' ).length ) { otherSection.container.find( '.accordion-section-content:first' ).sortable( 'refreshPositions' ); } } ); } }); } }); /* * Keyboard-accessible reordering / this.container.find( '.reorder-toggle' ).on( 'click', function() { self.toggleReordering( ! self.isReordering ); } ); }, /* * Set up UI for adding a new widget / _setupAddition: function() { var self = this; this.container.find( '.add-new-widget' ).on( 'click', function() { var addNewWidgetBtn = $( this ); if ( self.$sectionContent.hasClass( 'reordering' ) ) { return; } if ( ! $( 'body' ).hasClass( 'adding-widget' ) ) { addNewWidgetBtn.attr( 'aria-expanded', 'true' ); api.Widgets.availableWidgetsPanel.open( self ); } else { addNewWidgetBtn.attr( 'aria-expanded', 'false' ); api.Widgets.availableWidgetsPanel.close(); } } ); }, /* * Add classes to the widget_form controls to assist with styling / _applyCardinalOrderClassNames: function() { var widgetControls = []; _.each( this.setting(), function ( widgetId ) { var widgetControl = api.Widgets.getWidgetFormControlForWidget( widgetId ); if ( widgetControl ) { widgetControls.push( widgetControl ); } }); if ( 0 === widgetControls.length \|\| ( 1 === api.Widgets.registeredSidebars.length && widgetControls.length <= 1 ) ) { this.container.find( '.reorder-toggle' ).hide(); return; } else { this.container.find( '.reorder-toggle' ).show(); } $( widgetControls ).each( function () { $( this.container ) .removeClass( 'first-widget' ) .removeClass( 'last-widget' ) .find( '.move-widget-down, .move-widget-up' ).prop( 'tabIndex', 0 ); }); _.first( widgetControls ).container .addClass( 'first-widget' ) .find( '.move-widget-up' ).prop( 'tabIndex', -1 ); _.last( widgetControls ).container .addClass( 'last-widget' ) .find( '.move-widget-down' ).prop( 'tabIndex', -1 ); }, /********************************************************************** * Begin public API methods ********************************************************************/ / * Enable/disable the reordering UI * * @param {boolean} showOrHide to enable/disable reordering * * @todo We should have a reordering state instead and rename this to onChangeReordering / toggleReordering: function( showOrHide ) { var addNewWidgetBtn = this.$sectionContent.find( '.add-new-widget' ), reorderBtn = this.container.find( '.reorder-toggle' ), widgetsTitle = this.$sectionContent.find( '.widget-title' ); showOrHide = Boolean( showOrHide ); if ( showOrHide === this.$sectionContent.hasClass( 'reordering' ) ) { return; } this.isReordering = showOrHide; this.$sectionContent.toggleClass( 'reordering', showOrHide ); if ( showOrHide ) { _( this.getWidgetFormControls() ).each( function( formControl ) { formControl.collapse(); } ); addNewWidgetBtn.attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); reorderBtn.attr( 'aria-label', l10n.reorderLabelOff ); wp.a11y.speak( l10n.reorderModeOn ); // Hide widget titles while reordering: title is already in the reorder controls. widgetsTitle.attr( 'aria-hidden', 'true' ); } else { addNewWidgetBtn.removeAttr( 'tabindex aria-hidden' ); reorderBtn.attr( 'aria-label', l10n.reorderLabelOn ); wp.a11y.speak( l10n.reorderModeOff ); widgetsTitle.attr( 'aria-hidden', 'false' ); } }, /* * Get the widget_form Customize controls associated with the current sidebar. * * @since 3.9.0 * @return {wp.customize.controlConstructor.widget_form[]} / getWidgetFormControls: function() { var formControls = []; _( this.setting() ).each( function( widgetId ) { var settingId = widgetIdToSettingId( widgetId ), formControl = api.control( settingId ); if ( formControl ) { formControls.push( formControl ); } } ); return formControls; }, /* * @param {string} widgetId or an id_base for adding a previously non-existing widget. * @return {Object\|false} widget_form control instance, or false on error. / addWidget: function( widgetId ) { var self = this, controlHtml, $widget, controlType = 'widget_form', controlContainer, controlConstructor, parsedWidgetId = parseWidgetId( widgetId ), widgetNumber = parsedWidgetId.number, widgetIdBase = parsedWidgetId.id_base, widget = api.Widgets.availableWidgets.findWhere( {id_base: widgetIdBase} ), settingId, isExistingWidget, widgetFormControl, sidebarWidgets, settingArgs, setting; if ( ! widget ) { return false; } if ( widgetNumber && ! widget.get( 'is_multi' ) ) { return false; } // Set up new multi widget. if ( widget.get( 'is_multi' ) && ! widgetNumber ) { widget.set( 'multi_number', widget.get( 'multi_number' ) + 1 ); widgetNumber = widget.get( 'multi_number' ); } controlHtml = $( '#widget-tpl-' + widget.get( 'id' ) ).html().trim(); if ( widget.get( 'is_multi' ) ) { controlHtml = controlHtml.replace( /<[^<>]+>/g, function( m ) { return m.replace( /__i__\|%i%/g, widgetNumber ); } ); } else { widget.set( 'is_disabled', true ); // Prevent single widget from being added again now. } $widget = $( controlHtml ); controlContainer = $( '<li/>' ) .addClass( 'customize-control' ) .addClass( 'customize-control-' + controlType ) .append( $widget ); // Remove icon which is visible inside the panel. controlContainer.find( '> .widget-icon' ).remove(); if ( widget.get( 'is_multi' ) ) { controlContainer.find( 'input[name="widget_number"]' ).val( widgetNumber ); controlContainer.find( 'input[name="multi_number"]' ).val( widgetNumber ); } widgetId = controlContainer.find( '[name="widget-id"]' ).val(); controlContainer.hide(); // To be slid-down below. settingId = 'widget_' + widget.get( 'id_base' ); if ( widget.get( 'is_multi' ) ) { settingId += '[' + widgetNumber + ']'; } controlContainer.attr( 'id', 'customize-control-' + settingId.replace( /\]/g, '' ).replace( /\[/g, '-' ) ); // Only create setting if it doesn't already exist (if we're adding a pre-existing inactive widget). isExistingWidget = api.has( settingId ); if ( ! isExistingWidget ) { settingArgs = { transport: api.Widgets.data.selectiveRefreshableWidgets[ widget.get( 'id_base' ) ] ? 'postMessage' : 'refresh', previewer: this.setting.previewer }; setting = api.create( settingId, settingId, '', settingArgs ); setting.set( {} ); // Mark dirty, changing from '' to {}. } controlConstructor = api.controlConstructor[controlType]; widgetFormControl = new controlConstructor( settingId, { settings: { 'default': settingId }, content: controlContainer, sidebar_id: self.params.sidebar_id, widget_id: widgetId, widget_id_base: widget.get( 'id_base' ), type: controlType, is_new: ! isExistingWidget, width: widget.get( 'width' ), height: widget.get( 'height' ), is_wide: widget.get( 'is_wide' ) } ); api.control.add( widgetFormControl ); // Make sure widget is removed from the other sidebars. api.each( function( otherSetting ) { if ( otherSetting.id === self.setting.id ) { return; } if ( 0 !== otherSetting.id.indexOf( 'sidebars_widgets[' ) ) { return; } var otherSidebarWidgets = otherSetting().slice(), i = _.indexOf( otherSidebarWidgets, widgetId ); if ( -1 !== i ) { otherSidebarWidgets.splice( i ); otherSetting( otherSidebarWidgets ); } } ); // Add widget to this sidebar. sidebarWidgets = this.setting().slice(); if ( -1 === _.indexOf( sidebarWidgets, widgetId ) ) { sidebarWidgets.push( widgetId ); this.setting( sidebarWidgets ); } controlContainer.slideDown( function() { if ( isExistingWidget ) { widgetFormControl.updateWidget( { instance: widgetFormControl.setting() } ); } } ); return widgetFormControl; } } ); // Register models for custom panel, section, and control types. $.extend( api.panelConstructor, { widgets: api.Widgets.WidgetsPanel }); $.extend( api.sectionConstructor, { sidebar: api.Widgets.SidebarSection }); $.extend( api.controlConstructor, { widget_form: api.Widgets.WidgetControl, sidebar_widgets: api.Widgets.SidebarControl }); /* * Init Customizer for widgets. / api.bind( 'ready', function() { // Set up the widgets panel. api.Widgets.availableWidgetsPanel = new api.Widgets.AvailableWidgetsPanelView({ collection: api.Widgets.availableWidgets }); // Highlight widget control. api.previewer.bind( 'highlight-widget-control', api.Widgets.highlightWidgetFormControl ); // Open and focus widget control. api.previewer.bind( 'focus-widget-control', api.Widgets.focusWidgetFormControl ); } ); /* * Highlight a widget control. * * @param {string} widgetId / api.Widgets.highlightWidgetFormControl = function( widgetId ) { var control = api.Widgets.getWidgetFormControlForWidget( widgetId ); if ( control ) { control.highlightSectionAndControl(); } }, /* * Focus a widget control. * * @param {string} widgetId / api.Widgets.focusWidgetFormControl = function( widgetId ) { var control = api.Widgets.getWidgetFormControlForWidget( widgetId ); if ( control ) { control.focus(); } }, /* * Given a widget control, find the sidebar widgets control that contains it. * @param {string} widgetId * @return {Object\|null} / api.Widgets.getSidebarWidgetControlContainingWidget = function( widgetId ) { var foundControl = null; // @todo This can use widgetIdToSettingId(), then pass into wp.customize.control( x ).getSidebarWidgetsControl(). api.control.each( function( control ) { if ( control.params.type === 'sidebar_widgets' && -1 !== _.indexOf( control.setting(), widgetId ) ) { foundControl = control; } } ); return foundControl; }; /* * Given a widget ID for a widget appearing in the preview, get the widget form control associated with it. * * @param {string} widgetId * @return {Object\|null} / api.Widgets.getWidgetFormControlForWidget = function( widgetId ) { var foundControl = null; // @todo We can just use widgetIdToSettingId() here. api.control.each( function( control ) { if ( control.params.type === 'widget_form' && control.params.widget_id === widgetId ) { foundControl = control; } } ); return foundControl; }; /* * Initialize Edit Menu button in Nav Menu widget. / $( document ).on( 'widget-added', function( event, widgetContainer ) { var parsedWidgetId, widgetControl, navMenuSelect, editMenuButton; parsedWidgetId = parseWidgetId( widgetContainer.find( '> .widget-inside > .form > .widget-id' ).val() ); if ( 'nav_menu' !== parsedWidgetId.id_base ) { return; } widgetControl = api.control( 'widget_nav_menu[' + String( parsedWidgetId.number ) + ']' ); if ( ! widgetControl ) { return; } navMenuSelect = widgetContainer.find( 'select[name="nav_menu"]' ); editMenuButton = widgetContainer.find( '.edit-selected-nav-menu > button' ); if ( 0 === navMenuSelect.length \|\| 0 === editMenuButton.length ) { return; } navMenuSelect.on( 'change', function() { if ( api.section.has( 'nav_menu[' + navMenuSelect.val() + ']' ) ) { editMenuButton.parent().show(); } else { editMenuButton.parent().hide(); } }); editMenuButton.on( 'click', function() { var section = api.section( 'nav_menu[' + navMenuSelect.val() + ']' ); if ( section ) { focusConstructWithBreadcrumb( section, widgetControl ); } } ); } ); /** * Focus (expand) one construct and then focus on another construct after the first is collapsed. * * This overrides the back button to serve the purpose of breadcrumb navigation. * * @param {wp.customize.Section\|wp.customize.Panel\|wp.customize.Control} focusConstruct - The object to initially focus. * @param {wp.customize.Section\|wp.customize.Panel\|wp.customize.Control} returnConstruct - The object to return focus. / function focusConstructWithBreadcrumb( focusConstruct, returnConstruct ) { focusConstruct.focus(); function onceCollapsed( isExpanded ) { if ( ! isExpanded ) { focusConstruct.expanded.unbind( onceCollapsed ); returnConstruct.focus(); } } focusConstruct.expanded.bind( onceCollapsed ); } /* * @param {string} widgetId * @return {Object} / function parseWidgetId( widgetId ) { var matches, parsed = { number: null, id_base: null }; matches = widgetId.match( /^(.+)-(\d+)$/ ); if ( matches ) { parsed.id_base = matches[1]; parsed.number = parseInt( matches[2], 10 ); } else { // Likely an old single widget. parsed.id_base = widgetId; } return parsed; } /* * @param {string} widgetId * @return {string} settingId */ function widgetIdToSettingId( widgetId ) { var parsed = parseWidgetId( widgetId ), settingId; settingId = 'widget_' + parsed.id_base; if ( parsed.number ) { settingId += '[' + parsed.number + ']'; } return settingId; } })( window.wp, jQuery ); Back

Edit File : customize-widgets.js | Size : 70.02 KB

/**
 * @output wp-admin/js/customize-widgets.js
 */

/* global _wpCustomizeWidgetsSettings */
(function( wp, $ ){

if ( ! wp || ! wp.customize ) { return; }

// Set up our namespace...
	var api = wp.customize,
		l10n;

/**
	 * @namespace wp.customize.Widgets
	 */
	api.Widgets = api.Widgets || {};
	api.Widgets.savedWidgetIds = {};

// Link settings.
	api.Widgets.data = _wpCustomizeWidgetsSettings || {};
	l10n = api.Widgets.data.l10n;

/**
	 * wp.customize.Widgets.WidgetModel
	 *
	 * A single widget model.
	 *
	 * @class    wp.customize.Widgets.WidgetModel
	 * @augments Backbone.Model
	 */
	api.Widgets.WidgetModel = Backbone.Model.extend(/** @lends wp.customize.Widgets.WidgetModel.prototype */{
		id: null,
		temp_id: null,
		classname: null,
		control_tpl: null,
		description: null,
		is_disabled: null,
		is_multi: null,
		multi_number: null,
		name: null,
		id_base: null,
		transport: null,
		params: [],
		width: null,
		height: null,
		search_matched: true
	});

/**
	 * wp.customize.Widgets.WidgetCollection
	 *
	 * Collection for widget models.
	 *
	 * @class    wp.customize.Widgets.WidgetCollection
	 * @augments Backbone.Collection
	 */
	api.Widgets.WidgetCollection = Backbone.Collection.extend(/** @lends wp.customize.Widgets.WidgetCollection.prototype */{
		model: api.Widgets.WidgetModel,

// Controls searching on the current widget collection
		// and triggers an update event.
		doSearch: function( value ) {

// Don't do anything if we've already done this search.
			// Useful because the search handler fires multiple times per keystroke.
			if ( this.terms === value ) {
				return;
			}

// Updates terms with the value passed.
			this.terms = value;

// If we have terms, run a search...
			if ( this.terms.length > 0 ) {
				this.search( this.terms );
			}

// If search is blank, set all the widgets as they matched the search to reset the views.
			if ( this.terms === '' ) {
				this.each( function ( widget ) {
					widget.set( 'search_matched', true );
				} );
			}
		},

// Performs a search within the collection.
		// @uses RegExp
		search: function( term ) {
			var match, haystack;

// Escape the term string for RegExp meta characters.
			term = term.replace( /[-\/\\^$*+?.()|[\]{}]/g, '\\$&' );

// Consider spaces as word delimiters and match the whole string
			// so matching terms can be combined.
			term = term.replace( / /g, ')(?=.*' );
			match = new RegExp( '^(?=.*' + term + ').+', 'i' );

this.each( function ( data ) {
				haystack = [ data.get( 'name' ), data.get( 'description' ) ].join( ' ' );
				data.set( 'search_matched', match.test( haystack ) );
			} );
		}
	});
	api.Widgets.availableWidgets = new api.Widgets.WidgetCollection( api.Widgets.data.availableWidgets );

/**
	 * wp.customize.Widgets.SidebarModel
	 *
	 * A single sidebar model.
	 *
	 * @class    wp.customize.Widgets.SidebarModel
	 * @augments Backbone.Model
	 */
	api.Widgets.SidebarModel = Backbone.Model.extend(/** @lends wp.customize.Widgets.SidebarModel.prototype */{
		after_title: null,
		after_widget: null,
		before_title: null,
		before_widget: null,
		'class': null,
		description: null,
		id: null,
		name: null,
		is_rendered: false
	});

/**
	 * wp.customize.Widgets.SidebarCollection
	 *
	 * Collection for sidebar models.
	 *
	 * @class    wp.customize.Widgets.SidebarCollection
	 * @augments Backbone.Collection
	 */
	api.Widgets.SidebarCollection = Backbone.Collection.extend(/** @lends wp.customize.Widgets.SidebarCollection.prototype */{
		model: api.Widgets.SidebarModel
	});
	api.Widgets.registeredSidebars = new api.Widgets.SidebarCollection( api.Widgets.data.registeredSidebars );

api.Widgets.AvailableWidgetsPanelView = wp.Backbone.View.extend(/** @lends wp.customize.Widgets.AvailableWidgetsPanelView.prototype */{

el: '#available-widgets',

events: {
			'input #widgets-search': 'search',
			'focus .widget-tpl' : 'focus',
			'click .widget-tpl' : '_submit',
			'keypress .widget-tpl' : '_submit',
			'keydown' : 'keyboardAccessible'
		},

// Cache current selected widget.
		selected: null,

// Cache sidebar control which has opened panel.
		currentSidebarControl: null,
		$search: null,
		$clearResults: null,
		searchMatchesCount: null,

/**
		 * View class for the available widgets panel.
		 *
		 * @constructs wp.customize.Widgets.AvailableWidgetsPanelView
		 * @augments   wp.Backbone.View
		 */
		initialize: function() {
			var self = this;

this.$search = $( '#widgets-search' );

this.$clearResults = this.$el.find( '.clear-results' );

_.bindAll( this, 'close' );

this.listenTo( this.collection, 'change', this.updateList );

this.updateList();

// Set the initial search count to the number of available widgets.
			this.searchMatchesCount = this.collection.length;

/*
			 * If the available widgets panel is open and the customize controls
			 * are interacted with (i.e. available widgets panel is blurred) then
			 * close the available widgets panel. Also close on back button click.
			 */
			$( '#customize-controls, #available-widgets .customize-section-title' ).on( 'click keydown', function( e ) {
				var isAddNewBtn = $( e.target ).is( '.add-new-widget, .add-new-widget *' );
				if ( $( 'body' ).hasClass( 'adding-widget' ) && ! isAddNewBtn ) {
					self.close();
				}
			} );

// Clear the search results and trigger an `input` event to fire a new search.
			this.$clearResults.on( 'click', function() {
				self.$search.val( '' ).trigger( 'focus' ).trigger( 'input' );
			} );

// Close the panel if the URL in the preview changes.
			api.previewer.bind( 'url', this.close );
		},

/**
		 * Performs a search and handles selected widget.
		 */
		search: _.debounce( function( event ) {
			var firstVisible;

this.collection.doSearch( event.target.value );
			// Update the search matches count.
			this.updateSearchMatchesCount();
			// Announce how many search results.
			this.announceSearchMatches();

// Remove a widget from being selected if it is no longer visible.
			if ( this.selected && ! this.selected.is( ':visible' ) ) {
				this.selected.removeClass( 'selected' );
				this.selected = null;
			}

// If a widget was selected but the filter value has been cleared out, clear selection.
			if ( this.selected && ! event.target.value ) {
				this.selected.removeClass( 'selected' );
				this.selected = null;
			}

// If a filter has been entered and a widget hasn't been selected, select the first one shown.
			if ( ! this.selected && event.target.value ) {
				firstVisible = this.$el.find( '> .widget-tpl:visible:first' );
				if ( firstVisible.length ) {
					this.select( firstVisible );
				}
			}

// Toggle the clear search results button.
			if ( '' !== event.target.value ) {
				this.$clearResults.addClass( 'is-visible' );
			} else if ( '' === event.target.value ) {
				this.$clearResults.removeClass( 'is-visible' );
			}

// Set a CSS class on the search container when there are no search results.
			if ( ! this.searchMatchesCount ) {
				this.$el.addClass( 'no-widgets-found' );
			} else {
				this.$el.removeClass( 'no-widgets-found' );
			}
		}, 500 ),

/**
		 * Updates the count of the available widgets that have the `search_matched` attribute.
 		 */
		updateSearchMatchesCount: function() {
			this.searchMatchesCount = this.collection.where({ search_matched: true }).length;
		},

/**
		 * Sends a message to the aria-live region to announce how many search results.
		 */
		announceSearchMatches: function() {
			var message = l10n.widgetsFound.replace( '%d', this.searchMatchesCount ) ;

if ( ! this.searchMatchesCount ) {
				message = l10n.noWidgetsFound;
			}

wp.a11y.speak( message );
		},

/**
		 * Changes visibility of available widgets.
 		 */
		updateList: function() {
			this.collection.each( function( widget ) {
				var widgetTpl = $( '#widget-tpl-' + widget.id );
				widgetTpl.toggle( widget.get( 'search_matched' ) && ! widget.get( 'is_disabled' ) );
				if ( widget.get( 'is_disabled' ) && widgetTpl.is( this.selected ) ) {
					this.selected = null;
				}
			} );
		},

/**
		 * Highlights a widget.
 		 */
		select: function( widgetTpl ) {
			this.selected = $( widgetTpl );
			this.selected.siblings( '.widget-tpl' ).removeClass( 'selected' );
			this.selected.addClass( 'selected' );
		},

/**
		 * Highlights a widget on focus.
		 */
		focus: function( event ) {
			this.select( $( event.currentTarget ) );
		},

/**
		 * Handles submit for keypress and click on widget.
		 */
		_submit: function( event ) {
			// Only proceed with keypress if it is Enter or Spacebar.
			if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) {
				return;
			}

this.submit( $( event.currentTarget ) );
		},

/**
		 * Adds a selected widget to the sidebar.
 		 */
		submit: function( widgetTpl ) {
			var widgetId, widget, widgetFormControl;

if ( ! widgetTpl ) {
				widgetTpl = this.selected;
			}

if ( ! widgetTpl || ! this.currentSidebarControl ) {
				return;
			}

this.select( widgetTpl );

widgetId = $( this.selected ).data( 'widget-id' );
			widget = this.collection.findWhere( { id: widgetId } );
			if ( ! widget ) {
				return;
			}

widgetFormControl = this.currentSidebarControl.addWidget( widget.get( 'id_base' ) );
			if ( widgetFormControl ) {
				widgetFormControl.focus();
			}

this.close();
		},

/**
		 * Opens the panel.
		 */
		open: function( sidebarControl ) {
			this.currentSidebarControl = sidebarControl;

// Wide widget controls appear over the preview, and so they need to be collapsed when the panel opens.
			_( this.currentSidebarControl.getWidgetFormControls() ).each( function( control ) {
				if ( control.params.is_wide ) {
					control.collapseForm();
				}
			} );

if ( api.section.has( 'publish_settings' ) ) {
				api.section( 'publish_settings' ).collapse();
			}

$( 'body' ).addClass( 'adding-widget' );

this.$el.find( '.selected' ).removeClass( 'selected' );

// Reset search.
			this.collection.doSearch( '' );

if ( ! api.settings.browser.mobile ) {
				this.$search.trigger( 'focus' );
			}
		},

/**
		 * Closes the panel.
		 */
		close: function( options ) {
			options = options || {};

if ( options.returnFocus && this.currentSidebarControl ) {
				this.currentSidebarControl.container.find( '.add-new-widget' ).focus();
			}

this.currentSidebarControl = null;
			this.selected = null;

$( 'body' ).removeClass( 'adding-widget' );

this.$search.val( '' ).trigger( 'input' );
		},

/**
		 * Adds keyboard accessiblity to the panel.
		 */
		keyboardAccessible: function( event ) {
			var isEnter = ( event.which === 13 ),
				isEsc = ( event.which === 27 ),
				isDown = ( event.which === 40 ),
				isUp = ( event.which === 38 ),
				isTab = ( event.which === 9 ),
				isShift = ( event.shiftKey ),
				selected = null,
				firstVisible = this.$el.find( '> .widget-tpl:visible:first' ),
				lastVisible = this.$el.find( '> .widget-tpl:visible:last' ),
				isSearchFocused = $( event.target ).is( this.$search ),
				isLastWidgetFocused = $( event.target ).is( '.widget-tpl:visible:last' );

if ( isDown || isUp ) {
				if ( isDown ) {
					if ( isSearchFocused ) {
						selected = firstVisible;
					} else if ( this.selected && this.selected.nextAll( '.widget-tpl:visible' ).length !== 0 ) {
						selected = this.selected.nextAll( '.widget-tpl:visible:first' );
					}
				} else if ( isUp ) {
					if ( isSearchFocused ) {
						selected = lastVisible;
					} else if ( this.selected && this.selected.prevAll( '.widget-tpl:visible' ).length !== 0 ) {
						selected = this.selected.prevAll( '.widget-tpl:visible:first' );
					}
				}

this.select( selected );

if ( selected ) {
					selected.trigger( 'focus' );
				} else {
					this.$search.trigger( 'focus' );
				}

return;
			}

// If enter pressed but nothing entered, don't do anything.
			if ( isEnter && ! this.$search.val() ) {
				return;
			}

if ( isEnter ) {
				this.submit();
			} else if ( isEsc ) {
				this.close( { returnFocus: true } );
			}

if ( this.currentSidebarControl && isTab && ( isShift && isSearchFocused || ! isShift && isLastWidgetFocused ) ) {
				this.currentSidebarControl.container.find( '.add-new-widget' ).focus();
				event.preventDefault();
			}
		}
	});

/**
	 * Handlers for the widget-synced event, organized by widget ID base.
	 * Other widgets may provide their own update handlers by adding
	 * listeners for the widget-synced event.
	 *
	 * @alias    wp.customize.Widgets.formSyncHandlers
	 */
	api.Widgets.formSyncHandlers = {

/**
		 * @param {jQuery.Event} e
		 * @param {jQuery} widget
		 * @param {string} newForm
		 */
		rss: function( e, widget, newForm ) {
			var oldWidgetError = widget.find( '.widget-error:first' ),
				newWidgetError = $( '<div>' + newForm + '</div>' ).find( '.widget-error:first' );

if ( oldWidgetError.length && newWidgetError.length ) {
				oldWidgetError.replaceWith( newWidgetError );
			} else if ( oldWidgetError.length ) {
				oldWidgetError.remove();
			} else if ( newWidgetError.length ) {
				widget.find( '.widget-content:first' ).prepend( newWidgetError );
			}
		}
	};

api.Widgets.WidgetControl = api.Control.extend(/** @lends wp.customize.Widgets.WidgetControl.prototype */{
		defaultExpandedArguments: {
			duration: 'fast',
			completeCallback: $.noop
		},

/**
		 * wp.customize.Widgets.WidgetControl
		 *
		 * Customizer control for widgets.
		 * Note that 'widget_form' must match the WP_Widget_Form_Customize_Control::$type
		 *
		 * @since 4.1.0
		 *
		 * @constructs wp.customize.Widgets.WidgetControl
		 * @augments   wp.customize.Control
		 */
		initialize: function( id, options ) {
			var control = this;

control.widgetControlEmbedded = false;
			control.widgetContentEmbedded = false;
			control.expanded = new api.Value( false );
			control.expandedArgumentsQueue = [];
			control.expanded.bind( function( expanded ) {
				var args = control.expandedArgumentsQueue.shift();
				args = $.extend( {}, control.defaultExpandedArguments, args );
				control.onChangeExpanded( expanded, args );
			});
			control.altNotice = true;

api.Control.prototype.initialize.call( control, id, options );
		},

/**
		 * Set up the control.
		 *
		 * @since 3.9.0
		 */
		ready: function() {
			var control = this;

/*
			 * Embed a placeholder once the section is expanded. The full widget
			 * form content will be embedded once the control itself is expanded,
			 * and at this point the widget-added event will be triggered.
			 */
			if ( ! control.section() ) {
				control.embedWidgetControl();
			} else {
				api.section( control.section(), function( section ) {
					var onExpanded = function( isExpanded ) {
						if ( isExpanded ) {
							control.embedWidgetControl();
							section.expanded.unbind( onExpanded );
						}
					};
					if ( section.expanded() ) {
						onExpanded( true );
					} else {
						section.expanded.bind( onExpanded );
					}
				} );
			}
		},

/**
		 * Embed the .widget element inside the li container.
		 *
		 * @since 4.4.0
		 */
		embedWidgetControl: function() {
			var control = this, widgetControl;

if ( control.widgetControlEmbedded ) {
				return;
			}
			control.widgetControlEmbedded = true;

widgetControl = $( control.params.widget_control );
			control.container.append( widgetControl );

control._setupModel();
			control._setupWideWidget();
			control._setupControlToggle();

control._setupWidgetTitle();
			control._setupReorderUI();
			control._setupHighlightEffects();
			control._setupUpdateUI();
			control._setupRemoveUI();
		},

/**
		 * Embed the actual widget form inside of .widget-content and finally trigger the widget-added event.
		 *
		 * @since 4.4.0
		 */
		embedWidgetContent: function() {
			var control = this, widgetContent;

control.embedWidgetControl();
			if ( control.widgetContentEmbedded ) {
				return;
			}
			control.widgetContentEmbedded = true;

// Update the notification container element now that the widget content has been embedded.
			control.notifications.container = control.getNotificationsContainerElement();
			control.notifications.render();

widgetContent = $( control.params.widget_content );
			control.container.find( '.widget-content:first' ).append( widgetContent );

/*
			 * Trigger widget-added event so that plugins can attach any event
			 * listeners and dynamic UI elements.
			 */
			$( document ).trigger( 'widget-added', [ control.container.find( '.widget:first' ) ] );

/**
		 * Handle changes to the setting
		 */
		_setupModel: function() {
			var self = this, rememberSavedWidgetId;

// Remember saved widgets so we know which to trash (move to inactive widgets sidebar).
			rememberSavedWidgetId = function() {
				api.Widgets.savedWidgetIds[self.params.widget_id] = true;
			};
			api.bind( 'ready', rememberSavedWidgetId );
			api.bind( 'saved', rememberSavedWidgetId );

this._updateCount = 0;
			this.isWidgetUpdating = false;
			this.liveUpdateMode = true;

// Update widget whenever model changes.
			this.setting.bind( function( to, from ) {
				if ( ! _( from ).isEqual( to ) && ! self.isWidgetUpdating ) {
					self.updateWidget( { instance: to } );
				}
			} );
		},

/**
		 * Add special behaviors for wide widget controls
		 */
		_setupWideWidget: function() {
			var self = this, $widgetInside, $widgetForm, $customizeSidebar,
				$themeControlsContainer, positionWidget;

if ( ! this.params.is_wide || $( window ).width() <= 640 /* max-width breakpoint in customize-controls.css */ ) {
				return;
			}

$widgetInside = this.container.find( '.widget-inside' );
			$widgetForm = $widgetInside.find( '> .form' );
			$customizeSidebar = $( '.wp-full-overlay-sidebar-content:first' );
			this.container.addClass( 'wide-widget-control' );

this.container.find( '.form:first' ).css( {
				'max-width': this.params.width,
				'min-height': this.params.height
			} );

/**
			 * Keep the widget-inside positioned so the top of fixed-positioned
			 * element is at the same top position as the widget-top. When the
			 * widget-top is scrolled out of view, keep the widget-top in view;
			 * likewise, don't allow the widget to drop off the bottom of the window.
			 * If a widget is too tall to fit in the window, don't let the height
			 * exceed the window height so that the contents of the widget control
			 * will become scrollable (overflow:auto).
			 */
			positionWidget = function() {
				var offsetTop = self.container.offset().top,
					windowHeight = $( window ).height(),
					formHeight = $widgetForm.outerHeight(),
					top;
				$widgetInside.css( 'max-height', windowHeight );
				top = Math.max(
					0, // Prevent top from going off screen.
					Math.min(
						Math.max( offsetTop, 0 ), // Distance widget in panel is from top of screen.
						windowHeight - formHeight // Flush up against bottom of screen.
					)
				);
				$widgetInside.css( 'top', top );
			};

$themeControlsContainer = $( '#customize-theme-controls' );
			this.container.on( 'expand', function() {
				positionWidget();
				$customizeSidebar.on( 'scroll', positionWidget );
				$( window ).on( 'resize', positionWidget );
				$themeControlsContainer.on( 'expanded collapsed', positionWidget );
			} );
			this.container.on( 'collapsed', function() {
				$customizeSidebar.off( 'scroll', positionWidget );
				$( window ).off( 'resize', positionWidget );
				$themeControlsContainer.off( 'expanded collapsed', positionWidget );
			} );

// Reposition whenever a sidebar's widgets are changed.
			api.each( function( setting ) {
				if ( 0 === setting.id.indexOf( 'sidebars_widgets[' ) ) {
					setting.bind( function() {
						if ( self.container.hasClass( 'expanded' ) ) {
							positionWidget();
						}
					} );
				}
			} );
		},

/**
		 * Show/hide the control when clicking on the form title, when clicking
		 * the close button
		 */
		_setupControlToggle: function() {
			var self = this, $closeBtn;

this.container.find( '.widget-top' ).on( 'click', function( e ) {
				e.preventDefault();
				var sidebarWidgetsControl = self.getSidebarWidgetsControl();
				if ( sidebarWidgetsControl.isReordering ) {
					return;
				}
				self.expanded( ! self.expanded() );
			} );

$closeBtn = this.container.find( '.widget-control-close' );
			$closeBtn.on( 'click', function() {
				self.collapse();
				self.container.find( '.widget-top .widget-action:first' ).focus(); // Keyboard accessibility.
			} );
		},

/**
		 * Update the title of the form if a title field is entered
		 */
		_setupWidgetTitle: function() {
			var self = this, updateTitle;

updateTitle = function() {
				var title = self.setting().title,
					inWidgetTitle = self.container.find( '.in-widget-title' );

if ( title ) {
					inWidgetTitle.text( ': ' + title );
				} else {
					inWidgetTitle.text( '' );
				}
			};
			this.setting.bind( updateTitle );
			updateTitle();
		},

/**
		 * Set up the widget-reorder-nav
		 */
		_setupReorderUI: function() {
			var self = this, selectSidebarItem, $moveWidgetArea,
				$reorderNav, updateAvailableSidebars, template;

/**
			 * select the provided sidebar list item in the move widget area
			 *
			 * @param {jQuery} li
			 */
			selectSidebarItem = function( li ) {
				li.siblings( '.selected' ).removeClass( 'selected' );
				li.addClass( 'selected' );
				var isSelfSidebar = ( li.data( 'id' ) === self.params.sidebar_id );
				self.container.find( '.move-widget-btn' ).prop( 'disabled', isSelfSidebar );
			};

/**
			 * Add the widget reordering elements to the widget control
			 */
			this.container.find( '.widget-title-action' ).after( $( api.Widgets.data.tpl.widgetReorderNav ) );

template = _.template( api.Widgets.data.tpl.moveWidgetArea );
			$moveWidgetArea = $( template( {
					sidebars: _( api.Widgets.registeredSidebars.toArray() ).pluck( 'attributes' )
				} )
			);
			this.container.find( '.widget-top' ).after( $moveWidgetArea );

/**
			 * Update available sidebars when their rendered state changes
			 */
			updateAvailableSidebars = function() {
				var $sidebarItems = $moveWidgetArea.find( 'li' ), selfSidebarItem,
					renderedSidebarCount = 0;

selfSidebarItem = $sidebarItems.filter( function(){
					return $( this ).data( 'id' ) === self.params.sidebar_id;
				} );

$sidebarItems.each( function() {
					var li = $( this ),
						sidebarId, sidebar, sidebarIsRendered;

sidebarId = li.data( 'id' );
					sidebar = api.Widgets.registeredSidebars.get( sidebarId );
					sidebarIsRendered = sidebar.get( 'is_rendered' );

li.toggle( sidebarIsRendered );

if ( sidebarIsRendered ) {
						renderedSidebarCount += 1;
					}

if ( li.hasClass( 'selected' ) && ! sidebarIsRendered ) {
						selectSidebarItem( selfSidebarItem );
					}
				} );

if ( renderedSidebarCount > 1 ) {
					self.container.find( '.move-widget' ).show();
				} else {
					self.container.find( '.move-widget' ).hide();
				}
			};

updateAvailableSidebars();
			api.Widgets.registeredSidebars.on( 'change:is_rendered', updateAvailableSidebars );

/**
			 * Handle clicks for up/down/move on the reorder nav
			 */
			$reorderNav = this.container.find( '.widget-reorder-nav' );
			$reorderNav.find( '.move-widget, .move-widget-down, .move-widget-up' ).each( function() {
				$( this ).prepend( self.container.find( '.widget-title' ).text() + ': ' );
			} ).on( 'click keypress', function( event ) {
				if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) {
					return;
				}
				$( this ).trigger( 'focus' );

if ( $( this ).is( '.move-widget' ) ) {
					self.toggleWidgetMoveArea();
				} else {
					var isMoveDown = $( this ).is( '.move-widget-down' ),
						isMoveUp = $( this ).is( '.move-widget-up' ),
						i = self.getWidgetSidebarPosition();

if ( ( isMoveUp && i === 0 ) || ( isMoveDown && i === self.getSidebarWidgetsControl().setting().length - 1 ) ) {
						return;
					}

if ( isMoveUp ) {
						self.moveUp();
						wp.a11y.speak( l10n.widgetMovedUp );
					} else {
						self.moveDown();
						wp.a11y.speak( l10n.widgetMovedDown );
					}

$( this ).trigger( 'focus' ); // Re-focus after the container was moved.
				}
			} );

/**
			 * Handle selecting a sidebar to move to
			 */
			this.container.find( '.widget-area-select' ).on( 'click keypress', 'li', function( event ) {
				if ( event.type === 'keypress' && ( event.which !== 13 && event.which !== 32 ) ) {
					return;
				}
				event.preventDefault();
				selectSidebarItem( $( this ) );
			} );

/**
			 * Move widget to another sidebar
			 */
			this.container.find( '.move-widget-btn' ).click( function() {
				self.getSidebarWidgetsControl().toggleReordering( false );

var oldSidebarId = self.params.sidebar_id,
					newSidebarId = self.container.find( '.widget-area-select li.selected' ).data( 'id' ),
					oldSidebarWidgetsSetting, newSidebarWidgetsSetting,
					oldSidebarWidgetIds, newSidebarWidgetIds, i;

oldSidebarWidgetsSetting = api( 'sidebars_widgets[' + oldSidebarId + ']' );
				newSidebarWidgetsSetting = api( 'sidebars_widgets[' + newSidebarId + ']' );
				oldSidebarWidgetIds = Array.prototype.slice.call( oldSidebarWidgetsSetting() );
				newSidebarWidgetIds = Array.prototype.slice.call( newSidebarWidgetsSetting() );

i = self.getWidgetSidebarPosition();
				oldSidebarWidgetIds.splice( i, 1 );
				newSidebarWidgetIds.push( self.params.widget_id );

oldSidebarWidgetsSetting( oldSidebarWidgetIds );
				newSidebarWidgetsSetting( newSidebarWidgetIds );

self.focus();
			} );
		},

/**
		 * Highlight widgets in preview when interacted with in the Customizer
		 */
		_setupHighlightEffects: function() {
			var self = this;

// Highlight whenever hovering or clicking over the form.
			this.container.on( 'mouseenter click', function() {
				self.setting.previewer.send( 'highlight-widget', self.params.widget_id );
			} );

// Highlight when the setting is updated.
			this.setting.bind( function() {
				self.setting.previewer.send( 'highlight-widget', self.params.widget_id );
			} );
		},

/**
		 * Set up event handlers for widget updating
		 */
		_setupUpdateUI: function() {
			var self = this, $widgetRoot, $widgetContent,
				$saveBtn, updateWidgetDebounced, formSyncHandler;

$widgetRoot = this.container.find( '.widget:first' );
			$widgetContent = $widgetRoot.find( '.widget-content:first' );

// Configure update button.
			$saveBtn = this.container.find( '.widget-control-save' );
			$saveBtn.val( l10n.saveBtnLabel );
			$saveBtn.attr( 'title', l10n.saveBtnTooltip );
			$saveBtn.removeClass( 'button-primary' );
			$saveBtn.on( 'click', function( e ) {
				e.preventDefault();
				self.updateWidget( { disable_form: true } ); // @todo disable_form is unused?
			} );

updateWidgetDebounced = _.debounce( function() {
				self.updateWidget();
			}, 250 );

// Trigger widget form update when hitting Enter within an input.
			$widgetContent.on( 'keydown', 'input', function( e ) {
				if ( 13 === e.which ) { // Enter.
					e.preventDefault();
					self.updateWidget( { ignoreActiveElement: true } );
				}
			} );

// Handle widgets that support live previews.
			$widgetContent.on( 'change input propertychange', ':input', function( e ) {
				if ( ! self.liveUpdateMode ) {
					return;
				}
				if ( e.type === 'change' || ( this.checkValidity && this.checkValidity() ) ) {
					updateWidgetDebounced();
				}
			} );

// Remove loading indicators when the setting is saved and the preview updates.
			this.setting.previewer.channel.bind( 'synced', function() {
				self.container.removeClass( 'previewer-loading' );
			} );

api.previewer.bind( 'widget-updated', function( updatedWidgetId ) {
				if ( updatedWidgetId === self.params.widget_id ) {
					self.container.removeClass( 'previewer-loading' );
				}
			} );

formSyncHandler = api.Widgets.formSyncHandlers[ this.params.widget_id_base ];
			if ( formSyncHandler ) {
				$( document ).on( 'widget-synced', function( e, widget ) {
					if ( $widgetRoot.is( widget ) ) {
						formSyncHandler.apply( document, arguments );
					}
				} );
			}
		},

/**
		 * Update widget control to indicate whether it is currently rendered.
		 *
		 * Overrides api.Control.toggle()
		 *
		 * @since 4.1.0
		 *
		 * @param {boolean}   active
		 * @param {Object}    args
		 * @param {function}  args.completeCallback
		 */
		onChangeActive: function ( active, args ) {
			// Note: there is a second 'args' parameter being passed, merged on top of this.defaultActiveArguments.
			this.container.toggleClass( 'widget-rendered', active );
			if ( args.completeCallback ) {
				args.completeCallback();
			}
		},

/**
		 * Set up event handlers for widget removal
		 */
		_setupRemoveUI: function() {
			var self = this, $removeBtn, replaceDeleteWithRemove;

// Configure remove button.
			$removeBtn = this.container.find( '.widget-control-remove' );
			$removeBtn.on( 'click', function() {
				// Find an adjacent element to add focus to when this widget goes away.
				var $adjacentFocusTarget;
				if ( self.container.next().is( '.customize-control-widget_form' ) ) {
					$adjacentFocusTarget = self.container.next().find( '.widget-action:first' );
				} else if ( self.container.prev().is( '.customize-control-widget_form' ) ) {
					$adjacentFocusTarget = self.container.prev().find( '.widget-action:first' );
				} else {
					$adjacentFocusTarget = self.container.next( '.customize-control-sidebar_widgets' ).find( '.add-new-widget:first' );
				}

self.container.slideUp( function() {
					var sidebarsWidgetsControl = api.Widgets.getSidebarWidgetControlContainingWidget( self.params.widget_id ),
						sidebarWidgetIds, i;

if ( ! sidebarsWidgetsControl ) {
						return;
					}

sidebarWidgetIds = sidebarsWidgetsControl.setting().slice();
					i = _.indexOf( sidebarWidgetIds, self.params.widget_id );
					if ( -1 === i ) {
						return;
					}

sidebarWidgetIds.splice( i, 1 );
					sidebarsWidgetsControl.setting( sidebarWidgetIds );

$adjacentFocusTarget.focus(); // Keyboard accessibility.
				} );
			} );

replaceDeleteWithRemove = function() {
				$removeBtn.text( l10n.removeBtnLabel ); // wp_widget_control() outputs the button as "Delete".
				$removeBtn.attr( 'title', l10n.removeBtnTooltip );
			};

if ( this.params.is_new ) {
				api.bind( 'saved', replaceDeleteWithRemove );
			} else {
				replaceDeleteWithRemove();
			}
		},

/**
		 * Find all inputs in a widget container that should be considered when
		 * comparing the loaded form with the sanitized form, whose fields will
		 * be aligned to copy the sanitized over. The elements returned by this
		 * are passed into this._getInputsSignature(), and they are iterated
		 * over when copying sanitized values over to the form loaded.
		 *
		 * @param {jQuery} container element in which to look for inputs
		 * @return {jQuery} inputs
		 * @private
		 */
		_getInputs: function( container ) {
			return $( container ).find( ':input[name]' );
		},

/**
		 * Iterate over supplied inputs and create a signature string for all of them together.
		 * This string can be used to compare whether or not the form has all of the same fields.
		 *
		 * @param {jQuery} inputs
		 * @return {string}
		 * @private
		 */
		_getInputsSignature: function( inputs ) {
			var inputsSignatures = _( inputs ).map( function( input ) {
				var $input = $( input ), signatureParts;

if ( $input.is( ':checkbox, :radio' ) ) {
					signatureParts = [ $input.attr( 'id' ), $input.attr( 'name' ), $input.prop( 'value' ) ];
				} else {
					signatureParts = [ $input.attr( 'id' ), $input.attr( 'name' ) ];
				}

return signatureParts.join( ',' );
			} );

return inputsSignatures.join( ';' );
		},

/**
		 * Get the state for an input depending on its type.
		 *
		 * @param {jQuery|Element} input
		 * @return {string|boolean|Array|*}
		 * @private
		 */
		_getInputState: function( input ) {
			input = $( input );
			if ( input.is( ':radio, :checkbox' ) ) {
				return input.prop( 'checked' );
			} else if ( input.is( 'select[multiple]' ) ) {
				return input.find( 'option:selected' ).map( function () {
					return $( this ).val();
				} ).get();
			} else {
				return input.val();
			}
		},

/**
		 * Update an input's state based on its type.
		 *
		 * @param {jQuery|Element} input
		 * @param {string|boolean|Array|*} state
		 * @private
		 */
		_setInputState: function ( input, state ) {
			input = $( input );
			if ( input.is( ':radio, :checkbox' ) ) {
				input.prop( 'checked', state );
			} else if ( input.is( 'select[multiple]' ) ) {
				if ( ! Array.isArray( state ) ) {
					state = [];
				} else {
					// Make sure all state items are strings since the DOM value is a string.
					state = _.map( state, function ( value ) {
						return String( value );
					} );
				}
				input.find( 'option' ).each( function () {
					$( this ).prop( 'selected', -1 !== _.indexOf( state, String( this.value ) ) );
				} );
			} else {
				input.val( state );
			}
		},

/***********************************************************************
		 * Begin public API methods
		 **********************************************************************/

/**
		 * @return {wp.customize.controlConstructor.sidebar_widgets[]}
		 */
		getSidebarWidgetsControl: function() {
			var settingId, sidebarWidgetsControl;

settingId = 'sidebars_widgets[' + this.params.sidebar_id + ']';
			sidebarWidgetsControl = api.control( settingId );

if ( ! sidebarWidgetsControl ) {
				return;
			}

return sidebarWidgetsControl;
		},

/**
		 * Submit the widget form via Ajax and get back the updated instance,
		 * along with the new widget control form to render.
		 *
		 * @param {Object} [args]
		 * @param {Object|null} [args.instance=null]  When the model changes, the instance is sent here; otherwise, the inputs from the form are used
		 * @param {Function|null} [args.complete=null]  Function which is called when the request finishes. Context is bound to the control. First argument is any error. Following arguments are for success.
		 * @param {boolean} [args.ignoreActiveElement=false] Whether or not updating a field will be deferred if focus is still on the element.
		 */
		updateWidget: function( args ) {
			var self = this, instanceOverride, completeCallback, $widgetRoot, $widgetContent,
				updateNumber, params, data, $inputs, processing, jqxhr, isChanged;

// The updateWidget logic requires that the form fields to be fully present.
			self.embedWidgetContent();

args = $.extend( {
				instance: null,
				complete: null,
				ignoreActiveElement: false
			}, args );

instanceOverride = args.instance;
			completeCallback = args.complete;

this._updateCount += 1;
			updateNumber = this._updateCount;

$widgetRoot = this.container.find( '.widget:first' );
			$widgetContent = $widgetRoot.find( '.widget-content:first' );

// Remove a previous error message.
			$widgetContent.find( '.widget-error' ).remove();

this.container.addClass( 'widget-form-loading' );
			this.container.addClass( 'previewer-loading' );
			processing = api.state( 'processing' );
			processing( processing() + 1 );

if ( ! this.liveUpdateMode ) {
				this.container.addClass( 'widget-form-disabled' );
			}

params = {};
			params.action = 'update-widget';
			params.wp_customize = 'on';
			params.nonce = api.settings.nonce['update-widget'];
			params.customize_theme = api.settings.theme.stylesheet;
			params.customized = wp.customize.previewer.query().customized;

data = $.param( params );
			$inputs = this._getInputs( $widgetContent );

/*
			 * Store the value we're submitting in data so that when the response comes back,
			 * we know if it got sanitized; if there is no difference in the sanitized value,
			 * then we do not need to touch the UI and mess up the user's ongoing editing.
			 */
			$inputs.each( function() {
				$( this ).data( 'state' + updateNumber, self._getInputState( this ) );
			} );

if ( instanceOverride ) {
				data += '&' + $.param( { 'sanitized_widget_setting': JSON.stringify( instanceOverride ) } );
			} else {
				data += '&' + $inputs.serialize();
			}
			data += '&' + $widgetContent.find( '~ :input' ).serialize();

if ( this._previousUpdateRequest ) {
				this._previousUpdateRequest.abort();
			}
			jqxhr = $.post( wp.ajax.settings.url, data );
			this._previousUpdateRequest = jqxhr;

jqxhr.done( function( r ) {
				var message, sanitizedForm,	$sanitizedInputs, hasSameInputsInResponse,
					isLiveUpdateAborted = false;

// Check if the user is logged out.
				if ( '0' === r ) {
					api.previewer.preview.iframe.hide();
					api.previewer.login().done( function() {
						self.updateWidget( args );
						api.previewer.preview.iframe.show();
					} );
					return;
				}

// Check for cheaters.
				if ( '-1' === r ) {
					api.previewer.cheatin();
					return;
				}

if ( r.success ) {
					sanitizedForm = $( '<div>' + r.data.form + '</div>' );
					$sanitizedInputs = self._getInputs( sanitizedForm );
					hasSameInputsInResponse = self._getInputsSignature( $inputs ) === self._getInputsSignature( $sanitizedInputs );

// Restore live update mode if sanitized fields are now aligned with the existing fields.
					if ( hasSameInputsInResponse && ! self.liveUpdateMode ) {
						self.liveUpdateMode = true;
						self.container.removeClass( 'widget-form-disabled' );
						self.container.find( 'input[name="savewidget"]' ).hide();
					}

// Sync sanitized field states to existing fields if they are aligned.
					if ( hasSameInputsInResponse && self.liveUpdateMode ) {
						$inputs.each( function( i ) {
							var $input = $( this ),
								$sanitizedInput = $( $sanitizedInputs[i] ),
								submittedState, sanitizedState,	canUpdateState;

submittedState = $input.data( 'state' + updateNumber );
							sanitizedState = self._getInputState( $sanitizedInput );
							$input.data( 'sanitized', sanitizedState );

canUpdateState = ( ! _.isEqual( submittedState, sanitizedState ) && ( args.ignoreActiveElement || ! $input.is( document.activeElement ) ) );
							if ( canUpdateState ) {
								self._setInputState( $input, sanitizedState );
							}
						} );

$( document ).trigger( 'widget-synced', [ $widgetRoot, r.data.form ] );

// Otherwise, if sanitized fields are not aligned with existing fields, disable live update mode if enabled.
					} else if ( self.liveUpdateMode ) {
						self.liveUpdateMode = false;
						self.container.find( 'input[name="savewidget"]' ).show();
						isLiveUpdateAborted = true;

// Otherwise, replace existing form with the sanitized form.
					} else {
						$widgetContent.html( r.data.form );

self.container.removeClass( 'widget-form-disabled' );

$( document ).trigger( 'widget-updated', [ $widgetRoot ] );
					}

/**
					 * If the old instance is identical to the new one, there is nothing new
					 * needing to be rendered, and so we can preempt the event for the
					 * preview finishing loading.
					 */
					isChanged = ! isLiveUpdateAborted && ! _( self.setting() ).isEqual( r.data.instance );
					if ( isChanged ) {
						self.isWidgetUpdating = true; // Suppress triggering another updateWidget.
						self.setting( r.data.instance );
						self.isWidgetUpdating = false;
					} else {
						// No change was made, so stop the spinner now instead of when the preview would updates.
						self.container.removeClass( 'previewer-loading' );
					}

if ( completeCallback ) {
						completeCallback.call( self, null, { noChange: ! isChanged, ajaxFinished: true } );
					}
				} else {
					// General error message.
					message = l10n.error;

if ( r.data && r.data.message ) {
						message = r.data.message;
					}

if ( completeCallback ) {
						completeCallback.call( self, message );
					} else {
						$widgetContent.prepend( '<p class="widget-error"><strong>' + message + '</strong></p>' );
					}
				}
			} );

jqxhr.fail( function( jqXHR, textStatus ) {
				if ( completeCallback ) {
					completeCallback.call( self, textStatus );
				}
			} );

jqxhr.always( function() {
				self.container.removeClass( 'widget-form-loading' );

$inputs.each( function() {
					$( this ).removeData( 'state' + updateNumber );
				} );

processing( processing() - 1 );
			} );
		},

/**
		 * Expand the accordion section containing a control
		 */
		expandControlSection: function() {
			api.Control.prototype.expand.call( this );
		},

/**
		 * @since 4.1.0
		 *
		 * @param {Boolean} expanded
		 * @param {Object} [params]
		 * @return {Boolean} False if state already applied.
		 */
		_toggleExpanded: api.Section.prototype._toggleExpanded,

/**
		 * @since 4.1.0
		 *
		 * @param {Object} [params]
		 * @return {Boolean} False if already expanded.
		 */
		expand: api.Section.prototype.expand,

/**
		 * Expand the widget form control
		 *
		 * @deprecated 4.1.0 Use this.expand() instead.
		 */
		expandForm: function() {
			this.expand();
		},

/**
		 * @since 4.1.0
		 *
		 * @param {Object} [params]
		 * @return {Boolean} False if already collapsed.
		 */
		collapse: api.Section.prototype.collapse,

/**
		 * Collapse the widget form control
		 *
		 * @deprecated 4.1.0 Use this.collapse() instead.
		 */
		collapseForm: function() {
			this.collapse();
		},

/**
		 * Expand or collapse the widget control
		 *
		 * @deprecated this is poor naming, and it is better to directly set control.expanded( showOrHide )
		 *
		 * @param {boolean|undefined} [showOrHide] If not supplied, will be inverse of current visibility
		 */
		toggleForm: function( showOrHide ) {
			if ( typeof showOrHide === 'undefined' ) {
				showOrHide = ! this.expanded();
			}
			this.expanded( showOrHide );
		},

/**
		 * Respond to change in the expanded state.
		 *
		 * @param {boolean} expanded
		 * @param {Object} args  merged on top of this.defaultActiveArguments
		 */
		onChangeExpanded: function ( expanded, args ) {
			var self = this, $widget, $inside, complete, prevComplete, expandControl, $toggleBtn;

self.embedWidgetControl(); // Make sure the outer form is embedded so that the expanded state can be set in the UI.
			if ( expanded ) {
				self.embedWidgetContent();
			}

// If the expanded state is unchanged only manipulate container expanded states.
			if ( args.unchanged ) {
				if ( expanded ) {
					api.Control.prototype.expand.call( self, {
						completeCallback:  args.completeCallback
					});
				}
				return;
			}

$widget = this.container.find( 'div.widget:first' );
			$inside = $widget.find( '.widget-inside:first' );
			$toggleBtn = this.container.find( '.widget-top button.widget-action' );

expandControl = function() {

// Close all other widget controls before expanding this one.
				api.control.each( function( otherControl ) {
					if ( self.params.type === otherControl.params.type && self !== otherControl ) {
						otherControl.collapse();
					}
				} );

complete = function() {
					self.container.removeClass( 'expanding' );
					self.container.addClass( 'expanded' );
					$widget.addClass( 'open' );
					$toggleBtn.attr( 'aria-expanded', 'true' );
					self.container.trigger( 'expanded' );
				};
				if ( args.completeCallback ) {
					prevComplete = complete;
					complete = function () {
						prevComplete();
						args.completeCallback();
					};
				}

if ( self.params.is_wide ) {
					$inside.fadeIn( args.duration, complete );
				} else {
					$inside.slideDown( args.duration, complete );
				}

self.container.trigger( 'expand' );
				self.container.addClass( 'expanding' );
			};

if ( $toggleBtn.attr( 'aria-expanded' ) === 'false' ) {
				if ( api.section.has( self.section() ) ) {
					api.section( self.section() ).expand( {
						completeCallback: expandControl
					} );
				} else {
					expandControl();
				}
			} else {
				complete = function() {
					self.container.removeClass( 'collapsing' );
					self.container.removeClass( 'expanded' );
					$widget.removeClass( 'open' );
					$toggleBtn.attr( 'aria-expanded', 'false' );
					self.container.trigger( 'collapsed' );
				};
				if ( args.completeCallback ) {
					prevComplete = complete;
					complete = function () {
						prevComplete();
						args.completeCallback();
					};
				}

self.container.trigger( 'collapse' );
				self.container.addClass( 'collapsing' );

if ( self.params.is_wide ) {
					$inside.fadeOut( args.duration, complete );
				} else {
					$inside.slideUp( args.duration, function() {
						$widget.css( { width:'', margin:'' } );
						complete();
					} );
				}
			}
		},

/**
		 * Get the position (index) of the widget in the containing sidebar
		 *
		 * @return {number}
		 */
		getWidgetSidebarPosition: function() {
			var sidebarWidgetIds, position;

sidebarWidgetIds = this.getSidebarWidgetsControl().setting();
			position = _.indexOf( sidebarWidgetIds, this.params.widget_id );

if ( position === -1 ) {
				return;
			}

return position;
		},

/**
		 * Move widget up one in the sidebar
		 */
		moveUp: function() {
			this._moveWidgetByOne( -1 );
		},

/**
		 * Move widget up one in the sidebar
		 */
		moveDown: function() {
			this._moveWidgetByOne( 1 );
		},

/**
		 * @private
		 *
		 * @param {number} offset 1|-1
		 */
		_moveWidgetByOne: function( offset ) {
			var i, sidebarWidgetsSetting, sidebarWidgetIds,	adjacentWidgetId;

i = this.getWidgetSidebarPosition();

sidebarWidgetsSetting = this.getSidebarWidgetsControl().setting;
			sidebarWidgetIds = Array.prototype.slice.call( sidebarWidgetsSetting() ); // Clone.
			adjacentWidgetId = sidebarWidgetIds[i + offset];
			sidebarWidgetIds[i + offset] = this.params.widget_id;
			sidebarWidgetIds[i] = adjacentWidgetId;

sidebarWidgetsSetting( sidebarWidgetIds );
		},

/**
		 * Toggle visibility of the widget move area
		 *
		 * @param {boolean} [showOrHide]
		 */
		toggleWidgetMoveArea: function( showOrHide ) {
			var self = this, $moveWidgetArea;

$moveWidgetArea = this.container.find( '.move-widget-area' );

if ( typeof showOrHide === 'undefined' ) {
				showOrHide = ! $moveWidgetArea.hasClass( 'active' );
			}

if ( showOrHide ) {
				// Reset the selected sidebar.
				$moveWidgetArea.find( '.selected' ).removeClass( 'selected' );

$moveWidgetArea.find( 'li' ).filter( function() {
					return $( this ).data( 'id' ) === self.params.sidebar_id;
				} ).addClass( 'selected' );

this.container.find( '.move-widget-btn' ).prop( 'disabled', true );
			}

$moveWidgetArea.toggleClass( 'active', showOrHide );
		},

/**
		 * Highlight the widget control and section
		 */
		highlightSectionAndControl: function() {
			var $target;

if ( this.container.is( ':hidden' ) ) {
				$target = this.container.closest( '.control-section' );
			} else {
				$target = this.container;
			}

$( '.highlighted' ).removeClass( 'highlighted' );
			$target.addClass( 'highlighted' );

setTimeout( function() {
				$target.removeClass( 'highlighted' );
			}, 500 );
		}
	} );

/**
	 * wp.customize.Widgets.WidgetsPanel
	 *
	 * Customizer panel containing the widget area sections.
	 *
	 * @since 4.4.0
	 *
	 * @class    wp.customize.Widgets.WidgetsPanel
	 * @augments wp.customize.Panel
	 */
	api.Widgets.WidgetsPanel = api.Panel.extend(/** @lends wp.customize.Widgets.WigetsPanel.prototype */{

/**
		 * Add and manage the display of the no-rendered-areas notice.
		 *
		 * @since 4.4.0
		 */
		ready: function () {
			var panel = this;

api.Panel.prototype.ready.call( panel );

panel.deferred.embedded.done(function() {
				var panelMetaContainer, noticeContainer, updateNotice, getActiveSectionCount, shouldShowNotice;
				panelMetaContainer = panel.container.find( '.panel-meta' );

// @todo This should use the Notifications API introduced to panels. See <https://core.trac.wordpress.org/ticket/38794>.
				noticeContainer = $( '<div></div>', {
					'class': 'no-widget-areas-rendered-notice'
				});
				panelMetaContainer.append( noticeContainer );

/**
				 * Get the number of active sections in the panel.
				 *
				 * @return {number} Number of active sidebar sections.
				 */
				getActiveSectionCount = function() {
					return _.filter( panel.sections(), function( section ) {
						return 'sidebar' === section.params.type && section.active();
					} ).length;
				};

/**
				 * Determine whether or not the notice should be displayed.
				 *
				 * @return {boolean}
				 */
				shouldShowNotice = function() {
					var activeSectionCount = getActiveSectionCount();
					if ( 0 === activeSectionCount ) {
						return true;
					} else {
						return activeSectionCount !== api.Widgets.data.registeredSidebars.length;
					}
				};

/**
				 * Update the notice.
				 *
				 * @return {void}
				 */
				updateNotice = function() {
					var activeSectionCount = getActiveSectionCount(), someRenderedMessage, nonRenderedAreaCount, registeredAreaCount;
					noticeContainer.empty();

registeredAreaCount = api.Widgets.data.registeredSidebars.length;
					if ( activeSectionCount !== registeredAreaCount ) {

if ( 0 !== activeSectionCount ) {
							nonRenderedAreaCount = registeredAreaCount - activeSectionCount;
							someRenderedMessage = l10n.someAreasShown[ nonRenderedAreaCount ];
						} else {
							someRenderedMessage = l10n.noAreasShown;
						}
						if ( someRenderedMessage ) {
							noticeContainer.append( $( '<p></p>', {
								text: someRenderedMessage
							} ) );
						}

noticeContainer.append( $( '<p></p>', {
							text: l10n.navigatePreview
						} ) );
					}
				};
				updateNotice();

/*
				 * Set the initial visibility state for rendered notice.
				 * Update the visibility of the notice whenever a reflow happens.
				 */
				noticeContainer.toggle( shouldShowNotice() );
				api.previewer.deferred.active.done( function () {
					noticeContainer.toggle( shouldShowNotice() );
				});
				api.bind( 'pane-contents-reflowed', function() {
					var duration = ( 'resolved' === api.previewer.deferred.active.state() ) ? 'fast' : 0;
					updateNotice();
					if ( shouldShowNotice() ) {
						noticeContainer.slideDown( duration );
					} else {
						noticeContainer.slideUp( duration );
					}
				});
			});
		},

/**
		 * Allow an active widgets panel to be contextually active even when it has no active sections (widget areas).
		 *
		 * This ensures that the widgets panel appears even when there are no
		 * sidebars displayed on the URL currently being previewed.
		 *
		 * @since 4.4.0
		 *
		 * @return {boolean}
		 */
		isContextuallyActive: function() {
			var panel = this;
			return panel.active();
		}
	});

/**
	 * wp.customize.Widgets.SidebarSection
	 *
	 * Customizer section representing a widget area widget
	 *
	 * @since 4.1.0
	 *
	 * @class    wp.customize.Widgets.SidebarSection
	 * @augments wp.customize.Section
	 */
	api.Widgets.SidebarSection = api.Section.extend(/** @lends wp.customize.Widgets.SidebarSection.prototype */{

/**
		 * Sync the section's active state back to the Backbone model's is_rendered attribute
		 *
		 * @since 4.1.0
		 */
		ready: function () {
			var section = this, registeredSidebar;
			api.Section.prototype.ready.call( this );
			registeredSidebar = api.Widgets.registeredSidebars.get( section.params.sidebarId );
			section.active.bind( function ( active ) {
				registeredSidebar.set( 'is_rendered', active );
			});
			registeredSidebar.set( 'is_rendered', section.active() );
		}
	});

/**
	 * wp.customize.Widgets.SidebarControl
	 *
	 * Customizer control for widgets.
	 * Note that 'sidebar_widgets' must match the WP_Widget_Area_Customize_Control::$type
	 *
	 * @since 3.9.0
	 *
	 * @class    wp.customize.Widgets.SidebarControl
	 * @augments wp.customize.Control
	 */
	api.Widgets.SidebarControl = api.Control.extend(/** @lends wp.customize.Widgets.SidebarControl.prototype */{

/**
		 * Set up the control
		 */
		ready: function() {
			this.$controlSection = this.container.closest( '.control-section' );
			this.$sectionContent = this.container.closest( '.accordion-section-content' );

this._setupModel();
			this._setupSortable();
			this._setupAddition();
			this._applyCardinalOrderClassNames();
		},

/**
		 * Update ordering of widget control forms when the setting is updated
		 */
		_setupModel: function() {
			var self = this;

this.setting.bind( function( newWidgetIds, oldWidgetIds ) {
				var widgetFormControls, removedWidgetIds, priority;

removedWidgetIds = _( oldWidgetIds ).difference( newWidgetIds );

// Filter out any persistent widget IDs for widgets which have been deactivated.
				newWidgetIds = _( newWidgetIds ).filter( function( newWidgetId ) {
					var parsedWidgetId = parseWidgetId( newWidgetId );

return !! api.Widgets.availableWidgets.findWhere( { id_base: parsedWidgetId.id_base } );
				} );

widgetFormControls = _( newWidgetIds ).map( function( widgetId ) {
					var widgetFormControl = api.Widgets.getWidgetFormControlForWidget( widgetId );

if ( ! widgetFormControl ) {
						widgetFormControl = self.addWidget( widgetId );
					}

return widgetFormControl;
				} );

// Sort widget controls to their new positions.
				widgetFormControls.sort( function( a, b ) {
					var aIndex = _.indexOf( newWidgetIds, a.params.widget_id ),
						bIndex = _.indexOf( newWidgetIds, b.params.widget_id );
					return aIndex - bIndex;
				});

priority = 0;
				_( widgetFormControls ).each( function ( control ) {
					control.priority( priority );
					control.section( self.section() );
					priority += 1;
				});
				self.priority( priority ); // Make sure sidebar control remains at end.

// Re-sort widget form controls (including widgets form other sidebars newly moved here).
				self._applyCardinalOrderClassNames();

// If the widget was dragged into the sidebar, make sure the sidebar_id param is updated.
				_( widgetFormControls ).each( function( widgetFormControl ) {
					widgetFormControl.params.sidebar_id = self.params.sidebar_id;
				} );

// Cleanup after widget removal.
				_( removedWidgetIds ).each( function( removedWidgetId ) {

// Using setTimeout so that when moving a widget to another sidebar,
					// the other sidebars_widgets settings get a chance to update.
					setTimeout( function() {
						var removedControl, wasDraggedToAnotherSidebar, inactiveWidgets, removedIdBase,
							widget, isPresentInAnotherSidebar = false;

// Check if the widget is in another sidebar.
						api.each( function( otherSetting ) {
							if ( otherSetting.id === self.setting.id || 0 !== otherSetting.id.indexOf( 'sidebars_widgets[' ) || otherSetting.id === 'sidebars_widgets[wp_inactive_widgets]' ) {
								return;
							}

var otherSidebarWidgets = otherSetting(), i;

i = _.indexOf( otherSidebarWidgets, removedWidgetId );
							if ( -1 !== i ) {
								isPresentInAnotherSidebar = true;
							}
						} );

// If the widget is present in another sidebar, abort!
						if ( isPresentInAnotherSidebar ) {
							return;
						}

removedControl = api.Widgets.getWidgetFormControlForWidget( removedWidgetId );

// Detect if widget control was dragged to another sidebar.
						wasDraggedToAnotherSidebar = removedControl && $.contains( document, removedControl.container[0] ) && ! $.contains( self.$sectionContent[0], removedControl.container[0] );

// Delete any widget form controls for removed widgets.
						if ( removedControl && ! wasDraggedToAnotherSidebar ) {
							api.control.remove( removedControl.id );
							removedControl.container.remove();
						}

// Move widget to inactive widgets sidebar (move it to Trash) if has been previously saved.
						// This prevents the inactive widgets sidebar from overflowing with throwaway widgets.
						if ( api.Widgets.savedWidgetIds[removedWidgetId] ) {
							inactiveWidgets = api.value( 'sidebars_widgets[wp_inactive_widgets]' )().slice();
							inactiveWidgets.push( removedWidgetId );
							api.value( 'sidebars_widgets[wp_inactive_widgets]' )( _( inactiveWidgets ).unique() );
						}

// Make old single widget available for adding again.
						removedIdBase = parseWidgetId( removedWidgetId ).id_base;
						widget = api.Widgets.availableWidgets.findWhere( { id_base: removedIdBase } );
						if ( widget && ! widget.get( 'is_multi' ) ) {
							widget.set( 'is_disabled', false );
						}
					} );

} );
			} );
		},

/**
		 * Allow widgets in sidebar to be re-ordered, and for the order to be previewed
		 */
		_setupSortable: function() {
			var self = this;

this.isReordering = false;

/**
			 * Update widget order setting when controls are re-ordered
			 */
			this.$sectionContent.sortable( {
				items: '> .customize-control-widget_form',
				handle: '.widget-top',
				axis: 'y',
				tolerance: 'pointer',
				connectWith: '.accordion-section-content:has(.customize-control-sidebar_widgets)',
				update: function() {
					var widgetContainerIds = self.$sectionContent.sortable( 'toArray' ), widgetIds;

widgetIds = $.map( widgetContainerIds, function( widgetContainerId ) {
						return $( '#' + widgetContainerId ).find( ':input[name=widget-id]' ).val();
					} );

self.setting( widgetIds );
				}
			} );

/**
			 * Expand other Customizer sidebar section when dragging a control widget over it,
			 * allowing the control to be dropped into another section
			 */
			this.$controlSection.find( '.accordion-section-title' ).droppable({
				accept: '.customize-control-widget_form',
				over: function() {
					var section = api.section( self.section.get() );
					section.expand({
						allowMultiple: true, // Prevent the section being dragged from to be collapsed.
						completeCallback: function () {
							// @todo It is not clear when refreshPositions should be called on which sections, or if it is even needed.
							api.section.each( function ( otherSection ) {
								if ( otherSection.container.find( '.customize-control-sidebar_widgets' ).length ) {
									otherSection.container.find( '.accordion-section-content:first' ).sortable( 'refreshPositions' );
								}
							} );
						}
					});
				}
			});

/**
			 * Keyboard-accessible reordering
			 */
			this.container.find( '.reorder-toggle' ).on( 'click', function() {
				self.toggleReordering( ! self.isReordering );
			} );
		},

/**
		 * Set up UI for adding a new widget
		 */
		_setupAddition: function() {
			var self = this;

this.container.find( '.add-new-widget' ).on( 'click', function() {
				var addNewWidgetBtn = $( this );

if ( self.$sectionContent.hasClass( 'reordering' ) ) {
					return;
				}

if ( ! $( 'body' ).hasClass( 'adding-widget' ) ) {
					addNewWidgetBtn.attr( 'aria-expanded', 'true' );
					api.Widgets.availableWidgetsPanel.open( self );
				} else {
					addNewWidgetBtn.attr( 'aria-expanded', 'false' );
					api.Widgets.availableWidgetsPanel.close();
				}
			} );
		},

/**
		 * Add classes to the widget_form controls to assist with styling
		 */
		_applyCardinalOrderClassNames: function() {
			var widgetControls = [];
			_.each( this.setting(), function ( widgetId ) {
				var widgetControl = api.Widgets.getWidgetFormControlForWidget( widgetId );
				if ( widgetControl ) {
					widgetControls.push( widgetControl );
				}
			});

if ( 0 === widgetControls.length || ( 1 === api.Widgets.registeredSidebars.length && widgetControls.length <= 1 ) ) {
				this.container.find( '.reorder-toggle' ).hide();
				return;
			} else {
				this.container.find( '.reorder-toggle' ).show();
			}

$( widgetControls ).each( function () {
				$( this.container )
					.removeClass( 'first-widget' )
					.removeClass( 'last-widget' )
					.find( '.move-widget-down, .move-widget-up' ).prop( 'tabIndex', 0 );
			});

_.first( widgetControls ).container
				.addClass( 'first-widget' )
				.find( '.move-widget-up' ).prop( 'tabIndex', -1 );

_.last( widgetControls ).container
				.addClass( 'last-widget' )
				.find( '.move-widget-down' ).prop( 'tabIndex', -1 );
		},

/***********************************************************************
		 * Begin public API methods
		 **********************************************************************/

/**
		 * Enable/disable the reordering UI
		 *
		 * @param {boolean} showOrHide to enable/disable reordering
		 *
		 * @todo We should have a reordering state instead and rename this to onChangeReordering
		 */
		toggleReordering: function( showOrHide ) {
			var addNewWidgetBtn = this.$sectionContent.find( '.add-new-widget' ),
				reorderBtn = this.container.find( '.reorder-toggle' ),
				widgetsTitle = this.$sectionContent.find( '.widget-title' );

showOrHide = Boolean( showOrHide );

if ( showOrHide === this.$sectionContent.hasClass( 'reordering' ) ) {
				return;
			}

this.isReordering = showOrHide;
			this.$sectionContent.toggleClass( 'reordering', showOrHide );

if ( showOrHide ) {
				_( this.getWidgetFormControls() ).each( function( formControl ) {
					formControl.collapse();
				} );

addNewWidgetBtn.attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
				reorderBtn.attr( 'aria-label', l10n.reorderLabelOff );
				wp.a11y.speak( l10n.reorderModeOn );
				// Hide widget titles while reordering: title is already in the reorder controls.
				widgetsTitle.attr( 'aria-hidden', 'true' );
			} else {
				addNewWidgetBtn.removeAttr( 'tabindex aria-hidden' );
				reorderBtn.attr( 'aria-label', l10n.reorderLabelOn );
				wp.a11y.speak( l10n.reorderModeOff );
				widgetsTitle.attr( 'aria-hidden', 'false' );
			}
		},

/**
		 * Get the widget_form Customize controls associated with the current sidebar.
		 *
		 * @since 3.9.0
		 * @return {wp.customize.controlConstructor.widget_form[]}
		 */
		getWidgetFormControls: function() {
			var formControls = [];

_( this.setting() ).each( function( widgetId ) {
				var settingId = widgetIdToSettingId( widgetId ),
					formControl = api.control( settingId );
				if ( formControl ) {
					formControls.push( formControl );
				}
			} );

return formControls;
		},

/**
		 * @param {string} widgetId or an id_base for adding a previously non-existing widget.
		 * @return {Object|false} widget_form control instance, or false on error.
		 */
		addWidget: function( widgetId ) {
			var self = this, controlHtml, $widget, controlType = 'widget_form', controlContainer, controlConstructor,
				parsedWidgetId = parseWidgetId( widgetId ),
				widgetNumber = parsedWidgetId.number,
				widgetIdBase = parsedWidgetId.id_base,
				widget = api.Widgets.availableWidgets.findWhere( {id_base: widgetIdBase} ),
				settingId, isExistingWidget, widgetFormControl, sidebarWidgets, settingArgs, setting;

if ( ! widget ) {
				return false;
			}

if ( widgetNumber && ! widget.get( 'is_multi' ) ) {
				return false;
			}

// Set up new multi widget.
			if ( widget.get( 'is_multi' ) && ! widgetNumber ) {
				widget.set( 'multi_number', widget.get( 'multi_number' ) + 1 );
				widgetNumber = widget.get( 'multi_number' );
			}

controlHtml = $( '#widget-tpl-' + widget.get( 'id' ) ).html().trim();
			if ( widget.get( 'is_multi' ) ) {
				controlHtml = controlHtml.replace( /<[^<>]+>/g, function( m ) {
					return m.replace( /__i__|%i%/g, widgetNumber );
				} );
			} else {
				widget.set( 'is_disabled', true ); // Prevent single widget from being added again now.
			}

$widget = $( controlHtml );

controlContainer = $( '<li/>' )
				.addClass( 'customize-control' )
				.addClass( 'customize-control-' + controlType )
				.append( $widget );

// Remove icon which is visible inside the panel.
			controlContainer.find( '> .widget-icon' ).remove();

if ( widget.get( 'is_multi' ) ) {
				controlContainer.find( 'input[name="widget_number"]' ).val( widgetNumber );
				controlContainer.find( 'input[name="multi_number"]' ).val( widgetNumber );
			}

widgetId = controlContainer.find( '[name="widget-id"]' ).val();

controlContainer.hide(); // To be slid-down below.

settingId = 'widget_' + widget.get( 'id_base' );
			if ( widget.get( 'is_multi' ) ) {
				settingId += '[' + widgetNumber + ']';
			}
			controlContainer.attr( 'id', 'customize-control-' + settingId.replace( /\]/g, '' ).replace( /\[/g, '-' ) );

// Only create setting if it doesn't already exist (if we're adding a pre-existing inactive widget).
			isExistingWidget = api.has( settingId );
			if ( ! isExistingWidget ) {
				settingArgs = {
					transport: api.Widgets.data.selectiveRefreshableWidgets[ widget.get( 'id_base' ) ] ? 'postMessage' : 'refresh',
					previewer: this.setting.previewer
				};
				setting = api.create( settingId, settingId, '', settingArgs );
				setting.set( {} ); // Mark dirty, changing from '' to {}.
			}

controlConstructor = api.controlConstructor[controlType];
			widgetFormControl = new controlConstructor( settingId, {
				settings: {
					'default': settingId
				},
				content: controlContainer,
				sidebar_id: self.params.sidebar_id,
				widget_id: widgetId,
				widget_id_base: widget.get( 'id_base' ),
				type: controlType,
				is_new: ! isExistingWidget,
				width: widget.get( 'width' ),
				height: widget.get( 'height' ),
				is_wide: widget.get( 'is_wide' )
			} );
			api.control.add( widgetFormControl );

// Make sure widget is removed from the other sidebars.
			api.each( function( otherSetting ) {
				if ( otherSetting.id === self.setting.id ) {
					return;
				}

if ( 0 !== otherSetting.id.indexOf( 'sidebars_widgets[' ) ) {
					return;
				}

var otherSidebarWidgets = otherSetting().slice(),
					i = _.indexOf( otherSidebarWidgets, widgetId );

if ( -1 !== i ) {
					otherSidebarWidgets.splice( i );
					otherSetting( otherSidebarWidgets );
				}
			} );

// Add widget to this sidebar.
			sidebarWidgets = this.setting().slice();
			if ( -1 === _.indexOf( sidebarWidgets, widgetId ) ) {
				sidebarWidgets.push( widgetId );
				this.setting( sidebarWidgets );
			}

controlContainer.slideDown( function() {
				if ( isExistingWidget ) {
					widgetFormControl.updateWidget( {
						instance: widgetFormControl.setting()
					} );
				}
			} );

return widgetFormControl;
		}
	} );

// Register models for custom panel, section, and control types.
	$.extend( api.panelConstructor, {
		widgets: api.Widgets.WidgetsPanel
	});
	$.extend( api.sectionConstructor, {
		sidebar: api.Widgets.SidebarSection
	});
	$.extend( api.controlConstructor, {
		widget_form: api.Widgets.WidgetControl,
		sidebar_widgets: api.Widgets.SidebarControl
	});

/**
	 * Init Customizer for widgets.
	 */
	api.bind( 'ready', function() {
		// Set up the widgets panel.
		api.Widgets.availableWidgetsPanel = new api.Widgets.AvailableWidgetsPanelView({
			collection: api.Widgets.availableWidgets
		});

// Highlight widget control.
		api.previewer.bind( 'highlight-widget-control', api.Widgets.highlightWidgetFormControl );

// Open and focus widget control.
		api.previewer.bind( 'focus-widget-control', api.Widgets.focusWidgetFormControl );
	} );

/**
	 * Highlight a widget control.
	 *
	 * @param {string} widgetId
	 */
	api.Widgets.highlightWidgetFormControl = function( widgetId ) {
		var control = api.Widgets.getWidgetFormControlForWidget( widgetId );

if ( control ) {
			control.highlightSectionAndControl();
		}
	},

/**
	 * Focus a widget control.
	 *
	 * @param {string} widgetId
	 */
	api.Widgets.focusWidgetFormControl = function( widgetId ) {
		var control = api.Widgets.getWidgetFormControlForWidget( widgetId );

if ( control ) {
			control.focus();
		}
	},

/**
	 * Given a widget control, find the sidebar widgets control that contains it.
	 * @param {string} widgetId
	 * @return {Object|null}
	 */
	api.Widgets.getSidebarWidgetControlContainingWidget = function( widgetId ) {
		var foundControl = null;

// @todo This can use widgetIdToSettingId(), then pass into wp.customize.control( x ).getSidebarWidgetsControl().
		api.control.each( function( control ) {
			if ( control.params.type === 'sidebar_widgets' && -1 !== _.indexOf( control.setting(), widgetId ) ) {
				foundControl = control;
			}
		} );

return foundControl;
	};

/**
	 * Given a widget ID for a widget appearing in the preview, get the widget form control associated with it.
	 *
	 * @param {string} widgetId
	 * @return {Object|null}
	 */
	api.Widgets.getWidgetFormControlForWidget = function( widgetId ) {
		var foundControl = null;

// @todo We can just use widgetIdToSettingId() here.
		api.control.each( function( control ) {
			if ( control.params.type === 'widget_form' && control.params.widget_id === widgetId ) {
				foundControl = control;
			}
		} );

return foundControl;
	};

/**
	 * Initialize Edit Menu button in Nav Menu widget.
	 */
	$( document ).on( 'widget-added', function( event, widgetContainer ) {
		var parsedWidgetId, widgetControl, navMenuSelect, editMenuButton;
		parsedWidgetId = parseWidgetId( widgetContainer.find( '> .widget-inside > .form > .widget-id' ).val() );
		if ( 'nav_menu' !== parsedWidgetId.id_base ) {
			return;
		}
		widgetControl = api.control( 'widget_nav_menu[' + String( parsedWidgetId.number ) + ']' );
		if ( ! widgetControl ) {
			return;
		}
		navMenuSelect = widgetContainer.find( 'select[name*="nav_menu"]' );
		editMenuButton = widgetContainer.find( '.edit-selected-nav-menu > button' );
		if ( 0 === navMenuSelect.length || 0 === editMenuButton.length ) {
			return;
		}
		navMenuSelect.on( 'change', function() {
			if ( api.section.has( 'nav_menu[' + navMenuSelect.val() + ']' ) ) {
				editMenuButton.parent().show();
			} else {
				editMenuButton.parent().hide();
			}
		});
		editMenuButton.on( 'click', function() {
			var section = api.section( 'nav_menu[' + navMenuSelect.val() + ']' );
			if ( section ) {
				focusConstructWithBreadcrumb( section, widgetControl );
			}
		} );
	} );

/**
	 * Focus (expand) one construct and then focus on another construct after the first is collapsed.
	 *
	 * This overrides the back button to serve the purpose of breadcrumb navigation.
	 *
	 * @param {wp.customize.Section|wp.customize.Panel|wp.customize.Control} focusConstruct - The object to initially focus.
	 * @param {wp.customize.Section|wp.customize.Panel|wp.customize.Control} returnConstruct - The object to return focus.
	 */
	function focusConstructWithBreadcrumb( focusConstruct, returnConstruct ) {
		focusConstruct.focus();
		function onceCollapsed( isExpanded ) {
			if ( ! isExpanded ) {
				focusConstruct.expanded.unbind( onceCollapsed );
				returnConstruct.focus();
			}
		}
		focusConstruct.expanded.bind( onceCollapsed );
	}

/**
	 * @param {string} widgetId
	 * @return {Object}
	 */
	function parseWidgetId( widgetId ) {
		var matches, parsed = {
			number: null,
			id_base: null
		};

matches = widgetId.match( /^(.+)-(\d+)$/ );
		if ( matches ) {
			parsed.id_base = matches[1];
			parsed.number = parseInt( matches[2], 10 );
		} else {
			// Likely an old single widget.
			parsed.id_base = widgetId;
		}

return parsed;
	}

/**
	 * @param {string} widgetId
	 * @return {string} settingId
	 */
	function widgetIdToSettingId( widgetId ) {
		var parsed = parseWidgetId( widgetId ), settingId;

settingId = 'widget_' + parsed.id_base;
		if ( parsed.number ) {
			settingId += '[' + parsed.number + ']';
		}

return settingId;
	}

})( window.wp, jQuery );

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