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Edit File : customize-selective-refresh.js \| Size : 32.55 KB
/** * @output wp-includes/js/customize-selective-refresh.js / / global jQuery, JSON, _customizePartialRefreshExports, console / /* @namespace wp.customize.selectiveRefresh / wp.customize.selectiveRefresh = ( function( $, api ) { 'use strict'; var self, Partial, Placement; self = { ready: $.Deferred(), editShortcutVisibility: new api.Value(), data: { partials: {}, renderQueryVar: '', l10n: { shiftClickToEdit: '' } }, currentRequest: null }; _.extend( self, api.Events ); /* * A Customizer Partial. * * A partial provides a rendering of one or more settings according to a template. * * @memberOf wp.customize.selectiveRefresh * * @see PHP class WP_Customize_Partial. * * @class * @augments wp.customize.Class * @since 4.5.0 / Partial = self.Partial = api.Class.extend(/* @lends wp.customize.SelectiveRefresh.Partial.prototype /{ id: null, /* * Default params. * * @since 4.9.0 * @var {object} / defaults: { selector: null, primarySetting: null, containerInclusive: false, fallbackRefresh: true // Note this needs to be false in a front-end editing context. }, /* * Constructor. * * @since 4.5.0 * * @param {string} id - Unique identifier for the partial instance. * @param {Object} options - Options hash for the partial instance. * @param {string} options.type - Type of partial (e.g. nav_menu, widget, etc) * @param {string} options.selector - jQuery selector to find the container element in the page. * @param {Array} options.settings - The IDs for the settings the partial relates to. * @param {string} options.primarySetting - The ID for the primary setting the partial renders. * @param {boolean} options.fallbackRefresh - Whether to refresh the entire preview in case of a partial refresh failure. * @param {Object} [options.params] - Deprecated wrapper for the above properties. / initialize: function( id, options ) { var partial = this; options = options \|\| {}; partial.id = id; partial.params = _.extend( { settings: [] }, partial.defaults, options.params \|\| options ); partial.deferred = {}; partial.deferred.ready = $.Deferred(); partial.deferred.ready.done( function() { partial.ready(); } ); }, /* * Set up the partial. * * @since 4.5.0 / ready: function() { var partial = this; _.each( partial.placements(), function( placement ) { $( placement.container ).attr( 'title', self.data.l10n.shiftClickToEdit ); partial.createEditShortcutForPlacement( placement ); } ); $( document ).on( 'click', partial.params.selector, function( e ) { if ( ! e.shiftKey ) { return; } e.preventDefault(); _.each( partial.placements(), function( placement ) { if ( $( placement.container ).is( e.currentTarget ) ) { partial.showControl(); } } ); } ); }, /* * Create and show the edit shortcut for a given partial placement container. * * @since 4.7.0 * @access public * * @param {Placement} placement The placement container element. * @return {void} / createEditShortcutForPlacement: function( placement ) { var partial = this, $shortcut, $placementContainer, illegalAncestorSelector, illegalContainerSelector; if ( ! placement.container ) { return; } $placementContainer = $( placement.container ); illegalAncestorSelector = 'head'; illegalContainerSelector = 'area, audio, base, bdi, bdo, br, button, canvas, col, colgroup, command, datalist, embed, head, hr, html, iframe, img, input, keygen, label, link, map, math, menu, meta, noscript, object, optgroup, option, param, progress, rp, rt, ruby, script, select, source, style, svg, table, tbody, textarea, tfoot, thead, title, tr, track, video, wbr'; if ( ! $placementContainer.length \|\| $placementContainer.is( illegalContainerSelector ) \|\| $placementContainer.closest( illegalAncestorSelector ).length ) { return; } $shortcut = partial.createEditShortcut(); $shortcut.on( 'click', function( event ) { event.preventDefault(); event.stopPropagation(); partial.showControl(); } ); partial.addEditShortcutToPlacement( placement, $shortcut ); }, /* * Add an edit shortcut to the placement container. * * @since 4.7.0 * @access public * * @param {Placement} placement The placement for the partial. * @param {jQuery} $editShortcut The shortcut element as a jQuery object. * @return {void} / addEditShortcutToPlacement: function( placement, $editShortcut ) { var $placementContainer = $( placement.container ); $placementContainer.prepend( $editShortcut ); if ( ! $placementContainer.is( ':visible' ) \|\| 'none' === $placementContainer.css( 'display' ) ) { $editShortcut.addClass( 'customize-partial-edit-shortcut-hidden' ); } }, /* * Return the unique class name for the edit shortcut button for this partial. * * @since 4.7.0 * @access public * * @return {string} Partial ID converted into a class name for use in shortcut. / getEditShortcutClassName: function() { var partial = this, cleanId; cleanId = partial.id.replace( /]/g, '' ).replace( /\[/g, '-' ); return 'customize-partial-edit-shortcut-' + cleanId; }, /* * Return the appropriate translated string for the edit shortcut button. * * @since 4.7.0 * @access public * * @return {string} Tooltip for edit shortcut. / getEditShortcutTitle: function() { var partial = this, l10n = self.data.l10n; switch ( partial.getType() ) { case 'widget': return l10n.clickEditWidget; case 'blogname': return l10n.clickEditTitle; case 'blogdescription': return l10n.clickEditTitle; case 'nav_menu': return l10n.clickEditMenu; default: return l10n.clickEditMisc; } }, /* * Return the type of this partial * * Will use `params.type` if set, but otherwise will try to infer type from settingId. * * @since 4.7.0 * @access public * * @return {string} Type of partial derived from type param or the related setting ID. / getType: function() { var partial = this, settingId; settingId = partial.params.primarySetting \|\| _.first( partial.settings() ) \|\| 'unknown'; if ( partial.params.type ) { return partial.params.type; } if ( settingId.match( /^nav_menu_instance\[/ ) ) { return 'nav_menu'; } if ( settingId.match( /^widget_.+\[\d+]$/ ) ) { return 'widget'; } return settingId; }, /* * Create an edit shortcut button for this partial. * * @since 4.7.0 * @access public * * @return {jQuery} The edit shortcut button element. / createEditShortcut: function() { var partial = this, shortcutTitle, $buttonContainer, $button, $image; shortcutTitle = partial.getEditShortcutTitle(); $buttonContainer = $( '<span>', { 'class': 'customize-partial-edit-shortcut ' + partial.getEditShortcutClassName() } ); $button = $( '<button>', { 'aria-label': shortcutTitle, 'title': shortcutTitle, 'class': 'customize-partial-edit-shortcut-button' } ); $image = $( '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M13.89 3.39l2.71 2.72c.46.46.42 1.24.03 1.64l-8.01 8.02-5.56 1.16 1.16-5.58s7.6-7.63 7.99-8.03c.39-.39 1.22-.39 1.68.07zm-2.73 2.79l-5.59 5.61 1.11 1.11 5.54-5.65zm-2.97 8.23l5.58-5.6-1.07-1.08-5.59 5.6z"/></svg>' ); $button.append( $image ); $buttonContainer.append( $button ); return $buttonContainer; }, /* * Find all placements for this partial in the document. * * @since 4.5.0 * * @return {Array.<Placement>} / placements: function() { var partial = this, selector; selector = partial.params.selector \|\| ''; if ( selector ) { selector += ', '; } selector += '[data-customize-partial-id="' + partial.id + '"]'; // @todo Consider injecting customize-partial-id-${id} classnames instead. return $( selector ).map( function() { var container = $( this ), context; context = container.data( 'customize-partial-placement-context' ); if ( _.isString( context ) && '{' === context.substr( 0, 1 ) ) { throw new Error( 'context JSON parse error' ); } return new Placement( { partial: partial, container: container, context: context } ); } ).get(); }, /* * Get list of setting IDs related to this partial. * * @since 4.5.0 * * @return {string[]} / settings: function() { var partial = this; if ( partial.params.settings && 0 !== partial.params.settings.length ) { return partial.params.settings; } else if ( partial.params.primarySetting ) { return [ partial.params.primarySetting ]; } else { return [ partial.id ]; } }, /* * Return whether the setting is related to the partial. * * @since 4.5.0 * * @param {wp.customize.Value\|string} setting ID or object for setting. * @return {boolean} Whether the setting is related to the partial. / isRelatedSetting: function( setting /... newValue, oldValue / ) { var partial = this; if ( _.isString( setting ) ) { setting = api( setting ); } if ( ! setting ) { return false; } return -1 !== _.indexOf( partial.settings(), setting.id ); }, /* * Show the control to modify this partial's setting(s). * * This may be overridden for inline editing. * * @since 4.5.0 / showControl: function() { var partial = this, settingId = partial.params.primarySetting; if ( ! settingId ) { settingId = _.first( partial.settings() ); } if ( partial.getType() === 'nav_menu' ) { if ( partial.params.navMenuArgs.theme_location ) { settingId = 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']'; } else if ( partial.params.navMenuArgs.menu ) { settingId = 'nav_menu[' + String( partial.params.navMenuArgs.menu ) + ']'; } } api.preview.send( 'focus-control-for-setting', settingId ); }, /* * Prepare container for selective refresh. * * @since 4.5.0 * * @param {Placement} placement / preparePlacement: function( placement ) { $( placement.container ).addClass( 'customize-partial-refreshing' ); }, /* * Reference to the pending promise returned from self.requestPartial(). * * @since 4.5.0 * @private / _pendingRefreshPromise: null, /* * Request the new partial and render it into the placements. * * @since 4.5.0 * * @this {wp.customize.selectiveRefresh.Partial} * @return {jQuery.Promise} / refresh: function() { var partial = this, refreshPromise; refreshPromise = self.requestPartial( partial ); if ( ! partial._pendingRefreshPromise ) { _.each( partial.placements(), function( placement ) { partial.preparePlacement( placement ); } ); refreshPromise.done( function( placements ) { _.each( placements, function( placement ) { partial.renderContent( placement ); } ); } ); refreshPromise.fail( function( data, placements ) { partial.fallback( data, placements ); } ); // Allow new request when this one finishes. partial._pendingRefreshPromise = refreshPromise; refreshPromise.always( function() { partial._pendingRefreshPromise = null; } ); } return refreshPromise; }, /* * Apply the addedContent in the placement to the document. * * Note the placement object will have its container and removedNodes * properties updated. * * @since 4.5.0 * * @param {Placement} placement * @param {Element\|jQuery} [placement.container] - This param will be empty if there was no element matching the selector. * @param {string\|Object\|boolean} placement.addedContent - Rendered HTML content, a data object for JS templates to render, or false if no render. * @param {Object} [placement.context] - Optional context information about the container. * @return {boolean} Whether the rendering was successful and the fallback was not invoked. / renderContent: function( placement ) { var partial = this, content, newContainerElement; if ( ! placement.container ) { partial.fallback( new Error( 'no_container' ), [ placement ] ); return false; } placement.container = $( placement.container ); if ( false === placement.addedContent ) { partial.fallback( new Error( 'missing_render' ), [ placement ] ); return false; } // Currently a subclass needs to override renderContent to handle partials returning data object. if ( ! _.isString( placement.addedContent ) ) { partial.fallback( new Error( 'non_string_content' ), [ placement ] ); return false; } / jshint ignore:start / self.originalDocumentWrite = document.write; document.write = function() { throw new Error( self.data.l10n.badDocumentWrite ); }; / jshint ignore:end / try { content = placement.addedContent; if ( wp.emoji && wp.emoji.parse && ! $.contains( document.head, placement.container[0] ) ) { content = wp.emoji.parse( content ); } if ( partial.params.containerInclusive ) { // Note that content may be an empty string, and in this case jQuery will just remove the oldContainer. newContainerElement = $( content ); // Merge the new context on top of the old context. placement.context = _.extend( placement.context, newContainerElement.data( 'customize-partial-placement-context' ) \|\| {} ); newContainerElement.data( 'customize-partial-placement-context', placement.context ); placement.removedNodes = placement.container; placement.container = newContainerElement; placement.removedNodes.replaceWith( placement.container ); placement.container.attr( 'title', self.data.l10n.shiftClickToEdit ); } else { placement.removedNodes = document.createDocumentFragment(); while ( placement.container[0].firstChild ) { placement.removedNodes.appendChild( placement.container[0].firstChild ); } placement.container.html( content ); } placement.container.removeClass( 'customize-render-content-error' ); } catch ( error ) { if ( 'undefined' !== typeof console && console.error ) { console.error( partial.id, error ); } partial.fallback( error, [ placement ] ); } / jshint ignore:start / document.write = self.originalDocumentWrite; self.originalDocumentWrite = null; / jshint ignore:end / partial.createEditShortcutForPlacement( placement ); placement.container.removeClass( 'customize-partial-refreshing' ); // Prevent placement container from being re-triggered as being rendered among nested partials. placement.container.data( 'customize-partial-content-rendered', true ); / * Note that the 'wp_audio_shortcode_library' and 'wp_video_shortcode_library' filters * will determine whether or not wp.mediaelement is loaded and whether it will * initialize audio and video respectively. See also https://core.trac.wordpress.org/ticket/40144 / if ( wp.mediaelement ) { wp.mediaelement.initialize(); } if ( wp.playlist ) { wp.playlist.initialize(); } /* * Announce when a partial's placement has been rendered so that dynamic elements can be re-built. / self.trigger( 'partial-content-rendered', placement ); return true; }, /* * Handle fail to render partial. * * The first argument is either the failing jqXHR or an Error object, and the second argument is the array of containers. * * @since 4.5.0 / fallback: function() { var partial = this; if ( partial.params.fallbackRefresh ) { self.requestFullRefresh(); } } } ); /* * A Placement for a Partial. * * A partial placement is the actual physical representation of a partial for a given context. * It also may have information in relation to how a placement may have just changed. * The placement is conceptually similar to a DOM Range or MutationRecord. * * @memberOf wp.customize.selectiveRefresh * * @class Placement * @augments wp.customize.Class * @since 4.5.0 / self.Placement = Placement = api.Class.extend(/* @lends wp.customize.selectiveRefresh.prototype /{ /* * The partial with which the container is associated. * * @param {wp.customize.selectiveRefresh.Partial} / partial: null, /* * DOM element which contains the placement's contents. * * This will be null if the startNode and endNode do not point to the same * DOM element, such as in the case of a sidebar partial. * This container element itself will be replaced for partials that * have containerInclusive param defined as true. / container: null, /* * DOM node for the initial boundary of the placement. * * This will normally be the same as endNode since most placements appear as elements. * This is primarily useful for widget sidebars which do not have intrinsic containers, but * for which an HTML comment is output before to mark the starting position. / startNode: null, /* * DOM node for the terminal boundary of the placement. * * This will normally be the same as startNode since most placements appear as elements. * This is primarily useful for widget sidebars which do not have intrinsic containers, but * for which an HTML comment is output before to mark the ending position. / endNode: null, /* * Context data. * * This provides information about the placement which is included in the request * in order to render the partial properly. * * @param {object} / context: null, /* * The content for the partial when refreshed. * * @param {string} / addedContent: null, /* * DOM node(s) removed when the partial is refreshed. * * If the partial is containerInclusive, then the removedNodes will be * the single Element that was the partial's former placement. If the * partial is not containerInclusive, then the removedNodes will be a * documentFragment containing the nodes removed. * * @param {Element\|DocumentFragment} / removedNodes: null, /* * Constructor. * * @since 4.5.0 * * @param {Object} args * @param {Partial} args.partial * @param {jQuery\|Element} [args.container] * @param {Node} [args.startNode] * @param {Node} [args.endNode] * @param {Object} [args.context] * @param {string} [args.addedContent] * @param {jQuery\|DocumentFragment} [args.removedNodes] / initialize: function( args ) { var placement = this; args = _.extend( {}, args \|\| {} ); if ( ! args.partial \|\| ! args.partial.extended( Partial ) ) { throw new Error( 'Missing partial' ); } args.context = args.context \|\| {}; if ( args.container ) { args.container = $( args.container ); } _.extend( placement, args ); } }); /* * Mapping of type names to Partial constructor subclasses. * * @since 4.5.0 * * @type {Object.<string, wp.customize.selectiveRefresh.Partial>} / self.partialConstructor = {}; self.partial = new api.Values({ defaultConstructor: Partial }); /* * Get the POST vars for a Customizer preview request. * * @since 4.5.0 * @see wp.customize.previewer.query() * * @return {Object} / self.getCustomizeQuery = function() { var dirtyCustomized = {}; api.each( function( value, key ) { if ( value._dirty ) { dirtyCustomized[ key ] = value(); } } ); return { wp_customize: 'on', nonce: api.settings.nonce.preview, customize_theme: api.settings.theme.stylesheet, customized: JSON.stringify( dirtyCustomized ), customize_changeset_uuid: api.settings.changeset.uuid }; }; /* * Currently-requested partials and their associated deferreds. * * @since 4.5.0 * @type {Object<string, { deferred: jQuery.Promise, partial: wp.customize.selectiveRefresh.Partial }>} / self._pendingPartialRequests = {}; /* * Timeout ID for the current request, or null if no request is current. * * @since 4.5.0 * @type {number\|null} * @private / self._debouncedTimeoutId = null; /* * Current jqXHR for the request to the partials. * * @since 4.5.0 * @type {jQuery.jqXHR\|null} * @private / self._currentRequest = null; /* * Request full page refresh. * * When selective refresh is embedded in the context of front-end editing, this request * must fail or else changes will be lost, unless transactions are implemented. * * @since 4.5.0 / self.requestFullRefresh = function() { api.preview.send( 'refresh' ); }; /* * Request a re-rendering of a partial. * * @since 4.5.0 * * @param {wp.customize.selectiveRefresh.Partial} partial * @return {jQuery.Promise} / self.requestPartial = function( partial ) { var partialRequest; if ( self._debouncedTimeoutId ) { clearTimeout( self._debouncedTimeoutId ); self._debouncedTimeoutId = null; } if ( self._currentRequest ) { self._currentRequest.abort(); self._currentRequest = null; } partialRequest = self._pendingPartialRequests[ partial.id ]; if ( ! partialRequest \|\| 'pending' !== partialRequest.deferred.state() ) { partialRequest = { deferred: $.Deferred(), partial: partial }; self._pendingPartialRequests[ partial.id ] = partialRequest; } // Prevent leaking partial into debounced timeout callback. partial = null; self._debouncedTimeoutId = setTimeout( function() { var data, partialPlacementContexts, partialsPlacements, request; self._debouncedTimeoutId = null; data = self.getCustomizeQuery(); / * It is key that the containers be fetched exactly at the point of the request being * made, because the containers need to be mapped to responses by array indices. / partialsPlacements = {}; partialPlacementContexts = {}; _.each( self._pendingPartialRequests, function( pending, partialId ) { partialsPlacements[ partialId ] = pending.partial.placements(); if ( ! self.partial.has( partialId ) ) { pending.deferred.rejectWith( pending.partial, [ new Error( 'partial_removed' ), partialsPlacements[ partialId ] ] ); } else { / * Note that this may in fact be an empty array. In that case, it is the responsibility * of the Partial subclass instance to know where to inject the response, or else to * just issue a refresh (default behavior). The data being returned with each container * is the context information that may be needed to render certain partials, such as * the contained sidebar for rendering widgets or what the nav menu args are for a menu. / partialPlacementContexts[ partialId ] = _.map( partialsPlacements[ partialId ], function( placement ) { return placement.context \|\| {}; } ); } } ); data.partials = JSON.stringify( partialPlacementContexts ); data[ self.data.renderQueryVar ] = '1'; request = self._currentRequest = wp.ajax.send( null, { data: data, url: api.settings.url.self } ); request.done( function( data ) { /* * Announce the data returned from a request to render partials. * * The data is filtered on the server via customize_render_partials_response * so plugins can inject data from the server to be utilized * on the client via this event. Plugins may use this filter * to communicate script and style dependencies that need to get * injected into the page to support the rendered partials. * This is similar to the 'saved' event. / self.trigger( 'render-partials-response', data ); // Relay errors (warnings) captured during rendering and relay to console. if ( data.errors && 'undefined' !== typeof console && console.warn ) { _.each( data.errors, function( error ) { console.warn( error ); } ); } / * Note that data is an array of items that correspond to the array of * containers that were submitted in the request. So we zip up the * array of containers with the array of contents for those containers, * and send them into . / _.each( self._pendingPartialRequests, function( pending, partialId ) { var placementsContents; if ( ! _.isArray( data.contents[ partialId ] ) ) { pending.deferred.rejectWith( pending.partial, [ new Error( 'unrecognized_partial' ), partialsPlacements[ partialId ] ] ); } else { placementsContents = _.map( data.contents[ partialId ], function( content, i ) { var partialPlacement = partialsPlacements[ partialId ][ i ]; if ( partialPlacement ) { partialPlacement.addedContent = content; } else { partialPlacement = new Placement( { partial: pending.partial, addedContent: content } ); } return partialPlacement; } ); pending.deferred.resolveWith( pending.partial, [ placementsContents ] ); } } ); self._pendingPartialRequests = {}; } ); request.fail( function( data, statusText ) { / * Ignore failures caused by partial.currentRequest.abort() * The pending deferreds will remain in self._pendingPartialRequests * for re-use with the next request. / if ( 'abort' === statusText ) { return; } _.each( self._pendingPartialRequests, function( pending, partialId ) { pending.deferred.rejectWith( pending.partial, [ data, partialsPlacements[ partialId ] ] ); } ); self._pendingPartialRequests = {}; } ); }, api.settings.timeouts.selectiveRefresh ); return partialRequest.deferred.promise(); }; /* * Add partials for any nav menu container elements in the document. * * This method may be called multiple times. Containers that already have been * seen will be skipped. * * @since 4.5.0 * * @param {jQuery\|HTMLElement} [rootElement] * @param {object} [options] * @param {boolean=true} [options.triggerRendered] / self.addPartials = function( rootElement, options ) { var containerElements; if ( ! rootElement ) { rootElement = document.documentElement; } rootElement = $( rootElement ); options = _.extend( { triggerRendered: true }, options \|\| {} ); containerElements = rootElement.find( '[data-customize-partial-id]' ); if ( rootElement.is( '[data-customize-partial-id]' ) ) { containerElements = containerElements.add( rootElement ); } containerElements.each( function() { var containerElement = $( this ), partial, placement, id, Constructor, partialOptions, containerContext; id = containerElement.data( 'customize-partial-id' ); if ( ! id ) { return; } containerContext = containerElement.data( 'customize-partial-placement-context' ) \|\| {}; partial = self.partial( id ); if ( ! partial ) { partialOptions = containerElement.data( 'customize-partial-options' ) \|\| {}; partialOptions.constructingContainerContext = containerElement.data( 'customize-partial-placement-context' ) \|\| {}; Constructor = self.partialConstructor[ containerElement.data( 'customize-partial-type' ) ] \|\| self.Partial; partial = new Constructor( id, partialOptions ); self.partial.add( partial ); } / * Only trigger renders on (nested) partials that have been not been * handled yet. An example where this would apply is a nav menu * embedded inside of a navigation menu widget. When the widget's title * is updated, the entire widget will re-render and then the event * will be triggered for the nested nav menu to do any initialization. / if ( options.triggerRendered && ! containerElement.data( 'customize-partial-content-rendered' ) ) { placement = new Placement( { partial: partial, context: containerContext, container: containerElement } ); $( placement.container ).attr( 'title', self.data.l10n.shiftClickToEdit ); partial.createEditShortcutForPlacement( placement ); /* * Announce when a partial's nested placement has been re-rendered. / self.trigger( 'partial-content-rendered', placement ); } containerElement.data( 'customize-partial-content-rendered', true ); } ); }; api.bind( 'preview-ready', function() { var handleSettingChange, watchSettingChange, unwatchSettingChange; _.extend( self.data, _customizePartialRefreshExports ); // Create the partial JS models. _.each( self.data.partials, function( data, id ) { var Constructor, partial = self.partial( id ); if ( ! partial ) { Constructor = self.partialConstructor[ data.type ] \|\| self.Partial; partial = new Constructor( id, _.extend( { params: data }, data ) // Inclusion of params alias is for back-compat for custom partials that expect to augment this property. ); self.partial.add( partial ); } else { _.extend( partial.params, data ); } } ); /* * Handle change to a setting. * * Note this is largely needed because adding a 'change' event handler to wp.customize * will only include the changed setting object as an argument, not including the * new value or the old value. * * @since 4.5.0 * @this {wp.customize.Setting} * * @param {\|null} newValue New value, or null if the setting was just removed. @param {\|null} oldValue Old value, or null if the setting was just added. / handleSettingChange = function( newValue, oldValue ) { var setting = this; self.partial.each( function( partial ) { if ( partial.isRelatedSetting( setting, newValue, oldValue ) ) { partial.refresh(); } } ); }; /** * Trigger the initial change for the added setting, and watch for changes. * * @since 4.5.0 * @this {wp.customize.Values} * * @param {wp.customize.Setting} setting / watchSettingChange = function( setting ) { handleSettingChange.call( setting, setting(), null ); setting.bind( handleSettingChange ); }; /* * Trigger the final change for the removed setting, and unwatch for changes. * * @since 4.5.0 * @this {wp.customize.Values} * * @param {wp.customize.Setting} setting / unwatchSettingChange = function( setting ) { handleSettingChange.call( setting, null, setting() ); setting.unbind( handleSettingChange ); }; api.bind( 'add', watchSettingChange ); api.bind( 'remove', unwatchSettingChange ); api.each( function( setting ) { setting.bind( handleSettingChange ); } ); // Add (dynamic) initial partials that are declared via data- attributes. self.addPartials( document.documentElement, { triggerRendered: false } ); // Add new dynamic partials when the document changes. if ( 'undefined' !== typeof MutationObserver ) { self.mutationObserver = new MutationObserver( function( mutations ) { _.each( mutations, function( mutation ) { self.addPartials( $( mutation.target ) ); } ); } ); self.mutationObserver.observe( document.documentElement, { childList: true, subtree: true } ); } /** * Handle rendering of partials. * * @param {api.selectiveRefresh.Placement} placement / api.selectiveRefresh.bind( 'partial-content-rendered', function( placement ) { if ( placement.container ) { self.addPartials( placement.container ); } } ); /* * Handle setting validities in partial refresh response. * * @param {object} data Response data. * @param {object} data.setting_validities Setting validities. */ api.selectiveRefresh.bind( 'render-partials-response', function handleSettingValiditiesResponse( data ) { if ( data.setting_validities ) { api.preview.send( 'selective-refresh-setting-validities', data.setting_validities ); } } ); api.preview.bind( 'edit-shortcut-visibility', function( visibility ) { api.selectiveRefresh.editShortcutVisibility.set( visibility ); } ); api.selectiveRefresh.editShortcutVisibility.bind( function( visibility ) { var body = $( document.body ), shouldAnimateHide; shouldAnimateHide = ( 'hidden' === visibility && body.hasClass( 'customize-partial-edit-shortcuts-shown' ) && ! body.hasClass( 'customize-partial-edit-shortcuts-hidden' ) ); body.toggleClass( 'customize-partial-edit-shortcuts-hidden', shouldAnimateHide ); body.toggleClass( 'customize-partial-edit-shortcuts-shown', 'visible' === visibility ); } ); api.preview.bind( 'active', function() { // Make all partials ready. self.partial.each( function( partial ) { partial.deferred.ready.resolve(); } ); // Make all partials added henceforth as ready upon add. self.partial.bind( 'add', function( partial ) { partial.deferred.ready.resolve(); } ); } ); } ); return self; }( jQuery, wp.customize ) ); Back

Edit File : customize-selective-refresh.js | Size : 32.55 KB

/**
 * @output wp-includes/js/customize-selective-refresh.js
 */

/* global jQuery, JSON, _customizePartialRefreshExports, console */

/** @namespace wp.customize.selectiveRefresh */
wp.customize.selectiveRefresh = ( function( $, api ) {
	'use strict';
	var self, Partial, Placement;

self = {
		ready: $.Deferred(),
		editShortcutVisibility: new api.Value(),
		data: {
			partials: {},
			renderQueryVar: '',
			l10n: {
				shiftClickToEdit: ''
			}
		},
		currentRequest: null
	};

_.extend( self, api.Events );

/**
	 * A Customizer Partial.
	 *
	 * A partial provides a rendering of one or more settings according to a template.
	 *
	 * @memberOf wp.customize.selectiveRefresh
	 *
	 * @see PHP class WP_Customize_Partial.
	 *
	 * @class
	 * @augments wp.customize.Class
	 * @since 4.5.0
	 */
	Partial = self.Partial = api.Class.extend(/** @lends wp.customize.SelectiveRefresh.Partial.prototype */{

id: null,

/**
		 * Default params.
		 *
		 * @since 4.9.0
		 * @var {object}
		 */
		defaults: {
			selector: null,
			primarySetting: null,
			containerInclusive: false,
			fallbackRefresh: true // Note this needs to be false in a front-end editing context.
		},

/**
		 * Constructor.
		 *
		 * @since 4.5.0
		 *
		 * @param {string}  id                      - Unique identifier for the partial instance.
		 * @param {Object}  options                 - Options hash for the partial instance.
		 * @param {string}  options.type            - Type of partial (e.g. nav_menu, widget, etc)
		 * @param {string}  options.selector        - jQuery selector to find the container element in the page.
		 * @param {Array}   options.settings        - The IDs for the settings the partial relates to.
		 * @param {string}  options.primarySetting  - The ID for the primary setting the partial renders.
		 * @param {boolean} options.fallbackRefresh - Whether to refresh the entire preview in case of a partial refresh failure.
		 * @param {Object}  [options.params]        - Deprecated wrapper for the above properties.
		 */
		initialize: function( id, options ) {
			var partial = this;
			options = options || {};
			partial.id = id;

partial.params = _.extend(
				{
					settings: []
				},
				partial.defaults,
				options.params || options
			);

partial.deferred = {};
			partial.deferred.ready = $.Deferred();

partial.deferred.ready.done( function() {
				partial.ready();
			} );
		},

/**
		 * Set up the partial.
		 *
		 * @since 4.5.0
		 */
		ready: function() {
			var partial = this;
			_.each( partial.placements(), function( placement ) {
				$( placement.container ).attr( 'title', self.data.l10n.shiftClickToEdit );
				partial.createEditShortcutForPlacement( placement );
			} );
			$( document ).on( 'click', partial.params.selector, function( e ) {
				if ( ! e.shiftKey ) {
					return;
				}
				e.preventDefault();
				_.each( partial.placements(), function( placement ) {
					if ( $( placement.container ).is( e.currentTarget ) ) {
						partial.showControl();
					}
				} );
			} );
		},

/**
		 * Create and show the edit shortcut for a given partial placement container.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @param {Placement} placement The placement container element.
		 * @return {void}
		 */
		createEditShortcutForPlacement: function( placement ) {
			var partial = this, $shortcut, $placementContainer, illegalAncestorSelector, illegalContainerSelector;
			if ( ! placement.container ) {
				return;
			}
			$placementContainer = $( placement.container );
			illegalAncestorSelector = 'head';
			illegalContainerSelector = 'area, audio, base, bdi, bdo, br, button, canvas, col, colgroup, command, datalist, embed, head, hr, html, iframe, img, input, keygen, label, link, map, math, menu, meta, noscript, object, optgroup, option, param, progress, rp, rt, ruby, script, select, source, style, svg, table, tbody, textarea, tfoot, thead, title, tr, track, video, wbr';
			if ( ! $placementContainer.length || $placementContainer.is( illegalContainerSelector ) || $placementContainer.closest( illegalAncestorSelector ).length ) {
				return;
			}
			$shortcut = partial.createEditShortcut();
			$shortcut.on( 'click', function( event ) {
				event.preventDefault();
				event.stopPropagation();
				partial.showControl();
			} );
			partial.addEditShortcutToPlacement( placement, $shortcut );
		},

/**
		 * Add an edit shortcut to the placement container.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @param {Placement} placement The placement for the partial.
		 * @param {jQuery} $editShortcut The shortcut element as a jQuery object.
		 * @return {void}
		 */
		addEditShortcutToPlacement: function( placement, $editShortcut ) {
			var $placementContainer = $( placement.container );
			$placementContainer.prepend( $editShortcut );
			if ( ! $placementContainer.is( ':visible' ) || 'none' === $placementContainer.css( 'display' ) ) {
				$editShortcut.addClass( 'customize-partial-edit-shortcut-hidden' );
			}
		},

/**
		 * Return the unique class name for the edit shortcut button for this partial.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Partial ID converted into a class name for use in shortcut.
		 */
		getEditShortcutClassName: function() {
			var partial = this, cleanId;
			cleanId = partial.id.replace( /]/g, '' ).replace( /\[/g, '-' );
			return 'customize-partial-edit-shortcut-' + cleanId;
		},

/**
		 * Return the appropriate translated string for the edit shortcut button.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Tooltip for edit shortcut.
		 */
		getEditShortcutTitle: function() {
			var partial = this, l10n = self.data.l10n;
			switch ( partial.getType() ) {
				case 'widget':
					return l10n.clickEditWidget;
				case 'blogname':
					return l10n.clickEditTitle;
				case 'blogdescription':
					return l10n.clickEditTitle;
				case 'nav_menu':
					return l10n.clickEditMenu;
				default:
					return l10n.clickEditMisc;
			}
		},

/**
		 * Return the type of this partial
		 *
		 * Will use `params.type` if set, but otherwise will try to infer type from settingId.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Type of partial derived from type param or the related setting ID.
		 */
		getType: function() {
			var partial = this, settingId;
			settingId = partial.params.primarySetting || _.first( partial.settings() ) || 'unknown';
			if ( partial.params.type ) {
				return partial.params.type;
			}
			if ( settingId.match( /^nav_menu_instance\[/ ) ) {
				return 'nav_menu';
			}
			if ( settingId.match( /^widget_.+\[\d+]$/ ) ) {
				return 'widget';
			}
			return settingId;
		},

/**
		 * Create an edit shortcut button for this partial.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {jQuery} The edit shortcut button element.
		 */
		createEditShortcut: function() {
			var partial = this, shortcutTitle, $buttonContainer, $button, $image;
			shortcutTitle = partial.getEditShortcutTitle();
			$buttonContainer = $( '<span>', {
				'class': 'customize-partial-edit-shortcut ' + partial.getEditShortcutClassName()
			} );
			$button = $( '<button>', {
				'aria-label': shortcutTitle,
				'title': shortcutTitle,
				'class': 'customize-partial-edit-shortcut-button'
			} );
			$image = $( '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M13.89 3.39l2.71 2.72c.46.46.42 1.24.03 1.64l-8.01 8.02-5.56 1.16 1.16-5.58s7.6-7.63 7.99-8.03c.39-.39 1.22-.39 1.68.07zm-2.73 2.79l-5.59 5.61 1.11 1.11 5.54-5.65zm-2.97 8.23l5.58-5.6-1.07-1.08-5.59 5.6z"/></svg>' );
			$button.append( $image );
			$buttonContainer.append( $button );
			return $buttonContainer;
		},

/**
		 * Find all placements for this partial in the document.
		 *
		 * @since 4.5.0
		 *
		 * @return {Array.<Placement>}
		 */
		placements: function() {
			var partial = this, selector;

selector = partial.params.selector || '';
			if ( selector ) {
				selector += ', ';
			}
			selector += '[data-customize-partial-id="' + partial.id + '"]'; // @todo Consider injecting customize-partial-id-${id} classnames instead.

return $( selector ).map( function() {
				var container = $( this ), context;

context = container.data( 'customize-partial-placement-context' );
				if ( _.isString( context ) && '{' === context.substr( 0, 1 ) ) {
					throw new Error( 'context JSON parse error' );
				}

return new Placement( {
					partial: partial,
					container: container,
					context: context
				} );
			} ).get();
		},

/**
		 * Get list of setting IDs related to this partial.
		 *
		 * @since 4.5.0
		 *
		 * @return {string[]}
		 */
		settings: function() {
			var partial = this;
			if ( partial.params.settings && 0 !== partial.params.settings.length ) {
				return partial.params.settings;
			} else if ( partial.params.primarySetting ) {
				return [ partial.params.primarySetting ];
			} else {
				return [ partial.id ];
			}
		},

/**
		 * Return whether the setting is related to the partial.
		 *
		 * @since 4.5.0
		 *
		 * @param {wp.customize.Value|string} setting  ID or object for setting.
		 * @return {boolean} Whether the setting is related to the partial.
		 */
		isRelatedSetting: function( setting /*... newValue, oldValue */ ) {
			var partial = this;
			if ( _.isString( setting ) ) {
				setting = api( setting );
			}
			if ( ! setting ) {
				return false;
			}
			return -1 !== _.indexOf( partial.settings(), setting.id );
		},

/**
		 * Show the control to modify this partial's setting(s).
		 *
		 * This may be overridden for inline editing.
		 *
		 * @since 4.5.0
		 */
		showControl: function() {
			var partial = this, settingId = partial.params.primarySetting;
			if ( ! settingId ) {
				settingId = _.first( partial.settings() );
			}
			if ( partial.getType() === 'nav_menu' ) {
				if ( partial.params.navMenuArgs.theme_location ) {
					settingId = 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']';
				} else if ( partial.params.navMenuArgs.menu )   {
					settingId = 'nav_menu[' + String( partial.params.navMenuArgs.menu ) + ']';
				}
			}
			api.preview.send( 'focus-control-for-setting', settingId );
		},

/**
		 * Prepare container for selective refresh.
		 *
		 * @since 4.5.0
		 *
		 * @param {Placement} placement
		 */
		preparePlacement: function( placement ) {
			$( placement.container ).addClass( 'customize-partial-refreshing' );
		},

/**
		 * Reference to the pending promise returned from self.requestPartial().
		 *
		 * @since 4.5.0
		 * @private
		 */
		_pendingRefreshPromise: null,

/**
		 * Request the new partial and render it into the placements.
		 *
		 * @since 4.5.0
		 *
		 * @this {wp.customize.selectiveRefresh.Partial}
		 * @return {jQuery.Promise}
		 */
		refresh: function() {
			var partial = this, refreshPromise;

refreshPromise = self.requestPartial( partial );

if ( ! partial._pendingRefreshPromise ) {
				_.each( partial.placements(), function( placement ) {
					partial.preparePlacement( placement );
				} );

refreshPromise.done( function( placements ) {
					_.each( placements, function( placement ) {
						partial.renderContent( placement );
					} );
				} );

refreshPromise.fail( function( data, placements ) {
					partial.fallback( data, placements );
				} );

// Allow new request when this one finishes.
				partial._pendingRefreshPromise = refreshPromise;
				refreshPromise.always( function() {
					partial._pendingRefreshPromise = null;
				} );
			}

return refreshPromise;
		},

/**
		 * Apply the addedContent in the placement to the document.
		 *
		 * Note the placement object will have its container and removedNodes
		 * properties updated.
		 *
		 * @since 4.5.0
		 *
		 * @param {Placement}             placement
		 * @param {Element|jQuery}        [placement.container]  - This param will be empty if there was no element matching the selector.
		 * @param {string|Object|boolean} placement.addedContent - Rendered HTML content, a data object for JS templates to render, or false if no render.
		 * @param {Object}                [placement.context]    - Optional context information about the container.
		 * @return {boolean} Whether the rendering was successful and the fallback was not invoked.
		 */
		renderContent: function( placement ) {
			var partial = this, content, newContainerElement;
			if ( ! placement.container ) {
				partial.fallback( new Error( 'no_container' ), [ placement ] );
				return false;
			}
			placement.container = $( placement.container );
			if ( false === placement.addedContent ) {
				partial.fallback( new Error( 'missing_render' ), [ placement ] );
				return false;
			}

// Currently a subclass needs to override renderContent to handle partials returning data object.
			if ( ! _.isString( placement.addedContent ) ) {
				partial.fallback( new Error( 'non_string_content' ), [ placement ] );
				return false;
			}

/* jshint ignore:start */
			self.originalDocumentWrite = document.write;
			document.write = function() {
				throw new Error( self.data.l10n.badDocumentWrite );
			};
			/* jshint ignore:end */
			try {
				content = placement.addedContent;
				if ( wp.emoji && wp.emoji.parse && ! $.contains( document.head, placement.container[0] ) ) {
					content = wp.emoji.parse( content );
				}

if ( partial.params.containerInclusive ) {

// Note that content may be an empty string, and in this case jQuery will just remove the oldContainer.
					newContainerElement = $( content );

// Merge the new context on top of the old context.
					placement.context = _.extend(
						placement.context,
						newContainerElement.data( 'customize-partial-placement-context' ) || {}
					);
					newContainerElement.data( 'customize-partial-placement-context', placement.context );

placement.removedNodes = placement.container;
					placement.container = newContainerElement;
					placement.removedNodes.replaceWith( placement.container );
					placement.container.attr( 'title', self.data.l10n.shiftClickToEdit );
				} else {
					placement.removedNodes = document.createDocumentFragment();
					while ( placement.container[0].firstChild ) {
						placement.removedNodes.appendChild( placement.container[0].firstChild );
					}

placement.container.html( content );
				}

placement.container.removeClass( 'customize-render-content-error' );
			} catch ( error ) {
				if ( 'undefined' !== typeof console && console.error ) {
					console.error( partial.id, error );
				}
				partial.fallback( error, [ placement ] );
			}
			/* jshint ignore:start */
			document.write = self.originalDocumentWrite;
			self.originalDocumentWrite = null;
			/* jshint ignore:end */

partial.createEditShortcutForPlacement( placement );
			placement.container.removeClass( 'customize-partial-refreshing' );

// Prevent placement container from being re-triggered as being rendered among nested partials.
			placement.container.data( 'customize-partial-content-rendered', true );

/*
			 * Note that the 'wp_audio_shortcode_library' and 'wp_video_shortcode_library' filters
			 * will determine whether or not wp.mediaelement is loaded and whether it will
			 * initialize audio and video respectively. See also https://core.trac.wordpress.org/ticket/40144
			 */
			if ( wp.mediaelement ) {
				wp.mediaelement.initialize();
			}

if ( wp.playlist ) {
				wp.playlist.initialize();
			}

/**
			 * Announce when a partial's placement has been rendered so that dynamic elements can be re-built.
			 */
			self.trigger( 'partial-content-rendered', placement );
			return true;
		},

/**
		 * Handle fail to render partial.
		 *
		 * The first argument is either the failing jqXHR or an Error object, and the second argument is the array of containers.
		 *
		 * @since 4.5.0
		 */
		fallback: function() {
			var partial = this;
			if ( partial.params.fallbackRefresh ) {
				self.requestFullRefresh();
			}
		}
	} );

/**
	 * A Placement for a Partial.
	 *
	 * A partial placement is the actual physical representation of a partial for a given context.
	 * It also may have information in relation to how a placement may have just changed.
	 * The placement is conceptually similar to a DOM Range or MutationRecord.
	 *
	 * @memberOf wp.customize.selectiveRefresh
	 *
	 * @class Placement
	 * @augments wp.customize.Class
	 * @since 4.5.0
	 */
	self.Placement = Placement = api.Class.extend(/** @lends wp.customize.selectiveRefresh.prototype */{

/**
		 * The partial with which the container is associated.
		 *
		 * @param {wp.customize.selectiveRefresh.Partial}
		 */
		partial: null,

/**
		 * DOM element which contains the placement's contents.
		 *
		 * This will be null if the startNode and endNode do not point to the same
		 * DOM element, such as in the case of a sidebar partial.
		 * This container element itself will be replaced for partials that
		 * have containerInclusive param defined as true.
		 */
		container: null,

/**
		 * DOM node for the initial boundary of the placement.
		 *
		 * This will normally be the same as endNode since most placements appear as elements.
		 * This is primarily useful for widget sidebars which do not have intrinsic containers, but
		 * for which an HTML comment is output before to mark the starting position.
		 */
		startNode: null,

/**
		 * DOM node for the terminal boundary of the placement.
		 *
		 * This will normally be the same as startNode since most placements appear as elements.
		 * This is primarily useful for widget sidebars which do not have intrinsic containers, but
		 * for which an HTML comment is output before to mark the ending position.
		 */
		endNode: null,

/**
		 * Context data.
		 *
		 * This provides information about the placement which is included in the request
		 * in order to render the partial properly.
		 *
		 * @param {object}
		 */
		context: null,

/**
		 * The content for the partial when refreshed.
		 *
		 * @param {string}
		 */
		addedContent: null,

/**
		 * DOM node(s) removed when the partial is refreshed.
		 *
		 * If the partial is containerInclusive, then the removedNodes will be
		 * the single Element that was the partial's former placement. If the
		 * partial is not containerInclusive, then the removedNodes will be a
		 * documentFragment containing the nodes removed.
		 *
		 * @param {Element|DocumentFragment}
		 */
		removedNodes: null,

/**
		 * Constructor.
		 *
		 * @since 4.5.0
		 *
		 * @param {Object}                   args
		 * @param {Partial}                  args.partial
		 * @param {jQuery|Element}           [args.container]
		 * @param {Node}                     [args.startNode]
		 * @param {Node}                     [args.endNode]
		 * @param {Object}                   [args.context]
		 * @param {string}                   [args.addedContent]
		 * @param {jQuery|DocumentFragment}  [args.removedNodes]
		 */
		initialize: function( args ) {
			var placement = this;

args = _.extend( {}, args || {} );
			if ( ! args.partial || ! args.partial.extended( Partial ) ) {
				throw new Error( 'Missing partial' );
			}
			args.context = args.context || {};
			if ( args.container ) {
				args.container = $( args.container );
			}

_.extend( placement, args );
		}

});

/**
	 * Mapping of type names to Partial constructor subclasses.
	 *
	 * @since 4.5.0
	 *
	 * @type {Object.<string, wp.customize.selectiveRefresh.Partial>}
	 */
	self.partialConstructor = {};

self.partial = new api.Values({ defaultConstructor: Partial });

/**
	 * Get the POST vars for a Customizer preview request.
	 *
	 * @since 4.5.0
	 * @see wp.customize.previewer.query()
	 *
	 * @return {Object}
	 */
	self.getCustomizeQuery = function() {
		var dirtyCustomized = {};
		api.each( function( value, key ) {
			if ( value._dirty ) {
				dirtyCustomized[ key ] = value();
			}
		} );

return {
			wp_customize: 'on',
			nonce: api.settings.nonce.preview,
			customize_theme: api.settings.theme.stylesheet,
			customized: JSON.stringify( dirtyCustomized ),
			customize_changeset_uuid: api.settings.changeset.uuid
		};
	};

/**
	 * Currently-requested partials and their associated deferreds.
	 *
	 * @since 4.5.0
	 * @type {Object<string, { deferred: jQuery.Promise, partial: wp.customize.selectiveRefresh.Partial }>}
	 */
	self._pendingPartialRequests = {};

/**
	 * Timeout ID for the current request, or null if no request is current.
	 *
	 * @since 4.5.0
	 * @type {number|null}
	 * @private
	 */
	self._debouncedTimeoutId = null;

/**
	 * Current jqXHR for the request to the partials.
	 *
	 * @since 4.5.0
	 * @type {jQuery.jqXHR|null}
	 * @private
	 */
	self._currentRequest = null;

/**
	 * Request full page refresh.
	 *
	 * When selective refresh is embedded in the context of front-end editing, this request
	 * must fail or else changes will be lost, unless transactions are implemented.
	 *
	 * @since 4.5.0
	 */
	self.requestFullRefresh = function() {
		api.preview.send( 'refresh' );
	};

/**
	 * Request a re-rendering of a partial.
	 *
	 * @since 4.5.0
	 *
	 * @param {wp.customize.selectiveRefresh.Partial} partial
	 * @return {jQuery.Promise}
	 */
	self.requestPartial = function( partial ) {
		var partialRequest;

if ( self._debouncedTimeoutId ) {
			clearTimeout( self._debouncedTimeoutId );
			self._debouncedTimeoutId = null;
		}
		if ( self._currentRequest ) {
			self._currentRequest.abort();
			self._currentRequest = null;
		}

partialRequest = self._pendingPartialRequests[ partial.id ];
		if ( ! partialRequest || 'pending' !== partialRequest.deferred.state() ) {
			partialRequest = {
				deferred: $.Deferred(),
				partial: partial
			};
			self._pendingPartialRequests[ partial.id ] = partialRequest;
		}

// Prevent leaking partial into debounced timeout callback.
		partial = null;

self._debouncedTimeoutId = setTimeout(
			function() {
				var data, partialPlacementContexts, partialsPlacements, request;

self._debouncedTimeoutId = null;
				data = self.getCustomizeQuery();

/*
				 * It is key that the containers be fetched exactly at the point of the request being
				 * made, because the containers need to be mapped to responses by array indices.
				 */
				partialsPlacements = {};

partialPlacementContexts = {};

_.each( self._pendingPartialRequests, function( pending, partialId ) {
					partialsPlacements[ partialId ] = pending.partial.placements();
					if ( ! self.partial.has( partialId ) ) {
						pending.deferred.rejectWith( pending.partial, [ new Error( 'partial_removed' ), partialsPlacements[ partialId ] ] );
					} else {
						/*
						 * Note that this may in fact be an empty array. In that case, it is the responsibility
						 * of the Partial subclass instance to know where to inject the response, or else to
						 * just issue a refresh (default behavior). The data being returned with each container
						 * is the context information that may be needed to render certain partials, such as
						 * the contained sidebar for rendering widgets or what the nav menu args are for a menu.
						 */
						partialPlacementContexts[ partialId ] = _.map( partialsPlacements[ partialId ], function( placement ) {
							return placement.context || {};
						} );
					}
				} );

data.partials = JSON.stringify( partialPlacementContexts );
				data[ self.data.renderQueryVar ] = '1';

request = self._currentRequest = wp.ajax.send( null, {
					data: data,
					url: api.settings.url.self
				} );

request.done( function( data ) {

/**
					 * Announce the data returned from a request to render partials.
					 *
					 * The data is filtered on the server via customize_render_partials_response
					 * so plugins can inject data from the server to be utilized
					 * on the client via this event. Plugins may use this filter
					 * to communicate script and style dependencies that need to get
					 * injected into the page to support the rendered partials.
					 * This is similar to the 'saved' event.
					 */
					self.trigger( 'render-partials-response', data );

// Relay errors (warnings) captured during rendering and relay to console.
					if ( data.errors && 'undefined' !== typeof console && console.warn ) {
						_.each( data.errors, function( error ) {
							console.warn( error );
						} );
					}

/*
					 * Note that data is an array of items that correspond to the array of
					 * containers that were submitted in the request. So we zip up the
					 * array of containers with the array of contents for those containers,
					 * and send them into .
					 */
					_.each( self._pendingPartialRequests, function( pending, partialId ) {
						var placementsContents;
						if ( ! _.isArray( data.contents[ partialId ] ) ) {
							pending.deferred.rejectWith( pending.partial, [ new Error( 'unrecognized_partial' ), partialsPlacements[ partialId ] ] );
						} else {
							placementsContents = _.map( data.contents[ partialId ], function( content, i ) {
								var partialPlacement = partialsPlacements[ partialId ][ i ];
								if ( partialPlacement ) {
									partialPlacement.addedContent = content;
								} else {
									partialPlacement = new Placement( {
										partial: pending.partial,
										addedContent: content
									} );
								}
								return partialPlacement;
							} );
							pending.deferred.resolveWith( pending.partial, [ placementsContents ] );
						}
					} );
					self._pendingPartialRequests = {};
				} );

request.fail( function( data, statusText ) {

/*
					 * Ignore failures caused by partial.currentRequest.abort()
					 * The pending deferreds will remain in self._pendingPartialRequests
					 * for re-use with the next request.
					 */
					if ( 'abort' === statusText ) {
						return;
					}

_.each( self._pendingPartialRequests, function( pending, partialId ) {
						pending.deferred.rejectWith( pending.partial, [ data, partialsPlacements[ partialId ] ] );
					} );
					self._pendingPartialRequests = {};
				} );
			},
			api.settings.timeouts.selectiveRefresh
		);

return partialRequest.deferred.promise();
	};

/**
	 * Add partials for any nav menu container elements in the document.
	 *
	 * This method may be called multiple times. Containers that already have been
	 * seen will be skipped.
	 *
	 * @since 4.5.0
	 *
	 * @param {jQuery|HTMLElement} [rootElement]
	 * @param {object}             [options]
	 * @param {boolean=true}       [options.triggerRendered]
	 */
	self.addPartials = function( rootElement, options ) {
		var containerElements;
		if ( ! rootElement ) {
			rootElement = document.documentElement;
		}
		rootElement = $( rootElement );
		options = _.extend(
			{
				triggerRendered: true
			},
			options || {}
		);

containerElements = rootElement.find( '[data-customize-partial-id]' );
		if ( rootElement.is( '[data-customize-partial-id]' ) ) {
			containerElements = containerElements.add( rootElement );
		}
		containerElements.each( function() {
			var containerElement = $( this ), partial, placement, id, Constructor, partialOptions, containerContext;
			id = containerElement.data( 'customize-partial-id' );
			if ( ! id ) {
				return;
			}
			containerContext = containerElement.data( 'customize-partial-placement-context' ) || {};

partial = self.partial( id );
			if ( ! partial ) {
				partialOptions = containerElement.data( 'customize-partial-options' ) || {};
				partialOptions.constructingContainerContext = containerElement.data( 'customize-partial-placement-context' ) || {};
				Constructor = self.partialConstructor[ containerElement.data( 'customize-partial-type' ) ] || self.Partial;
				partial = new Constructor( id, partialOptions );
				self.partial.add( partial );
			}

/*
			 * Only trigger renders on (nested) partials that have been not been
			 * handled yet. An example where this would apply is a nav menu
			 * embedded inside of a navigation menu widget. When the widget's title
			 * is updated, the entire widget will re-render and then the event
			 * will be triggered for the nested nav menu to do any initialization.
			 */
			if ( options.triggerRendered && ! containerElement.data( 'customize-partial-content-rendered' ) ) {

placement = new Placement( {
					partial: partial,
					context: containerContext,
					container: containerElement
				} );

$( placement.container ).attr( 'title', self.data.l10n.shiftClickToEdit );
				partial.createEditShortcutForPlacement( placement );

/**
				 * Announce when a partial's nested placement has been re-rendered.
				 */
				self.trigger( 'partial-content-rendered', placement );
			}
			containerElement.data( 'customize-partial-content-rendered', true );
		} );
	};

api.bind( 'preview-ready', function() {
		var handleSettingChange, watchSettingChange, unwatchSettingChange;

_.extend( self.data, _customizePartialRefreshExports );

// Create the partial JS models.
		_.each( self.data.partials, function( data, id ) {
			var Constructor, partial = self.partial( id );
			if ( ! partial ) {
				Constructor = self.partialConstructor[ data.type ] || self.Partial;
				partial = new Constructor(
					id,
					_.extend( { params: data }, data ) // Inclusion of params alias is for back-compat for custom partials that expect to augment this property.
				);
				self.partial.add( partial );
			} else {
				_.extend( partial.params, data );
			}
		} );

/**
		 * Handle change to a setting.
		 *
		 * Note this is largely needed because adding a 'change' event handler to wp.customize
		 * will only include the changed setting object as an argument, not including the
		 * new value or the old value.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Setting}
		 *
		 * @param {*|null} newValue New value, or null if the setting was just removed.
		 * @param {*|null} oldValue Old value, or null if the setting was just added.
		 */
		handleSettingChange = function( newValue, oldValue ) {
			var setting = this;
			self.partial.each( function( partial ) {
				if ( partial.isRelatedSetting( setting, newValue, oldValue ) ) {
					partial.refresh();
				}
			} );
		};

/**
		 * Trigger the initial change for the added setting, and watch for changes.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Values}
		 *
		 * @param {wp.customize.Setting} setting
		 */
		watchSettingChange = function( setting ) {
			handleSettingChange.call( setting, setting(), null );
			setting.bind( handleSettingChange );
		};

/**
		 * Trigger the final change for the removed setting, and unwatch for changes.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Values}
		 *
		 * @param {wp.customize.Setting} setting
		 */
		unwatchSettingChange = function( setting ) {
			handleSettingChange.call( setting, null, setting() );
			setting.unbind( handleSettingChange );
		};

api.bind( 'add', watchSettingChange );
		api.bind( 'remove', unwatchSettingChange );
		api.each( function( setting ) {
			setting.bind( handleSettingChange );
		} );

// Add (dynamic) initial partials that are declared via data-* attributes.
		self.addPartials( document.documentElement, {
			triggerRendered: false
		} );

// Add new dynamic partials when the document changes.
		if ( 'undefined' !== typeof MutationObserver ) {
			self.mutationObserver = new MutationObserver( function( mutations ) {
				_.each( mutations, function( mutation ) {
					self.addPartials( $( mutation.target ) );
				} );
			} );
			self.mutationObserver.observe( document.documentElement, {
				childList: true,
				subtree: true
			} );
		}

/**
		 * Handle rendering of partials.
		 *
		 * @param {api.selectiveRefresh.Placement} placement
		 */
		api.selectiveRefresh.bind( 'partial-content-rendered', function( placement ) {
			if ( placement.container ) {
				self.addPartials( placement.container );
			}
		} );

/**
		 * Handle setting validities in partial refresh response.
		 *
		 * @param {object} data Response data.
		 * @param {object} data.setting_validities Setting validities.
		 */
		api.selectiveRefresh.bind( 'render-partials-response', function handleSettingValiditiesResponse( data ) {
			if ( data.setting_validities ) {
				api.preview.send( 'selective-refresh-setting-validities', data.setting_validities );
			}
		} );

api.preview.bind( 'edit-shortcut-visibility', function( visibility ) {
			api.selectiveRefresh.editShortcutVisibility.set( visibility );
		} );
		api.selectiveRefresh.editShortcutVisibility.bind( function( visibility ) {
			var body = $( document.body ), shouldAnimateHide;

shouldAnimateHide = ( 'hidden' === visibility && body.hasClass( 'customize-partial-edit-shortcuts-shown' ) && ! body.hasClass( 'customize-partial-edit-shortcuts-hidden' ) );
			body.toggleClass( 'customize-partial-edit-shortcuts-hidden', shouldAnimateHide );
			body.toggleClass( 'customize-partial-edit-shortcuts-shown', 'visible' === visibility );
		} );

api.preview.bind( 'active', function() {

// Make all partials ready.
			self.partial.each( function( partial ) {
				partial.deferred.ready.resolve();
			} );

// Make all partials added henceforth as ready upon add.
			self.partial.bind( 'add', function( partial ) {
				partial.deferred.ready.resolve();
			} );
		} );

} );

return self;
}( jQuery, wp.customize ) );

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