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Edit File : media-widgets.js \| Size : 41.72 KB
/** * @output wp-admin/js/widgets/media-widgets.js / / eslint consistent-this: [ "error", "control" ] / /* * @namespace wp.mediaWidgets * @memberOf wp / wp.mediaWidgets = ( function( $ ) { 'use strict'; var component = {}; /* * Widget control (view) constructors, mapping widget id_base to subclass of MediaWidgetControl. * * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base. * * @memberOf wp.mediaWidgets * * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>} / component.controlConstructors = {}; /* * Widget model constructors, mapping widget id_base to subclass of MediaWidgetModel. * * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base. * * @memberOf wp.mediaWidgets * * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>} / component.modelConstructors = {}; component.PersistentDisplaySettingsLibrary = wp.media.controller.Library.extend(/* @lends wp.mediaWidgets.PersistentDisplaySettingsLibrary.prototype /{ /* * Library which persists the customized display settings across selections. * * @constructs wp.mediaWidgets.PersistentDisplaySettingsLibrary * @augments wp.media.controller.Library * * @param {Object} options - Options. * * @return {void} / initialize: function initialize( options ) { _.bindAll( this, 'handleDisplaySettingChange' ); wp.media.controller.Library.prototype.initialize.call( this, options ); }, /* * Sync changes to the current display settings back into the current customized. * * @param {Backbone.Model} displaySettings - Modified display settings. * @return {void} / handleDisplaySettingChange: function handleDisplaySettingChange( displaySettings ) { this.get( 'selectedDisplaySettings' ).set( displaySettings.attributes ); }, /* * Get the display settings model. * * Model returned is updated with the current customized display settings, * and an event listener is added so that changes made to the settings * will sync back into the model storing the session's customized display * settings. * * @param {Backbone.Model} model - Display settings model. * @return {Backbone.Model} Display settings model. / display: function getDisplaySettingsModel( model ) { var display, selectedDisplaySettings = this.get( 'selectedDisplaySettings' ); display = wp.media.controller.Library.prototype.display.call( this, model ); display.off( 'change', this.handleDisplaySettingChange ); // Prevent duplicated event handlers. display.set( selectedDisplaySettings.attributes ); if ( 'custom' === selectedDisplaySettings.get( 'link_type' ) ) { display.linkUrl = selectedDisplaySettings.get( 'link_url' ); } display.on( 'change', this.handleDisplaySettingChange ); return display; } }); /* * Extended view for managing the embed UI. * * @class wp.mediaWidgets.MediaEmbedView * @augments wp.media.view.Embed / component.MediaEmbedView = wp.media.view.Embed.extend(/* @lends wp.mediaWidgets.MediaEmbedView.prototype /{ /* * Initialize. * * @since 4.9.0 * * @param {Object} options - Options. * @return {void} / initialize: function( options ) { var view = this, embedController; // eslint-disable-line consistent-this wp.media.view.Embed.prototype.initialize.call( view, options ); if ( 'image' !== view.controller.options.mimeType ) { embedController = view.controller.states.get( 'embed' ); embedController.off( 'scan', embedController.scanImage, embedController ); } }, /* * Refresh embed view. * * Forked override of {wp.media.view.Embed#refresh()} to suppress irrelevant "link text" field. * * @return {void} / refresh: function refresh() { /* * @class wp.mediaWidgets~Constructor / var Constructor; if ( 'image' === this.controller.options.mimeType ) { Constructor = wp.media.view.EmbedImage; } else { // This should be eliminated once #40450 lands of when this is merged into core. Constructor = wp.media.view.EmbedLink.extend(/* @lends wp.mediaWidgets~Constructor.prototype /{ /* * Set the disabled state on the Add to Widget button. * * @param {boolean} disabled - Disabled. * @return {void} / setAddToWidgetButtonDisabled: function setAddToWidgetButtonDisabled( disabled ) { this.views.parent.views.parent.views.get( '.media-frame-toolbar' )[0].$el.find( '.media-button-select' ).prop( 'disabled', disabled ); }, /* * Set or clear an error notice. * * @param {string} notice - Notice. * @return {void} / setErrorNotice: function setErrorNotice( notice ) { var embedLinkView = this, noticeContainer; // eslint-disable-line consistent-this noticeContainer = embedLinkView.views.parent.$el.find( '> .notice:first-child' ); if ( ! notice ) { if ( noticeContainer.length ) { noticeContainer.slideUp( 'fast' ); } } else { if ( ! noticeContainer.length ) { noticeContainer = $( '<div class="media-widget-embed-notice notice notice-error notice-alt"></div>' ); noticeContainer.hide(); embedLinkView.views.parent.$el.prepend( noticeContainer ); } noticeContainer.empty(); noticeContainer.append( $( '<p>', { html: notice })); noticeContainer.slideDown( 'fast' ); } }, /* * Update oEmbed. * * @since 4.9.0 * * @return {void} / updateoEmbed: function() { var embedLinkView = this, url; // eslint-disable-line consistent-this url = embedLinkView.model.get( 'url' ); // Abort if the URL field was emptied out. if ( ! url ) { embedLinkView.setErrorNotice( '' ); embedLinkView.setAddToWidgetButtonDisabled( true ); return; } if ( ! url.match( /^(http\|https):\/\/.+\// ) ) { embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' ); embedLinkView.setAddToWidgetButtonDisabled( true ); } wp.media.view.EmbedLink.prototype.updateoEmbed.call( embedLinkView ); }, /* * Fetch media. * * @return {void} / fetch: function() { var embedLinkView = this, fetchSuccess, matches, fileExt, urlParser, url, re, youTubeEmbedMatch; // eslint-disable-line consistent-this url = embedLinkView.model.get( 'url' ); if ( embedLinkView.dfd && 'pending' === embedLinkView.dfd.state() ) { embedLinkView.dfd.abort(); } fetchSuccess = function( response ) { embedLinkView.renderoEmbed({ data: { body: response } }); embedLinkView.controller.$el.find( '#embed-url-field' ).removeClass( 'invalid' ); embedLinkView.setErrorNotice( '' ); embedLinkView.setAddToWidgetButtonDisabled( false ); }; urlParser = document.createElement( 'a' ); urlParser.href = url; matches = urlParser.pathname.toLowerCase().match( /\.(\w+)$/ ); if ( matches ) { fileExt = matches[1]; if ( ! wp.media.view.settings.embedMimes[ fileExt ] ) { embedLinkView.renderFail(); } else if ( 0 !== wp.media.view.settings.embedMimes[ fileExt ].indexOf( embedLinkView.controller.options.mimeType ) ) { embedLinkView.renderFail(); } else { fetchSuccess( '<!--success-->' ); } return; } // Support YouTube embed links. re = /https?:\/\/www\.youtube\.com\/embed\/([^/]+)/; youTubeEmbedMatch = re.exec( url ); if ( youTubeEmbedMatch ) { url = 'https://www.youtube.com/watch?v=' + youTubeEmbedMatch[ 1 ]; // silently change url to proper oembed-able version. embedLinkView.model.attributes.url = url; } embedLinkView.dfd = wp.apiRequest({ url: wp.media.view.settings.oEmbedProxyUrl, data: { url: url, maxwidth: embedLinkView.model.get( 'width' ), maxheight: embedLinkView.model.get( 'height' ), discover: false }, type: 'GET', dataType: 'json', context: embedLinkView }); embedLinkView.dfd.done( function( response ) { if ( embedLinkView.controller.options.mimeType !== response.type ) { embedLinkView.renderFail(); return; } fetchSuccess( response.html ); }); embedLinkView.dfd.fail( _.bind( embedLinkView.renderFail, embedLinkView ) ); }, /* * Handle render failure. * * Overrides the {EmbedLink#renderFail()} method to prevent showing the "Link Text" field. * The element is getting display:none in the stylesheet, but the underlying method uses * uses {jQuery.fn.show()} which adds an inline style. This avoids the need for !important. * * @return {void} / renderFail: function renderFail() { var embedLinkView = this; // eslint-disable-line consistent-this embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' ); embedLinkView.setErrorNotice( embedLinkView.controller.options.invalidEmbedTypeError \|\| 'ERROR' ); embedLinkView.setAddToWidgetButtonDisabled( true ); } }); } this.settings( new Constructor({ controller: this.controller, model: this.model.props, priority: 40 })); } }); /* * Custom media frame for selecting uploaded media or providing media by URL. * * @class wp.mediaWidgets.MediaFrameSelect * @augments wp.media.view.MediaFrame.Post / component.MediaFrameSelect = wp.media.view.MediaFrame.Post.extend(/* @lends wp.mediaWidgets.MediaFrameSelect.prototype /{ /* * Create the default states. * * @return {void} / createStates: function createStates() { var mime = this.options.mimeType, specificMimes = []; _.each( wp.media.view.settings.embedMimes, function( embedMime ) { if ( 0 === embedMime.indexOf( mime ) ) { specificMimes.push( embedMime ); } }); if ( specificMimes.length > 0 ) { mime = specificMimes; } this.states.add([ // Main states. new component.PersistentDisplaySettingsLibrary({ id: 'insert', title: this.options.title, selection: this.options.selection, priority: 20, toolbar: 'main-insert', filterable: 'dates', library: wp.media.query({ type: mime }), multiple: false, editable: true, selectedDisplaySettings: this.options.selectedDisplaySettings, displaySettings: _.isUndefined( this.options.showDisplaySettings ) ? true : this.options.showDisplaySettings, displayUserSettings: false // We use the display settings from the current/default widget instance props. }), new wp.media.controller.EditImage({ model: this.options.editImage }), // Embed states. new wp.media.controller.Embed({ metadata: this.options.metadata, type: 'image' === this.options.mimeType ? 'image' : 'link', invalidEmbedTypeError: this.options.invalidEmbedTypeError }) ]); }, /* * Main insert toolbar. * * Forked override of {wp.media.view.MediaFrame.Post#mainInsertToolbar()} to override text. * * @param {wp.Backbone.View} view - Toolbar view. * @this {wp.media.controller.Library} * @return {void} / mainInsertToolbar: function mainInsertToolbar( view ) { var controller = this; // eslint-disable-line consistent-this view.set( 'insert', { style: 'primary', priority: 80, text: controller.options.text, // The whole reason for the fork. requires: { selection: true }, /* * Handle click. * * @ignore * * @fires wp.media.controller.State#insert() * @return {void} / click: function onClick() { var state = controller.state(), selection = state.get( 'selection' ); controller.close(); state.trigger( 'insert', selection ).reset(); } }); }, /* * Main embed toolbar. * * Forked override of {wp.media.view.MediaFrame.Post#mainEmbedToolbar()} to override text. * * @param {wp.Backbone.View} toolbar - Toolbar view. * @this {wp.media.controller.Library} * @return {void} / mainEmbedToolbar: function mainEmbedToolbar( toolbar ) { toolbar.view = new wp.media.view.Toolbar.Embed({ controller: this, text: this.options.text, event: 'insert' }); }, /* * Embed content. * * Forked override of {wp.media.view.MediaFrame.Post#embedContent()} to suppress irrelevant "link text" field. * * @return {void} / embedContent: function embedContent() { var view = new component.MediaEmbedView({ controller: this, model: this.state() }).render(); this.content.set( view ); } }); component.MediaWidgetControl = Backbone.View.extend(/* @lends wp.mediaWidgets.MediaWidgetControl.prototype /{ /* * Translation strings. * * The mapping of translation strings is handled by media widget subclasses, * exported from PHP to JS such as is done in WP_Widget_Media_Image::enqueue_admin_scripts(). * * @type {Object} / l10n: { add_to_widget: '{{add_to_widget}}', add_media: '{{add_media}}' }, /* * Widget ID base. * * This may be defined by the subclass. It may be exported from PHP to JS * such as is done in WP_Widget_Media_Image::enqueue_admin_scripts(). If not, * it will attempt to be discovered by looking to see if this control * instance extends each member of component.controlConstructors, and if * it does extend one, will use the key as the id_base. * * @type {string} / id_base: '', /* * Mime type. * * This must be defined by the subclass. It may be exported from PHP to JS * such as is done in WP_Widget_Media_Image::enqueue_admin_scripts(). * * @type {string} / mime_type: '', /* * View events. * * @type {Object} / events: { 'click .notice-missing-attachment a': 'handleMediaLibraryLinkClick', 'click .select-media': 'selectMedia', 'click .placeholder': 'selectMedia', 'click .edit-media': 'editMedia' }, /* * Show display settings. * * @type {boolean} / showDisplaySettings: true, /* * Media Widget Control. * * @constructs wp.mediaWidgets.MediaWidgetControl * @augments Backbone.View * @abstract * * @param {Object} options - Options. * @param {Backbone.Model} options.model - Model. * @param {jQuery} options.el - Control field container element. * @param {jQuery} options.syncContainer - Container element where fields are synced for the server. * * @return {void} / initialize: function initialize( options ) { var control = this; Backbone.View.prototype.initialize.call( control, options ); if ( ! ( control.model instanceof component.MediaWidgetModel ) ) { throw new Error( 'Missing options.model' ); } if ( ! options.el ) { throw new Error( 'Missing options.el' ); } if ( ! options.syncContainer ) { throw new Error( 'Missing options.syncContainer' ); } control.syncContainer = options.syncContainer; control.$el.addClass( 'media-widget-control' ); // Allow methods to be passed in with control context preserved. _.bindAll( control, 'syncModelToInputs', 'render', 'updateSelectedAttachment', 'renderPreview' ); if ( ! control.id_base ) { _.find( component.controlConstructors, function( Constructor, idBase ) { if ( control instanceof Constructor ) { control.id_base = idBase; return true; } return false; }); if ( ! control.id_base ) { throw new Error( 'Missing id_base.' ); } } // Track attributes needed to renderPreview in it's own model. control.previewTemplateProps = new Backbone.Model( control.mapModelToPreviewTemplateProps() ); // Re-render the preview when the attachment changes. control.selectedAttachment = new wp.media.model.Attachment(); control.renderPreview = _.debounce( control.renderPreview ); control.listenTo( control.previewTemplateProps, 'change', control.renderPreview ); // Make sure a copy of the selected attachment is always fetched. control.model.on( 'change:attachment_id', control.updateSelectedAttachment ); control.model.on( 'change:url', control.updateSelectedAttachment ); control.updateSelectedAttachment(); / * Sync the widget instance model attributes onto the hidden inputs that widgets currently use to store the state. * In the future, when widgets are JS-driven, the underlying widget instance data should be exposed as a model * from the start, without having to sync with hidden fields. See <https://core.trac.wordpress.org/ticket/33507>. / control.listenTo( control.model, 'change', control.syncModelToInputs ); control.listenTo( control.model, 'change', control.syncModelToPreviewProps ); control.listenTo( control.model, 'change', control.render ); // Update the title. control.$el.on( 'input change', '.title', function updateTitle() { control.model.set({ title: $.trim( $( this ).val() ) }); }); // Update link_url attribute. control.$el.on( 'input change', '.link', function updateLinkUrl() { var linkUrl = $.trim( $( this ).val() ), linkType = 'custom'; if ( control.selectedAttachment.get( 'linkUrl' ) === linkUrl \|\| control.selectedAttachment.get( 'link' ) === linkUrl ) { linkType = 'post'; } else if ( control.selectedAttachment.get( 'url' ) === linkUrl ) { linkType = 'file'; } control.model.set( { link_url: linkUrl, link_type: linkType }); // Update display settings for the next time the user opens to select from the media library. control.displaySettings.set( { link: linkType, linkUrl: linkUrl }); }); / * Copy current display settings from the widget model to serve as basis * of customized display settings for the current media frame session. * Changes to display settings will be synced into this model, and * when a new selection is made, the settings from this will be synced * into that AttachmentDisplay's model to persist the setting changes. / control.displaySettings = new Backbone.Model( _.pick( control.mapModelToMediaFrameProps( _.extend( control.model.defaults(), control.model.toJSON() ) ), _.keys( wp.media.view.settings.defaultProps ) ) ); }, /* * Update the selected attachment if necessary. * * @return {void} / updateSelectedAttachment: function updateSelectedAttachment() { var control = this, attachment; if ( 0 === control.model.get( 'attachment_id' ) ) { control.selectedAttachment.clear(); control.model.set( 'error', false ); } else if ( control.model.get( 'attachment_id' ) !== control.selectedAttachment.get( 'id' ) ) { attachment = new wp.media.model.Attachment({ id: control.model.get( 'attachment_id' ) }); attachment.fetch() .done( function done() { control.model.set( 'error', false ); control.selectedAttachment.set( attachment.toJSON() ); }) .fail( function fail() { control.model.set( 'error', 'missing_attachment' ); }); } }, /* * Sync the model attributes to the hidden inputs, and update previewTemplateProps. * * @return {void} / syncModelToPreviewProps: function syncModelToPreviewProps() { var control = this; control.previewTemplateProps.set( control.mapModelToPreviewTemplateProps() ); }, /* * Sync the model attributes to the hidden inputs, and update previewTemplateProps. * * @return {void} / syncModelToInputs: function syncModelToInputs() { var control = this; control.syncContainer.find( '.media-widget-instance-property' ).each( function() { var input = $( this ), value, propertyName; propertyName = input.data( 'property' ); value = control.model.get( propertyName ); if ( _.isUndefined( value ) ) { return; } if ( 'array' === control.model.schema[ propertyName ].type && _.isArray( value ) ) { value = value.join( ',' ); } else if ( 'boolean' === control.model.schema[ propertyName ].type ) { value = value ? '1' : ''; // Because in PHP, strval( true ) === '1' && strval( false ) === ''. } else { value = String( value ); } if ( input.val() !== value ) { input.val( value ); input.trigger( 'change' ); } }); }, /* * Get template. * * @return {Function} Template. / template: function template() { var control = this; if ( ! $( '#tmpl-widget-media-' + control.id_base + '-control' ).length ) { throw new Error( 'Missing widget control template for ' + control.id_base ); } return wp.template( 'widget-media-' + control.id_base + '-control' ); }, /* * Render template. * * @return {void} / render: function render() { var control = this, titleInput; if ( ! control.templateRendered ) { control.$el.html( control.template()( control.model.toJSON() ) ); control.renderPreview(); // Hereafter it will re-render when control.selectedAttachment changes. control.templateRendered = true; } titleInput = control.$el.find( '.title' ); if ( ! titleInput.is( document.activeElement ) ) { titleInput.val( control.model.get( 'title' ) ); } control.$el.toggleClass( 'selected', control.isSelected() ); }, /* * Render media preview. * * @abstract * @return {void} / renderPreview: function renderPreview() { throw new Error( 'renderPreview must be implemented' ); }, /* * Whether a media item is selected. * * @return {boolean} Whether selected and no error. / isSelected: function isSelected() { var control = this; if ( control.model.get( 'error' ) ) { return false; } return Boolean( control.model.get( 'attachment_id' ) \|\| control.model.get( 'url' ) ); }, /* * Handle click on link to Media Library to open modal, such as the link that appears when in the missing attachment error notice. * * @param {jQuery.Event} event - Event. * @return {void} / handleMediaLibraryLinkClick: function handleMediaLibraryLinkClick( event ) { var control = this; event.preventDefault(); control.selectMedia(); }, /* * Open the media select frame to chose an item. * * @return {void} / selectMedia: function selectMedia() { var control = this, selection, mediaFrame, defaultSync, mediaFrameProps, selectionModels = []; if ( control.isSelected() && 0 !== control.model.get( 'attachment_id' ) ) { selectionModels.push( control.selectedAttachment ); } selection = new wp.media.model.Selection( selectionModels, { multiple: false } ); mediaFrameProps = control.mapModelToMediaFrameProps( control.model.toJSON() ); if ( mediaFrameProps.size ) { control.displaySettings.set( 'size', mediaFrameProps.size ); } mediaFrame = new component.MediaFrameSelect({ title: control.l10n.add_media, frame: 'post', text: control.l10n.add_to_widget, selection: selection, mimeType: control.mime_type, selectedDisplaySettings: control.displaySettings, showDisplaySettings: control.showDisplaySettings, metadata: mediaFrameProps, state: control.isSelected() && 0 === control.model.get( 'attachment_id' ) ? 'embed' : 'insert', invalidEmbedTypeError: control.l10n.unsupported_file_type }); wp.media.frame = mediaFrame; // See wp.media(). // Handle selection of a media item. mediaFrame.on( 'insert', function onInsert() { var attachment = {}, state = mediaFrame.state(); // Update cached attachment object to avoid having to re-fetch. This also triggers re-rendering of preview. if ( 'embed' === state.get( 'id' ) ) { _.extend( attachment, { id: 0 }, state.props.toJSON() ); } else { _.extend( attachment, state.get( 'selection' ).first().toJSON() ); } control.selectedAttachment.set( attachment ); control.model.set( 'error', false ); // Update widget instance. control.model.set( control.getModelPropsFromMediaFrame( mediaFrame ) ); }); // Disable syncing of attachment changes back to server (except for deletions). See <https://core.trac.wordpress.org/ticket/40403>. defaultSync = wp.media.model.Attachment.prototype.sync; wp.media.model.Attachment.prototype.sync = function( method ) { if ( 'delete' === method ) { return defaultSync.apply( this, arguments ); } else { return $.Deferred().rejectWith( this ).promise(); } }; mediaFrame.on( 'close', function onClose() { wp.media.model.Attachment.prototype.sync = defaultSync; }); mediaFrame.$el.addClass( 'media-widget' ); mediaFrame.open(); // Clear the selected attachment when it is deleted in the media select frame. if ( selection ) { selection.on( 'destroy', function onDestroy( attachment ) { if ( control.model.get( 'attachment_id' ) === attachment.get( 'id' ) ) { control.model.set({ attachment_id: 0, url: '' }); } }); } / * Make sure focus is set inside of modal so that hitting Esc will close * the modal and not inadvertently cause the widget to collapse in the customizer. / mediaFrame.$el.find( '.media-frame-menu .media-menu-item.active' ).focus(); }, /* * Get the instance props from the media selection frame. * * @param {wp.media.view.MediaFrame.Select} mediaFrame - Select frame. * @return {Object} Props. / getModelPropsFromMediaFrame: function getModelPropsFromMediaFrame( mediaFrame ) { var control = this, state, mediaFrameProps, modelProps; state = mediaFrame.state(); if ( 'insert' === state.get( 'id' ) ) { mediaFrameProps = state.get( 'selection' ).first().toJSON(); mediaFrameProps.postUrl = mediaFrameProps.link; if ( control.showDisplaySettings ) { _.extend( mediaFrameProps, mediaFrame.content.get( '.attachments-browser' ).sidebar.get( 'display' ).model.toJSON() ); } if ( mediaFrameProps.sizes && mediaFrameProps.size && mediaFrameProps.sizes[ mediaFrameProps.size ] ) { mediaFrameProps.url = mediaFrameProps.sizes[ mediaFrameProps.size ].url; } } else if ( 'embed' === state.get( 'id' ) ) { mediaFrameProps = _.extend( state.props.toJSON(), { attachment_id: 0 }, // Because some media frames use `attachment_id` not `id`. control.model.getEmbedResetProps() ); } else { throw new Error( 'Unexpected state: ' + state.get( 'id' ) ); } if ( mediaFrameProps.id ) { mediaFrameProps.attachment_id = mediaFrameProps.id; } modelProps = control.mapMediaToModelProps( mediaFrameProps ); // Clear the extension prop so sources will be reset for video and audio media. _.each( wp.media.view.settings.embedExts, function( ext ) { if ( ext in control.model.schema && modelProps.url !== modelProps[ ext ] ) { modelProps[ ext ] = ''; } }); return modelProps; }, /* * Map media frame props to model props. * * @param {Object} mediaFrameProps - Media frame props. * @return {Object} Model props. / mapMediaToModelProps: function mapMediaToModelProps( mediaFrameProps ) { var control = this, mediaFramePropToModelPropMap = {}, modelProps = {}, extension; _.each( control.model.schema, function( fieldSchema, modelProp ) { // Ignore widget title attribute. if ( 'title' === modelProp ) { return; } mediaFramePropToModelPropMap[ fieldSchema.media_prop \|\| modelProp ] = modelProp; }); _.each( mediaFrameProps, function( value, mediaProp ) { var propName = mediaFramePropToModelPropMap[ mediaProp ] \|\| mediaProp; if ( control.model.schema[ propName ] ) { modelProps[ propName ] = value; } }); if ( 'custom' === mediaFrameProps.size ) { modelProps.width = mediaFrameProps.customWidth; modelProps.height = mediaFrameProps.customHeight; } if ( 'post' === mediaFrameProps.link ) { modelProps.link_url = mediaFrameProps.postUrl \|\| mediaFrameProps.linkUrl; } else if ( 'file' === mediaFrameProps.link ) { modelProps.link_url = mediaFrameProps.url; } // Because some media frames use `id` instead of `attachment_id`. if ( ! mediaFrameProps.attachment_id && mediaFrameProps.id ) { modelProps.attachment_id = mediaFrameProps.id; } if ( mediaFrameProps.url ) { extension = mediaFrameProps.url.replace( /#.$/, '' ).replace( /\?.$/, '' ).split( '.' ).pop().toLowerCase(); if ( extension in control.model.schema ) { modelProps[ extension ] = mediaFrameProps.url; } } // Always omit the titles derived from mediaFrameProps. return _.omit( modelProps, 'title' ); }, /* * Map model props to media frame props. * * @param {Object} modelProps - Model props. * @return {Object} Media frame props. / mapModelToMediaFrameProps: function mapModelToMediaFrameProps( modelProps ) { var control = this, mediaFrameProps = {}; _.each( modelProps, function( value, modelProp ) { var fieldSchema = control.model.schema[ modelProp ] \|\| {}; mediaFrameProps[ fieldSchema.media_prop \|\| modelProp ] = value; }); // Some media frames use attachment_id. mediaFrameProps.attachment_id = mediaFrameProps.id; if ( 'custom' === mediaFrameProps.size ) { mediaFrameProps.customWidth = control.model.get( 'width' ); mediaFrameProps.customHeight = control.model.get( 'height' ); } return mediaFrameProps; }, /* * Map model props to previewTemplateProps. * * @return {Object} Preview Template Props. / mapModelToPreviewTemplateProps: function mapModelToPreviewTemplateProps() { var control = this, previewTemplateProps = {}; _.each( control.model.schema, function( value, prop ) { if ( ! value.hasOwnProperty( 'should_preview_update' ) \|\| value.should_preview_update ) { previewTemplateProps[ prop ] = control.model.get( prop ); } }); // Templates need to be aware of the error. previewTemplateProps.error = control.model.get( 'error' ); return previewTemplateProps; }, /* * Open the media frame to modify the selected item. * * @abstract * @return {void} / editMedia: function editMedia() { throw new Error( 'editMedia not implemented' ); } }); /* * Media widget model. * * @class wp.mediaWidgets.MediaWidgetModel * @augments Backbone.Model / component.MediaWidgetModel = Backbone.Model.extend(/* @lends wp.mediaWidgets.MediaWidgetModel.prototype /{ /* * Id attribute. * * @type {string} / idAttribute: 'widget_id', /* * Instance schema. * * This adheres to JSON Schema and subclasses should have their schema * exported from PHP to JS such as is done in WP_Widget_Media_Image::enqueue_admin_scripts(). * * @type {Object.<string, Object>} / schema: { title: { type: 'string', 'default': '' }, attachment_id: { type: 'integer', 'default': 0 }, url: { type: 'string', 'default': '' } }, /* * Get default attribute values. * * @return {Object} Mapping of property names to their default values. / defaults: function() { var defaults = {}; _.each( this.schema, function( fieldSchema, field ) { defaults[ field ] = fieldSchema['default']; }); return defaults; }, /* * Set attribute value(s). * * This is a wrapped version of Backbone.Model#set() which allows us to * cast the attribute values from the hidden inputs' string values into * the appropriate data types (integers or booleans). * * @param {string\|Object} key - Attribute name or attribute pairs. * @param {mixed\|Object} [val] - Attribute value or options object. * @param {Object} [options] - Options when attribute name and value are passed separately. * @return {wp.mediaWidgets.MediaWidgetModel} This model. / set: function set( key, val, options ) { var model = this, attrs, opts, castedAttrs; // eslint-disable-line consistent-this if ( null === key ) { return model; } if ( 'object' === typeof key ) { attrs = key; opts = val; } else { attrs = {}; attrs[ key ] = val; opts = options; } castedAttrs = {}; _.each( attrs, function( value, name ) { var type; if ( ! model.schema[ name ] ) { castedAttrs[ name ] = value; return; } type = model.schema[ name ].type; if ( 'array' === type ) { castedAttrs[ name ] = value; if ( ! _.isArray( castedAttrs[ name ] ) ) { castedAttrs[ name ] = castedAttrs[ name ].split( /,/ ); // Good enough for parsing an ID list. } if ( model.schema[ name ].items && 'integer' === model.schema[ name ].items.type ) { castedAttrs[ name ] = _.filter( _.map( castedAttrs[ name ], function( id ) { return parseInt( id, 10 ); }, function( id ) { return 'number' === typeof id; } ) ); } } else if ( 'integer' === type ) { castedAttrs[ name ] = parseInt( value, 10 ); } else if ( 'boolean' === type ) { castedAttrs[ name ] = ! ( ! value \|\| '0' === value \|\| 'false' === value ); } else { castedAttrs[ name ] = value; } }); return Backbone.Model.prototype.set.call( this, castedAttrs, opts ); }, /* * Get props which are merged on top of the model when an embed is chosen (as opposed to an attachment). * * @return {Object} Reset/override props. / getEmbedResetProps: function getEmbedResetProps() { return { id: 0 }; } }); /* * Collection of all widget model instances. * * @memberOf wp.mediaWidgets * * @type {Backbone.Collection} / component.modelCollection = new ( Backbone.Collection.extend( { model: component.MediaWidgetModel }) )(); /* * Mapping of widget ID to instances of MediaWidgetControl subclasses. * * @memberOf wp.mediaWidgets * * @type {Object.<string, wp.mediaWidgets.MediaWidgetControl>} / component.widgetControls = {}; /* * Handle widget being added or initialized for the first time at the widget-added event. * * @memberOf wp.mediaWidgets * * @param {jQuery.Event} event - Event. * @param {jQuery} widgetContainer - Widget container element. * * @return {void} / component.handleWidgetAdded = function handleWidgetAdded( event, widgetContainer ) { var fieldContainer, syncContainer, widgetForm, idBase, ControlConstructor, ModelConstructor, modelAttributes, widgetControl, widgetModel, widgetId, animatedCheckDelay = 50, renderWhenAnimationDone; widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' ); // Note: '.form' appears in the customizer, whereas 'form' on the widgets admin screen. idBase = widgetForm.find( '> .id_base' ).val(); widgetId = widgetForm.find( '> .widget-id' ).val(); // Prevent initializing already-added widgets. if ( component.widgetControls[ widgetId ] ) { return; } ControlConstructor = component.controlConstructors[ idBase ]; if ( ! ControlConstructor ) { return; } ModelConstructor = component.modelConstructors[ idBase ] \|\| component.MediaWidgetModel; / * Create a container element for the widget control (Backbone.View). * This is inserted into the DOM immediately before the .widget-content * element because the contents of this element are essentially "managed" * by PHP, where each widget update cause the entire element to be emptied * and replaced with the rendered output of WP_Widget::form() which is * sent back in Ajax request made to save/update the widget instance. * To prevent a "flash of replaced DOM elements and re-initialized JS * components", the JS template is rendered outside of the normal form * container. / fieldContainer = $( '<div></div>' ); syncContainer = widgetContainer.find( '.widget-content:first' ); syncContainer.before( fieldContainer ); / * Sync the widget instance model attributes onto the hidden inputs that widgets currently use to store the state. * In the future, when widgets are JS-driven, the underlying widget instance data should be exposed as a model * from the start, without having to sync with hidden fields. See <https://core.trac.wordpress.org/ticket/33507>. / modelAttributes = {}; syncContainer.find( '.media-widget-instance-property' ).each( function() { var input = $( this ); modelAttributes[ input.data( 'property' ) ] = input.val(); }); modelAttributes.widget_id = widgetId; widgetModel = new ModelConstructor( modelAttributes ); widgetControl = new ControlConstructor({ el: fieldContainer, syncContainer: syncContainer, model: widgetModel }); / * Render the widget once the widget parent's container finishes animating, * as the widget-added event fires with a slideDown of the container. * This ensures that the container's dimensions are fixed so that ME.js * can initialize with the proper dimensions. / renderWhenAnimationDone = function() { if ( ! widgetContainer.hasClass( 'open' ) ) { setTimeout( renderWhenAnimationDone, animatedCheckDelay ); } else { widgetControl.render(); } }; renderWhenAnimationDone(); / * Note that the model and control currently won't ever get garbage-collected * when a widget gets removed/deleted because there is no widget-removed event. / component.modelCollection.add( [ widgetModel ] ); component.widgetControls[ widgetModel.get( 'widget_id' ) ] = widgetControl; }; /* * Setup widget in accessibility mode. * * @memberOf wp.mediaWidgets * * @return {void} / component.setupAccessibleMode = function setupAccessibleMode() { var widgetForm, widgetId, idBase, widgetControl, ControlConstructor, ModelConstructor, modelAttributes, fieldContainer, syncContainer; widgetForm = $( '.editwidget > form' ); if ( 0 === widgetForm.length ) { return; } idBase = widgetForm.find( '> .widget-control-actions > .id_base' ).val(); ControlConstructor = component.controlConstructors[ idBase ]; if ( ! ControlConstructor ) { return; } widgetId = widgetForm.find( '> .widget-control-actions > .widget-id' ).val(); ModelConstructor = component.modelConstructors[ idBase ] \|\| component.MediaWidgetModel; fieldContainer = $( '<div></div>' ); syncContainer = widgetForm.find( '> .widget-inside' ); syncContainer.before( fieldContainer ); modelAttributes = {}; syncContainer.find( '.media-widget-instance-property' ).each( function() { var input = $( this ); modelAttributes[ input.data( 'property' ) ] = input.val(); }); modelAttributes.widget_id = widgetId; widgetControl = new ControlConstructor({ el: fieldContainer, syncContainer: syncContainer, model: new ModelConstructor( modelAttributes ) }); component.modelCollection.add( [ widgetControl.model ] ); component.widgetControls[ widgetControl.model.get( 'widget_id' ) ] = widgetControl; widgetControl.render(); }; /* * Sync widget instance data sanitized from server back onto widget model. * * This gets called via the 'widget-updated' event when saving a widget from * the widgets admin screen and also via the 'widget-synced' event when making * a change to a widget in the customizer. * * @memberOf wp.mediaWidgets * * @param {jQuery.Event} event - Event. * @param {jQuery} widgetContainer - Widget container element. * * @return {void} / component.handleWidgetUpdated = function handleWidgetUpdated( event, widgetContainer ) { var widgetForm, widgetContent, widgetId, widgetControl, attributes = {}; widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' ); widgetId = widgetForm.find( '> .widget-id' ).val(); widgetControl = component.widgetControls[ widgetId ]; if ( ! widgetControl ) { return; } // Make sure the server-sanitized values get synced back into the model. widgetContent = widgetForm.find( '> .widget-content' ); widgetContent.find( '.media-widget-instance-property' ).each( function() { var property = $( this ).data( 'property' ); attributes[ property ] = $( this ).val(); }); // Suspend syncing model back to inputs when syncing from inputs to model, preventing infinite loop. widgetControl.stopListening( widgetControl.model, 'change', widgetControl.syncModelToInputs ); widgetControl.model.set( attributes ); widgetControl.listenTo( widgetControl.model, 'change', widgetControl.syncModelToInputs ); }; /* * Initialize functionality. * * This function exists to prevent the JS file from having to boot itself. * When WordPress enqueues this script, it should have an inline script * attached which calls wp.mediaWidgets.init(). * * @memberOf wp.mediaWidgets * * @return {void} / component.init = function init() { var $document = $( document ); $document.on( 'widget-added', component.handleWidgetAdded ); $document.on( 'widget-synced widget-updated', component.handleWidgetUpdated ); / * Manually trigger widget-added events for media widgets on the admin * screen once they are expanded. The widget-added event is not triggered * for each pre-existing widget on the widgets admin screen like it is * on the customizer. Likewise, the customizer only triggers widget-added * when the widget is expanded to just-in-time construct the widget form * when it is actually going to be displayed. So the following implements * the same for the widgets admin screen, to invoke the widget-added * handler when a pre-existing media widget is expanded. */ $( function initializeExistingWidgetContainers() { var widgetContainers; if ( 'widgets' !== window.pagenow ) { return; } widgetContainers = $( '.widgets-holder-wrap:not(#available-widgets)' ).find( 'div.widget' ); widgetContainers.one( 'click.toggle-widget-expanded', function toggleWidgetExpanded() { var widgetContainer = $( this ); component.handleWidgetAdded( new jQuery.Event( 'widget-added' ), widgetContainer ); }); // Accessibility mode. $( window ).on( 'load', function() { component.setupAccessibleMode(); }); }); }; return component; })( jQuery ); Back

Edit File : media-widgets.js | Size : 41.72 KB

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

/* eslint consistent-this: [ "error", "control" ] */

/**
 * @namespace wp.mediaWidgets
 * @memberOf  wp
 */
wp.mediaWidgets = ( function( $ ) {
	'use strict';

var component = {};

/**
	 * Widget control (view) constructors, mapping widget id_base to subclass of MediaWidgetControl.
	 *
	 * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>}
	 */
	component.controlConstructors = {};

/**
	 * Widget model constructors, mapping widget id_base to subclass of MediaWidgetModel.
	 *
	 * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>}
	 */
	component.modelConstructors = {};

component.PersistentDisplaySettingsLibrary = wp.media.controller.Library.extend(/** @lends wp.mediaWidgets.PersistentDisplaySettingsLibrary.prototype */{

/**
		 * Library which persists the customized display settings across selections.
		 *
		 * @constructs wp.mediaWidgets.PersistentDisplaySettingsLibrary
		 * @augments   wp.media.controller.Library
		 *
		 * @param {Object} options - Options.
		 *
		 * @return {void}
		 */
		initialize: function initialize( options ) {
			_.bindAll( this, 'handleDisplaySettingChange' );
			wp.media.controller.Library.prototype.initialize.call( this, options );
		},

/**
		 * Sync changes to the current display settings back into the current customized.
		 *
		 * @param {Backbone.Model} displaySettings - Modified display settings.
		 * @return {void}
		 */
		handleDisplaySettingChange: function handleDisplaySettingChange( displaySettings ) {
			this.get( 'selectedDisplaySettings' ).set( displaySettings.attributes );
		},

/**
		 * Get the display settings model.
		 *
		 * Model returned is updated with the current customized display settings,
		 * and an event listener is added so that changes made to the settings
		 * will sync back into the model storing the session's customized display
		 * settings.
		 *
		 * @param {Backbone.Model} model - Display settings model.
		 * @return {Backbone.Model} Display settings model.
		 */
		display: function getDisplaySettingsModel( model ) {
			var display, selectedDisplaySettings = this.get( 'selectedDisplaySettings' );
			display = wp.media.controller.Library.prototype.display.call( this, model );

display.off( 'change', this.handleDisplaySettingChange ); // Prevent duplicated event handlers.
			display.set( selectedDisplaySettings.attributes );
			if ( 'custom' === selectedDisplaySettings.get( 'link_type' ) ) {
				display.linkUrl = selectedDisplaySettings.get( 'link_url' );
			}
			display.on( 'change', this.handleDisplaySettingChange );
			return display;
		}
	});

/**
	 * Extended view for managing the embed UI.
	 *
	 * @class    wp.mediaWidgets.MediaEmbedView
	 * @augments wp.media.view.Embed
	 */
	component.MediaEmbedView = wp.media.view.Embed.extend(/** @lends wp.mediaWidgets.MediaEmbedView.prototype */{

/**
		 * Initialize.
		 *
		 * @since 4.9.0
		 *
		 * @param {Object} options - Options.
		 * @return {void}
		 */
		initialize: function( options ) {
			var view = this, embedController; // eslint-disable-line consistent-this
			wp.media.view.Embed.prototype.initialize.call( view, options );
			if ( 'image' !== view.controller.options.mimeType ) {
				embedController = view.controller.states.get( 'embed' );
				embedController.off( 'scan', embedController.scanImage, embedController );
			}
		},

/**
		 * Refresh embed view.
		 *
		 * Forked override of {wp.media.view.Embed#refresh()} to suppress irrelevant "link text" field.
		 *
		 * @return {void}
		 */
		refresh: function refresh() {
			/**
			 * @class wp.mediaWidgets~Constructor
			 */
			var Constructor;

if ( 'image' === this.controller.options.mimeType ) {
				Constructor = wp.media.view.EmbedImage;
			} else {

// This should be eliminated once #40450 lands of when this is merged into core.
				Constructor = wp.media.view.EmbedLink.extend(/** @lends wp.mediaWidgets~Constructor.prototype */{

/**
					 * Set the disabled state on the Add to Widget button.
					 *
					 * @param {boolean} disabled - Disabled.
					 * @return {void}
					 */
					setAddToWidgetButtonDisabled: function setAddToWidgetButtonDisabled( disabled ) {
						this.views.parent.views.parent.views.get( '.media-frame-toolbar' )[0].$el.find( '.media-button-select' ).prop( 'disabled', disabled );
					},

/**
					 * Set or clear an error notice.
					 *
					 * @param {string} notice - Notice.
					 * @return {void}
					 */
					setErrorNotice: function setErrorNotice( notice ) {
						var embedLinkView = this, noticeContainer; // eslint-disable-line consistent-this

noticeContainer = embedLinkView.views.parent.$el.find( '> .notice:first-child' );
						if ( ! notice ) {
							if ( noticeContainer.length ) {
								noticeContainer.slideUp( 'fast' );
							}
						} else {
							if ( ! noticeContainer.length ) {
								noticeContainer = $( '<div class="media-widget-embed-notice notice notice-error notice-alt"></div>' );
								noticeContainer.hide();
								embedLinkView.views.parent.$el.prepend( noticeContainer );
							}
							noticeContainer.empty();
							noticeContainer.append( $( '<p>', {
								html: notice
							}));
							noticeContainer.slideDown( 'fast' );
						}
					},

/**
					 * Update oEmbed.
					 *
					 * @since 4.9.0
					 *
					 * @return {void}
					 */
					updateoEmbed: function() {
						var embedLinkView = this, url; // eslint-disable-line consistent-this

url = embedLinkView.model.get( 'url' );

// Abort if the URL field was emptied out.
						if ( ! url ) {
							embedLinkView.setErrorNotice( '' );
							embedLinkView.setAddToWidgetButtonDisabled( true );
							return;
						}

if ( ! url.match( /^(http|https):\/\/.+\// ) ) {
							embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' );
							embedLinkView.setAddToWidgetButtonDisabled( true );
						}

wp.media.view.EmbedLink.prototype.updateoEmbed.call( embedLinkView );
					},

/**
					 * Fetch media.
					 *
					 * @return {void}
					 */
					fetch: function() {
						var embedLinkView = this, fetchSuccess, matches, fileExt, urlParser, url, re, youTubeEmbedMatch; // eslint-disable-line consistent-this
						url = embedLinkView.model.get( 'url' );

if ( embedLinkView.dfd && 'pending' === embedLinkView.dfd.state() ) {
							embedLinkView.dfd.abort();
						}

fetchSuccess = function( response ) {
							embedLinkView.renderoEmbed({
								data: {
									body: response
								}
							});

embedLinkView.controller.$el.find( '#embed-url-field' ).removeClass( 'invalid' );
							embedLinkView.setErrorNotice( '' );
							embedLinkView.setAddToWidgetButtonDisabled( false );
						};

urlParser = document.createElement( 'a' );
						urlParser.href = url;
						matches = urlParser.pathname.toLowerCase().match( /\.(\w+)$/ );
						if ( matches ) {
							fileExt = matches[1];
							if ( ! wp.media.view.settings.embedMimes[ fileExt ] ) {
								embedLinkView.renderFail();
							} else if ( 0 !== wp.media.view.settings.embedMimes[ fileExt ].indexOf( embedLinkView.controller.options.mimeType ) ) {
								embedLinkView.renderFail();
							} else {
								fetchSuccess( '' );
							}
							return;
						}

// Support YouTube embed links.
						re = /https?:\/\/www\.youtube\.com\/embed\/([^/]+)/;
						youTubeEmbedMatch = re.exec( url );
						if ( youTubeEmbedMatch ) {
							url = 'https://www.youtube.com/watch?v=' + youTubeEmbedMatch[ 1 ];
							// silently change url to proper oembed-able version.
							embedLinkView.model.attributes.url = url;
						}

embedLinkView.dfd = wp.apiRequest({
							url: wp.media.view.settings.oEmbedProxyUrl,
							data: {
								url: url,
								maxwidth: embedLinkView.model.get( 'width' ),
								maxheight: embedLinkView.model.get( 'height' ),
								discover: false
							},
							type: 'GET',
							dataType: 'json',
							context: embedLinkView
						});

embedLinkView.dfd.done( function( response ) {
							if ( embedLinkView.controller.options.mimeType !== response.type ) {
								embedLinkView.renderFail();
								return;
							}
							fetchSuccess( response.html );
						});
						embedLinkView.dfd.fail( _.bind( embedLinkView.renderFail, embedLinkView ) );
					},

/**
					 * Handle render failure.
					 *
					 * Overrides the {EmbedLink#renderFail()} method to prevent showing the "Link Text" field.
					 * The element is getting display:none in the stylesheet, but the underlying method uses
					 * uses {jQuery.fn.show()} which adds an inline style. This avoids the need for !important.
					 *
					 * @return {void}
					 */
					renderFail: function renderFail() {
						var embedLinkView = this; // eslint-disable-line consistent-this
						embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' );
						embedLinkView.setErrorNotice( embedLinkView.controller.options.invalidEmbedTypeError || 'ERROR' );
						embedLinkView.setAddToWidgetButtonDisabled( true );
					}
				});
			}

this.settings( new Constructor({
				controller: this.controller,
				model:      this.model.props,
				priority:   40
			}));
		}
	});

/**
	 * Custom media frame for selecting uploaded media or providing media by URL.
	 *
	 * @class    wp.mediaWidgets.MediaFrameSelect
	 * @augments wp.media.view.MediaFrame.Post
	 */
	component.MediaFrameSelect = wp.media.view.MediaFrame.Post.extend(/** @lends wp.mediaWidgets.MediaFrameSelect.prototype */{

/**
		 * Create the default states.
		 *
		 * @return {void}
		 */
		createStates: function createStates() {
			var mime = this.options.mimeType, specificMimes = [];
			_.each( wp.media.view.settings.embedMimes, function( embedMime ) {
				if ( 0 === embedMime.indexOf( mime ) ) {
					specificMimes.push( embedMime );
				}
			});
			if ( specificMimes.length > 0 ) {
				mime = specificMimes;
			}

this.states.add([

// Main states.
				new component.PersistentDisplaySettingsLibrary({
					id:         'insert',
					title:      this.options.title,
					selection:  this.options.selection,
					priority:   20,
					toolbar:    'main-insert',
					filterable: 'dates',
					library:    wp.media.query({
						type: mime
					}),
					multiple:   false,
					editable:   true,

selectedDisplaySettings: this.options.selectedDisplaySettings,
					displaySettings: _.isUndefined( this.options.showDisplaySettings ) ? true : this.options.showDisplaySettings,
					displayUserSettings: false // We use the display settings from the current/default widget instance props.
				}),

new wp.media.controller.EditImage({ model: this.options.editImage }),

// Embed states.
				new wp.media.controller.Embed({
					metadata: this.options.metadata,
					type: 'image' === this.options.mimeType ? 'image' : 'link',
					invalidEmbedTypeError: this.options.invalidEmbedTypeError
				})
			]);
		},

/**
		 * Main insert toolbar.
		 *
		 * Forked override of {wp.media.view.MediaFrame.Post#mainInsertToolbar()} to override text.
		 *
		 * @param {wp.Backbone.View} view - Toolbar view.
		 * @this {wp.media.controller.Library}
		 * @return {void}
		 */
		mainInsertToolbar: function mainInsertToolbar( view ) {
			var controller = this; // eslint-disable-line consistent-this
			view.set( 'insert', {
				style:    'primary',
				priority: 80,
				text:     controller.options.text, // The whole reason for the fork.
				requires: { selection: true },

/**
				 * Handle click.
				 *
				 * @ignore
				 *
				 * @fires wp.media.controller.State#insert()
				 * @return {void}
				 */
				click: function onClick() {
					var state = controller.state(),
						selection = state.get( 'selection' );

controller.close();
					state.trigger( 'insert', selection ).reset();
				}
			});
		},

/**
		 * Main embed toolbar.
		 *
		 * Forked override of {wp.media.view.MediaFrame.Post#mainEmbedToolbar()} to override text.
		 *
		 * @param {wp.Backbone.View} toolbar - Toolbar view.
		 * @this {wp.media.controller.Library}
		 * @return {void}
		 */
		mainEmbedToolbar: function mainEmbedToolbar( toolbar ) {
			toolbar.view = new wp.media.view.Toolbar.Embed({
				controller: this,
				text: this.options.text,
				event: 'insert'
			});
		},

/**
		 * Embed content.
		 *
		 * Forked override of {wp.media.view.MediaFrame.Post#embedContent()} to suppress irrelevant "link text" field.
		 *
		 * @return {void}
		 */
		embedContent: function embedContent() {
			var view = new component.MediaEmbedView({
				controller: this,
				model:      this.state()
			}).render();

this.content.set( view );
		}
	});

component.MediaWidgetControl = Backbone.View.extend(/** @lends wp.mediaWidgets.MediaWidgetControl.prototype */{

/**
		 * Translation strings.
		 *
		 * The mapping of translation strings is handled by media widget subclasses,
		 * exported from PHP to JS such as is done in WP_Widget_Media_Image::enqueue_admin_scripts().
		 *
		 * @type {Object}
		 */
		l10n: {
			add_to_widget: '{{add_to_widget}}',
			add_media: '{{add_media}}'
		},

/**
		 * Widget ID base.
		 *
		 * This may be defined by the subclass. It may be exported from PHP to JS
		 * such as is done in WP_Widget_Media_Image::enqueue_admin_scripts(). If not,
		 * it will attempt to be discovered by looking to see if this control
		 * instance extends each member of component.controlConstructors, and if
		 * it does extend one, will use the key as the id_base.
		 *
		 * @type {string}
		 */
		id_base: '',

/**
		 * Mime type.
		 *
		 * This must be defined by the subclass. It may be exported from PHP to JS
		 * such as is done in WP_Widget_Media_Image::enqueue_admin_scripts().
		 *
		 * @type {string}
		 */
		mime_type: '',

/**
		 * View events.
		 *
		 * @type {Object}
		 */
		events: {
			'click .notice-missing-attachment a': 'handleMediaLibraryLinkClick',
			'click .select-media': 'selectMedia',
			'click .placeholder': 'selectMedia',
			'click .edit-media': 'editMedia'
		},

/**
		 * Show display settings.
		 *
		 * @type {boolean}
		 */
		showDisplaySettings: true,

/**
		 * Media Widget Control.
		 *
		 * @constructs wp.mediaWidgets.MediaWidgetControl
		 * @augments   Backbone.View
		 * @abstract
		 *
		 * @param {Object}         options - Options.
		 * @param {Backbone.Model} options.model - Model.
		 * @param {jQuery}         options.el - Control field container element.
		 * @param {jQuery}         options.syncContainer - Container element where fields are synced for the server.
		 *
		 * @return {void}
		 */
		initialize: function initialize( options ) {
			var control = this;

Backbone.View.prototype.initialize.call( control, options );

if ( ! ( control.model instanceof component.MediaWidgetModel ) ) {
				throw new Error( 'Missing options.model' );
			}
			if ( ! options.el ) {
				throw new Error( 'Missing options.el' );
			}
			if ( ! options.syncContainer ) {
				throw new Error( 'Missing options.syncContainer' );
			}

control.syncContainer = options.syncContainer;

control.$el.addClass( 'media-widget-control' );

// Allow methods to be passed in with control context preserved.
			_.bindAll( control, 'syncModelToInputs', 'render', 'updateSelectedAttachment', 'renderPreview' );

if ( ! control.id_base ) {
				_.find( component.controlConstructors, function( Constructor, idBase ) {
					if ( control instanceof Constructor ) {
						control.id_base = idBase;
						return true;
					}
					return false;
				});
				if ( ! control.id_base ) {
					throw new Error( 'Missing id_base.' );
				}
			}

// Track attributes needed to renderPreview in it's own model.
			control.previewTemplateProps = new Backbone.Model( control.mapModelToPreviewTemplateProps() );

// Re-render the preview when the attachment changes.
			control.selectedAttachment = new wp.media.model.Attachment();
			control.renderPreview = _.debounce( control.renderPreview );
			control.listenTo( control.previewTemplateProps, 'change', control.renderPreview );

// Make sure a copy of the selected attachment is always fetched.
			control.model.on( 'change:attachment_id', control.updateSelectedAttachment );
			control.model.on( 'change:url', control.updateSelectedAttachment );
			control.updateSelectedAttachment();

/*
			 * Sync the widget instance model attributes onto the hidden inputs that widgets currently use to store the state.
			 * In the future, when widgets are JS-driven, the underlying widget instance data should be exposed as a model
			 * from the start, without having to sync with hidden fields. See <https://core.trac.wordpress.org/ticket/33507>.
			 */
			control.listenTo( control.model, 'change', control.syncModelToInputs );
			control.listenTo( control.model, 'change', control.syncModelToPreviewProps );
			control.listenTo( control.model, 'change', control.render );

// Update the title.
			control.$el.on( 'input change', '.title', function updateTitle() {
				control.model.set({
					title: $.trim( $( this ).val() )
				});
			});

// Update link_url attribute.
			control.$el.on( 'input change', '.link', function updateLinkUrl() {
				var linkUrl = $.trim( $( this ).val() ), linkType = 'custom';
				if ( control.selectedAttachment.get( 'linkUrl' ) === linkUrl || control.selectedAttachment.get( 'link' ) === linkUrl ) {
					linkType = 'post';
				} else if ( control.selectedAttachment.get( 'url' ) === linkUrl ) {
					linkType = 'file';
				}
				control.model.set( {
					link_url: linkUrl,
					link_type: linkType
				});

// Update display settings for the next time the user opens to select from the media library.
				control.displaySettings.set( {
					link: linkType,
					linkUrl: linkUrl
				});
			});

/*
			 * Copy current display settings from the widget model to serve as basis
			 * of customized display settings for the current media frame session.
			 * Changes to display settings will be synced into this model, and
			 * when a new selection is made, the settings from this will be synced
			 * into that AttachmentDisplay's model to persist the setting changes.
			 */
			control.displaySettings = new Backbone.Model( _.pick(
				control.mapModelToMediaFrameProps(
					_.extend( control.model.defaults(), control.model.toJSON() )
				),
				_.keys( wp.media.view.settings.defaultProps )
			) );
		},

/**
		 * Update the selected attachment if necessary.
		 *
		 * @return {void}
		 */
		updateSelectedAttachment: function updateSelectedAttachment() {
			var control = this, attachment;

if ( 0 === control.model.get( 'attachment_id' ) ) {
				control.selectedAttachment.clear();
				control.model.set( 'error', false );
			} else if ( control.model.get( 'attachment_id' ) !== control.selectedAttachment.get( 'id' ) ) {
				attachment = new wp.media.model.Attachment({
					id: control.model.get( 'attachment_id' )
				});
				attachment.fetch()
					.done( function done() {
						control.model.set( 'error', false );
						control.selectedAttachment.set( attachment.toJSON() );
					})
					.fail( function fail() {
						control.model.set( 'error', 'missing_attachment' );
					});
			}
		},

/**
		 * Sync the model attributes to the hidden inputs, and update previewTemplateProps.
		 *
		 * @return {void}
		 */
		syncModelToPreviewProps: function syncModelToPreviewProps() {
			var control = this;
			control.previewTemplateProps.set( control.mapModelToPreviewTemplateProps() );
		},

/**
		 * Sync the model attributes to the hidden inputs, and update previewTemplateProps.
		 *
		 * @return {void}
		 */
		syncModelToInputs: function syncModelToInputs() {
			var control = this;
			control.syncContainer.find( '.media-widget-instance-property' ).each( function() {
				var input = $( this ), value, propertyName;
				propertyName = input.data( 'property' );
				value = control.model.get( propertyName );
				if ( _.isUndefined( value ) ) {
					return;
				}

if ( 'array' === control.model.schema[ propertyName ].type && _.isArray( value ) ) {
					value = value.join( ',' );
				} else if ( 'boolean' === control.model.schema[ propertyName ].type ) {
					value = value ? '1' : ''; // Because in PHP, strval( true ) === '1' && strval( false ) === ''.
				} else {
					value = String( value );
				}

if ( input.val() !== value ) {
					input.val( value );
					input.trigger( 'change' );
				}
			});
		},

/**
		 * Get template.
		 *
		 * @return {Function} Template.
		 */
		template: function template() {
			var control = this;
			if ( ! $( '#tmpl-widget-media-' + control.id_base + '-control' ).length ) {
				throw new Error( 'Missing widget control template for ' + control.id_base );
			}
			return wp.template( 'widget-media-' + control.id_base + '-control' );
		},

/**
		 * Render template.
		 *
		 * @return {void}
		 */
		render: function render() {
			var control = this, titleInput;

if ( ! control.templateRendered ) {
				control.$el.html( control.template()( control.model.toJSON() ) );
				control.renderPreview(); // Hereafter it will re-render when control.selectedAttachment changes.
				control.templateRendered = true;
			}

titleInput = control.$el.find( '.title' );
			if ( ! titleInput.is( document.activeElement ) ) {
				titleInput.val( control.model.get( 'title' ) );
			}

control.$el.toggleClass( 'selected', control.isSelected() );
		},

/**
		 * Render media preview.
		 *
		 * @abstract
		 * @return {void}
		 */
		renderPreview: function renderPreview() {
			throw new Error( 'renderPreview must be implemented' );
		},

/**
		 * Whether a media item is selected.
		 *
		 * @return {boolean} Whether selected and no error.
		 */
		isSelected: function isSelected() {
			var control = this;

if ( control.model.get( 'error' ) ) {
				return false;
			}

return Boolean( control.model.get( 'attachment_id' ) || control.model.get( 'url' ) );
		},

/**
		 * Handle click on link to Media Library to open modal, such as the link that appears when in the missing attachment error notice.
		 *
		 * @param {jQuery.Event} event - Event.
		 * @return {void}
		 */
		handleMediaLibraryLinkClick: function handleMediaLibraryLinkClick( event ) {
			var control = this;
			event.preventDefault();
			control.selectMedia();
		},

/**
		 * Open the media select frame to chose an item.
		 *
		 * @return {void}
		 */
		selectMedia: function selectMedia() {
			var control = this, selection, mediaFrame, defaultSync, mediaFrameProps, selectionModels = [];

if ( control.isSelected() && 0 !== control.model.get( 'attachment_id' ) ) {
				selectionModels.push( control.selectedAttachment );
			}

selection = new wp.media.model.Selection( selectionModels, { multiple: false } );

mediaFrameProps = control.mapModelToMediaFrameProps( control.model.toJSON() );
			if ( mediaFrameProps.size ) {
				control.displaySettings.set( 'size', mediaFrameProps.size );
			}

mediaFrame = new component.MediaFrameSelect({
				title: control.l10n.add_media,
				frame: 'post',
				text: control.l10n.add_to_widget,
				selection: selection,
				mimeType: control.mime_type,
				selectedDisplaySettings: control.displaySettings,
				showDisplaySettings: control.showDisplaySettings,
				metadata: mediaFrameProps,
				state: control.isSelected() && 0 === control.model.get( 'attachment_id' ) ? 'embed' : 'insert',
				invalidEmbedTypeError: control.l10n.unsupported_file_type
			});
			wp.media.frame = mediaFrame; // See wp.media().

// Handle selection of a media item.
			mediaFrame.on( 'insert', function onInsert() {
				var attachment = {}, state = mediaFrame.state();

// Update cached attachment object to avoid having to re-fetch. This also triggers re-rendering of preview.
				if ( 'embed' === state.get( 'id' ) ) {
					_.extend( attachment, { id: 0 }, state.props.toJSON() );
				} else {
					_.extend( attachment, state.get( 'selection' ).first().toJSON() );
				}

control.selectedAttachment.set( attachment );
				control.model.set( 'error', false );

// Update widget instance.
				control.model.set( control.getModelPropsFromMediaFrame( mediaFrame ) );
			});

// Disable syncing of attachment changes back to server (except for deletions). See <https://core.trac.wordpress.org/ticket/40403>.
			defaultSync = wp.media.model.Attachment.prototype.sync;
			wp.media.model.Attachment.prototype.sync = function( method ) {
				if ( 'delete' === method ) {
					return defaultSync.apply( this, arguments );
				} else {
					return $.Deferred().rejectWith( this ).promise();
				}
			};
			mediaFrame.on( 'close', function onClose() {
				wp.media.model.Attachment.prototype.sync = defaultSync;
			});

mediaFrame.$el.addClass( 'media-widget' );
			mediaFrame.open();

// Clear the selected attachment when it is deleted in the media select frame.
			if ( selection ) {
				selection.on( 'destroy', function onDestroy( attachment ) {
					if ( control.model.get( 'attachment_id' ) === attachment.get( 'id' ) ) {
						control.model.set({
							attachment_id: 0,
							url: ''
						});
					}
				});
			}

/*
			 * Make sure focus is set inside of modal so that hitting Esc will close
			 * the modal and not inadvertently cause the widget to collapse in the customizer.
			 */
			mediaFrame.$el.find( '.media-frame-menu .media-menu-item.active' ).focus();
		},

/**
		 * Get the instance props from the media selection frame.
		 *
		 * @param {wp.media.view.MediaFrame.Select} mediaFrame - Select frame.
		 * @return {Object} Props.
		 */
		getModelPropsFromMediaFrame: function getModelPropsFromMediaFrame( mediaFrame ) {
			var control = this, state, mediaFrameProps, modelProps;

state = mediaFrame.state();
			if ( 'insert' === state.get( 'id' ) ) {
				mediaFrameProps = state.get( 'selection' ).first().toJSON();
				mediaFrameProps.postUrl = mediaFrameProps.link;

if ( control.showDisplaySettings ) {
					_.extend(
						mediaFrameProps,
						mediaFrame.content.get( '.attachments-browser' ).sidebar.get( 'display' ).model.toJSON()
					);
				}
				if ( mediaFrameProps.sizes && mediaFrameProps.size && mediaFrameProps.sizes[ mediaFrameProps.size ] ) {
					mediaFrameProps.url = mediaFrameProps.sizes[ mediaFrameProps.size ].url;
				}
			} else if ( 'embed' === state.get( 'id' ) ) {
				mediaFrameProps = _.extend(
					state.props.toJSON(),
					{ attachment_id: 0 }, // Because some media frames use `attachment_id` not `id`.
					control.model.getEmbedResetProps()
				);
			} else {
				throw new Error( 'Unexpected state: ' + state.get( 'id' ) );
			}

if ( mediaFrameProps.id ) {
				mediaFrameProps.attachment_id = mediaFrameProps.id;
			}

modelProps = control.mapMediaToModelProps( mediaFrameProps );

// Clear the extension prop so sources will be reset for video and audio media.
			_.each( wp.media.view.settings.embedExts, function( ext ) {
				if ( ext in control.model.schema && modelProps.url !== modelProps[ ext ] ) {
					modelProps[ ext ] = '';
				}
			});

return modelProps;
		},

/**
		 * Map media frame props to model props.
		 *
		 * @param {Object} mediaFrameProps - Media frame props.
		 * @return {Object} Model props.
		 */
		mapMediaToModelProps: function mapMediaToModelProps( mediaFrameProps ) {
			var control = this, mediaFramePropToModelPropMap = {}, modelProps = {}, extension;
			_.each( control.model.schema, function( fieldSchema, modelProp ) {

// Ignore widget title attribute.
				if ( 'title' === modelProp ) {
					return;
				}
				mediaFramePropToModelPropMap[ fieldSchema.media_prop || modelProp ] = modelProp;
			});

_.each( mediaFrameProps, function( value, mediaProp ) {
				var propName = mediaFramePropToModelPropMap[ mediaProp ] || mediaProp;
				if ( control.model.schema[ propName ] ) {
					modelProps[ propName ] = value;
				}
			});

if ( 'custom' === mediaFrameProps.size ) {
				modelProps.width = mediaFrameProps.customWidth;
				modelProps.height = mediaFrameProps.customHeight;
			}

if ( 'post' === mediaFrameProps.link ) {
				modelProps.link_url = mediaFrameProps.postUrl || mediaFrameProps.linkUrl;
			} else if ( 'file' === mediaFrameProps.link ) {
				modelProps.link_url = mediaFrameProps.url;
			}

// Because some media frames use `id` instead of `attachment_id`.
			if ( ! mediaFrameProps.attachment_id && mediaFrameProps.id ) {
				modelProps.attachment_id = mediaFrameProps.id;
			}

if ( mediaFrameProps.url ) {
				extension = mediaFrameProps.url.replace( /#.*$/, '' ).replace( /\?.*$/, '' ).split( '.' ).pop().toLowerCase();
				if ( extension in control.model.schema ) {
					modelProps[ extension ] = mediaFrameProps.url;
				}
			}

// Always omit the titles derived from mediaFrameProps.
			return _.omit( modelProps, 'title' );
		},

/**
		 * Map model props to media frame props.
		 *
		 * @param {Object} modelProps - Model props.
		 * @return {Object} Media frame props.
		 */
		mapModelToMediaFrameProps: function mapModelToMediaFrameProps( modelProps ) {
			var control = this, mediaFrameProps = {};

_.each( modelProps, function( value, modelProp ) {
				var fieldSchema = control.model.schema[ modelProp ] || {};
				mediaFrameProps[ fieldSchema.media_prop || modelProp ] = value;
			});

// Some media frames use attachment_id.
			mediaFrameProps.attachment_id = mediaFrameProps.id;

if ( 'custom' === mediaFrameProps.size ) {
				mediaFrameProps.customWidth = control.model.get( 'width' );
				mediaFrameProps.customHeight = control.model.get( 'height' );
			}

return mediaFrameProps;
		},

/**
		 * Map model props to previewTemplateProps.
		 *
		 * @return {Object} Preview Template Props.
		 */
		mapModelToPreviewTemplateProps: function mapModelToPreviewTemplateProps() {
			var control = this, previewTemplateProps = {};
			_.each( control.model.schema, function( value, prop ) {
				if ( ! value.hasOwnProperty( 'should_preview_update' ) || value.should_preview_update ) {
					previewTemplateProps[ prop ] = control.model.get( prop );
				}
			});

// Templates need to be aware of the error.
			previewTemplateProps.error = control.model.get( 'error' );
			return previewTemplateProps;
		},

/**
		 * Open the media frame to modify the selected item.
		 *
		 * @abstract
		 * @return {void}
		 */
		editMedia: function editMedia() {
			throw new Error( 'editMedia not implemented' );
		}
	});

/**
	 * Media widget model.
	 *
	 * @class    wp.mediaWidgets.MediaWidgetModel
	 * @augments Backbone.Model
	 */
	component.MediaWidgetModel = Backbone.Model.extend(/** @lends wp.mediaWidgets.MediaWidgetModel.prototype */{

/**
		 * Id attribute.
		 *
		 * @type {string}
		 */
		idAttribute: 'widget_id',

/**
		 * Instance schema.
		 *
		 * This adheres to JSON Schema and subclasses should have their schema
		 * exported from PHP to JS such as is done in WP_Widget_Media_Image::enqueue_admin_scripts().
		 *
		 * @type {Object.<string, Object>}
		 */
		schema: {
			title: {
				type: 'string',
				'default': ''
			},
			attachment_id: {
				type: 'integer',
				'default': 0
			},
			url: {
				type: 'string',
				'default': ''
			}
		},

/**
		 * Get default attribute values.
		 *
		 * @return {Object} Mapping of property names to their default values.
		 */
		defaults: function() {
			var defaults = {};
			_.each( this.schema, function( fieldSchema, field ) {
				defaults[ field ] = fieldSchema['default'];
			});
			return defaults;
		},

/**
		 * Set attribute value(s).
		 *
		 * This is a wrapped version of Backbone.Model#set() which allows us to
		 * cast the attribute values from the hidden inputs' string values into
		 * the appropriate data types (integers or booleans).
		 *
		 * @param {string|Object} key - Attribute name or attribute pairs.
		 * @param {mixed|Object}  [val] - Attribute value or options object.
		 * @param {Object}        [options] - Options when attribute name and value are passed separately.
		 * @return {wp.mediaWidgets.MediaWidgetModel} This model.
		 */
		set: function set( key, val, options ) {
			var model = this, attrs, opts, castedAttrs; // eslint-disable-line consistent-this
			if ( null === key ) {
				return model;
			}
			if ( 'object' === typeof key ) {
				attrs = key;
				opts = val;
			} else {
				attrs = {};
				attrs[ key ] = val;
				opts = options;
			}

castedAttrs = {};
			_.each( attrs, function( value, name ) {
				var type;
				if ( ! model.schema[ name ] ) {
					castedAttrs[ name ] = value;
					return;
				}
				type = model.schema[ name ].type;
				if ( 'array' === type ) {
					castedAttrs[ name ] = value;
					if ( ! _.isArray( castedAttrs[ name ] ) ) {
						castedAttrs[ name ] = castedAttrs[ name ].split( /,/ ); // Good enough for parsing an ID list.
					}
					if ( model.schema[ name ].items && 'integer' === model.schema[ name ].items.type ) {
						castedAttrs[ name ] = _.filter(
							_.map( castedAttrs[ name ], function( id ) {
								return parseInt( id, 10 );
							},
							function( id ) {
								return 'number' === typeof id;
							}
						) );
					}
				} else if ( 'integer' === type ) {
					castedAttrs[ name ] = parseInt( value, 10 );
				} else if ( 'boolean' === type ) {
					castedAttrs[ name ] = ! ( ! value || '0' === value || 'false' === value );
				} else {
					castedAttrs[ name ] = value;
				}
			});

return Backbone.Model.prototype.set.call( this, castedAttrs, opts );
		},

/**
		 * Get props which are merged on top of the model when an embed is chosen (as opposed to an attachment).
		 *
		 * @return {Object} Reset/override props.
		 */
		getEmbedResetProps: function getEmbedResetProps() {
			return {
				id: 0
			};
		}
	});

/**
	 * Collection of all widget model instances.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @type {Backbone.Collection}
	 */
	component.modelCollection = new ( Backbone.Collection.extend( {
		model: component.MediaWidgetModel
	}) )();

/**
	 * Mapping of widget ID to instances of MediaWidgetControl subclasses.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @type {Object.<string, wp.mediaWidgets.MediaWidgetControl>}
	 */
	component.widgetControls = {};

/**
	 * Handle widget being added or initialized for the first time at the widget-added event.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @param {jQuery.Event} event - Event.
	 * @param {jQuery}       widgetContainer - Widget container element.
	 *
	 * @return {void}
	 */
	component.handleWidgetAdded = function handleWidgetAdded( event, widgetContainer ) {
		var fieldContainer, syncContainer, widgetForm, idBase, ControlConstructor, ModelConstructor, modelAttributes, widgetControl, widgetModel, widgetId, animatedCheckDelay = 50, renderWhenAnimationDone;
		widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' ); // Note: '.form' appears in the customizer, whereas 'form' on the widgets admin screen.
		idBase = widgetForm.find( '> .id_base' ).val();
		widgetId = widgetForm.find( '> .widget-id' ).val();

// Prevent initializing already-added widgets.
		if ( component.widgetControls[ widgetId ] ) {
			return;
		}

ControlConstructor = component.controlConstructors[ idBase ];
		if ( ! ControlConstructor ) {
			return;
		}

ModelConstructor = component.modelConstructors[ idBase ] || component.MediaWidgetModel;

/*
		 * Create a container element for the widget control (Backbone.View).
		 * This is inserted into the DOM immediately before the .widget-content
		 * element because the contents of this element are essentially "managed"
		 * by PHP, where each widget update cause the entire element to be emptied
		 * and replaced with the rendered output of WP_Widget::form() which is
		 * sent back in Ajax request made to save/update the widget instance.
		 * To prevent a "flash of replaced DOM elements and re-initialized JS
		 * components", the JS template is rendered outside of the normal form
		 * container.
		 */
		fieldContainer = $( '<div></div>' );
		syncContainer = widgetContainer.find( '.widget-content:first' );
		syncContainer.before( fieldContainer );

/*
		 * Sync the widget instance model attributes onto the hidden inputs that widgets currently use to store the state.
		 * In the future, when widgets are JS-driven, the underlying widget instance data should be exposed as a model
		 * from the start, without having to sync with hidden fields. See <https://core.trac.wordpress.org/ticket/33507>.
		 */
		modelAttributes = {};
		syncContainer.find( '.media-widget-instance-property' ).each( function() {
			var input = $( this );
			modelAttributes[ input.data( 'property' ) ] = input.val();
		});
		modelAttributes.widget_id = widgetId;

widgetModel = new ModelConstructor( modelAttributes );

widgetControl = new ControlConstructor({
			el: fieldContainer,
			syncContainer: syncContainer,
			model: widgetModel
		});

/*
		 * Render the widget once the widget parent's container finishes animating,
		 * as the widget-added event fires with a slideDown of the container.
		 * This ensures that the container's dimensions are fixed so that ME.js
		 * can initialize with the proper dimensions.
		 */
		renderWhenAnimationDone = function() {
			if ( ! widgetContainer.hasClass( 'open' ) ) {
				setTimeout( renderWhenAnimationDone, animatedCheckDelay );
			} else {
				widgetControl.render();
			}
		};
		renderWhenAnimationDone();

/*
		 * Note that the model and control currently won't ever get garbage-collected
		 * when a widget gets removed/deleted because there is no widget-removed event.
		 */
		component.modelCollection.add( [ widgetModel ] );
		component.widgetControls[ widgetModel.get( 'widget_id' ) ] = widgetControl;
	};

/**
	 * Setup widget in accessibility mode.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @return {void}
	 */
	component.setupAccessibleMode = function setupAccessibleMode() {
		var widgetForm, widgetId, idBase, widgetControl, ControlConstructor, ModelConstructor, modelAttributes, fieldContainer, syncContainer;
		widgetForm = $( '.editwidget > form' );
		if ( 0 === widgetForm.length ) {
			return;
		}

idBase = widgetForm.find( '> .widget-control-actions > .id_base' ).val();

ControlConstructor = component.controlConstructors[ idBase ];
		if ( ! ControlConstructor ) {
			return;
		}

widgetId = widgetForm.find( '> .widget-control-actions > .widget-id' ).val();

ModelConstructor = component.modelConstructors[ idBase ] || component.MediaWidgetModel;
		fieldContainer = $( '<div></div>' );
		syncContainer = widgetForm.find( '> .widget-inside' );
		syncContainer.before( fieldContainer );

modelAttributes = {};
		syncContainer.find( '.media-widget-instance-property' ).each( function() {
			var input = $( this );
			modelAttributes[ input.data( 'property' ) ] = input.val();
		});
		modelAttributes.widget_id = widgetId;

widgetControl = new ControlConstructor({
			el: fieldContainer,
			syncContainer: syncContainer,
			model: new ModelConstructor( modelAttributes )
		});

component.modelCollection.add( [ widgetControl.model ] );
		component.widgetControls[ widgetControl.model.get( 'widget_id' ) ] = widgetControl;

widgetControl.render();
	};

/**
	 * Sync widget instance data sanitized from server back onto widget model.
	 *
	 * This gets called via the 'widget-updated' event when saving a widget from
	 * the widgets admin screen and also via the 'widget-synced' event when making
	 * a change to a widget in the customizer.
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @param {jQuery.Event} event - Event.
	 * @param {jQuery}       widgetContainer - Widget container element.
	 *
	 * @return {void}
	 */
	component.handleWidgetUpdated = function handleWidgetUpdated( event, widgetContainer ) {
		var widgetForm, widgetContent, widgetId, widgetControl, attributes = {};
		widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' );
		widgetId = widgetForm.find( '> .widget-id' ).val();

widgetControl = component.widgetControls[ widgetId ];
		if ( ! widgetControl ) {
			return;
		}

// Make sure the server-sanitized values get synced back into the model.
		widgetContent = widgetForm.find( '> .widget-content' );
		widgetContent.find( '.media-widget-instance-property' ).each( function() {
			var property = $( this ).data( 'property' );
			attributes[ property ] = $( this ).val();
		});

// Suspend syncing model back to inputs when syncing from inputs to model, preventing infinite loop.
		widgetControl.stopListening( widgetControl.model, 'change', widgetControl.syncModelToInputs );
		widgetControl.model.set( attributes );
		widgetControl.listenTo( widgetControl.model, 'change', widgetControl.syncModelToInputs );
	};

/**
	 * Initialize functionality.
	 *
	 * This function exists to prevent the JS file from having to boot itself.
	 * When WordPress enqueues this script, it should have an inline script
	 * attached which calls wp.mediaWidgets.init().
	 *
	 * @memberOf wp.mediaWidgets
	 *
	 * @return {void}
	 */
	component.init = function init() {
		var $document = $( document );
		$document.on( 'widget-added', component.handleWidgetAdded );
		$document.on( 'widget-synced widget-updated', component.handleWidgetUpdated );

/*
		 * Manually trigger widget-added events for media widgets on the admin
		 * screen once they are expanded. The widget-added event is not triggered
		 * for each pre-existing widget on the widgets admin screen like it is
		 * on the customizer. Likewise, the customizer only triggers widget-added
		 * when the widget is expanded to just-in-time construct the widget form
		 * when it is actually going to be displayed. So the following implements
		 * the same for the widgets admin screen, to invoke the widget-added
		 * handler when a pre-existing media widget is expanded.
		 */
		$( function initializeExistingWidgetContainers() {
			var widgetContainers;
			if ( 'widgets' !== window.pagenow ) {
				return;
			}
			widgetContainers = $( '.widgets-holder-wrap:not(#available-widgets)' ).find( 'div.widget' );
			widgetContainers.one( 'click.toggle-widget-expanded', function toggleWidgetExpanded() {
				var widgetContainer = $( this );
				component.handleWidgetAdded( new jQuery.Event( 'widget-added' ), widgetContainer );
			});

// Accessibility mode.
			$( window ).on( 'load', function() {
				component.setupAccessibleMode();
			});
		});
	};

return component;
})( jQuery );

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