name : custom-html-widgets.js /** * @output wp-admin/js/widgets/custom-html-widgets.js */ /* global wp */ /* eslint consistent-this: [ "error", "control" ] */ /* eslint no-magic-numbers: ["error", { "ignore": [0,1,-1] }] */ /** * @namespace wp.customHtmlWidget * @memberOf wp */ wp.customHtmlWidgets = ( function( $ ) { 'use strict'; var component = { idBases: [ 'custom_html' ], codeEditorSettings: {}, l10n: { errorNotice: { singular: '', plural: '' } } }; component.CustomHtmlWidgetControl = Backbone.View.extend(/** @lends wp.customHtmlWidgets.CustomHtmlWidgetControl.prototype */{ /** * View events. * * @type {Object} */ events: {}, /** * Text widget control. * * @constructs wp.customHtmlWidgets.CustomHtmlWidgetControl * @augments Backbone.View * @abstract * * @param {Object} options - Options. * @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; if ( ! options.el ) { throw new Error( 'Missing options.el' ); } if ( ! options.syncContainer ) { throw new Error( 'Missing options.syncContainer' ); } Backbone.View.prototype.initialize.call( control, options ); control.syncContainer = options.syncContainer; control.widgetIdBase = control.syncContainer.parent().find( '.id_base' ).val(); control.widgetNumber = control.syncContainer.parent().find( '.widget_number' ).val(); control.customizeSettingId = 'widget_' + control.widgetIdBase + '[' + String( control.widgetNumber ) + ']'; control.$el.addClass( 'custom-html-widget-fields' ); control.$el.html( wp.template( 'widget-custom-html-control-fields' )( { codeEditorDisabled: component.codeEditorSettings.disabled } ) ); control.errorNoticeContainer = control.$el.find( '.code-editor-error-container' ); control.currentErrorAnnotations = []; control.saveButton = control.syncContainer.add( control.syncContainer.parent().find( '.widget-control-actions' ) ).find( '.widget-control-save, #savewidget' ); control.saveButton.addClass( 'custom-html-widget-save-button' ); // To facilitate style targeting. control.fields = { title: control.$el.find( '.title' ), content: control.$el.find( '.content' ) }; // Sync input fields to hidden sync fields which actually get sent to the server. _.each( control.fields, function( fieldInput, fieldName ) { fieldInput.on( 'input change', function updateSyncField() { var syncInput = control.syncContainer.find( '.sync-input.' + fieldName ); if ( syncInput.val() !== fieldInput.val() ) { syncInput.val( fieldInput.val() ); syncInput.trigger( 'change' ); } }); // Note that syncInput cannot be re-used because it will be destroyed with each widget-updated event. fieldInput.val( control.syncContainer.find( '.sync-input.' + fieldName ).val() ); }); }, /** * Update input fields from the sync fields. * * This function is called at the widget-updated and widget-synced events. * A field will only be updated if it is not currently focused, to avoid * overwriting content that the user is entering. * * @return {void} */ updateFields: function updateFields() { var control = this, syncInput; if ( ! control.fields.title.is( document.activeElement ) ) { syncInput = control.syncContainer.find( '.sync-input.title' ); control.fields.title.val( syncInput.val() ); } /* * Prevent updating content when the editor is focused or if there are current error annotations, * to prevent the editor's contents from getting sanitized as soon as a user removes focus from * the editor. This is particularly important for users who cannot unfiltered_html. */ control.contentUpdateBypassed = control.fields.content.is( document.activeElement ) || control.editor && control.editor.codemirror.state.focused || 0 !== control.currentErrorAnnotations.length; if ( ! control.contentUpdateBypassed ) { syncInput = control.syncContainer.find( '.sync-input.content' ); control.fields.content.val( syncInput.val() ); } }, /** * Show linting error notice. * * @param {Array} errorAnnotations - Error annotations. * @return {void} */ updateErrorNotice: function( errorAnnotations ) { var control = this, errorNotice, message = '', customizeSetting; if ( 1 === errorAnnotations.length ) { message = component.l10n.errorNotice.singular.replace( '%d', '1' ); } else if ( errorAnnotations.length > 1 ) { message = component.l10n.errorNotice.plural.replace( '%d', String( errorAnnotations.length ) ); } if ( control.fields.content[0].setCustomValidity ) { control.fields.content[0].setCustomValidity( message ); } if ( wp.customize && wp.customize.has( control.customizeSettingId ) ) { customizeSetting = wp.customize( control.customizeSettingId ); customizeSetting.notifications.remove( 'htmlhint_error' ); if ( 0 !== errorAnnotations.length ) { customizeSetting.notifications.add( 'htmlhint_error', new wp.customize.Notification( 'htmlhint_error', { message: message, type: 'error' } ) ); } } else if ( 0 !== errorAnnotations.length ) { errorNotice = $( '<div class="inline notice notice-error notice-alt" role="alert"></div>' ); errorNotice.append( $( '<p></p>', { text: message } ) ); control.errorNoticeContainer.empty(); control.errorNoticeContainer.append( errorNotice ); control.errorNoticeContainer.slideDown( 'fast' ); wp.a11y.speak( message ); } else { control.errorNoticeContainer.slideUp( 'fast' ); } }, /** * Initialize editor. * * @return {void} */ initializeEditor: function initializeEditor() { var control = this, settings; if ( component.codeEditorSettings.disabled ) { return; } settings = _.extend( {}, component.codeEditorSettings, { /** * Handle tabbing to the field before the editor. * * @ignore * * @return {void} */ onTabPrevious: function onTabPrevious() { control.fields.title.focus(); }, /** * Handle tabbing to the field after the editor. * * @ignore * * @return {void} */ onTabNext: function onTabNext() { var tabbables = control.syncContainer.add( control.syncContainer.parent().find( '.widget-position, .widget-control-actions' ) ).find( ':tabbable' ); tabbables.first().focus(); }, /** * Disable save button and store linting errors for use in updateFields. * * @ignore * * @param {Array} errorAnnotations - Error notifications. * @return {void} */ onChangeLintingErrors: function onChangeLintingErrors( errorAnnotations ) { control.currentErrorAnnotations = errorAnnotations; }, /** * Update error notice. * * @ignore * * @param {Array} errorAnnotations - Error annotations. * @return {void} */ onUpdateErrorNotice: function onUpdateErrorNotice( errorAnnotations ) { control.saveButton.toggleClass( 'validation-blocked disabled', errorAnnotations.length > 0 ); control.updateErrorNotice( errorAnnotations ); } }); control.editor = wp.codeEditor.initialize( control.fields.content, settings ); // Improve the editor accessibility. $( control.editor.codemirror.display.lineDiv ) .attr({ role: 'textbox', 'aria-multiline': 'true', 'aria-labelledby': control.fields.content[0].id + '-label', 'aria-describedby': 'editor-keyboard-trap-help-1 editor-keyboard-trap-help-2 editor-keyboard-trap-help-3 editor-keyboard-trap-help-4' }); // Focus the editor when clicking on its label. $( '#' + control.fields.content[0].id + '-label' ).on( 'click', function() { control.editor.codemirror.focus(); }); control.fields.content.on( 'change', function() { if ( this.value !== control.editor.codemirror.getValue() ) { control.editor.codemirror.setValue( this.value ); } }); control.editor.codemirror.on( 'change', function() { var value = control.editor.codemirror.getValue(); if ( value !== control.fields.content.val() ) { control.fields.content.val( value ).trigger( 'change' ); } }); // Make sure the editor gets updated if the content was updated on the server (sanitization) but not updated in the editor since it was focused. control.editor.codemirror.on( 'blur', function() { if ( control.contentUpdateBypassed ) { control.syncContainer.find( '.sync-input.content' ).trigger( 'change' ); } }); // Prevent hitting Esc from collapsing the widget control. if ( wp.customize ) { control.editor.codemirror.on( 'keydown', function onKeydown( codemirror, event ) { var escKeyCode = 27; if ( escKeyCode === event.keyCode ) { event.stopPropagation(); } }); } } }); /** * Mapping of widget ID to instances of CustomHtmlWidgetControl subclasses. * * @alias wp.customHtmlWidgets.widgetControls * * @type {Object.<string, wp.textWidgets.CustomHtmlWidgetControl>} */ component.widgetControls = {}; /** * Handle widget being added or initialized for the first time at the widget-added event. * * @alias wp.customHtmlWidgets.handleWidgetAdded * * @param {jQuery.Event} event - Event. * @param {jQuery} widgetContainer - Widget container element. * * @return {void} */ component.handleWidgetAdded = function handleWidgetAdded( event, widgetContainer ) { var widgetForm, idBase, widgetControl, widgetId, animatedCheckDelay = 50, renderWhenAnimationDone, fieldContainer, syncContainer; 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(); if ( -1 === component.idBases.indexOf( idBase ) ) { return; } // Prevent initializing already-added widgets. widgetId = widgetForm.find( '.widget-id' ).val(); if ( component.widgetControls[ widgetId ] ) { return; } /* * Create a container element for the widget control fields. * This is inserted into the DOM immediately before the 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 ); widgetControl = new component.CustomHtmlWidgetControl({ el: fieldContainer, syncContainer: syncContainer }); component.widgetControls[ widgetId ] = widgetControl; /* * 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 textarea is visible and the editor can be initialized. */ renderWhenAnimationDone = function() { if ( ! ( wp.customize ? widgetContainer.parent().hasClass( 'expanded' ) : widgetContainer.hasClass( 'open' ) ) ) { // Core merge: The wp.customize condition can be eliminated with this change being in core: https://github.com/xwp/wordpress-develop/pull/247/commits/5322387d setTimeout( renderWhenAnimationDone, animatedCheckDelay ); } else { widgetControl.initializeEditor(); } }; renderWhenAnimationDone(); }; /** * Setup widget in accessibility mode. * * @alias wp.customHtmlWidgets.setupAccessibleMode * * @return {void} */ component.setupAccessibleMode = function setupAccessibleMode() { var widgetForm, idBase, widgetControl, fieldContainer, syncContainer; widgetForm = $( '.editwidget > form' ); if ( 0 === widgetForm.length ) { return; } idBase = widgetForm.find( '.id_base' ).val(); if ( -1 === component.idBases.indexOf( idBase ) ) { return; } fieldContainer = $( '<div></div>' ); syncContainer = widgetForm.find( '> .widget-inside' ); syncContainer.before( fieldContainer ); widgetControl = new component.CustomHtmlWidgetControl({ el: fieldContainer, syncContainer: syncContainer }); widgetControl.initializeEditor(); }; /** * 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. * * @alias wp.customHtmlWidgets.handleWidgetUpdated * * @param {jQuery.Event} event - Event. * @param {jQuery} widgetContainer - Widget container element. * @return {void} */ component.handleWidgetUpdated = function handleWidgetUpdated( event, widgetContainer ) { var widgetForm, widgetId, widgetControl, idBase; widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' ); idBase = widgetForm.find( '> .id_base' ).val(); if ( -1 === component.idBases.indexOf( idBase ) ) { return; } widgetId = widgetForm.find( '> .widget-id' ).val(); widgetControl = component.widgetControls[ widgetId ]; if ( ! widgetControl ) { return; } widgetControl.updateFields(); }; /** * 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.textWidgets.init(). * * @alias wp.customHtmlWidgets.init * * @param {Object} settings - Options for code editor, exported from PHP. * * @return {void} */ component.init = function init( settings ) { var $document = $( document ); _.extend( component.codeEditorSettings, settings ); $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. if ( document.readyState === 'complete' ) { // Page is fully loaded. component.setupAccessibleMode(); } else { // Page is still loading. $( window ).on( 'load', function() { component.setupAccessibleMode(); }); } }); }; return component; })( jQuery );