430 lines
15 KiB
JavaScript
430 lines
15 KiB
JavaScript
/* global wp */
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/* eslint consistent-this: [ "error", "control" ] */
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/* eslint no-magic-numbers: ["error", { "ignore": [0,1,-1] }] */
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wp.customHtmlWidgets = ( function( $ ) {
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'use strict';
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var component = {
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idBases: [ 'custom_html' ],
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codeEditorSettings: {},
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l10n: {
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errorNotice: {
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singular: '',
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plural: ''
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}
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}
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};
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/**
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* Text widget control.
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*
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* @class CustomHtmlWidgetControl
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* @constructor
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* @abstract
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*/
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component.CustomHtmlWidgetControl = Backbone.View.extend({
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/**
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* View events.
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*
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* @type {Object}
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*/
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events: {},
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/**
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* Initialize.
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*
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* @param {Object} options - Options.
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* @param {jQuery} options.el - Control field container element.
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* @param {jQuery} options.syncContainer - Container element where fields are synced for the server.
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* @returns {void}
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*/
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initialize: function initialize( options ) {
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var control = this;
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if ( ! options.el ) {
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throw new Error( 'Missing options.el' );
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}
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if ( ! options.syncContainer ) {
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throw new Error( 'Missing options.syncContainer' );
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}
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Backbone.View.prototype.initialize.call( control, options );
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control.syncContainer = options.syncContainer;
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control.widgetIdBase = control.syncContainer.parent().find( '.id_base' ).val();
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control.widgetNumber = control.syncContainer.parent().find( '.widget_number' ).val();
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control.customizeSettingId = 'widget_' + control.widgetIdBase + '[' + String( control.widgetNumber ) + ']';
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control.$el.addClass( 'custom-html-widget-fields' );
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control.$el.html( wp.template( 'widget-custom-html-control-fields' )( { codeEditorDisabled: component.codeEditorSettings.disabled } ) );
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control.errorNoticeContainer = control.$el.find( '.code-editor-error-container' );
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control.currentErrorAnnotations = [];
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control.saveButton = control.syncContainer.add( control.syncContainer.parent().find( '.widget-control-actions' ) ).find( '.widget-control-save, #savewidget' );
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control.saveButton.addClass( 'custom-html-widget-save-button' ); // To facilitate style targeting.
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control.fields = {
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title: control.$el.find( '.title' ),
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content: control.$el.find( '.content' )
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};
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// Sync input fields to hidden sync fields which actually get sent to the server.
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_.each( control.fields, function( fieldInput, fieldName ) {
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fieldInput.on( 'input change', function updateSyncField() {
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var syncInput = control.syncContainer.find( '.sync-input.' + fieldName );
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if ( syncInput.val() !== fieldInput.val() ) {
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syncInput.val( fieldInput.val() );
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syncInput.trigger( 'change' );
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}
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});
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// Note that syncInput cannot be re-used because it will be destroyed with each widget-updated event.
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fieldInput.val( control.syncContainer.find( '.sync-input.' + fieldName ).val() );
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});
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},
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/**
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* Update input fields from the sync fields.
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*
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* This function is called at the widget-updated and widget-synced events.
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* A field will only be updated if it is not currently focused, to avoid
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* overwriting content that the user is entering.
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*
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* @returns {void}
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*/
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updateFields: function updateFields() {
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var control = this, syncInput;
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if ( ! control.fields.title.is( document.activeElement ) ) {
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syncInput = control.syncContainer.find( '.sync-input.title' );
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control.fields.title.val( syncInput.val() );
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}
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/*
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* Prevent updating content when the editor is focused or if there are current error annotations,
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* to prevent the editor's contents from getting sanitized as soon as a user removes focus from
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* the editor. This is particularly important for users who cannot unfiltered_html.
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*/
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control.contentUpdateBypassed = control.fields.content.is( document.activeElement ) || control.editor && control.editor.codemirror.state.focused || 0 !== control.currentErrorAnnotations;
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if ( ! control.contentUpdateBypassed ) {
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syncInput = control.syncContainer.find( '.sync-input.content' );
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control.fields.content.val( syncInput.val() ).trigger( 'change' );
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}
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},
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/**
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* Show linting error notice.
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*
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* @param {Array} errorAnnotations - Error annotations.
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* @returns {void}
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*/
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updateErrorNotice: function( errorAnnotations ) {
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var control = this, errorNotice, message = '', customizeSetting;
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if ( 1 === errorAnnotations.length ) {
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message = component.l10n.errorNotice.singular.replace( '%d', '1' );
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} else if ( errorAnnotations.length > 1 ) {
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message = component.l10n.errorNotice.plural.replace( '%d', String( errorAnnotations.length ) );
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}
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if ( control.fields.content[0].setCustomValidity ) {
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control.fields.content[0].setCustomValidity( message );
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}
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if ( wp.customize && wp.customize.has( control.customizeSettingId ) ) {
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customizeSetting = wp.customize( control.customizeSettingId );
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customizeSetting.notifications.remove( 'htmlhint_error' );
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if ( 0 !== errorAnnotations.length ) {
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customizeSetting.notifications.add( 'htmlhint_error', new wp.customize.Notification( 'htmlhint_error', {
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message: message,
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type: 'error'
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} ) );
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}
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} else if ( 0 !== errorAnnotations.length ) {
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errorNotice = $( '<div class="inline notice notice-error notice-alt"></div>' );
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errorNotice.append( $( '<p></p>', {
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text: message
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} ) );
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control.errorNoticeContainer.empty();
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control.errorNoticeContainer.append( errorNotice );
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control.errorNoticeContainer.slideDown( 'fast' );
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wp.a11y.speak( message );
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} else {
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control.errorNoticeContainer.slideUp( 'fast' );
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}
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},
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/**
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* Initialize editor.
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*
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* @returns {void}
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*/
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initializeEditor: function initializeEditor() {
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var control = this, settings;
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if ( component.codeEditorSettings.disabled ) {
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return;
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}
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settings = _.extend( {}, component.codeEditorSettings, {
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/**
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* Handle tabbing to the field before the editor.
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*
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* @returns {void}
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*/
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onTabPrevious: function onTabPrevious() {
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control.fields.title.focus();
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},
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/**
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* Handle tabbing to the field after the editor.
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*
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* @returns {void}
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*/
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onTabNext: function onTabNext() {
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var tabbables = control.syncContainer.add( control.syncContainer.parent().find( '.widget-position, .widget-control-actions' ) ).find( ':tabbable' );
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tabbables.first().focus();
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},
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/**
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* Disable save button and store linting errors for use in updateFields.
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*
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* @param {Array} errorAnnotations - Error notifications.
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* @returns {void}
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*/
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onChangeLintingErrors: function onChangeLintingErrors( errorAnnotations ) {
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control.currentErrorAnnotations = errorAnnotations;
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},
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/**
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* Update error notice.
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*
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* @param {Array} errorAnnotations - Error annotations.
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* @returns {void}
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*/
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onUpdateErrorNotice: function onUpdateErrorNotice( errorAnnotations ) {
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control.saveButton.toggleClass( 'validation-blocked disabled', errorAnnotations.length > 0 );
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control.updateErrorNotice( errorAnnotations );
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}
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});
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control.editor = wp.codeEditor.initialize( control.fields.content, settings );
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// Improve the editor accessibility.
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$( control.editor.codemirror.display.lineDiv )
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.attr({
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role: 'textbox',
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'aria-multiline': 'true',
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'aria-labelledby': control.fields.content[0].id + '-label',
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'aria-describedby': 'editor-keyboard-trap-help-1 editor-keyboard-trap-help-2 editor-keyboard-trap-help-3 editor-keyboard-trap-help-4'
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});
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// Focus the editor when clicking on its label.
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$( '#' + control.fields.content[0].id + '-label' ).on( 'click', function() {
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control.editor.codemirror.focus();
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});
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control.fields.content.on( 'change', function() {
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if ( this.value !== control.editor.codemirror.getValue() ) {
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control.editor.codemirror.setValue( this.value );
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}
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});
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control.editor.codemirror.on( 'change', function() {
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var value = control.editor.codemirror.getValue();
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if ( value !== control.fields.content.val() ) {
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control.fields.content.val( value ).trigger( 'change' );
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}
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});
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// 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.
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control.editor.codemirror.on( 'blur', function() {
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if ( control.contentUpdateBypassed ) {
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control.syncContainer.find( '.sync-input.content' ).trigger( 'change' );
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}
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});
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// Prevent hitting Esc from collapsing the widget control.
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if ( wp.customize ) {
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control.editor.codemirror.on( 'keydown', function onKeydown( codemirror, event ) {
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var escKeyCode = 27;
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if ( escKeyCode === event.keyCode ) {
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event.stopPropagation();
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}
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});
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}
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}
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});
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/**
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* Mapping of widget ID to instances of CustomHtmlWidgetControl subclasses.
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*
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* @type {Object.<string, wp.textWidgets.CustomHtmlWidgetControl>}
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*/
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component.widgetControls = {};
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/**
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* Handle widget being added or initialized for the first time at the widget-added event.
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*
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* @param {jQuery.Event} event - Event.
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* @param {jQuery} widgetContainer - Widget container element.
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* @returns {void}
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*/
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component.handleWidgetAdded = function handleWidgetAdded( event, widgetContainer ) {
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var widgetForm, idBase, widgetControl, widgetId, animatedCheckDelay = 50, renderWhenAnimationDone, fieldContainer, syncContainer;
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widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' ); // Note: '.form' appears in the customizer, whereas 'form' on the widgets admin screen.
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idBase = widgetForm.find( '> .id_base' ).val();
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if ( -1 === component.idBases.indexOf( idBase ) ) {
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return;
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}
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// Prevent initializing already-added widgets.
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widgetId = widgetForm.find( '.widget-id' ).val();
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if ( component.widgetControls[ widgetId ] ) {
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return;
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}
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/*
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* Create a container element for the widget control fields.
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* This is inserted into the DOM immediately before the the .widget-content
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* element because the contents of this element are essentially "managed"
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* by PHP, where each widget update cause the entire element to be emptied
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* and replaced with the rendered output of WP_Widget::form() which is
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* sent back in Ajax request made to save/update the widget instance.
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* To prevent a "flash of replaced DOM elements and re-initialized JS
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* components", the JS template is rendered outside of the normal form
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* container.
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*/
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fieldContainer = $( '<div></div>' );
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syncContainer = widgetContainer.find( '.widget-content:first' );
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syncContainer.before( fieldContainer );
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widgetControl = new component.CustomHtmlWidgetControl({
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el: fieldContainer,
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syncContainer: syncContainer
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});
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component.widgetControls[ widgetId ] = widgetControl;
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/*
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* Render the widget once the widget parent's container finishes animating,
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* as the widget-added event fires with a slideDown of the container.
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* This ensures that the textarea is visible and the editor can be initialized.
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*/
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renderWhenAnimationDone = function() {
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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
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setTimeout( renderWhenAnimationDone, animatedCheckDelay );
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} else {
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widgetControl.initializeEditor();
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}
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};
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renderWhenAnimationDone();
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};
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/**
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* Setup widget in accessibility mode.
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*
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* @returns {void}
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*/
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component.setupAccessibleMode = function setupAccessibleMode() {
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var widgetForm, idBase, widgetControl, fieldContainer, syncContainer;
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widgetForm = $( '.editwidget > form' );
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if ( 0 === widgetForm.length ) {
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return;
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}
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idBase = widgetForm.find( '> .widget-control-actions > .id_base' ).val();
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if ( -1 === component.idBases.indexOf( idBase ) ) {
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return;
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}
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fieldContainer = $( '<div></div>' );
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syncContainer = widgetForm.find( '> .widget-inside' );
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syncContainer.before( fieldContainer );
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widgetControl = new component.CustomHtmlWidgetControl({
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el: fieldContainer,
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syncContainer: syncContainer
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});
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widgetControl.initializeEditor();
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};
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/**
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* Sync widget instance data sanitized from server back onto widget model.
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*
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* This gets called via the 'widget-updated' event when saving a widget from
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* the widgets admin screen and also via the 'widget-synced' event when making
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* a change to a widget in the customizer.
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*
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* @param {jQuery.Event} event - Event.
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* @param {jQuery} widgetContainer - Widget container element.
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* @returns {void}
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*/
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component.handleWidgetUpdated = function handleWidgetUpdated( event, widgetContainer ) {
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var widgetForm, widgetId, widgetControl, idBase;
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widgetForm = widgetContainer.find( '> .widget-inside > .form, > .widget-inside > form' );
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idBase = widgetForm.find( '> .id_base' ).val();
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if ( -1 === component.idBases.indexOf( idBase ) ) {
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return;
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}
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widgetId = widgetForm.find( '> .widget-id' ).val();
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widgetControl = component.widgetControls[ widgetId ];
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if ( ! widgetControl ) {
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return;
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}
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widgetControl.updateFields();
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};
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/**
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* Initialize functionality.
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*
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* This function exists to prevent the JS file from having to boot itself.
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* When WordPress enqueues this script, it should have an inline script
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* attached which calls wp.textWidgets.init().
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*
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* @param {object} settings - Options for code editor, exported from PHP.
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* @returns {void}
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*/
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component.init = function init( settings ) {
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var $document = $( document );
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_.extend( component.codeEditorSettings, settings );
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$document.on( 'widget-added', component.handleWidgetAdded );
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$document.on( 'widget-synced widget-updated', component.handleWidgetUpdated );
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/*
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* Manually trigger widget-added events for media widgets on the admin
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* screen once they are expanded. The widget-added event is not triggered
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* for each pre-existing widget on the widgets admin screen like it is
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* on the customizer. Likewise, the customizer only triggers widget-added
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* when the widget is expanded to just-in-time construct the widget form
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* when it is actually going to be displayed. So the following implements
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* the same for the widgets admin screen, to invoke the widget-added
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* handler when a pre-existing media widget is expanded.
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*/
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$( function initializeExistingWidgetContainers() {
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var widgetContainers;
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if ( 'widgets' !== window.pagenow ) {
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return;
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}
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widgetContainers = $( '.widgets-holder-wrap:not(#available-widgets)' ).find( 'div.widget' );
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widgetContainers.one( 'click.toggle-widget-expanded', function toggleWidgetExpanded() {
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var widgetContainer = $( this );
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component.handleWidgetAdded( new jQuery.Event( 'widget-added' ), widgetContainer );
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});
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// Accessibility mode.
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$( window ).on( 'load', function() {
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component.setupAccessibleMode();
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});
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});
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};
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return component;
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})( jQuery );
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