wp-admin/js/widgets/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"></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 );