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<title>[40631] trunk: Widgets: Extend the Text widget with TinyMCE.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/40631">40631</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/40631","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>westonruter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-05-11 18:54:24 +0000 (Thu, 11 May 2017)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Widgets: Extend the Text widget with TinyMCE.

Introduces rich text formatting: bold, italic, lists, links.

Props westonruter, azaozz, timmydcrawford, obenland, melchoyce.
See <a href="https://core.trac.wordpress.org/ticket/35760">#35760</a>.
Fixes <a href="https://core.trac.wordpress.org/ticket/35243">#35243</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkGruntfilejs">trunk/Gruntfile.js</a></li>
<li><a href="#trunksrcwpadmincsscustomizewidgetscss">trunk/src/wp-admin/css/customize-widgets.css</a></li>
<li><a href="#trunksrcwpincludesdefaultfiltersphp">trunk/src/wp-includes/default-filters.php</a></li>
<li><a href="#trunksrcwpincludesscriptloaderphp">trunk/src/wp-includes/script-loader.php</a></li>
<li><a href="#trunksrcwpincludeswidgetsclasswpwidgettextphp">trunk/src/wp-includes/widgets/class-wp-widget-text.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li>trunk/src/wp-admin/js/widgets/</li>
<li><a href="#trunksrcwpadminjswidgetstextwidgetsjs">trunk/src/wp-admin/js/widgets/text-widgets.js</a></li>
<li>trunk/tests/phpunit/tests/widgets/</li>
<li><a href="#trunktestsphpunittestswidgetstextwidgetphp">trunk/tests/phpunit/tests/widgets/text-widget.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkGruntfilejs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/Gruntfile.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/Gruntfile.js        2017-05-11 18:40:17 UTC (rev 40630)
+++ trunk/Gruntfile.js  2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -456,7 +456,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                dest: BUILD_DIR,
</span><span class="cx" style="display: block; padding: 0 10px">                                ext: '.min.js',
</span><span class="cx" style="display: block; padding: 0 10px">                                src: [
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'wp-admin/js/*.js',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'wp-admin/js/**/*.js',
</ins><span class="cx" style="display: block; padding: 0 10px">                                         'wp-includes/js/*.js',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'wp-includes/js/mediaelement/wp-mediaelement.js',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'wp-includes/js/mediaelement/wp-playlist.js',
</span></span></pre></div>
<a id="trunksrcwpadmincsscustomizewidgetscss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/customize-widgets.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/customize-widgets.css      2017-05-11 18:40:17 UTC (rev 40630)
+++ trunk/src/wp-admin/css/customize-widgets.css        2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -213,6 +213,21 @@
</span><span class="cx" style="display: block; padding: 0 10px">        display: block;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/* Text Widget */
+.wp-customizer div.mce-inline-toolbar-grp,
+.wp-customizer div.mce-tooltip {
+       z-index: 500100 !important;
+}
+.wp-customizer .ui-autocomplete.wplink-autocomplete {
+       z-index: 500110; /* originally 100110, but z-index of .wp-full-overlay is 500000 */
+}
+.wp-customizer #wp-link-backdrop {
+       z-index: 500100; /* originally 100100, but z-index of .wp-full-overlay is 500000 */
+}
+.wp-customizer #wp-link-wrap {
+       z-index: 500105; /* originally 100105, but z-index of .wp-full-overlay is 500000 */
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Styles for new widget addition panel
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span></span></pre></div>
<a id="trunksrcwpadminjswidgetstextwidgetsjs"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-admin/js/widgets/text-widgets.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/js/widgets/text-widgets.js                             (rev 0)
+++ trunk/src/wp-admin/js/widgets/text-widgets.js       2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,326 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/* global tinymce, switchEditors */
+/* eslint consistent-this: [ "error", "control" ] */
+wp.textWidgets = ( function( $ ) {
+       'use strict';
+
+       var component = {};
+
+       /**
+        * Text widget control.
+        *
+        * @class TextWidgetControl
+        * @constructor
+        * @abstract
+        */
+       component.TextWidgetControl = Backbone.View.extend({
+
+               /**
+                * View events.
+                *
+                * @type {Object}
+                */
+               events: {},
+
+               /**
+                * Initialize.
+                *
+                * @param {Object}         options - Options.
+                * @param {Backbone.Model} options.model - Model.
+                * @param {jQuery}         options.el - Control container element.
+                * @returns {void}
+                */
+               initialize: function initialize( options ) {
+                       var control = this;
+
+                       if ( ! options.el ) {
+                               throw new Error( 'Missing options.el' );
+                       }
+
+                       Backbone.View.prototype.initialize.call( control, options );
+
+                       /*
+                        * 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.
+                        */
+                       control.fieldContainer = $( '<div class="text-widget-fields"></div>' );
+                       control.fieldContainer.html( wp.template( 'widget-text-control-fields' ) );
+                       control.widgetContentContainer = control.$el.find( '.widget-content:first' );
+                       control.widgetContentContainer.before( control.fieldContainer );
+
+                       control.fields = {
+                               title: control.fieldContainer.find( '.title' ),
+                               text: control.fieldContainer.find( '.text' )
+                       };
+
+                       // 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.widgetContentContainer.find( 'input[type=hidden].' + fieldName );
+                                       if ( syncInput.val() !== $( this ).val() ) {
+                                               syncInput.val( $( this ).val() );
+                                               syncInput.trigger( 'change' );
+                                       }
+                               });
+
+                               // Note that syncInput cannot be re-used because it will be destroyed with each widget-updated event.
+                               fieldInput.val( control.widgetContentContainer.find( 'input[type=hidden].' + 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.
+                *
+                * @returns {void}
+                */
+               updateFields: function updateFields() {
+                       var control = this, syncInput;
+
+                       if ( ! control.fields.title.is( document.activeElement ) ) {
+                               syncInput = control.widgetContentContainer.find( 'input[type=hidden].title' );
+                               control.fields.title.val( syncInput.val() );
+                       }
+
+                       syncInput = control.widgetContentContainer.find( 'input[type=hidden].text' );
+                       if ( control.fields.text.is( ':visible' ) ) {
+                               if ( ! control.fields.text.is( document.activeElement ) ) {
+                                       control.fields.text.val( syncInput.val() );
+                               }
+                       } else if ( control.editor && ! control.editorFocused && syncInput.val() !== control.fields.text.val() ) {
+                               control.editor.setContent( wp.editor.autop( syncInput.val() ) );
+                       }
+               },
+
+               /**
+                * Initialize editor.
+                *
+                * @returns {void}
+                */
+               initializeEditor: function initializeEditor() {
+                       var control = this, changeDebounceDelay = 1000, id, textarea, restoreTextMode = false;
+                       textarea = control.fields.text;
+                       id = textarea.attr( 'id' );
+
+                       /**
+                        * Build (or re-build) the visual editor.
+                        *
+                        * @returns {void}
+                        */
+                       function buildEditor() {
+                               var editor, triggerChangeIfDirty, onInit;
+
+                               // Abort building if the textarea is gone, likely due to the widget having been deleted entirely.
+                               if ( ! document.getElementById( id ) ) {
+                                       return;
+                               }
+
+                               // Destroy any existing editor so that it can be re-initialized after a widget-updated event.
+                               if ( tinymce.get( id ) )    {
+                                       restoreTextMode = tinymce.get( id ).isHidden();
+                                       wp.editor.remove( id );
+                               }
+
+                               wp.editor.initialize( id, {
+                                       tinymce: {
+                                               wpautop: true
+                                       },
+                                       quicktags: true
+                               } );
+
+                               editor = window.tinymce.get( id );
+                               if ( ! editor ) {
+                                       throw new Error( 'Failed to initialize editor' );
+                               }
+                               onInit = function() {
+
+                                       // When a widget is moved in the DOM the dynamically-created TinyMCE iframe will be destroyed and has to be re-built.
+                                       $( editor.getWin() ).on( 'unload', function() {
+                                               _.defer( buildEditor );
+                                       });
+
+                                       // If a prior mce instance was replaced, and it was in text mode, toggle to text mode.
+                                       if ( restoreTextMode ) {
+                                               switchEditors.go( id, 'toggle' );
+                                       }
+                               };
+
+                               if ( editor.initialized ) {
+                                       onInit();
+                               } else {
+                                       editor.on( 'init', onInit );
+                               }
+
+                               control.editorFocused = false;
+                               triggerChangeIfDirty = function() {
+                                       var updateWidgetBuffer = 300; // See wp.customize.Widgets.WidgetControl._setupUpdateUI() which uses 250ms for updateWidgetDebounced.
+                                       if ( editor.isDirty() ) {
+
+                                               /*
+                                                * Account for race condition in customizer where user clicks Save & Publish while
+                                                * focus was just previously given to to the editor. Since updates to the editor
+                                                * are debounced at 1 second and since widget input changes are only synced to
+                                                * settings after 250ms, the customizer needs to be put into the processing
+                                                * state during the time between the change event is triggered and updateWidget
+                                                * logic starts. Note that the debounced update-widget request should be able
+                                                * to be removed with the removal of the update-widget request entirely once
+                                                * widgets are able to mutate their own instance props directly in JS without
+                                                * having to make server round-trips to call the respective WP_Widget::update()
+                                                * callbacks. See <https://core.trac.wordpress.org/ticket/33507>.
+                                                */
+                                               if ( wp.customize ) {
+                                                       wp.customize.state( 'processing' ).set( wp.customize.state( 'processing' ).get() + 1 );
+                                                       _.delay( function() {
+                                                               wp.customize.state( 'processing' ).set( wp.customize.state( 'processing' ).get() - 1 );
+                                                       }, updateWidgetBuffer );
+                                               }
+
+                                               editor.save();
+                                               textarea.trigger( 'change' );
+                                       }
+                               };
+                               editor.on( 'focus', function() {
+                                       control.editorFocused = true;
+                               } );
+                               editor.on( 'NodeChange', _.debounce( triggerChangeIfDirty, changeDebounceDelay ) );
+                               editor.on( 'blur', function() {
+                                       control.editorFocused = false;
+                                       triggerChangeIfDirty();
+                               } );
+
+                               control.editor = editor;
+                       }
+
+                       buildEditor();
+               }
+       });
+
+       /**
+        * Mapping of widget ID to instances of TextWidgetControl subclasses.
+        *
+        * @type {Object.<string, wp.textWidgets.TextWidgetControl>}
+        */
+       component.widgetControls = {};
+
+       /**
+        * Handle widget being added or initialized for the first time at the widget-added event.
+        *
+        * @param {jQuery.Event} event - Event.
+        * @param {jQuery}       widgetContainer - Widget container element.
+        * @returns {void}
+        */
+       component.handleWidgetAdded = function handleWidgetAdded( event, widgetContainer ) {
+               var widgetForm, idBase, widgetControl, widgetId, animatedCheckDelay = 50, widgetInside, 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();
+               if ( 'text' !== idBase ) {
+                       return;
+               }
+
+               // Prevent initializing already-added widgets.
+               widgetId = widgetForm.find( '> .widget-id' ).val();
+               if ( component.widgetControls[ widgetId ] ) {
+                       return;
+               }
+
+               widgetControl = new component.TextWidgetControl({
+                       el: widgetContainer
+               });
+
+               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 an iframe can be embedded
+                * with TinyMCE being able to set contenteditable on it.
+                */
+               widgetInside = widgetContainer.parent();
+               renderWhenAnimationDone = function() {
+                       if ( widgetInside.is( ':animated' ) ) {
+                               setTimeout( renderWhenAnimationDone, animatedCheckDelay );
+                       } else {
+                               widgetControl.initializeEditor();
+                       }
+               };
+               renderWhenAnimationDone();
+       };
+
+       /**
+        * 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.
+        *
+        * @param {jQuery.Event} event - Event.
+        * @param {jQuery}       widgetContainer - Widget container element.
+        * @returns {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 ( 'text' !== 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().
+        *
+        * @returns {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 );
+                       });
+               });
+       };
+
+       return component;
+})( jQuery );
</ins></span></pre></div>
<a id="trunksrcwpincludesdefaultfiltersphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/default-filters.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/default-filters.php 2017-05-11 18:40:17 UTC (rev 40630)
+++ trunk/src/wp-includes/default-filters.php   2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -164,7 +164,11 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'wp_sprintf', 'wp_sprintf_l', 10, 2 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-add_filter( 'widget_text', 'balanceTags' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+add_filter( 'widget_text',         'balanceTags'          );
+add_filter( 'widget_text_content', 'capital_P_dangit', 11 );
+add_filter( 'widget_text_content', 'wptexturize'          );
+add_filter( 'widget_text_content', 'convert_smilies',  20 );
+add_filter( 'widget_text_content', 'wpautop'              );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'date_i18n', 'wp_maybe_decline_date' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpincludesscriptloaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/script-loader.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/script-loader.php   2017-05-11 18:40:17 UTC (rev 40630)
+++ trunk/src/wp-includes/script-loader.php     2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -602,6 +602,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $scripts->add( 'admin-gallery', "/wp-admin/js/gallery$suffix.js", array( 'jquery-ui-sortable' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $scripts->add( 'admin-widgets', "/wp-admin/js/widgets$suffix.js", array( 'jquery-ui-sortable', 'jquery-ui-draggable', 'jquery-ui-droppable' ), false, 1 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $scripts->add( 'text-widgets', "/wp-admin/js/widgets/text-widgets$suffix.js", array( 'jquery', 'backbone', 'editor', 'wp-util' ) );
+               $scripts->add_inline_script( 'text-widgets', 'wp.textWidgets.init();', 'after' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $scripts->add( 'theme', "/wp-admin/js/theme$suffix.js", array( 'wp-backbone', 'wp-a11y' ), false, 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpincludeswidgetsclasswpwidgettextphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/widgets/class-wp-widget-text.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/widgets/class-wp-widget-text.php    2017-05-11 18:40:17 UTC (rev 40630)
+++ trunk/src/wp-includes/widgets/class-wp-widget-text.php      2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -28,11 +28,31 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'description' => __( 'Arbitrary text or HTML.' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'customize_selective_refresh' => true,
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $control_ops = array( 'width' => 400, 'height' => 350 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $control_ops = array(
+                       'width' => 400,
+                       'height' => 350,
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">                 parent::__construct( 'text', __( 'Text' ), $widget_ops, $control_ops );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Add hooks for enqueueing assets when registering all widget instances of this widget class.
+        *
+        * @since 4.8.0
+        * @access public
+        */
+       public function _register() {
+
+               // Note that the widgets component in the customizer will also do the 'admin_print_scripts-widgets.php' action in WP_Customize_Widgets::print_scripts().
+               add_action( 'admin_print_scripts-widgets.php', array( $this, 'enqueue_admin_scripts' ) );
+
+               // Note that the widgets component in the customizer will also do the 'admin_footer-widgets.php' action in WP_Customize_Widgets::print_footer_scripts().
+               add_action( 'admin_footer-widgets.php', array( $this, 'render_control_template_scripts' ) );
+
+               parent::_register();
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Outputs the content for the current Text widget instance.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 2.8.0
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -61,11 +81,34 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><span class="cx" style="display: block; padding: 0 10px">                $text = apply_filters( 'widget_text', $widget_text, $instance, $this );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                if ( isset( $instance['filter'] ) ) {
+                       if ( 'content' === $instance['filter'] ) {
+
+                               /**
+                                * Filters the content of the Text widget to apply changes expected from the visual (TinyMCE) editor.
+                                *
+                                * By default a subset of the_content filters are applied, including wpautop and wptexturize.
+                                *
+                                * @since 4.8.0
+                                *
+                                * @param string         $widget_text The widget content.
+                                * @param array          $instance    Array of settings for the current widget.
+                                * @param WP_Widget_Text $this        Current Text widget instance.
+                                */
+                               $text = apply_filters( 'widget_text_content', $widget_text, $instance, $this );
+
+                       } elseif ( $instance['filter'] ) {
+                               $text = wpautop( $text ); // Back-compat for instances prior to 4.8.
+                       }
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 echo $args['before_widget'];
</span><span class="cx" style="display: block; padding: 0 10px">                if ( ! empty( $title ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        echo $args['before_title'] . $title . $args['after_title'];
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                } ?>
-                       <div class="textwidget"><?php echo !empty( $instance['filter'] ) ? wpautop( $text ) : $text; ?></div>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         }
+
+               ?>
+                       <div class="textwidget"><?php echo $text; ?></div>
</ins><span class="cx" style="display: block; padding: 0 10px">                 <?php
</span><span class="cx" style="display: block; padding: 0 10px">                echo $args['after_widget'];
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -89,30 +132,73 @@
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><span class="cx" style="display: block; padding: 0 10px">                        $instance['text'] = wp_kses_post( $new_instance['text'] );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $instance['filter'] = ! empty( $new_instance['filter'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               /*
+                * Re-use legacy 'filter' (wpautop) property to now indicate content filters will always apply.
+                * Prior to 4.8, this is a boolean value used to indicate whether or not wpautop should be
+                * applied. By re-using this property, downgrading WordPress from 4.8 to 4.7 will ensure
+                * that the content for Text widgets created with TinyMCE will continue to get wpautop.
+                */
+               $instance['filter'] = 'content';
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return $instance;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Loads the required scripts and styles for the widget control.
+        *
+        * @since 4.8.0
+        * @access public
+        */
+       public function enqueue_admin_scripts() {
+               wp_enqueue_editor();
+               wp_enqueue_script( 'text-widgets' );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Outputs the Text widget settings form.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 2.8.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 4.8.0 Form only contains hidden inputs which are synced with JS template.
</ins><span class="cx" style="display: block; padding: 0 10px">          * @access public
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @see WP_Widget_Visual_Text::render_control_template_scripts()
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array $instance Current settings.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @return void
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><span class="cx" style="display: block; padding: 0 10px">        public function form( $instance ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $instance = wp_parse_args( (array) $instance, array( 'title' => '', 'text' => '' ) );
-               $filter = isset( $instance['filter'] ) ? $instance['filter'] : 0;
-               $title = sanitize_text_field( $instance['title'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $instance = wp_parse_args(
+                       (array) $instance,
+                       array(
+                               'title' => '',
+                               'text' => '',
+                       )
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">                 ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
-               <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /></p>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         <input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" class="title" type="hidden" value="<?php echo esc_attr( $instance['title'] ); ?>">
+               <input id="<?php echo $this->get_field_id( 'text' ); ?>" name="<?php echo $this->get_field_name( 'text' ); ?>" class="text" type="hidden" value="<?php echo esc_attr( $instance['text'] ); ?>">
+               <?php
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                <p><label for="<?php echo $this->get_field_id( 'text' ); ?>"><?php _e( 'Content:' ); ?></label>
-               <textarea class="widefat" rows="16" cols="20" id="<?php echo $this->get_field_id('text'); ?>" name="<?php echo $this->get_field_name('text'); ?>"><?php echo esc_textarea( $instance['text'] ); ?></textarea></p>
-
-               <p><input id="<?php echo $this->get_field_id('filter'); ?>" name="<?php echo $this->get_field_name('filter'); ?>" type="checkbox"<?php checked( $filter ); ?> />&nbsp;<label for="<?php echo $this->get_field_id('filter'); ?>"><?php _e('Automatically add paragraphs'); ?></label></p>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /**
+        * Render form template scripts.
+        *
+        * @since 4.8.0
+        * @access public
+        */
+       public function render_control_template_scripts() {
+               ?>
+               <script type="text/html" id="tmpl-widget-text-control-fields">
+                       <# var elementIdPrefix = 'el' + String( Math.random() ).replace( /\D/g, '' ) + '_' #>
+                       <p>
+                               <label for="{{ elementIdPrefix }}title"><?php esc_html_e( 'Title:' ); ?></label>
+                               <input id="{{ elementIdPrefix }}title" type="text" class="widefat title">
+                       </p>
+                       <p>
+                               <label for="{{ elementIdPrefix }}text" class="screen-reader-text"><?php esc_html_e( 'Content:' ); ?></label>
+                               <textarea id="{{ elementIdPrefix }}text" class="widefat text" style="height: 200px" rows="16" cols="20"></textarea>
+                       </p>
+               </script>
</ins><span class="cx" style="display: block; padding: 0 10px">                 <?php
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunittestswidgetstextwidgetphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/widgets/text-widget.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/widgets/text-widget.php                         (rev 0)
+++ trunk/tests/phpunit/tests/widgets/text-widget.php   2017-05-11 18:54:24 UTC (rev 40631)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,249 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Unit tests covering WP_Widget_Text functionality.
+ *
+ * @package    WordPress
+ * @subpackage widgets
+ */
+
+/**
+ * Test wp-includes/widgets/class-wp-widget-text.php
+ *
+ * @group widgets
+ */
+class Test_WP_Widget_Text extends WP_UnitTestCase {
+       /**
+        * Args passed to the widget_text filter.
+        *
+        * @var array
+        */
+       protected $widget_text_args;
+
+       /**
+        * Args passed to the widget_text_content filter.
+        *
+        * @var array
+        */
+       protected $widget_text_content_args;
+
+       /**
+        * Clean up global scope.
+        *
+        * @global WP_Scripts $wp_scripts
+        * @global WP_Styles  $wp_style
+        */
+       function clean_up_global_scope() {
+               global $wp_scripts, $wp_styles;
+               parent::clean_up_global_scope();
+               $wp_scripts = null;
+               $wp_styles = null;
+       }
+
+       /**
+        * Test enqueue_admin_scripts method.
+        *
+        * @covers WP_Widget_Text::_register
+        */
+       function test__register() {
+               set_current_screen( 'widgets.php' );
+               $widget = new WP_Widget_Text();
+               $widget->_register();
+
+               $this->assertEquals( 10, has_action( 'admin_print_scripts-widgets.php', array( $widget, 'enqueue_admin_scripts' ) ) );
+               $this->assertEquals( 10, has_action( 'admin_footer-widgets.php', array( $widget, 'render_control_template_scripts' ) ) );
+       }
+
+       /**
+        * Test widget method.
+        *
+        * @covers WP_Widget_Text::widget
+        */
+       function test_widget() {
+               $widget = new WP_Widget_Text();
+               $text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.\n Praesent ut turpis consequat lorem volutpat bibendum vitae vitae ante.";
+
+               $args = array(
+                       'before_title'  => '<h2>',
+                       'after_title'   => "</h2>\n",
+                       'before_widget' => '<section>',
+                       'after_widget'  => "</section>\n",
+               );
+               $instance = array(
+                       'title'  => 'Foo',
+                       'text'   => $text,
+                       'filter' => false,
+               );
+
+               add_filter( 'widget_text_content', array( $this, 'filter_widget_text_content' ), 10, 3 );
+               add_filter( 'widget_text', array( $this, 'filter_widget_text' ), 10, 3 );
+
+               // Test with filter=false.
+               ob_start();
+               $widget->widget( $args, $instance );
+               $output = ob_get_clean();
+               $this->assertNotContains( '<p>', $output );
+               $this->assertNotContains( '<br />', $output );
+               $this->assertEmpty( $this->widget_text_content_args );
+               $this->assertNotEmpty( $this->widget_text_args );
+
+               // Test with filter=true.
+               $instance['filter'] = true;
+               ob_start();
+               $widget->widget( $args, $instance );
+               $output = ob_get_clean();
+               $this->assertContains( '<p>', $output );
+               $this->assertContains( '<br />', $output );
+               $this->assertNotEmpty( $this->widget_text_args );
+               $this->assertEquals( $instance['text'], $this->widget_text_args[0] );
+               $this->assertEquals( $instance, $this->widget_text_args[1] );
+               $this->assertEquals( $widget, $this->widget_text_args[2] );
+               $this->assertEmpty( $this->widget_text_content_args );
+
+               // Test with filter=content, the upgraded widget.
+               $instance['filter'] = 'content';
+               ob_start();
+               $widget->widget( $args, $instance );
+               $output = ob_get_clean();
+               $this->assertContains( '<p>', $output );
+               $this->assertContains( '<br />', $output );
+               $this->assertCount( 3, $this->widget_text_args );
+               $this->assertEquals( $instance['text'], $this->widget_text_args[0] );
+               $this->assertEquals( $instance, $this->widget_text_args[1] );
+               $this->assertEquals( $widget, $this->widget_text_args[2] );
+               $this->assertCount( 3, $this->widget_text_content_args );
+               $this->assertEquals( wpautop( $instance['text'] ), $this->widget_text_content_args[0] );
+               $this->assertEquals( $instance, $this->widget_text_content_args[1] );
+               $this->assertEquals( $widget, $this->widget_text_content_args[2] );
+       }
+
+       /**
+        * Filters the content of the Text widget.
+        *
+        * @param string         $widget_text The widget content.
+        * @param array          $instance    Array of settings for the current widget.
+        * @param WP_Widget_Text $widget      Current Text widget instance.
+        * @return string Widget text.
+        */
+       function filter_widget_text( $widget_text, $instance, $widget ) {
+               $this->widget_text_args = func_get_args();
+
+               return $widget_text;
+       }
+
+       /**
+        * Filters the content of the Text widget to apply changes expected from the visual (TinyMCE) editor.
+        *
+        * @param string         $widget_text The widget content.
+        * @param array          $instance    Array of settings for the current widget.
+        * @param WP_Widget_Text $widget      Current Text widget instance.
+        * @return string Widget content.
+        */
+       function filter_widget_text_content( $widget_text, $instance, $widget ) {
+               $this->widget_text_content_args = func_get_args();
+
+               return $widget_text;
+       }
+
+       /**
+        * Test update method.
+        *
+        * @covers WP_Widget_Text::update
+        */
+       function test_update() {
+               $widget = new WP_Widget_Text();
+               $instance = array(
+                       'title' => "The\nTitle",
+                       'text'  => "The\n\nText",
+                       'filter' => false,
+               );
+
+               wp_set_current_user( $this->factory()->user->create( array(
+                       'role' => 'administrator',
+               ) ) );
+
+               // Should return valid instance.
+               $expected = array(
+                       'title'  => sanitize_text_field( $instance['title'] ),
+                       'text'   => $instance['text'],
+                       'filter' => 'content',
+               );
+               $result = $widget->update( $instance, array() );
+               $this->assertEquals( $result, $expected );
+               $this->assertTrue( ! empty( $expected['filter'] ), 'Expected filter prop to be truthy, to handle case where 4.8 is downgraded to 4.7.' );
+
+               // Make sure KSES is applying as expected.
+               add_filter( 'map_meta_cap', array( $this, 'grant_unfiltered_html_cap' ), 10, 2 );
+               $this->assertTrue( current_user_can( 'unfiltered_html' ) );
+               $instance['text'] = '<script>alert( "Howdy!" );</script>';
+               $expected['text'] = $instance['text'];
+               $result = $widget->update( $instance, array() );
+               $this->assertEquals( $result, $expected );
+
+               remove_filter( 'map_meta_cap', array( $this, 'grant_unfiltered_html_cap' ) );
+               add_filter( 'map_meta_cap', array( $this, 'revoke_unfiltered_html_cap' ), 10, 2 );
+               $this->assertFalse( current_user_can( 'unfiltered_html' ) );
+               $instance['text'] = '<script>alert( "Howdy!" );</script>';
+               $expected['text'] = wp_kses_post( $instance['text'] );
+               $result = $widget->update( $instance, array() );
+               $this->assertEquals( $result, $expected );
+               remove_filter( 'map_meta_cap', array( $this, 'revoke_unfiltered_html_cap' ), 10, 2 );
+       }
+
+       /**
+        * Grant unfiltered_html cap via map_meta_cap.
+        *
+        * @param array  $caps    Returns the user's actual capabilities.
+        * @param string $cap     Capability name.
+        * @return array Caps.
+        */
+       function grant_unfiltered_html_cap( $caps, $cap ) {
+               if ( 'unfiltered_html' === $cap ) {
+                       $caps = array_diff( $caps, array( 'do_not_allow' ) );
+                       $caps[] = 'unfiltered_html';
+               }
+               return $caps;
+       }
+
+       /**
+        * Revoke unfiltered_html cap via map_meta_cap.
+        *
+        * @param array  $caps    Returns the user's actual capabilities.
+        * @param string $cap     Capability name.
+        * @return array Caps.
+        */
+       function revoke_unfiltered_html_cap( $caps, $cap ) {
+               if ( 'unfiltered_html' === $cap ) {
+                       $caps = array_diff( $caps, array( 'unfiltered_html' ) );
+                       $caps[] = 'do_not_allow';
+               }
+               return $caps;
+       }
+
+       /**
+        * Test enqueue_admin_scripts method.
+        *
+        * @covers WP_Widget_Text::enqueue_admin_scripts
+        */
+       function test_enqueue_admin_scripts() {
+               set_current_screen( 'widgets.php' );
+               $widget = new WP_Widget_Text();
+               $widget->enqueue_admin_scripts();
+
+               $this->assertTrue( wp_script_is( 'text-widgets' ) );
+       }
+
+       /**
+        * Test render_control_template_scripts method.
+        *
+        * @covers WP_Widget_Text::render_control_template_scripts
+        */
+       function test_render_control_template_scripts() {
+               $widget = new WP_Widget_Text();
+
+               ob_start();
+               $widget->render_control_template_scripts();
+               $output = ob_get_clean();
+
+               $this->assertContains( '<script type="text/html" id="tmpl-widget-text-control-fields">', $output );
+       }
+}
</ins></span></pre>
</div>
</div>

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