Block Editor: Second batch of fixes for 5.8 beta 2

This includes:

 - Fix regression emptying post content block in template mode.
 - Legacy Widget: Don't display "No preview" when widget has image tags.

See #53397. 

Built from https://develop.svn.wordpress.org/trunk@51156


git-svn-id: http://core.svn.wordpress.org/trunk@50765 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/dist/block-library.js

@@ -30410,12 +30410,11 @@ const postTitle = Object(external_wp_element_["createElement"])(external_wp_prim
  *
  * @param {string} kind     Entity kind.
  * @param {string} name     Entity name.
- * @param {number} key      Record's key.
  * @param {string} recordId Record's id.
  */
 
-function useCanEditEntity(kind, name, key, recordId) {
-  return Object(external_wp_data_["useSelect"])(select => select(external_wp_coreData_["store"]).canUserEditEntityRecord(kind, name, key, recordId), [kind, name, key, recordId]);
+function useCanEditEntity(kind, name, recordId) {
+  return Object(external_wp_data_["useSelect"])(select => select(external_wp_coreData_["store"]).canUserEditEntityRecord(kind, name, recordId), [kind, name, recordId]);
 }
 /* harmony default export */ var utils_hooks = ({
   useCanEditEntity
@@ -30461,7 +30460,7 @@ function PostTitleEdit({
 }) {
   const TagName = 0 === level ? 'p' : 'h' + level;
   const isDescendentOfQueryLoop = !!queryId;
-  const userCanEdit = useCanEditEntity('root', 'postType', postType, postId);
+  const userCanEdit = useCanEditEntity('postType', postType, postId);
   const [rawTitle = '', setTitle, fullTitle] = Object(external_wp_coreData_["useEntityProp"])('postType', postType, 'title', postId);
   const [link] = Object(external_wp_coreData_["useEntityProp"])('postType', postType, 'link', postId);
   const blockProps = Object(external_wp_blockEditor_["useBlockProps"])({
@@ -30650,9 +30649,12 @@ function ReadOnlyContent({
 
 function EditableContent({
   layout,
+  context = {}
+}) {
+  const {
     postType,
     postId
-}) {
+  } = context;
   const themeSupportsLayout = Object(external_wp_data_["useSelect"])(select => {
     var _getSettings;
 
@@ -30704,7 +30706,7 @@ function Content(props) {
     } = {}
   } = props;
   const isDescendentOfQueryLoop = !!queryId;
-  const userCanEdit = useCanEditEntity('root', 'postType', postType, postId);
+  const userCanEdit = useCanEditEntity('postType', postType, postId);
   const isEditable = userCanEdit && !isDescendentOfQueryLoop;
   return isEditable ? Object(external_wp_element_["createElement"])(EditableContent, props) : Object(external_wp_element_["createElement"])(ReadOnlyContent, {
     userCanEdit: userCanEdit,
@@ -31027,7 +31029,7 @@ function PostExcerptEditor({
   }
 }) {
   const isDescendentOfQueryLoop = !!queryId;
-  const userCanEdit = useCanEditEntity('root', 'postType', postType, postId);
+  const userCanEdit = useCanEditEntity('postType', postType, postId);
   const isEditable = userCanEdit && !isDescendentOfQueryLoop;
   const [rawExcerpt, setExcerpt, {
     rendered: renderedExcerpt,

wp-includes/js/dist/core-data.js

@@ -2044,7 +2044,8 @@ function* loadPostTypeEntities() {
 
         return (record === null || record === void 0 ? void 0 : (_record$title = record.title) === null || _record$title === void 0 ? void 0 : _record$title.rendered) || (record === null || record === void 0 ? void 0 : record.title) || (isTemplate ? Object(external_lodash_["startCase"])(record.slug) : String(record.id));
       },
-      __unstablePrePersist: isTemplate ? undefined : prePersistPostType
+      __unstablePrePersist: isTemplate ? undefined : prePersistPostType,
+      __unstable_rest_base: postType.rest_base
     };
   });
 }
@@ -3865,15 +3866,19 @@ function canUser(state, action, resource, id) {
  * @param {Object} state    Data state.
  * @param {string} kind     Entity kind.
  * @param {string} name     Entity name.
- * @param {number} key Record's key.
  * @param {string} recordId Record's id.
  * @return {boolean|undefined} Whether or not the user can edit,
  * or `undefined` if the OPTIONS request is still being made.
  */
 
-function canUserEditEntityRecord(state, kind, name, key, recordId) {
-  const entity = getEntityRecord(state, kind, name, key);
-  const resource = (entity === null || entity === void 0 ? void 0 : entity.rest_base) || '';
+function canUserEditEntityRecord(state, kind, name, recordId) {
+  const entity = getEntity(state, kind, name);
+
+  if (!entity) {
+    return false;
+  }
+
+  const resource = entity.__unstable_rest_base;
   return canUser(state, 'update', resource, recordId);
 }
 /**
@@ -4327,13 +4332,21 @@ function* resolvers_canUser(action, resource, id) {
  *
  * @param {string} kind     Entity kind.
  * @param {string} name     Entity name.
- * @param {number} key Record's key.
  * @param {string} recordId Record's id.
  */
 
-function* resolvers_canUserEditEntityRecord(kind, name, key, recordId) {
-  const entity = yield external_wp_data_["controls"].select('core', 'getEntityRecord', kind, name, key);
-  const resource = (entity === null || entity === void 0 ? void 0 : entity.rest_base) || '';
+function* resolvers_canUserEditEntityRecord(kind, name, recordId) {
+  const entities = yield getKindEntities(kind);
+  const entity = Object(external_lodash_["find"])(entities, {
+    kind,
+    name
+  });
+
+  if (!entity) {
+    return;
+  }
+
+  const resource = entity.__unstable_rest_base;
   yield resolvers_canUser('update', resource, recordId);
 }
 /**

wp-includes/js/dist/edit-post.js

@@ -14675,6 +14675,40 @@ function EditTemplateTitle() {
   });
 }
 
+// CONCATENATED MODULE: ./node_modules/@wordpress/edit-post/build-module/components/header/template-title/template-description.js
+
+
+/**
+ * WordPress dependencies
+ */
+
+
+/**
+ * Internal dependencies
+ */
+
+
+function TemplateDescription() {
+  const {
+    description
+  } = Object(external_wp_data_["useSelect"])(select => {
+    const {
+      getEditedPostTemplate
+    } = select(store["a" /* store */]);
+    return {
+      description: getEditedPostTemplate().description
+    };
+  }, []);
+
+  if (!description) {
+    return null;
+  }
+
+  return Object(external_wp_element_["createElement"])(external_wp_components_["__experimentalText"], {
+    size: "body"
+  }, description);
+}
+
 // CONCATENATED MODULE: ./node_modules/@wordpress/edit-post/build-module/components/header/template-title/index.js
 
 
@@ -14696,6 +14730,7 @@ function EditTemplateTitle() {
 
 
 
+
 function TemplateTitle() {
   const {
     template,
@@ -14763,7 +14798,7 @@ function TemplateTitle() {
         onClick: onToggle,
         label: Object(external_wp_i18n_["__"])('Template Options')
       }), templateTitle)),
-      renderContent: () => Object(external_wp_element_["createElement"])(external_wp_element_["Fragment"], null, Object(external_wp_element_["createElement"])(EditTemplateTitle, null), Object(external_wp_element_["createElement"])(DeleteTemplate, null))
+      renderContent: () => Object(external_wp_element_["createElement"])(external_wp_element_["Fragment"], null, template.has_theme_file ? Object(external_wp_element_["createElement"])(TemplateDescription, null) : Object(external_wp_element_["createElement"])(EditTemplateTitle, null), Object(external_wp_element_["createElement"])(DeleteTemplate, null))
     });
   });
 }

wp-includes/js/dist/widgets.js

@@ -666,7 +666,33 @@ async function encodeWidget({
 function isEmptyHTML(html) {
   const element = document.createElement('div');
   element.innerHTML = html;
-  return element.innerText.trim() === '';
+  return isEmptyNode(element);
+}
+
+function isEmptyNode(node) {
+  switch (node.nodeType) {
+    case node.TEXT_NODE:
+      // Text nodes are empty if it's entirely whitespace.
+      return node.nodeValue.trim() === '';
+
+    case node.ELEMENT_NODE:
+      // Elements that are "embedded content" are not empty.
+      // https://dev.w3.org/html5/spec-LC/content-models.html#embedded-content-0
+      if (['AUDIO', 'CANVAS', 'EMBED', 'IFRAME', 'IMG', 'MATH', 'OBJECT', 'SVG', 'VIDEO'].includes(node.tagName)) {
+        return false;
+      } // Elements with no children are empty.
+
+
+      if (!node.hasChildNodes()) {
+        return true;
+      } // Elements with children are empty if all their children are empty.
+
+
+      return Array.from(node.childNodes).every(isEmptyNode);
+
+    default:
+      return true;
+  }
 }
 
 function serializeForm(form) {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-beta1-51155';
+$wp_version = '5.8-beta1-51156';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.