XWIKI-22746: Images do not have an aria-label in the xwiki-slash dropdown for CKEditor

xwiki-platform-core/xwiki-platform-ckeditor/xwiki-platform-ckeditor-plugins/src/main/webjar/xwiki-slash/autocomplete.css

@@ -0,0 +1,34 @@
+/*
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+
+/* We hide completely icons in the CKEditor autocomplete items that are not used and therefore empty.
+  This is especially important for assistive tech users (regular users cannot see the image if there's no source).
+  Note that this extra style is required because the itemTemplate feature of CKEditor autocomplete 
+  is not powerful enough to support our specific usecase. 
+  since 16.10.3
+  */
+.ckeditor-autocomplete-item-head {
+  & img[src=""],
+  & img:not([src]),
+  & .ckeditor-autocomplete-item-icon-wrapper > span[class=""],
+  & .ckeditor-autocomplete-item-icon-wrapper > span:not([class]) {
+    display: none;
+  }
+}