MDL-76229 core_form: Show frozen text editor in a more accessible way.

lib/form/editor.php

@@ -248,6 +248,15 @@ class MoodleQuickForm_editor extends HTML_QuickForm_element implements templatab
         $this->_options['subdirs'] = (int)($allow == 1);
     }
 
+    /**
+     * Returns editor text content
+     *
+     * @return string Text content
+     */
+    public function get_text(): string {
+        return $this->_values['text'];
+    }
+
     /**
      * Returns editor format
      *
@@ -491,13 +500,12 @@ class MoodleQuickForm_editor extends HTML_QuickForm_element implements templatab
     }
 
     /**
-     * What to display when element is frozen.
+     * Returns the formatted value. The return from parent class is not acceptable.
      *
-     * @return empty string
+     * @return string
      */
-    function getFrozenHtml() {
+    public function getFrozenHtml(): string {
-
+        return format_text($this->get_text(), $this->getFormat()) . $this->_getPersistantData();
-        return '';
     }
 
     /**