Index: ../moodle-1910/lib/weblib.php
===================================================================
--- ../moodle-1910/lib/weblib.php	(revision )
+++ ../moodle-1910/lib/weblib.php	(revision )
@@ -5038,6 +5038,15 @@
             }
             $str .= ($scriptcount < 1) ? '<script type="text/javascript" src="'.
                     $CFG->httpswwwroot .'/lib/editor/htmlarea/lang/en.php?id='.$courseid.'"></script>'."\n" : '';
+
+            // load all custom HTMLAREA plugins
+            if (!empty($CFG->editor_customplugins) and $scriptcount < 1) {
+              $str .= '<script type="text/javascript" src="'.$CFG->wwwroot .'/lib/editor/htmlarea/custom_plugins/nbdialog.js"></script>'."\n";
+              foreach (explode(',',$CFG->editor_customplugins) as $plugin) {
+                $str .= '<script type="text/javascript" src="'.$CFG->wwwroot.'/lib/editor/htmlarea/custom_plugins/'.$plugin.'/opendialog.js.php?id='.$courseid.'"></script>'."\n";
+              }
+            }
+
             $scriptcount++;
 
             if ($height) {    // Usually with legacy calls
@@ -5086,7 +5095,7 @@
  * @param string $name Form element to replace with HTMl editor by name
  */
 function use_html_editor($name='', $editorhidebuttons='', $id='') {
-    global $THEME;
+    global $THEME,$CFG;
 
     $editor = 'editor_'.md5($name); //name might contain illegal characters
     if ($id === '') {
@@ -5099,6 +5108,18 @@
 
     echo print_editor_config($editorhidebuttons);
 
+    // load all custom HTMLAREA plugins
+    if (!empty($CFG->editor_customplugins)) {
+      echo "\n";$allplugins = '[';
+      foreach (explode(',',$CFG->editor_customplugins) as $plugin) {
+        echo 'config.registerButton("'.$plugin.'",  "'.get_string('pluginname',$plugin,'',$CFG->dirroot.'/lib/editor/htmlarea/custom_plugins/'.$plugin.'/lang/').'", "'.$CFG->wwwroot;
+          echo '/lib/editor/htmlarea/custom_plugins/'.$plugin.'/icon.png", false, __'.$plugin.');'."\n";
+        $allplugins .= '"'.$plugin.'",';
+      }
+      $allplugins = rtrim($allplugins,',').']';
+      echo 'config.toolbar.push('.$allplugins.');'."\n";
+    }
+
     if (empty($THEME->htmleditorpostprocess)) {
         if (empty($name)) {
             echo "\nHTMLArea.replaceAll($editor.config);\n";