MDL-28987 Forms Library: Added tinyMCE onblur event callback for required tinymce fields

lib/editor/tinymce/module.js

@@ -72,3 +72,28 @@ M.editor_tinymce.filepicker = function(target_id, url, type, win) {
     });
 };
 
+M.editor_tinymce.onblur_event = function(ed) {
+    //Attach event only after tinymce is intialized.
+    if (ed.onInit != undefined) {
+        var s = ed.settings;
+        //Save before event is attached, so that if this event is not generated then textarea should
+        //have loaded contents and submitting form should not throw error.
+        ed.save();
+
+        //Attach blur event for tinymce to call onchange validation function of textarea.
+        var doc = s.content_editable ? ed.getBody() : (tinymce.isGecko ? ed.getDoc() : ed.getWin());
+        tinymce.dom.Event.add(doc, 'blur', function() {
+            //save contents to textarea before calling validation script.
+            ed.save();
+            var element = document.getElementById(ed.id);
+            element.onchange(element);
+        });
+
+        //Add an extra event to make sure after window is blurred because of user clicking
+        //out of tinymce or any popup occured, then error should be cleaned on focusing back.
+        tinymce.dom.Event.add(doc, 'focus', function() {
+            var element = document.getElementById(ed.id);
+            qf_errorHandler(element, '');
+        });
+    };
+};