code_mirror: support for YAPF

bt5/erp5_code_mirror/SkinTemplateItem/portal_skins/erp5_code_mirror/code_mirror_support.txt

@@ -239,6 +239,25 @@
    function successHandler(data) {
      generateHistorySelectElement();
 
+     /* check getTextContent have not changed server side (for example YAPF) */
+     if (mode == 'python') {
+       $.ajax({
+         type: 'GET',
+         url: 'getTextContent',
+         success: function refreshTextContent(textContent) {
+           if (textContent !== cm.getValue()) {
+             if (cm.hasFocus()) {
+               const cursorPosition = cm.getCursor();
+               cm.setValue(textContent);
+               cm.setCursor(cursorPosition);
+             } else {
+               cm.setValue(textContent);
+             }
+           }
+         }
+       });
+     }
+
      transition_message = $('#transition_message');
      transition_message.css('opacity', 0.0);
      transition_message.html(data);