tinymce.full.js
function tab(e) {
        var parentRole = getParentRole();

        if (parentRole == "tablist") {
          var elm = getFocusElements(focusedControl.getEl('body'))[0];

          if (elm) {
            elm.focus();
          }
        } else {
          moveFocus(e.shiftKey ? -1 : 1);
        }
      }
function tab(e) {
        var parentRole = getParentRole();

        if (parentRole == "tablist") {
          var elm = getFocusElements(focusedControl.getEl('body'))[0];

          if (elm) {
            elm.focus();
          }
        } else {
          moveFocus(e.shiftKey ? -1 : 1);
        }
      }
function tab ( e ) { var parentRole = getParentRole ( ) ; if ( parentRole == "tablist" ) { var elm = getFocusElements ( focusedControl . getEl ( 'body' ) ) [ 0 ] ; if ( elm ) { elm . focus ( ) ; } } else { moveFocus ( e . shiftKey ? - 1 : 1 ) ; } }
Moves the focus to the next item or previous item depending on shift key.

@private
@param {DOMEvent} e DOM event object.
Moves the focus to the next item or previous item depending on shift key .