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

        if (parentRole == "tablist") {
          moveFocus(-1, getFocusElements(focusedElement.parentNode));
        } else if (focusedControl.parent().submenu) {
          cancel();
        } else {
          moveFocus(-1);
        }
      }
function left() {
        var parentRole = getParentRole();

        if (parentRole == "tablist") {
          moveFocus(-1, getFocusElements(focusedElement.parentNode));
        } else if (focusedControl.parent().submenu) {
          cancel();
        } else {
          moveFocus(-1);
        }
      }
function left ( ) { var parentRole = getParentRole ( ) ; if ( parentRole == "tablist" ) { moveFocus ( - 1 , getFocusElements ( focusedElement . parentNode ) ) ; } else if ( focusedControl . parent ( ) . submenu ) { cancel ( ) ; } else { moveFocus ( - 1 ) ; } }
Moves the focus to the left this is called by the left key.

@private
Moves the focus to the left this is called by the left key .