使用带有＆from指令的父函数进行自定义行为，但需要回调吗？

I'm trying to make a small directive that allows for either a simple text area, or an option that makes it a non-editable div until a pencil icon is clicked, at which point, the textarea is displayed so the content can be edited. Save functionality needs to be defined by the parent controller. I'm trying to make a small directive that allow