This is a follow up post on my previous post about a tree-view item picker. Right now, this Tridion GUI extension works well for rich text fields : when you click a button in the ribbon toolbar, you get a popup with a number of keywords, and when the user selects a keyword, some property of that keyword is inserted in the rich text field.
Now, the same functionality had to be achieved for regular text fields. Tridion has a lot functionality available for dealing with RTF fields, but extending this to regular text fields requires some extra custom coding