Drag & Drop of <div> elements inside a text area or contenteditable

Unfortunately gwt-dnd seems not to support something like a controller for text areas with draggable elements. What I am looking for is a way to move e.g. a <div> to another position inside the text:

This (is) Sparta!

to for example

This Sparta (is)!

where (is) is actually a <div> element that is placed inside a <div contenteditable="true>.

Is there a chance that such a feature may come in the future?

[matheo]

Have you figured this out?
Any advice will be appreciated please