[plt-scheme] Text% getting and setting text, images, etc.

At Fri, 14 Mar 2003 15:08:01 +0100, Erich Rast wrote:
> I need to re-implement all insert/copy/paste/undo/redo operations in a 
> text% subclass. However, I haven't yet figured out how to get and 
> insert editor data that may contain more than just text. Does 
> "flattened text" include subeditors and images? How would I insert 
> "flattened text" into the editor again?
> 
> I shouldn't really use on-copy and on-paste, because I also need to 
> save ranges of editor data for my own custom undo scheme. So what I'd 
> need is something like:
> 
> (get-rich-text start-position end-position) ==> rich text data or 
> whatever
> (insert-rich-text text-data position)
> 
> How to?

You need to work with snip% objects instead of strings. If you want
things marshalled, try working with the `write-to-file' method of text%
(which, despite its name, doesn't necessarily write to a file).

Matthew