[Usability] How should an editor behave when it comes to search and replace?

[Markus Bertheau ☭ <twanger bluetwanger de>]

Hi,

I'm writing a continuous-save, mom-friendly and plugin free text editor
for GNOME. I'd need interaction design advice on how a text editor
should behave when it comes to searching / searching and replacing. What
do you see as optimal behaviour for a text editor for GNOME in this
respect?

Thanks for your input

-- 
Markus Bertheau ☭ <twanger bluetwanger de>