Suggestion: Ignore opening a file twice

I occasionally run into the following problem with The Unarchiver: I double 
click an archive file 
and get the impression that I didn't double click correctly because The 
Unarchiver's window 
doesn't appear. So I double click the file again.

What happens then, is the following: My first double click was in fact a valid 
one, the system was 
just slow to launch the application because of swapping or the machine being 
busy and The 
Unarchiver ends up being asked to unarchive the same file twice. That doesn't 
make particularly 
much sense and fails as I have the application set up to trash the files after 
unarchiving, leading 
to an error message.

It'd be helpful if The Unarchiver just ignored files the system tells it to 
open if they are already in 
the queue for unarchiving (just as other applications will not open the same 
file twice but only 
bring them to the front if they are already open).

Original issue reported on code.google.com by cv4...@gmail.com on 22 Sep 2009 at 5:38

markcox / theunarchiver

Suggestion: Ignore opening a file twice #198