bug#30929: 26.0.91; Text drag and drop does not work

[Alan Third]

On Mon, Jan 07, 2019 at 11:38:33PM +1300, Nick Helm wrote:
> 
> I like the default modifier actions - they match how drag and drop works
> on my other apps. I was worried having the modifiers independent of the
> Emacs modifiers might be a bit confusing with non-default bindings, but
> in practice it doesn't cause me any trouble.

Excellent.

> I also tried as many different dnd operations as I could think of. They
> all worked as expected except one - when I try to open a malformed URL
> Emacs creates a spurious buffer and freezes momentarily (C-g to clear).
> Specifically, I selected the text "file://~/test.txt" in TextEdit.app
> and dropped it into Emacs with Alt/Opt held down. Properly formed URLs
> work as expected and open the file.

I’ve dug into this a bit and I think that’s actually a valid URL as
far as Emacs is concerned. I’m not sure what protocol it’s trying to
use, but it matches the form file://hostname/filename. I assume the
freeze you see is it doing a lookup and if left long enough it will
time out (although it’s an extraordinarily long timeout if true).

I’ll push this to master now.
-- 
Alan Third