Re: [patch] enhanced mac drag-n-drop

[Jan D.]

Jason Rumney wrote:

> "Jan D." <address@hidden> writes:
>
>  
>
> > We should break out what you can use in a general dnd.el file.  The
> > x-dnd.el currently contains both general DND handling and protocol
> > specifics. I'll look at what the w32 code uses and try to generalize
> > it more.
> >    
>
> The code is in term/w32-win.el. I only used one function from
> x-dnd.el, but I think I basically rewrote another function with minor
> changes, so it may be possible to generalize that. Also a full dnd
> implementation on w32 could probably use more from x-dnd.el if someone
> were to contribute the necessary COM code to generate the more complex
> events, so generalizing as much as you can would help in the long term.

I've done a small generalization, in the new file dnd.el.  The idea is 
that platform specific parts call functions in this file.  I've changed 
dired.el and w32-win.el (but not tested on w32).  I'm not sure how 
things work on w32, but I think dropping on a dired buffer will copy a 
file to the dired directory on w32 as well now.

The only thing a user can customize that is general on all platforms is 
the dnd-protocol-alist.  Now, I know that it is hard to cover all cases 
with such a simple selection mechanism,  For example, files may be image 
files, shall the image be created in Emacs?  What is the url of a sound 
clip that is dropped?

The X DND mechanism gives the types of items dropped, but I don't know 
what other platforms use for types, so it is hard for me to generalize 
this part.  And I don't want to add complexity until we need it.

   Jan D.