Re: x-dnd (drag and drop) fails on x86_64

[Jan D.]

Reiner Steib wrote:

> On Mon, Feb 07 2005, Jan D. wrote:
>
>  
>
> > Can you at all copy-paste between the browser and Emacs or do you
> > get truncated text if you mark text in the browser, select Copy from
> > the browser Edit menu and then select Paste from the Emacs Edit
> > menu?
> >    
>
> Works as it should.  It also works when just selecting the text (in
> Firefox) without using Edit/Copy (i.e. using the "PRIMARY
> selection"?).
>
> I noticed, that dragging from gedit (GNOME: text), kate (KDE: text)
> and konqueror (KDE: text and URLs) to Emacs (x86_64) works.  From all
> application including Firefox, dragging to Emacs (i686) works.

Emacs mishandles the case when it retreives (or sets) a property that 
has the format 32 bits on a machine that has a 64 bit long.  An Atom is 
such a property, and Atom:s are used to communicate during drag and 
drop.  Typically, Atoms tell Emacs which types the target can convert 
the thing being dragged to.  Emacs then selects one it can handle.  
Firefox has some strange types (_moz_...) in the first part of the list 
of types it supports.  But the bug in Emacs when used on AMD_64 (or any 
64 bit CPU) is that Emacs only gets half the list.  For Firefox, that 
results in no usable types, but for Kedit/Gedit/Konquerer Emacs can use 
the type that is first in the list, so the lost half isn't critical.

I have to review the whole selection/drag and drop/property handling in 
Emacs for this case.  Try again tomorrow, a fix should be checked in by 
then.

Thanks for debugging this,

   Jan D.

PS.  Can you resend the first mail with subject "[x86_64] abort in 
x_handle_selection_event when copying text", it looks like only the 
second where delivered.