Re: mouse-drag-mode-line should maybe use window-tree

[Lennart Borgman]

Richard M. Stallman wrote:

>    Looking a bit at `mouse-drag-mode-line' I found that it in certain 
>    window configuration might fail because it does not seem aware of that 
>    window splitting is two dimensional.
>
> Could you please be more specific?
Sorry, forgot to write that it is the code in `mouse-drag-window-above' 
that looks suspicious to me. It seems like it only compares the top of 
the parameter window with the bottom of other windows. Maybe that could 
fail, I am not sure. If the code is correct it must depend on the order 
in which `previous-window' returns the windows.

I have not however been able to find a window configuration where it 
fails so I guess that the code is correct. But maybe it deserves a 
comment in `mouse-drag-window-above'?