Re: MY window tree!

["Lennart Borgman (gmail)" <lennart.borgman@gmail.com>]

martin rudalics wrote:
>  > I've been playing around with window-tree to do the following :
>  > - On M-x foo, a window is created on the extreme left of the frame,
>  > containing a buffer called *Bar*,
>  > - On M-x foo again, with the buffer *Bar* on the left, this window is
>  > removed.
>  >
>  > Problem is, this can't be done with a simple split. So my first idea
>  > was to reduce the frame to one window, split it: left would be *Bar*
>  > and restore the window-tree in the right part.
>  >
>  > Of course, this can't work, because if I use delete-other-windows, the
>  > windows are ... deleted. So, can't be restored.
>  >
>  > I can't find a way to do this simply, and I wonder if there is :-)
> 
> Don't wonder: You first have to save the window-list of the frame
> including all windows' edges and identities.  Next you have to create the
> *Bar* window with the intended width and split the window on the right
> in the way listed by the saved window-list, adjust the vertical dividers
> proportionally to what you had before (there's always a chance that a
> window drops below the minimum width now) and assign any window-local
> overlays the identity of their new window.  In addition there might be
> dedicated windows and other window-local properties as well ...
> 
> I once struggled a lot with the much simpler problem of a window
> configuration like
> 
>  ----------
> | |        |
> |1|   2    |
> | |        |
>  ----------
> 
> I wanted to transform into
> 
>  ----------
> |1|   2    |
> |----------|
> |   3      |
>  ----------
> 
> If you come up with a solution to your problem I'd definitely want to
> hear about it ;-)


I have uploaded a preliminary version of winsav.el to

   http://ourcomments.org/Emacs/DL/elisp/test/winsav.el