Re: moving window handling into lisp

[martin rudalics]

> Another approach is to have a transactional interface, like
> start-window-configuration and end-window-configuration:
> - during the transaction, windows can be resized to too-large/too-small
>   sizes (but maybe window-fixed-size should stil be obeyed?).

This would still rely on some predictable behavior of `enlarge-window',
`adjust-window-trailing-edge' and `size_window'.  I suppose we should
merge these functions into one Elisp function that moves the trailing
edge of a window and have one C function checking whether the resulting
window tree is well-formed and, if that is the case, apply the change.

martin