Re: Infrastructural complexity.

[martin rudalics]

> How 'bout: bind a enlarge-window-abort-before-delete variable to
> t in adjust-window-trailing-edge, and then check this variable before
> deleting a window?

Not really.  Enlarging a window means stealing space from others and
size_window might already have stolen space from windows before it tries
to delete one.  With a DELTA > 1 this might leave the frame in an
inconsistent state.  That is, a window that shall be enlarged vertically
might have grown by a couple of lines but not the entire DELTA when the
action must be aborted.

>> Currently, `adjust-window-trailing-edge' has a bug in that it does not
>> handle fixed-size windows correctly, see bug#3689.  I think we need an
>> `enlarge-window' function which does not delete windows but is allowed
>> to resize any other windows that are not fixed-size.
>
> 100% agreement.

Writing such a function is not entirely trivial.  I suppose we'd have to
run the function without actually changing anything first and, if we
succeeded in not deleting any windows, apply the actual changes.

martin