bug#12419: Mouse click changes layout

[martin rudalics]

>> The example I gave should have told you.  Think of the bottom window as
>> the minibuffer window.
>
> I did.  And I see no problems with that.

You see no problem with minibuffer window resizing not restoring the
initial configuration?

>> I use ediff with the control panel on the bottom of the frame.  How can
>> I resize the minibuffer in this case?
>
> Why, by resizing the window above the control panel, of course.

And how would you size the minibuffer back?

> I
> didn't say it won't happen, I just said it will be rare, and therefore
> not a reason not to have that behavior.

OK.  Please try the patch below and tell me whether it does what you
want.

Thanks, martin

=== modified file 'lisp/window.el'
--- lisp/window.el      2012-09-09 06:43:47 +0000
+++ lisp/window.el      2012-09-15 09:26:32 +0000
@@ -2413,7 +2413,9 @@
       ;; So, in practice, we'd need a history variable to record how to
       ;; proceed.  But I'm not sure how such a variable could work with
       ;; repeated minibuffer window growing steps.
-      (window--resize-this-window window delta nil ignore t)
+      (window--resize-this-window
+       window delta nil ignore t 'before
+       (+ (window-top-line window) (window-total-size window)))
       delta)))

 (defun adjust-window-trailing-edge (window delta &optional horizontal)