Re: [PATCH] Support "\n" in icomplete-separator

[Gregory Heytings]

> > > If an application has a truly expandable minibuffer window or a normal 
> > > window at its hands, it can try to show completions vertically.  With 
> > > the default minibuffer window, it should always behave as if only one 
> > > line were available.
> >
> > Why?  The default value for max-mini-window-height is 0.25 (at least 
> > since Emacs 21), which means that in a default 80x24 terminal the 
> > minibuffer can be 6 lines tall.
>
> I explained earlier why this is not generally true.  Have a look at the 
> code of 'window--resize-root-window-vertically'.

Yes of course, you are correct, it is not always true that the minibuffer 
can be expanded to 0.25 * frame-height.  I should have said "which means 
that in a default 80x24 terminal the minibuffer can _normally_ be 6 lines 
tall."

The exceptions are however orthogonal to the request to give applications 
the control on how the contents of the minibuffer should preferably be 
displayed: should it preferably start at the beginning of buffer 
(point-min), or should it preferably start at the beginning of the line on 
which the cursor is?  ATM the latter behavior is the only possibility 
(except with the code I sent to Andrii yesterday).