Re: feature/icomplete-vertical

[Gregory Heytings via "Emacs development discussions." <emacs-devel@gnu.org>]

>> This is feasible, but IMHO very (and needlessly) difficult.  Basically 
>> you need to work with pixel dimensions, and recalculate everything 
>> manually: first calculate the (maximal) size of the miniwindow (given 
>> the user preferences, in particular max-mini-window-height), then 
>> calculate the size of its contents with window-text-pixel-size.  You 
>> should add one character (or line) at at time, and recalculate the new 
>> size each time.
>
> Yes, as far as I understand, in the general case, it must be one 
> character at a time, since each character might have a different pixel 
> width.  At some point there is a cutoff and things are not displayed 
> anymore.  I was hoping that that knowledge, which is held somehere in 
> the system at some point, could be imparted to the application.
>
> Anyway, whatever the mechanism (notification or painstaking 
> calculation), we should first write a function that does this.  That is 
> the bugfix in my opinion.  Then we can work on simplifying that 
> function's implementation, if it turns out to be slow or problematic.
>

There is no need to calculate anything with the 
"start-display-at-beginning-of-minibuffer" solution I sent a few hours 
ago.  Emacs does everything for you, at no cost.

Or is there something that you need (e.g. for Eldoc) and that this 
solution does not do?