Re: feature/icomplete-vertical

[Gregory Heytings]

> > If an application wants to fit the buffer in the window, or display 
> > some hint about truncation, it's the application's business to do these 
> > things.
>
> I guess you can argue that, but this implies there are ways to predict 
> truncation (since being notified of it seems to be what you're opposed 
> to).
>
> So how is the application to know if its n lines, of lengths L = {l1, 
> ..., li, ..., ln}, it wants to display (not necessarily by buffer 
> insertion) in the mini-window need truncation and starting in which 
> line?  Does it need to perform calculations with max-mini-window-height? 
> If so, is there a "canonical" way to perform these calculations that 
> accounts for fontsizes, frame widths, etc?  To be clear, I find this 
> information useful for other domais, notably designing the way the Eldoc 
> should show information in the echo area.

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.