bug#43572: Feature request: make it possible to choose whether the first lines of the minibuffer should be displayed instead of the last ones

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Wed, 23 Sep 2020 14:33:13 -0400
> Cc: 43572@debbugs.gnu.org
> 
> I don't have a patch to suggest, but I think ideally, I'd want clients
> like icomplete to tell the redisplay either something like "please
> display as much as possible of *this* chunk of text" or maybe "feel free
> not to display all of this overlay, it's not super important".
> 
> [ Note: "please display as much as possible of *this* chunk of text" is
>   what I'd want to do in diff-mode when I move between chunks or in
>   smerge-mode when I get to a new conflict, so maybe such a thing would
>   make sense not just in the minibuffer.  ]

This could be a useful new feature, but we still need to decide what
should the display engine do when the chunk of text marked with this
new indication (some text property, probably?) cannot all of it be
displayed.  Should it then display only its first part, only its last
part, something else?