bug#12872: 24.2; Provide a feature to trigger mode-line redisplay

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> This function could grow a `mode-line-only' parameter (or value of ALL),
>> I guess.  Hm...  following the logic here isn't trivial.  Would setting
>> a new flag in the window object that'll make redisplay call
>> redisplay_mode_lines be a way to implement this?
>
> We already have the flag.

What flag is that?

> The problem is how to set it only when the current line changes.  I
> think that's the crux of this issue.

I must admit I didn't understand what was meant by "when the current
line changes".  😐

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