Re: are there hooks for text becoming visible or hidden in a given window?

[Michael Heerdegen]

Thomas Lord <lord@basiscraft.com> writes:

> I couldn't find anything like this and I don't see a clean
> alternative.

Reminds me of the task I had to solve when implementing "on-screen.el" -
a package that indicates the formerly visible region after scrolling a
window.  What you want is nearly the same: observe the visible region of
a window, do something (involving redisplay) when it changes.

It was surprisingly tricky to do.  I didn't use jit-lock, I used hooks.

Dunno if the solution I implemented is a good one, aesthetically, but it
worked reliably over the years, so that approach is somewhat tested.

Michael.