Re: [elpa] master a94ca83 01/18: swiper.el: Add a work-around for window-start not being current

[Oleh Krehel <ohwoeowho@gmail.com>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>     An alternative would be to use `redisplay' to update `window-start' and
>>     `window-end', but that causes excessive blinking.
>
> Yes, this sucks.  Currently, I think the best mechanism in Emacs to
> perform such highlighting is fontification-functions, but that is used
> by jit-lock.  So you could use jit-lock-register, but it would cause
> re-font-locking the (visible part of) the buffer, which also sucks.
>
> jit-lock should ideally be extended to better deal with "multiple
> clients" so that it is able to understand that some parts of the buffer
> have already been handled by some clients (currently, it's all or
> nothing: either jit-lock thinks that a part of the buffer has been
> handled by all clients, or it thinks that it's been handled by none).

It's not a big deal for swiper: in this case, just double the window
height gets overlays, instead of single window height.
The advantage is that I don't have to deal with callbacks and sequencing.

Oleh