swiper.el (swiper--ivy) Add integration with evil s expressions

[YourFin]

I.e. searching for apple with swiper and then running
:s//orange/g will replace all apples on the line with oranges as
expected. Evil uses the value of `isearch-string' for this
completion, hence it's inclusion.

[manuel-uberti]

Minor nit-picking: is it necessary to have the comment on three different lines?

[abo-abo]

Thanks. I adjusted your commit a bit. I'm pretty sure ivy-text never has any string properties.

[YourFin]

Looking back at why I had that in, I originally had this on some advice to swiper, and used swiper-history as the source, which does have text properties that it manages to acquire somewhere; I thought that was part of ivy, but apparently not.

Thanks again for your wonderful work!

[edkolev]

@YourFin the code which does this for evil-mode's evil-search module is here, in swiper--action: https://github.com/YourFin/swiper/blob/fbc72a9a6dd1cc35ae855a2cac65eecacbcb5d01/swiper.el#L746

I would suggest you move the newly added code in swiper--action and maybe tweak it a bit:

(when (and (bound-and-true-p evil-mode) (eq evil-search-module 'isearch))
        (setq isearch-string (substring-no-properties ivy-text)))

As a result, all the code dealing with evil's search integration (be it evil-search or isearch) will be in the same function: swiper--action.

Cheers!

[abo-abo]

@edkolev Thanks, please check if this change is what you had in mind.

[dieggsy]

@abo-abo at least for evil, isearch-string is only used if evil-search-module is 'isearch, so I think it would require a separate conditional (the current one is for when evil-search-module is evil-search

Although, I'm not super sure how isearch works and what isearch-string is generally for, but especially since it's not an evil-specific thing, would it not make sense to set it regardless of evil?

[edkolev]

@edkolev Thanks, please check if this change is what you had in mind.

@abo-abo I just created a PR which but wraps the new code in a (when (eq evil-search-module 'isearch) ...)

The PR also removes the comment about s-expressions since that means a totally different thing. In this scenario, it's referred to vim's :substitute ex command.