String before prompt

[takaxp]

Hi!

I've attempted to integrate an icon and a separator before the ivy prompt.
I added a new custom variable to control the appearance.

(Setup)

1. User can implement a function that will return a string
2. Set the function to ivy-pre-prompt-function defined as a new custom variable in this PR

(Example code: depends on all-the-icons.el)

(defun my-pre-prompt-function ()
      (if window-system
          (format "%s\n%s "
                  (make-string (frame-width) ?\x5F) ;; "__"
                  (all-the-icons-faicon "sort-amount-asc"))
        (format "%s\n" (make-string (1- (frame-width)) ?\x2D))))
(setq ivy-pre-prompt-function #'my-pre-prompt-function)

(Result)

What do you think?

[abo-abo]

Thanks, merged with minor changes. Please review.

[takaxp]

Verified, thank you for simplifying the code and merge :)

[ambihelical]

This is a very nice addition, thanks @takaxp and @abo-abo . I'm currently binding this to ivy-action-name, so it shows the current action. Along with some ivy-next/prev-action bindings this makes it very ergonomic to select the action.