;;; jao-embark-prompter.el --- a prompter for embark  -*- lexical-binding: t; -*-

;; Copyright (C) 2021  jao

;; Author: jao <mail@jao.io>
;; Keywords: convenience

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Custom action prompting

;;; Code:

(defun jao-embark--show-keymap (keymap)
  (with-current-buffer (cvs-get-buffer-create "*Embark Actions*")
    (read-only-mode -1)
    (setq-local cursor-type nil)
    (delete-region (point-min) (point-max))
    (seq-each (lambda (x)
                (let ((k (car x)) (c (cdr x)))
                  (unless (embark--omit-binding-p c)
                    (let ((desc (if (numberp k)
                                    (single-key-description k)
                                  (key-description k)))
                          (doc (car (split-string
                                     (or (ignore-errors (documentation c)) "")
                                     "\n"))))
                      (insert (format "%s  %s (%s)\n"
                                      (propertize desc 'face 'embark-keybinding)
                                      (propertize doc 'face 'italic)
                                      (symbol-name c)))))))
              (cdr (keymap-canonicalize keymap)))
    (delete-char -1)
    (read-only-mode 1)
    (pop-to-buffer (current-buffer) nil t)
    (fit-window-to-buffer)))

(defun jao-embark--prompter (keymap)
  (let* ((buf (jao-embark--show-keymap keymap))
         (cmd (embark-keymap-prompter keymap)))
    (embark-kill-buffer-and-window buf)
    cmd))

(advice-add 'embark-completing-read-prompter :override #'jao-embark--prompter)

(add-to-list 'display-buffer-alist
             '("\\`\\*Embark Actions*\\*"
               (display-buffer-at-bottom)
               ;; (window-parameters (mode-line-format . none))
               (window-height . fit-window-to-buffer)))

(provide 'jao-embark-prompter)
;;; jao-embark-prompter.el ends here