;;; oni-evil.el --- Extra Evil mode functions and commands  -*- lexical-binding: t; -*-

;; Copyright (C) 2016  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords:

;; 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 <http://www.gnu.org/licenses/>.

;;; Commentary:

;; Here are some Evil-related commands and functions.

;;; Code:

(require 'evil-states)
(require 'evil-vars)

;;;###autoload
(defun oni:evil-clear-insert-state-keys ()
  "Remove all keybindings from the `evil-insert-state-map'."
  (setcdr evil-insert-state-map nil))

;;;###autoload
(defun oni:maybe-switch-to-normal-state ()
  "Switch the current buffer to normal state.

Only do this when the mode is not in Emacs state by default."
  (unless (memql major-mode (oni:modes-starting-in 'emacs))
    (evil-normal-state)))

;;;###autoload
(defun oni:modes-starting-in (state)
  "Get a list of the modes whose default state is STATE."
  (symbol-value (evil-state-property state :modes)))

;;;###autoload
(defun oni:evil-set-normal-state-key ()
  "Set `C-g' to go back to evil-normal-state, like ESC."
  (let ((evil-modes (delq 'emacs (mapcar #'car evil-state-properties))))
    (dolist (mode evil-modes)
      (let ((keymap-symbol
             (intern (concat "evil-" (symbol-name mode) "-state-map"))))
        (define-key (symbol-value keymap-symbol)
          (kbd "C-g") #'evil-normal-state)))))

;;;###autoload
(defun oni:evil-setup-colemak ()
  "Swap keys to match the Colemak layout."
  (define-key evil-normal-state-map "s" 'evil-delete)
  (define-key evil-normal-state-map "S" 'evil-delete-line)
  (define-key evil-normal-state-map "r" 'evil-substitute)
  (define-key evil-normal-state-map "R" 'evil-change-whole-line)
  (define-key evil-normal-state-map "p" 'evil-replace)
  (define-key evil-normal-state-map "P" 'evil-replace-state)
  (define-key evil-normal-state-map ";" 'evil-paste-after)
  (define-key evil-normal-state-map ":" 'evil-paste-before)
  (define-key evil-normal-state-map "y" 'evil-open-below)
  (define-key evil-normal-state-map "Y" 'evil-open-above)
  (define-key evil-normal-state-map "j" 'evil-yank)
  (define-key evil-normal-state-map "J" 'evil-yank-line)
  (define-key evil-normal-state-map "N" 'evil-join)
  (define-key evil-normal-state-map "u" 'evil-insert)
  (define-key evil-normal-state-map "U" 'evil-insert-line)
  (define-key evil-normal-state-map "l" 'undo)
  (define-key evil-normal-state-map "d" nil)
  (define-key evil-normal-state-map "d&" 'evil-ex-repeat-global-substitute)
  (define-key evil-normal-state-map "d8" 'what-cursor-position)
  (define-key evil-normal-state-map "da" 'what-cursor-position)
  (define-key evil-normal-state-map "di" 'evil-insert-resume)
  (define-key evil-normal-state-map "dJ" 'evil-join-whitespace)
  (define-key evil-normal-state-map "dq" 'evil-fill-and-move)
  (define-key evil-normal-state-map "dw" 'evil-fill)
  (define-key evil-normal-state-map "du" 'evil-downcase)
  (define-key evil-normal-state-map "dU" 'evil-upcase)
  (define-key evil-normal-state-map "df" 'find-file-at-point)
  (define-key evil-normal-state-map "dF" 'evil-find-file-at-point-with-line)
  (define-key evil-normal-state-map "d?" 'evil-rot13)
  (define-key evil-normal-state-map "d~" 'evil-invert-case)
  (define-key evil-normal-state-map "d;" 'goto-last-change)
  (define-key evil-normal-state-map "d," 'goto-last-change-reverse)

  (define-key evil-normal-state-map "i" nil)
  (define-key evil-normal-state-map "I" nil)
  (define-key evil-normal-state-map "o" nil)
  (define-key evil-normal-state-map "O" nil)
  (define-key evil-normal-state-map "g" nil)

  (define-key evil-window-map "g" 'evil-window-top-left)
  (define-key evil-window-map "r" 'evil-window-split)
  (define-key evil-window-map "R" 'evil-window-split)
  (define-key evil-window-map "p" 'evil-window-rotate-downwards)
  (define-key evil-window-map "P" 'evil-window-rotate-upwards)
  (define-key evil-window-map "p" 'evil-window-mru)
  (define-key evil-window-map "y" 'delete-other-windows)
  (define-key evil-window-map "n" 'evil-window-down)
  (define-key evil-window-map "N" 'evil-window-move-very-bottom)
  (define-key evil-window-map "k" 'evil-window-new)
  (define-key evil-window-map "e" 'evil-window-up)
  (define-key evil-window-map "E" 'evil-window-move-very-top)
  (define-key evil-window-map "i" 'evil-window-right)
  (define-key evil-window-map "I" 'evil-window-move-far-right)

  (define-key evil-motion-state-map "f" 'evil-forward-word-end)
  (define-key evil-motion-state-map "F" 'evil-forward-WORD-end)
  (define-key evil-motion-state-map "t" 'evil-find-char)
  (define-key evil-motion-state-map "T" 'evil-find-char-backward)
  (define-key evil-motion-state-map "g" 'evil-find-char-to)
  (define-key evil-motion-state-map "G" 'evil-find-char-to-backward)
  (define-key evil-motion-state-map "D" 'evil-goto-line)
  (define-key evil-motion-state-map "o" 'evil-repeat-find-char)
  (define-key evil-motion-state-map "O" 'evil-ex)
  (define-key evil-motion-state-map "j" 'evil-yank)
  (define-key evil-motion-state-map "J" 'evil-yank-line)
  (define-key evil-motion-state-map "n" 'evil-next-line)
  (define-key evil-motion-state-map "k" 'evil-search-next)
  (define-key evil-motion-state-map "K" 'evil-search-previous)
  (define-key evil-motion-state-map "e" 'evil-previous-line)
  (define-key evil-motion-state-map "E" 'evil-lookup)
  (define-key evil-motion-state-map "i" 'evil-forward-char)
  (define-key evil-motion-state-map "I" 'evil-window-bottom)
  (define-key evil-motion-state-map "d" nil)
  (define-key evil-motion-state-map "dd" 'evil-goto-definition)
  (define-key evil-motion-state-map "de" 'evil-backward-word-end)
  (define-key evil-motion-state-map "dE" 'evil-backward-WORD-end)
  (define-key evil-motion-state-map "dg" 'evil-goto-first-line)
  (define-key evil-motion-state-map "dj" 'evil-next-visual-line)
  (define-key evil-motion-state-map "dk" 'evil-previous-visual-line)
  (define-key evil-motion-state-map "d0" 'evil-beginning-of-visual-line)
  (define-key evil-motion-state-map "d_" 'evil-last-non-blank)
  (define-key evil-motion-state-map "d^" 'evil-first-non-blank-of-visual-line)
  (define-key evil-motion-state-map "dm" 'evil-middle-of-visual-line)
  (define-key evil-motion-state-map "d$" 'evil-end-of-visual-line)
  (define-key evil-motion-state-map "d\C-]" 'find-tag)

  (define-key evil-visual-state-map "P" 'evil-change)
  (define-key evil-visual-state-map "y" 'exchange-point-and-mark)
  (define-key evil-visual-state-map "Y" 'evil-visual-exchange-corners)
  (define-key evil-visual-state-map "U" 'evil-insert)
  (define-key evil-visual-state-map "u" evil-inner-text-objects-map)
  (define-key evil-visual-state-map "l" 'evil-downcase)
  (define-key evil-visual-state-map "L" 'evil-upcase))

(provide 'oni-evil)
;;; oni-evil.el ends here