dotfiles/.emacs.d/org/evil.org

* Evil
#+NAME: evil
#+BEGIN_SRC emacs-lisp :tangle yes
  (use-package evil
    :ensure t
    :init
    (setq evil-want-keybinding nil) 
    :bind (:map evil-motion-state-map
		("h" . nil)
		("j" . evil-backward-char)
		("k" . evil-previous-line)
		("l" . evil-next-line)
		(";" . evil-forward-char)
		:map evil-motion-state-map
		("<left>" . (lambda () (interactive) ()))
		("<right>" . (lambda () (interactive) ()))
		("<up>" . (lambda ()  (interactive) ()))
		("<down>" . (lambda () (interactive) ()))
		:map evil-insert-state-map
		("<left>" . (lambda () (interactive) ()))
		("<right>" . (lambda () (interactive) ()))
		("<up>" . (lambda ()  (interactive) ()))
		("<down>" . (lambda () (interactive) ())))
    :config
    (evil-mode 1)
    (with-eval-after-load "treemacs"
      (evil-define-key 'treemacs treemacs-mode-map (kbd "h") nil)
      (evil-define-key 'treemacs treemacs-mode-map (kbd "j") 'treemacs-root-up)
      (evil-define-key 'treemacs treemacs-mode-map (kbd "k") 'treemacs-previous-line)
      (evil-define-key 'treemacs treemacs-mode-map (kbd "l") 'treemacs-next-line)
      (evil-define-key 'treemacs treemacs-mode-map (kbd ";") 'treemacs-root-down))
    ;; :q should kill the current buffer rather than quitting emacs entirely
    (evil-ex-define-cmd "q" 'kill-this-buffer)
    ;; Need to type out :quit to close emacs
    (evil-ex-define-cmd "quit" 'evil-quit)
    ;; save and close buffer
    (defun liu233w/ex-save-kill-buffer-and-close ()
      (interactive)
      (save-buffer)
      (kill-this-buffer))
    (evil-ex-define-cmd "wq" 'liu233w/ex-save-kill-buffer-and-close))

  (use-package evil-collection
    :ensure t
    :config
    (evil-collection-init 'vterm)
    (defun evil-collection-vterm-escape-stay ()
      "Go back to normal state but don't move cursor backwards.
      Moving cursor backwards is the default vim behavior but
      it is not appropriate in some cases like terminals."
      (setq-local evil-move-cursor-back nil))

    (add-hook 'vterm-mode-hook #'evil-collection-vterm-escape-stay))

  (use-package evil-surround
    :ensure t
    :after evil
    :config
    (global-evil-surround-mode 1))

  (use-package key-chord
    :ensure t
    :config
    (defun magic_rb/key-chord-define-nonsymmetric (keymap keys command)
      (if (/= 2 (length keys))
	  (error "Key-chord keys must have two elements"))
      (let ((key1 (logand 255 (aref keys 0)))
	    (key2 (logand 255 (aref keys 1))))
	(if (eq key1 key2)
	    (define-key keymap (vector 'key-chord key1 key2) command)
	  (define-key keymap (vector 'key-chord key1 key2) command)
	  )))
    (setq key-chord-two-keys-delay 0.15)
    (key-chord-define evil-insert-state-map "jj" 'evil-normal-state)
    (key-chord-mode 1))
#+END_SRC