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;;; +key.el --- minor mode for keymaps -*- lexical-binding: t; -*-
;;; Commentary:
;; Much of the code here was cribbed from https://emacs.stackexchange.com/a/358,
;; which in turn was cribbed in part from
;; https://github.com/kaushalmodi/.emacs.d/blob/master/elisp/modi-mode.el,
;; https://github.com/jwiegley/use-package/blob/master/bind-key.el and
;; elsewhere.
;; The basic idea is to have a minor-mode for my personal key customizations,
;; especially a "leader key" set up à la vim. In Emacs, I use `C-z' for this
;; leader key, because of its easy location and relative uselessness by default.
;;; Code:
;; I need to define this map before the proper mode map.
(defvar +key-leader-map (let ((map (make-sparse-keymap))
(c-z (global-key-binding "\C-z")))
(define-key map "\C-z" c-z)
map)
"A leader keymap under the \"C-z\" bind.")
(defvar +key-mode-map (let ((map (make-sparse-keymap)))
(define-key map "\C-z" +key-leader-map)
map)
"Keymap for `+key-mode'.")
;;;###autoload
(define-minor-mode +key-mode
"A minor mode with keybindings that will override every other mode."
:init-value t
:lighter " +"
:keymap +key-mode-map)
;;;###autoload
(define-globalized-minor-mode +key-global-mode +key-mode +key-mode)
(add-to-list 'emulation-mode-map-alists `((+key-mode . ,+key-mode-map)))
(defun turn-off-+key-mode ()
"Turn off `+key-mode'."
(+key-mode -1))
(add-hook 'minibuffer-setup-hook 'turn-off-+key-mode)
;; Extras for `setup'
(with-eval-after-load 'setup
(setup-define :+key
(lambda (key command)
`(define-key +key-mode-map ,key ,command))
:documentation "Bind KEY to COMMAND in `+key-mode-map'."
:debug '(form sexp)
:ensure '(kbd func)
:repeatable t)
(setup-define :+leader
(lambda (key command)
`(define-key +key-leader-map ,key ,command))
:documentation "Bind KEY to COMMAND in `+key-leader-map'."
:debug '(form sexp)
:ensure '(kbd func)
:repeatable t))
(provide '+key)
;;; +key.el ends here
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