250 lines
10 KiB
EmacsLisp
250 lines
10 KiB
EmacsLisp
;;; core-evilified-state.el --- A minimalistic evil state
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;; Copyright (C) 2014, 2015 syl20bnr
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;;
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; Keywords: convenience editing evil spacemacs
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;; Created: 22 Mar 2015
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;; Version: 1.0
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;; Package-Requires: ((evil "1.0.9") (evil-leader "0.4.3"))
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;; This file is not part of GNU Emacs.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Define a `evilified' evil state inheriting from `emacs' state and
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;; setting a minimalist list of Vim key bindings (like navigation, search, ...)
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;;; Code:
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(require 'core-dotspacemacs)
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(require 'evil)
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(require 'evil-leader)
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(defvar spacemacs-core-evilified-state--modes nil
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"List of all evilified modes.")
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(defvar spacemacs-core-evilified-state--visual-state-map evil-visual-state-map
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"Evil visual state map backup.")
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(defvar spacemacs-core-evilified-state--evil-surround nil
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"Evil surround mode variable backup.")
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(make-variable-buffer-local 'spacemacs-core-evilified-state--evil-surround)
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(evil-define-state evilified
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"Evilified state.
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Hybrid `emacs state' with carrefully selected Vim key bindings.
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See spacemacs conventions for more info."
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:tag " <Ev> "
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:enable (emacs)
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:message "-- EVILIFIED BUFFER --"
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:cursor box)
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(add-hook 'evil-evilified-state-entry-hook 'spacemacs//evilified-state-on-entry)
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(add-hook 'evil-evilified-state-exit-hook 'spacemacs//evilified-state-on-exit)
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(add-hook 'evil-visual-state-entry-hook 'spacemacs//visual-state-on-entry)
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(add-hook 'evil-visual-state-exit-hook 'spacemacs//visual-state-on-exit)
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(defun spacemacs//evilify-pre-command-hook ()
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(let ((map (get-char-property (point) 'keymap)))
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(when (and map (assq 'evilified-state map))
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(let* ((submap (cdr (assq 'evilified-state map)))
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(command (when (and submap (eq 1 (length (this-command-keys))))
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(lookup-key submap (this-command-keys)))))
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(when command
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(setq this-command command))))))
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(defun spacemacs//evilified-state-on-entry ()
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"Setup evilified state."
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(add-hook 'pre-command-hook 'spacemacs//evilify-pre-command-hook nil 'local)
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(when (bound-and-true-p evil-surround-mode)
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(make-local-variable 'evil-surround-mode)
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(evil-surround-mode -1))
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(setq-local evil-normal-state-map (cons 'keymap nil))
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(setq-local evil-visual-state-map (cons 'keymap (list (cons ?y 'evil-yank)))))
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(defun spacemacs//evilified-state-on-exit ()
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"Clean evilified state"
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(remove-hook 'pre-command-hook 'spacemacs//evilify-pre-command-hook 'local))
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(defun spacemacs//visual-state-on-entry ()
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"Setup visual state."
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(add-hook 'pre-command-hook 'spacemacs//evilify-pre-command-hook nil 'local))
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(defun spacemacs//visual-state-on-exit ()
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"Clean visual state"
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(remove-hook 'pre-command-hook 'spacemacs//evilify-pre-command-hook 'local))
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;; default key bindings for all evilified buffers
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(define-key evil-evilified-state-map (kbd dotspacemacs-leader-key)
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evil-leader--default-map)
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(define-key evil-evilified-state-map "/" 'evil-search-forward)
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(define-key evil-evilified-state-map ":" 'evil-ex)
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(define-key evil-evilified-state-map "h" 'evil-backward-char)
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(define-key evil-evilified-state-map "j" 'evil-next-visual-line)
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(define-key evil-evilified-state-map "k" 'evil-previous-visual-line)
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(define-key evil-evilified-state-map "l" 'evil-forward-char)
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(define-key evil-evilified-state-map "n" 'evil-search-next)
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(define-key evil-evilified-state-map "N" 'evil-search-previous)
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(define-key evil-evilified-state-map "v" 'evil-visual-char)
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(define-key evil-evilified-state-map "V" 'evil-visual-line)
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(define-key evil-evilified-state-map "gg" 'evil-goto-first-line)
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(define-key evil-evilified-state-map "G" 'evil-goto-line)
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(define-key evil-evilified-state-map (kbd "C-f") 'evil-scroll-page-down)
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(define-key evil-evilified-state-map (kbd "C-b") 'evil-scroll-page-up)
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(define-key evil-evilified-state-map (kbd "C-d") 'evil-scroll-down)
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(define-key evil-evilified-state-map (kbd "C-u") 'evil-scroll-up)
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(define-key evil-evilified-state-map (kbd "C-z") 'evil-emacs-state)
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;; old macro
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(defmacro evilify (mode map &rest body)
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"Set `evilified state' as default for MODE.
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BODY is a list of additional key bindings to apply for the given MAP in
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`evilified state'."
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(let ((defkey (when body `(evil-define-key 'evilified ,map ,@body))))
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`(progn (unless ,(null mode)
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(unless (memq ',mode spacemacs-core-evilified-state--modes)
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(push ',mode spacemacs-core-evilified-state--modes))
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(unless (or (bound-and-true-p holy-mode)
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(memq ',mode evil-evilified-state-modes))
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(delq ',mode evil-emacs-state-modes)
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(push ',mode evil-evilified-state-modes)))
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(unless ,(null defkey) (,@defkey)))))
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;; new macro
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(defmacro spacemacs|evilify-map (map &rest props)
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"Evilify MAP.
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Avaiblabe PROPS:
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`:mode SYMBOL'
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A mode SYMBOL associated with MAP. Used to add SYMBOL to the list of modes
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defaulting to `evilified-state'.
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`:evilified-map SYMBOL'
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A map SYMBOL of an alternate evilified map, if nil then
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`evil-evilified-state-map' is used.
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`:eval-after-load SYMBOL'
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If specified the evilification of MAP is deferred to the loading of the feature
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bound to SYMBOL. May be required for some lazy-loaded maps.
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`:bindings EXPRESSIONS'
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One or several EXPRESSIONS with the form `KEY FUNCTION':
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KEY1 FUNCTION1
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KEY2 FUNCTION2
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...
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Each pair KEYn FUNCTIONn is defined in MAP after the evilification of it."
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(declare (indent 1))
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(let* ((mode (plist-get props :mode))
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(evilified-map (plist-get props :evilified-map))
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(eval-after-load (plist-get props :eval-after-load))
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(bindings (spacemacs/mplist-get props :bindings))
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(defkey (when bindings `(evil-define-key 'evilified ,map ,@bindings)))
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(body
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`(progn
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(let ((sorted-map (spacemacs//evilify-sort-keymap
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(or ,evilified-map evil-evilified-state-map)))
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processed)
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(mapc (lambda (map-entry)
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(unless (member (car map-entry) processed)
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(setq processed (spacemacs//evilify-event
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,map ',map
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(or ,evilified-map
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evil-evilified-state-map)
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(car map-entry) (cdr map-entry)))))
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sorted-map))
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(unless ,(null defkey)
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(,@defkey))
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(unless ,(null mode)
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(spacemacs/evilify-configure-default-state ',mode)))))
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(if (null eval-after-load)
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`(,@body)
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`(eval-after-load ',eval-after-load '(,@body)))))
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(defun spacemacs/evilify-configure-default-state (mode)
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"Configure default state for the passed mode."
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(add-to-list 'spacemacs-core-evilified-state--modes mode)
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(unless (bound-and-true-p holy-mode)
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(delq mode evil-emacs-state-modes)
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(add-to-list 'evil-evilified-state-modes mode)))
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(defun spacemacs//evilify-event (map map-symbol evil-map event evil-value
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&optional processed pending-funcs)
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"Evilify EVENT in MAP and return a list of PROCESSED events."
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(if (and event (or evil-value pending-funcs))
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(let* ((kbd-event (kbd (single-key-description event)))
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(map-value (lookup-key map kbd-event))
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(evil-value (or evil-value
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(lookup-key evil-map kbd-event)
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(car (pop pending-funcs)))))
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(when evil-value
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(evil-define-key 'evilified map kbd-event evil-value))
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(when map-value
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(add-to-list 'pending-funcs (cons map-value event) 'append))
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(push event processed)
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(setq processed (spacemacs//evilify-event
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map map-symbol evil-map
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(spacemacs//evilify-find-new-event event) nil
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processed pending-funcs)))
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(when pending-funcs
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(spacemacs-buffer/warning
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(concat (format (concat "Auto-evilication could not remap these "
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"functions in map `%s':\n")
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map-symbol)
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(mapconcat (lambda (x)
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(format " - `%s' originally mapped on `%s'"
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(car x) (single-key-description (cdr x))))
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pending-funcs "\n")))))
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processed)
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(defun spacemacs//evilify-find-new-event (event)
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"Return a new event for the evilified EVENT."
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(when event
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(cond
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;; space
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((equal event 32) nil)
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((equal event ?/) nil)
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((equal event ?:) nil)
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;; C-g (cannot remap C-g)
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((equal event ?\a) nil)
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((and (<= ?a event) (<= event ?z)) (- event 32))
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;; don't shadow C-g, G is mapped directly to C-S-g
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((equal event ?G) (+ (expt 2 25) ?\a))
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((and (<= ?A event) (<= event ?Z)) (- event 64))
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((and (<= 1 event) (<= event 26)) (+ (expt 2 25) event)))))
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(defun spacemacs//evilify-sort-keymap (map)
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"Sort MAP following the order: `s' > `S' > `C-s' > `C-S-s'"
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(let (list)
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(map-keymap (lambda (a b) (push (cons a b) list)) map)
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(sort list
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(lambda (a b)
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(setq a (car a) b (car b))
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(if (integerp a)
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(if (integerp b)
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(if (and (< a 256) (< b 256))
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(> a b)
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(< a b))
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t)
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(if (integerp b) nil
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(string< a b)))))))
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(provide 'core-evilified-state)
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;;; core-evilified-state.el ends here
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