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;;; transient-navigation.el --- Navigate with a transient mode -*- lexical-binding: t; -*-
;; Copyright (C) 2014 Tom Willemse
;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: convenience
;; Version: 1.0.0
;; 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:
;; Ease navigation by providing a minor mode that enables a transient
;; key map whenever certain navigation commands are specified.
;; The `transient-navigation-mode' and
;; `global-transient-navigation-mode' minor modes can be used to
;; enable this mode either locally or globally.
;; More keybindings can be added to your liking by using the
;; `transnav-make-transient' macro. With this macro You can specify
;; the key to use while the transient keymap is enabled, which map you
;; would like to have activated and which function you would like it
;; to replace and put in the transient keymap.
;; Currently the variables `transient-C-navigation-map' and
;; `transient-M-navigation-map' are provided, which try to extend the
;; Control and Meta (Alt) prefixed navigation commands. You can
;; easily add your own by creating a keymap and passing it as the MAP
;; parameter to `transnav-make-transient'.
;;; Code:
(defgroup transient-navigation nil
"Customization group for the `transient-navigation' package."
:group 'convenience)
(defcustom transient-navigation-cursor-color "#0074D9"
"Color for the cursor when a transient navigation map is enabled.
A value of nil disables changing the color of the cursor when a
transient map is enabled."
:group 'transient-navigation
:type 'color)
(defcustom transient-navigation-cursor-type nil
"The type of cursor to use when a transient map is enabled.
A value of nil disables changing the type of the cursor when a
transient map is enabled."
:group 'transient-navigation)
(defvar transient-navigation-mode-map (make-sparse-keymap)
"The keymap that will start all the trouble.
The original keybindings will be remapped to the ones enabling
the transient keymap.")
(defvar transient-C-navigation-map (make-sparse-keymap)
"The keymap containing control-prefixed keys.")
(defvar transient-M-navigation-map (make-sparse-keymap)
"The keymap containing meta-prefixed keys.")
(defmacro transnav-make-transient (key map func)
"Bind KEY in MAP to FUNC with a transient map."
(let* ((ofuncname (symbol-name func))
(funcname (intern (concat "transient-" ofuncname))))
`(progn
(defun ,funcname (&rest args)
(interactive)
(ignore args)
(call-interactively #',func)
(let ((current-cursor-color (frame-parameter (selected-frame) 'cursor-color))
(current-cursor-type cursor-type))
(when transient-navigation-cursor-color
(set-cursor-color transient-navigation-cursor-color))
(when transient-navigation-cursor-type
(setq cursor-type transient-navigation-cursor-type))
(set-transient-map
,map t (lambda ()
(when transient-navigation-cursor-color
(set-cursor-color current-cursor-color))
(when transient-navigation-cursor-type
(setq cursor-type current-cursor-type))))))
(define-key ,map (kbd ,key) #',func)
(define-key transient-navigation-mode-map
[remap ,func] #',funcname))))
(transnav-make-transient "f" transient-C-navigation-map forward-char)
(transnav-make-transient "b" transient-C-navigation-map backward-char)
(transnav-make-transient "n" transient-C-navigation-map next-line)
(transnav-make-transient "p" transient-C-navigation-map previous-line)
(transnav-make-transient "e" transient-C-navigation-map end-of-line)
(transnav-make-transient "a" transient-C-navigation-map beginning-of-line)
(transnav-make-transient "f" transient-M-navigation-map forward-word)
(transnav-make-transient "b" transient-M-navigation-map backward-word)
(transnav-make-transient "e" transient-M-navigation-map forward-sentence)
(transnav-make-transient "a" transient-M-navigation-map backward-sentence)
;;;###autoload
(define-minor-mode transient-navigation-mode
"Remap certain navigation commands to ones with a transient map."
nil nil transient-navigation-mode-map)
;;;###autoload
(define-globalized-minor-mode global-transient-navigation-mode
transient-navigation-mode transient-navigation-mode)
(provide 'transient-navigation)
;;; transient-navigation.el ends here
|
