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;; I often find myself simply jumping around the code to read it. |
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;; However, it's a bit daunting to keep the Ctrl pressed. |
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;; I don't like vim but I'd like some simple one button navigation |
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;; |
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;; For a while, I used god-mode for that but its purpose is quite different |
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;; which sometimes caused some weird behaviour when I had it enabled. |
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;; Plus, some shortcuts simply aren't improved by this (e.g. C-M-f). |
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;; So I decided to write my own minor mode specifically for navigation *I* |
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;; need. |
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;; |
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;; I don't imagine this is 100% ergonomic and complete but I think people may |
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;; find it useful if they want to write their own simple mode. |
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(defvar my/navigation-mode nil) |
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(add-to-list 'minor-mode-alist '(my/navigation-mode " my/Nav")) |
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(deftheme my/navigation-mode/theme "Indicates that my/navigation-mode is on") |
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(custom-theme-set-faces 'my/navigation-mode/theme |
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'(cursor ((t (:background "#ff0000"))))) |
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(defvar my/navigation-mode/keymap |
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`(keymap |
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(t . ,#'my/navigation-mode/fallback-key-handler))) |
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(keymap-set my/navigation-mode/keymap "e" #'move-end-of-line) |
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(keymap-set my/navigation-mode/keymap "M-e" #'sp-end-of-sexp) |
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(keymap-set my/navigation-mode/keymap "a" #'move-beginning-of-line) |
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(keymap-set my/navigation-mode/keymap "M-a" #'sp-beginning-of-sexp) |
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;; Originally, I wanted to use WASD for navigation but I noticed that |
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;; it's hard to break my muscle memory so I went back to FBPNAE |
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(keymap-set my/navigation-mode/keymap "b" #'backward-char) |
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(keymap-set my/navigation-mode/keymap "C-b" #'backward-word) |
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(keymap-set my/navigation-mode/keymap "M-b" #'backward-sexp) |
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(keymap-set my/navigation-mode/keymap "f" #'forward-char) |
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(keymap-set my/navigation-mode/keymap "C-f" #'forward-word) |
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(keymap-set my/navigation-mode/keymap "M-f" #'forward-sexp) |
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(keymap-set my/navigation-mode/keymap "p" #'previous-line) |
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(keymap-set my/navigation-mode/keymap "M-p" #'scroll-down-command) |
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(keymap-set my/navigation-mode/keymap "n" #'next-line) |
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(keymap-set my/navigation-mode/keymap "M-n" #'scroll-up-command) |
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(keymap-set my/navigation-mode/keymap "v" #'scroll-up-command) |
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(keymap-set my/navigation-mode/keymap "M-v" #'scroll-down-command) |
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(keymap-set my/navigation-mode/keymap "SPC" #'my/navigation-mode) |
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(keymap-set my/navigation-mode/keymap "<escape>" #'my/navigation-mode) |
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(defun my/navigation-mode/fallback-key-handler () |
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(interactive) |
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(beep) |
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(message "[my/navigation-mode] key not recognised. To disable the mode, press SPC")) |
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(defun my/navigation-mode (&optional arg) |
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(interactive '(toggle)) |
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(setf my/navigation-mode (if (eql arg 'toggle) |
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(not my/navigation-mode) |
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(> arg 0))) |
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;; The keymap is being added and removed every time the mode is toggled on/off |
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;; This is to make sure it stays at the head of the alist and takes precedence over |
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;; other modes (e.g. magit took precedence over god mode in my config) |
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(if my/navigation-mode |
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(progn |
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(add-to-list 'minor-mode-map-alist (cons 'my/navigation-mode my/navigation-mode/keymap)) |
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(enable-theme 'my/navigation-mode/theme) |
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(message "my/navigation-mode on")) |
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(progn |
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(setq minor-mode-map-alist |
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(seq-filter (lambda (x) (not (eql (car x) 'my/navigation-mode))) |
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minor-mode-map-alist)) |
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(disable-theme 'my/navigation-mode/theme) |
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(message "my/navigation-mode off")))) |
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(global-set-key (kbd "<escape>") #'my/navigation-mode) |
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