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;;; acdw.el -*- lexical-binding: t; coding: utf-8-unix -*-
;; Author: Case Duckworth <acdw@acdw.net>
;; Created: Sometime during Covid-19, 2020
;; Keywords: configuration
;; URL: https://tildegit.org/acdw/emacs
;; This file is NOT part of GNU Emacs.
;;; License:
;; Everyone is permitted to do whatever with this software, without
;; limitation. This software comes without any warranty whatsoever,
;; but with two pieces of advice:
;; - Don't hurt yourself.
;; - Make good choices.
;;; Commentary:
;; `acdw.el' contains `acdw/map', its mode, and assorted ease-of-life
;; functions for me, acdw.
;;; Code:
;; Utility constants
(defconst acdw/system (pcase system-type
('gnu/linux :home)
((or 'msdos 'windows-nt) :work)
(_ :other))
"Which computer system is currently being used.")
;; Utility functions
(defmacro when-unfocused (name &rest forms)
"Define a function NAME, executing FORMS, that fires when Emacs
is unfocused."
(declare (indent 1))
(let ((func-name (intern (concat "when-unfocused-" (symbol-name name)))))
`(progn
(defun ,func-name () "Defined by `when-unfocused'."
(when (seq-every-p #'null
(mapcar #'frame-focus-state (frame-list)))
,@forms))
(add-function :after after-focus-change-function #',func-name))))
(defmacro hook-defun (name hooks &rest forms)
"Define a function NAME that executes FORMS, and add it to
each hook in HOOKS."
(declare (indent 2))
(let ((func-name (intern (concat "hook-defun-" (symbol-name name))))
(hook-list (if (consp hooks) hooks (list hooks)))
(hook-defun-add-hook-list))
`(progn
(defun ,func-name () "Defined by `hook-defun'." ,@forms)
,@(dolist (hook hook-list hook-defun-add-hook-list)
(push `(add-hook ',hook #',func-name) hook-defun-add-hook-list)))))
(defun refresh-emacs ()
"Reload Emacs's configuration files."
(interactive)
(dolist (file (append
;; Load lisp libraries first, in case their functionality is
;; used by {early-,}init.el
(let* ((dir (expand-file-name "lisp/" user-emacs-directory))
(full-name (lambda (f)
(concat (file-name-as-directory dir) f))))
(mapcar full-name (directory-files dir nil "\\.el\\'")))
;; Load regular init files
(list (locate-user-emacs-file "early-init.el")
(locate-user-emacs-file "init.el" ".emacs"))))
(with-message (format "Loading %s" file)
(when (file-exists-p file)
(load-file file)))))
(defun expand-file-name-exists-p (&rest expand-file-name-args)
"Call `expand-file-name' on EXPAND-FILE-NAME-ARGS, returning
its name if it exists, or NIL otherwise."
(let ((file (apply #'expand-file-name expand-file-name-args)))
(if (file-exists-p file)
file
nil)))
(defmacro with-message (message &rest body)
"Execute BODY, messaging 'MESSAGE...' before and 'MESSAGE... Done.' after."
(declare (indent 1))
;; Wrap a progn inside a prog1 to return the return value of the body.
`(prog1
(progn (message "%s..." ,message)
,@body)
(message "%s... Done." ,message)))
(defun acdw/dir (&optional file make-directory)
"Place Emacs files in one place.
If called without parameters, `acdw/dir' expands to
~/.emacs.d/var or similar. If called with FILE, `acdw/dir'
expands FILE to ~/.emacs.d/var, optionally making its directory
if MAKE-DIRECTORY is non-nil."
(let ((dir (expand-file-name (convert-standard-filename "var/")
user-emacs-directory)))
(if file
(let ((file-name (expand-file-name (convert-standard-filename file)
dir)))
(when make-directory
(make-directory (file-name-directory file-name) 'parents))
file-name)
dir)))
(defun acdw/gc-enable ()
"Enable the Garbage collector."
(setq gc-cons-threshold (* 800 1024 1024)
gc-cons-percentage 0.1))
(defun acdw/gc-disable ()
"Functionally disable the Garbage collector."
(setq gc-cons-threshold most-positive-fixnum
gc-cons-percentage 0.8))
(defun acdw/sunrise-sunset (sunrise-command sunset-command)
"Run commands at sunrise and sunset."
(let* ((times-regex (rx (* nonl)
(: (any ?s ?S) "unrise") " "
(group (repeat 1 2 digit) ":"
(repeat 1 2 digit)
(: (any ?a ?A ?p ?P) (any ?m ?M)))
(* nonl)
(: (any ?s ?S) "unset") " "
(group (repeat 1 2 digit) ":"
(repeat 1 2 digit)
(: (any ?a ?A ?p ?P) (any ?m ?M)))
(* nonl)))
(ss (sunrise-sunset))
(_m (string-match times-regex ss))
(sunrise-time (match-string 1 ss))
(sunset-time (match-string 2 ss)))
(run-at-time sunrise-time (* 60 60 24) sunrise-command)
(run-at-time sunset-time (* 60 60 24) sunset-command)
(run-at-time "12:00am" (* 60 60 24) sunset-command)))
(defun acdw/find-emacs-dotfiles ()
"Finds lisp files in `user-emacs-directory' and passes them to
`completing-read'."
(interactive)
(find-file (completing-read ".emacs: "
(directory-files-recursively
user-emacs-directory "\.el$"))))
(defun acdw/kill-a-buffer (&optional prefix)
"Kill a buffer based on the following rules:
C-x k => Kill CURRENT buffer and window
C-u C-x k => Kill OTHER buffer and window
C-u C-u C-x k => Kill ALL OTHER buffers and windows
Prompt only if there are unsaved changes."
(interactive "P")
(pcase (or (car prefix) 0)
(0 (kill-current-buffer)
(unless (one-window-p) (delete-window)))
(4 (other-window 1)
(kill-current-buffer)
(unless (one-window-p) (delete-window)))
(16 (mapc 'kill-buffer (delq (current-buffer) (buffer-list)))
(delete-other-windows))))
;; Make `C-z' more useful
(defvar acdw/leader
(let ((map (make-sparse-keymap))
(c-z (global-key-binding "\C-z")))
(global-set-key "\C-z" map)
(define-key map "\C-z" c-z)
map))
;; `acdw/reading-mode'
(define-minor-mode acdw/reading-mode
"A mode for reading."
:init-value nil
:lighter " Read"
(if acdw/reading-mode
(progn ;; turn on
;; settings
(setq-local mode-line-format
'(:eval
(let* ((fmt " Reading %b")
(len (length (format-mode-line fmt))))
(concat
(propertize " "
'display `((space :align-to (- right
,len)))
'face '(:inherit italic))
fmt)))
orig-indicate-empty-lines indicate-empty-lines
indicate-empty-lines nil
orig-indicate-buffer-boundaries indicate-buffer-boundaries
indicate-buffer-boundaries nil)
;; disable modes
(dolist (mode '(display-fill-column-indicator-mode))
(when (fboundp mode)
(funcall mode -1)))
;; enable modes
(dolist (mode '(iscroll-mode olivetti-mode))
(when (fboundp mode)
(funcall mode +1))))
;; turn off
;; settings
(setq-local indicate-empty-lines orig-indicate-empty-lines
indicate-buffer-boundaries orig-indicate-buffer-boundaries)
(kill-local-variable 'mode-line-format)
;; enable modes
(dolist (mode '(display-fill-column-indicator-mode))
(when (fboundp mode)
(funcall mode +1)))
;; disable modes
(dolist (mode '(olivetti-mode iscroll-mode))
(when (fboundp mode)
(funcall mode -1)))))
(provide 'acdw)
;;; acdw.el ends here
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