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;;; acdw.el --- various meta-whatevers -*- lexical-binding: t -*-
;;; Commentary:
;; What's that saying about how the hardest things in computer science
;; are naming and off-by-one errors? Well, the naming one I know very
;; well. I've been trying to figure out a good way to prefix my
;; bespoke functions, other stuff I found online, and various emacs
;; lisp detritus for quite some time (I reckon at over a year, as of
;; 2021-11-02). Finally, I found the answer in the writings of Daniel
;; Mendler: I'll prefix everything with a `+' !
;; To that end, pretty much everything in lisp/ will have a filename
;; like "+org.el", except of course this file, and maybe a few
;; /actually original/ libraries I haven't had the wherewithal to
;; package out properly yet.
;; Is it perfect? No. Is it fine? Yes. Here it is.
;;; Code:
(require 'diary-lib)
(require 'solar) ; for +sunrise-sunset
;;; Define a directory and an expanding function
(defmacro +define-dir (name directory &optional docstring inhibit-mkdir)
"Define a variable and function NAME expanding to DIRECTORY.
DOCSTRING is applied to the variable. Ensure DIRECTORY exists in
the filesystem, unless INHIBIT-MKDIR is non-nil."
(declare (indent 2))
(unless inhibit-mkdir
(make-directory (eval directory) :parents))
`(progn
(defvar ,name ,directory
,(concat docstring (when docstring "\n")
"Defined by `/define-dir'."))
(defun ,name (file &optional mkdir)
,(concat "Expand FILE relative to variable `" (symbol-name name) "'.\n"
"If MKDIR is non-nil, the directory is created.\n"
"Defined by `/define-dir'.")
(let ((file-name (expand-file-name (convert-standard-filename file)
,name)))
(when mkdir
(make-directory (file-name-directory file-name) :parents))
file-name))))
(defun +suppress-messages (oldfn &rest args) ; from pkal
"Advice wrapper for suppressing `message'.
OLDFN is the wrapped function, that is passed the arguments
ARGS."
(let ((msg (current-message)))
(prog1
(let ((inhibit-message t))
(apply oldfn args))
(when msg
(message "%s" msg)))))
(defun +ensure-after-init (function)
"Ensure FUNCTION runs after init, or now if already initialized.
If Emacs is already started, run FUNCTION. Otherwise, add it to
`after-init-hook'. FUNCTION is called with no arguments."
(if after-init-time
(funcall function)
(add-hook 'after-init-hook function)))
(defmacro +with-ensure-after-init (&rest body)
"Ensure BODY forms run after init.
Convenience macro wrapper around `+ensure-after-init'."
(declare (indent 0) (debug (def-body)))
`(+ensure-after-init (lambda () ,@body)))
(defun +remember-prefix-arg (p-arg P-arg)
"Display prefix ARG, in \"p\" and \"P\" `interactive' types.
I keep forgetting how they differ."
(interactive "p\nP")
(message "p: %S P: %S" p-arg P-arg))
(defmacro +defvar (var value &rest _)
"Quick way to `setq' a variable from a `defvar' form."
(declare (doc-string 3) (indent 2))
`(setq ,var ,value))
(defmacro +with-message (message &rest body)
"Execute BODY, with MESSAGE.
If body executes without errors, MESSAGE...Done will be displayed."
(declare (indent 1))
(let ((msg (gensym)))
`(let ((,msg ,message))
(unwind-protect (progn (message "%s..." ,msg)
,@body)
(message "%s...done" ,msg)))))
(defun +mapc-some-buffers (func &optional predicate)
"Perform FUNC on all buffers satisfied by PREDICATE.
By default, act on all buffers.
PREDICATE is a function called with one argument, the current
buffer. FUNC is called with no arguments. Both are called
within a `with-current-buffer' form."
(let ((pred (or predicate t)))
(dolist (buf (buffer-list))
(with-current-buffer buf
(when (if (or (eq (car-safe pred) 'closure)
(fboundp pred))
(funcall pred buf)
pred)
(funcall func))))))
;; https://github.com/cstby/emacs.d/blob/main/init.el#L67
(defun +clean-empty-lines (&optional begin end)
"Remove duplicate empty lines from BEGIN to END.
Called interactively, this function acts on the region, if
active, or else the entire buffer."
(interactive "*r")
(unless (region-active-p)
(setq begin (point-min)
end (save-excursion
(goto-char (point-max))
(skip-chars-backward "\n[:space:]")
(point))))
(save-excursion
(save-restriction
(narrow-to-region begin end)
(goto-char (point-min))
(while (re-search-forward "\n\n\n+" nil :move)
(replace-match "\n\n"))
;; Insert a newline at the end.
(goto-char (point-max))
(unless (or (buffer-narrowed-p)
(= (line-beginning-position) (line-end-position)))
(insert "\n")))))
(defun +open-paragraph ()
"Open a paragraph after paragraph at point.
A paragraph is defined as continguous non-empty lines of text
surrounded by empty lines, so opening a paragraph means to make
three blank lines, then place the point on the second one."
(interactive "*")
(unless (derived-mode-p 'special-mode 'lui-mode 'comint-mode)
;; Go to next blank line. This /isn't/ `end-of-paragraph-text' because
;; that's weird with org, and I'm guessing other modes too.
(while (and (not (looking-at "^$"))
(< (point) (point-max)))
(forward-line 1))
(newline)
(delete-blank-lines)
(newline 2)
(previous-line)))
(defun +split-window-then (&optional where arg)
"Split the window into a new buffer.
With non-nil ARG (\\[universal-argument] interactively), don't
prompt for a buffer to switch to. This function will split the
window using `split-window-sensibly', or open the new window in
the direction specified by WHERE. WHERE is ignored when called
interactively; if you want specific splitting, use
`+split-window-right-then' or `+split-window-below-then'."
(interactive "i\nP")
;; TODO: Canceling at the switching phase leaves the point in the other
;; window. Ideally, the user would see this as one action, meaning a cancel
;; would return to the original window.
(pcase where
;; These directions are 'backward' to the OG Emacs split-window commands,
;; because by default Emacs leaves the cursor in the original window. Most
;; users probably expect a switch to the new window, at least I do.
((or 'right :right) (split-window-right) (other-window 1))
((or 'left :left) (split-window-right))
((or 'below :below) (split-window-below) (other-window 1))
((or 'above :above) (split-window-below))
((pred null)
(or (split-window-sensibly)
(if (< (window-height) (window-width))
(split-window-below)
(split-window-right)))
(other-window 1))
(_ (user-error "Unknown WHERE paramater: %s" where)))
(unless arg
(condition-case nil
(call-interactively
(pcase (read-char "(B)uffer or (F)ile?")
(?b (if (fboundp #'consult-buffer)
#'consult-buffer
#'switch-to-buffer))
(?f #'find-file)
(_ #'ignore)))
(quit (delete-window)))))
(defun +split-window-right-then (&optional arg)
"Split window right, then prompt for a new buffer.
With optional ARG (\\[universal-argument]), just split."
(interactive "P")
(+split-window-then :right arg))
(defun +split-window-below-then (&optional arg)
"Split window below, then prompt for a new buffer.
With optional ARG (\\[universal-argument]), just split."
(interactive "P")
(+split-window-then :below arg))
(defun +bytes (number unit)
"Convert NUMBER UNITs to bytes.
UNIT can be one of :kb, :mb, :gb, :tb, :pb, :eb, :zb, :yb; :kib, :mib, :gib,
:tib, :pib, :eib, :zib, :yib."
(* number (pcase unit
;; Base 10 units
(:kb 1000)
(:mb (* 1000 1000))
(:gb (* 1000 1000 1000))
(:tb (* 1000 1000 1000 1000))
(:pb (* 1000 1000 1000 1000 1000))
(:eb (* 1000 1000 1000 1000 1000 1000))
(:zb (* 1000 1000 1000 1000 1000 1000 1000))
(:yb (* 1000 1000 1000 1000 1000 1000 1000 1000))
;; Base 2 units
(:kib 1024)
(:mib (* 1024 1024))
(:gib (* 1024 1024 1024))
(:tib (* 1024 1024 1024 1024))
(:pib (* 1024 1024 1024 1024 1024))
(:eib (* 1024 1024 1024 1024 1024 1024))
(:zib (* 1024 1024 1024 1024 1024 1024 1024))
(:yib (* 1024 1024 1024 1024 1024 1024 1024 1024)))))
(provide 'acdw)
;;; acdw.el ends here
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