253 lines
9.7 KiB
EmacsLisp
253 lines
9.7 KiB
EmacsLisp
;;; acdw.el --- various meta-whatevers -*- lexical-binding: t -*-
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;;; Commentary:
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;; What's that saying about how the hardest things in computer science
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;; are naming and off-by-one errors? Well, the naming one I know very
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;; well. I've been trying to figure out a good way to prefix my
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;; bespoke functions, other stuff I found online, and various emacs
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;; lisp detritus for quite some time (I reckon at over a year, as of
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;; 2021-11-02). Finally, I found the answer in the writings of Daniel
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;; Mendler: I'll prefix everything with a `+' !
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;; To that end, pretty much everything in lisp/ will have a filename
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;; like "+org.el", except of course this file, and maybe a few
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;; /actually original/ libraries I haven't had the wherewithal to
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;; package out properly yet.
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;; Is it perfect? No. Is it fine? Yes. Here it is.
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;;; Code:
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(require 'diary-lib)
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;;; Define a directory and an expanding function
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(defmacro +define-dir (name directory &optional docstring inhibit-mkdir)
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"Define a variable and function NAME expanding to DIRECTORY.
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DOCSTRING is applied to the variable. Ensure DIRECTORY exists in
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the filesystem, unless INHIBIT-MKDIR is non-nil."
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(declare (indent 2))
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(unless inhibit-mkdir
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(make-directory (eval directory) :parents))
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`(progn
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(defvar ,name ,directory
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,(concat docstring (when docstring "\n")
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"Defined by `/define-dir'."))
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(defun ,name (file &optional mkdir)
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,(concat "Expand FILE relative to variable `" (symbol-name name) "'.\n"
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"If MKDIR is non-nil, the directory is created.\n"
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"Defined by `/define-dir'.")
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(let ((file-name (expand-file-name (convert-standard-filename file)
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,name)))
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(when mkdir
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(make-directory (file-name-directory file-name) :parents))
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file-name))))
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(defun +suppress-messages (oldfn &rest args) ; from pkal
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"Advice wrapper for suppressing `message'.
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OLDFN is the wrapped function, that is passed the arguments
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ARGS."
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(let ((msg (current-message)))
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(prog1
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(let ((inhibit-message t))
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(apply oldfn args))
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(when msg
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(message "%s" msg)))))
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(defun +sunrise-sunset--encode (time)
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"Encode diary-style time string into a time.
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This is stolen from `run-at-time'."
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(let ((hhmm (diary-entry-time time))
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(now (decode-time)))
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(encode-time (list 0 (% hhmm 100) (/ hhmm 100)
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(decoded-time-day now)
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(decoded-time-month now)
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(decoded-time-year now)
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nil -1
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(decoded-time-zone now)))))
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(defun +sunrise-sunset (sunrise-command sunset-command &optional reset)
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"Run SUNRISE-COMMAND at sunrise, and SUNSET-COMMAND at sunset.
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With RESET, this function will call itself with its own
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arguments. That's really only useful within this function
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itself."
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(let* ((times-regex (rx (* nonl)
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(: (any ?s ?S) "unrise") " "
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(group (repeat 1 2 digit) ":"
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(repeat 1 2 digit)
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(: (any ?a ?A ?p ?P) (any ?m ?M)))
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(* nonl)
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(: (any ?s ?S) "unset") " "
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(group (repeat 1 2 digit) ":"
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(repeat 1 2 digit)
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(: (any ?a ?A ?p ?P) (any ?m ?M)))
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(* nonl)))
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(ss (+suppress-messages #'sunrise-sunset))
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(_m (string-match times-regex ss))
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(sunrise (match-string 1 ss))
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(sunset (match-string 2 ss))
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(sunrise-time (+sunrise-sunset--encode sunrise))
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(sunset-time (+sunrise-sunset--encode sunset)))
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(cond
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((time-less-p nil sunrise-time)
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;; If it isn't sunrise yet, it's still dark---and so we need to run the
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;; sunset-command.
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(funcall sunset-command)
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(run-at-time sunrise nil sunrise-command))
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((time-less-p nil sunset-time)
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;; If it isn't sunset yet, it's still light---so we need to run the
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;; sunrise-command.
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(funcall sunrise-command)
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(run-at-time sunset nil sunset-command))
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(t (run-at-time "12:00am" nil sunset-command)))
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;; Reset everything at midnight
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(unless reset
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(run-at-time "12:00am" (* 60 60 24)
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#'+sunrise-sunset sunrise-command sunset-command t))))
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(defun +ensure-after-init (function)
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"Ensure FUNCTION runs after init, or now if already initialized.
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If Emacs is already started, run FUNCTION. Otherwise, add it to
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`after-init-hook'. FUNCTION is called with no arguments."
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(if after-init-time
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(funcall function)
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(add-hook 'after-init-hook function)))
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(defmacro +with-ensure-after-init (&rest body)
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"Ensure BODY forms run after init.
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Convenience macro wrapper around `+ensure-after-init'."
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(declare (indent 0) (debug (def-body)))
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`(+ensure-after-init (lambda () ,@body)))
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(defun +remember-prefix-arg (p-arg P-arg)
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"Display prefix ARG, in \"p\" and \"P\" `interactive' types.
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I keep forgetting how they differ."
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(interactive "p\nP")
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(message "p: %S P: %S" p-arg P-arg))
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(defmacro +defvar (var value &rest _)
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"Quick way to `setq' a variable from a `defvar' form."
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(declare (doc-string 3))
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`(setq ,var ,value))
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(defmacro +with-message (message &rest body)
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"Execute BODY, with MESSAGE.
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If body executes without errors, MESSAGE...Done will be displayed."
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(declare (indent 1))
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(let ((msg (gensym)))
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`(let ((,msg ,message))
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(unwind-protect (progn (message "%s..." ,msg)
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,@body)
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(message "%s...done" ,msg)))))
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(defun +mapc-some-buffers (func &optional predicate)
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"Perform FUNC on all buffers satisfied by PREDICATE.
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By default, act on all buffers.
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PREDICATE is a function called with one argument, the current
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buffer. FUNC is called with no arguments. Both are called
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within a `with-current-buffer' form."
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(let ((pred (or predicate t)))
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(dolist (buf (buffer-list))
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(with-current-buffer buf
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(when (if (or (eq (car-safe pred) 'closure)
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(fboundp pred))
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(funcall pred buf)
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pred)
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(funcall func))))))
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;; https://github.com/cstby/emacs.d/blob/main/init.el#L67
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(defun +clean-empty-lines (&optional begin end)
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"Remove duplicate empty lines from BEGIN to END.
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Called interactively, this function acts on the region, if
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active, or else the entire buffer."
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(interactive "*r")
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(unless (region-active-p)
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(setq begin (point-min)
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end (save-excursion
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(goto-char (point-max))
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(skip-chars-backward "\n[:space:]")
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(point))))
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(save-excursion
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(save-restriction
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(narrow-to-region begin end)
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(goto-char (point-min))
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(while (re-search-forward "\n\n\n+" nil :move)
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(replace-match "\n\n"))
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;; Insert a newline at the end.
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(goto-char (point-max))
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(unless (or (buffer-narrowed-p)
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(= (line-beginning-position) (line-end-position)))
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(insert "\n")))))
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(defun +open-paragraph ()
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"Open a paragraph after paragraph at point.
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A paragraph is defined as continguous non-empty lines of text
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surrounded by empty lines, so opening a paragraph means to make
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three blank lines, then place the point on the second one."
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(interactive "*")
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(unless (derived-mode-p 'special-mode 'lui-mode 'comint-mode)
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;; Go to next blank line. This /isn't/ `end-of-paragraph-text' because
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;; that's weird with org, and I'm guessing other modes too.
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(while (and (not (looking-at "^$"))
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(< (point) (point-max)))
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(forward-line 1))
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(newline)
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(delete-blank-lines)
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(newline 2)
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(previous-line)))
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(defun +split-window-then (&optional where arg)
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"Split the window into a new buffer.
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With non-nil ARG (\\[universal-argument] interactively), don't
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prompt for a buffer to switch to. This function will split the
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window using `split-window-sensibly', or open the new window in
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the direction specified by WHERE. WHERE is ignored when called
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interactively; if you want specific splitting, use
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`+split-window-right-then' or `+split-window-below-then'."
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(interactive "i\nP")
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;; TODO: Canceling at the switching phase leaves the point in the other
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;; window. Ideally, the user would see this as one action, meaning a cancel
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;; would return to the original window.
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(pcase where
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;; These directions are 'backward' to the OG Emacs split-window commands,
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;; because by default Emacs leaves the cursor in the original window. Most
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;; users probably expect a switch to the new window, at least I do.
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((or 'right :right) (split-window-right) (other-window 1))
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((or 'left :left) (split-window-right))
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((or 'below :below) (split-window-below) (other-window 1))
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((or 'above :above) (split-window-below))
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((pred null)
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(or (split-window-sensibly)
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(if (< (window-height) (window-width))
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(split-window-below)
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(split-window-right)))
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(other-window 1))
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(_ (user-error "Unknown WHERE paramater: %s" where)))
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(unless arg
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(condition-case nil
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(call-interactively
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(pcase (read-char "(B)uffer or (F)ile?")
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(?b (if (fboundp #'consult-buffer)
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#'consult-buffer
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#'switch-to-buffer))
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(?f #'find-file)
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(_ #'ignore)))
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(quit (delete-window)))))
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(defun +split-window-right-then (&optional arg)
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"Split window right, then prompt for a new buffer.
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With optional ARG (\\[universal-argument]), just split."
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(interactive "P")
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(+split-window-then :right arg))
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(defun +split-window-below-then (&optional arg)
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"Split window below, then prompt for a new buffer.
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With optional ARG (\\[universal-argument]), just split."
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(interactive "P")
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(+split-window-then :below arg))
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(provide 'acdw)
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;;; acdw.el ends here
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