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#+TITLE: Emacs, emacs, emacs
#+AUTHOR: Case Duckworth
#+PROPERTY: header-args :tangle config.el :comments both :mkdirp yes
#+STARTUP: 
#+EXPORT_FILE_NAME: README.md
#+OPTIONS: toc:nil
#+BANKRUPTCY_COUNT: 3.2
#+Time-stamp: <2021-01-02 10:01:56 acdw>

Why the hell not, let’s do this again.

* Basics

** About me

#+BEGIN_SRC emacs-lisp
(setq user-full-name "Case Duckworth"
      user-mail-address "acdw@acdw.net")
#+END_SRC

** Correct =exec-path=

Straight depends on Git, so I need to tell Emacs where different paths are.

#+BEGIN_SRC emacs-lisp
(let ((win-downloads "c:/Users/aduckworth/Downloads"))
  (dolist (path (list
		 ;; Linux
		 (expand-file-name "bin"
				   user-emacs-directory)
		 (expand-file-name "~/bin")
		 (expand-file-name "~/.local/bin")
		 (expand-file-name "~/Scripts")
		 ;; Windows
		 (expand-file-name "emacs/bin"
				   win-downloads)
		 (expand-file-name "m/usr/bin"
				   win-downloads)
		 (expand-file-name "m/mingw64/bin"
				   win-downloads)
		 (expand-file-name "PortableGit/bin"
				   win-downloads)
		 (expand-file-name "PortableGit/usr/bin"
				   win-downloads)))
    (when (file-exists-p path)
      (add-to-list 'exec-path path))))
#+END_SRC

** Package management

*** Straight.el

Straight can't bootstrap itself on Windows, so I've wrapped the
bootstrap code from straight's repo in a function.

#+BEGIN_SRC emacs-lisp
(defun acdw/bootstrap-straight ()
  "Bootstrap straight.el."
  (defvar bootstrap-version)
  (let ((bootstrap-file
	 (expand-file-name
	  "straight/repos/straight.el/bootstrap.el"
	  user-emacs-directory))
	(bootstrap-version 5))
    (unless (file-exists-p bootstrap-file)
      (with-current-buffer
	  (url-retrieve-synchronously
	   (concat
	    "https://raw.githubusercontent.com/"
	    "raxod502/straight.el/"
	    "develop/install.el")
	   'silent 'inhibit-cookies)
	(goto-char (point-max))
	(eval-print-last-sexp)))
    (load bootstrap-file nil 'nomessage)))
#+END_SRC

Now, I'll /try/ running it regular-style, ignoring the errors.  If it
doesn't work, I'll call git directly and clone the repo myself.

#+BEGIN_SRC emacs-lisp
  (unless (ignore-errors (acdw/bootstrap-straight))
    (message "%s" "Straight.el didn't bootstrap correctly.  Cloning directly...")
    (call-process "git" nil
		  (get-buffer-create "*bootstrap-straight-messages*") nil
		  "clone"
		  "https://github.com/raxod502/straight.el"
		  (expand-file-name "straight/repos/straight.el"
				    user-emacs-directory))
    (acdw/bootstrap-straight))
#+END_SRC

** Customize macros

*** Emulate use-package’s =:custom=

#+BEGIN_SRC emacs-lisp
(defmacro cuss (var val &optional docstring)
  "Basically, `:custom' from `use-package', but without `use-package'."
  (declare (doc-string 3)
	   (indent 2))
  `(funcall (or (get ',var 'custom-set) #'set-default)
	    ',var ,val))
#+END_SRC

*** Emulate use-package’s =:custom-face=, but better

#+begin_src emacs-lisp
  (defvar acdw--custom-faces ()
    "List of custom faces to run through acdw/set-custom-faces.")

  (defun acdw/set-custom-faces ()
    "Run `customize-set-faces' on `acdw--custom-faces'."
    (message "%s" "Customizing faces...")
    (apply #'custom-set-faces acdw--custom-faces))

  (defun cussface (spec)
    "Add SPEC to `acdw--custom-faces', and add a hook to run
  `acdw/set-custom-faces' after init."
    (add-to-list 'acdw--custom-faces spec)
    (add-hook 'after-init-hook #'acdw/set-custom-faces))
#+end_src

** Clean =.emacs.d=

#+BEGIN_SRC emacs-lisp
(straight-use-package 'no-littering)
(require 'no-littering)
#+END_SRC

*** Don’t clutter =init.el= with customizations

#+begin_src emacs-lisp
  (with-eval-after-load 'no-littering 
    (cuss custom-file (no-littering-expand-etc-file-name "custom.el")))
#+end_src

** Look and feel

*** Cursor

#+BEGIN_SRC emacs-lisp
(cuss cursor-type 'bar
  "Show a vertical bar for the cursor.")

(cuss cursor-in-non-selected-windows 'hbar
  "Show an empty box in inactive windows.")

;; Don't blink the cursor
(blink-cursor-mode -1)
#+END_SRC

*** Tool Bars

**** Tool bars and menu bars

#+BEGIN_SRC emacs-lisp
(cuss default-frame-alist
      '((tool-bar-lines . 0)
	(menu-bar-lines .0))
  "Setup the default frame alist.")

(menu-bar-mode -1)
(tool-bar-mode -1)
#+END_SRC

**** Scroll bars

#+BEGIN_SRC emacs-lisp
(add-to-list 'default-frame-alist
	     '(vertical-scroll-bars . nil))

(scroll-bar-mode -1)

(add-to-list 'default-frame-alist
	     '(horizontal-scroll-bars . nil))

(horizontal-scroll-bar-mode -1)
#+END_SRC

*** Dialogs

#+BEGIN_SRC emacs-lisp
(cuss use-dialog-box nil
  "Don't use dialog boxes to ask questions.")
#+END_SRC

**** Yes or no questions

#+BEGIN_SRC emacs-lisp
(fset 'yes-or-no-p #'y-or-n-p)
#+END_SRC

**** The Bell

#+BEGIN_SRC emacs-lisp
(defun acdw/ring-bell-function ()
  "Ring the bell."
  (let ((orig-face (face-foreground 'mode-line)))
    (set-face-foreground 'mode-line "#F2804F")
    (run-with-idle-timer
     0.1 nil
     (lambda (fg)
       (set-face-foreground 'mode-line fg))
     orig-face)))

(cuss ring-bell-function #'acdw/ring-bell-function)
#+END_SRC

*** Frames

**** Fringes

#+BEGIN_SRC emacs-lisp
(cuss indicate-empty-lines t
  "Show an indicator on the left fringe of empty lines past the
end of the buffer.")
(cuss indicate-buffer-boundaries 'right
  "Indicate the beginning and end of the buffer and whether it
  scrolls off-window in the right fringe.")
#+END_SRC

**** Minibuffer

#+BEGIN_SRC emacs-lisp
(cuss minibuffer-prompt-properties
    '(read-only t cursor-intangible t face minibuffer-prompt)
  "Keep the cursor away from the minibuffer prompt.")
#+END_SRC

**** Tabs

#+BEGIN_SRC emacs-lisp
(cuss tab-bar-tab-name-function
    #'tab-bar-tab-name-current-with-count
  "Show the tab name as the name of the current buffer, plus a
  count of the windows in the tab.")

(cuss tab-bar-show 1
  "Show the tab bar, when there's more than one tab.")
#+END_SRC

*** Windows

**** Winner mode

#+BEGIN_SRC emacs-lisp
(when (fboundp 'winner-mode)
  (winner-mode +1))
#+END_SRC

**** Switch windows

#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "M-o") #'other-window)
#+END_SRC

*** Buffers

**** Uniquify buffers

#+BEGIN_SRC emacs-lisp
(require 'uniquify)
(cuss uniquify-buffer-name-style 'forward
  "Uniquify buffers' names by going up the path trees until they
become unique.")
#+END_SRC

**** Startup buffers

#+BEGIN_SRC emacs-lisp
(cuss inhibit-startup-screen t
  "Don't show Emacs' startup buffer.")

(cuss initial-buffer-choice t
  "Start with *scratch*.")

(cuss initial-scratch-message ""
  "Empty *scratch* buffer.")
#+END_SRC

**** COMMENT Focus and move buffers directionally

Commented for now because I really need to figure out the keybindings I want to use for this.  The real issue is the collisions between Org-mode, Windows, and Emacs’ normal bindings.

#+begin_src emacs-lisp
  ;; change focus
  ;; for more on `ignore-error-wrapper', see
  ;; https://www.emacswiki.org/emacs/WindMove#h5o-3
  (defun ignore-error-wrapper (fn)
    "Funtion return new function that ignore errors.
     The function wraps a function with `ignore-errors' macro."
    (lexical-let ((fn fn))
      (lambda ()
	(interactive)
	(ignore-errors
	  (funcall fn)))))

  (global-set-key [S-left] (ignore-error-wrapper 'windmove-left))
  (global-set-key [S-right] (ignore-error-wrapper 'windmove-right))
  (global-set-key [S-up] (ignore-error-wrapper 'windmove-up))
  (global-set-key [S-down] (ignore-error-wrapper 'windmove-down))

  ;; shift buffers
  (straight-use-package 'buffer-move)

  (global-set-key (kbd "<C-S-up>")     'buf-move-up)
  (global-set-key (kbd "<C-S-down>")   'buf-move-down)
  (global-set-key (kbd "<C-S-left>")   'buf-move-left)
  (global-set-key (kbd "<C-S-right>")  'buf-move-right)
#+end_src

*** Modeline

**** Smart mode line

 #+BEGIN_SRC emacs-lisp
 (straight-use-package 'smart-mode-line)

 (cuss sml/no-confirm-load-theme t
   "Pass the NO-CONFIRM flag to `load-theme'.")

 (sml/setup)
 #+END_SRC

**** Rich minority

 Since this /comes/ with smart mode line, I’m just going to use it,
 instead of =diminish= or another package.  I do have to write this
 helper function, though, to add things to the whitelist.

 #+BEGIN_SRC emacs-lisp
 (defun rm/whitelist-add (regexp)
   "Add a REGEXP to the whitelist for `rich-minority'."
   (if (listp 'rm--whitelist-regexps)
       (add-to-list 'rm--whitelist-regexps regexp)
     (setq rm--whitelist-regexps `(,regexp)))
   (setq rm-whitelist
	 (mapconcat 'identity rm--whitelist-regexps "\\|")))

 (straight-use-package 'rich-minority)

 (rm/whitelist-add "^$")
 #+END_SRC

*** Theme

**** Modus Themes

#+BEGIN_SRC emacs-lisp
(straight-use-package 'modus-themes)

(cuss modus-themes-slanted-constructs t
  "Use more slanted constructs.")
(cuss modus-themes-bold-constructs t
  "Use more bold constructs.")

(cuss modus-themes-region 'bg-only
  "Only highlight the background of the selected region.")

(cuss modus-themes-org-blocks 'grayscale
  "Show org-blocks with a grayscale background.")
(cuss modus-themes-headings
    '((1 . line)
      (t . t))
  "Highlight top headings with `line' style, and others by default.")

(cuss modus-themes-scale-headings t
  "Scale headings by the ratios below.")
(cuss modus-themes-scale-1 1.1)
(cuss modus-themes-scale-2 1.15)
(cuss modus-themes-scale-3 1.21)
(cuss modus-themes-scale-4 1.27)
(cuss modus-themes-scale-5 1.33)

(load-theme 'modus-operandi t)
#+END_SRC

**** COMMENT Change themes based on time of day

Comment out because, for /some/ reason, =circadian-setup= fucks with =C-g= in the minibuffer.  WTF, amirite ?!

Anyway, I should probably be able to figure out how to properly change the theme on my own … later.

#+BEGIN_SRC emacs-lisp
(cuss calendar-latitude 30.4515)
(cuss calendar-longitude -91.1871)

(straight-use-package 'circadian)

(cuss circadian-themes '((:sunrise . modus-operandi)
			 (:sunset . modus-vivendi)))

(circadian-setup)
#+END_SRC

*** Fonts

**** Define fonts

#+BEGIN_SRC emacs-lisp
  (defun set-face-from-alternatives (face fonts)
    (catch :return
      (dolist (font fonts)
	(when (find-font (font-spec :family (car font)))
	  (apply #'set-face-attribute `(,face
					nil
					:family (car font)
					,@(cdr font)))
	  (throw :return font)))))

  (defun acdw/setup-fonts ()
    "Setup fonts.  This has to happen after the frame is setup for
  the first time, so it should be added to `window-setup-hook'.  It
  removes itself from that hook."
    (interactive)
    (when (display-graphic-p)
      (set-face-from-alternatives 'default
				  '(("Input Mono"
				     :height 105)
				    ("Go Mono"
				     :height 100)
				    ("Consolas"
				     :height 100)))

      (set-face-from-alternatives 'fixed-pitch
				  '(("Input Mono")
				    ("Go Mono")
				    ("Consolas")))

      (set-face-from-alternatives 'variable-pitch
				  '(("Input Serif")
				    ("Georgia")))

      (remove-function after-focus-change-function #'acdw/setup-fonts)))

  (add-function :before after-focus-change-function #'acdw/setup-fonts)
#+END_SRC

**** Custom faces

#+begin_src emacs-lisp
  (cussface '(font-lock-comment-face
	      ((t (:inherit (custom-comment italic variable-pitch))))))
#+end_src

**** Line spacing

#+BEGIN_SRC emacs-lisp
(cuss line-spacing 0.1
  "Add 10% extra space below each line.")
#+END_SRC

**** Underlines

#+begin_src emacs-lisp
  (cuss x-underline-at-descent-line t
    "Draw the underline at the same place as the descent line.")
#+end_src

**** Unicode Fonts

  #+BEGIN_SRC emacs-lisp
  (straight-use-package 'unicode-fonts)
  (require 'unicode-fonts)
  (unicode-fonts-setup)
  #+END_SRC

** Interactivity

*** Completing read

**** Shadow file names in =completing-read=.

 #+BEGIN_SRC emacs-lisp
 (cuss file-name-shadow-properties '(invisible t))

 (file-name-shadow-mode +1)
 #+END_SRC

**** Ignore case in =completing-read=

 #+BEGIN_SRC emacs-lisp
 (cuss completion-ignore-case t)
 (cuss read-buffer-completion-ignore-case t)
 (cuss read-file-name-completion-ignore-case t)
 #+END_SRC

**** Minibuffer recursivity

#+begin_src emacs-lisp
  (cuss enable-recursive-minibuffers t)
  (minibuffer-depth-indicate-mode +1)
#+end_src

**** Selectrum

 #+BEGIN_SRC emacs-lisp
 (straight-use-package 'selectrum)
 (require 'selectrum)
 (selectrum-mode +1)
 #+END_SRC

**** Prescient

 #+BEGIN_SRC emacs-lisp
 (straight-use-package 'prescient)
 (require 'prescient)
 (prescient-persist-mode +1)

 (straight-use-package 'selectrum-prescient)
 (require 'selectrum-prescient)
 (selectrum-prescient-mode +1)
 #+END_SRC

**** Consult

 #+BEGIN_SRC emacs-lisp
   (straight-use-package '(consult
			   :host github
			   :repo "minad/consult"))
   (require 'consult)

   (straight-use-package '(consult-selectrum
			   :host github
			   :repo "minad/consult"))
   (require 'consult-selectrum)

   (with-eval-after-load 'consult
     (define-key ctl-x-map "b" #'consult-buffer)
     (define-key ctl-x-map (kbd "C-r") #'consult-buffer)
     (define-key ctl-x-map "4b" #'consult-buffer-other-window)
     (define-key ctl-x-map "5b" #'consult-buffer-other-frame)

     (define-key goto-map "o" #'consult-outline)
     (define-key goto-map "g" #'consult-line)
     (define-key goto-map (kbd "M-g") #'consult-line)
     (define-key goto-map "l" #'consult-line)
     (define-key goto-map "m" #'consult-mark)
     (define-key goto-map "i" #'consult-imenu)
     (define-key goto-map "e" #'consult-error)

     (global-set-key (kbd "M-y") #'consult-yank-pop)

     (define-key help-map "a" #'consult-apropos)

     (fset 'multi-occur #'consult-multi-occur))
 #+END_SRC

**** Marginalia

 #+BEGIN_SRC emacs-lisp
 (straight-use-package '(marginalia
			 :host github
			 :repo "minad/marginalia"
			 :branch "main"))

 (cuss marginalia-annotators
     '(marginalia-annotators-heavy
       marginalia-annotators-light))

 (marginalia-mode +1)
 #+END_SRC

**** COMMENT Ido

[[https://wandersoncferreira.github.io/blog/ido/][Let’s try this out]].

#+begin_src emacs-lisp
  (defun ido-choose-from-recentf ()
    "Use ido to select recently visited files."
    (interactive)
    (find-file (ido-completing-read "Open file: " recentf-list nil t)))

  (defun bk/go-straight-home ()
    (interactive)
    (cond
     ((looking-back "~/") (insert "projects/"))
     ((looking-back "/") (insert "~/"))
     (:else (call-interactively 'self-insert-command))))

  (defun ido-disable-line-truncation ()
    (set (make-local-variable 'truncate-lines) nil))

  (defun ido-define-keys ()
    (define-key ido-completion-map (kbd "C-n") 'ido-next-match)
    (define-key ido-completion-map (kbd "C-p") 'ido-prev-match))

  (setq ido-enable-flex-matching t
	ido-use-filename-at-point nil
	ido-create-new-buffer 'always
	confirm-nonexistent-file-or-buffer nil
	completion-ignored-extensions (cons "*.aux" completion-ignored-extensions)
	max-mini-window-height 0.5
	ido-enable-tramp-completion t
	ido-auto-merge-work-directories-length -1
	ido-confirm-unique-completion t
	ido-default-file-method 'selected-window
	ido-case-fold t
	ido-show-dot-for-dired t
	ido-everywhere t
	ido-ignore-buffers (list (rx (or (and bos  " ")
					 (and bos
					      (or "*Completions*"
						  "*Compile-Log*"
						  "*Ido Completions*"
						  "*Shell Command Output*"
						  "*vc-diff*")
					      eos))))
	ido-decorations (quote ("\n-> " "" "\n " "\n ..." "[" "]" "
	[No match]" " [Matched]" " [Not readable]" " [Too big]" "
	[Confirm]")))

  (with-eval-after-load 'ido
    (define-key ido-common-completion-map (kbd "M-SPC") 'just-one-space)
    (define-key ido-common-completion-map (kbd "SPC") 'self-insert-command)
    (define-key ido-file-completion-map (kbd "~") 'bk/go-straight-home)

    (add-hook 'ido-setup-hook 'ido-define-keys)

    (add-hook 'ido-minibuffer-setup-hook 'ido-disable-line-truncation)

    (set-default 'imenu-auto-rescan t)

    (add-to-list 'ido-ignore-directories "target")
    (add-to-list 'ido-ignore-directories "node_modules")
    )

  (defun setup-ido-mode ()
    (require 'ido)
    (ido-mode +1)
    (ido-everywhere +1))

  (add-hook 'after-init-hook #'setup-ido-mode)
#+end_src

*** Completion

#+begin_src emacs-lisp
  (global-set-key (kbd "M-/") #'hippie-expand)
#+end_src

** Keyboard

*** =ESC= cancels all

#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "<escape>") #'keyboard-escape-quit)
#+END_SRC

*** Personal prefix key: =C-z=

#+BEGIN_SRC emacs-lisp
(defvar acdw/map
  (let ((map (make-sparse-keymap))
	(c-z (global-key-binding "\C-z")))
    (global-unset-key "\C-z")
    (define-key global-map "\C-z" map)
    (define-key map "\C-z" c-z)
    map))

(run-hooks 'acdw/map-defined-hook)
#+END_SRC

** Mouse

*** Preserve screen position when scrolling with the mouse wheel

from [[https://www.reddit.com/r/emacs/comments/km9by4/weekly_tipstricketc_thread/ghg2c9d/][u/TheFrenchPoulp]].

#+BEGIN_SRC emacs-lisp
  (advice-add 'mwheel-scroll :around #'me/mwheel-scroll)

  (defun me/mwheel-scroll (original &rest arguments)
    "Like `mwheel-scroll' but preserve screen position.
  See `scroll-preserve-screen-position'."
    (let ((scroll-preserve-screen-position :always))
      (apply original arguments)))
#+end_src

** Persistence

*** Minibuffer history

#+BEGIN_SRC emacs-lisp
(require 'savehist)

(cuss savehist-additional-variables
    '(kill-ring
      search-ring
      regexp-search-ring)
  "Other variables to save alongside the minibuffer history.")

(cuss history-length t
  "Don't truncate history.")

(cuss history-delete-duplicates t
  "Delete history duplicates.")

(savehist-mode +1)
#+END_SRC

*** File places

#+BEGIN_SRC emacs-lisp
(require 'saveplace) ; this isn't required, but ... I like having it here

(cuss save-place-forget-unreadable-files t
  "Don't check if files are readable or not.")

(save-place-mode +1)
#+END_SRC

*** Recent files

#+BEGIN_SRC emacs-lisp
(require 'recentf)

(cuss recentf-max-menu-items 100
  "The maximum number of items in the recentf menu.")
(cuss recentf-max-saved-items nil
  "Don't limit the number of recent files.")

(with-eval-after-load 'no-littering
  (add-to-list 'recentf-exclude no-littering-var-directory)
  (add-to-list 'recentf-exclude no-littering-etc-directory))

(recentf-mode +1)

;; save the recentf-list every 5 minutes
(run-at-time nil (* 5 60) 'recentf-save-list)
#+END_SRC

** Undo

#+BEGIN_SRC emacs-lisp
(straight-use-package 'undo-fu)
(require 'undo-fu)

(global-set-key (kbd "C-/") #'undo-fu-only-undo)
(global-set-key (kbd "C-?") #'undo-fu-only-redo)

(straight-use-package 'undo-fu-session)
(require 'undo-fu-session)

(cuss undo-fu-session-incompatible-files
    '("/COMMIT_EDITMSG\\'"
      "/git-rebase-todo\\'")
  "A list of files that are incompatible with the concept of undo sessions.")

(with-eval-after-load 'no-littering
  (let ((dir (no-littering-expand-var-file-name "undos")))
    (make-directory dir 'parents)
    (cuss undo-fu-session-directory dir)))

(global-undo-fu-session-mode +1)
#+END_SRC

** Files

*** Encoding

**** UTF-8

 #+BEGIN_SRC emacs-lisp
 (set-language-environment "UTF-8")
 (set-terminal-coding-system 'utf-8)
 (cuss locale-coding-system 'utf-8)
 (set-default-coding-systems 'utf-8)
 (set-selection-coding-system 'utf-8)
 (prefer-coding-system 'utf-8)
 #+END_SRC

**** Convert all files to UNIX-style line endings

 from [[https://www.emacswiki.org/emacs/EndOfLineTips][Emacs Wiki]].

 #+BEGIN_SRC emacs-lisp
 (defun ewiki/no-junk-please-were-unixish ()
   "Convert line endings to UNIX, dammit."
   (let ((coding-str (symbol-name buffer-file-coding-system)))
     (when (string-match "-\\(?:dos\\|mac\\)$" coding-str)
       (set-buffer-file-coding-system 'unix))))
 #+END_SRC

 I add it to the ~find-file-hook~ /and/ ~before-save-hook~ because I
 don't want to ever work with anything other than UNIX line endings
 ever again.  I just don't care.  Even Microsoft Notepad can handle
 UNIX line endings, so I don't want to hear it.

 #+BEGIN_SRC emacs-lisp
 (add-hook 'find-file-hook #'ewiki/no-junk-please-were-unixish)
 (add-hook 'before-save-hook #'ewiki/no-junk-please-were-unixish)
 #+END_SRC

*** Backups

#+BEGIN_SRC emacs-lisp
  (cuss backup-by-copying 1)
  (cuss delete-old-versions -1)
  (cuss version-control t)
  (cuss vc-make-backup-files t)

  (with-eval-after-load 'no-littering
    (let ((dir (no-littering-expand-var-file-name "backup")))
      (make-directory dir 'parents)
      (cuss backup-directory-alist
	  `((".*" . ,dir)))))
#+END_SRC

*** Auto-saves

#+BEGIN_SRC emacs-lisp
(with-eval-after-load 'no-littering
  (let ((dir (no-littering-expand-var-file-name "autosaves")))
    (make-directory dir 'parents)
    (cuss auto-save-file-name-transforms
	`((".*" ,dir t))))

  (auto-save-visited-mode +1))
#+END_SRC

*** Auto-revert buffers to files on disk

#+BEGIN_SRC emacs-lisp
(global-auto-revert-mode +1)
#+END_SRC

*** Add a timestamp to files

#+BEGIN_SRC emacs-lisp
(add-hook 'before-save-hook #'time-stamp)
#+END_SRC

*** Require a final new line

#+BEGIN_SRC emacs-lisp
(cuss require-final-newline t)
#+END_SRC

** Text editing

*** Operate visually on lines

#+BEGIN_SRC emacs-lisp
(global-visual-line-mode +1)
#+END_SRC

*** Stay snappy with long-lined files

#+BEGIN_SRC emacs-lisp
(when (fboundp 'global-so-long-mode)
  (global-so-long-mode +1))
#+END_SRC

*** Killing & Yanking

**** Replace selection when typing

#+BEGIN_SRC emacs-lisp
(delete-selection-mode +1)
#+END_SRC

**** Work better with the system clipboard

#+BEGIN_SRC emacs-lisp
(cuss save-interprogram-paste-before-kill t
  "Save existing clipboard text into the kill ring before
  replacing it.")

(cuss yank-pop-change-selection t
  "Update the X selection when rotating the kill ring.")
#+END_SRC

*** Searching & Replacing

**** COMMENT Search with CtrlF

For right now, I’m /just/ using Anzu – I don’t like parts of =isearch= but … CtrlF doesn’t match with that sweet replace flow.

#+begin_src emacs-lisp
  (straight-use-package 'ctrlf)
  (ctrlf-mode +1)
#+end_src

**** Replace with Anzu

#+begin_src emacs-lisp
    (straight-use-package 'anzu)
    (require 'anzu)

    ;; show search count in the modeline
    (global-anzu-mode +1)

    (cuss anzu-replace-to-string-separator " → "
      "What to separate the search from the replacement.")

  (global-set-key [remap query-replace] #'anzu-query-replace)
  (global-set-key [remap query-replace-regexp] #'anzu-query-replace-regexp)

  (define-key isearch-mode-map [remap isearch-query-replace]  #'anzu-isearch-query-replace)
  (define-key isearch-mode-map [remap isearch-query-replace-regexp] #'anzu-isearch-query-replace-regexp)


#+end_src

* Programming

** Parentheses

*** Smart parentheses

#+BEGIN_SRC emacs-lisp
(straight-use-package 'smartparens)
(require 'smartparens-config)

;; replace show-paren

(cuss sp-show-pair-delay 0
  "Don't delay before showing the pairs.")
(cuss sp-show-pair-from-inside t
  "Highlight the enclosing pair when immediately inside.")

(add-hook 'prog-mode-hook #'show-smartparens-mode +1)

;; enable strict smartparens in prog mode
(add-hook 'prog-mode-hook #'smartparens-strict-mode)
#+END_SRC

** Indent aggressively

#+BEGIN_SRC emacs-lisp
(straight-use-package 'aggressive-indent)

(global-aggressive-indent-mode +1)
#+END_SRC

** Language-specific packages

*** Emacs lisp

#+BEGIN_SRC emacs-lisp
(cuss eval-expression-print-length nil
  "Don't truncate printed expressions by length.")
(cuss eval-expression-print-level nil
  "Don't truncate printed expressions by level.")
#+END_SRC

* Writing

** Visual fill column

*** Fix scrolling in margins

This has to be done /before/ loading the package.  It's included in =visual-fill-column=, too, but for some reason isn't loaded there.

#+BEGIN_SRC emacs-lisp
  (global-set-key [right-margin mouse-1] (global-key-binding [mouse-1])) ; #'mouse-set-point
  (global-set-key [right-margin mouse-2] (global-key-binding [mouse-2])) ; #'mouse-yank-primary
  (global-set-key [right-margin mouse-3] (global-key-binding [mouse-3])) ; #'mouse-save-then-kill
  (global-set-key [right-margin drag-mouse-1] #'ignore)
  (global-set-key [right-margin drag-mouse-2] #'ignore)
  (global-set-key [right-margin drag-mouse-3] #'ignore)
  (global-set-key [right-margin double-mouse-1] #'ignore)
  (global-set-key [right-margin double-mouse-2] #'ignore)
  (global-set-key [right-margin double-mouse-3] #'ignore)
  (global-set-key [right-margin triple-mouse-1] #'ignore)
  (global-set-key [right-margin triple-mouse-2] #'ignore)
  (global-set-key [right-margin triple-mouse-3] #'ignore)
  (global-set-key [left-margin mouse-1] (global-key-binding [mouse-1])) ; #'mouse-set-point
  (global-set-key [left-margin mouse-2] (global-key-binding [mouse-2])) ; #'mouse-yank-primary
  (global-set-key [left-margin mouse-3] (global-key-binding [mouse-3])) ; #'mouse-save-then-kill
  (global-set-key [left-margin drag-mouse-1] #'ignore)
  (global-set-key [left-margin drag-mouse-2] #'ignore)
  (global-set-key [left-margin drag-mouse-3] #'ignore)
  (global-set-key [left-margin double-mouse-1] #'ignore)
  (global-set-key [left-margin double-mouse-2] #'ignore)
  (global-set-key [left-margin double-mouse-3] #'ignore)
  (global-set-key [left-margin triple-mouse-1] #'ignore)
  (global-set-key [left-margin triple-mouse-2] #'ignore)
  (global-set-key [left-margin triple-mouse-3] #'ignore)

  (mouse-wheel-mode +1)

  (when (bound-and-true-p mouse-wheel-mode)
    (global-set-key [right-margin mouse-wheel-down-event] #'mwheel-scroll)
    (global-set-key [right-margin mouse-wheel-up-event] #'mwheel-scroll)
    (global-set-key [right-margin wheel-down] #'mwheel-scroll)
    (global-set-key [right-margin wheel-up] #'mwheel-scroll)
    (global-set-key [left-margin mouse-wheel-down-event] #'mwheel-scroll)
    (global-set-key [left-margin mouse-wheel-up-event] #'mwheel-scroll)
    (global-set-key [left-margin wheel-down] #'mwheel-scroll)
    (global-set-key [left-margin wheel-up] #'mwheel-scroll)
    (global-set-key [right-margin mouse-4] #'mwheel-scroll)
    (global-set-key [right-margin mouse-5] #'mwheel-scroll)
    (global-set-key [left-margin mouse-4] #'mwheel-scroll)
    (global-set-key [left-margin mouse-5] #'mwheel-scroll))
#+END_SRC

*** Load the package

#+BEGIN_SRC emacs-lisp
(straight-use-package 'visual-fill-column)

(cuss visual-fill-column-center-text nil
  "Whether to center the text in the frame.")

(cuss fill-column 84
  "Width of fill-column, and thus, visual-fill-column.")

(advice-add 'text-scale-adjust
	    :after #'visual-fill-column-adjust)

(global-visual-fill-column-mode +1)
#+END_SRC

** Typographical niceties

*** Variable pitch in text-modes

#+begin_src emacs-lisp
  (add-hook 'text-mode-hook #'variable-pitch-mode)
#+end_src

*** Typo mode

#+BEGIN_SRC emacs-lisp
(straight-use-package 'typo)

(add-hook 'text-mode-hook #'typo-mode)
#+END_SRC

* Applications

** Org mode

I’ve put org mode under Applications, as opposed to Writing, because it’s  more generally-applicable than that.

*** Basics

#+BEGIN_SRC emacs-lisp
  (straight-use-package 'org)

  (with-eval-after-load 'org
    (require 'org-tempo)
    (require 'ox-md)
    (define-key org-mode-map (kbd "M-n") #'outline-next-visible-heading)
    (define-key org-mode-map (kbd "M-p") #'outline-previous-visible-heading))

  (cuss org-hide-emphasis-markers t)
  (cuss org-fontify-done-headline t)
  (cuss org-fontify-whole-heading-line t)
  (cuss org-fontify-quote-and-verse-blocks t)
  (cuss org-pretty-entities t)
  (cuss org-src-tab-acts-natively t)
  (cuss org-src-fontify-natively t)
  (cuss org-src-window-setup 'current-window)
  (cuss org-confirm-babel-evaluate nil)
  (cuss org-directory "~/Org")
  (cuss org-ellipsis "…")
#+END_SRC

**** Tags

#+begin_src emacs-lisp
  (cuss org-tags-column 0
    "Show tags directly after the headline.
  This is the best-looking option with variable-pitch fonts.")

  (cussface
   '(org-tag
     ((t
       (:height 0.8 :weight normal :slant italic :foreground "grey40" :inherit
		(variable-pitch))))))
#+end_src

*** General

**** [[https://github.com/alphapapa/unpackaged.el#org-return-dwim][Org Return: DWIM]]

 #+BEGIN_SRC emacs-lisp
   (defun unpackaged/org-element-descendant-of (type element)
     "Return non-nil if ELEMENT is a descendant of TYPE.
   TYPE should be an element type, like `item' or `paragraph'.
   ELEMENT should be a list like that returned by `org-element-context'."
     ;; MAYBE: Use `org-element-lineage'.
     (when-let* ((parent (org-element-property :parent element)))
       (or (eq type (car parent))
	   (unpackaged/org-element-descendant-of type parent))))

   ;;;###autoload
   (defun unpackaged/org-return-dwim (&optional default)
     "A helpful replacement for `org-return'.  With prefix, call `org-return'.

   On headings, move point to position after entry content.  In
   lists, insert a new item or end the list, with checkbox if
   appropriate.  In tables, insert a new row or end the table."
     ;; Inspired by John Kitchin: http://kitchingroup.cheme.cmu.edu/blog/2017/04/09/A-better-return-in-org-mode/
     (interactive "P")
     (if default
	 (org-return)
       (cond
	;; Act depending on context around point.

	;; NOTE: I prefer RET to not follow links, but by uncommenting this block, links will be
	;; followed.

	;; ((eq 'link (car (org-element-context)))
	;;  ;; Link: Open it.
	;;  (org-open-at-point-global))

	((org-at-heading-p)
	 ;; Heading: Move to position after entry content.
	 ;; NOTE: This is probably the most interesting feature of this function.
	 (let ((heading-start (org-entry-beginning-position)))
	   (goto-char (org-entry-end-position))
	   (cond ((and (org-at-heading-p)
		       (= heading-start (org-entry-beginning-position)))
		  ;; Entry ends on its heading; add newline after
		  (end-of-line)
		  (insert "\n\n"))
		 (t
		  ;; Entry ends after its heading; back up
		  (forward-line -1)
		  (end-of-line)
		  (when (org-at-heading-p)
		    ;; At the same heading
		    (forward-line)
		    (insert "\n")
		    (forward-line -1))
		  ;; FIXME: looking-back is supposed to be called with more arguments.
		  (while (not (looking-back (rx (repeat 3 (seq (optional blank) "\n"))) nil))
		    (insert "\n"))
		  (forward-line -1)))))

	((org-at-item-checkbox-p)
	 ;; Checkbox: Insert new item with checkbox.
	 (org-insert-todo-heading nil))

	((org-in-item-p)
	 ;; Plain list.  Yes, this gets a little complicated...
	 (let ((context (org-element-context)))
	   (if (or (eq 'plain-list (car context))  ; First item in list
		   (and (eq 'item (car context))
			(not (eq (org-element-property :contents-begin context)
				 (org-element-property :contents-end context))))
		   (unpackaged/org-element-descendant-of 'item context))  ; Element in list item, e.g. a link
	       ;; Non-empty item: Add new item.
	       (org-insert-item)
	     ;; Empty item: Close the list.
	     ;; TODO: Do this with org functions rather than operating on the text. Can't seem to find the right function.
	     (delete-region (line-beginning-position) (line-end-position))
	     (insert "\n"))))

	((when (fboundp 'org-inlinetask-in-task-p)
	   (org-inlinetask-in-task-p))
	 ;; Inline task: Don't insert a new heading.
	 (org-return))

	((org-at-table-p)
	 (cond ((save-excursion
		  (beginning-of-line)
		  ;; See `org-table-next-field'.
		  (cl-loop with end = (line-end-position)
			   for cell = (org-element-table-cell-parser)
			   always (equal (org-element-property :contents-begin cell)
					 (org-element-property :contents-end cell))
			   while (re-search-forward "|" end t)))
		;; Empty row: end the table.
		(delete-region (line-beginning-position) (line-end-position))
		(org-return))
	       (t
		;; Non-empty row: call `org-return'.
		(org-return))))
	(t
	 ;; All other cases: call `org-return'.
	 (org-return)))))

   (with-eval-after-load 'org
     (define-key org-mode-map (kbd "RET") #'unpackaged/org-return-dwim))
 #+END_SRC

**** Insert blank lines around headers

 from [[https://github.com/alphapapa/unpackaged.el#ensure-blank-lines-between-headings-and-before-contents][unpackaged.el]].

 #+BEGIN_SRC emacs-lisp
 ;;;###autoload
 (defun unpackaged/org-fix-blank-lines (&optional prefix)
   "Ensure that blank lines exist between headings and between headings and their contents.
 With prefix, operate on whole buffer. Ensures that blank lines
 exist after each headings's drawers."
   (interactive "P")
   (org-map-entries (lambda ()
		      (org-with-wide-buffer
		       ;; `org-map-entries' narrows the buffer, which prevents us
		       ;; from seeing newlines before the current heading, so we
		       ;; do this part widened.
		       (while (not (looking-back "\n\n" nil))
			 ;; Insert blank lines before heading.
			 (insert "\n")))
		      (let ((end (org-entry-end-position)))
			;; Insert blank lines before entry content
			(forward-line)
			(while (and (org-at-planning-p)
				    (< (point) (point-max)))
			  ;; Skip planning lines
			  (forward-line))
			(while (re-search-forward org-drawer-regexp end t)
			  ;; Skip drawers. You might think that `org-at-drawer-p'
			  ;; would suffice, but for some reason it doesn't work
			  ;; correctly when operating on hidden text.  This
			  ;; works, taken from `org-agenda-get-some-entry-text'.
			  (re-search-forward "^[ \t]*:END:.*\n?" end t)
			  (goto-char (match-end 0)))
			(unless (or (= (point) (point-max))
				    (org-at-heading-p)
				    (looking-at-p "\n"))
			  (insert "\n"))))
		    t (if prefix
			  nil
			'tree)))
 #+END_SRC

***** Add a before-save-hook

 #+BEGIN_SRC emacs-lisp
 (defun cribbed/org-mode-fix-blank-lines ()
   (when (eq major-mode 'org-mode)
     (let ((current-prefix-arg 4)) ; Emulate C-u
       (call-interactively 'unpackaged/org-fix-blank-lines))))

 (add-hook 'before-save-hook #'cribbed/org-mode-fix-blank-lines)
 #+END_SRC

*** Org Agenda

#+BEGIN_SRC emacs-lisp
  (cuss org-agenda-files
      (let ((list))
	(dolist (file '(;; add more files to this list
			"home.org"
			"work.org")
		      list)
	  (push (expand-file-name file org-directory) list))))

  (define-key acdw/map (kbd "C-a") #'org-agenda)

  (cuss org-todo-keywords
      '((sequence "RECUR(r)" "TODO(t)" "|" "DONE(d)")
	(sequence "|" "CANCELLED(c)")))
#+END_SRC

*** TODO Capture

** Git

#+begin_src emacs-lisp
  (straight-use-package 'magit)

  (define-key acdw/map "g" #'magit-status)
#+end_src

** Beancount mode

#+begin_src emacs-lisp
  (straight-use-package '(beancount-mode
			  :host github
			  :repo "beancount/beancount-mode"))
  (require 'beancount)

  (add-to-list 'auto-mode-alist '("\\.beancount\\'" . beancount-mode))

  (defun acdw/disable-aggressive-indent ()
    "Turn `aggressive-indent-mode' off for a buffer."
    (aggressive-indent-mode -1))

  (add-hook 'beancount-mode-hook #'outline-minor-mode)
  (add-hook 'beancount-mode-hook #'acdw/disable-aggressive-indent)

  (define-key beancount-mode-map (kbd "M-n") #'outline-next-visible-heading)
  (define-key beancount-mode-map (kbd "M-p") #'outline-previous-visible-heading)
#+end_src

* Appendices

** Emacs' files

*** init.el
    :PROPERTIES:
    :header-args: :tangle init.el
    :END:

I realized I didn’t need =early-init.el=, since it really only set =load-prefer-newer=.  So I’ve set that here, and wrapped the actual loading of config in a =let*= form that speeds up init, and loads the newer of either =config.org= or =config.el=.

  #+BEGIN_SRC emacs-lisp
    ;; init.el -*- lexical-binding: t -*-

    (setq load-prefer-newer t)

    (let* (;; Speed up init
	   (gc-cons-threshold most-positive-fixnum)
	   (file-name-handler-alist nil)
	   ;; Config file names
	   (conf (expand-file-name "config"
				   user-emacs-directory))
	   (conf-el (concat conf ".el"))
	   (conf-org (concat conf ".org")))
      (unless (and (file-newer-than-file-p conf-el conf-org)
		   (load conf 'no-error))
	(require 'org)
	(org-babel-load-file conf-org)))
  #+END_SRC

** Ease tangling and loading of Emacs' init

 #+BEGIN_SRC emacs-lisp
   (defun refresh-emacs (&optional disable-load)
     "Tangle `config.org', then byte-compile the resulting files.
   Then, load the byte-compilations unless passed with a prefix argument."
     (interactive "P")
     (let ((config (expand-file-name "config.org" user-emacs-directory)))
       (save-mark-and-excursion
	 (with-current-buffer (find-file config)
	   (let ((prog-mode-hook nil))
	     ;; generate the readme
	     (when (file-newer-than-file-p config (expand-file-name
						   "README.md"
						   user-emacs-directory))
	       (message "%s" "Exporting README.md...")
	       (require 'ox-md)
	       (with-demoted-errors "Problem exporting README.md: %S"
		 (org-md-export-to-markdown)))
	     ;; tangle config.org
	     (when (file-newer-than-file-p config (expand-file-name
						   "config.el"
						   user-emacs-directory))
	       (message "%s" "Tangling config.org...")
	       (require 'org)
	       (let ((inits (org-babel-tangle)))
		 ;; byte-compile resulting files
		 (message "%s" "Byte-compiling...")
		 (dolist (f inits)
		   (when (string-match "\\.el\\'" f)
		     (byte-compile-file f (not disable-load)))))))))))
 #+END_SRC

** Ancillary scripts

*** emacsdc

Here's a wrapper script that'll start =emacs --daemon= if there isn't
one, and then launch =emacsclient= with the arguments.  I'd recommend
installing with either ~ln -s bin/emacsdc $HOME/.local/bin/~, or
adding =$HOME/.local/bin= to your =$PATH=.
 
#+BEGIN_SRC sh :tangle bin/emacsdc :mkdirp yes :shebang "#!/bin/sh"
if ! emacsclient -nc "$@" 2>/dev/null; then
    emacs --daemon
    emacsclient -nc "$@"
fi
#+END_SRC

*** Emacs.cmd

Here's a wrapper script that'll run Emacs on Windows, with a custom
=$HOME=.  I have mine setup like this: Emacs is downloaded from [[https://mirrors.tripadvisor.com/gnu/emacs/windows/emacs-27/emacs-27.1-x86_64.zip][the
GNU mirror]] and unzipped to =~/Downloads/emacs/=.  =Emacs.cmd= sets
=$HOME= to =~/Downloads/emacshome/=, which is where =.emacs.d= is, and
whatever else I might want to throw in there.

#+begin_src bat :tangle bin/Emacs.cmd
  set HOME=%~dp0..\..\emacshome

  REM Run "Quick Mode"
  REM "%~dp0runemacs.exe" -Q %*

  REM Regular
  "%~dp0runemacs.exe" %*
#+end_src

** License
   :PROPERTIES:
   :header-args: :tangle LICENSE :comments no
   :END:

 Copyright © 2020 Case Duckworth <acdw@acdw.net>

 This work is free.  You can redistribute it and/or modify it under the
 terms of the Do What the Fuck You Want To Public License, Version 2,
 as published by Sam Hocevar.  See the =LICENSE= file, tangled from the
 following source block, for details.

 #+BEGIN_SRC text
 DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

 Version 2, December 2004

 Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>

 Everyone is permitted to copy and distribute verbatim or modified copies of
 this license document, and changing it is allowed as long as the name is changed.

 DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

    0. You just DO WHAT THE FUCK YOU WANT TO.
 #+END_SRC

*** Note on the license

 It's highly likely that the WTFPL is completely incompatible with the
 GPL, for what should be fairly obvious reasons.  To that, I say:

 *SUE ME, RMS!*