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;;; init.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
;; Bankruptcy: 6

;; 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.

;;; Code:

;;; `setup' -- configuration macro
(straight-use-package '(setup :host nil
                        :repo "https://git.sr.ht/~zge/setup"))
(require 'setup)

;; shorthand for `customize-set-variable' (via setup)
(defmacro setc (&rest args)
  "Customize user options using ARGS like `setq'."
  (declare (debug setq))
  `(setup (:option ,@args)))

;; Install packages with `straight-use-package'
(setup-define :straight
  (lambda (recipe)
    `(straight-use-package ',recipe))
  :documentation "Install RECIPE with `straight-use-package'."
  :repeatable t
  :shorthand (lambda (sexp)
               (let ((recipe (cadr sexp)))
                 (if (consp recipe)
                     (car recipe)
                   recipe))))

;; Bind keys to `acdw/map'
(setup-define :acdw/map
  (lambda (key command)
    `(define-key acdw/map
         ,(if (stringp key) (kbd key) key)
       #',command))
  :documentation "Bind KEY to COMMAND in `acdw/map'."
  :debug '(form sexp)
  :repeatable t)

;; Bind keys to `acdw/leader'
(setup-define :acdw/leader
  (lambda (key command)
    `(define-key acdw/leader
         ,(if (stringp key) (kbd key) key)
       #',command))
  :documentation "Bind KEY to COMMAND in `acdw/leader' map."
  :debug '(form sexp)
  :repeatable t)

;; Bind keys, and autoload the functions they're bound to.
(setup-define :bind-autoload
  (lambda (key command)
    `(progn
       (autoload #',command (symbol-name setup-name))
       (define-key (symbol-value setup-map)
           ,(if (stringp key) (kbd key) key)
         #',command)))
  :documentation "Bind KEY to COMMAND, and autload COMMAND from FEATURE."
  :debug '(form sexp)
  :repeatable t)

;;; About me
(setc user-full-name "Case Duckworth"
      user-mail-address "acdw@acdw.net"
      calendar-location-name "Baton Rouge, LA"
      calendar-latitude 30.4
      calendar-longitude -91.1)

;;; Good defaults

;; Lines
(setc fill-column 80
      word-wrap t
      truncate-lines nil)
(add-hook 'text-mode-hook #'turn-on-auto-fill)
(add-hook 'prog-mode-hook #'turn-on-auto-fill)
(global-display-fill-column-indicator-mode +1)
(global-so-long-mode +1)

;; Whitespace
(setc whitespace-style
      '(empty indentation space-before-tab space-after-tab)
      indent-tabs-mode nil
      tab-width 4
      smie-indent-basic tab-width)
(add-hook 'before-save-hook #'whitespace-cleanup)

;; Pairs
(setc show-paren-delay 0
      show-paren-style 'mixed
      show-paren-when-point-inside-paren t
      show-paren-when-point-in-periphery t)
(show-paren-mode +1)
(add-hook 'prog-mode-hook #'electric-pair-local-mode)

;; Killing and yanking
(setc save-interprogram-paste-before-kill t
      yank-pop-change-selection t
      x-select-enable-clipboard t
      x-select-enable-primary t
      mouse-drag-copy-region t
      kill-do-not-save-duplicates t)
(delete-selection-mode +1)

;; Encoding
(setc local-coding-system 'utf-8-unix
      coding-system-for-read 'utf-8-unix
      coding-system-for-write 'utf-8-unix
      buffer-file-coding-system 'utf-8-unix
      org-export-coding-system 'utf-8-unix
      org-html-coding-system  'utf-8-unix
      default-process-coding-system '(utf-8-unix . utf-8-unix)
      x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING))
(set-charset-priority 'unicode)
(set-language-environment "UTF-8")
(prefer-coding-system 'utf-8-unix)
(set-default-coding-systems 'utf-8-unix)
(set-terminal-coding-system 'utf-8-unix)
(set-keyboard-coding-system 'utf-8-unix)
(set-selection-coding-system 'utf-8-unix)

;; Uniquify
(setup (:require uniquify)
    (:option uniquify-buffer-name-style 'forward
     uniquify-separator path-separator
     uniquify-after-kill-buffer-p t
     uniquify-ignore-buffers-re "^\\*"))

;; Files
(setc backup-directory-alist `((".*" . ,(acdw/in-dir "backup/" t)))
      tramp-backup-directory-alist backup-directory-alist
      auto-save-file-name-transforms `((".*" ,(acdw/in-dir "auto-save/" t) t))
      auto-save-list-file-prefix (acdw/in-dir "auto-save-list/.saves-" t)
      backup-by-copying t
      delete-old-versions t
      version-control t
      vc-make-backup-files t)
(auto-save-visited-mode +1)

(add-function :after after-focus-change-function
              (defun hook--auto-save-when-unfocused ()
                "Save all buffers when out of focus."
                (acdw/when-unfocused #'save-some-buffers t)))

(setup (:require autorevert)
    (global-auto-revert-mode +1))

(setup (:require saveplace)
    (:option save-place-file (acdw/in-dir "places.el")
     save-place-forget-unreadable-files (eq acdw/system :home))
  (save-place-mode +1))

(setup (:require recentf)
    (:option recentf-save-file (acdw/in-dir "recentf.el")
     recentf-max-menu-items 100
     recentf-max-saved-items nil
     recentf-auto-cleanup 60
     (append recentf-exclude) acdw/dir)
  (recentf-mode +1))

;; Minibuffer
(setc minibuffer-prompt-properties
      '(read-only t
        cursor-intangible t
        face minibuffer-prompt)
      enable-recursive-minibuffers t
      file-name-shadow-properties '(invisible t intangible t)
      read-answer-short t)
(minibuffer-depth-indicate-mode +1)
(file-name-shadow-mode +1)
(fset 'yes-or-no-p #'y-or-n-p)

(setup (:require savehist)
    (:option (append savehist-additional-variables) 'kill-ring
     (append savehist-additional-variables) 'search-ring
     (append savehist-additional-variables) 'regexp-search-ring
     history-length t
     history-delete-duplicates t
     savehist-autosave-interval 6
     savehist-file (acdw/in-dir "savehist.el"))
  (savehist-mode +1))

(setup (:require icomplete)
    (:option completion-ignore-case t
     read-buffer-completion-ignore-case t
     icomplete-delay-completions-threshold 0
     icomplete-max-delay-chars 0
     icomplete-compute-delay 0
     icomplete-show-matches-on-no-input t
     icomplete-with-buffer-completion-tables t
     icomplete-in-buffer t
     completion-styles '(partial-completion substring flex))
  (fido-mode -1)
  (icomplete-mode +1))

(setup imenu
    (:option imenu-auto-rescan t))

;; Cursor
(setc cursor-type 'bar
      cursor-in-non-selected-windows 'hollow)

;; Scrolling
(setc auto-window-vscroll nil
      fast-but-imprecise-scrolling t
      scroll-margin 0
      scroll-conservatively 101
      scroll-preserve-screen-position 1)

;; MS Windows
(setc w32-allow-system-shell t
      w32-pass-lwindow-to-system nil
      w32-lwindow-modifier 'super
      w32-pass-rwindow-to-system nil
      w32-rwindow-modifier 'super
      w32-pass-apps-to-system nil
      w32-apps-modifier 'hyper)

;; Dired
(setup dired
    (:option dired-recursive-copies 'always
     dired-recursive-deletes 'always
     delete-by-moving-to-trash t
     dired-listing-switches "-Al"
     ls-lisp-dirs-first t
     dired-ls-F-marks-symlinks t
     dired-no-confirm '(byte-compile
                        chgrp chmod chown copy
                        hardlink load move
                        shell touch symlink)
     dired-dwim-target t)
  (:also-load dired-x)
  (:hook dired-hide-details-mode
         hl-line-mode)
  (:acdw/map "C-x C-j" dired-jump))

;; Eshell
(setup eshell
    (:option eshell-directory-name (acdw/in-dir "eshell/" t)
     eshell-aliases-file (acdw/in-dir "eshell/aliases" t)))

;; Garbage collection
(add-hook 'minibuffer-setup-hook #'acdw/gc-disable)
(add-hook 'minibuffer-exit-hook #'acdw/gc-enable)
(add-function :after after-focus-change-function
              (defun hook--gc-when-unfocused ()
                (acdw/when-unfocused #'garbage-collect)))

;; Etc. good defaults
(setc custom-file (acdw/in-dir "custom.el")
      inhibit-startup-screen t
      initial-buffer-choice t
      initial-scratch-message (concat ";; Howdy, " (nth 0 (split-string
                                                           user-full-name))
                                      "!  Welcome to GNU Emacs.\n\n")
      default-directory (expand-file-name "~/")
      disabled-command-function nil
      load-prefer-newer t
      comp-async-report-warnings-errors nil
      frame-title-format "%b %+%* GNU Emacs")

;; Etc. bindings
(autoload 'ehelp-command "ehelp" nil nil 'keymap)
(define-key acdw/map (kbd "C-h") 'ehelp-command)
(define-key acdw/map [remap just-one-space] #'cycle-spacing)
(define-key acdw/map (kbd "M-/") #'hippie-expand)
(define-key acdw/map (kbd "M-=") #'count-words)
(define-key acdw/map (kbd "C-x C-b") #'ibuffer)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Here ends the package-less configuration.  Everything following requires a
;;; package to be downloaded. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;; Interactivity


;;;; Begin-end
(setup (:straight beginend)
    (beginend-global-mode +1))

;;;; Expand-region
(setup (:straight expand-region)
    (:acdw/map "C-=" er/expand-region))

;;;; CRUX
(setup (:straight crux)
    (:with-map acdw/map
      (:bind "M-o" crux-other-window-or-switch-buffer)
      (:bind "C-a" crux-move-beginning-of-line)
      (:bind "C-k" crux-kill-and-join-forward))
  (crux-reopen-as-root-mode +1))

;;; Functionality

;;;; Undo-fu
(setup (:straight undo-fu)
    (:with-map acdw/map
      (:bind "C-/" undo-fu-only-undo
             "C-?" undo-fu-only-redo)))

(setup (:straight undo-fu-session)
    (:option undo-fu-session-incompatible-files '("/COMMIT_EDITMSG\\'"
                                                  "/git-rebase-todo\\'")
     undo-fu-session-directory (acdw/in-dir "undo/" t))
  (global-undo-fu-session-mode +1))

;;; Minibuffer

;;;; Icomplete-vertical
(setup (:straight icomplete-vertical)
    (let ((map icomplete-minibuffer-map))
      (let ((command #'icomplete-forward-completions))
        (define-key map (kbd "<down>") command)
        (define-key map (kbd "C-n") command))
      (let ((command #'icomplete-backward-completions))
        (define-key map (kbd "<up>") command)
        (define-key map (kbd "C-p") command))
      (define-key map (kbd "RET") #'icomplete-force-complete-and-exit)
      (define-key map (kbd "C-RET") #'minibuffer-complete-and-exit))
  (icomplete-vertical-mode +1))

;;;; Orderless
(setup (:straight orderless)
    (:option (prepend completion-styles) 'orderless))

;;;; Consult
(setup (:straight consult)
    (:with-map acdw/map
      (:bind-autoload
       ;; C-c bindings (`mode-specific-map')
       "C-c h" consult-history
       "C-c m" consult-mode-command
       ;; C-x bindings (`ctl-x-map')
       "C-x M-:" consult-complex-command
       "C-x b" consult-buffer
       "C-x 4 b" consult-buffer-other-window
       "C-x 5 b" consult-buffer-other-frame
       "C-x r x" consult-register
       "C-x r b" consult-bookmark
       ;; M-g bindings (`goto-map')
       "M-g o" consult-outline
       "M-g m" consult-mark
       "M-g k" consult-global-mark
       "M-g i" consult-imenu
       "M-g e" consult-error
       ;; M-s bindings (`search-map')
       "M-s g" consult-grep	; alts: consult-git-grep, consult-ripgrep
       "M-s f" consult-find	; alts: consult-locate
       "M-s l" consult-line
       "M-s m" consult-multi-occur
       "M-s k" consult-keep-lines
       "M-s u" consult-focus-lines
       ;; Other bindings
       "M-y" consult-yank-pop
       "<f1> a" consult-apropos
       "C-h a" consult-apropos))
  (autoload 'consult-register-preview "consult")
  (:option register-preview-delay 0
           register-preview-function #'consult-register-preview))

;;;; Marginalia
(setup (:straight marginalia)
    (:option marginalia-annotators '(marginalia-annotators-heavy
                                     marginalia-annotators-light))
  (marginalia-mode +1))

;;; UI

;;;; Modus themes
(setup (:straight (modus-themes
                   :host gitlab
                   :repo "protesilaos/modus-themes"))
    (:option modus-themes-slanted-constructs t
     modus-themes-bold-constructs t
     modus-themes-region 'bg-only
     modus-themes-org-blocks 'grayscale
     modus-themes-headings '((1 . section)
                             (t . no-color))
     modus-themes-mode-line nil)
  (acdw/sunrise-sunset #'modus-themes-load-operandi
                       #'modus-themes-load-vivendi))

;;;; Mode line
(setup (:straight simple-modeline)
    (setup (:straight minions))
  (:option simple-modeline-segments
           '((acdw-modeline/modified
              acdw-modeline/buffer-name
              acdw-modeline/vc-branch
              simple-modeline-segment-position
              simple-modeline-segment-word-count)
             (simple-modeline-segment-misc-info
              simple-modeline-segment-process
              acdw-modeline/god-mode-indicator
              acdw-modeline/minions
              simple-modeline-segment-major-mode)))
  (require 'acdw-modeline)
  (simple-modeline-mode +1))

;;; Utilities

;;;; 0x0 -- upload files to a nullpointer
(setup (:straight (0x0 :host nil
                       :repo "https://git.sr.ht/~zge/nullpointer-emacs"))
    (:option 0x0-default-host 'ttm))

;;; Applications

;;;; Magit
(setup (:straight magit)
    (:acdw/leader "g" magit-status)
  (:option magit-display-buffer-function
           (defun magit-display-buffer-same-window (buffer)
             "Display BUFFER in the selected window like God intended."
             (display-buffer buffer '(display-buffer-same-window)))
           magit-popup-display-buffer-action '((display-buffer-same-window))))

;;;; File browsing
(setup (:straight dired-subtree)
    (define-key dired-mode-map "i" #'dired-subtree-toggle))

(setup (:straight dired-collapse)
    (:hook-into dired-mode))

;;;; Web browsing
(when (eq acdw/system :work)
  (add-to-list 'exec-path "C:/Program Files/Mozilla Firefox"))

(setc browse-url-browser-function 'browse-url-firefox
      browse-url-new-window-flag t
      browse-url-firefox-new-window-is-tab t
      shr-max-width fill-column
      shr-width fill-column)

(add-hook 'text-mode-hook #'goto-address-mode)
(add-hook 'prog-mode-hook #'goto-address-prog-mode)

;;;; Gemini/gopher browsing
(setup (:straight (elpher :host nil
                          :repo "git://thelambdalab.xyz/elpher.git"))
    (:option elpher-ipv4-always t
     elpher-certificate-directory (acdw/in-dir "elpher/"))
  (:bind "n" elpher-next-link
         "p" elpher-prev-link
         "o" elpher-follow-current-link
         "G" elpher-go-current)
  (:hook acdw/reading-mode)
  (when (boundp 'god-exempt-major-modes)
    (:option (append god-exempt-major-modes) 'elpher-mode)))

(setup (:straight (gemini-mode
                   :host nil
                   :repo "https://git.carcosa.net/jmcbray/gemini.el.git"))
    (:option (append auto-mode-alist)
     '("\\.\\(gemini\\|gmi\\)\\'" . gemini-mode)))

;;;; Read e-books (nov.el)
(setup (:straight nov)
    (:option nov-text-width fill-column
     (append auto-mode-alist) '("\\.epub\\'" . nov-mode)))

;;;; Org mode
(setup (:straight (org :host nil
                       :repo "https://code.orgmode.org/bzg/org-mode.git"))
    (require 'acdw-org)
  (:option org-directory "~/org"
           org-hide-emphasis-markers t
           org-fontify-whole-heading-line t
           org-fontify-done-headline t
           org-fontify-quote-and-verse-blocks t
           org-src-fontify-natively t
           org-pretty-entities t
           org-tags-column (- 0 fill-column -3)
           org-src-tab-acts-natively t
           org-src-window-setup 'current-window
           org-confirm-babel-evaluate nil
           org-adapt-indentation nil
           org-catch-invisible-edits 'smart
           org-special-ctrl-a/e t
           org-special-ctrl-k t
           org-imenu-depth 3
           org-export-headline-levels 8
           org-export-with-smart-quotes t
           org-export-with-sub-superscripts t)
  (:bind "RET" unpackaged/org-return-dwim)
  (add-hook 'before-save-hook #'acdw/hook--org-mode-fix-blank-lines))

;;; Programming languages

;;;; Formatting
(setup (:straight (apheleia :host github
                            :repo "raxod502/apheleia"))
    (apheleia-global-mode +1))

;;;; Emacs lisp
(setup emacs-lisp
    (require 'cl-lib)
  (:option eval-expression-print-length nil
           eval-expression-print-level nil
           lisp-indent-function #'common-lisp-indent-function)
  (put 'cl-flet 'common-lisp-indent-function
       (get 'flet 'common-lisp-indent-function))
  (put 'cl-labels 'common-lisp-indent-function
       (get 'labels 'common-lisp-indent-function))
  (put 'if 'common-lisp-indent-function 2)
  (put 'dotimes-protect 'common-lisp-indent-function
       (get 'when 'common-lisp-indent-function)))

;;;; Shell scripts
(setup sh
    (:option sh-basic-offset tab-width
     sh-indent-after-case 0
     sh-indent-for-case-alt '+
     sh-indent-for-case-label 0)
  (:local-set indent-tabs-mode t)
  
  (when (executable-find "shfmt")
    (:option (append apheleia-formatters) '(shfmt . ("shfmt"))
             (append apheleia-mode-alist) '(sh-mode . shfmt)))

  (when (executable-find "shellcheck")
    (straight-use-package 'flymake-shellcheck)
    (:hook flymake-mode
           flymake-shellcheck-load)))

;;;; Web languages
(setup (:straight web-mode)
    (:option css-level-offset 2
     js-indent-level 2
     sgml-indent-offset 2)
  (dolist (extension '("\\(p\\|dj\\)?html"
                       "html?"
                       "\\(tpl\\.\\)?php"
                       "[agj]sp"
                       "as[cp]x"
                       "erb"
                       "mustache"))
    (add-to-list 'auto-mode-alist
                 `(,(concat "\\." extension "\\'") . web-mode))))

;;; init.el ends here