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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: 5d

;; 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:

;;; About me
(acdw/set
 '((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)
   (calendar-date-style iso)))

;;; Good defaults

;; Lines
(acdw/set '((fill-column 80)))
(global-display-fill-column-indicator-mode +1)
(add-hook 'text-mode-hook #'turn-on-auto-fill)
(add-hook 'prog-mode-hook #'turn-on-auto-fill)
(global-so-long-mode +1)

;; I don't want `visual-line-mode', because I really only want to wrap and
;; truncate lines.  Believe me, I know what I'm doing.
(acdw/set '((word-wrap t)
            (truncate-lines nil)))

;; Whitespace
(acdw/set '((whitespace-style
             (empty indentation space-before-tab space-after-tab))
            (indent-tabs-mode nil "We've lost this battle...")
            (tab-width 4)))
(add-hook 'before-save-hook #'whitespace-cleanup)

;; Pairs
(add-hook 'prog-mode-hook #'electric-pair-local-mode)
(acdw/set '((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)

;; Killing & Yanking
(delete-selection-mode +1)
(acdw/set '((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)))

;; Encoding
(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)
(acdw/set '((locale-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))))

;; Unique buffer names
(when (require 'uniquify)
  (acdw/set '((uniquify-buffer-name-style forward)
              (uniquify-separator "/")
              (uniquify-after-kill-buffer-p t)
              (uniquify-ignore-buffers-re "^\\*"))))

;; Backups
(acdw/set `((backup-by-copying t)
            (delete-old-versions -1)
            (version-control t)
            (vc-make-backup-files t)
            (backup-directory-alist ((".*" . ,(acdw/in-dir "backup/" t))))))
;; Autosaves
(acdw/set `((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))))
(auto-save-visited-mode +1)

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

;; Auto-revert
(when (require 'autorevert)
  (global-auto-revert-mode +1))
;; Save place
(when (require 'saveplace)
  (acdw/set
   `((save-place-file ,(acdw/in-dir "places.el"))
     (save-place-forget-unreadable-files ,(eq acdw/system :home))))
  (save-place-mode +1))
;; Recent files
(when (require 'recentf)
  (acdw/set
   `((recentf-save-file ,(acdw/in-dir "recentf.el"))
     (recentf-max-menu-items 100)
     (recentf-max-saved-items nil)
     (recentf-auto-cleanup 60 "Cleanup the recentf list when idle for 60s.")))
  (add-to-list 'recentf-exclude acdw/dir)
  (recentf-mode +1))

;; Move the custom file
(acdw/set `((custom-file ,(acdw/in-dir "custom.el"))))

;; Cursor
(acdw/set '((cursor-type bar)
            (cursor-in-non-selected-windows hollow)))

;; (defun hook--overwrite-mode-change-cursor ()
;;   (setq cursor-type (if overwrite-mode 'hbar 'bar)))
;; (add-hook 'overwrite-mode-hook #'hook--overwrite-mode-change-cursor)

;; Scrolling
(acdw/set '((auto-window-vscroll nil)
            (fast-but-imprecise-scrolling t)
            (scroll-margin 0)
            (scroll-conservatively 101)
            (scroll-preserve-screen-position 1)))

;; Bindings
(acdw/binds (("C-h" ehelp-command :after ("ehelp" nil nil 'keymap))
             ([remap just-one-space] cycle-spacing)
             ("M-/" hippie-expand)
             ("M-=" count-words)
             ("C-x C-b" ibuffer)))

;;; Startup
(acdw/set `((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"))))

;;; Windows settings
(when (eq acdw/system :work)
  (acdw/set `((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))))

(acdw/set '((default-directory (expand-file-name "~/"))))

;;; Minibuffer

(acdw/set '((minibuffer-prompt-properties (read-only t
                                           cursor-intangible t
                                           face minibuffer-prompt))
            (enable-recursive-minibuffers t)
            (file-name-shadow-properties (invisible t))))
(minibuffer-depth-indicate-mode +1)
(file-name-shadow-mode +1)

(acdw/pkg recursion-indicator
  :set '((recursion-indicator-general "%")
         (recursion-indicator-minibuffer "@"))
  :now ((recursion-indicator-mode +1)))

;; Save history
(when (require 'savehist)
  (acdw/set `((savehist-additional-variables
               (kill-ring search-ring regexp-search-ring))
              (history-length t)
              (history-delete-duplicates t)
              (savehist-autosave-interval 6)
              (savehist-file ,(acdw/in-dir "savehist.el"))))
  (savehist-mode +1))

;; God mode
(acdw/pkg god-mode
  :binds (("<escape>" god-local-mode)
          ("i" god-local-mode :map god-local-mode-map)
          ("." repeat :map god-local-mode-map)
          ("C-x C-1" delete-other-windows)
          ("C-x C-2" split-window-below)
          ("C-x C-3" split-window-right)
          ("C-x C-0" delete-window))
  :now ((defun acdw/god-mode-update-cursor ()
         (setq cursor-type (if (or god-local-mode buffer-read-only)
                               'box
                             'bar)))
        (defun acdw/god-mode-toggle-on-overwrite ()
          (if (bound-and-true-p overwrite-mode)
              (progn
                (setq cursor-type 'hbar)
                (god-local-mode-pause))
            (god-local-mode-resume)
            (acdw/god-mode-update-cursor)))
        (require 'god-mode)
        (god-mode))
  :hooks (((god-mode-enabled-hook god-mode-disabled-hook)
           acdw/god-mode-update-cursor)
          (overwrite-mode-hook acdw/god-mode-toggle-on-overwrite)))

;; Icomplete (-vertical)
(when (require 'icomplete)
  (acdw/set '((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)))
  (acdw/pkg orderless
    :set '((completion-styles (orderless))))
  (acdw/pkg icomplete-vertical
    :binds (("<down>" icomplete-forward-completions
                      :map icomplete-minibuffer-map)
            ("C-n" icomplete-forward-completions
                   :map icomplete-minibuffer-map)
            ("<up>" icomplete-backward-completions
                    :map icomplete-minibuffer-map)
            ("C-p" icomplete-backward-completions
                   :map icomplete-minibuffer-map)
            ("C-v" icomplete-vertical-toggle
                   :map icomplete-minibuffer-map)
            ("RET" icomplete-force-complete-and-exit
                   :map icomplete-minibuffer-map)
            ("C-j" minibuffer-complete-and-exit
                   :map icomplete-minibuffer-map))
    :now ((fido-mode -1)
          (icomplete-mode +1)
          (icomplete-vertical-mode +1))))

;; Consult
(acdw/pkg consult
  :binds (;; 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))
  :now ((autoload 'consult-register-preview "consult"))
  :set '((register-preview-delay 0)
         (register-preview-function #'consult-register-preview)))

;; begin-end
(acdw/pkg beginend
  :now ((beginend-global-mode)))

;; Marginalia
(acdw/pkg marginalia
  :set '((marginalia-annotators (marginalia-annotators-heavy
                                 marginalia-annotators-light)))
  :now ((marginalia-mode +1)))

;; Imenu
(when (require 'imenu)
  (acdw/set '((imenu-auto-rescan t))))

;; Fonts
(acdw/set-faces ((fixed-pitch . ((t (:inherit default))))))

;;; Packages

;; Undo-fu
(acdw/pkg undo-fu
  :binds (("C-/" undo-fu-only-undo)
          ("C-?" undo-fu-only-redo)))
(acdw/pkg undo-fu-session
  :set `((undo-fu-session-incompatible-files ("/COMMIT_EDITMSG\\'"
                                              "/git-rebase-todo\\'"))
         (undo-fu-session-directory ,(acdw/in-dir "undo/" t)))
  :then ((global-undo-fu-session-mode +1)))

;; Modus themes
(acdw/pkg (modus-themes
           :host gitlab
           :repo "protesilaos/modus-themes")
  :set `((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-scale-headings nil)
         (modus-themes-mode-line nil))
  :now ((acdw/sunrise-sunset #'modus-themes-load-operandi
                             #'modus-themes-load-vivendi)))

;; Expand-region
(acdw/pkg expand-region
  :binds (("C-=" er/expand-region)))

;; CRUX
(acdw/pkg crux
  :binds (("M-o" crux-other-window-or-switch-buffer)
          ([remap move-beginning-of-line] crux-move-beginning-of-line)
          ([remap kill-line] crux-kill-and-join-forward)))
;;; Frame title

(acdw/set `((frame-title-format
             "%b %+%* GNU Emacs")))

;;; Mode line

;; Minions
(acdw/pkg minions)

;; Simple mode line
(acdw/pkg simple-modeline
  :set '((simple-modeline-segments
          ((;; left
            acdw-modeline/modified
            acdw-modeline/buffer-name
            acdw-modeline/vc-branch
            simple-modeline-segment-position
            simple-modeline-segment-word-count)
           (;; right
            simple-modeline-segment-misc-info
            simple-modeline-segment-process
            acdw-modeline/god-mode-indicator
            acdw-modeline/minions
            simple-modeline-segment-major-mode))))
  :now ((require 'acdw-modeline)
        (simple-modeline-mode +1)))

;;; Magit

(acdw/pkg magit
  :binds (("g" magit-status :map acdw/leader))
  :set `((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)))))

;;; Web browsing

(acdw/set '((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)))

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

(acdw/hooks ((text-mode-hook goto-address-mode)
             (prog-mode-hook goto-address-prog-mode)))

;;; Gemini/gopher browsing

(acdw/pkg (elpher
           :repo "git://thelambdalab.xyz/elpher.git")
  :set '((elpher-ipv4-always t)
         (elpher-certificate-directory
          (acdw/in-var "elpher/")))
  :now ((acdw/bind-after-map "elpher" elpher-mode-map
          (("n" elpher-next-link :map-after "elpher")
           ("p" elpher-prev-link :map-after "elpher")
           ("o" elpher-follow-current-link :map-after "elpher")
           ("G" elpher-go-current :map-after "elpher")))
        (when (boundp 'god-exempt-major-modes)
          (add-to-list 'god-exempt-major-modes 'elpher-mode))))

(acdw/pkg (gemini-mode
           :repo "https://git.carcosa.net/jmcbray/gemini.el.git")
  :now ((add-to-list 'auto-mode-alist
                     '("\\.\\(gemini\\|gmi\\)\\'" . gemini-mode))))

;;; Dired
(acdw/pkg dired
  :local t
  :set `((dired-recursive-copies always)
            (dired-recursive-deletes always)
            (delete-by-moving-to-trash t)
            (dired-listing-switches "-Al")
            (ls-lisp-dirs-first t)
         (dired-dwim-target t))
  :now ((autoload 'dired-mode-map "dired" nil nil 'keymap)
        (acdw/pkg dired-subtree)
        (acdw/pkg dired-x
          :local t
          :binds (("C-x C-j" dired-jump)))
        (acdw/pkg dired-collapse
          :hooks ((dired-mode-hook dired-collapse-mode)))
        (defun hook--dired-mode ()
          (hl-line-mode +1)
          (dired-hide-details-mode +1)))
  :hooks ((dired-mode-hook hook--dired-mode))
  :binds (("i" dired-subtree-toggle :map dired-mode-map)))

;;; Eshell

(acdw/set `((eshell-directory-name ,(acdw/in-dir "eshell/" t))
            (eshell-aliases-file ,(acdw/in-dir "eshell/aliases" t))))

;;; Org-mode
(acdw/pkg (org
           :repo "https://code.orgmode.org/bzg/org-mode.git")
  :now ((require 'acdw-org))
  :set `((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))
  :hooks ((before-save-hook acdw/hook--org-mode-fix-blank-lines))
  :binds (("RET" unpackaged/org-return-dwim
           :map org-mode-map :map-after 'org)))

;;; Nov.el -- ebook reader
(acdw/pkg nov
  :now ((autoload #'nov-mode "nov")
        (add-to-list 'auto-mode-alist '("\\.epub\\'" . nov-mode)))
  :set `((nov-text-width ,fill-column)))

;;; 0x0 -- upload files
(acdw/pkg (0x0 :repo "https://git.sr.ht/~zge/nullpointer-emacs")
  :set '((0x0-default-host ttm)))

;;; Programming languages

;; General

(acdw/set `((smie-indent-basic ,tab-width)))

;; Formatting

(acdw/pkg (apheleia
           :host github
           :repo "raxod502/apheleia")
  :now ((apheleia-global-mode +1))
  :then ((add-to-list 'apheleia-formatters
                     '(shfmt . ("shfmt")))
        (add-to-list 'apheleia-mode-alist
                     '(sh-mode . shfmt))))

;; Shell(s)
(when (executable-find "shellcheck")
  (acdw/pkg flymake-shellcheck
    :hooks ((sh-mode-hook (flymake-mode
                           flymake-shellcheck-load)))))

(acdw/set `((sh-basic-offset ,tab-width)
            (sh-indent-after-case 0)
            (sh-indent-for-case-alt +)
            (sh-indent-for-case-label 0)))

(defun hook--sh-mode-indent-like-shfmt ()
  "Try to mirror `shfmt' formatting in shell scripts."
  (setq indent-tabs-mode t))
(add-hook 'sh-mode-hook #'hook--sh-mode-indent-like-shfmt)

;; Emacs lisp
(acdw/set '((eval-expression-print-length nil)
            (eval-expression-print-level nil)))

(when (require 'cl-lib)
  (setq-default 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)))

;; Racket
(acdw/pkg racket-mode)

;; Web stuff
(acdw/set '((css-indent-offset 2)
            (js-indent-level 2)
            (sgml-indent-offset 2)))

;;; Miscellaneous

(acdw/set '((disabled-command-function nil)
            (load-prefer-newer t)
            (comp-async-report-warnings-errors nil)))

(fset 'yes-or-no-p #'y-or-n-p)

;; Garbage collection
(defun hook--gc-cons-maximize ()
  (setq gc-cons-threshold most-positive-fixnum))
(add-hook 'minibuffer-setup-hook #'hook--gc-cons-maximize)

(defun hook--gc-cons-baseline ()
  (setq gc-cons-threshold gc-cons-threshold-basis))
(add-hook 'minibuffer-exit-hook #'hook--gc-cons-baseline)

(defun hook--gc-when-unfocused ()
  (acdw/when-unfocused #'garbage-collect))
(add-function :after after-focus-change-function
              #'hook--gc-when-unfocused)

;;; init.el ends here