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;;; +defaults.el --- measured defaults for Emacs -*- lexical-binding: t -*-

;;; Commentary:

;; I find myself copy-pasting a lot of "boilerplate" type code when
;; bankrupting my Emacs config and starting afresh.  Instead of doing
;; that, I'm putting it here, where it'll be easier to include in my
;; config.

;; Of course, some might say I could just ... stop bankrupting my
;; Emacs.  But like, why would I want to?

;; Other notable packages include
;; https://git.sr.ht/~technomancy/better-defaults/

;;; Code:

(require 'early-init (locate-user-emacs-file "early-init.el"))

(defun +set-major-mode-from-buffer-name (&optional buf)
  "Set the major mode for BUF from the buffer's name.
Do this only if the buffer is not visiting a file."
  (unless buffer-file-name
    (let ((buffer-file-name (buffer-name buf)))
      (set-auto-mode))))

;;; General settings

(setq-default
 apropos-do-all t
 async-shell-command-buffer 'new-buffer
 async-shell-command-display-buffer nil
 auto-hscroll-mode 'current-line
 auto-revert-verbose nil
 auto-save-file-name-transforms `((".*" ,(.etc "auto-save/" t) t))
 auto-save-interval 60
 auto-save-list-file-prefix (.etc "auto-save/.saves-" t)
 auto-save-timeout 60
 auto-save-visited-interval 60
 auto-window-vscroll nil
 backup-by-copying t
 backup-directory-alist `((".*" . ,(.etc "backup/" t)))
 blink-cursor-blinks 1
 completion-category-defaults nil
 completion-category-overrides '((file (styles . (partial-completion))))
 completion-ignore-case t
 completion-styles '(substring partial-completion)
 cursor-in-non-selected-windows 'hollow
 cursor-type 'bar
 custom-file (.etc "custom.el")
 delete-old-versions t
 echo-keystrokes 0.1
 ediff-window-setup-function 'ediff-setup-windows-plain
 eldoc-echo-area-use-multiline-p nil
 eldoc-idle-delay 0.1
 enable-recursive-minibuffers t
 executable-prefix-env t
 fast-but-imprecise-scrolling t
 file-name-shadow-properties '(invisible t intangible t)
 frame-resize-pixelwise t
 global-auto-revert-non-file-buffers t
 global-mark-ring-max 100
 hscroll-step 1
 imenu-auto-rescan t
 indent-tabs-mode nil
 inhibit-startup-screen t
 initial-buffer-choice t
 kill-do-not-save-duplicates t
 kill-read-only-ok t
 kill-ring-max 500
 kill-whole-line t
 kmacro-ring-max 20
 load-prefer-newer t
 major-mode '+set-major-mode-from-buffer-name
 mark-ring-max 50
 minibuffer-eldef-shorten-default t
 minibuffer-prompt-properties (list 'read-only t
				    'cursor-intangible t
				    'face 'minibuffer-prompt)
 mode-require-final-newline 'visit-save
 mouse-drag-copy-region t
 mouse-yank-at-point t
 native-comp-async-report-warnings-errors 'silent
 read-answer-short t
 read-buffer-completion-ignore-case t
 read-extended-command-predicate (when (fboundp
				        'command-completion-default-include-p)
				   'command-completion-default-include-p)
 recenter-positions '(top middle bottom)
 regexp-search-ring-max 100
 regexp-search-ring-max 200
 save-interprogram-paste-before-kill t
 scroll-conservatively 101
 scroll-preserve-screen-position 1
 scroll-step 1
 search-ring-max 200
 search-ring-max 200
 sentence-end-double-space t
 set-mark-command-repeat-pop t
 show-paren-delay 0
 show-paren-style 'mixed
 show-paren-when-point-in-periphery t
 show-paren-when-point-inside-paren t
 tramp-backup-directory-alist backup-directory-alist
 use-dialog-box nil
 use-file-dialog nil
 use-short-answers t
 vc-follow-symlinks t
 vc-make-backup-files t
 version-control t
 view-read-only t
 visible-bell nil
 window-resize-pixelwise t
 x-select-enable-clipboard t
 x-select-enable-primary t
 yank-pop-change-selection t
 )

(when (version< emacs-version "28")
  (fset 'yes-or-no-p 'y-or-n-p))

;; Encoding -- UTF-8 everywhere
(setq-default 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
              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)

(pcase system-type
  ((or 'ms-dos 'windows-nt)
   (set-clipboard-coding-system 'utf-16-le)
   (set-selection-coding-system 'utf-16-le))
  (_
   (set-selection-coding-system 'utf-8)
   (set-clipboard-coding-system 'utf-8)))

;;; Modes

(dolist (enable-mode '(global-auto-revert-mode
		       blink-cursor-mode
		       electric-pair-mode
		       show-paren-mode
		       global-so-long-mode
		       minibuffer-depth-indicate-mode
		       file-name-shadow-mode
		       minibuffer-electric-default-mode
		       delete-selection-mode
		       column-number-mode))
  (when (fboundp enable-mode)
    (funcall enable-mode +1)))

(dolist (disable-mode '(tooltip-mode
                        tool-bar-mode
		        menu-bar-mode
		        scroll-bar-mode
		        horizontal-scroll-bar-mode))
  (when (fboundp disable-mode)
    (funcall disable-mode -1)))

;;; Hooks

(add-hook 'after-save-hook 'executable-make-buffer-file-executable-if-script-p)
(add-hook 'minibuffer-setup-hook 'cursor-intangible-mode)

;;; Bindings

(global-set-key (kbd "M-/") 'hippie-expand)
(global-set-key (kbd "M-=") 'count-words)
(global-set-key (kbd "C-x C-b") 'ibuffer)
(global-set-key (kbd "C-s") 'isearch-forward-regexp)
(global-set-key (kbd "C-r") 'isearch-backward-regexp)
(global-set-key (kbd "C-M-s") 'isearch-forward)
(global-set-key (kbd "C-M-r") 'isearch-backward)

;; C-h deletes backward - see https://idiomdrottning.org/bad-emacs-defaults
(global-set-key (kbd "C-h") 'delete-backward-char)
(keyboard-translate ?\C-h ?\C-?)

;;; Required libraries

(when (require 'uniquify nil :noerror)
  (setq-default uniquify-buffer-name-style 'forward
		uniquify-separator path-separator
		uniquify-after-kill-buffer-p t
		uniquify-ignore-buffers-re "^\\*"))

(when (require 'goto-addr)
  (if (fboundp 'global-goto-address-mode)
      (global-goto-address-mode +1)
    (add-hook 'after-change-major-mode-hook 'goto-address-mode)))

(when (require 'recentf nil :noerror)
  (setq-default recentf-save-file (.etc "recentf.el")
	        recentf-max-menu-items 100
	        recentf-max-saved-items nil
	        recentf-auto-cleanup 'mode)
  (add-to-list 'recentf-exclude .etc)
  (recentf-mode +1))

(when (require 'repeat nil :noerror)
  (setq-default repeat-exit-key "g"
	        repeat-exit-timeout 5)
  (repeat-mode +1))

(when (require 'savehist nil :noerror)
  (setq-default history-length t
	        history-delete-duplicates t
	        history-autosave-interval 60
	        savehist-file (.etc "savehist.el"))
  (dolist (var '(extended-command-history
		 global-mark-ring
		 kill-ring
		 regexp-search-ring
		 search-ring
		 mark-ring))
    (add-to-list 'savehist-additional-variables var))
  (savehist-mode +1))

(when (require 'saveplace nil :noerror)
  (setq-default save-place-file (.etc "places.el")
		save-place-forget-unreadable-files (eq system-type 'gnu/linux))
  (save-place-mode +1))

(when (require 'tramp)
  ;; thanks Irreal! https://irreal.org/blog/?p=895
  (add-to-list 'tramp-default-proxies-alist
               '(nil "\\`root\\'" "/ssh:%h:"))
  (add-to-list 'tramp-default-proxies-alist
               '((regexp-quote (system-name)) nil nil)))

(provide '+defaults)
;;; +defaults.el ends here