doomemacs/core/core-editor.el

;;; core-editor.el -*- lexical-binding: t; -*-

(defvar doom-detect-indentation-excluded-modes
  '(fundamental-mode pascal-mode so-long-mode)
  "A list of major modes in which indentation should be automatically
detected.")

(defvar-local doom-inhibit-indent-detection nil
  "A buffer-local flag that indicates whether `dtrt-indent' should try to detect
indentation settings or not. This should be set by editorconfig if it
successfully sets indent_style/indent_size.")

(defvar doom-inhibit-large-file-detection nil
  "If non-nil, inhibit large/long file detection when opening files.")

(defvar doom-large-file-p nil)
(put 'doom-large-file-p 'permanent-local t)

(defvar doom-large-file-size-alist '(("." . 1.0))
  "An alist mapping regexps (like `auto-mode-alist') to filesize thresholds.

If a file is opened and discovered to be larger than the threshold, Doom
performs emergency optimizations to prevent Emacs from hanging, crashing or
becoming unusably slow.

These thresholds are in MB, and is used by `doom--optimize-for-large-files-a'.")

(defvar doom-large-file-excluded-modes
  '(so-long-mode special-mode archive-mode tar-mode jka-compr
    git-commit-mode image-mode doc-view-mode doc-view-mode-maybe
    ebrowse-tree-mode pdf-view-mode tags-table-mode)
  "Major modes that `doom-check-large-file-h' will ignore.")


;;
;;; File handling

(defadvice! doom--prepare-for-large-files-a (size _ filename &rest _)
  "Sets `doom-large-file-p' if the file is considered large.

Uses `doom-large-file-size-alist' to determine when a file is too large. When
`doom-large-file-p' is set, other plugins can detect this and reduce their
runtime costs (or disable themselves) to ensure the buffer is as fast as
possible."
  :before #'abort-if-file-too-large
  (and (numberp size)
       (null doom-inhibit-large-file-detection)
       (ignore-errors
         (> size
            (* 1024 1024
               (assoc-default filename doom-large-file-size-alist
                              #'string-match-p))))
       (setq-local doom-large-file-p size)))

(add-hook! 'find-file-hook
  (defun doom-optimize-for-large-files-h ()
    "Trigger `so-long-minor-mode' if the file is large."
    (when (and doom-large-file-p buffer-file-name)
      (if (or doom-inhibit-large-file-detection
              (memq major-mode doom-large-file-excluded-modes))
          (kill-local-variable 'doom-large-file-p)
        (when (fboundp 'so-long-minor-mode) ; in case the user disabled it
          (so-long-minor-mode +1))
        (message "Large file detected! Cutting a few corners to improve performance...")))))


;; Resolve symlinks when opening files, so that any operations are conducted
;; from the file's true directory (like `find-file').
(setq find-file-visit-truename t
      vc-follow-symlinks t)

;; Disable the warning "X and Y are the same file". It's fine to ignore this
;; warning as it will redirect you to the existing buffer anyway.
(setq find-file-suppress-same-file-warnings t)

;; Create missing directories when we open a file that doesn't exist under a
;; directory tree that may not exist.
(add-hook! 'find-file-not-found-functions
  (defun doom-create-missing-directories-h ()
    "Automatically create missing directories when creating new files."
    (unless (file-remote-p buffer-file-name)
      (let ((parent-directory (file-name-directory buffer-file-name)))
        (and (not (file-directory-p parent-directory))
             (y-or-n-p (format "Directory `%s' does not exist! Create it?"
                               parent-directory))
             (progn (make-directory parent-directory 'parents)
                    t))))))

;; Don't generate backups or lockfiles. While auto-save maintains a copy so long
;; as a buffer is unsaved, backups create copies once, when the file is first
;; written, and never again until it is killed and reopened. This is better
;; suited to version control, and I don't want world-readable copies of
;; potentially sensitive material floating around our filesystem.
(setq create-lockfiles nil
      make-backup-files nil
      ;; But in case the user does enable it, some sensible defaults:
      version-control t     ; number each backup file
      backup-by-copying t   ; instead of renaming current file (clobbers links)
      delete-old-versions t ; clean up after itself
      kept-old-versions 5
      kept-new-versions 5
      backup-directory-alist (list (cons "." (concat doom-cache-dir "backup/")))
      tramp-backup-directory-alist backup-directory-alist)

;; But turn on auto-save, so we have a fallback in case of crashes or lost data.
;; Use `recover-file' or `recover-session' to recover them.
(setq auto-save-default t
      ;; Don't auto-disable auto-save after deleting big chunks. This defeats
      ;; the purpose of a failsafe. This adds the risk of losing the data we
      ;; just deleted, but I believe that's VCS's jurisdiction, not ours.
      auto-save-include-big-deletions t
      ;; Keep it out of `doom-emacs-dir' or the local directory.
      auto-save-list-file-prefix (concat doom-cache-dir "autosave/")
      tramp-auto-save-directory  (concat doom-cache-dir "tramp-autosave/")
      auto-save-file-name-transforms
      (list (list "\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'"
                  ;; Prefix tramp autosaves to prevent conflicts with local ones
                  (concat auto-save-list-file-prefix "tramp-\\2") t)
            (list ".*" auto-save-list-file-prefix t)))

(add-hook! 'after-save-hook
  (defun doom-guess-mode-h ()
    "Guess major mode when saving a file in `fundamental-mode'.

Likely, something has changed since the buffer was opened. e.g. A shebang line
or file path may exist now."
    (when (eq major-mode 'fundamental-mode)
      (let ((buffer (or (buffer-base-buffer) (current-buffer))))
        (and (buffer-file-name buffer)
             (eq buffer (window-buffer (selected-window))) ; only visible buffers
             (set-auto-mode))))))

(defadvice! doom--shut-up-autosave-a (fn &rest args)
  "If a file has autosaved data, `after-find-file' will pause for 1 second to
tell you about it. Very annoying. This prevents that."
  :around #'after-find-file
  (letf! ((#'sit-for #'ignore))
    (apply fn args)))

;; HACK Emacs generates long file paths for its auto-save files; long =
;;      `auto-save-list-file-prefix' + `buffer-file-name'. If too long, the
;;      filesystem will murder your family. To appease it, I compress
;;      `buffer-file-name' to a stable 40 characters.
;; TODO PR this upstream; should be a universal issue!
(defadvice! doom-make-hashed-auto-save-file-name-a (fn)
  "Compress the auto-save file name so paths don't get too long."
  :around #'make-auto-save-file-name
  (let ((buffer-file-name
         (if (or
              ;; Don't do anything for non-file-visiting buffers. Names
              ;; generated for those are short enough already.
              (null buffer-file-name)
              ;; If an alternate handler exists for this path, bow out.  Most of
              ;; them end up calling `make-auto-save-file-name' again anyway, so
              ;; we still achieve this advice's ultimate goal.
              (find-file-name-handler buffer-file-name
                                      'make-auto-save-file-name))
             buffer-file-name
           (sha1 buffer-file-name))))
    (funcall fn)))

;; HACK ...does the same for Emacs backup files, but also packages that use
;;      `make-backup-file-name-1' directly (like undo-tree).
(defadvice! doom-make-hashed-backup-file-name-a (fn file)
  "A few places use the backup file name so paths don't get too long."
  :around #'make-backup-file-name-1
  (let ((alist backup-directory-alist)
        backup-directory)
    (while alist
      (let ((elt (car alist)))
        (if (string-match (car elt) file)
            (setq backup-directory (cdr elt)
                  alist nil)
          (setq alist (cdr alist)))))
    (let ((file (funcall fn file)))
      (if (or (null backup-directory)
              (not (file-name-absolute-p backup-directory)))
          file
        (expand-file-name (sha1 (file-name-nondirectory file))
                          (file-name-directory file))))))


;;
;;; Formatting

;; Favor spaces over tabs. Pls dun h8, but I think spaces (and 4 of them) is a
;; more consistent default than 8-space tabs. It can be changed on a per-mode
;; basis anyway (and is, where tabs are the canonical style, like go-mode).
(setq-default indent-tabs-mode nil
              tab-width 4)

;; Only indent the line when at BOL or in a line's indentation. Anywhere else,
;; insert literal indentation.
(setq-default tab-always-indent nil)

;; Make `tabify' and `untabify' only affect indentation. Not tabs/spaces in the
;; middle of a line.
(setq tabify-regexp "^\t* [ \t]+")

;; An archaic default in the age of widescreen 4k displays? I disagree. We still
;; frequently split our terminals and editor frames, or have them side-by-side,
;; using up more of that newly available horizontal real-estate.
(setq-default fill-column 80)

;; Continue wrapped words at whitespace, rather than in the middle of a word.
(setq-default word-wrap t)
;; ...but don't do any wrapping by default. It's expensive. Enable
;; `visual-line-mode' if you want soft line-wrapping. `auto-fill-mode' for hard
;; line-wrapping.
(setq-default truncate-lines t)
;; If enabled (and `truncate-lines' was disabled), soft wrapping no longer
;; occurs when that window is less than `truncate-partial-width-windows'
;; characters wide. We don't need this, and it's extra work for Emacs otherwise,
;; so off it goes.
(setq truncate-partial-width-windows nil)

;; This was a widespread practice in the days of typewriters. I actually prefer
;; it when writing prose with monospace fonts, but it is obsolete otherwise.
(setq sentence-end-double-space nil)

;; The POSIX standard defines a line is "a sequence of zero or more non-newline
;; characters followed by a terminating newline", so files should end in a
;; newline. Windows doesn't respect this (because it's Windows), but we should,
;; since programmers' tools tend to be POSIX compliant (and no big deal if not).
(setq require-final-newline t)

;; Default to soft line-wrapping in text modes. It is more sensibile for text
;; modes, even if hard wrapping is more performant.
(add-hook 'text-mode-hook #'visual-line-mode)


;;
;;; Clipboard / kill-ring

;; Cull duplicates in the kill ring to reduce bloat and make the kill ring
;; easier to peruse (with `counsel-yank-pop' or `helm-show-kill-ring'.
(setq kill-do-not-save-duplicates t)


;;
;;; Extra file extensions to support

(nconc
 auto-mode-alist
 '(("/LICENSE\\'" . text-mode)
   ("\\.log\\'" . text-mode)
   ("rc\\'" . conf-mode)
   ("\\.\\(?:hex\\|nes\\)\\'" . hexl-mode)))


;;
;;; Built-in plugins

(use-package! autorevert
  ;; revert buffers when their files/state have changed
  :hook (focus-in . doom-auto-revert-buffers-h)
  :hook (after-save . doom-auto-revert-buffers-h)
  :hook (doom-switch-buffer . doom-auto-revert-buffer-h)
  :hook (doom-switch-window . doom-auto-revert-buffer-h)
  :config
  (setq auto-revert-verbose t ; let us know when it happens
        auto-revert-use-notify nil
        auto-revert-stop-on-user-input nil
        ;; Only prompts for confirmation when buffer is unsaved.
        revert-without-query (list "."))

  ;; `auto-revert-mode' and `global-auto-revert-mode' would, normally, abuse the
  ;; heck out of file watchers _or_ aggressively poll your buffer list every X
  ;; seconds. Too many watchers can grind Emacs to a halt if you preform
  ;; expensive or batch processes on files outside of Emacs (e.g. their mtime
  ;; changes), and polling your buffer list is terribly inefficient as your
  ;; buffer list grows into the hundreds.
  ;;
  ;; Doom does this lazily instead. i.e. All visible buffers are reverted
  ;; immediately when a) a file is saved or b) Emacs is refocused (after using
  ;; another app). Meanwhile, buried buffers are reverted only when they are
  ;; switched to. This way, Emacs only ever has to operate on, at minimum, a
  ;; single buffer and, at maximum, ~10 buffers (after all, when do you ever
  ;; have more than 10 windows in any single frame?).
  (defun doom-auto-revert-buffer-h ()
    "Auto revert current buffer, if necessary."
    (unless (or auto-revert-mode (active-minibuffer-window))
      (let ((auto-revert-mode t))
        (auto-revert-handler))))

  (defun doom-auto-revert-buffers-h ()
    "Auto revert stale buffers in visible windows, if necessary."
    (dolist (buf (doom-visible-buffers))
      (with-current-buffer buf
        (doom-auto-revert-buffer-h)))))


(use-package! recentf
  ;; Keep track of recently opened files
  :defer-incrementally easymenu tree-widget timer
  :hook (doom-first-file . recentf-mode)
  :commands recentf-open-files
  :custom (recentf-save-file (concat doom-cache-dir "recentf"))
  :config
  (setq recentf-auto-cleanup nil     ; Don't. We'll auto-cleanup on shutdown
        recentf-max-saved-items 200) ; default is 20

  (defun doom--recentf-file-truename-fn (file)
    (if (or (not (file-remote-p file))
            (equal "sudo" (file-remote-p file 'method)))
        (abbreviate-file-name (file-truename (tramp-file-name-localname tfile)))
      file))

  ;; Resolve symlinks, strip out the /sudo:X@ prefix in local tramp paths, and
  ;; abbreviate $HOME -> ~ in filepaths (more portable, more readable, & saves
  ;; space)
  (add-to-list 'recentf-filename-handlers #'doom--recentf-file-truename-fn)

  ;; Text properties inflate the size of recentf's files, and there is
  ;; no purpose in persisting them (Must be first in the list!)
  (add-to-list 'recentf-filename-handlers #'substring-no-properties)

  (add-hook! '(doom-switch-window-hook write-file-functions)
    (defun doom--recentf-touch-buffer-h ()
      "Bump file in recent file list when it is switched or written to."
      (when buffer-file-name
        (recentf-add-file buffer-file-name))
      ;; Return nil for `write-file-functions'
      nil))

  (add-hook! 'dired-mode-hook
    (defun doom--recentf-add-dired-directory-h ()
      "Add dired directories to recentf file list."
      (recentf-add-file default-directory)))

  ;; The most sensible time to clean up your recent files list is when you quit
  ;; Emacs (unless this is a long-running daemon session).
  (setq recentf-auto-cleanup (if (daemonp) 300))
  (add-hook 'kill-emacs-hook #'recentf-cleanup)

  ;; Otherwise `load-file' calls in `recentf-load-list' pollute *Messages*
  (advice-add #'recentf-load-list :around #'doom-shut-up-a))


(use-package! savehist
  ;; persist variables across sessions
  :defer-incrementally custom
  :hook (doom-first-input . savehist-mode)
  :custom (savehist-file (concat doom-cache-dir "savehist"))
  :config
  (setq savehist-save-minibuffer-history t
        savehist-autosave-interval nil     ; save on kill only
        savehist-additional-variables
        '(kill-ring                        ; persist clipboard
          register-alist                   ; persist macros
          mark-ring global-mark-ring       ; persist marks
          search-ring regexp-search-ring)) ; persist searches
  (add-hook! 'savehist-save-hook
    (defun doom-savehist-unpropertize-variables-h ()
      "Remove text properties from `kill-ring' to reduce savehist cache size."
      (setq kill-ring
            (mapcar #'substring-no-properties
                    (cl-remove-if-not #'stringp kill-ring))
            register-alist
            (cl-loop for (reg . item) in register-alist
                     if (stringp item)
                     collect (cons reg (substring-no-properties item))
                     else collect (cons reg item))))
    (defun doom-savehist-remove-unprintable-registers-h ()
      "Remove unwriteable registers (e.g. containing window configurations).
Otherwise, `savehist' would discard `register-alist' entirely if we don't omit
the unwritable tidbits."
      ;; Save new value in the temp buffer savehist is running
      ;; `savehist-save-hook' in. We don't want to actually remove the
      ;; unserializable registers in the current session!
      (setq-local register-alist
                  (cl-remove-if-not #'savehist-printable register-alist)))))


(use-package! saveplace
  ;; persistent point location in buffers
  :hook (doom-first-file . save-place-mode)
  :custom (save-place-file (concat doom-cache-dir "saveplace"))
  :config
  (defadvice! doom--recenter-on-load-saveplace-a (&rest _)
    "Recenter on cursor when loading a saved place."
    :after-while #'save-place-find-file-hook
    (if buffer-file-name (ignore-errors (recenter))))

  (defadvice! doom--inhibit-saveplace-in-long-files-a (fn &rest args)
    :around #'save-place-to-alist
    (unless doom-large-file-p
      (apply fn args)))

  (defadvice! doom--dont-prettify-saveplace-cache-a (fn)
    "`save-place-alist-to-file' uses `pp' to prettify the contents of its cache.
`pp' can be expensive for longer lists, and there's no reason to prettify cache
files, so this replace calls to `pp' with the much faster `prin1'."
    :around #'save-place-alist-to-file
    (letf! ((#'pp #'prin1)) (funcall fn))))


(use-package! server
  :when (display-graphic-p)
  :after-call doom-first-input-hook doom-first-file-hook focus-out-hook
  :custom (server-auth-dir (concat doom-emacs-dir "server/"))
  :defer 1
  :init
  (when-let (name (getenv "EMACS_SERVER_NAME"))
    (setq server-name name))
  :config
  (unless (server-running-p)
    (server-start)))


(after! tramp
  (setq remote-file-name-inhibit-cache 60
        tramp-completion-reread-directory-timeout 60
        tramp-verbose 1
        vc-ignore-dir-regexp (format "%s\\|%s\\|%s"
                                     vc-ignore-dir-regexp
                                     tramp-file-name-regexp
                                     "[/\\\\]node_modules")))


;;
;;; Packages

(use-package! better-jumper
  :hook (doom-first-input . better-jumper-mode)
  :commands doom-set-jump-a doom-set-jump-maybe-a doom-set-jump-h
  :preface
  ;; REVIEW Suppress byte-compiler warning spawning a *Compile-Log* buffer at
  ;; startup. This can be removed once gilbertw1/better-jumper#2 is merged.
  (defvar better-jumper-local-mode nil)
  :init
  (global-set-key [remap evil-jump-forward]  #'better-jumper-jump-forward)
  (global-set-key [remap evil-jump-backward] #'better-jumper-jump-backward)
  (global-set-key [remap xref-pop-marker-stack] #'better-jumper-jump-backward)
  (global-set-key [remap xref-go-back] #'better-jumper-jump-backward)
  (global-set-key [remap xref-go-forward] #'better-jumper-jump-forward)
  :config
  (defun doom-set-jump-a (fn &rest args)
    "Set a jump point and ensure fn doesn't set any new jump points."
    (better-jumper-set-jump (if (markerp (car args)) (car args)))
    (let ((evil--jumps-jumping t)
          (better-jumper--jumping t))
      (apply fn args)))

  (defun doom-set-jump-maybe-a (fn &rest args)
    "Set a jump point if fn actually moves the point."
    (let ((origin (point-marker))
          (result
           (let* ((evil--jumps-jumping t)
                  (better-jumper--jumping t))
             (apply fn args)))
          (dest (point-marker)))
      (unless (equal origin dest)
        (with-current-buffer (marker-buffer origin)
          (better-jumper-set-jump
           (if (markerp (car args))
               (car args)
             origin))))
      (set-marker origin nil)
      (set-marker dest nil)
      result))

  (defun doom-set-jump-h ()
    "Run `better-jumper-set-jump' but return nil, for short-circuiting hooks."
    (better-jumper-set-jump)
    nil)

  ;; Creates a jump point before killing a buffer. This allows you to undo
  ;; killing a buffer easily (only works with file buffers though; it's not
  ;; possible to resurrect special buffers).
  ;;
  ;; I'm not advising `kill-buffer' because I only want this to affect
  ;; interactively killed buffers.
  (advice-add #'kill-current-buffer :around #'doom-set-jump-a)

  ;; Create a jump point before jumping with imenu.
  (advice-add #'imenu :around #'doom-set-jump-a))


(use-package! dtrt-indent
  ;; Automatic detection of indent settings
  :when doom-interactive-p
  ;; I'm not using `global-dtrt-indent-mode' because it has hard-coded and rigid
  ;; major mode checks, so I implement it in `doom-detect-indentation-h'.
  :hook ((change-major-mode-after-body read-only-mode) . doom-detect-indentation-h)
  :config
  (defun doom-detect-indentation-h ()
    (unless (or (not after-init-time)
                doom-inhibit-indent-detection
                doom-large-file-p
                (memq major-mode doom-detect-indentation-excluded-modes)
                (member (substring (buffer-name) 0 1) '(" " "*")))
      ;; Don't display messages in the echo area, but still log them
      (let ((inhibit-message (not doom-debug-p)))
        (dtrt-indent-mode +1))))

  ;; Enable dtrt-indent even in smie modes so that it can update `tab-width',
  ;; `standard-indent' and `evil-shift-width' there as well.
  (setq dtrt-indent-run-after-smie t)
  ;; Reduced from the default of 5000 for slightly faster analysis
  (setq dtrt-indent-max-lines 2000)

  ;; always keep tab-width up-to-date
  (push '(t tab-width) dtrt-indent-hook-generic-mapping-list)

  (defvar dtrt-indent-run-after-smie)
  (defadvice! doom--fix-broken-smie-modes-a (fn &optional arg)
    "Some smie modes throw errors when trying to guess their indentation, like
`nim-mode'. This prevents them from leaving Emacs in a broken state."
    :around #'dtrt-indent-mode
    (let ((dtrt-indent-run-after-smie dtrt-indent-run-after-smie))
      (letf! ((defun symbol-config--guess (beg end)
                (funcall symbol-config--guess beg (min end 10000)))
              (defun smie-config-guess ()
                (condition-case e (funcall smie-config-guess)
                  (error (setq dtrt-indent-run-after-smie t)
                         (message "[WARNING] Indent detection: %s"
                                  (error-message-string e))
                         (message ""))))) ; warn silently
        (funcall fn arg)))))

(use-package! helpful
  ;; a better *help* buffer
  :commands helpful--read-symbol
  :hook (helpful-mode . visual-line-mode)
  :init
  (when EMACS29+
    ;; REVIEW See Wilfred/elisp-refs#35. Remove once fixed upstream.
    (defvar read-symbol-positions-list nil))

  ;; Make `apropos' et co search more extensively. They're more useful this way.
  (setq apropos-do-all t)

  (global-set-key [remap describe-function] #'helpful-callable)
  (global-set-key [remap describe-command]  #'helpful-command)
  (global-set-key [remap describe-variable] #'helpful-variable)
  (global-set-key [remap describe-key]      #'helpful-key)
  (global-set-key [remap describe-symbol]   #'helpful-symbol)

  (defun doom-use-helpful-a (fn &rest args)
    "Force FN to use helpful instead of the old describe-* commands."
    (letf! ((#'describe-function #'helpful-function)
            (#'describe-variable #'helpful-variable))
      (apply fn args)))

  (after! apropos
    ;; patch apropos buttons to call helpful instead of help
    (dolist (fun-bt '(apropos-function apropos-macro apropos-command))
      (button-type-put
       fun-bt 'action
       (lambda (button)
         (helpful-callable (button-get button 'apropos-symbol)))))
    (dolist (var-bt '(apropos-variable apropos-user-option))
      (button-type-put
       var-bt 'action
       (lambda (button)
         (helpful-variable (button-get button 'apropos-symbol))))))

  ;; HACK `help-fns--autoloaded-p's signature changed on Emacs 29. This
  ;;   suppressed the error until it is addressed upstream.
  (when EMACS29+
    (defadvice! doom--fix-helpful--autoloaded-p (fn &rest args)
      :around #'helpful--autoloaded-p
      (letf! (defun help-fns--autoloaded-p (sym _)
               (funcall help-fns--autoloaded-p sym))
        (apply fn args)))))


;;;###package imenu
(add-hook 'imenu-after-jump-hook #'recenter)


(use-package! smartparens
  ;; Auto-close delimiters and blocks as you type. It's more powerful than that,
  ;; but that is all Doom uses it for.
  :hook (doom-first-buffer . smartparens-global-mode)
  :commands sp-pair sp-local-pair sp-with-modes sp-point-in-comment sp-point-in-string
  :config
  (add-to-list 'doom-point-in-string-functions 'sp-point-in-string)
  (add-to-list 'doom-point-in-comment-functions 'sp-point-in-comment)
  ;; smartparens recognizes `slime-mrepl-mode', but not `sly-mrepl-mode', so...
  (add-to-list 'sp-lisp-modes 'sly-mrepl-mode)
  ;; Load default smartparens rules for various languages
  (require 'smartparens-config)
  ;; Overlays are too distracting and not terribly helpful. show-parens does
  ;; this for us already (and is faster), so...
  (setq sp-highlight-pair-overlay nil
        sp-highlight-wrap-overlay nil
        sp-highlight-wrap-tag-overlay nil)
  (with-eval-after-load 'evil
    ;; But if someone does want overlays enabled, evil users will be stricken
    ;; with an off-by-one issue where smartparens assumes you're outside the
    ;; pair when you're really at the last character in insert mode. We must
    ;; correct this vile injustice.
    (setq sp-show-pair-from-inside t)
    ;; ...and stay highlighted until we've truly escaped the pair!
    (setq sp-cancel-autoskip-on-backward-movement nil)
    ;; Smartparens conditional binds a key to C-g when sp overlays are active
    ;; (even if they're invisible). This disruptively changes the behavior of
    ;; C-g in insert mode, requiring two presses of the key to exit insert mode.
    ;; I don't see the point of this keybind, so...
    (setq sp-pair-overlay-keymap (make-sparse-keymap)))

  ;; The default is 100, because smartparen's scans are relatively expensive
  ;; (especially with large pair lists for some modes), we reduce it, as a
  ;; better compromise between performance and accuracy.
  (setq sp-max-prefix-length 25)
  ;; No pair has any business being longer than 4 characters; if they must, set
  ;; it buffer-locally. It's less work for smartparens.
  (setq sp-max-pair-length 4)

  ;; Silence some harmless but annoying echo-area spam
  (dolist (key '(:unmatched-expression :no-matching-tag))
    (setf (alist-get key sp-message-alist) nil))

  (add-hook! 'eval-expression-minibuffer-setup-hook
    (defun doom-init-smartparens-in-eval-expression-h ()
      "Enable `smartparens-mode' in the minibuffer for `eval-expression'.
This includes everything that calls `read--expression', e.g.
`edebug-eval-expression' Only enable it if
`smartparens-global-mode' is on."
      (when smartparens-global-mode (smartparens-mode +1))))
  (add-hook! 'minibuffer-setup-hook
    (defun doom-init-smartparens-in-minibuffer-maybe-h ()
      "Enable `smartparens' for non-`eval-expression' commands.
Only enable `smartparens-mode' if `smartparens-global-mode' is
on."
      (when (and smartparens-global-mode (memq this-command '(evil-ex)))
        (smartparens-mode +1))))

  ;; You're likely writing lisp in the minibuffer, therefore, disable these
  ;; quote pairs, which lisps doesn't use for strings:
  (sp-local-pair '(minibuffer-mode minibuffer-inactive-mode) "'" nil :actions nil)
  (sp-local-pair '(minibuffer-mode minibuffer-inactive-mode) "`" nil :actions nil)

  ;; Smartparens breaks evil-mode's replace state
  (defvar doom-buffer-smartparens-mode nil)
  (add-hook! 'evil-replace-state-exit-hook
    (defun doom-enable-smartparens-mode-maybe-h ()
      (when doom-buffer-smartparens-mode
        (turn-on-smartparens-mode)
        (kill-local-variable 'doom-buffer-smartparens-mode))))
  (add-hook! 'evil-replace-state-entry-hook
    (defun doom-disable-smartparens-mode-maybe-h ()
      (when smartparens-mode
        (setq-local doom-buffer-smartparens-mode t)
        (turn-off-smartparens-mode)))))


(use-package! so-long
  :hook (doom-first-file . global-so-long-mode)
  :config
  (setq so-long-threshold 400) ; reduce false positives w/ larger threshold
  ;; Don't disable syntax highlighting and line numbers, or make the buffer
  ;; read-only, in `so-long-minor-mode', so we can have a basic editing
  ;; experience in them, at least. It will remain off in `so-long-mode',
  ;; however, because long files have a far bigger impact on Emacs performance.
  (delq! 'font-lock-mode so-long-minor-modes)
  (delq! 'display-line-numbers-mode so-long-minor-modes)
  (delq! 'buffer-read-only so-long-variable-overrides 'assq)
  ;; ...but at least reduce the level of syntax highlighting
  (add-to-list 'so-long-variable-overrides '(font-lock-maximum-decoration . 1))
  ;; ...and insist that save-place not operate in large/long files
  (add-to-list 'so-long-variable-overrides '(save-place-alist . nil))
  ;; But disable everything else that may be unnecessary/expensive for large or
  ;; wide buffers.
  (appendq! so-long-minor-modes
            '(flycheck-mode
              spell-fu-mode
              eldoc-mode
              smartparens-mode
              highlight-numbers-mode
              better-jumper-local-mode
              ws-butler-mode
              auto-composition-mode
              undo-tree-mode
              highlight-indent-guides-mode
              hl-fill-column-mode))
  (defun doom-buffer-has-long-lines-p ()
    (unless (bound-and-true-p visual-line-mode)
      (let ((so-long-skip-leading-comments
             ;; HACK Fix #2183: `so-long-detected-long-line-p' tries to parse
             ;;      comment syntax, but comment state may not be initialized,
             ;;      leading to a wrong-type-argument: stringp error.
             (bound-and-true-p comment-use-syntax)))
        (so-long-detected-long-line-p))))
  (setq so-long-predicate #'doom-buffer-has-long-lines-p))


(use-package! ws-butler
  ;; a less intrusive `delete-trailing-whitespaces' on save
  :hook (doom-first-buffer . ws-butler-global-mode)
  :config
  ;; ws-butler normally preserves whitespace in the buffer (but strips it from
  ;; the written file). While sometimes convenient, this behavior is not
  ;; intuitive. To the average user it looks like whitespace cleanup is failing,
  ;; which causes folks to redundantly install their own.
  (setq ws-butler-keep-whitespace-before-point nil))

(provide 'core-editor)
;;; core-editor.el ends here