(setq-default electric-indent-mode nil) ; But keep it globally disabled.
)))
-;;; Electric pairing.
-
-(defcustom electric-pair-pairs
- '((?\" . ?\"))
- "Alist of pairs that should be used regardless of major mode.
-
-Pairs of delimiters in this list are a fallback in case they have
-no syntax relevant to `electric-pair-mode' in the mode's syntax
-table.
-
-See also the variable `electric-pair-text-pairs'."
- :version "24.1"
- :type '(repeat (cons character character)))
-
-(defcustom electric-pair-text-pairs
- '((?\" . ?\" ))
- "Alist of pairs that should always be used in comments and strings.
-
-Pairs of delimiters in this list are a fallback in case they have
-no syntax relevant to `electric-pair-mode' in the syntax table
-defined in `electric-pair-text-syntax-table'"
- :version "24.4"
- :type '(repeat (cons character character)))
-
-(defcustom electric-pair-skip-self #'electric-pair-default-skip-self
- "If non-nil, skip char instead of inserting a second closing paren.
-
-When inserting a closing paren character right before the same character,
-just skip that character instead, so that hitting ( followed by ) results
-in \"()\" rather than \"())\".
-
-This can be convenient for people who find it easier to hit ) than C-f.
-
-Can also be a function of one argument (the closer char just
-inserted), in which case that function's return value is
-considered instead."
- :version "24.1"
- :type '(choice
- (const :tag "Never skip" nil)
- (const :tag "Help balance" electric-pair-default-skip-self)
- (const :tag "Always skip" t)
- function))
-
-(defcustom electric-pair-inhibit-predicate
- #'electric-pair-default-inhibit
- "Predicate to prevent insertion of a matching pair.
-
-The function is called with a single char (the opening char just inserted).
-If it returns non-nil, then `electric-pair-mode' will not insert a matching
-closer."
- :version "24.4"
- :type '(choice
- (const :tag "Conservative" electric-pair-conservative-inhibit)
- (const :tag "Help balance" electric-pair-default-inhibit)
- (const :tag "Always pair" ignore)
- function))
-
-(defcustom electric-pair-preserve-balance t
- "Non-nil if default pairing and skipping should help balance parentheses.
-
-The default values of `electric-pair-inhibit-predicate' and
-`electric-pair-skip-self' check this variable before delegating to other
-predicates reponsible for making decisions on whether to pair/skip some
-characters based on the actual state of the buffer's parenthesis and
-quotes."
- :version "24.4"
- :type 'boolean)
-
-(defcustom electric-pair-delete-adjacent-pairs t
- "If non-nil, backspacing an open paren also deletes adjacent closer.
-
-Can also be a function of no arguments, in which case that function's
-return value is considered instead."
- :version "24.4"
- :type '(choice
- (const :tag "Yes" t)
- (const :tag "No" nil)
- function))
-
-(defcustom electric-pair-open-newline-between-pairs t
- "If non-nil, a newline between adjacent parentheses opens an extra one.
-
-Can also be a function of no arguments, in which case that function's
-return value is considered instead."
- :version "24.4"
- :type '(choice
- (const :tag "Yes" t)
- (const :tag "No" nil)
- function))
-
-(defcustom electric-pair-skip-whitespace t
- "If non-nil skip whitespace when skipping over closing parens.
-
-The specific kind of whitespace skipped is given by the variable
-`electric-pair-skip-whitespace-chars'.
-
-The symbol `chomp' specifies that the skipped-over whitespace
-should be deleted.
-
-Can also be a function of no arguments, in which case that function's
-return value is considered instead."
- :version "24.4"
- :type '(choice
- (const :tag "Yes, jump over whitespace" t)
- (const :tag "Yes, and delete whitespace" 'chomp)
- (const :tag "No, no whitespace skipping" nil)
- function))
-
-(defcustom electric-pair-skip-whitespace-chars (list ?\t ?\s ?\n)
- "Whitespace characters considered by `electric-pair-skip-whitespace'."
- :version "24.4"
- :type '(choice (set (const :tag "Space" ?\s)
- (const :tag "Tab" ?\t)
- (const :tag "Newline" ?\n))
- (list character)))
-
-(defun electric-pair--skip-whitespace ()
- "Skip whitespace forward, not crossing comment or string boundaries."
- (let ((saved (point))
- (string-or-comment (nth 8 (syntax-ppss))))
- (skip-chars-forward (apply #'string electric-pair-skip-whitespace-chars))
- (unless (eq string-or-comment (nth 8 (syntax-ppss)))
- (goto-char saved))))
-
-(defvar electric-pair-text-syntax-table prog-mode-syntax-table
- "Syntax table used when pairing inside comments and strings.
-
-`electric-pair-mode' considers this syntax table only when point in inside
-quotes or comments. If lookup fails here, `electric-pair-text-pairs' will
-be considered.")
-
-(defun electric-pair-backward-delete-char (n &optional killflag untabify)
- "Delete characters backward, and maybe also two adjacent paired delimiters.
-
-Remaining behaviour is given by `backward-delete-char' or, if UNTABIFY is
-non-nil, `backward-delete-char-untabify'."
- (interactive "*p\nP")
- (let* ((prev (char-before))
- (next (char-after))
- (syntax-info (electric-pair-syntax-info prev))
- (syntax (car syntax-info))
- (pair (cadr syntax-info)))
- (when (and (if (functionp electric-pair-delete-adjacent-pairs)
- (funcall electric-pair-delete-adjacent-pairs)
- electric-pair-delete-adjacent-pairs)
- next
- (memq syntax '(?\( ?\" ?\$))
- (eq pair next))
- (delete-char 1 killflag))
- (if untabify
- (backward-delete-char-untabify n killflag)
- (backward-delete-char n killflag))))
-
-(defun electric-pair-backward-delete-char-untabify (n &optional killflag)
- "Delete characters backward, and maybe also two adjacent paired delimiters.
-
-Remaining behaviour is given by `backward-delete-char-untabify'."
- (interactive "*p\nP")
- (electric-pair-backward-delete-char n killflag t))
-
-(defun electric-pair-conservative-inhibit (char)
- (or
- ;; I find it more often preferable not to pair when the
- ;; same char is next.
- (eq char (char-after))
- ;; Don't pair up when we insert the second of "" or of ((.
- (and (eq char (char-before))
- (eq char (char-before (1- (point)))))
- ;; I also find it often preferable not to pair next to a word.
- (eq (char-syntax (following-char)) ?w)))
-
-(defun electric-pair-syntax-info (command-event)
- "Calculate a list (SYNTAX PAIR UNCONDITIONAL STRING-OR-COMMENT-START).
-
-SYNTAX is COMMAND-EVENT's syntax character. PAIR is
-COMMAND-EVENT's pair. UNCONDITIONAL indicates the variables
-`electric-pair-pairs' or `electric-pair-text-pairs' were used to
-lookup syntax. STRING-OR-COMMENT-START indicates that point is
-inside a comment of string."
- (let* ((pre-string-or-comment (nth 8 (save-excursion
- (syntax-ppss (1- (point))))))
- (post-string-or-comment (nth 8 (syntax-ppss (point))))
- (string-or-comment (and post-string-or-comment
- pre-string-or-comment))
- (table (if string-or-comment
- electric-pair-text-syntax-table
- (syntax-table)))
- (table-syntax-and-pair (with-syntax-table table
- (list (char-syntax command-event)
- (or (matching-paren command-event)
- command-event))))
- (fallback (if string-or-comment
- (append electric-pair-text-pairs
- electric-pair-pairs)
- electric-pair-pairs))
- (direct (assq command-event fallback))
- (reverse (rassq command-event fallback)))
- (cond
- ((memq (car table-syntax-and-pair)
- '(?\" ?\( ?\) ?\$))
- (append table-syntax-and-pair (list nil string-or-comment)))
- (direct (if (eq (car direct) (cdr direct))
- (list ?\" command-event t string-or-comment)
- (list ?\( (cdr direct) t string-or-comment)))
- (reverse (list ?\) (car reverse) t string-or-comment)))))
-
-(defun electric-pair--insert (char)
- (let ((last-command-event char)
- (blink-matching-paren nil)
- (electric-pair-mode nil))
- (self-insert-command 1)))
-
-(defun electric-pair--syntax-ppss (&optional pos where)
- "Like `syntax-ppss', but sometimes fallback to `parse-partial-sexp'.
-
-WHERE is list defaulting to '(string comment) and indicates
-when to fallback to `parse-partial-sexp'."
- (let* ((pos (or pos (point)))
- (where (or where '(string comment)))
- (quick-ppss (syntax-ppss))
- (quick-ppss-at-pos (syntax-ppss pos)))
- (if (or (and (nth 3 quick-ppss) (memq 'string where))
- (and (nth 4 quick-ppss) (memq 'comment where)))
- (with-syntax-table electric-pair-text-syntax-table
- (parse-partial-sexp (1+ (nth 8 quick-ppss)) pos))
- ;; HACK! cc-mode apparently has some `syntax-ppss' bugs
- (if (memq major-mode '(c-mode c++ mode))
- (parse-partial-sexp (point-min) pos)
- quick-ppss-at-pos))))
-
-;; Balancing means controlling pairing and skipping of parentheses so
-;; that, if possible, the buffer ends up at least as balanced as
-;; before, if not more. The algorithm is slightly complex because some
-;; situations like "()))" need pairing to occur at the end but not at
-;; the beginning. Balancing should also happen independently for
-;; different types of parentheses, so that having your {}'s unbalanced
-;; doesn't keep `electric-pair-mode' from balancing your ()'s and your
-;; []'s.
-(defun electric-pair--balance-info (direction string-or-comment)
- "Examine lists forward or backward according to DIRECTIONS's sign.
-
-STRING-OR-COMMENT is info suitable for running `parse-partial-sexp'.
-
-Return a cons of two descritions (MATCHED-P . PAIR) for the
-innermost and outermost lists that enclose point. The outermost
-list enclosing point is either the first top-level or first
-mismatched list found by uplisting.
-
-If the outermost list is matched, don't rely on its PAIR. If
-point is not enclosed by any lists, return ((T) (T))."
- (let* (innermost
- outermost
- (table (if string-or-comment
- electric-pair-text-syntax-table
- (syntax-table)))
- (at-top-level-or-equivalent-fn
- ;; called when `scan-sexps' ran perfectly, when when it
- ;; found a parenthesis pointing in the direction of
- ;; travel. Also when travel started inside a comment and
- ;; exited it
- #'(lambda ()
- (setq outermost (list t))
- (unless innermost
- (setq innermost (list t)))))
- (ended-prematurely-fn
- ;; called when `scan-sexps' crashed against a parenthesis
- ;; pointing opposite the direction of travel. After
- ;; traversing that character, the idea is to travel one sexp
- ;; in the opposite direction looking for a matching
- ;; delimiter.
- #'(lambda ()
- (let* ((pos (point))
- (matched
- (save-excursion
- (cond ((< direction 0)
- (condition-case nil
- (eq (char-after pos)
- (with-syntax-table table
- (matching-paren
- (char-before
- (scan-sexps (point) 1)))))
- (scan-error nil)))
- (t
- ;; In this case, no need to use
- ;; `scan-sexps', we can use some
- ;; `electric-pair--syntax-ppss' in this
- ;; case (which uses the quicker
- ;; `syntax-ppss' in some cases)
- (let* ((ppss (electric-pair--syntax-ppss
- (1- (point))))
- (start (car (last (nth 9 ppss))))
- (opener (char-after start)))
- (and start
- (eq (char-before pos)
- (or (with-syntax-table table
- (matching-paren opener))
- opener))))))))
- (actual-pair (if (> direction 0)
- (char-before (point))
- (char-after (point)))))
- (unless innermost
- (setq innermost (cons matched actual-pair)))
- (unless matched
- (setq outermost (cons matched actual-pair)))))))
- (save-excursion
- (while (not outermost)
- (condition-case err
- (with-syntax-table table
- (scan-sexps (point) (if (> direction 0)
- (point-max)
- (- (point-max))))
- (funcall at-top-level-or-equivalent-fn))
- (scan-error
- (cond ((or
- ;; some error happened and it is not of the "ended
- ;; prematurely" kind"...
- (not (string-match "ends prematurely" (nth 1 err)))
- ;; ... or we were in a comment and just came out of
- ;; it.
- (and string-or-comment
- (not (nth 8 (syntax-ppss)))))
- (funcall at-top-level-or-equivalent-fn))
- (t
- ;; exit the sexp
- (goto-char (nth 3 err))
- (funcall ended-prematurely-fn)))))))
- (cons innermost outermost)))
-
-(defun electric-pair--looking-at-unterminated-string-p (char)
- "Say if following string starts with CHAR and is unterminated."
- ;; FIXME: ugly/naive
- (save-excursion
- (skip-chars-forward (format "^%c" char))
- (while (not (zerop (% (save-excursion (skip-syntax-backward "\\")) 2)))
- (unless (eobp)
- (forward-char 1)
- (skip-chars-forward (format "^%c" char))))
- (and (not (eobp))
- (condition-case err
- (progn (forward-sexp) nil)
- (scan-error t)))))
-
-(defun electric-pair--inside-string-p (char)
- "Say if point is inside a string started by CHAR.
-
-A comments text is parsed with `electric-pair-text-syntax-table'.
-Also consider strings within comments, but not strings within
-strings."
- ;; FIXME: could also consider strings within strings by examining
- ;; delimiters.
- (let* ((ppss (electric-pair--syntax-ppss (point) '(comment))))
- (memq (nth 3 ppss) (list t char))))
-
-(defun electric-pair-inhibit-if-helps-balance (char)
- "Return non-nil if auto-pairing of CHAR would hurt parentheses' balance.
-
-Works by first removing the character from the buffer, then doing
-some list calculations, finally restoring the situation as if nothing
-happened."
- (pcase (electric-pair-syntax-info char)
- (`(,syntax ,pair ,_ ,s-or-c)
- (unwind-protect
- (progn
- (delete-char -1)
- (cond ((eq ?\( syntax)
- (let* ((pair-data
- (electric-pair--balance-info 1 s-or-c))
- (innermost (car pair-data))
- (outermost (cdr pair-data)))
- (cond ((car outermost)
- nil)
- (t
- (eq (cdr outermost) pair)))))
- ((eq syntax ?\")
- (electric-pair--looking-at-unterminated-string-p char))))
- (insert-char char)))))
-
-(defun electric-pair-skip-if-helps-balance (char)
- "Return non-nil if skipping CHAR would benefit parentheses' balance.
-
-Works by first removing the character from the buffer, then doing
-some list calculations, finally restoring the situation as if nothing
-happened."
- (pcase (electric-pair-syntax-info char)
- (`(,syntax ,pair ,_ ,s-or-c)
- (unwind-protect
- (progn
- (delete-char -1)
- (cond ((eq syntax ?\))
- (let* ((pair-data
- (electric-pair--balance-info
- -1 s-or-c))
- (innermost (car pair-data))
- (outermost (cdr pair-data)))
- (and
- (cond ((car outermost)
- (car innermost))
- ((car innermost)
- (not (eq (cdr outermost) pair)))))))
- ((eq syntax ?\")
- (electric-pair--inside-string-p char))))
- (insert-char char)))))
-
-(defun electric-pair-default-skip-self (char)
- (if electric-pair-preserve-balance
- (electric-pair-skip-if-helps-balance char)
- t))
-
-(defun electric-pair-default-inhibit (char)
- (if electric-pair-preserve-balance
- (electric-pair-inhibit-if-helps-balance char)
- (electric-pair-conservative-inhibit char)))
-
-(defun electric-pair-post-self-insert-function ()
- (let* ((pos (and electric-pair-mode (electric--after-char-pos)))
- (skip-whitespace-info))
- (pcase (electric-pair-syntax-info last-command-event)
- (`(,syntax ,pair ,unconditional ,_)
- (cond
- ((null pos) nil)
- ;; Wrap a pair around the active region.
- ;;
- ((and (memq syntax '(?\( ?\) ?\" ?\$)) (use-region-p))
- ;; FIXME: To do this right, we'd need a post-self-insert-function
- ;; so we could add-function around it and insert the closer after
- ;; all the rest of the hook has run.
- (if (or (eq syntax ?\")
- (and (eq syntax ?\))
- (>= (point) (mark)))
- (and (not (eq syntax ?\)))
- (>= (mark) (point))))
- (save-excursion
- (goto-char (mark))
- (electric-pair--insert pair))
- (delete-region pos (1- pos))
- (electric-pair--insert pair)
- (goto-char (mark))
- (electric-pair--insert last-command-event)))
- ;; Backslash-escaped: no pairing, no skipping.
- ((save-excursion
- (goto-char (1- pos))
- (not (zerop (% (skip-syntax-backward "\\") 2))))
- nil)
- ;; Skip self.
- ((and (memq syntax '(?\) ?\" ?\$))
- (and (or unconditional
- (if (functionp electric-pair-skip-self)
- (funcall electric-pair-skip-self last-command-event)
- electric-pair-skip-self))
- (save-excursion
- (when (setq skip-whitespace-info
- (if (functionp electric-pair-skip-whitespace)
- (funcall electric-pair-skip-whitespace)
- electric-pair-skip-whitespace))
- (electric-pair--skip-whitespace))
- (eq (char-after) last-command-event))))
- ;; This is too late: rather than insert&delete we'd want to only
- ;; skip (or insert in overwrite mode). The difference is in what
- ;; goes in the undo-log and in the intermediate state which might
- ;; be visible to other post-self-insert-hook. We'll just have to
- ;; live with it for now.
- (when skip-whitespace-info
- (electric-pair--skip-whitespace))
- (delete-region (1- pos) (if (eq skip-whitespace-info 'chomp)
- (point)
- pos))
- (forward-char))
- ;; Insert matching pair.
- ((and (memq syntax `(?\( ?\" ?\$))
- (not overwrite-mode)
- (or unconditional
- (not (funcall electric-pair-inhibit-predicate
- last-command-event))))
- (save-excursion (electric-pair--insert pair)))))
- (t
- (when (and (if (functionp electric-pair-open-newline-between-pairs)
- (funcall electric-pair-open-newline-between-pairs)
- electric-pair-open-newline-between-pairs)
- (eq last-command-event ?\n)
- (not (eobp))
- (eq (save-excursion
- (skip-chars-backward "\t\s")
- (char-before (1- (point))))
- (matching-paren (char-after))))
- (save-excursion (newline 1 t)))))))
-
-(put 'electric-pair-post-self-insert-function 'priority 20)
-
-(defun electric-pair-will-use-region ()
- (and (use-region-p)
- (memq (car (electric-pair-syntax-info last-command-event))
- '(?\( ?\) ?\" ?\$))))
-
-(defvar electric-pair-mode-map
- (let ((map (make-sparse-keymap)))
- (define-key map [remap backward-delete-char-untabify]
- 'electric-pair-backward-delete-char-untabify)
- (define-key map [remap backward-delete-char]
- 'electric-pair-backward-delete-char)
- (define-key map [remap delete-backward-char]
- 'electric-pair-backward-delete-char)
- map)
- "Keymap used by `electric-pair-mode'.")
-
-;;;###autoload
-(define-minor-mode electric-pair-mode
- "Toggle automatic parens pairing (Electric Pair mode).
-With a prefix argument ARG, enable Electric Pair mode if ARG is
-positive, and disable it otherwise. If called from Lisp, enable
-the mode if ARG is omitted or nil.
-
-Electric Pair mode is a global minor mode. When enabled, typing
-an open parenthesis automatically inserts the corresponding
-closing parenthesis. \(Likewise for brackets, etc.)."
- :global t :group 'electricity
- (if electric-pair-mode
- (progn
- (add-hook 'post-self-insert-hook
- #'electric-pair-post-self-insert-function)
- (electric--sort-post-self-insertion-hook)
- (add-hook 'self-insert-uses-region-functions
- #'electric-pair-will-use-region))
- (remove-hook 'post-self-insert-hook
- #'electric-pair-post-self-insert-function)
- (remove-hook 'self-insert-uses-region-functions
- #'electric-pair-will-use-region)))
-
;;; Electric newlines after/before/around some chars.
(defvar electric-layout-rules nil
HCoop / bpt / emacs.git / blobdiff