Make ‘electric-quote-mode’ not merge single quotes

[Andrea Greselin <greselin.andrea@gmail.com>]

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Hello everyone,

I stumbled a couple of times across a behaviour by
‘electric-quote-mode’ where it replaces two consecutive single
electric quotes with a single double quote. To see what I mean open
‘emacs -Q’, enable ‘electric-quote-mode’ and ‘text-mode’, then hit `
or ' twice. I find it more annoying than helpful so I changed
‘electric-quote-post-self-insert-function’ to make it check an option
that can disable this behaviour. It involves the two lines marked with
‘<--’ arrows in the code below.

Do you think it can be included in Emacs?

Best of wishes,
Andrea

Code:

    (defcustom electric-quote-replace-consecutive t
      "Non-nil means to replace two consecutive electric single quotes
    with the corresponding (opening or closing) double quote."
      :type 'boolean :safe #'booleanp :group 'electricity)

    (defun electric-quote-post-self-insert-function ()
      "Function that `electric-quote-mode' adds to `post-self-insert-hook'.
    This requotes when a quoting key is typed."
      (when (and electric-quote-mode
                 (or (eq last-command-event ?\')
                     (and (not electric-quote-context-sensitive)
                          (eq last-command-event ?\`))
                     (and electric-quote-replace-double
                          (eq last-command-event ?\")))
                 (not (run-hook-with-args-until-success
                       'electric-quote-inhibit-functions))
                 (if (derived-mode-p 'text-mode)
                     electric-quote-paragraph
                   (and comment-start comment-use-syntax
                        (or electric-quote-comment electric-quote-string)
                        (let* ((syntax (syntax-ppss))
                               (beg (nth 8 syntax)))
                          (and beg
                               (or (and electric-quote-comment (nth 4
syntax))
                                   (and electric-quote-string (nth 3
syntax)))
                               ;; Do not requote a quote that starts or ends
                               ;; a comment or string.
                               (eq beg (nth 8 (save-excursion
                                                (syntax-ppss (1-
(point)))))))))))
        (pcase electric-quote-chars
          (`(,q< ,q> ,q<< ,q>>)
           (save-excursion
             (let ((backtick ?\`))
               (if (or (eq last-command-event ?\`)
                       (and (or electric-quote-context-sensitive ;; <--
Changed here
                                (and electric-quote-replace-double
                                     (eq last-command-event ?\")))
                            (save-excursion
                              (backward-char)
                              (skip-syntax-backward "\\")
                              (or (bobp) (bolp)
                                  (memq (char-before) (list q< q<<))
                                  (memq (char-syntax (char-before))
                                        '(?\s ?\())))
                            (setq backtick ?\')))
                   (cond ((and electric-quote-replace-consecutive ;; <-----
and here
                               (search-backward (string q< backtick) (-
(point) 2) t))
                          (replace-match (string q<<))
                          (when (and electric-pair-mode
                                     (eq (cdr-safe
                                          (assq q<
electric-pair-text-pairs))
                                         (char-after)))
                            (delete-char 1))
                          (setq last-command-event q<<))
                         ((search-backward (string backtick) (1- (point)) t)
                          (replace-match (string q<))
                          (setq last-command-event q<))
                         ((search-backward "\"" (1- (point)) t)
                          (replace-match (string q<<))
                          (setq last-command-event q<<)))
                 (cond ((and electric-quote-replace-consecutive
                             (search-backward (string q> ?') (- (point) 2)
t))
                        (replace-match (string q>>))
                        (setq last-command-event q>>))
                       ((search-backward "'" (1- (point)) t)
                        (replace-match (string q>))
                        (setq last-command-event q>))
                       ((search-backward "\"" (1- (point)) t)
                        (replace-match (string q>>))
                        (setq last-command-event q>>))))))))))

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