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;;; ruby-additional.el --- ruby-mode extensions yet to be merged into Emacs
;; Authors: Yukihiro Matsumoto, Nobuyoshi Nakada, Akinori MUSHA
;; URL: http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/misc/
;; Created: 3 Sep 2012
;; Package-Requires: ((emacs "24.3") (ruby-mode "1.2"))
;; Keywords: ruby, languages
;;; Commentary:
;;
;; This package contains ruby-mode extensions yet to be merged into
;; the latest released version of Emacs distribution. For older
;; versions of Emacs, use ruby-mode.el bundled with CRuby.
;;; Code:
(eval-when-compile
(require 'ruby-mode))
(eval-after-load 'ruby-mode
'(progn
(define-key ruby-mode-map "\C-c\C-e" 'ruby-insert-end)
(defun ruby-insert-end ()
(interactive)
(if (eq (char-syntax (preceding-char)) ?w)
(insert " "))
(insert "end")
(save-excursion
(if (eq (char-syntax (following-char)) ?w)
(insert " "))
(ruby-indent-line t)
(end-of-line)))
(defconst ruby-default-encoding-map
'((us-ascii . nil) ;; Do not put coding: us-ascii
(utf-8 . nil) ;; Do not put coding: utf-8
(shift-jis . cp932) ;; Emacs charset name of Shift_JIS
(shift_jis . cp932) ;; MIME charset name of Shift_JIS
(japanese-cp932 . cp932)) ;; Emacs charset name of CP932
)
(custom-set-default 'ruby-encoding-map ruby-default-encoding-map)
(defcustom ruby-encoding-map ruby-default-encoding-map
"Alist to map encoding name from Emacs to Ruby.
Associating an encoding name with nil means it needs not be
explicitly declared in magic comment."
:type '(repeat (cons (symbol :tag "From") (symbol :tag "To")))
:group 'ruby)
(defun ruby-mode-set-encoding ()
"Insert or update a magic comment header with the proper encoding.
`ruby-encoding-map' is looked up to convert an encoding name from
Emacs to Ruby."
(let* ((nonascii
(save-excursion
(widen)
(goto-char (point-min))
(re-search-forward "[^\0-\177]" nil t)))
(coding-system
(or coding-system-for-write
buffer-file-coding-system))
(coding-system
(and coding-system
(coding-system-change-eol-conversion coding-system nil)))
(coding-system
(and coding-system
(or
(coding-system-get coding-system :mime-charset)
(let ((coding-type (coding-system-get coding-system :coding-type)))
(cond ((eq coding-type 'undecided)
(if nonascii
(or (and (coding-system-get coding-system :prefer-utf-8)
'utf-8)
(coding-system-get default-buffer-file-coding-system :coding-type)
'ascii-8bit)))
((memq coding-type '(utf-8 shift-jis))
coding-type)
(t coding-system))))))
(coding-system
(or coding-system
'us-ascii))
(coding-system
(let ((cons (assq coding-system ruby-encoding-map)))
(if cons (cdr cons) coding-system)))
(coding-system
(and coding-system
(symbol-name coding-system))))
(if coding-system
(save-excursion
(widen)
(goto-char (point-min))
(if (looking-at "^#!") (beginning-of-line 2))
(cond ((looking-at "\\s *#.*-\*-\\s *\\(en\\)?coding\\s *:\\s *\\([-a-z0-9_]*\\)\\s *\\(;\\|-\*-\\)")
(unless (string= (match-string 2) coding-system)
(goto-char (match-beginning 2))
(delete-region (point) (match-end 2))
(and (looking-at "-\*-")
(let ((n (skip-chars-backward " ")))
(cond ((= n 0) (insert " ") (backward-char))
((= n -1) (insert " "))
((forward-char)))))
(insert coding-system)))
((looking-at "\\s *#.*coding\\s *[:=]"))
(t (when ruby-insert-encoding-magic-comment
(insert "# -*- coding: " coding-system " -*-\n"))))))))
))
(provide 'ruby-additional)
;;; ruby-additional.el ends here
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