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ruby-style.el
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ruby-style.el
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;;; -*- emacs-lisp -*-
;;;
;;; ruby-style.el -
;;;
;;; C/C++ mode style for Ruby.
;;;
;;; $Author$
;;; created at: Thu Apr 26 13:54:01 JST 2007
;;;
;;; Put this file under a directory contained in ``load-path'', and
;;; then load it.
;;; To switch to the "ruby" style automatically if it looks like a
;;; source file of ruby, add ruby-style-c-mode to c-mode-hook:
;;;
;;; (require 'ruby-style)
;;; (add-hook 'c-mode-hook 'ruby-style-c-mode)
;;; (add-hook 'c++-mode-hook 'ruby-style-c-mode)
;;;
;;; Customize the c-default-style variable to set the default style
;;; for each CC major mode.
(defconst ruby-style-revision "$Revision$"
"Ruby style revision string.")
(defconst ruby-style-version
(and
(string-match "[0-9.]+" ruby-style-revision)
(substring ruby-style-revision (match-beginning 0) (match-end 0)))
"Ruby style version number.")
(defun ruby-style-case-indent (x)
(save-excursion
(back-to-indentation)
(unless (progn (backward-up-list) (back-to-indentation)
(> (point) (cdr x)))
(goto-char (cdr x))
(if (looking-at "\\<case\\|default\\>") '*))))
(defun ruby-style-label-indent (x)
(save-excursion
(back-to-indentation)
(unless (progn (backward-up-list) (back-to-indentation)
(>= (point) (cdr x)))
(goto-char (cdr x))
(condition-case ()
(progn
(backward-up-list)
(backward-sexp 2)
(if (looking-at "\\<switch\\>") '/))
(error)))))
(require 'cc-styles)
(c-add-style
"ruby"
'("bsd"
(c-basic-offset . 4)
(tab-width . 8)
(indent-tabs-mode . t)
(setq show-trailing-whitespace t)
(c-offsets-alist
(case-label . *)
(label . (ruby-style-label-indent *))
(statement-case-intro . *)
(statement-case-open . *)
(statement-block-intro . (ruby-style-case-indent +))
(access-label /)
)))
;;;###autoload
(defun ruby-style-c-mode ()
(interactive)
(if (or (let ((name (buffer-file-name))) (and name (string-match "/ruby\\>" name)))
(save-excursion
(goto-char (point-min))
(let ((head (progn (forward-line 100) (point)))
(case-fold-search nil))
(goto-char (point-min))
(re-search-forward "Copyright (C) .* Yukihiro Matsumoto" head t))))
(c-set-style "ruby")))
(provide 'ruby-style)