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Diffstat (limited to 'sample/ruby-mode.el')
| -rw-r--r-- | sample/ruby-mode.el | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/sample/ruby-mode.el b/sample/ruby-mode.el new file mode 100644 index 0000000000..96915bdc5a --- /dev/null +++ b/sample/ruby-mode.el @@ -0,0 +1,296 @@ +;;; +;;; ruby-mode.el - +;;; +;;; $Author$ +;;; $Revision$ +;;; $Date$ +;;; created at: Fri Feb 4 14:49:13 JST 1994 +;;; + +(defconst ruby-block-beg-re + "class\\|module\\|def\\|if\\|case\\|while\\|do\\|for\\|protect" + ) + +(defconst ruby-block-mid-re + "else\\|elsif\\|when\\|using\\|resque\\|ensure" + ) + +(defconst ruby-block-end-re + (concat "\\(end\\([ \t]+\\(" ruby-block-beg-re "\\)\\)?\\)") + ) + +(defconst ruby-delimiter + (concat "(\\|)\\|\\{\\|\\}\\|\"\\|\'\\|\\b\\(" ruby-block-beg-re "\\|" ruby-block-end-re "\\)\\b\\|#") + ) +(defconst ruby-negative + (concat "^[ \t]*\\b\\(\\(" ruby-block-mid-re "\\)\\|\\(" ruby-block-end-re "\\)\\)\\b") + ) + +(defvar ruby-mode-abbrev-table nil + "Abbrev table in use in ruby-mode buffers.") + +(define-abbrev-table 'ruby-mode-abbrev-table ()) + +(defvar ruby-mode-map nil "Keymap used in ruby mode.") + +(if ruby-mode-map + nil + (setq ruby-mode-map (make-sparse-keymap)) + (define-key ruby-mode-map "\e\C-a" 'ruby-beginning-of-defun) + (define-key ruby-mode-map "\e\C-e" 'ruby-end-of-defun) + (define-key ruby-mode-map "\t" 'ruby-indent-command) + (define-key ruby-mode-map "\t" 'ruby-indent-command) + (define-key ruby-mode-map "\C-m" 'ruby-reindent-then-newline-and-indent) + (define-key ruby-mode-map "\C-j" 'newline)) + +(defvar ruby-mode-syntax-table nil + "Syntax table in use in ruby-mode buffers.") + +(if ruby-mode-syntax-table + () + (setq ruby-mode-syntax-table (make-syntax-table)) + (modify-syntax-entry ?\' "\"" ruby-mode-syntax-table) + (modify-syntax-entry ?\" "\"" ruby-mode-syntax-table) + (modify-syntax-entry ?\n "> " ruby-mode-syntax-table) + (modify-syntax-entry ?\f "> " ruby-mode-syntax-table) + (modify-syntax-entry ?# "< " ruby-mode-syntax-table) + (modify-syntax-entry ?_ "w" ruby-mode-syntax-table) + (modify-syntax-entry ?< "." ruby-mode-syntax-table) + (modify-syntax-entry ?> "." ruby-mode-syntax-table) + (modify-syntax-entry ?& "." ruby-mode-syntax-table) + (modify-syntax-entry ?| "." ruby-mode-syntax-table) + (modify-syntax-entry ?$ "." ruby-mode-syntax-table) + (modify-syntax-entry ?% "." ruby-mode-syntax-table) + (modify-syntax-entry ?= "." ruby-mode-syntax-table) + (modify-syntax-entry ?/ "." ruby-mode-syntax-table) + (modify-syntax-entry ?+ "." ruby-mode-syntax-table) + (modify-syntax-entry ?* "." ruby-mode-syntax-table) + (modify-syntax-entry ?- "." ruby-mode-syntax-table) + (modify-syntax-entry ?\; "." ruby-mode-syntax-table) + (modify-syntax-entry ?\( "()" ruby-mode-syntax-table) + (modify-syntax-entry ?) ")(" ruby-mode-syntax-table) + (modify-syntax-entry ?{ "(}" ruby-mode-syntax-table) + (modify-syntax-entry ?} "){" ruby-mode-syntax-table) + (modify-syntax-entry ?\[ "(]" ruby-mode-syntax-table) + (modify-syntax-entry ?\] ")[" ruby-mode-syntax-table) + ) + +(defvar ruby-indent-level 2 + "*Indentation of ruby statements.") + +(defun ruby-mode-variables () + (setq local-abbrev-table ruby-mode-abbrev-table) + (make-local-variable 'indent-line-function) + (setq indent-line-function 'ruby-indent-line) + (make-local-variable 'require-final-newline) + (setq require-final-newline t) + (make-variable-buffer-local 'comment-start) + (setq comment-start "# ") + (make-variable-buffer-local 'comment-end) + (setq comment-end "") + (make-variable-buffer-local 'comment-column) + (setq comment-column 32) + (make-variable-buffer-local 'comment-start-skip) + (setq comment-start-skip "#+ *") + (make-local-variable 'parse-sexp-ignore-comments) + (setq parse-sexp-ignore-comments t)) + +(defun ruby-mode () + "Major mode for editing ruby scripts. +\\[ruby-indent-command] properly indents subexpressions of multi-line +class, module, def, if, while, for, do, and case statements, taking +nesting into account. + +The variable ruby-indent-level controls the amount of indentation. +\\{ruby-mode-map}" + (interactive) + (kill-all-local-variables) + (use-local-map ruby-mode-map) + (setq mode-name "ruby") + (setq major-mode 'ruby-mode) + (set-syntax-table ruby-mode-syntax-table) + (ruby-mode-variables) + (run-hooks 'ruby-mode-hook)) + +(defun ruby-current-indentation () + (save-excursion + (beginning-of-line) + (back-to-indentation) + (current-column))) + +(defun ruby-delete-indentation () + (let + ((b nil) + (m nil)) + (save-excursion + (beginning-of-line) + (setq b (point)) + (back-to-indentation) + (setq m (point))) + (delete-region b m))) + +(defun ruby-indent-line (&optional flag) + "Correct indentation of the current ruby line." + (let + ((x (ruby-calculate-indent))) + (ruby-indent-to x))) + +(defun ruby-indent-command () + (interactive) + (ruby-indent-line t)) + +(defun ruby-indent-to (x) + (let ((p nil) beg end) + (if (null x) + nil + (setq p (- (current-column) (ruby-current-indentation))) + (ruby-delete-indentation) + (beginning-of-line) + (save-excursion + (setq beg (point)) + (forward-line 1) + (setq end (point))) + (indent-to x) + (if (> p 0) (forward-char p))))) + +(defun ruby-parse-region (start end) + (let ((indent-point end) + (indent 0) + (in-string nil) + (in-paren nil) + (depth 0) + (nest nil)) + (save-excursion + (if start + (goto-char start) + (ruby-beginning-of-defun)) + (while (and (> indent-point (point)) + (re-search-forward ruby-delimiter indent-point t)) + (let ((w (buffer-substring (match-beginning 0) (match-end 0)))) + (cond + ((or (string= "\"" w) ;skip string + (string= "\'" w)) + (if (search-forward w indent-point t) + nil + (goto-char indent-point) + (setq in-string t))) + ((string= "#" w) ;skip comment + (forward-line 1)) + ((string= "(" w) ;skip to matching paren + (let ((orig depth)) + (setq nest (cons (point) nest)) + (setq depth (1+ depth)) + (while (and (/= depth orig) + (re-search-forward "[()]" indent-point t)) + (cond + ((= (char-after (match-beginning 0)) ?\( ) + (setq nest (cons (point) nest)) + (setq depth (1+ depth))) + (t + (setq nest (cdr nest)) + (setq depth (1- depth))))) + (if (> depth orig) (setq in-paren t)))) + ((string= "{" w) ;skip to matching paren + (let ((orig depth)) + (setq nest (cons (point) nest)) + (setq depth (1+ depth)) + (while (and (/= depth orig) + (re-search-forward "[{}]" indent-point t)) + (cond + ((= (char-after (match-beginning 0)) ?\{ ) + (setq nest (cons (point) nest)) + (setq depth (1+ depth))) + (t + (setq nest (cdr nest)) + (setq depth (1- depth))))) + (if (> depth orig) (setq in-paren t)))) + ((string-match "^end" w) + (setq nest (cdr nest)) + (setq depth (1- depth))) + ((string-match ruby-block-beg-re w) + (setq nest (cons (point) nest)) + (setq depth (1+ depth))) + (t + (error (format "bad string %s" w))))))) + (if in-paren (message "in-paren")) + (list in-string in-paren (car nest) depth))) + +(defun ruby-calculate-indent (&optional parse-start) + (save-excursion + (beginning-of-line) + (let ((indent-point (point)) + (case-fold-search nil) + state eol + (indent 0)) + (if parse-start + (goto-char parse-start) + (beginning-of-defun) + (setq parse-start (point))) + (setq state (ruby-parse-region parse-start indent-point)) + (cond + ((nth 0 state) ; within string + (setq indent nil)) ; do nothing + + ((nth 1 state) ; in paren + (goto-char (nth 2 state)) + (setq indent + (if (looking-at "$") + (+ (current-indentation) ruby-indent-level) + (current-column)))) + + ((> (nth 3 state) 0) ; in nest + (goto-char (nth 2 state)) + (forward-word -1) ; skip back a keyword + (setq indent (+ (current-column) ruby-indent-level))) + + (t ; toplevel + (setq indent 0))) + (goto-char indent-point) + (end-of-line) + (setq eol (point)) + (beginning-of-line) + (if (re-search-forward ruby-negative eol t) + (setq indent (- indent ruby-indent-level))) + indent))) + +(defun ruby-beginning-of-defun (&optional arg) + "Move backward to next beginning-of-defun. +With argument, do this that many times. +Returns t unless search stops due to end of buffer." + (interactive "p") + (and (re-search-backward (concat "^\\(" ruby-block-beg-re "\\)") + nil 'move (or arg 1)) + (progn (beginning-of-line) t))) + +(defun ruby-end-of-defun (&optional arg) + "Move forward to next end of defun. +An end of a defun is found by moving forward from the beginning of one." + (interactive "p") + (and (re-search-forward (concat "^\\(" ruby-block-end-re "\\)") + nil 'move (or arg 1)) + (progn (beginning-of-line) t)) + (forward-line 1)) + +(defun ruby-reindent-then-newline-and-indent () + (interactive "*") + (save-excursion + (delete-region (point) (progn (skip-chars-backward " \t") (point)))) + (insert ?\n) + (save-excursion + (forward-line -1) + (indent-according-to-mode)) + (indent-according-to-mode)) + +(defun ruby-encomment-region (beg end) + (interactive "r") + (save-excursion + (goto-char beg) + (while (re-search-forward "^" end t) + (replace-match "#" nil nil)))) + +(defun ruby-decomment-region (beg end) + (interactive "r") + (save-excursion + (goto-char beg) + (while (re-search-forward "^\\([ \t]*\\)#" end t) + (replace-match "\\1" nil nil)))) |