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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; A major mode for editing RELAX NG Compact syntax.
;; Version: 1.0b3
;; Date: 2002-12-05
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Copyright (c) 2002, Pantor Engineering AB
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or
;; without modification, are permitted provided that the following
;; conditions are met:
;;
;; * Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;;
;; * Redistributions in binary form must reproduce the above
;; copyright notice, this list of conditions and the following
;; disclaimer in the documentation and/or other materials provided
;; with the distribution.
;;
;; * Neither the name of Pantor Engineering AB nor the names of its
;; contributors may be used to endorse or promote products derived
;; from this software without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
;; CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
;; INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
;; MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
;; BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
;; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
;; ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
;; OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
;; POSSIBILITY OF SUCH DAMAGE.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Created by David.Rosenborg@pantor.com
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Example setup for your ~/.emacs file:
;;
;; (autoload 'rnc-mode "rnc-mode")
;; (setq auto-mode-alist
;; (cons '("\\.rnc\\'" . rnc-mode) auto-mode-alist))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Changes since 1.0b:
;; Added a couple of defvars for faces to handle differences
;; between GNU Emacs and XEmacs.
;;
;; 2008-12-28: Changed forward-char-command => forward-char
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'font-lock)
(defvar rnc-indent-level 3 "The RNC indentation level.")
(defvar rnc-keywords
(mapcar (lambda (kw) (concat "\\b" kw "\\b"))
'("attribute" "div" "element"
"empty" "external" "grammar" "include" "inherit" "list"
"mixed" "notAllowed" "parent" "start" "string"
"text" "token"))
"RNC keywords")
(defvar rnc-atoms
(mapcar (lambda (kw) (concat "\\b" kw "\\b"))
'("empty" "notAllowed" "string" "text" "token"))
"RNC atomic pattern keywords")
(defun rnc-make-regexp-choice (operands)
"(op1 op2 ...) -> \"\\(op1\\|op2\\|...\\)\""
(let ((result "\\("))
(mapc (lambda (op) (setq result (concat result op "\\|"))) operands)
(concat (substring result 0 -2) "\\)")))
;; Font lock treats face names differently in GNU Emacs and XEmacs
;; The following defvars is a workaround
(defvar italic 'italic)
(defvar default 'default)
(defvar font-lock-preprocessor-face 'font-lock-preprocessor-face)
(defvar rnc-font-lock-keywords
(list
'("\\b\\(attribute\\|element\\)\\b\\([^{]+\\){" 2
font-lock-variable-name-face)
'("[a-zA-Z][-a-zA-Z0-9._]*:[a-zA-Z][-a-zA-Z0-9._]*" . italic)
'("\\b\\(default\\(\\s +namespace\\)?\\|namespace\\|datatypes\\)\\(\\s +[a-zA-Z][-a-zA-Z0-9._]*\\)?\\s *=" 1 font-lock-preprocessor-face)
'("\\([a-zA-Z][-a-zA-Z0-9._]*\\)\\(\\s \\|\n\\)*[|&]?=" 1
font-lock-function-name-face)
'("[a-zA-Z][a-zA-Z0-9._]*\\(-[a-zA-Z][a-zA-Z0-9._]*\\)+" . default)
(cons (rnc-make-regexp-choice rnc-atoms) 'italic)
(cons (rnc-make-regexp-choice rnc-keywords) font-lock-keyword-face)
)
"RNC Highlighting")
(defun rnc-find-column (first start)
"Find which column to indent to."
;; FIXME: backward-sexp doesn't work with unbalanced braces in comments
(let* (column
pos
;; Find start of enclosing block or assignment
(token
(if (member first '("]" "}" ")"))
(progn
(goto-char (+ start 1))
(backward-sexp)
(beginning-of-line)
(re-search-forward "\\S ")
(setq pos (point))
(setq column (- (current-column) 1))
'lpar)
(catch 'done
(while (setq pos (re-search-backward "[{}()=]\\|\\[\\|\\]"
(point-min) t))
(let ((c (match-string 0)))
(beginning-of-line)
(re-search-forward "\\S ")
(setq column (- (current-column) 1))
(beginning-of-line)
(cond
;; Don't match inside comments
;; FIXME: Should exclude matches inside string literals too
((re-search-forward "#" pos t) (beginning-of-line))
;; Skip block
((member c '("]" "}" ")"))
(goto-char (+ pos 1))
(backward-sexp))
((string= c "=") (throw 'done 'eq))
(t (throw 'done 'lpar)))))))))
(cond
((not pos) 0)
((member first '("]" "}" ")")) column)
((member first '("{" "(")) (+ column rnc-indent-level))
;; Give lines starting with an operator a small negative indent.
;; This allows for the following indentation style:
;; foo =
;; bar
;; | baz
;; | oof
((member first '("," "&" "|")) (+ column (- rnc-indent-level 2)))
;; Check if first preceding non-whitespace character was an operator
;; If not, this is most likely a new assignment.
;; FIXME: This doesn't play well with name classes starting on a new
;; line
((eq token 'eq)
(goto-char start)
(if (and (re-search-backward "[^ \t\n]" (point-min) t)
(member (match-string 0) '("&" "|" "," "=" "~")))
(+ column rnc-indent-level)
column))
(t (+ column rnc-indent-level)))))
(defun rnc-indent-line ()
"Indents the current line."
(interactive)
(let ((orig-point (point)))
(beginning-of-line)
(let* ((beg-of-line (point))
(pos (re-search-forward "\\(\\S \\|\n\\)" (point-max) t))
(first (match-string 0))
(start (match-beginning 0))
(col (- (current-column) 1)))
(goto-char beg-of-line)
(let ((indent-column (rnc-find-column first start)))
(goto-char beg-of-line)
(cond
;; Only modify buffer if the line must be reindented
((not (= col indent-column))
(if (not (or (null pos)
(= beg-of-line start)))
(kill-region beg-of-line start))
(goto-char beg-of-line)
(while (< 0 indent-column)
(insert " ")
(setq indent-column (- indent-column 1))))
((< orig-point start) (goto-char start))
(t (goto-char orig-point)))))))
(defun rnc-electric-brace (arg)
(interactive "*P")
(self-insert-command (prefix-numeric-value arg))
(rnc-indent-line)
(let ((p (point)))
(when (save-excursion
(beginning-of-line)
(let ((pos (re-search-forward "\\S " (point-max) t)))
(and pos (= (- pos 1) p))))
(forward-char))))
(defvar rnc-mode-map () "Keymap used in RNC mode.")
(when (not rnc-mode-map)
(setq rnc-mode-map (make-sparse-keymap))
(define-key rnc-mode-map "\C-c\C-c" 'comment-region)
(define-key rnc-mode-map "}" 'rnc-electric-brace)
(define-key rnc-mode-map "{" 'rnc-electric-brace)
(define-key rnc-mode-map "]" 'rnc-electric-brace)
(define-key rnc-mode-map "[" 'rnc-electric-brace))
;;;###autoload
(defun rnc-mode ()
"Major mode for editing RELAX NG Compact Syntax schemas.
\\{rnc-mode-map}"
(interactive)
(kill-all-local-variables)
(make-local-variable 'indent-line-function)
(setq indent-line-function 'rnc-indent-line)
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(rnc-font-lock-keywords nil t nil nil))
(use-local-map rnc-mode-map)
(make-local-variable 'comment-start)
(make-local-variable 'comment-end)
(make-local-variable 'comment-start-skip)
(setq comment-start "#"
comment-end ""
comment-start-skip "\\([ \n\t]+\\)##?[ \n\t]+")
(let ((rnc-syntax-table (copy-syntax-table)))
(modify-syntax-entry ?# "< " rnc-syntax-table)
(modify-syntax-entry ?\n "> " rnc-syntax-table)
(modify-syntax-entry ?\^m "> " rnc-syntax-table)
(modify-syntax-entry ?\\ "w " rnc-syntax-table)
(modify-syntax-entry ?' "\" " rnc-syntax-table)
(modify-syntax-entry ?. "w " rnc-syntax-table)
(modify-syntax-entry ?- "w " rnc-syntax-table)
(modify-syntax-entry ?_ "w " rnc-syntax-table)
(set-syntax-table rnc-syntax-table))
(setq mode-name "RNC"
major-mode 'rnc-mode)
(run-hooks 'rnc-mode-hook))
(provide 'rnc-mode)
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