xemacs-beta: lisp/modes/nroff-mode.el comparison

comparison lisp/modes/nroff-mode.el @ 0:376386a54a3c r19-14

Import from CVS: tag r19-14

author	cvs
date	Mon, 13 Aug 2007 08:45:50 +0200
parents
children	ac2d302a0011

comparison

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+:376386a54a3c
+;;; nroff-mode.el --- GNU Emacs major mode for editing nroff source
+;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
+;; Maintainer: FSF
+;; Keywords: wp
+;; This file is part of XEmacs.
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;; Commentary:
+;; This package is a major mode for editing nroff source code.  It knows
+;; about various nroff constructs, ms, mm, and me macros, and will fill
+;; and indent paragraphs properly in their presence.  It also includes
+;; a command to count text lines (excluding nroff constructs), a command
+;; to center a line, and movement commands that know how to skip macros.
+;;; Code:
+(defvar nroff-mode-abbrev-table nil
+"Abbrev table used while in nroff mode.")
+(defvar nroff-mode-map nil
+"Major mode keymap for nroff mode.")
+(if (not nroff-mode-map)
+(progn
+(setq nroff-mode-map (make-sparse-keymap))
+(define-key nroff-mode-map "\t"  'tab-to-tab-stop)
+(define-key nroff-mode-map "\es" 'center-line)
+(define-key nroff-mode-map "\e?" 'count-text-lines)
+(define-key nroff-mode-map "\n"  'electric-nroff-newline)
+(define-key nroff-mode-map "\en" 'forward-text-line)
+(define-key nroff-mode-map "\ep" 'backward-text-line)))
+;;;###autoload
+(defun nroff-mode ()
+"Major mode for editing text intended for nroff to format.
+\\{nroff-mode-map}
+Turning on Nroff mode runs `text-mode-hook', then `nroff-mode-hook'.
+Also, try `nroff-electric-mode', for automatically inserting
+closing requests for requests that are used in matched pairs."
+(interactive)
+(kill-all-local-variables)
+(use-local-map nroff-mode-map)
+(setq mode-name "Nroff")
+(setq major-mode 'nroff-mode)
+(set-syntax-table text-mode-syntax-table)
+(setq local-abbrev-table nroff-mode-abbrev-table)
+(make-local-variable 'nroff-electric-mode)
+(setq nroff-electric-mode nil)
+;; now define a bunch of variables for use by commands in this mode
+(make-local-variable 'page-delimiter)
+(setq page-delimiter "^\\.\\(bp\\|SK\\|OP\\)")
+(make-local-variable 'paragraph-start)
+(setq paragraph-start (concat "^[.']\\|" paragraph-start))
+(make-local-variable 'paragraph-separate)
+(setq paragraph-separate (concat "^[.']\\|" paragraph-separate))
+;; comment syntax added by mit-erl!gildea 18 Apr 86
+(make-local-variable 'comment-start)
+(setq comment-start "\\\" ")
+(make-local-variable 'comment-start-skip)
+(setq comment-start-skip "\\\\\"[ \t]*")
+(make-local-variable 'comment-column)
+(setq comment-column 24)
+(make-local-variable 'comment-indent-function)
+(setq comment-indent-function 'nroff-comment-indent)
+(run-hooks 'text-mode-hook 'nroff-mode-hook))
+;;; Compute how much to indent a comment in nroff/troff source.
+;;; By mit-erl!gildea April 86
+(defun nroff-comment-indent ()
+"Compute indent for an nroff/troff comment.
+Puts a full-stop before comments on a line by themselves."
+(let ((pt (point)))
+(unwind-protect
+	(progn
+	  (skip-chars-backward " \t")
+	  (if (bolp)
+	      (progn
+		(setq pt (1+ pt))
+		(insert ?.)
+		1)
+	    (if (save-excursion
+		  (backward-char 1)
+		  (looking-at "^[.']"))
+		1
+	      (max comment-column
+		   (* 8 (/ (+ (current-column)
+			      9) 8)))))) ; add 9 to ensure at least two blanks
+(goto-char pt))))
+(defun count-text-lines (start end &optional print)
+"Count lines in region, except for nroff request lines.
+All lines not starting with a period are counted up.
+Interactively, print result in echo area.
+Noninteractively, return number of non-request lines from START to END."
+(interactive "r\np")
+(if print
+(message "Region has %d text lines" (count-text-lines start end))
+(save-excursion
+(save-restriction
+	(narrow-to-region start end)
+	(goto-char (point-min))
+	(- (buffer-size) (forward-text-line (buffer-size)))))))
+(defun forward-text-line (&optional cnt)
+"Go forward one nroff text line, skipping lines of nroff requests.
+An argument is a repeat count; if negative, move backward."
+(interactive "p")
+(if (not cnt) (setq cnt 1))
+(while (and (> cnt 0) (not (eobp)))
+(forward-line 1)
+(while (and (not (eobp)) (looking-at "[.']."))
+(forward-line 1))
+(setq cnt (- cnt 1)))
+(while (and (< cnt 0) (not (bobp)))
+(forward-line -1)
+(while (and (not (bobp))
+		(looking-at "[.']."))
+(forward-line -1))
+(setq cnt (+ cnt 1)))
+cnt)
+(defun backward-text-line (&optional cnt)
+"Go backward one nroff text line, skipping lines of nroff requests.
+An argument is a repeat count; negative means move forward."
+(interactive "p")
+(forward-text-line (- cnt)))
+(defconst nroff-brace-table
+'((".(b" . ".)b")
+(".(l" . ".)l")
+(".(q" . ".)q")
+(".(c" . ".)c")
+(".(x" . ".)x")
+(".(z" . ".)z")
+(".(d" . ".)d")
+(".(f" . ".)f")
+(".LG" . ".NL")
+(".SM" . ".NL")
+(".LD" . ".DE")
+(".CD" . ".DE")
+(".BD" . ".DE")
+(".DS" . ".DE")
+(".DF" . ".DE")
+(".FS" . ".FE")
+(".KS" . ".KE")
+(".KF" . ".KE")
+(".LB" . ".LE")
+(".AL" . ".LE")
+(".BL" . ".LE")
+(".DL" . ".LE")
+(".ML" . ".LE")
+(".RL" . ".LE")
+(".VL" . ".LE")
+(".RS" . ".RE")
+(".TS" . ".TE")
+(".EQ" . ".EN")
+(".PS" . ".PE")
+(".BS" . ".BE")
+(".G1" . ".G2")			; grap
+(".na" . ".ad b")
+(".nf" . ".fi")
+(".de" . "..")))
+(defun electric-nroff-newline (arg)
+"Insert newline for nroff mode; special if electric-nroff mode.
+In `electric-nroff-mode', if ending a line containing an nroff opening request,
+automatically inserts the matching closing request after point."
+(interactive "P")
+(let ((completion (save-excursion
+		      (beginning-of-line)
+		      (and (null arg)
+			   nroff-electric-mode
+			   (<= (point) (- (point-max) 3))
+			   (cdr (assoc (buffer-substring (point)
+							 (+ 3 (point)))
+				       nroff-brace-table)))))
+	(needs-nl (not (looking-at "[ \t]*$"))))
+(if (null completion)
+	(newline (prefix-numeric-value arg))
+(save-excursion
+	(insert "\n\n" completion)
+	(if needs-nl (insert "\n")))
+(forward-char 1))))
+;;;###autoload
+(defun electric-nroff-mode (&optional arg)
+"Toggle `nroff-electric-newline' minor mode.
+`nroff-electric-newline' forces Emacs to check for an nroff request at the
+beginning of the line, and insert the matching closing request if necessary.
+This command toggles that mode (off->on, on->off), with an argument,
+turns it on iff arg is positive, otherwise off."
+(interactive "P")
+(or (eq major-mode 'nroff-mode) (error "Must be in nroff mode"))
+;; XEmacs: see below.
+;  (or (assq 'nroff-electric-mode minor-mode-alist)
+;      (setq minor-mode-alist (append minor-mode-alist
+;				     (list '(nroff-electric-mode
+;					     " Electric")))))
+(setq nroff-electric-mode
+	(cond ((null arg) (null nroff-electric-mode))
+	      (t (> (prefix-numeric-value arg) 0)))))
+;;;###autoload
+(defvar nroff-electric-mode nil
+"Non-nil if in electric-nroff minor mode.")
+;; XEmacs: do it right.  This must come after the defun of
+;; electric-nroff-mode so that add-minor-mode will recognize it as a
+;; command.
+;; perverse variable name.
+;;;###autoload
+(add-minor-mode 'nroff-electric-mode " Electric" nil nil 'electric-nroff-mode)
+;;; nroff-mode.el ends here

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comparison lisp/modes/nroff-mode.el @ 0:376386a54a3c r19-14