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+;; Spelling correction interface for Emacs.
+;; Copyright (C) 1985 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 1, or (at your option)
+;; any later version.
+
+;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+(defvar spell-command "spell"
+ "*Command to run the spell program.")
+
+(defvar spell-filter nil
+ "*Filter function to process text before passing it to spell program.
+This function might remove text-processor commands.
+nil means don't alter the text before checking it.")
+
+(defun spell-buffer ()
+ "Check spelling of every word in the buffer.
+For each incorrect word, you are asked for the correct spelling
+and then put into a query-replace to fix some or all occurrences.
+If you do not want to change a word, just give the same word
+as its \"correct\" spelling; then the query replace is skipped."
+ (interactive)
+ (spell-region (point-min) (point-max) "buffer"))
+
+(defun spell-word ()
+ "Check spelling of word at or before point.
+If it is not correct, ask user for the correct spelling
+and query-replace the entire buffer to substitute it."
+ (interactive)
+ (let (beg end spell-filter)
+ (save-excursion
+ (if (not (looking-at "\\<"))
+ (forward-word -1))
+ (setq beg (point))
+ (forward-word 1)
+ (setq end (point)))
+ (spell-region beg end (buffer-substring beg end))))
+
+(defun spell-region (start end &optional description)
+ "Like spell-buffer but applies only to region.
+Used in a program, applies from START to END.
+DESCRIPTION is an optional string naming the unit being checked:
+for example, \"word\"."
+ (interactive "r")
+ (let ((filter spell-filter)
+ (buf (get-buffer-create " *temp*")))
+ (save-excursion
+ (set-buffer buf)
+ (widen)
+ (erase-buffer))
+ (message "Checking spelling of %s..." (or description "region"))
+ (if (and (null filter) (= ?\n (char-after (1- end))))
+ (if (string= "spell" spell-command)
+ (call-process-region start end "spell" nil buf)
+ (call-process-region start end shell-file-name
+ nil buf nil "-c" spell-command))
+ (let ((oldbuf (current-buffer)))
+ (save-excursion
+ (set-buffer buf)
+ (insert-buffer-substring oldbuf start end)
+ (or (bolp) (insert ?\n))
+ (if filter (funcall filter))
+ (if (string= "spell" spell-command)
+ (call-process-region (point-min) (point-max) "spell" t buf)
+ (call-process-region (point-min) (point-max) shell-file-name
+ t buf nil "-c" spell-command)))))
+ (message "Checking spelling of %s...%s"
+ (or description "region")
+ (if (save-excursion
+ (set-buffer buf)
+ (> (buffer-size) 0))
+ "not correct"
+ "correct"))
+ (let (word newword
+ (case-fold-search t)
+ (case-replace t))
+ (while (save-excursion
+ (set-buffer buf)
+ (> (buffer-size) 0))
+ (save-excursion
+ (set-buffer buf)
+ (goto-char (point-min))
+ (setq word (downcase
+ (buffer-substring (point)
+ (progn (end-of-line) (point)))))
+ (forward-char 1)
+ (delete-region (point-min) (point))
+ (setq newword
+ (read-input (concat "`" word
+ "' not recognized; edit a replacement: ")
+ word))
+ (flush-lines (concat "^" (regexp-quote word) "$")))
+ (if (not (equal word newword))
+ (progn
+ (goto-char (point-min))
+ (query-replace-regexp (concat "\\b" (regexp-quote word) "\\b")
+ newword)))))))
+
+
+(defun spell-string (string)
+ "Check spelling of string supplied as argument."
+ (interactive "sSpell string: ")
+ (let ((buf (get-buffer-create " *temp*")))
+ (save-excursion
+ (set-buffer buf)
+ (widen)
+ (erase-buffer)
+ (insert string "\n")
+ (if (string= "spell" spell-command)
+ (call-process-region (point-min) (point-max) "spell"
+ t t)
+ (call-process-region (point-min) (point-max) shell-file-name
+ t t nil "-c" spell-command))
+ (if (= 0 (buffer-size))
+ (message "%s is correct" string)
+ (goto-char (point-min))
+ (while (search-forward "\n" nil t)
+ (replace-match " "))
+ (message "%sincorrect" (buffer-substring 1 (point-max)))))))