-;;; page.el --- page motion commands for emacs.
+;;; page.el --- page motion commands for Emacs
;; Copyright (C) 1985 Free Software Foundation, Inc.
;; Maintainer: FSF
+;; Keywords: wp convenience
;; This file is part of GNU Emacs.
;; 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.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; This code provides the page-oriented movement and selection commands
+;; documented in the Emacs manual.
;;; Code:
(goto-char (point-max)))
(setq count (1- count)))
(while (and (< count 0) (not (bobp)))
+ ;; In case the page-delimiter matches the null string,
+ ;; don't find a match without moving.
+ (and (save-excursion (re-search-backward page-delimiter nil t))
+ (= (match-end 0) (point))
+ (goto-char (match-beginning 0)))
(forward-char -1)
(if (re-search-backward page-delimiter nil t)
+ ;; We found one--move to the end of it.
(goto-char (match-end 0))
+ ;; We found nothing--go to beg of buffer.
(goto-char (point-min)))
(setq count (1+ count))))
(if (< arg 0)
(forward-page (1- arg))))
(forward-page)
- (push-mark nil t)
+ (push-mark nil t t)
(forward-page -1))
(defun narrow-to-page (&optional arg)
(if (> arg 0)
(forward-page arg)
(if (< arg 0)
- (forward-page (1- arg))))
+ (let ((adjust 0)
+ (opoint (point)))
+ ;; If we are not now at the beginning of a page,
+ ;; move back one extra time, to get to the start of this page.
+ (save-excursion
+ (beginning-of-line)
+ (or (and (looking-at page-delimiter)
+ (eq (match-end 0) opoint))
+ (setq adjust 1)))
+ (forward-page (- arg adjust)))))
;; Find the end of the page.
+ (set-match-data nil)
(forward-page)
;; If we stopped due to end of buffer, stay there.
;; If we stopped after a page delimiter, put end of restriction
;; at the beginning of that line.
- (if (save-excursion (beginning-of-line)
- (looking-at page-delimiter))
+ ;; Before checking the match that was found,
+ ;; verify that forward-page actually set the match data.
+ (if (and (match-beginning 0)
+ (save-excursion
+ (goto-char (match-beginning 0)) ; was (beginning-of-line)
+ (looking-at page-delimiter)))
(beginning-of-line))
(narrow-to-region (point)
(progn
(message "Page %d, line %d"
count
(1+ (count-lines (point) opoint)))))))
+\f
+;;; Place `provide' at end of file.
+(provide 'page)
;;; page.el ends here