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−;;; page.el --- page motion commands for Emacs
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−
+
−;; Copyright (C) 1985, 1997 Free Software Foundation, Inc.
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−
+
−;; Maintainer: FSF
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−;; Keywords: extensions, dumped
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−;; Keywords: wp convenience
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−
+
−;; This file is part of XEmacs.
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−
+
−;; 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
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−;; WITHOUT ANY WARRANTY; without even the implied warranty of
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−;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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−;; General Public License for more details.
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−
+
−;; 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
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−;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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−;; 02111-1307, USA.
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−
+
−;;; Synched up with: FSF 21.3.
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−
+
−;;; Commentary:
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−
+
−;; This file is dumped with XEmacs.
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−
+
−;; This code provides the page-oriented movement and selection commands
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−;; documented in the XEmacs Reference Manual.
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−
+
−;;; Code:
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−
+
−(defun forward-page (&optional count)
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−  "Move forward to page boundary.  With arg, repeat, or go back if negative.
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−A page boundary is any line whose beginning matches the regexp
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−`page-delimiter'."
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−  (interactive "_p") ; XEmacs
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−  (or count (setq count 1))
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−  (while (and (> count 0) (not (eobp)))
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−    ;; In case the page-delimiter matches the null string,
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−    ;; don't find a match without moving.
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−    (if (bolp) (forward-char 1))
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−    (if (re-search-forward page-delimiter nil t)
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−	nil
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−      (goto-char (point-max)))
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−    (setq count (1- count)))
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−  (while (and (< count 0) (not (bobp)))
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−    ;; In case the page-delimiter matches the null string,
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−    ;; don't find a match without moving.
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−    (and (save-excursion (re-search-backward page-delimiter nil t))
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−	 (= (match-end 0) (point))
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−	 (goto-char (match-beginning 0)))
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−    (backward-char 1)
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−    (if (re-search-backward page-delimiter nil t)
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−	;; We found one--move to the end of it.
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−	(goto-char (match-end 0))
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−      ;; We found nothing--go to beg of buffer.
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−      (goto-char (point-min)))
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−    (setq count (1+ count))))
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−
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−(defun backward-page (&optional count)
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−  "Move backward to page boundary.  With arg, repeat, or go fwd if negative.
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−A page boundary is any line whose beginning matches the regexp
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−`page-delimiter'."
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−  (interactive "_p") ; XEmacs
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−  (or count (setq count 1))
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−  (forward-page (- count)))
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−
+
−(defun mark-page (&optional arg)
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−  "Put mark at end of page, point at beginning.
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−A numeric arg specifies to move forward or backward by that many pages,
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−thus marking a page other than the one point was originally in."
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−  (interactive "P")
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−  (setq arg (if arg (prefix-numeric-value arg) 0))
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−  (if (> arg 0)
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−      (forward-page arg)
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−    (if (< arg 0)
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−        (forward-page (1- arg))))
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−  (forward-page)
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−  (push-mark nil t t)
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−  (forward-page -1))
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−
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−(defun narrow-to-page (&optional arg)
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−  "Make text outside current page invisible.
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−A numeric arg specifies to move forward or backward by that many pages,
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−thus showing a page other than the one point was originally in."
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−  (interactive "P")
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−  (setq arg (if arg (prefix-numeric-value arg) 0))
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−  (save-excursion
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−    (widen)
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−    (if (> arg 0)
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−	(forward-page arg)
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−      (if (< arg 0)
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−	  (let ((adjust 0)
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−		(opoint (point)))
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−	    ;; If we are not now at the beginning of a page,
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−	    ;; move back one extra time, to get to the start of this page.
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−	    (save-excursion
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−	      (beginning-of-line)
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−	      (or (and (looking-at page-delimiter)
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−		       (eq (match-end 0) opoint))
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−		  (setq adjust 1)))
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−	    (forward-page (- arg adjust)))))
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−    ;; Find the end of the page.
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−    (set-match-data nil)
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−    (forward-page)
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−    ;; If we stopped due to end of buffer, stay there.
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−    ;; If we stopped after a page delimiter, put end of restriction
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−    ;; at the beginning of that line.
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−    ;; Before checking the match that was found,
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−    ;; verify that forward-page actually set the match data.
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−    (if (and (match-beginning 0)
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−	     (save-excursion
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−	       (goto-char (match-beginning 0)) ; was (beginning-of-line)
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−	       (looking-at page-delimiter)))
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−	(beginning-of-line))
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−    (narrow-to-region (point)
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−		      (progn
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−			;; Find the top of the page.
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−			(forward-page -1)
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−			;; If we found beginning of buffer, stay there.
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−			;; If extra text follows page delimiter on same line,
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−			;; include it.
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−			;; Otherwise, show text starting with following line.
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−			(if (and (eolp) (not (bobp)))
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−			    (forward-line 1))
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−			(point)))))
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−(put 'narrow-to-page 'disabled t)
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−
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−(defun count-lines-page ()
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−  "Report number of lines on current page, and how many are before or after point."
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−  (interactive "_") ; XEmacs
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−  (save-excursion
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−    (let ((opoint (point)) beg end
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−	  total before after)
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−      (forward-page)
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−      (beginning-of-line)
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−      (or (looking-at page-delimiter)
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−	  (end-of-line))
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−      (setq end (point))
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−      (backward-page)
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−      (setq beg (point))
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−      (setq total (count-lines beg end)
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−	    before (count-lines beg opoint)
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−	    after (count-lines opoint end))
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−      (message "Page has %d lines (%d + %d)" total before after))))
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−
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−(defun what-page ()
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−  "Print page and line number of point."
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−  (interactive "_") ; XEmacs
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−  (save-restriction
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−    (widen)
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−    (save-excursion
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−      (beginning-of-line)
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−      (let ((count 1)
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−	    (opoint (point)))
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−	(goto-char 1)
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−	(while (re-search-forward page-delimiter opoint t)
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−	  (setq count (1+ count)))
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−	(message "Page %d, line %d"
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−		 count
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−		 (1+ (count-lines (point) opoint)))))))
+
−
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−;;; Place `provide' at end of file.
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−(provide 'page)
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−
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−;;; page.el ends here