-;; scroll-all.el -- scroll all buffers together minor mode
+;;; scroll-all.el --- scroll all buffers together minor mode
-;; Copyright (C) 1997 Free Software Foundation, Inc.
+;; Copyright (C) 1997, 2002, 2003, 2004, 2005,
+;; 2006 Free Software Foundation, Inc.
;; Author: Gary D. Foster <Gary.Foster@corp.sun.com>
;; Keywords: scroll crisp brief lock
;; 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, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
-;; Commentary
+;;; Commentary:
;; This mode allows multiple buffers to be 'locked' so that scrolling
;; up or down lines in any buffer causes all the buffers to mirror
;; the scrolling. It hooks into the post-command-hook to check for
;; Rick Macdonald <rickm@vsl.com>
;; Anders Lindgren <andersl@csd.uu.se>
-(defvar running-xemacs (string-match "XEmacs\\|Lucid" emacs-version))
-(defvar scroll-all-mode nil
- "Track status of scroll locking.")
-(if running-xemacs
- (add-minor-mode 'scroll-all-mode " *SL*")
- (or (assq 'scroll-all-mode-mode minor-mode-alist)
- (setq minor-mode-alist
- (cons '(scroll-all-mode-mode " *SL*") minor-mode-alist))))
+;;; Code:
-(defun scroll-all-scroll-down-all (arg)
- "Scroll down all visible windows."
- (interactive "P")
+(defun scroll-all-function-all (func arg)
+ "Apply function FUNC with argument ARG to all visible windows."
(let ((num-windows (count-windows))
(count 1))
- (if (> num-windows 1)
- ( progn (other-window 1)
- (while (< count num-windows)
- (if (not (eq (point) (point-max)))
- (progn (call-interactively 'next-line)))
- (other-window 1)
- (setq count (1+ count)))))))
+ (when (> num-windows 1)
+ (other-window 1)
+ (while (< count num-windows)
+ (condition-case nil
+ (funcall func arg)
+ ;; Ignore beginning- or end-of-buffer error in other windows.
+ (error nil)
+ )
+ (other-window 1)
+ (setq count (1+ count))))))
+
+(defun scroll-all-scroll-down-all (arg)
+ "Scroll down in all visible windows."
+ (interactive "p")
+ (scroll-all-function-all 'next-line arg))
(defun scroll-all-scroll-up-all (arg)
- "Scroll up all visible windows."
- (interactive "P")
- (let ((num-windows (count-windows))
- (count 1))
- (if (> num-windows 1)
- ( progn (other-window 1)
- (while (< count num-windows)
- (if (not (eq (point) (point-min)))
- (progn (call-interactively 'previous-line)))
- (other-window 1)
- (setq count (1+ count)))))))
+ "Scroll up in all visible windows."
+ (interactive "p")
+ (scroll-all-function-all 'previous-line arg))
(defun scroll-all-page-down-all (arg)
"Page down in all visible windows."
(interactive "P")
- (let ((num-windows (count-windows))
- (count 1))
- (if (> num-windows 1)
- (progn (other-window 1)
- (while (< count num-windows)
- (call-interactively 'fkey-scroll-up)
- (other-window 1)
- (setq count (1+ count)))))))
+ (scroll-all-function-all 'scroll-up arg))
(defun scroll-all-page-up-all (arg)
"Page up in all visible windows."
(interactive "P")
- (let ((num-windows (count-windows))
- (count 1))
- (if (> num-windows 1)
- (progn (other-window 1)
- (while (< count num-windows)
- (call-interactively 'fkey-scroll-down)
- (other-window 1)
- (setq count (1+ count)))))))
+ (scroll-all-function-all 'scroll-down arg))
+
+(defun scroll-all-beginning-of-buffer-all (arg)
+ "Go to the beginning of the buffer in all visible windows."
+ (interactive "P")
+ (scroll-all-function-all 'beginning-of-buffer arg))
+
+(defun scroll-all-end-of-buffer-all (arg)
+ "Go to the end of the buffer in all visible windows."
+ (interactive "P")
+ (scroll-all-function-all 'end-of-buffer arg))
(defun scroll-all-check-to-scroll ()
- "Check `last-command' to see if a scroll was done."
- (if (eq this-command 'next-line)
- (call-interactively 'scroll-all-scroll-down-all))
- (if (eq this-command 'previous-line)
- (call-interactively 'scroll-all-scroll-up-all))
- (if (eq this-command 'fkey-scroll-up)
- (call-interactively 'scroll-all-page-down-all))
- (if (eq this-command 'fkey-scroll-down)
- (call-interactively 'scroll-all-page-up-all)))
-
-
-(defun scroll-all-mode (arg)
- "Toggle Scroll-All minor mode."
- (interactive "P")
- (setq scroll-all-mode (not scroll-all-mode))
- (cond
- ((eq scroll-all-mode 't)
- (add-hook 'post-command-hook 'scroll-all-check-to-scroll))
- ((eq scroll-all-mode 'nil)
- (remove-hook 'post-command-hook 'scroll-all-check-to-scroll))))
+ "Check `this-command' to see if a scroll is to be done."
+ (cond ((eq this-command 'next-line)
+ (call-interactively 'scroll-all-scroll-down-all))
+ ((eq this-command 'previous-line)
+ (call-interactively 'scroll-all-scroll-up-all))
+ ((eq this-command 'scroll-up)
+ (call-interactively 'scroll-all-page-down-all))
+ ((eq this-command 'scroll-down)
+ (call-interactively 'scroll-all-page-up-all))
+ ((eq this-command 'beginning-of-buffer)
+ (call-interactively 'scroll-all-beginning-of-buffer-all))
+ ((eq this-command 'end-of-buffer)
+ (call-interactively 'scroll-all-end-of-buffer-all))))
+
+
+;;;###autoload
+(define-minor-mode scroll-all-mode
+ "Toggle Scroll-All minor mode.
+With ARG, turn Scroll-All minor mode on if ARG is positive, off otherwise.
+When Scroll-All mode is on, scrolling commands entered in one window
+apply to all visible windows in the same frame."
+ nil " *SL*" nil
+ :global t
+ :group 'windows
+ :group 'scrolling
+ (if scroll-all-mode
+ (add-hook 'post-command-hook 'scroll-all-check-to-scroll)
+ (remove-hook 'post-command-hook 'scroll-all-check-to-scroll)))
(provide 'scroll-all)
-;; scroll-all.el ends here
+;;; arch-tag: db20089a-b157-45df-b5d4-2430e60acdd8
+;;; scroll-all.el ends here