(follow-unload-function): New function.

2 files changed, 37 insertions, 4 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d24869a65eb..9c399eb6de2 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,7 @@
 2007-10-19  Juanma Barranquero  <lekktu@gmail.com>
 
+        * follow.el (follow-unload-function): New function.
+
         * loadhist.el (unload-function-features-list):
         Rename from `unload-hook-features-list'.
         (unload-hook-features-list): Add as obsolete alias.
diff --git a/lisp/follow.el b/lisp/follow.el
index 55a331a22d3..50760cd9909 100644
--- a/lisp/follow.el
+++ b/lisp/follow.el
@@ -712,7 +712,7 @@ in your `~/.emacs' file:
 ;;}}}
 ;;{{{ Movement
 
-;; Note, these functions are not very useful, atleast not unless you
+;; Note, these functions are not very useful, at least not unless you
 ;; rebind the rather cumbersome key sequence `C-c . p'.
 
 (defun follow-next-window ()
@@ -1267,7 +1267,7 @@ position of the first window.  Otherwise it is a good guess."
     (let ((done nil)
           win-start
           res)
-      ;; Always calculate what happend when no line is displayed in the first
+      ;; Always calculate what happens when no line is displayed in the first
       ;; window. (The `previous' res is needed below!)
       (goto-char guess)
       (vertical-motion 0 (car windows))
@@ -1508,9 +1508,9 @@ non-first windows in Follow mode."
                     (setq win-start-end (follow-windows-start-end windows))
                     (follow-invalidate-cache)
                     ;; When the point ends up in another window. This
-                    ;; happends when dest is in the beginning of the
+                    ;; happens when dest is in the beginning of the
                     ;; file and the selected window is not the first.
-                    ;; It can also, in rare situations happend when
+                    ;; It can also, in rare situations happen when
                     ;; long lines are used and there is a big
                     ;; difference between the width of the windows.
                     ;; (When scrolling one line in a wide window which
@@ -2162,6 +2162,37 @@ This prevents `mouse-drag-region' from messing things up."
 
 ;;{{{ The end
 
+(defun follow-unload-function ()
+  (easy-menu-remove-item nil '("Tools") "Follow")
+  (follow-stop-intercept-process-output)
+  (dolist (group '((before
+                    ;; XEmacs
+                    isearch-done
+                    ;; both
+                    set-process-filter sit-for move-overlay)
+                   (after
+                    ;; Emacs
+                    scroll-bar-drag scroll-bar-drag-1 scroll-bar-scroll-down
+                    scroll-bar-scroll-up scroll-bar-set-window-start
+                    ;; XEmacs
+                    scrollbar-line-down scrollbar-line-up scrollbar-page-down
+                    scrollbar-page-up scrollbar-to-bottom scrollbar-to-top
+                    scrollbar-vertical-drag
+                    ;; both
+                    process-filter)))
+    (let ((class (car group)))
+      (dolist (fun (cdr group))
+        (when (functionp fun)
+          (condition-case nil
+              (progn
+                (ad-remove-advice fun class
+                                  (intern (concat "follow-" (symbol-name fun))))
+                (ad-update fun))
+            (error nil))))))
+  nil)
+
+(defvar follow-unload-function 'follow-unload-function)
+
 ;;
 ;; We're done!
 ;;