more thorough job of deleting old overlays on startup

Before this patch, revert-buffer caused stale overlays to not get cleaned
up because it depended on visible-mark-overlays being valid.  However,
reverting the buffer wipes out local variables.

diff --git a/visible-mark.el b/visible-mark.el
index 8bc719a85fa22ed4e9a72778843c66ef5eee2b74..9318403e08d053db571c1aa3465840b2ddb31fe0 100644 (file)
--- a/visible-mark.el
+++ b/visible-mark.el
@@ -67,7 +67,11 @@
   :type '(repeat regexp))
                   
 (defun visible-mark-initialize-overlays ()
   :type '(repeat regexp))
                   
 (defun visible-mark-initialize-overlays ()

-  (mapc 'delete-overlay visible-mark-overlays)
+  (mapc
+   (lambda (x)
+     (when (eq 'visible-mark (overlay-get x 'category))
+       (delete-overlay x)))
+   (overlays-in (point-min) (point-max)))  

   (let (overlays)
     (dotimes (i visible-mark-max)
       (let ((overlay (make-overlay (point-min) (point-min))))
   (let (overlays)
     (dotimes (i visible-mark-max)
       (let ((overlay (make-overlay (point-min) (point-min))))