In avoid.el handle case where posn-at-point returns nil.

* avoid.el (mouse-avoidance-point-position)
(mouse-avoidance-too-close-p): Handle case where posn-at-point
returns nil.

2 files changed, 23 insertions, 13 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index f99a4e8b1fb..c9cdc559a17 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2013-09-02  Martin Rudalics  <rudalics@gmx.at>
+
+        * avoid.el (mouse-avoidance-point-position)
+        (mouse-avoidance-too-close-p): Handle case where posn-at-point
+        returns nil.
+
 2013-09-02  Fabián Ezequiel Gallina  <fgallina@gnu.org>
 
         * progmodes/python.el (python-shell-completion-get-completions):
diff --git a/lisp/avoid.el b/lisp/avoid.el
index aaccd0974a4..72f90a30ff5 100644
--- a/lisp/avoid.el
+++ b/lisp/avoid.el
@@ -154,13 +154,15 @@ TOP-OR-BOTTOM-POS: Distance from top or bottom edge of frame or window."
 (defun mouse-avoidance-point-position ()
   "Return the position of point as (FRAME X . Y).
 Analogous to `mouse-position'."
-  (let ((edges (window-inside-edges))
-        (x-y (posn-x-y (posn-at-point))))
-    (cons (selected-frame)
-          (cons (+ (car edges)
-                   (/ (car x-y) (frame-char-width)))
-                (+ (car (cdr edges))
-                   (/ (cdr x-y) (frame-char-height)))))))
+  (let* ((edges (window-inside-edges))
+         (posn-at-point (posn-at-point))
+         (x-y (and posn-at-point (posn-x-y posn-at-point))))
+    (when x-y
+      (cons (selected-frame)
+            (cons (+ (car edges)
+                     (/ (car x-y) (frame-char-width)))
+                  (+ (car (cdr edges))
+                     (/ (cdr x-y) (frame-char-height))))))))
 
 ;(defun mouse-avoidance-point-position-test ()
 ;  (interactive)
@@ -185,19 +187,21 @@ MOUSE is the current mouse position as returned by `mouse-position'.
 Acceptable distance is defined by `mouse-avoidance-threshold'."
   (let* ((frame (car mouse))
          (mouse-y (cdr (cdr mouse)))
-         (tool-bar-lines (frame-parameter nil 'tool-bar-lines)))
+         (tool-bar-lines (frame-parameter nil 'tool-bar-lines))
+         point)
     (or tool-bar-lines
         (setq tool-bar-lines 0))
-    (if (and mouse-y (< mouse-y tool-bar-lines))
-        nil
-      (let ((point (mouse-avoidance-point-position))
-            (mouse-x (car (cdr mouse))))
+    (cond
+     ((and mouse-y (< mouse-y tool-bar-lines))
+      nil)
+     ((setq point (mouse-avoidance-point-position))
+      (let ((mouse-x (car (cdr mouse))))
         (and (eq frame (car point))
              (not (null mouse-x))
              (< (abs (- mouse-x (car (cdr point))))
                 mouse-avoidance-threshold)
              (< (abs (- mouse-y (cdr (cdr point))))
-                mouse-avoidance-threshold))))))
+                mouse-avoidance-threshold)))))))
 
 (defun mouse-avoidance-banish-destination ()
   "The position to which Mouse Avoidance mode `banish' moves the mouse.