* lisp/mouse.el (popup-menu-normalize-position): New function.

(popup-menu): Use `popup-menu-normalize-position' to normalize
the form for POSITION argument.
* lisp/term/x-win.el (x-menu-bar-open):
Use the value returend from (posn-at-point) as position
passed to `popup-menu'.

lisp/ChangeLog

+2012-08-10  Masatake YAMATO  <yamato@redhat.com>
+
+	* mouse.el (popup-menu-normalize-position): New function.
+	(popup-menu): Use `popup-menu-normalize-position' to normalize
+	the form for POSITION argument.
+
+	* term/x-win.el (x-menu-bar-open):
+	Use the value returend from (posn-at-point) as position
+	passed to `popup-menu'.
+
 2012-08-09  Jay Belanger  <jay.p.belanger@gmail.com>
 
 	* calc/calccomp.el (math-compose-expr): Add extra argument
@@ -35,8 +45,8 @@
 	* progmodes/python.el: Enhancements to forward-sexp.
 	(python-nav-forward-sexp): Rename from
 	python-nav-forward-sexp-function.
-	(python-nav--forward-sexp, python-nav--backward-sexp): New
-	functions.
+	(python-nav--forward-sexp, python-nav--backward-sexp):
+	New functions.
 
 2012-08-09  Jay Belanger  <jay.p.belanger@gmail.com>
 
@@ -489,9 +499,8 @@
 
 	* register.el (copy-to-register, copy-rectangle-to-register):
 	Deactivate the mark, and use indicate-copied-region (Bug#10056).
-	(append-to-register, prepend-to-register): Call
-
-2012-07-29  Juri Linkov  <juri@jurta.org>
+	(append-to-register, prepend-to-register):
+	Call 2012-07-29  Juri Linkov  <juri@jurta.org>
 
 	* simple.el (async-shell-command-buffer): New defcustom.
 	(shell-command): Use it.  (Bug#4719)

lisp/mouse.el

@@ -101,11 +101,8 @@ point at the click position."
   "Popup the given menu and call the selected option.
 MENU can be a keymap, an easymenu-style menu or a list of keymaps as for
 `x-popup-menu'.
-
-POSITION can be a click event or ((XOFFSET YOFFSET) WINDOW) and
-defaults to the current mouse position.  If POSITION is the
-symbol `point', the current point position is used.
-
+The menu is shown at the place where POSITION specifies. About
+the form of POSITION, see `popup-menu-normalize-position'.
 PREFIX is the prefix argument (if any) to pass to the command."
   (let* ((map (cond
 	       ((keymapp menu) menu)
@@ -114,18 +111,8 @@ PREFIX is the prefix argument (if any) to pass to the command."
 			 (filter (when (symbolp map)
 				   (plist-get (get map 'menu-prop) :filter))))
 		    (if filter (funcall filter (symbol-function map)) map)))))
-	 event cmd)
-    (setq position
-	  (cond
-	   ((eq position 'point)
-	    (let* ((pp (posn-at-point))
-		   (xy (posn-x-y pp)))
-	      (list (list (car xy) (cdr xy)) (posn-window pp))))
-	   ((not position)
-	    (let ((mp (mouse-pixel-position)))
-	      (list (list (cadr mp) (cddr mp)) (car mp))))
-	   (t
-	    position)))
+	 event cmd
+	 (position (popup-menu-normalize-position position)))
     ;; The looping behavior was taken from lmenu's popup-menu-popup
     (while (and map (setq event
 			  ;; map could be a prefix key, in which case
@@ -163,6 +150,37 @@ PREFIX is the prefix argument (if any) to pass to the command."
       ;; mouse-major-mode-menu was using `command-execute' instead.
       (call-interactively cmd))))
 
+(defun popup-menu-normalize-position (position)
+  "Converts the POSITION to the form which `popup-menu' expects internally.
+POSITION can be nil, an click event, a posn- value, or a value having
+form ((XOFFSET YOFFSET) WINDOW).
+If nil, the current mouse position is used.
+If an click event, the value returend from `event-end' is used."
+  (pcase position
+    ;; nil -> mouse cursor position
+    ;; this pattern must be before `eventp' because
+    ;; nil is an event.
+    (`nil
+     (let ((mp (mouse-pixel-position)))
+       (list (list (cadr mp) (cddr mp)) (car mp))))
+    ;; value returned from (event-end (read-event)) or (posn-at-point)
+    ((or `(,window ,area-or-pos (,x . ,y)
+		   ,timestamp ,object ,pos (,col . ,row)
+		   ,image (,dx . ,dy) (,width . ,height))
+	 `(,window ,pos (0 . 0) 0))
+     (let ((xy (posn-x-y position)))
+       (list (list (car xy) (cdr xy))
+	     (posn-window position))))
+    ;; pattern expected by popup-menu
+    (`((,xoffset ,yoffset) ,window)
+     position)
+    ;; event
+    ((pred eventp)
+     (popup-menu-normalize-position (event-end position)))
+    ;; rejects
+    (t
+     (error "Unexpected position form"))))
+
 (defun minor-mode-menu-from-indicator (indicator)
   "Show menu for minor mode specified by INDICATOR.
 Interactively, INDICATOR is read using completion.

lisp/term/x-win.el

@@ -1316,7 +1316,7 @@ Request data types in the order specified by `x-select-request-type'."
     (popup-menu (mouse-menu-bar-map)
 		(if (listp last-nonmenu-event)
 		    nil
-		  'point)))))
+		  (posn-at-point))))))
 
 
 ;;; Window system initialization.