cocoa: fix startup -psn_ and file handling

original commit: a7426c1c2744dc71a8738e3c20bafcc8c0b2d115

collects/mred/private/app.rkt

@@ -1,6 +1,6 @@
-(module app mzscheme
-  (require mzlib/class
-	   (prefix wx: "kernel.ss")
+(module app racket/base
+  (require racket/class
+	   (prefix-in wx: "kernel.ss")
 	   "lock.ss"
 	   "helper.ss"
 	   "wx.ss"
@@ -50,7 +50,7 @@
 			       (set! running-quit? #f)))))))))))])
     (wx:application-quit-handler (make-app-handler f f)))
 
-  (define (set-handler! who proc param arity result-filter)
+  (define (set-handler! who proc param arity result-filter post-set)
     (when proc
       (unless (and (procedure? proc)
 		   (procedure-arity-includes? proc arity))
@@ -59,13 +59,14 @@
 			  proc)))
     (let ([e (wx:current-eventspace)])
       (when (wx:main-eventspace? e)
-	(param (make-app-handler
+        (param (make-app-handler
 		(lambda args
 		  (parameterize ([wx:current-eventspace e])
 		    (wx:queue-callback
 		     (lambda () (result-filter (apply proc args)))
 		     wx:middle-queue-key)))
-		proc)))))
+		proc))
+        (post-set))))
 
   (define application-preferences-handler
     (case-lambda
@@ -75,7 +76,8 @@
       (set-handler! 'application-preferences-handler proc
 		    wx:application-pref-handler
 		    0
-		    values)]))
+		    values
+                    void)]))
 
   (define application-about-handler
     (case-lambda
@@ -86,7 +88,8 @@
       (set-handler! 'application-about-handler proc
 		    wx:application-about-handler
 		    0
-		    values)]))
+		    values
+                    void)]))
 
   (define application-quit-handler
     (case-lambda
@@ -97,18 +100,33 @@
       (set-handler! 'application-quit-handler proc
 		    wx:application-quit-handler
 		    0
-		    (lambda (v) (unless v (wx:cancel-quit)) v))]))
+		    (lambda (v) (unless v (wx:cancel-quit)) v)
+                    void)]))
+
+  (define saved-files null)
 
   (define default-application-file-handler
     (entry-point
      (lambda (f)
        (let ([af (weak-box-value active-main-frame)])
-	 (when af
-	   (queue-window-callback
-	    af
-	    (entry-point
-	     (lambda () (when (send af accept-drag?)
-			      (send af on-drop-file f))))))))))
+	 (if af
+             (queue-window-callback
+              af
+              (entry-point
+               (lambda () (if (send af accept-drag?)
+                              (send af on-drop-file f)
+                              (set! saved-files (cons f saved-files))))))
+             (set! saved-files (cons f saved-files)))))))
+
+  (define (requeue-saved-files)
+    (as-entry
+     (lambda ()
+       (for-each (lambda (f)
+                   (wx:queue-callback (lambda ()
+                                        ((wx:application-file-handler) f))
+                                      wx:middle-queue-key))
+                 (reverse saved-files))
+       (set! saved-files null))))
 
   (define (install-defh)
     (wx:application-file-handler (make-app-handler
@@ -129,7 +147,8 @@
 	  (set-handler! 'application-file-handler proc
 			wx:application-file-handler
 			1
-			values))]))
+			values
+                        requeue-saved-files))]))
 
 
   (define (current-eventspace-has-standard-menus?)

collects/mred/private/wx/common/handlers.rkt

@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 
 (provide application-file-handler
          application-quit-handler
@@ -7,10 +7,16 @@
 
          nothing-application-pref-handler)
 
-(define afh void)
+(define saved-files null)
+(define afh (lambda (f)
+              (set! saved-files (cons f saved-files))))
 (define application-file-handler
   (case-lambda
-   [(proc) (set! afh proc)]
+   [(proc) 
+    (set! afh proc)
+    (let ([sf saved-files])
+      (set! saved-files null)
+      (for-each proc (reverse sf)))]
    [() afh]))
 
 (define aqh void)

collects/scribblings/gui/system-menu-funcs.scrbl

@@ -113,7 +113,9 @@ When the current eventspace is the initial eventspace, this procedure
 The default handler queues a callback to the
 @method[window<%> on-drop-file] method of the most-recently activated frame in the main eventspace (see
 @scheme[get-top-level-edit-target-window]), if
- drag-and-drop is enabled for that frame.
+ drag-and-drop is enabled for that frame. Otherwise, it saves
+ the filename and re-queues the handler event when the application
+ file handler is later changed.
 
 When the application is @italic{not} running and user double-clicks an
  application-handled file or drags a file onto the application's icon,