(mac_aelist_to_lisp, mac_aedesc_to_lisp): Change arg 1 to

`const AEDesc *'.
[TARGET_API_MAC_CARBON] (create_apple_event): New function.
[TARGET_API_MAC_CARBON] (create_apple_event_from_event_ref): Use it.
Use xrealloc instead of repeated xmalloc/xfree.
[TARGET_API_MAC_CARBON] (create_apple_event_from_drag_ref): New
function.

1 files changed, 98 insertions, 16 deletions

diff --git a/src/mac.c b/src/mac.c
index 444320322c3..c23fc1d582e 100644
--- a/src/mac.c
+++ b/src/mac.c
@@ -272,7 +272,7 @@ static Lisp_Object Qundecoded_file_name;
 
 static Lisp_Object
 mac_aelist_to_lisp (desc_list)
-     AEDescList *desc_list;
+     const AEDescList *desc_list;
 {
   OSErr err;
   long count;
@@ -337,7 +337,7 @@ mac_aelist_to_lisp (desc_list)
 
 Lisp_Object
 mac_aedesc_to_lisp (desc)
-     AEDesc *desc;
+     const AEDesc *desc;
 {
   OSErr err = noErr;
   DescType desc_type = desc->descriptorType;
@@ -665,33 +665,46 @@ init_coercion_handler ()
 }
 
 #if TARGET_API_MAC_CARBON
-OSErr
-create_apple_event_from_event_ref (event, num_params, names, types, result)
-     EventRef event;
-     UInt32 num_params;
-     EventParamName *names;
-     EventParamType *types;
+static OSErr
+create_apple_event (class, id, result)
+     AEEventClass class;
+     AEEventID id;
      AppleEvent *result;
 {
   OSErr err;
   static const ProcessSerialNumber psn = {0, kCurrentProcess};
   AEAddressDesc address_desc;
-  UInt32 i, size;
-  CFStringRef string;
-  CFDataRef data;
-  char *buf;
 
   err = AECreateDesc (typeProcessSerialNumber, &psn,
                       sizeof (ProcessSerialNumber), &address_desc);
   if (err == noErr)
     {
-      err = AECreateAppleEvent (0, 0, /* Dummy class and ID.   */
+      err = AECreateAppleEvent (class, id,
                                 &address_desc, /* NULL is not allowed
                                                   on Mac OS Classic. */
                                 kAutoGenerateReturnID,
                                 kAnyTransactionID, result);
       AEDisposeDesc (&address_desc);
     }
+
+  return err;
+}
+
+OSErr
+create_apple_event_from_event_ref (event, num_params, names, types, result)
+     EventRef event;
+     UInt32 num_params;
+     EventParamName *names;
+     EventParamType *types;
+     AppleEvent *result;
+{
+  OSErr err;
+  UInt32 i, size;
+  CFStringRef string;
+  CFDataRef data;
+  char *buf = NULL;
+
+  err = create_apple_event (0, 0, result); /* Dummy class and ID.  */
   if (err != noErr)
     return err;
 
@@ -721,19 +734,88 @@ create_apple_event_from_event_ref (event, num_params, names, types, result)
                                  0, &size, NULL);
         if (err != noErr)
           break;
-        buf = xmalloc (size);
+        buf = xrealloc (buf, size);
         err = GetEventParameter (event, names[i], types[i], NULL,
                                  size, NULL, buf);
         if (err == noErr)
           AEPutParamPtr (result, names[i], types[i], buf, size);
-        xfree (buf);
         break;
       }
+  if (buf)
+    xfree (buf);
 
   return noErr;
 }
-#endif
 
+OSErr
+create_apple_event_from_drag_ref (drag, num_types, types, result)
+     DragRef drag;
+     UInt32 num_types;
+     FlavorType *types;
+     AppleEvent *result;
+{
+  OSErr err;
+  UInt16 num_items;
+  AppleEvent items;
+  long index;
+  char *buf = NULL;
+
+  err = CountDragItems (drag, &num_items);
+  if (err != noErr)
+    return err;
+  err = AECreateList (NULL, 0, false, &items);
+  if (err != noErr)
+    return err;
+
+  for (index = 1; index <= num_items; index++)
+    {
+      ItemReference item;
+      DescType desc_type = typeNull;
+      Size size;
+
+      err = GetDragItemReferenceNumber (drag, index, &item);
+      if (err == noErr)
+        {
+          int i;
+
+          for (i = 0; i < num_types; i++)
+            {
+              err = GetFlavorDataSize (drag, item, types[i], &size);
+              if (err == noErr)
+                {
+                  buf = xrealloc (buf, size);
+                  err = GetFlavorData (drag, item, types[i], buf, &size, 0);
+                }
+              if (err == noErr)
+                {
+                  desc_type = types[i];
+                  break;
+                }
+            }
+        }
+      err = AEPutPtr (&items, index, desc_type,
+                      desc_type != typeNull ? buf : NULL,
+                      desc_type != typeNull ? size : 0);
+      if (err != noErr)
+        break;
+    }
+  if (buf)
+    xfree (buf);
+
+  if (err == noErr)
+    {
+      err = create_apple_event (0, 0, result); /* Dummy class and ID.  */
+      if (err == noErr)
+        err = AEPutParamDesc (result, keyDirectObject, &items);
+      if (err != noErr)
+        AEDisposeDesc (result);
+    }
+
+  AEDisposeDesc (&items);
+
+  return err;
+}
+#endif  /* TARGET_API_MAC_CARBON */
 
 /***********************************************************************
          Conversion between Lisp and Core Foundation objects