First Checked In.

widget/src/xpwidgets/nsPrimitiveHelpers.cpp

@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ * 
+ * The Original Code is Mozilla Communicator.
+ * 
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corp.  Portions created by Netscape are Copyright (C) 1999 Netscape 
+ * Communications Corp.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ *   Mike Pinkerton
+ */
+
+#include "nsPrimitiveHelpers.h"
+#include "nsCOMPtr.h"
+#include "nsISupportsPrimitives.h"
+#include "nsITransferable.h"
+#include "nsIComponentManager.h"
+
+
+//
+// CreatePrimitiveForData
+//
+// Given some data and the flavor it corresponds to, creates the appropriate
+// nsISupports* wrapper for passing across IDL boundaries. Right now, everything
+// creates a two-byte |nsISupportsWString| unless the flavor is "text/plain", in which
+// case it creates a one-byte |nsISupportsString|.
+//
+void
+nsPrimitiveHelpers :: CreatePrimitiveForData ( const char* aFlavor, void* aDataBuff, 
+                                                 PRUint32 aDataLen, nsISupports** aPrimitive )
+{
+  if ( !aPrimitive )
+    return;
+
+  if ( strcmp(aFlavor,kTextMime) == 0 ) {
+    nsCOMPtr<nsISupportsString> primitive;
+    nsresult rv = nsComponentManager::CreateInstance(NS_SUPPORTS_STRING_PROGID, nsnull, 
+                                                      NS_GET_IID(nsISupportsString), getter_AddRefs(primitive));
+    if ( primitive ) {
+      primitive->SetData ( (char*)aDataBuff );
+      nsCOMPtr<nsISupports> genericPrimitive ( do_QueryInterface(primitive) );
+      *aPrimitive = genericPrimitive;
+      NS_ADDREF(*aPrimitive);
+    }
+  }
+  else {
+    nsCOMPtr<nsISupportsWString> primitive;
+    nsresult rv = nsComponentManager::CreateInstance(NS_SUPPORTS_WSTRING_PROGID, nsnull, 
+                                                      NS_GET_IID(nsISupportsWString), getter_AddRefs(primitive));
+    if ( primitive ) {
+      primitive->SetData ( (unsigned short*)aDataBuff );
+      nsCOMPtr<nsISupports> genericPrimitive ( do_QueryInterface(primitive) );
+      *aPrimitive = genericPrimitive;
+      NS_ADDREF(*aPrimitive);
+    }  
+  }
+
+} // CreatePrimitiveForData
+
+
+//
+// CreateDataFromPrimitive
+//
+// Given a nsISupports* primitive and the flavor it represents, creates a new data
+// buffer with the data in it. 
+//
+void
+nsPrimitiveHelpers :: CreateDataFromPrimitive ( const char* aFlavor, nsISupports* aPrimitive, 
+                                                   void** aDataBuff, PRUint32 aDataLen )
+{
+  if ( !aDataBuff )
+    return;
+
+  if ( strcmp(aFlavor,kTextMime) == 0 ) {
+    nsCOMPtr<nsISupportsString> plainText ( do_QueryInterface(aPrimitive) );
+    if ( plainText )
+      plainText->GetData ( NS_REINTERPRET_CAST(char**, aDataBuff) );
+  }
+  else {
+    nsCOMPtr<nsISupportsWString> doubleByteText ( do_QueryInterface(aPrimitive) );
+    if ( doubleByteText )
+      doubleByteText->GetData ( NS_REINTERPRET_CAST(unsigned short**, aDataBuff) );
+  }
+
+}

widget/src/xpwidgets/nsPrimitiveHelpers.h

@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ * 
+ * The Original Code is Mozilla Communicator.
+ * 
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corp.  Portions created by Netscape are Copyright (C) 1999 Netscape 
+ * Communications Corp.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ *   Mike Pinkerton
+ */
+
+#ifndef nsPrimitiveHelpers_h___
+#define nsPrimitiveHelpers_h___
+
+#include "prtypes.h"
+
+class nsISupports;
+
+
+class nsPrimitiveHelpers
+{
+public:
+
+  static void CreatePrimitiveForData ( const char* aFlavor, void* aDataBuff, 
+                                         PRUint32 aDataLen, nsISupports** aPrimitive ) ;
+
+  static void CreateDataFromPrimitive ( const char* aFlavor, nsISupports* aPrimitive, 
+                                         void** aDataBuff, PRUint32 aDataLen ) ;
+
+}; // class nsPrimitiveHelpers
+
+
+#endif // nsPrimitiveHelpers_h___