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diff --git a/WebCore/page/mac/DragControllerMac.mm b/WebCore/page/mac/DragControllerMac.mm
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+++ b/WebCore/page/mac/DragControllerMac.mm
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+/*
+ * Copyright (C) 2007 Apple Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#import "config.h"
+#import "DragController.h"
+
+#import "DragData.h"
+#import "Frame.h"
+#import "FrameView.h"
+#import "Page.h"
+
+namespace WebCore {
+
+const int DragController::LinkDragBorderInset = -2;
+
+const int DragController::MaxOriginalImageArea = 1500 * 1500;
+const int DragController::DragIconRightInset = 7;
+const int DragController::DragIconBottomInset = 3;
+
+const float DragController::DragImageAlpha = 0.75f;
+
+bool DragController::isCopyKeyDown()
+{
+    return [[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask;
+}
+    
+DragOperation DragController::dragOperation(DragData* dragData)
+{
+    ASSERT(dragData);
+    if ([NSApp modalWindow] || !dragData->containsURL())
+        return DragOperationNone;
+    
+    if (!m_document || ![[m_page->mainFrame()->view()->getOuterView() window] attachedSheet] 
+        && [dragData->platformData() draggingSource] != m_page->mainFrame()->view()->getOuterView())
+        return DragOperationCopy;
+        
+    return DragOperationNone;
+} 
+
+const IntSize& DragController::maxDragImageSize()
+{
+    static const IntSize maxDragImageSize(400, 400);
+    
+    return maxDragImageSize;
+}
+
+}