Plumb the DragOperation through all the layers between the platform DnD code ...

webkit/glue/webview_delegate.h

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // WebCore provides hooks for several kinds of functionality, allowing separate
 // classes termed "delegates" to receive notifications (in the form of direct
 // function calls) when certain events are about to occur or have just occurred.
 // In some cases, the delegate implements the needed functionality; in others,
 // the delegate has some control over the behavior but doesn't actually
 // implement it.  For example, the UI delegate is responsible for showing a
@@ skipping 10 matching lines @@
 // the needed functionality of the WebKit UIDelegate, ContextMenuDelegate,
 // PolicyDelegate, FrameLoadDelegate, and EditorDelegate; additional portions
 // of ChromeClient and FrameLoaderClient not delegated in the WebKit
 // implementation; and some WebView additions.
 
 #ifndef WEBKIT_GLUE_WEBVIEW_DELEGATE_H_
 #define WEBKIT_GLUE_WEBVIEW_DELEGATE_H_
 
 #include <vector>
 
+#include "webkit/api/public/WebDragOperation.h"
 #include "webkit/api/public/WebFrame.h"
 #include "webkit/api/public/WebNavigationPolicy.h"
 #include "webkit/api/public/WebNavigationType.h"
 #include "webkit/api/public/WebTextDirection.h"
 #include "webkit/api/public/WebWidgetClient.h"
 #include "webkit/glue/context_menu.h"
 
 namespace webkit_glue {
 class WebMediaPlayerDelegate;
 struct WebPluginGeometry;
@@ skipping 591 matching lines @@
                                const ContextMenuMediaParams& media_params,
                                const std::wstring& selection_text,
                                const std::wstring& misspelled_word,
                                int edit_flags,
                                const std::string& security_info,
                                const std::string& frame_charset) {
   }
 
   // Starts a drag session with the supplied contextual information.
   // webview: The WebView sending the delegate method.
+  // mouseCoords: Current mouse coordinates
   // drop_data: a WebDropData struct which should contain all the necessary
   // information for dragging data out of the webview.
+  // drag_source_operation_mask: indicates what drag operations are allowed
   virtual void StartDragging(WebView* webview,
-                             const WebKit::WebDragData& drag_data) {
+                             const WebKit::WebPoint &mouseCoords,
+                             const WebKit::WebDragData& drag_data,
+                             WebKit::WebDragOperationsMask operations_mask) {
   }
 
   // Returns the focus to the client.
   // reverse: Whether the focus should go to the previous (if true) or the next
   // focusable element.
   virtual void TakeFocus(WebView* webview, bool reverse) {
   }
 
   // Displays JS out-of-memory warning in the infobar
   virtual void JSOutOfMemory() {
@@ skipping 165 matching lines @@
   // Called when an item was added to the history
   virtual void DidAddHistoryItem() { }
 
   WebViewDelegate() { }
 
  protected:
   ~WebViewDelegate() { }
 };
 
 #endif  // WEBKIT_GLUE_WEBVIEW_DELEGATE_H_