diff -r 000000000000 -r 6474c204b198 widget/nsIDragService.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/nsIDragService.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,122 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsISupportsArray.idl"
+#include "nsIDragSession.idl"
+#include "nsIScriptableRegion.idl"
+
+
+interface nsIDOMNode;
+interface nsIDOMDragEvent;
+interface nsIDOMDataTransfer;
+interface nsISelection;
+
+[scriptable, uuid(82B58ADA-F490-4C3D-B737-1057C4F1D052), builtinclass]
+interface nsIDragService : nsISupports
+{
+  const long DRAGDROP_ACTION_NONE = 0;
+  const long DRAGDROP_ACTION_COPY = 1;
+  const long DRAGDROP_ACTION_MOVE = 2;
+  const long DRAGDROP_ACTION_LINK = 4;
+  const long DRAGDROP_ACTION_UNINITIALIZED = 64;
+
+  /**
+    * Starts a modal drag session with an array of transaferables 
+    *
+    * @param  aTransferables - an array of transferables to be dragged
+    * @param  aRegion - a region containing rectangles for cursor feedback, 
+    *            in window coordinates.
+    * @param  aActionType - specified which of copy/move/link are allowed
+    */
+  void invokeDragSession ( in nsIDOMNode aDOMNode, in nsISupportsArray aTransferables, 
+                             in nsIScriptableRegion aRegion, in unsigned long aActionType );
+
+  /**
+   * Starts a modal drag session using an image. The first four arguments are
+   * the same as invokeDragSession.
+   *
+   * A custom image may be specified using the aImage argument. If this is
+   * supplied, the aImageX and aImageY arguments specify the offset within
+   * the image where the cursor would be positioned. That is, when the image
+   * is drawn, it is offset up and left the amount so that the cursor appears
+   * at that location within the image.
+   *
+   * If aImage is null, aImageX and aImageY are not used and the image is instead
+   * determined from the source node aDOMNode, and the offset calculated so that
+   * the initial location for the image appears in the same screen position as
+   * where the element is located. The node must be within a document.
+   *
+   * Currently, supported images are all DOM nodes. If this is an HTML <image> or
+   * <canvas>, the drag image is taken from the image data. If the element is in
+   * a document, it will be rendered at its displayed size, othewise, it will be
+   * rendered at its real size. For other types of elements, the element is
+   * rendered into an offscreen buffer in the same manner as it is currently
+   * displayed. The document selection is hidden while drawing.
+   *
+   * The aDragEvent must be supplied as the current screen coordinates of the
+   * event are needed to calculate the image location.
+   */
+  void invokeDragSessionWithImage(in nsIDOMNode aDOMNode,
+                                  in nsISupportsArray aTransferableArray,
+                                  in nsIScriptableRegion aRegion,
+                                  in unsigned long aActionType,
+                                  in nsIDOMNode aImage,
+                                  in long aImageX,
+                                  in long aImageY,
+                                  in nsIDOMDragEvent aDragEvent,
+                                  in nsIDOMDataTransfer aDataTransfer);
+
+  /**
+   * Start a modal drag session using the selection as the drag image.
+   * The aDragEvent must be supplied as the current screen coordinates of the
+   * event are needed to calculate the image location.
+   */
+  void invokeDragSessionWithSelection(in nsISelection aSelection,
+                                      in nsISupportsArray aTransferableArray,
+                                      in unsigned long aActionType,
+                                      in nsIDOMDragEvent aDragEvent,
+                                      in nsIDOMDataTransfer aDataTransfer);
+
+  /**
+    * Returns the current Drag Session  
+    */
+  nsIDragSession getCurrentSession ( ) ;
+
+  /**
+    * Tells the Drag Service to start a drag session. This is called when
+    * an external drag occurs
+    */
+  void startDragSession ( ) ;
+
+  /**
+    * Tells the Drag Service to end a drag session. This is called when
+    * an external drag occurs
+    *
+    * If aDoneDrag is true, the drag has finished, otherwise the drag has
+    * just left the window.
+    */
+  void endDragSession ( in boolean aDoneDrag ) ;
+
+  /**
+   * Fire a drag event at the source of the drag
+   */
+  void fireDragEventAtSource ( in unsigned long aMsg );
+
+  /**
+   * Increase/decrease dragging suppress level by one.
+   * If level is greater than one, dragging is disabled.
+   */
+  void suppress();
+  void unsuppress();
+
+  [noscript] void dragMoved(in long aX, in long aY);
+};
+
+
+%{ C++
+
+%}