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/* -*- 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++
%}
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