1999-03-23 15:37:34 +00:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsDragService.h"
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#include "nsITransferable.h"
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#include "nsDataObj.h"
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1999-04-06 20:25:09 +00:00
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#include "nsWidgetsCID.h"
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1999-04-17 13:49:39 +00:00
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#include "nsNativeDragTarget.h"
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#include "nsNativeDragSource.h"
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1999-04-06 20:25:09 +00:00
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#include "nsClipboard.h"
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1999-03-23 15:37:34 +00:00
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1999-04-17 13:49:39 +00:00
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#include <OLE2.h>
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#include "OLEIDL.H"
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1999-03-23 15:37:34 +00:00
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static NS_DEFINE_IID(kIDragServiceIID, NS_IDRAGSERVICE_IID);
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1999-04-17 13:49:39 +00:00
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//static NS_DEFINE_IID(kIClipboardIID, NS_ICLIPBOARD_IID);
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//static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
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1999-03-23 15:37:34 +00:00
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1999-04-17 13:49:39 +00:00
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NS_IMPL_ADDREF_INHERITED(nsDragService, nsBaseDragService)
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NS_IMPL_RELEASE_INHERITED(nsDragService, nsBaseDragService)
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1999-03-23 15:37:34 +00:00
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//-------------------------------------------------------------------------
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//
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// DragService constructor
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//
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//-------------------------------------------------------------------------
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nsDragService::nsDragService()
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{
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NS_INIT_REFCNT();
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1999-04-17 13:49:39 +00:00
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mNativeDragTarget = nsnull;
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mNativeDragSrc = nsnull;
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mDataObject = nsnull;
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1999-03-23 15:37:34 +00:00
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}
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//-------------------------------------------------------------------------
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//
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// DragService destructor
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//
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//-------------------------------------------------------------------------
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nsDragService::~nsDragService()
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{
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1999-04-17 13:49:39 +00:00
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NS_IF_RELEASE(mNativeDragSrc);
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NS_IF_RELEASE(mNativeDragTarget);
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NS_IF_RELEASE(mDataObject);
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1999-03-23 15:37:34 +00:00
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}
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/**
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* @param aIID The name of the class implementing the method
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* @param _classiiddef The name of the #define symbol that defines the IID
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* for the class (e.g. NS_ISUPPORTS_IID)
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*
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*/
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nsresult nsDragService::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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nsresult rv = NS_NOINTERFACE;
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if (aIID.Equals(kIDragServiceIID)) {
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*aInstancePtr = (void*) ((nsIDragService*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return rv;
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}
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1999-04-17 13:49:39 +00:00
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//---------------------------------------------------------
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NS_IMETHODIMP nsDragService::StartDragSession (nsITransferable * aTransferable, PRUint32 aActionType)
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1999-03-23 15:37:34 +00:00
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1999-04-17 13:49:39 +00:00
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{
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// To do the drag we need to create an object that
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// mplements the IDataObject interface (for OLE)
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//
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// We start by getting the clipboard object,
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// casting it our known class and using utility
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1999-03-23 15:37:34 +00:00
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1999-04-17 13:49:39 +00:00
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NS_IF_RELEASE(mNativeDragSrc);
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mNativeDragSrc = (IDropSource *)new nsNativeDragSource();
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if (nsnull != mNativeDragSrc) {
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mNativeDragSrc->AddRef();
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}
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mTransferable = dont_QueryInterface(aTransferable);
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IDataObject * dataObj;
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nsClipboard::CreateNativeDataObject(mTransferable, &dataObj);
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nsresult result = NS_ERROR_FAILURE;
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DWORD dropRes;
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DWORD effects = DROPEFFECT_SCROLL;
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if (aActionType & DRAGDROP_ACTION_COPY) {
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effects |= DROPEFFECT_COPY;
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}
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if (aActionType & DRAGDROP_ACTION_MOVE) {
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effects |= DROPEFFECT_MOVE;
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}
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if (aActionType & DRAGDROP_ACTION_LINK) {
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effects |= DROPEFFECT_LINK;
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}
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HRESULT res = ::DoDragDrop(dataObj, mNativeDragSrc, effects, &dropRes);
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return (DRAGDROP_S_DROP == res?NS_OK:NS_ERROR_FAILURE);
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsDragService::GetData (nsITransferable * aTransferable)
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1999-03-23 15:37:34 +00:00
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{
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1999-04-17 13:49:39 +00:00
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if (nsnull != mDataObject) {
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return nsClipboard::GetDataFromDataObject(mDataObject, nsnull, aTransferable);
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1999-04-06 20:25:09 +00:00
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}
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1999-04-17 13:49:39 +00:00
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return NS_ERROR_FAILURE;
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1999-03-23 15:37:34 +00:00
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}
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1999-04-17 13:49:39 +00:00
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//---------------------------------------------------------
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NS_IMETHODIMP nsDragService::SetIDataObject (IDataObject * aDataObj)
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{
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NS_IF_RELEASE(mDataObject);
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mDataObject = aDataObj;
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NS_ADDREF(mDataObject);
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return NS_OK;
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}
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