308 lines
9.5 KiB
C++
308 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Lars Knoll <knoll@kde.org>
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* Zack Rusin <zack@kde.org>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Denis Issoupov <denis@macadamian.com>
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* John C. Griggs <johng@corel.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifdef NDEBUG
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#define NO_DEBUG
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#endif
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#include "nsDragService.h"
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#include "nsIServiceManager.h"
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#include "nsXPCOM.h"
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#include "nsISupportsPrimitives.h"
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#include "nsCOMPtr.h"
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#include "nsXPIDLString.h"
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#include "nsPrimitiveHelpers.h"
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#include "nsMime.h"
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#include "nsWidgetsCID.h"
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#include "nsString.h"
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// static NS_DEFINE_IID(kIDragServiceIID, NS_IDRAGSERVICE_IID);
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// static NS_DEFINE_IID(kIDragSessionQtIID, NS_IDRAGSESSIONQT_IID);
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// static NS_DEFINE_CID(kCDragServiceCID, NS_DRAGSERVICE_CID);
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NS_IMPL_ADDREF_INHERITED(nsDragService, nsBaseDragService)
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NS_IMPL_RELEASE_INHERITED(nsDragService, nsBaseDragService)
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NS_IMPL_QUERY_INTERFACE3(nsDragService, nsIDragService, nsIDragSession, nsIDragSessionQt )
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//-------------------------------------------------------------------------
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// static variables
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//-------------------------------------------------------------------------
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static PRBool gHaveDrag = PR_FALSE;
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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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// our hidden source widget
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mHiddenWidget = new QWidget(0,QWidget::tr("DragDrop"),0);
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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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delete mHiddenWidget;
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}
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//---------------------------------------------------------
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NS_IMETHODIMP
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nsDragService::InvokeDragSession(nsIDOMNode *aDOMNode,
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nsISupportsArray *aArrayTransferables,
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nsIScriptableRegion *aRegion,
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PRUint32 aActionType)
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{
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PRUint32 numItemsToDrag = 0;
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nsBaseDragService::InvokeDragSession(aDOMNode, aArrayTransferables,
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aRegion, aActionType);
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// make sure that we have an array of transferables to use
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if (!aArrayTransferables) {
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return NS_ERROR_INVALID_ARG;
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}
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// set our reference to the transferables. this will also addref
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// the transferables since we're going to hang onto this beyond the
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// length of this call
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mSourceDataItems = aArrayTransferables;
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mSourceDataItems->Count(&numItemsToDrag);
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if (!numItemsToDrag) {
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return NS_ERROR_FAILURE;
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}
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if (numItemsToDrag > 1) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsISupports> genericItem;
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mSourceDataItems->GetElementAt(0,getter_AddRefs(genericItem));
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nsCOMPtr<nsITransferable> transferable(do_QueryInterface(genericItem));
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mDragObject = RegisterDragFlavors(transferable);
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gHaveDrag = PR_TRUE;
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if (aActionType == DRAGDROP_ACTION_MOVE)
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mDragObject->dragMove();
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else
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mDragObject->dragCopy();
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gHaveDrag = PR_FALSE;
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mDragObject = 0;
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return NS_OK;
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}
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QDragObject *nsDragService::RegisterDragFlavors(nsITransferable *transferable)
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{
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nsMimeStore *pMimeStore = new nsMimeStore();
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nsCOMPtr<nsISupportsArray> flavorList;
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if (NS_SUCCEEDED(transferable->FlavorsTransferableCanExport(getter_AddRefs(flavorList)))) {
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PRUint32 numFlavors;
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flavorList->Count(&numFlavors);
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for (PRUint32 flavorIndex = 0; flavorIndex < numFlavors; ++flavorIndex) {
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nsCOMPtr<nsISupports> genericWrapper;
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flavorList->GetElementAt(flavorIndex,getter_AddRefs(genericWrapper));
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nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericWrapper));
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if (currentFlavor) {
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nsXPIDLCString flavorStr;
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currentFlavor->ToString(getter_Copies(flavorStr));
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PRUint32 len;
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nsCOMPtr<nsISupports> clip;
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transferable->GetTransferData(flavorStr,getter_AddRefs(clip),&len);
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nsCOMPtr<nsISupportsString> wideString;
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wideString = do_QueryInterface(clip);
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if (!wideString)
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continue;
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nsAutoString ucs2string;
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wideString->GetData(ucs2string);
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QString str = QString::fromUcs2(ucs2string.get());
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pMimeStore->AddFlavorData(flavorStr,str.utf8());
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}
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} // foreach flavor in item
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} // if valid flavor list
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#ifdef NS_DEBUG
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else
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printf(" DnD ERROR: cannot export any flavor\n");
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#endif
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return new nsDragObject(pMimeStore,mHiddenWidget);
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} // RegisterDragItemsAndFlavors
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NS_IMETHODIMP nsDragService::StartDragSession()
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{
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#ifdef NS_DEBUG
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printf(" DnD: StartDragSession\n");
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#endif
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return nsBaseDragService::StartDragSession();
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}
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NS_IMETHODIMP nsDragService::EndDragSession()
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{
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#ifdef NS_DEBUG
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printf(" DnD: EndDragSession\n");
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#endif
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mDragObject = 0;
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return nsBaseDragService::EndDragSession();
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}
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// nsIDragSession
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NS_IMETHODIMP nsDragService::SetCanDrop(PRBool aCanDrop)
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{
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mCanDrop = aCanDrop;
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return NS_OK;
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}
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NS_IMETHODIMP nsDragService::GetCanDrop(PRBool *aCanDrop)
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{
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*aCanDrop = mCanDrop;
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return NS_OK;
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}
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NS_IMETHODIMP nsDragService::GetNumDropItems(PRUint32 *aNumItems)
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{
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*aNumItems = 1;
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return NS_OK;
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}
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NS_IMETHODIMP nsDragService::GetData(nsITransferable *aTransferable,
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PRUint32 aItemIndex)
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{
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// make sure that we have a transferable
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if (!aTransferable)
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return NS_ERROR_INVALID_ARG;
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nsresult rv = NS_ERROR_FAILURE;
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nsCOMPtr<nsISupportsArray> flavorList;
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rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
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if (NS_FAILED(rv))
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return rv;
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// count the number of flavors
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PRUint32 cnt;
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flavorList->Count(&cnt);
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// Now walk down the list of flavors. When we find one that is
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// actually present, copy out the data into the transferable in that
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// format. SetTransferData() implicitly handles conversions.
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for (unsigned int i = 0; i < cnt; ++i) {
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nsCAutoString foundFlavor;
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nsCOMPtr<nsISupports> genericWrapper;
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flavorList->GetElementAt(i,getter_AddRefs(genericWrapper));
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nsCOMPtr<nsISupportsCString> currentFlavor;
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currentFlavor = do_QueryInterface(genericWrapper);
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if (currentFlavor) {
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nsXPIDLCString flavorStr;
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currentFlavor->ToString(getter_Copies(flavorStr));
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foundFlavor = nsCAutoString(flavorStr);
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if (mDragObject && mDragObject->provides(flavorStr)) {
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QByteArray ba = mDragObject->encodedData((const char*)flavorStr);
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nsCOMPtr<nsISupports> genericDataWrapper;
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PRUint32 len = (PRUint32)ba.count();
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nsPrimitiveHelpers::CreatePrimitiveForData(foundFlavor.get(),
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(void*)ba.data(),len,
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getter_AddRefs(genericDataWrapper));
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aTransferable->SetTransferData(foundFlavor.get(),genericDataWrapper,len);
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}
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDragService::IsDataFlavorSupported(const char *aDataFlavor,
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PRBool *_retval)
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{
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if (!_retval)
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return NS_ERROR_INVALID_ARG;
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*_retval = PR_FALSE;
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if (mDragObject)
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*_retval = mDragObject->provides(aDataFlavor);
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#ifdef NS_DEBUG
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if (!*_retval)
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printf("nsDragService::IsDataFlavorSupported not provides [%s] \n", aDataFlavor);
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#endif
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return NS_OK;
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}
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NS_IMETHODIMP nsDragService::SetDragReference(QMimeSource* aDragRef)
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{
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nsMimeStore* pMimeStore = new nsMimeStore();
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int c = 0;
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const char* format;
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while ((format = aDragRef->format(c++)) != 0) {
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// this is usualy between different processes
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// so, we need to copy datafrom one to onother
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QByteArray ba = aDragRef->encodedData(format);
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pMimeStore->AddFlavorData(format,ba);
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}
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mDragObject = new nsDragObject(pMimeStore,mHiddenWidget);
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return NS_OK;
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}
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