зеркало из https://github.com/mozilla/gecko-dev.git
142 строки
3.8 KiB
C++
142 строки
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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*
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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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#include "nsNativeDragSource.h"
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#include <stdio.h>
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#include "nsISupportsImpl.h"
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#include "nsString.h"
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#include "nsIServiceManager.h"
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#include "nsToolkit.h"
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#include "nsWidgetsCID.h"
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#include "nsIDragService.h"
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static NS_DEFINE_IID(kCDragServiceCID, NS_DRAGSERVICE_CID);
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/*
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* class nsNativeDragSource
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*/
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nsNativeDragSource::nsNativeDragSource(nsIDOMDataTransfer* aDataTransfer) :
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m_cRef(0),
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m_hCursor(nsnull),
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mUserCancelled(false)
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{
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mDataTransfer = do_QueryInterface(aDataTransfer);
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}
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nsNativeDragSource::~nsNativeDragSource()
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{
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}
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STDMETHODIMP
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nsNativeDragSource::QueryInterface(REFIID riid, void** ppv)
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{
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*ppv=NULL;
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if (IID_IUnknown==riid || IID_IDropSource==riid)
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*ppv=this;
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if (NULL!=*ppv) {
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((LPUNKNOWN)*ppv)->AddRef();
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return S_OK;
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}
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return E_NOINTERFACE;
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}
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STDMETHODIMP_(ULONG)
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nsNativeDragSource::AddRef(void)
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{
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++m_cRef;
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NS_LOG_ADDREF(this, m_cRef, "nsNativeDragSource", sizeof(*this));
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return m_cRef;
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}
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STDMETHODIMP_(ULONG)
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nsNativeDragSource::Release(void)
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{
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--m_cRef;
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NS_LOG_RELEASE(this, m_cRef, "nsNativeDragSource");
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if (0 != m_cRef)
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return m_cRef;
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delete this;
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return 0;
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}
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STDMETHODIMP
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nsNativeDragSource::QueryContinueDrag(BOOL fEsc, DWORD grfKeyState)
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{
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nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);
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if (dragService) {
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DWORD pos = ::GetMessagePos();
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dragService->DragMoved(GET_X_LPARAM(pos), GET_Y_LPARAM(pos));
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}
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if (fEsc) {
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mUserCancelled = true;
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return DRAGDROP_S_CANCEL;
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}
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if (!(grfKeyState & MK_LBUTTON) || (grfKeyState & MK_RBUTTON))
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return DRAGDROP_S_DROP;
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return S_OK;
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}
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STDMETHODIMP
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nsNativeDragSource::GiveFeedback(DWORD dwEffect)
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{
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// For drags involving tabs, we do some custom work with cursors.
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if (mDataTransfer) {
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nsAutoString cursor;
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mDataTransfer->GetMozCursor(cursor);
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if (cursor.EqualsLiteral("default")) {
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m_hCursor = ::LoadCursor(0, IDC_ARROW);
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} else {
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m_hCursor = nsnull;
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}
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}
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if (m_hCursor) {
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::SetCursor(m_hCursor);
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return S_OK;
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}
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// Let the system choose which cursor to apply.
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return DRAGDROP_S_USEDEFAULTCURSORS;
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}
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