зеркало из https://github.com/mozilla/pjs.git
168 строки
5.6 KiB
C++
168 строки
5.6 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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* Ehsan Akhgari.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Ehsan Akhgari <ehsan.akhgari@gmail.com> (Original author)
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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 "mozilla/Util.h"
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#include "nsClipboardPrivacyHandler.h"
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#include "nsITransferable.h"
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#include "nsISupportsPrimitives.h"
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#include "nsIObserverService.h"
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#include "nsIClipboard.h"
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#include "nsComponentManagerUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsLiteralString.h"
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#include "nsNetCID.h"
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#include "nsXPCOM.h"
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#include "mozilla/Services.h"
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#if defined(XP_WIN)
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#include <ole2.h>
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#endif
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using namespace mozilla;
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#define NS_MOZ_DATA_FROM_PRIVATEBROWSING "application/x-moz-private-browsing"
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NS_IMPL_ISUPPORTS2(nsClipboardPrivacyHandler, nsIObserver, nsISupportsWeakReference)
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nsresult
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nsClipboardPrivacyHandler::Init()
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{
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (!observerService)
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return NS_ERROR_FAILURE;
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return observerService->AddObserver(this, NS_PRIVATE_BROWSING_SWITCH_TOPIC,
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true);
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}
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/**
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* Prepare the transferable object to be inserted into the clipboard
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*
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*/
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nsresult
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nsClipboardPrivacyHandler::PrepareDataForClipboard(nsITransferable * aTransferable)
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{
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NS_ASSERTION(aTransferable, "clipboard given a null transferable");
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nsresult rv = NS_OK;
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if (InPrivateBrowsing()) {
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nsCOMPtr<nsISupportsPRBool> data = do_CreateInstance(NS_SUPPORTS_PRBOOL_CONTRACTID);
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if (data) {
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rv = data->SetData(true);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = aTransferable->AddDataFlavor(NS_MOZ_DATA_FROM_PRIVATEBROWSING);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = aTransferable->SetTransferData(NS_MOZ_DATA_FROM_PRIVATEBROWSING, data, sizeof(bool));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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}
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return rv;
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}
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NS_IMETHODIMP
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nsClipboardPrivacyHandler::Observe(nsISupports *aSubject, char const *aTopic, PRUnichar const *aData)
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{
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if (NS_LITERAL_STRING(NS_PRIVATE_BROWSING_LEAVE).Equals(aData)) {
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nsresult rv;
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nsCOMPtr<nsIClipboard> clipboard =
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do_GetService("@mozilla.org/widget/clipboard;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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const char * flavors[] = { NS_MOZ_DATA_FROM_PRIVATEBROWSING };
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bool haveFlavors;
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rv = clipboard->HasDataMatchingFlavors(flavors,
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ArrayLength(flavors),
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nsIClipboard::kGlobalClipboard,
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&haveFlavors);
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if (NS_SUCCEEDED(rv) && haveFlavors) {
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#if defined(XP_WIN)
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// Workaround for bug 518412. On Windows 7 x64, there is a bug
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// in handling clipboard data without any formats between
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// 32-bit/64-bit boundaries, which could lead Explorer to crash.
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// We work around the problem by clearing the clipboard using
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// the usual Win32 API.
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NS_ENSURE_TRUE(SUCCEEDED(::OleSetClipboard(NULL)), NS_ERROR_FAILURE);
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#else
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// Empty the native clipboard by copying an empty transferable
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nsCOMPtr<nsITransferable> nullData =
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do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = clipboard->SetData(nullData, nsnull,
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nsIClipboard::kGlobalClipboard);
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NS_ENSURE_SUCCESS(rv, rv);
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#endif
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}
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}
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return NS_OK;
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}
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bool
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nsClipboardPrivacyHandler::InPrivateBrowsing()
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{
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bool inPrivateBrowsingMode = false;
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if (!mPBService)
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mPBService = do_GetService(NS_PRIVATE_BROWSING_SERVICE_CONTRACTID);
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if (mPBService)
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mPBService->GetPrivateBrowsingEnabled(&inPrivateBrowsingMode);
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return inPrivateBrowsingMode;
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}
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nsresult
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NS_NewClipboardPrivacyHandler(nsClipboardPrivacyHandler ** aHandler)
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{
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NS_PRECONDITION(aHandler != nsnull, "null ptr");
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if (!aHandler)
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return NS_ERROR_NULL_POINTER;
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*aHandler = new nsClipboardPrivacyHandler();
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if (!*aHandler)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aHandler);
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nsresult rv = (*aHandler)->Init();
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if (NS_FAILED(rv))
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NS_RELEASE(*aHandler);
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return rv;
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}
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