Files
loongoffice/winaccessibility/source/UAccCOM/AccImage.cxx
Michael Stahl d28687d517 winaccessibility: fix locking in UAccCOM
The COM components will (usually? always?) be called on the main thread
via COM, and may also be called on any thread from the UNO event
listeners.  Both ways may access the global AccWinObjectManager.
So the easiest way to lock all that without introducing new deadlocks
seems to be to just use the SolarMutex.

The fact that the main thread is in a COM STA is rather irrelevant here
since we don't currently do the required manual marshalling of the COM
pointers so they can be accessed from UNO event listeners running in
threads other than the main thread anyway.

To get that to build:
- use prewin.h and postwin.h around ATL headers
- link UAccCOM against vcl
- define both UNICODE and _UNICODE to not break on mis-matching TCHAR
  nonsense

Change-Id: I1ccdf7a4a5c2b5f0b9c29ef39d126c4b8a16898a
2013-12-12 20:06:26 +01:00

105 lines
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "stdafx.h"
#include "UAccCOM.h"
#include "AccImage.h"
#include <vcl/svapp.hxx>
#include <com/sun/star/accessibility/XAccessible.hpp>
#include <com/sun/star/accessibility/XAccessibleContext.hpp>
using namespace com::sun::star::accessibility;
using namespace com::sun::star::uno;
/**
* Get description.
* @param description Variant to get description.
* @return Result.
*/
STDMETHODIMP CAccImage::get_description(BSTR * description)
{
SolarMutexGuard g;
ENTER_PROTECTED_BLOCK
// #CHECK#
if (description == NULL)
return E_INVALIDARG;
if( !pRXImg.is() )
return E_FAIL;
::rtl::OUString ouStr = GetXInterface()->getAccessibleImageDescription();
SAFE_SYSFREESTRING(*description);
*description = SysAllocString((OLECHAR*)ouStr.getStr());
return S_OK;
LEAVE_PROTECTED_BLOCK
}
STDMETHODIMP CAccImage::get_imagePosition(
/* [in] */ enum IA2CoordinateType,
/* [out] */ long __RPC_FAR *,
/* [retval][out] */ long __RPC_FAR *)
{
return E_NOTIMPL;
}
STDMETHODIMP CAccImage::get_imageSize(
/* [out] */ long __RPC_FAR *,
/* [retval][out] */ long __RPC_FAR *)
{
return E_NOTIMPL;
}
/**
* Put UNO interface.
* @param pXInterface UNO interface.
* @return Result.
*/
STDMETHODIMP CAccImage::put_XInterface(hyper pXInterface)
{
// internal IUNOXWrapper - no mutex meeded
ENTER_PROTECTED_BLOCK
CUNOXWrapper::put_XInterface(pXInterface);
//special query.
if(pUNOInterface == NULL)
return E_FAIL;
Reference<XAccessibleContext> pRContext = pUNOInterface->getAccessibleContext();
if( !pRContext.is() )
{
return E_FAIL;
}
Reference<XAccessibleImage> pRXI(pRContext,UNO_QUERY);
if( !pRXI.is() )
pRXImg = NULL;
else
pRXImg = pRXI.get();
return S_OK;
LEAVE_PROTECTED_BLOCK
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */