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/* -*- 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 <rtl/ref.hxx>
#include <sal/log.hxx>
#include <cppuhelper/implbase.hxx>
#include <cppuhelper/factory.hxx>
#include <cppuhelper/implementationentry.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/accessibility/XMSAAService.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/awt/XExtendedToolkit.hpp>
#include <vcl/svapp.hxx>
#include <vcl/window.hxx>
#include <prewin.h>
#include <postwin.h>
#include <AccTopWindowListener.hxx>
using namespace ::com::sun::star; // for odk interfaces
using namespace ::com::sun::star::uno; // for basic types
using namespace ::com::sun::star::accessibility;
using namespace ::com::sun::star::awt;
namespace my_sc_impl
{
namespace {
class MSAAServiceImpl : public ::cppu::WeakImplHelper<
XMSAAService, lang::XServiceInfo >
{
private:
rtl::Reference<AccTopWindowListener> m_pTopWindowListener;
public:
MSAAServiceImpl ();
// XComponent - as used by VCL to lifecycle manage this bridge.
virtual void SAL_CALL dispose() override;
virtual void SAL_CALL addEventListener( const css::uno::Reference< css::lang::XEventListener >& ) override
{ /* dummy */ }
virtual void SAL_CALL removeEventListener( const css::uno::Reference< css::lang::XEventListener >& ) override
{ /* dummy */ }
// XMSAAService
virtual sal_Int64 SAL_CALL getAccObjectPtr(
sal_Int64 hWnd, sal_Int64 lParam, sal_Int64 wParam) override;
virtual void SAL_CALL handleWindowOpened(sal_Int64) override;
// XServiceInfo
virtual OUString SAL_CALL getImplementationName() override;
virtual sal_Bool SAL_CALL supportsService( OUString const & serviceName ) override;
virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
};
}
/**
* Implementation of getAccObjectPtr.
* @param
* @return Com interface.
*/
sal_Int64 MSAAServiceImpl::getAccObjectPtr(
sal_Int64 hWnd, sal_Int64 lParam, sal_Int64 wParam)
{
// tdf#155794: this must complete without taking SolarMutex
if (!m_pTopWindowListener.is())
{
return 0;
}
return m_pTopWindowListener->GetMSComPtr(hWnd, lParam, wParam);
}
/**
* Implementation of handleWindowOpened, the method will be invoked when a
* top window is opened and AT starts up.
* @param
* @return
*/
void MSAAServiceImpl::handleWindowOpened(sal_Int64 nAcc)
{
SolarMutexGuard g;
SAL_INFO( "iacc2", "Window opened " << nAcc );
if (m_pTopWindowListener.is() && nAcc)
{
m_pTopWindowListener->HandleWindowOpened(
static_cast<css::accessibility::XAccessible*>(
reinterpret_cast<void*>(nAcc)));
}
}
OUString MSAAServiceImpl::getImplementationName()
{
return "com.sun.star.accessibility.my_sc_implementation.MSAAService";
}
/**
* Implementation of XServiceInfo, return support service name.
* @param Service name.
* @return If the service name is supported.
*/
sal_Bool MSAAServiceImpl::supportsService( OUString const & serviceName )
{
return cppu::supportsService(this, serviceName);
}
/**
* Implementation of XServiceInfo, return all service names.
* @param.
* @return service name sequence.
*/
Sequence< OUString > MSAAServiceImpl::getSupportedServiceNames()
{
return { "com.sun.star.accessibility.MSAAService" };
}
static void AccessBridgeHandleExistingWindow(const Reference< XMSAAService > &xAccMgr,
vcl::Window *pWindow, bool bShow)
{
if ( pWindow )
{
css::uno::Reference< css::accessibility::XAccessible > xAccessible;
SAL_INFO( "iacc2", "Decide whether to register existing window with IAccessible2" );
// Test for combo box - drop down floating windows first
vcl::Window * pParentWindow = pWindow->GetParent();
if ( pParentWindow )
{
try
{
// The parent window of a combo box floating window should have the role COMBO_BOX
css::uno::Reference< css::accessibility::XAccessible > xParentAccessible(pParentWindow->GetAccessible());
if ( xParentAccessible.is() )
{
css::uno::Reference< css::accessibility::XAccessibleContext > xParentAC( xParentAccessible->getAccessibleContext() );
if ( xParentAC.is() && (css::accessibility::AccessibleRole::COMBO_BOX == xParentAC->getAccessibleRole()) )
{
// O.k. - this is a combo box floating window corresponding to the child of role LIST of the parent.
// Let's not rely on a specific child order, just search for the child with the role LIST
sal_Int64 nCount = xParentAC->getAccessibleChildCount();
for (sal_Int64 n = 0; (n < nCount) && !xAccessible.is(); n++)
{
css::uno::Reference< css::accessibility::XAccessible > xChild = xParentAC->getAccessibleChild(n);
if ( xChild.is() )
{
css::uno::Reference< css::accessibility::XAccessibleContext > xChildAC = xChild->getAccessibleContext();
if ( xChildAC.is() && (css::accessibility::AccessibleRole::LIST == xChildAC->getAccessibleRole()) )
{
xAccessible = xChild;
}
}
}
}
}
}
catch (css::uno::RuntimeException const&)
{
// Ignore show events that throw DisposedExceptions in getAccessibleContext(),
// but keep revoking these windows in hide(s).
if (bShow)
return;
}
}
// We have to rely on the fact that Window::GetAccessible()->getAccessibleContext() returns a valid XAccessibleContext
// also for other menus than menubar or toplevel popup window. Otherwise we had to traverse the hierarchy to find the
// context object to this menu floater. This makes the call to Window->IsMenuFloatingWindow() obsolete.
if ( ! xAccessible.is() )
xAccessible = pWindow->GetAccessible();
assert( xAccMgr.is() );
if ( xAccessible.is() )
{
xAccMgr->handleWindowOpened(
reinterpret_cast<sal_Int64>(xAccessible.get()));
SAL_INFO( "iacc2", "Decide whether to register existing window with IAccessible2" );
}
}
}
/*
* Setup and notify the OS of Accessible peers for all existing windows.
*/
static void AccessBridgeUpdateOldTopWindows( const Reference< XMSAAService > &xAccMgr )
{
sal_uInt16 nTopWindowCount = static_cast<sal_uInt16>(Application::GetTopWindowCount());
for ( sal_uInt16 i = 0; i < nTopWindowCount; i++ )
{
vcl::Window* pTopWindow = Application::GetTopWindow( i );
css::uno::Reference< css::accessibility::XAccessible > xAccessible = pTopWindow->GetAccessible();
if ( xAccessible.is() )
{
css::uno::Reference< css::accessibility::XAccessibleContext > xAC( xAccessible->getAccessibleContext() );
if ( xAC.is())
{
if ( !xAC->getAccessibleName().isEmpty() )
AccessBridgeHandleExistingWindow( xAccMgr, pTopWindow, true );
}
}
}
}
MSAAServiceImpl::MSAAServiceImpl()
{
Reference< XExtendedToolkit > xToolkit(Application::GetVCLToolkit(), UNO_QUERY);
if( xToolkit.is() )
{
m_pTopWindowListener.set(new AccTopWindowListener());
Reference<XTopWindowListener> const xRef(m_pTopWindowListener);
xToolkit->addTopWindowListener( xRef );
SAL_INFO( "iacc2", "successfully connected to the toolkit event hose" );
}
else
SAL_WARN( "iacc2", "No VCL toolkit interface to listen to for events");
}
void MSAAServiceImpl::dispose()
{
SolarMutexGuard g;
// As all folders and streams contain references to their parents,
// we must remove these references so that they will be deleted when
// the hash_map of the root folder is cleared, releasing all subfolders
// and substreams which in turn release theirs, etc. When xRootFolder is
// released when this destructor completes, the folder tree should be
// deleted fully (and automagically).
m_pTopWindowListener.clear();
}
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
winaccessibility_MSAAServiceImpl_get_implementation(
css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
{
Reference< XMSAAService > xAccMgr( new MSAAServiceImpl() );
AccessBridgeUpdateOldTopWindows( xAccMgr );
SAL_INFO("iacc2", "Created new IAccessible2 service impl.");
xAccMgr->acquire();
return xAccMgr.get();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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