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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svtools.hxx"
#include "svtaccessiblefactory.hxx"
#include <osl/module.h>
// #define UNLOAD_ON_LAST_CLIENT_DYING
// this is not recommended currently. If enabled, the implementation will log
// the number of active clients, and unload the acc library when the last client
// goes away.
// Sounds like a good idea, unfortunately, there's no guarantee that all objects
// implemented in this library are already dead.
// Iow, just because an object implementing an XAccessible (implemented in this lib
// here) died, it's not said that everybody released all references to the
// XAccessibleContext used by this component, and implemented in the acc lib.
// So we cannot really unload the lib.
//
// Alternatively, if the lib would us own "usage counting", i.e. every component
// implemented therein would affect a static ref count, the acc lib could care
// for unloading itself.
//........................................................................
namespace svt
{
//........................................................................
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::awt;
using namespace ::com::sun::star::accessibility;
namespace
{
#ifdef UNLOAD_ON_LAST_CLIENT_DYING
static oslInterlockedCount s_nAccessibleFactoryAccesss = 0;
#endif // UNLOAD_ON_LAST_CLIENT_DYING
static oslModule s_hAccessibleImplementationModule = NULL;
static GetSvtAccessibilityComponentFactory s_pAccessibleFactoryFunc = NULL;
static ::rtl::Reference< IAccessibleFactory > s_pFactory;
//====================================================================
//= AccessibleDummyFactory
//====================================================================
class AccessibleDummyFactory : public IAccessibleFactory
{
public:
AccessibleDummyFactory();
protected:
virtual ~AccessibleDummyFactory();
private:
AccessibleDummyFactory( const AccessibleDummyFactory& ); // never implemented
AccessibleDummyFactory& operator=( const AccessibleDummyFactory& ); // never implemented
oslInterlockedCount m_refCount;
public:
// IReference
virtual oslInterlockedCount SAL_CALL acquire();
virtual oslInterlockedCount SAL_CALL release();
// IAccessibleFactory
virtual IAccessibleTabListBox*
createAccessibleTabListBox(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*rxParent*/,
SvHeaderTabListBox& /*rBox*/
) const
{
return NULL;
}
virtual IAccessibleBrowseBox*
createAccessibleBrowseBox(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_rxParent*/,
IAccessibleTableProvider& /*_rBrowseBox*/
) const
{
return NULL;
}
virtual table::IAccessibleTableControl*
createAccessibleTableControl(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_rxParent*/,
table::IAccessibleTable& /*_rTable*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleIconChoiceCtrl(
SvtIconChoiceCtrl& /*_rIconCtrl*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_xParent*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleTabBar(
TabBar& /*_rTabBar*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >
createAccessibleTextWindowContext(
VCLXWindow* /*pVclXWindow*/, TextEngine& /*rEngine*/, TextView& /*rView*/, bool /*bCompoundControlChild*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleTreeListBox(
SvTreeListBox& /*_rListBox*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_xParent*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleBrowseBoxHeaderBar(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*rxParent*/,
IAccessibleTableProvider& /*_rOwningTable*/,
AccessibleBrowseBoxObjType /*_eObjType*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleBrowseBoxTableCell(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_rxParent*/,
IAccessibleTableProvider& /*_rBrowseBox*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow >& /*_xFocusWindow*/,
sal_Int32 /*_nRowId*/,
sal_uInt16 /*_nColId*/,
sal_Int32 /*_nOffset*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleBrowseBoxHeaderCell(
sal_Int32 /*_nColumnRowId*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*rxParent*/,
IAccessibleTableProvider& /*_rBrowseBox*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow >& /*_xFocusWindow*/,
AccessibleBrowseBoxObjType /*_eObjType*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createAccessibleCheckBoxCell(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*_rxParent*/,
IAccessibleTableProvider& /*_rBrowseBox*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow >& /*_xFocusWindow*/,
sal_Int32 /*_nRowPos*/,
sal_uInt16 /*_nColPos*/,
const TriState& /*_eState*/,
sal_Bool /*_bEnabled*/,
sal_Bool /*_bIsTriState*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
createEditBrowseBoxTableCellAccess(
const ::com::sun::star::uno::Reference< com::sun::star::accessibility::XAccessible >& /*_rxParent*/,
const ::com::sun::star::uno::Reference< com::sun::star::accessibility::XAccessible >& /*_rxControlAccessible*/,
const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow >& /*_rxFocusWindow*/,
IAccessibleTableProvider& /*_rBrowseBox*/,
sal_Int32 /*_nRowPos*/,
sal_uInt16 /*_nColPos*/
) const
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >
createAccessibleToolPanelDeck(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*i_rAccessibleParent*/,
::svt::ToolPanelDeck& /*i_rPanelDeck*/
)
{
return NULL;
}
virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >
createAccessibleToolPanelTabBar(
const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& /*i_rAccessibleParent*/,
::svt::IToolPanelDeck& /*i_rPanelDeck*/,
::svt::PanelTabBar& /*i_rTabBar*/
)
{
return NULL;
}
};
//----------------------------------------------------------------
AccessibleDummyFactory::AccessibleDummyFactory()
{
}
//----------------------------------------------------------------
AccessibleDummyFactory::~AccessibleDummyFactory()
{
}
//----------------------------------------------------------------
oslInterlockedCount SAL_CALL AccessibleDummyFactory::acquire()
{
return osl_incrementInterlockedCount( &m_refCount );
}
//----------------------------------------------------------------
oslInterlockedCount SAL_CALL AccessibleDummyFactory::release()
{
if ( 0 == osl_decrementInterlockedCount( &m_refCount ) )
{
delete this;
return 0;
}
return m_refCount;
}
}
//====================================================================
//= AccessibleFactoryAccess
//====================================================================
//--------------------------------------------------------------------
AccessibleFactoryAccess::AccessibleFactoryAccess()
:m_bInitialized( false )
{
}
//--------------------------------------------------------------------
extern "C" { static void SAL_CALL thisModule() {} }
void AccessibleFactoryAccess::ensureInitialized()
{
if ( m_bInitialized )
return;
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
#ifdef UNLOAD_ON_LAST_CLIENT_DYING
if ( 1 == osl_incrementInterlockedCount( &s_nAccessibleFactoryAccesss ) )
{ // the first client
#endif // UNLOAD_ON_LAST_CLIENT_DYING
// load the library implementing the factory
if ( !s_pFactory.get() )
{
const ::rtl::OUString sModuleName = ::rtl::OUString::createFromAscii(
SVLIBRARY( "acc" )
);
s_hAccessibleImplementationModule = osl_loadModuleRelative( &thisModule, sModuleName.pData, 0 );
if ( s_hAccessibleImplementationModule != NULL )
{
const ::rtl::OUString sFactoryCreationFunc =
::rtl::OUString::createFromAscii( "getSvtAccessibilityComponentFactory" );
s_pAccessibleFactoryFunc = (GetSvtAccessibilityComponentFactory)
osl_getFunctionSymbol( s_hAccessibleImplementationModule, sFactoryCreationFunc.pData );
}
OSL_ENSURE( s_pAccessibleFactoryFunc, "ac_registerClient: could not load the library, or not retrieve the needed symbol!" );
// get a factory instance
if ( s_pAccessibleFactoryFunc )
{
IAccessibleFactory* pFactory = static_cast< IAccessibleFactory* >( (*s_pAccessibleFactoryFunc)() );
if ( pFactory )
{
s_pFactory = pFactory;
pFactory->release();
}
}
}
if ( !s_pFactory.get() )
// the attempt to load the lib, or to create the factory, failed
// -> fall back to a dummy factory
s_pFactory = new AccessibleDummyFactory;
#ifdef UNLOAD_ON_LAST_CLIENT_DYING
}
#endif
m_bInitialized = true;
}
//--------------------------------------------------------------------
AccessibleFactoryAccess::~AccessibleFactoryAccess()
{
if ( m_bInitialized )
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
#ifdef UNLOAD_ON_LAST_CLIENT_DYING
if( 0 == osl_decrementInterlockedCount( &s_nAccessibleFactoryAccesss ) )
{
s_pFactory = NULL;
s_pAccessibleFactoryFunc = NULL;
if ( s_hAccessibleImplementationModule )
{
osl_unloadModule( s_hAccessibleImplementationModule );
s_hAccessibleImplementationModule = NULL;
}
}
#endif // UNLOAD_ON_LAST_CLIENT_DYING
}
}
//--------------------------------------------------------------------
IAccessibleFactory& AccessibleFactoryAccess::getFactory()
{
ensureInitialized();
DBG_ASSERT( s_pFactory.is(), "AccessibleFactoryAccess::getFactory: at least a dummy factory should have been created!" );
return *s_pFactory;
}
//........................................................................
} // namespace svt
//........................................................................
|
