/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /************************************************************************* * * 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 * * for a copy of the LGPLv3 License. * ************************************************************************/ #include "svtaccessiblefactory.hxx" #include // #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_CONSTASCII_USTRINGPARAM( SVLIBRARY( "acc" ) )); s_hAccessibleImplementationModule = osl_loadModuleRelative( &thisModule, sModuleName.pData, 0 ); if ( s_hAccessibleImplementationModule != NULL ) { const ::rtl::OUString sFactoryCreationFunc( RTL_CONSTASCII_USTRINGPARAM( "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 //........................................................................ /* vim:set shiftwidth=4 softtabstop=4 expandtab: */