| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the 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 |
| //........................................................................ |
