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| -rw-r--r-- | toolkit/source/helper/accessibilityclient.cxx | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/toolkit/source/helper/accessibilityclient.cxx b/toolkit/source/helper/accessibilityclient.cxx new file mode 100644 index 000000000..682354607 --- /dev/null +++ b/toolkit/source/helper/accessibilityclient.cxx @@ -0,0 +1,220 @@ +/* -*- 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 <config_feature_desktop.h> + +#include <sal/config.h> + +#include <toolkit/helper/accessiblefactory.hxx> +#include <osl/module.h> +#include <osl/diagnose.h> +#include <osl/mutex.hxx> +#include <rtl/ref.hxx> +#include <tools/svlibrary.h> + +#include <helper/accessibilityclient.hxx> + +namespace toolkit +{ + using namespace ::com::sun::star::uno; + using namespace ::com::sun::star::accessibility; + + namespace + { +#ifndef DISABLE_DYNLOADING + static oslModule s_hAccessibleImplementationModule = nullptr; +#endif +#if HAVE_FEATURE_DESKTOP + static GetStandardAccComponentFactory s_pAccessibleFactoryFunc = nullptr; +#endif + static ::rtl::Reference< IAccessibleFactory > s_pFactory; + } + + + //= AccessibleDummyFactory + + namespace { + + class AccessibleDummyFactory: + public IAccessibleFactory + { + public: + AccessibleDummyFactory(); + AccessibleDummyFactory(const AccessibleDummyFactory&) = delete; + AccessibleDummyFactory& operator=(const AccessibleDummyFactory&) = delete; + + protected: + virtual ~AccessibleDummyFactory() override; + + public: + // IAccessibleFactory + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXButton* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXCheckBox* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXRadioButton* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXListBox* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXFixedHyperlink* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXFixedText* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXScrollBar* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXEdit* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXComboBox* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXToolBox* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXHeaderBar* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessibleContext > + createAccessibleContext( VCLXWindow* /*_pXWindow*/ ) override + { + return nullptr; + } + css::uno::Reference< css::accessibility::XAccessible > + createAccessible( Menu* /*_pMenu*/, bool /*_bIsMenuBar*/ ) override + { + return nullptr; + } + }; + + } + + AccessibleDummyFactory::AccessibleDummyFactory() + { + } + + + AccessibleDummyFactory::~AccessibleDummyFactory() + { + } + + + //= AccessibilityClient + + + AccessibilityClient::AccessibilityClient() + :m_bInitialized( false ) + { + } + +#if HAVE_FEATURE_DESKTOP +#ifndef DISABLE_DYNLOADING + extern "C" { static void thisModule() {} } +#else + extern "C" void *getStandardAccessibleFactory(); +#endif +#endif // HAVE_FEATURE_DESKTOP + + void AccessibilityClient::ensureInitialized() + { + if ( m_bInitialized ) + return; + + ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() ); + +#if HAVE_FEATURE_DESKTOP + // load the library implementing the factory + if (!s_pFactory) + { +#ifndef DISABLE_DYNLOADING + const OUString sModuleName( SVLIBRARY( "acc" ) ); + s_hAccessibleImplementationModule = osl_loadModuleRelative( &thisModule, sModuleName.pData, 0 ); + if ( s_hAccessibleImplementationModule != nullptr ) + { + const OUString sFactoryCreationFunc("getStandardAccessibleFactory"); + s_pAccessibleFactoryFunc = reinterpret_cast<GetStandardAccComponentFactory>( + osl_getFunctionSymbol( s_hAccessibleImplementationModule, sFactoryCreationFunc.pData )); + + } + OSL_ENSURE( s_pAccessibleFactoryFunc, "AccessibilityClient::ensureInitialized: could not load the library, or not retrieve the needed symbol!" ); +#else + s_pAccessibleFactoryFunc = getStandardAccessibleFactory; +#endif // DISABLE_DYNLOADING + + // get a factory instance + if ( s_pAccessibleFactoryFunc ) + { + IAccessibleFactory* pFactory = static_cast< IAccessibleFactory* >( (*s_pAccessibleFactoryFunc)() ); + OSL_ENSURE( pFactory, "AccessibilityClient::ensureInitialized: no factory provided by the A11Y lib!" ); + if ( pFactory ) + { + s_pFactory = pFactory; + pFactory->release(); + } + } + } +#endif // HAVE_FEATURE_DESKTOP + + if (!s_pFactory) + // the attempt to load the lib, or to create the factory, failed + // -> fall back to a dummy factory + s_pFactory = new AccessibleDummyFactory; + + m_bInitialized = true; + } + + IAccessibleFactory& AccessibilityClient::getFactory() + { + ensureInitialized(); + OSL_ENSURE( s_pFactory.is(), "AccessibilityClient::getFactory: at least a dummy factory should have been created!" ); + return *s_pFactory; + } + + +} // namespace toolkit + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |