Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 232 insertions, 0 deletions

diff --git a/toolkit/source/helper/accessibilityclient.cxx b/toolkit/source/helper/accessibilityclient.cxx
new file mode 100644
index 000000000..773bc9bfb
--- /dev/null
+++ b/toolkit/source/helper/accessibilityclient.cxx
@@ -0,0 +1,232 @@
+/* -*- 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 <config_wasm_strip.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
+        oslModule                                s_hAccessibleImplementationModule = nullptr;
+#endif
+#if HAVE_FEATURE_DESKTOP
+#if !ENABLE_WASM_STRIP_ACCESSIBILITY
+        GetStandardAccComponentFactory           s_pAccessibleFactoryFunc = nullptr;
+#endif
+#endif
+        ::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( SVTXNumericField* /*_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 !ENABLE_WASM_STRIP_ACCESSIBILITY
+#if HAVE_FEATURE_DESKTOP
+#ifndef DISABLE_DYNLOADING
+    extern "C" { static void thisModule() {} }
+#else
+    extern "C" void *getStandardAccessibleFactory();
+#endif
+#endif // HAVE_FEATURE_DESKTOP
+#endif // ENABLE_WASM_STRIP_ACCESSIBILITY
+
+    void AccessibilityClient::ensureInitialized()
+    {
+        if ( m_bInitialized )
+            return;
+
+        ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
+
+#if !ENABLE_WASM_STRIP_ACCESSIBILITY
+#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
+#endif // ENABLE_WASM_STRIP_ACCESSIBILITY
+
+        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: */