    /* -*- 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 "imestatuswindow.hxx"

    #include <sfx2/app.hxx>
    #include <sfx2/sfxsids.hrc>

    #include <com/sun/star/beans/PropertyState.hpp>
    #include <com/sun/star/beans/PropertyValue.hpp>
    #include <com/sun/star/beans/XPropertySet.hpp>
    #include <com/sun/star/configuration/theDefaultProvider.hpp>
    #include <com/sun/star/lang/DisposedException.hpp>
    #include <com/sun/star/lang/XMultiServiceFactory.hpp>
    #include <com/sun/star/uno/Any.hxx>
    #include <com/sun/star/uno/Exception.hpp>
    #include <com/sun/star/uno/Reference.hxx>
    #include <com/sun/star/uno/RuntimeException.hpp>
    #include <com/sun/star/uno/Sequence.hxx>
    #include <com/sun/star/util/XChangesBatch.hpp>
    #include <osl/diagnose.h>
    #include <osl/mutex.hxx>
    #include <rtl/ustring.h>
    #include <rtl/ustring.hxx>
    #include <sal/types.h>
    #include <vcl/svapp.hxx>
    #include <cppuhelper/implbase.hxx>
    #include <cppuhelper/weakref.hxx>

    //TO-Do, merge into framework/inc/helpers/mischelpers.hxx and deliver
    class WeakPropertyChangeListener : public ::cppu::WeakImplHelper<css::beans::XPropertyChangeListener>
    {
        private:
            css::uno::WeakReference<css::beans::XPropertyChangeListener> mxOwner;

        public:
            explicit WeakPropertyChangeListener(css::uno::Reference<css::beans::XPropertyChangeListener> const & xOwner)
                : mxOwner(xOwner)
            {
            }

            virtual void SAL_CALL propertyChange(const css::beans::PropertyChangeEvent &rEvent ) override
            {
                css::uno::Reference<css::beans::XPropertyChangeListener> xOwner(mxOwner.get(),
                    css::uno::UNO_QUERY);
                if (xOwner.is())
                    xOwner->propertyChange(rEvent);

            }

            // lang.XEventListener
            virtual void SAL_CALL disposing(const css::lang::EventObject& rEvent) override
            {
                css::uno::Reference<css::beans::XPropertyChangeListener> xOwner(mxOwner.get(),
                    css::uno::UNO_QUERY);
                if (xOwner.is())
                    xOwner->disposing(rEvent);

            }
    };

    using sfx2::appl::ImeStatusWindow;

    ImeStatusWindow::ImeStatusWindow(
        css::uno::Reference< css::uno::XComponentContext > const & rxContext):
        m_xContext(rxContext),
        m_bDisposed(false)
    {}

    void ImeStatusWindow::init()
    {
        if (Application::CanToggleImeStatusWindow())
            try
            {
                bool bShow;
                if (getConfig()->getPropertyValue("ShowStatusWindow") >>= bShow)
                    Application::ShowImeStatusWindow(bShow);
            }
            catch (css::uno::Exception &)
            {
                OSL_FAIL("com.sun.star.uno.Exception");
                // Degrade gracefully and use the VCL-supplied default if no
                // configuration is available.
            }
    }

    bool ImeStatusWindow::isShowing()
    {
        try
        {
            bool bShow(false);
            if (getConfig()->getPropertyValue("ShowStatusWindow") >>= bShow)
                return bShow;
        }
        catch (css::uno::Exception &)
        {
            OSL_FAIL("com.sun.star.uno.Exception");
            // Degrade gracefully and use the VCL-supplied default if no
            // configuration is available.
        }
        return Application::GetShowImeStatusWindowDefault();
    }

    void ImeStatusWindow::show(bool bShow)
    {
        try
        {
            css::uno::Reference< css::beans::XPropertySet > xConfig(getConfig());
            xConfig->setPropertyValue(
                "ShowStatusWindow",
                css::uno::makeAny(bShow));
            css::uno::Reference< css::util::XChangesBatch > xCommit(
                xConfig, css::uno::UNO_QUERY);
            // Degrade gracefully by not saving the settings permanently:
            if (xCommit.is())
                xCommit->commitChanges();
            // Alternatively, setting the VCL status could be done even if updating
            // the configuration failed:
            Application::ShowImeStatusWindow(bShow);
        }
        catch (css::uno::Exception &)
        {
            OSL_FAIL("com.sun.star.uno.Exception");
        }
    }

    bool ImeStatusWindow::canToggle()
    {
        return Application::CanToggleImeStatusWindow();
    }

    ImeStatusWindow::~ImeStatusWindow()
    {
        if (m_xConfig.is() && m_xConfigListener.is())
            // We should never get here, but just in case...
            try
            {
                m_xConfig->removePropertyChangeListener(
                    "ShowStatusWindow",
                    m_xConfigListener);
            }
            catch (css::uno::Exception &)
            {
                OSL_FAIL("com.sun.star.uno.RuntimeException");
            }
    }

    void SAL_CALL ImeStatusWindow::disposing(css::lang::EventObject const & )
    {
        osl::MutexGuard aGuard(m_aMutex);
        m_xConfig = nullptr;
        m_bDisposed = true;
    }

    void SAL_CALL
    ImeStatusWindow::propertyChange(css::beans::PropertyChangeEvent const & )
    {
        SolarMutexGuard aGuard;
        SfxApplication* pApp = SfxApplication::Get();
        if (pApp)
        pApp->Invalidate(SID_SHOW_IME_STATUS_WINDOW);
    }

    css::uno::Reference< css::beans::XPropertySet > ImeStatusWindow::getConfig()
    {
        css::uno::Reference< css::beans::XPropertySet > xConfig;
        bool bAdd = false;
        {
            osl::MutexGuard aGuard(m_aMutex);
            if (!m_xConfig.is())
            {
                if (m_bDisposed)
                    throw css::lang::DisposedException();
                if (!m_xContext.is())
                    throw css::uno::RuntimeException(
                        "null comphelper::getProcessServiceFactory",
                        nullptr);
                css::uno::Reference< css::lang::XMultiServiceFactory > xProvider =
                    css::configuration::theDefaultProvider::get( m_xContext );
                css::beans::PropertyValue aArg(
                    "nodepath", -1,
                    css::uno::makeAny(
                        OUString(
                                "/org.openoffice.Office.Common/I18N/InputMethod")),
                    css::beans::PropertyState_DIRECT_VALUE);
                css::uno::Sequence< css::uno::Any > aArgs(1);
                aArgs[0] <<= aArg;
                m_xConfig.set(
                        xProvider->createInstanceWithArguments(
                            "com.sun.star.configuration.ConfigurationUpdateAccess",
                            aArgs),
                        css::uno::UNO_QUERY_THROW);
                bAdd = true;
            }
            xConfig = m_xConfig;
        }
        if (bAdd)
        {
            // Exceptions here could be handled individually, to support graceful
            // degradation (no update notification mechanism in this case---but also
            // no dispose notifications):
            m_xConfigListener = new WeakPropertyChangeListener(this);
            xConfig->addPropertyChangeListener(
                "ShowStatusWindow",
                m_xConfigListener);
        }
        return xConfig;
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

↑ V614 Uninitialized variable 'bShow' used. Consider checking the first actual argument of the 'ShowImeStatusWindow' function.