# Cppcheck report - LibreOffice: framework/source/uifactory/uielementfactorymanager.cxx

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    /* -*- 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 <sal/config.h>

    #include <uifactory/configurationaccessfactorymanager.hxx>
    #include <helper/mischelper.hxx>

    #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/container/XContainer.hpp>
    #include <com/sun/star/container/XContainerListener.hpp>
    #include <com/sun/star/lang/XServiceInfo.hpp>
    #include <com/sun/star/loader/CannotActivateFactoryException.hpp>
    #include <com/sun/star/frame/ModuleManager.hpp>
    #include <com/sun/star/frame/XFrame.hpp>
    #include <com/sun/star/frame/XModuleManager2.hpp>
    #include <com/sun/star/ui/XUIElementFactoryManager.hpp>

    #include <rtl/ustrbuf.hxx>
    #include <cppuhelper/basemutex.hxx>
    #include <cppuhelper/compbase2.hxx>
    #include <cppuhelper/supportsservice.hxx>
    #include <vcl/svapp.hxx>

    using namespace com::sun::star::uno;
    using namespace com::sun::star::lang;
    using namespace com::sun::star::beans;
    using namespace com::sun::star::frame;
    using namespace com::sun::star::configuration;
    using namespace com::sun::star::container;
    using namespace ::com::sun::star::ui;
    using namespace ::com::sun::star::frame;
    using namespace framework;

    namespace framework
    {

    // global function needed by both implementations
    static OUString getHashKeyFromStrings( const OUString& aType, const OUString& aName, const OUString& aModuleName )
    {
        OUStringBuffer aKey( aType );
        aKey.appendAscii( "^" );
        aKey.append( aName );
        aKey.appendAscii( "^" );
        aKey.append( aModuleName );
        return aKey.makeStringAndClear();
    }

    ConfigurationAccess_FactoryManager::ConfigurationAccess_FactoryManager( const Reference< XComponentContext >& rxContext, const OUString& _sRoot ) :
        m_aPropType( "Type" ),
        m_aPropName( "Name" ),
        m_aPropModule( "Module" ),
        m_aPropFactory( "FactoryImplementation" ),
        m_sRoot(_sRoot),
        m_bConfigAccessInitialized( false )
    {
        m_xConfigProvider = theDefaultProvider::get( rxContext );
    }

    ConfigurationAccess_FactoryManager::~ConfigurationAccess_FactoryManager()
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        Reference< XContainer > xContainer( m_xConfigAccess, UNO_QUERY );
        if ( xContainer.is() )
            xContainer->removeContainerListener(m_xConfigListener);
    }

    OUString ConfigurationAccess_FactoryManager::getFactorySpecifierFromTypeNameModule( const OUString& rType, const OUString& rName, const OUString& rModule ) const
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        FactoryManagerMap::const_iterator pIter =
            m_aFactoryManagerMap.find( getHashKeyFromStrings( rType, rName, rModule ));
        if ( pIter != m_aFactoryManagerMap.end() )
            return pIter->second;
        else
        {
            pIter = m_aFactoryManagerMap.find( getHashKeyFromStrings( rType, rName, OUString() ));
            if ( pIter != m_aFactoryManagerMap.end() )
                return pIter->second;
            else
            {
                // Support factories which uses a defined prefix before the ui name.
                sal_Int32 nIndex = rName.indexOf( '_' );
                if ( nIndex > 0 )
                {
                    OUString aName = rName.copy( 0, nIndex+1 );
                    pIter = m_aFactoryManagerMap.find( getHashKeyFromStrings( rType, aName, OUString() ));
                    if ( pIter != m_aFactoryManagerMap.end() )
                        return pIter->second;
                }

                pIter = m_aFactoryManagerMap.find( getHashKeyFromStrings( rType, OUString(), OUString() ));
                if ( pIter != m_aFactoryManagerMap.end() )
                    return pIter->second;
            }
        }

        return OUString();
    }

    void ConfigurationAccess_FactoryManager::addFactorySpecifierToTypeNameModule( const OUString& rType, const OUString& rName, const OUString& rModule, const OUString& rServiceSpecifier )
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        OUString aHashKey = getHashKeyFromStrings( rType, rName, rModule );

        FactoryManagerMap::const_iterator pIter = m_aFactoryManagerMap.find( aHashKey );

        if ( pIter != m_aFactoryManagerMap.end() )
            throw ElementExistException();
        else
            m_aFactoryManagerMap.insert( FactoryManagerMap::value_type( aHashKey, rServiceSpecifier ));
    }

    void ConfigurationAccess_FactoryManager::removeFactorySpecifierFromTypeNameModule( const OUString& rType, const OUString& rName, const OUString& rModule )
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        OUString aHashKey = getHashKeyFromStrings( rType, rName, rModule );

        FactoryManagerMap::const_iterator pIter = m_aFactoryManagerMap.find( aHashKey );

        if ( pIter == m_aFactoryManagerMap.end() )
            throw NoSuchElementException();
        else
            m_aFactoryManagerMap.erase( aHashKey );
    }

    Sequence< Sequence< PropertyValue > > ConfigurationAccess_FactoryManager::getFactoriesDescription() const
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        Sequence< Sequence< PropertyValue > > aSeqSeq;

        sal_Int32 nIndex( 0 );
        FactoryManagerMap::const_iterator pIter = m_aFactoryManagerMap.begin();
        while ( pIter != m_aFactoryManagerMap.end() )
        {
            OUString aFactory = pIter->first;
            if ( !aFactory.isEmpty() )
            {
                sal_Int32                 nToken = 0;
                Sequence< PropertyValue > aSeq( 1 );

                aSeqSeq.realloc( aSeqSeq.getLength() + 1 );
                aSeq[0].Name  = m_aPropType;
                aSeq[0].Value = makeAny( aFactory.getToken( 0, '^', nToken ));
                if ( nToken > 0 )
                {
                    aSeq.realloc( 2 );
                    aSeq[1].Name  = m_aPropName;
                    aSeq[1].Value = makeAny( aFactory.getToken( 0, '^', nToken ));
                    if ( nToken > 0 )
                    {
                        aSeq.realloc( 3 );
                        aSeq[2].Name  = m_aPropModule;
                        aSeq[2].Value = makeAny( aFactory.getToken( 0, '^', nToken ));
                    }
                }

                aSeqSeq[nIndex++] = aSeq;
            }

            ++pIter;
        }

        return aSeqSeq;
    }

    // container.XContainerListener
    void SAL_CALL ConfigurationAccess_FactoryManager::elementInserted( const ContainerEvent& aEvent ) throw(RuntimeException, std::exception)
    {
        OUString   aType;
        OUString   aName;
        OUString   aModule;
        OUString   aService;

        // SAFE
        osl::MutexGuard g(m_aMutex);

        if ( impl_getElementProps( aEvent.Element, aType, aName, aModule, aService ))
        {
            // Create hash key from type, name and module as they are together a primary key to
            // the UNO service that implements a user interface factory.
            OUString aHashKey( getHashKeyFromStrings( aType, aName, aModule ));
            m_aFactoryManagerMap.insert( FactoryManagerMap::value_type( aHashKey, aService ));
        }
    }

    void SAL_CALL ConfigurationAccess_FactoryManager::elementRemoved ( const ContainerEvent& aEvent ) throw(RuntimeException, std::exception)
    {
        OUString   aType;
        OUString   aName;
        OUString   aModule;
        OUString   aService;

        // SAFE
        osl::MutexGuard g(m_aMutex);

        if ( impl_getElementProps( aEvent.Element, aType, aName, aModule, aService ))
        {
            // Create hash key from command and model as they are together a primary key to
            // the UNO service that implements the popup menu controller.
            OUString aHashKey( getHashKeyFromStrings( aType, aName, aModule ));
            m_aFactoryManagerMap.erase( aHashKey );
        }
    }

    void SAL_CALL ConfigurationAccess_FactoryManager::elementReplaced( const ContainerEvent& aEvent ) throw(RuntimeException, std::exception)
    {
        OUString   aType;
        OUString   aName;
        OUString   aModule;
        OUString   aService;

        // SAFE
        osl::MutexGuard g(m_aMutex);

        if ( impl_getElementProps( aEvent.Element, aType, aName, aModule, aService ))
        {
            // Create hash key from command and model as they are together a primary key to
            // the UNO service that implements the popup menu controller.
            OUString aHashKey( getHashKeyFromStrings( aType, aName, aModule ));
            m_aFactoryManagerMap.erase( aHashKey );
            m_aFactoryManagerMap.insert( FactoryManagerMap::value_type( aHashKey, aService ));
        }
    }

    // lang.XEventListener
    void SAL_CALL ConfigurationAccess_FactoryManager::disposing( const EventObject& ) throw(RuntimeException, std::exception)
    {
        // SAFE
        // remove our reference to the config access
        osl::MutexGuard g(m_aMutex);
        m_xConfigAccess.clear();
    }

    void ConfigurationAccess_FactoryManager::readConfigurationData()
    {
        // SAFE
        osl::MutexGuard g(m_aMutex);

        if ( !m_bConfigAccessInitialized )
        {
            Sequence< Any > aArgs( 1 );
            PropertyValue   aPropValue;

            aPropValue.Name  = "nodepath";
            aPropValue.Value <<= m_sRoot;
            aArgs[0] <<= aPropValue;

            try
            {
                m_xConfigAccess.set( m_xConfigProvider->createInstanceWithArguments(
                            "com.sun.star.configuration.ConfigurationAccess", aArgs ), UNO_QUERY );
            }
            catch ( const WrappedTargetException& )
            {
            }

            m_bConfigAccessInitialized = true;
        }

        if ( m_xConfigAccess.is() )
        {
            Sequence< OUString >   aUIElementFactories = m_xConfigAccess->getElementNames();

            OUString             aType;
            OUString             aName;
            OUString             aModule;
            OUString             aService;
            OUString             aHashKey;
            Reference< XPropertySet > xPropertySet;
            for ( sal_Int32 i = 0; i < aUIElementFactories.getLength(); i++ )
            {
                if ( impl_getElementProps( m_xConfigAccess->getByName( aUIElementFactories[i] ), aType, aName, aModule, aService ))
                {
                    // Create hash key from type, name and module as they are together a primary key to
                    // the UNO service that implements the user interface element factory.
                    aHashKey = getHashKeyFromStrings( aType, aName, aModule );
                    m_aFactoryManagerMap.insert( FactoryManagerMap::value_type( aHashKey, aService ));
                }
            }

            Reference< XContainer > xContainer( m_xConfigAccess, UNO_QUERY );
            if ( xContainer.is() )
            {
                m_xConfigListener = new WeakContainerListener(this);
                xContainer->addContainerListener(m_xConfigListener);
            }
        }
    }

    bool ConfigurationAccess_FactoryManager::impl_getElementProps( const Any& aElement, OUString& rType, OUString& rName, OUString& rModule, OUString& rServiceSpecifier ) const
    {
        Reference< XPropertySet > xPropertySet;
        aElement >>= xPropertySet;

        if ( xPropertySet.is() )
        {
            try
            {
                xPropertySet->getPropertyValue( m_aPropType ) >>= rType;
                xPropertySet->getPropertyValue( m_aPropName ) >>= rName;
                xPropertySet->getPropertyValue( m_aPropModule ) >>= rModule;
                xPropertySet->getPropertyValue( m_aPropFactory ) >>= rServiceSpecifier;
            }
            catch ( const com::sun::star::beans::UnknownPropertyException& )
            {
                return false;
            }
            catch ( const com::sun::star::lang::WrappedTargetException& )
            {
                return false;
            }
        }

        return true;
    }

    } // framework

    namespace {

    typedef ::cppu::WeakComponentImplHelper2<
        css::lang::XServiceInfo,
        css::ui::XUIElementFactoryManager> UIElementFactoryManager_BASE;

    class UIElementFactoryManager : private cppu::BaseMutex,
                                    public UIElementFactoryManager_BASE
    {
        virtual void SAL_CALL disposing() SAL_OVERRIDE;
    public:
        UIElementFactoryManager( const css::uno::Reference< css::uno::XComponentContext >& rxContext );
        virtual ~UIElementFactoryManager();

        virtual OUString SAL_CALL getImplementationName()
            throw (css::uno::RuntimeException, std::exception) SAL_OVERRIDE
        {
            return OUString("com.sun.star.comp.framework.UIElementFactoryManager");
        }

        virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName)
            throw (css::uno::RuntimeException, std::exception) SAL_OVERRIDE
        {
            return cppu::supportsService(this, ServiceName);
        }

        virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames()
            throw (css::uno::RuntimeException, std::exception) SAL_OVERRIDE
        {
            css::uno::Sequence< OUString > aSeq(1);
            aSeq[0] = "com.sun.star.ui.UIElementFactoryManager";
            return aSeq;
        }

        // XUIElementFactory
        virtual css::uno::Reference< css::ui::XUIElement > SAL_CALL createUIElement( const OUString& ResourceURL, const css::uno::Sequence< css::beans::PropertyValue >& Args ) throw (css::container::NoSuchElementException, css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) SAL_OVERRIDE;

        // XUIElementFactoryRegistration
        virtual css::uno::Sequence< css::uno::Sequence< css::beans::PropertyValue > > SAL_CALL getRegisteredFactories(  ) throw (css::uno::RuntimeException, std::exception) SAL_OVERRIDE;
        virtual css::uno::Reference< css::ui::XUIElementFactory > SAL_CALL getFactory( const OUString& ResourceURL, const OUString& ModuleIdentifier ) throw (css::uno::RuntimeException, std::exception) SAL_OVERRIDE;
        virtual void SAL_CALL registerFactory( const OUString& aType, const OUString& aName, const OUString& aModuleIdentifier, const OUString& aFactoryImplementationName ) throw (css::container::ElementExistException, css::uno::RuntimeException, std::exception) SAL_OVERRIDE;
        virtual void SAL_CALL deregisterFactory( const OUString& aType, const OUString& aName, const OUString& aModuleIdentifier ) throw (css::container::NoSuchElementException, css::uno::RuntimeException, std::exception) SAL_OVERRIDE;

    private:
        bool                                                  m_bConfigRead;
        css::uno::Reference< css::uno::XComponentContext >        m_xContext;
        ConfigurationAccess_FactoryManager*                       m_pConfigAccess;
    };

    UIElementFactoryManager::UIElementFactoryManager( const Reference< XComponentContext >& rxContext ) :
        UIElementFactoryManager_BASE(m_aMutex),
        m_bConfigRead( false ),
        m_xContext(rxContext)
    {
        m_pConfigAccess = new ConfigurationAccess_FactoryManager(rxContext,
                "/org.openoffice.Office.UI.Factories/Registered/UIElementFactories");
        m_pConfigAccess->acquire();
    }

    UIElementFactoryManager::~UIElementFactoryManager()
    {
        disposing();
    }

    void SAL_CALL UIElementFactoryManager::disposing()
    {
        osl::MutexGuard g(rBHelper.rMutex);
        if (m_pConfigAccess)
        {
            // reduce reference count
            m_pConfigAccess->release();
            m_pConfigAccess = 0;
        }
    }

    // XUIElementFactory
    Reference< XUIElement > SAL_CALL UIElementFactoryManager::createUIElement(
        const OUString& ResourceURL,
        const Sequence< PropertyValue >& Args )
    throw ( ::com::sun::star::container::NoSuchElementException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException, std::exception )
    {
        Reference< XFrame > xFrame;
        { // SAFE
        osl::MutexGuard g(rBHelper.rMutex);

        if ( !m_bConfigRead )
        {
            m_bConfigRead = true;
            m_pConfigAccess->readConfigurationData();
        }

        // Retrieve the frame instance from the arguments to determine the module identifier. This must be provided
        // to the search function. An empty module identifier is provided if the frame is missing or the module id cannot
        // retrieve from it.
        for ( int i = 0; i < Args.getLength(); i++ )
        {
            if ( Args[i].Name == "Frame")
                Args[i].Value >>= xFrame;
        }
        } // SAFE

        Reference< XModuleManager2 > xManager = ModuleManager::create( m_xContext );

        // Determine the module identifier
        try
        {
            OUString aModuleId;
            if ( xFrame.is() && xManager.is() )
                aModuleId = xManager->identify( Reference<XInterface>( xFrame, UNO_QUERY ) );

            Reference< XUIElementFactory > xUIElementFactory = getFactory( ResourceURL, aModuleId );
            if ( xUIElementFactory.is() )
                return xUIElementFactory->createUIElement( ResourceURL, Args );
        }
        catch ( const UnknownModuleException& )
        {
        }

        throw NoSuchElementException();
    }

    // XUIElementFactoryRegistration
    Sequence< Sequence< PropertyValue > > SAL_CALL UIElementFactoryManager::getRegisteredFactories()
    throw ( RuntimeException, std::exception )
    {
        // SAFE
        osl::MutexGuard g(rBHelper.rMutex);

        if ( !m_bConfigRead )
        {
            m_bConfigRead = true;
            m_pConfigAccess->readConfigurationData();
        }

        return m_pConfigAccess->getFactoriesDescription();
    }

    Reference< XUIElementFactory > SAL_CALL UIElementFactoryManager::getFactory( const OUString& aResourceURL, const OUString& aModuleId )
    throw ( RuntimeException, std::exception )
    {
        OUString aServiceSpecifier;
        { // SAFE
        osl::MutexGuard g(rBHelper.rMutex);

        if ( !m_bConfigRead )
        {
            m_bConfigRead = true;
            m_pConfigAccess->readConfigurationData();
        }

        OUString aType;
        OUString aName;

        RetrieveTypeNameFromResourceURL( aResourceURL, aType, aName );

        aServiceSpecifier = m_pConfigAccess->getFactorySpecifierFromTypeNameModule( aType, aName, aModuleId );
        } // SAFE

        if ( !aServiceSpecifier.isEmpty() ) try
        {
            return Reference< XUIElementFactory >(m_xContext->getServiceManager()->
                    createInstanceWithContext(aServiceSpecifier, m_xContext), UNO_QUERY);
        }
        catch ( const css::loader::CannotActivateFactoryException& )
        {
            SAL_WARN("fwk.uielement", aServiceSpecifier <<
                    " not available. This should happen only on mobile platforms.");
        }
        return Reference< XUIElementFactory >();
    }

    void SAL_CALL UIElementFactoryManager::registerFactory( const OUString& aType, const OUString& aName, const OUString& aModuleId, const OUString& aFactoryImplementationName )
    throw ( ElementExistException, RuntimeException, std::exception )
    {
        // SAFE
        osl::MutexGuard g(rBHelper.rMutex);

        if ( !m_bConfigRead )
        {
            m_bConfigRead = true;
            m_pConfigAccess->readConfigurationData();
        }

        m_pConfigAccess->addFactorySpecifierToTypeNameModule( aType, aName, aModuleId, aFactoryImplementationName );
        // SAFE
    }

    void SAL_CALL UIElementFactoryManager::deregisterFactory( const OUString& aType, const OUString& aName, const OUString& aModuleId )
    throw ( NoSuchElementException, RuntimeException, std::exception )
    {
        // SAFE
        osl::MutexGuard g(rBHelper.rMutex);

        if ( !m_bConfigRead )
        {
            m_bConfigRead = true;
            m_pConfigAccess->readConfigurationData();
        }

        m_pConfigAccess->removeFactorySpecifierFromTypeNameModule( aType, aName, aModuleId );
        // SAFE
    }

    struct Instance {
        explicit Instance(
            css::uno::Reference<css::uno::XComponentContext> const & context):
            instance(static_cast<cppu::OWeakObject *>(
                        new UIElementFactoryManager(context)))
        {
        }

        css::uno::Reference<css::uno::XInterface> instance;
    };

    struct Singleton:
        public rtl::StaticWithArg<
            Instance, css::uno::Reference<css::uno::XComponentContext>, Singleton>
    {};

    }

    extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface * SAL_CALL
    com_sun_star_comp_framework_UIElementFactoryManager_get_implementation(<--- The function 'com_sun_star_comp_framework_UIElementFactoryManager_get_implementation' is never used.
        css::uno::XComponentContext *context,
        css::uno::Sequence<css::uno::Any> const &)
    {
        return cppu::acquire(static_cast<cppu::OWeakObject *>(
                Singleton::get(context).instance.get()));
    }

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