/* -*- 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 <formfeaturedispatcher.hxx>

#include <comphelper/namedvaluecollection.hxx>

#include <utility>

#include <comphelper/diagnose_ex.hxx>

namespace svx

{

    using namespace ::com::sun::star::uno;

    using namespace ::com::sun::star::lang;

    using namespace ::com::sun::star::frame;

    using namespace ::com::sun::star::beans;

    using namespace ::com::sun::star::util;

    using namespace ::com::sun::star::form::runtime;

    OSingleFeatureDispatcher::OSingleFeatureDispatcher( URL _aFeatureURL, const sal_Int16 _nFormFeature,

            const Reference< XFormOperations >& _rxFormOperations, ::osl::Mutex& _rMutex )

        :m_rMutex( _rMutex )

        ,m_aStatusListeners( _rMutex )

        ,m_xFormOperations( _rxFormOperations )

        ,m_aFeatureURL(std::move( _aFeatureURL ))

        ,m_nFormFeature( _nFormFeature )

        ,m_bLastKnownEnabled( false )

    {

    }

    void OSingleFeatureDispatcher::getUnoState( FeatureStateEvent& /* [out] */ _rState ) const

    {

        _rState.Source = *const_cast< OSingleFeatureDispatcher* >( this );

        FeatureState aState( m_xFormOperations->getState( m_nFormFeature ) );

        _rState.FeatureURL = m_aFeatureURL;

        _rState.IsEnabled = aState.Enabled;

        _rState.Requery = false;

        _rState.State = aState.State;

    }

    void OSingleFeatureDispatcher::updateAllListeners()

    {

        ::osl::ClearableMutexGuard aGuard( m_rMutex );

        FeatureStateEvent aUnoState;

        getUnoState( aUnoState );

        if ( ( m_aLastKnownState == aUnoState.State ) && ( m_bLastKnownEnabled == bool(aUnoState.IsEnabled) ) )

            return;

        m_aLastKnownState = aUnoState.State;

        m_bLastKnownEnabled = aUnoState.IsEnabled;

        notifyStatus( nullptr, aGuard );

    }

    void OSingleFeatureDispatcher::notifyStatus( const Reference< XStatusListener >& _rxListener, ::osl::ClearableMutexGuard& _rFreeForNotification )

    {

        FeatureStateEvent aUnoState;

        getUnoState( aUnoState );

        if ( _rxListener.is() )

        {

            try

            {

                _rFreeForNotification.clear();

                _rxListener->statusChanged( aUnoState );

            }

            catch( const Exception& )

            {

                TOOLS_WARN_EXCEPTION( "svx", "OSingleFeatureDispatcher::notifyStatus" );

            }

        }

        else

        {

            ::comphelper::OInterfaceIteratorHelper3 aIter( m_aStatusListeners );

            _rFreeForNotification.clear();

            while ( aIter.hasMoreElements() )

            {

                try

                {

                    aIter.next()->statusChanged( aUnoState );

                }

                catch( const DisposedException& )

                {

                    TOOLS_WARN_EXCEPTION("svx.form",

                                         "caught a DisposedException - removing the listener!");

                    aIter.remove( );

                }

                catch( const Exception& )

                {

                    TOOLS_WARN_EXCEPTION(

                        "svx.form",

                        "caught a generic exception while notifying a single listener!");

                }

            }

        }

    }

    void SAL_CALL OSingleFeatureDispatcher::dispatch( const URL& _rURL, const Sequence< PropertyValue >& _rArguments )

    {

        ::osl::ClearableMutexGuard aGuard( m_rMutex );

        OSL_ENSURE( _rURL.Complete == m_aFeatureURL.Complete, "OSingleFeatureDispatcher::dispatch: not responsible for this URL!" );

        if ( !m_xFormOperations->isEnabled( m_nFormFeature ) )

            return;

        // release our mutex before executing the command

        sal_Int16 nFormFeature( m_nFormFeature );

        Reference< XFormOperations > xFormOperations( m_xFormOperations );

        aGuard.clear();

        try

        {

            if ( !_rArguments.hasElements() )

            {

                xFormOperations->execute( nFormFeature );

            }

            else

            {   // at the moment we only support one parameter

                ::comphelper::NamedValueCollection aArgs( _rArguments );

                xFormOperations->executeWithArguments( nFormFeature, aArgs.getNamedValues() );

            }

        }

        catch( const RuntimeException& )

        {

            throw;

        }

        catch( const Exception& )

        {

            DBG_UNHANDLED_EXCEPTION("svx");

        }

    }

    void SAL_CALL OSingleFeatureDispatcher::addStatusListener( const Reference< XStatusListener >& _rxControl, const URL& _rURL )

    {

        OSL_ENSURE( _rURL.Complete == m_aFeatureURL.Complete, "OSingleFeatureDispatcher::addStatusListener: unexpected URL!" );

        OSL_ENSURE( _rxControl.is(), "OSingleFeatureDispatcher::addStatusListener: senseless call!" );

        if ( !_rxControl.is() )

            return;

        ::osl::ClearableMutexGuard aGuard( m_rMutex );

        m_aStatusListeners.addInterface( _rxControl );

        // initially update the status

        notifyStatus( _rxControl, aGuard );

    }

    void SAL_CALL OSingleFeatureDispatcher::removeStatusListener( const Reference< XStatusListener >& _rxControl, const URL& _rURL )

    {

        OSL_ENSURE( _rURL.Complete == m_aFeatureURL.Complete, "OSingleFeatureDispatcher::removeStatusListener: unexpected URL!" );

        OSL_ENSURE( _rxControl.is(), "OSingleFeatureDispatcher::removeStatusListener: senseless call!" );

        if ( !_rxControl.is() )

            return;

        ::osl::MutexGuard aGuard( m_rMutex );

        m_aStatusListeners.removeInterface( _rxControl );

    }

}

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