/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_forms.hxx"
#include "clipboarddispatcher.hxx"
#include <editeng/editview.hxx>

/** === begin UNO includes === **/
#include <com/sun/star/lang/DisposedException.hpp>
/** === end UNO includes === **/
#include <svtools/cliplistener.hxx>
#include <svtools/transfer.hxx>

//........................................................................
namespace frm
{
//........................................................................

    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::frame;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::util;
    using namespace ::com::sun::star::beans;

	//====================================================================
    namespace
    {
        static URL createClipboardURL( OClipboardDispatcher::ClipboardFunc _eFunc )
        {
            URL aURL;
            switch ( _eFunc )
            {
            case OClipboardDispatcher::eCut:
                aURL.Complete = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( ".uno:Cut" ) );
                break;
            case OClipboardDispatcher::eCopy:
                aURL.Complete = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( ".uno:Copy" ) );
                break;
            case OClipboardDispatcher::ePaste:
                aURL.Complete = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( ".uno:Paste" ) );
                break;
            }
            return aURL;
        }
    }

	//====================================================================
	//= OClipboardDispatcher
	//====================================================================
	//--------------------------------------------------------------------
    OClipboardDispatcher::OClipboardDispatcher( EditView& _rView, ClipboardFunc _eFunc )
        :ORichTextFeatureDispatcher( _rView, createClipboardURL( _eFunc ) )
        ,m_eFunc( _eFunc )
        ,m_bLastKnownEnabled( sal_True )
    {
    }

	//--------------------------------------------------------------------
    sal_Bool OClipboardDispatcher::implIsEnabled( ) const
    {
        sal_Bool bEnabled = sal_False;
        switch ( m_eFunc )
        {
        case eCut:
            bEnabled = !getEditView()->IsReadOnly() && getEditView()->HasSelection();
            break;

        case eCopy:
            bEnabled = getEditView()->HasSelection();
            break;

        case ePaste:
            bEnabled = !getEditView()->IsReadOnly();
            break;
        }
        return bEnabled;
    }

	//--------------------------------------------------------------------
    FeatureStateEvent OClipboardDispatcher::buildStatusEvent() const
    {
        FeatureStateEvent aEvent( ORichTextFeatureDispatcher::buildStatusEvent() );
        aEvent.IsEnabled = implIsEnabled();
        return aEvent;
    }

	//--------------------------------------------------------------------
    void OClipboardDispatcher::invalidateFeatureState_Broadcast()
    {
        sal_Bool bEnabled = implIsEnabled();
        if ( m_bLastKnownEnabled == bEnabled )
            // nothing changed -> no notification
            return;
        m_bLastKnownEnabled = bEnabled;

        ORichTextFeatureDispatcher::invalidateFeatureState_Broadcast();
    }

	//--------------------------------------------------------------------
    void SAL_CALL OClipboardDispatcher::dispatch( const URL& /*_rURL*/, const Sequence< PropertyValue >& /*Arguments*/ ) throw (RuntimeException)
    {
        ::osl::MutexGuard aGuard( m_aMutex );
        if ( !getEditView() )
            throw DisposedException();

        switch ( m_eFunc )
        {
        case eCut:
            getEditView()->Cut();
            break;

        case eCopy:
            getEditView()->Copy();
            break;

        case ePaste:
            getEditView()->Paste();
            break;
        }
    }

	//====================================================================
	//= OPasteClipboardDispatcher
	//====================================================================
	//--------------------------------------------------------------------
    OPasteClipboardDispatcher::OPasteClipboardDispatcher( EditView& _rView )
        :OClipboardDispatcher( _rView, ePaste )
        ,m_pClipListener( NULL )
        ,m_bPastePossible( sal_False )
    {
        m_pClipListener = new TransferableClipboardListener( LINK( this, OPasteClipboardDispatcher, OnClipboardChanged ) );
        m_pClipListener->acquire();
		m_pClipListener->AddRemoveListener( _rView.GetWindow(), sal_True );

        // initial state
		TransferableDataHelper aDataHelper( TransferableDataHelper::CreateFromSystemClipboard( _rView.GetWindow() ) );
		m_bPastePossible = ( aDataHelper.HasFormat( SOT_FORMAT_STRING ) || aDataHelper.HasFormat( SOT_FORMAT_RTF ) );
    }

	//--------------------------------------------------------------------
    OPasteClipboardDispatcher::~OPasteClipboardDispatcher()
    {
        if ( !isDisposed() )
        {
            acquire();
            dispose();
        }
    }

	//--------------------------------------------------------------------
    IMPL_LINK( OPasteClipboardDispatcher, OnClipboardChanged, TransferableDataHelper*, _pDataHelper )
    {
        OSL_ENSURE( _pDataHelper, "OPasteClipboardDispatcher::OnClipboardChanged: ooops!" );
		m_bPastePossible = _pDataHelper->HasFormat( SOT_FORMAT_STRING )
                        || _pDataHelper->HasFormat( SOT_FORMAT_RTF );

        invalidate();

        return 0L;
    }

	//--------------------------------------------------------------------
    void OPasteClipboardDispatcher::disposing( ::osl::ClearableMutexGuard& _rClearBeforeNotify )
    {
        OSL_ENSURE( getEditView() && getEditView()->GetWindow(), "OPasteClipboardDispatcher::disposing: EditView should not (yet) be disfunctional here!" );
        if ( getEditView() && getEditView()->GetWindow() && m_pClipListener )
    		m_pClipListener->AddRemoveListener( getEditView()->GetWindow(), sal_False );
        m_pClipListener->release();
        m_pClipListener = NULL;

        OClipboardDispatcher::disposing( _rClearBeforeNotify );
    }

	//--------------------------------------------------------------------
    sal_Bool OPasteClipboardDispatcher::implIsEnabled( ) const
    {
        return m_bPastePossible && OClipboardDispatcher::implIsEnabled();
    }

//........................................................................
}   // namespace frm
//........................................................................