254 lines
10 KiB
C++
254 lines
10 KiB
C++
/*************************************************************************
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*
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* $RCSfile: imageresourceaccess.cxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: rt $ $Date: 2004-07-23 10:47:39 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifndef SVTOOLS_SOURCE_MISC_IMAGERESOURCEACCESS_HXX
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#include "imageresourceaccess.hxx"
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#endif
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/** === begin UNO includes === **/
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#ifndef _COM_SUN_STAR_IO_NOTCONNECTEDEXCEPTION_HPP_
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#include <com/sun/star/io/NotConnectedException.hpp>
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#endif
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#ifndef _COM_SUN_STAR_IO_XSEEKABLE_HPP_
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#include <com/sun/star/io/XSeekable.hpp>
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#endif
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#ifndef _COM_SUN_STAR_GRAPHIC_XGRAPHICPROVIDER_HPP_
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#include <com/sun/star/graphic/XGraphicProvider.hpp>
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#endif
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#ifndef _COM_SUN_STAR_IO_XSTREAM_HPP_
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#include <com/sun/star/io/XStream.hpp>
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#endif
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/** === end UNO includes === **/
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#ifndef _UNTOOLS_UCBSTREAMHELPER_HXX
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#include <unotools/ucbstreamhelper.hxx>
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#endif
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#ifndef _STREAM_HXX
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#include <tools/stream.hxx>
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#endif
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#ifndef _UTL_STREAM_WRAPPER_HXX_
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#include <unotools/streamwrap.hxx>
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#endif
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#ifndef _CPPUHELPER_IMPLBASE2_HXX_
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#include <cppuhelper/implbase2.hxx>
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#endif
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//........................................................................
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namespace svt
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{
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//........................................................................
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using namespace ::utl;
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using namespace ::comphelper;
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using namespace ::com::sun::star::io;
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using namespace ::com::sun::star::uno;
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using namespace ::com::sun::star::lang;
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using namespace ::com::sun::star::beans;
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using namespace ::com::sun::star::graphic;
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//====================================================================
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//= StreamSupplier
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//====================================================================
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typedef ::cppu::WeakImplHelper2 < XStream
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, XSeekable
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> StreamSupplier_Base;
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class StreamSupplier : public StreamSupplier_Base
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{
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private:
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Reference< XInputStream > m_xInput;
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Reference< XOutputStream > m_xOutput;
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Reference< XSeekable > m_xSeekable;
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public:
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StreamSupplier( const Reference< XInputStream >& _rxInput, const Reference< XOutputStream >& _rxOutput );
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protected:
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// XStream
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virtual Reference< XInputStream > SAL_CALL getInputStream( ) throw (RuntimeException);
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virtual Reference< XOutputStream > SAL_CALL getOutputStream( ) throw (RuntimeException);
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// XSeekable
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virtual void SAL_CALL seek( ::sal_Int64 location ) throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual ::sal_Int64 SAL_CALL getPosition( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual ::sal_Int64 SAL_CALL getLength( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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};
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//--------------------------------------------------------------------
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StreamSupplier::StreamSupplier( const Reference< XInputStream >& _rxInput, const Reference< XOutputStream >& _rxOutput )
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:m_xInput( _rxInput )
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,m_xOutput( _rxOutput )
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{
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m_xSeekable = m_xSeekable.query( m_xInput );
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if ( !m_xSeekable.is() )
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m_xSeekable = m_xSeekable.query( m_xOutput );
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OSL_ENSURE( m_xSeekable.is(), "StreamSupplier::StreamSupplier: at least one of both must be seekable!" );
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}
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//--------------------------------------------------------------------
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Reference< XInputStream > SAL_CALL StreamSupplier::getInputStream( ) throw (RuntimeException)
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{
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return m_xInput;
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}
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//--------------------------------------------------------------------
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Reference< XOutputStream > SAL_CALL StreamSupplier::getOutputStream( ) throw (RuntimeException)
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{
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return m_xOutput;
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}
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//--------------------------------------------------------------------
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void SAL_CALL StreamSupplier::seek( ::sal_Int64 location ) throw (IllegalArgumentException, IOException, RuntimeException)
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{
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if ( !m_xSeekable.is() )
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throw NotConnectedException();
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m_xSeekable->seek( location );
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}
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//--------------------------------------------------------------------
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::sal_Int64 SAL_CALL StreamSupplier::getPosition( ) throw (IOException, RuntimeException)
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{
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if ( !m_xSeekable.is() )
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throw NotConnectedException();
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return m_xSeekable->getPosition();
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}
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//--------------------------------------------------------------------
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::sal_Int64 SAL_CALL StreamSupplier::getLength( ) throw (IOException, RuntimeException)
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{
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if ( !m_xSeekable.is() )
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throw NotConnectedException();
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return m_xSeekable->getLength();
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}
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//====================================================================
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//= ImageResourceAccess
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//====================================================================
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//--------------------------------------------------------------------
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bool ImageResourceAccess::isImageResourceURL( const ::rtl::OUString& _rURL )
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{
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::rtl::OUString sIndicator( RTL_CONSTASCII_USTRINGPARAM( "private:resource/" ) );
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return _rURL.indexOf( sIndicator ) == 0;
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}
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//--------------------------------------------------------------------
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SvStream* ImageResourceAccess::getImageStream( const Reference< XMultiServiceFactory >& _rxORB, const ::rtl::OUString& _rImageResourceURL )
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{
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SvStream* pReturn = NULL;
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try
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{
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// get a GraphicProvider
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Reference< XGraphicProvider > xProvider;
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if ( _rxORB.is() )
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xProvider = xProvider.query( _rxORB->createInstance( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.graphic.GraphicProvider" ) ) ) );
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OSL_ENSURE( xProvider.is(), "ImageResourceAccess::getImageStream: could not create a graphic provider!" );
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if ( !xProvider.is() )
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return pReturn;
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// let it create a graphic from the given URL
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Sequence< PropertyValue > aMediaProperties( 1 );
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aMediaProperties[0].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "URL" ) );
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aMediaProperties[0].Value <<= _rImageResourceURL;
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Reference< XGraphic > xGraphic( xProvider->queryGraphic( aMediaProperties ) );
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OSL_ENSURE( xGraphic.is(), "ImageResourceAccess::getImageStream: the provider did not give us a graphic object!" );
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if ( !xGraphic.is() )
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return pReturn;
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// copy the graphic to a in-memory buffer
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SvMemoryStream* pMemBuffer = new SvMemoryStream;
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Reference< XStream > xBufferAccess = new StreamSupplier(
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new OSeekableInputStreamWrapper( *pMemBuffer ),
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new OSeekableOutputStreamWrapper( *pMemBuffer )
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);
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aMediaProperties.realloc( 2 );
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aMediaProperties[0].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "OutputStream" ) );
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aMediaProperties[0].Value <<= xBufferAccess;
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aMediaProperties[1].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "MimeType" ) );
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aMediaProperties[1].Value <<= ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "image/png" ) );
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xProvider->storeGraphic( xGraphic, aMediaProperties );
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pMemBuffer->Seek( 0 );
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pReturn = pMemBuffer;
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}
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catch( const Exception& )
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{
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OSL_ENSURE( sal_False, "ImageResourceAccess::getImageStream: caught an exception!" );
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}
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return pReturn;
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}
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//--------------------------------------------------------------------
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Reference< XInputStream > ImageResourceAccess::getImageXStream( const Reference< XMultiServiceFactory >& _rxORB, const ::rtl::OUString& _rImageResourceURL )
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{
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return new OSeekableInputStreamWrapper( getImageStream( _rxORB, _rImageResourceURL ), sal_True ); // take ownership
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}
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//........................................................................
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} // namespace svt
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//........................................................................
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