194 lines
6.9 KiB
C++
194 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <svtools/imageresourceaccess.hxx>
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#include <com/sun/star/io/NotConnectedException.hpp>
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#include <com/sun/star/io/XSeekable.hpp>
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#include <com/sun/star/graphic/GraphicProvider.hpp>
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#include <com/sun/star/graphic/XGraphicProvider.hpp>
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#include <com/sun/star/io/XStream.hpp>
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#include <osl/diagnose.h>
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#include <unotools/ucbstreamhelper.hxx>
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#include <tools/stream.hxx>
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#include <unotools/streamwrap.hxx>
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#include <cppuhelper/implbase.hxx>
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#include <comphelper/processfactory.hxx>
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namespace svt
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{
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using namespace ::utl;
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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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//= StreamSupplier
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typedef ::cppu::WeakImplHelper < 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, std::exception) override;
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virtual Reference< XOutputStream > SAL_CALL getOutputStream( ) throw (RuntimeException, std::exception) override;
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// XSeekable
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virtual void SAL_CALL seek( ::sal_Int64 location ) throw (css::lang::IllegalArgumentException, css::io::IOException, css::uno::RuntimeException, std::exception) override;
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virtual ::sal_Int64 SAL_CALL getPosition( ) throw (css::io::IOException, css::uno::RuntimeException, std::exception) override;
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virtual ::sal_Int64 SAL_CALL getLength( ) throw (css::io::IOException, css::uno::RuntimeException, std::exception) override;
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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.set(m_xInput, css::uno::UNO_QUERY);
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if ( !m_xSeekable.is() )
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m_xSeekable.set(m_xOutput, css::uno::UNO_QUERY);
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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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Reference< XInputStream > SAL_CALL StreamSupplier::getInputStream( ) throw (RuntimeException, std::exception)
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{
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return m_xInput;
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}
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Reference< XOutputStream > SAL_CALL StreamSupplier::getOutputStream( ) throw (RuntimeException, std::exception)
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{
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return m_xOutput;
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}
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void SAL_CALL StreamSupplier::seek( ::sal_Int64 location ) throw (IllegalArgumentException, IOException, RuntimeException, std::exception)
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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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::sal_Int64 SAL_CALL StreamSupplier::getPosition( ) throw (IOException, RuntimeException, std::exception)
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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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::sal_Int64 SAL_CALL StreamSupplier::getLength( ) throw (IOException, RuntimeException, std::exception)
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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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//= GraphicAccess
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bool GraphicAccess::isSupportedURL( const OUString& _rURL )
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{
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if ( _rURL.startsWith( "private:resource/" )
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|| _rURL.startsWith( "private:graphicrepository/" )
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|| _rURL.startsWith( "private:standardimage/" )
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|| _rURL.startsWith( "vnd.sun.star.GraphicObject:" )
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|| _rURL.startsWith( "vnd.sun.star.extension://" )
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)
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return true;
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return false;
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}
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SvStream* GraphicAccess::getImageStream( const Reference< XComponentContext >& _rxContext, const OUString& _rImageResourceURL )
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{
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SvStream* pReturn = nullptr;
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try
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{
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// get a GraphicProvider
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Reference< XGraphicProvider > xProvider = css::graphic::GraphicProvider::create(_rxContext);
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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 = "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(), "GraphicAccess::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 = "OutputStream";
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aMediaProperties[0].Value <<= xBufferAccess;
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aMediaProperties[1].Name = "MimeType";
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aMediaProperties[1].Value <<= OUString( "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_FAIL( "GraphicAccess::getImageStream: caught an exception!" );
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}
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return pReturn;
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}
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Reference< XInputStream > GraphicAccess::getImageXStream( const Reference< XComponentContext >& _rxContext, const OUString& _rImageResourceURL )
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{
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return new OSeekableInputStreamWrapper( getImageStream( _rxContext, _rImageResourceURL ), true ); // take ownership
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}
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} // namespace svt
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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