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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 <svtools/imageresourceaccess.hxx>
#include <com/sun/star/io/NotConnectedException.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/graphic/GraphicProvider.hpp>
#include <com/sun/star/graphic/XGraphicProvider.hpp>
#include <com/sun/star/io/XStream.hpp>
#include <osl/diagnose.h>
#include <unotools/ucbstreamhelper.hxx>
#include <tools/stream.hxx>
#include <unotools/streamwrap.hxx>
#include <cppuhelper/implbase.hxx>
#include <comphelper/processfactory.hxx>
namespace svt
{
using namespace ::utl;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::graphic;
//= StreamSupplier
typedef ::cppu::WeakImplHelper < XStream
, XSeekable
> StreamSupplier_Base;
class StreamSupplier : public StreamSupplier_Base
{
private:
Reference< XInputStream > m_xInput;
Reference< XOutputStream > m_xOutput;
Reference< XSeekable > m_xSeekable;
public:
StreamSupplier( const Reference< XInputStream >& _rxInput, const Reference< XOutputStream >& _rxOutput );
protected:
// XStream
virtual Reference< XInputStream > SAL_CALL getInputStream( ) override;
virtual Reference< XOutputStream > SAL_CALL getOutputStream( ) override;
// XSeekable
virtual void SAL_CALL seek( ::sal_Int64 location ) override;
virtual ::sal_Int64 SAL_CALL getPosition( ) override;
virtual ::sal_Int64 SAL_CALL getLength( ) override;
};
StreamSupplier::StreamSupplier( const Reference< XInputStream >& _rxInput, const Reference< XOutputStream >& _rxOutput )
:m_xInput( _rxInput )
,m_xOutput( _rxOutput )
{
m_xSeekable.set(m_xInput, css::uno::UNO_QUERY);
if ( !m_xSeekable.is() )
m_xSeekable.set(m_xOutput, css::uno::UNO_QUERY);
OSL_ENSURE( m_xSeekable.is(), "StreamSupplier::StreamSupplier: at least one of both must be seekable!" );
}
Reference< XInputStream > SAL_CALL StreamSupplier::getInputStream( )
{
return m_xInput;
}
Reference< XOutputStream > SAL_CALL StreamSupplier::getOutputStream( )
{
return m_xOutput;
}
void SAL_CALL StreamSupplier::seek( ::sal_Int64 location )
{
if ( !m_xSeekable.is() )
throw NotConnectedException();
m_xSeekable->seek( location );
}
::sal_Int64 SAL_CALL StreamSupplier::getPosition( )
{
if ( !m_xSeekable.is() )
throw NotConnectedException();
return m_xSeekable->getPosition();
}
::sal_Int64 SAL_CALL StreamSupplier::getLength( )
{
if ( !m_xSeekable.is() )
throw NotConnectedException();
return m_xSeekable->getLength();
}
//= GraphicAccess
bool GraphicAccess::isSupportedURL( const OUString& _rURL )
{
if ( _rURL.startsWith( "private:resource/" )
|| _rURL.startsWith( "private:graphicrepository/" )
|| _rURL.startsWith( "private:standardimage/" )
|| _rURL.startsWith( "vnd.sun.star.GraphicObject:" )
|| _rURL.startsWith( "vnd.sun.star.extension://" )
)
return true;
return false;
}
SvStream* GraphicAccess::getImageStream( const Reference< XComponentContext >& _rxContext, const OUString& _rImageResourceURL )
{
SvStream* pReturn = nullptr;
try
{
// get a GraphicProvider
Reference< XGraphicProvider > xProvider = css::graphic::GraphicProvider::create(_rxContext);
// let it create a graphic from the given URL
Sequence< PropertyValue > aMediaProperties( 1 );
aMediaProperties[0].Name = "URL";
aMediaProperties[0].Value <<= _rImageResourceURL;
Reference< XGraphic > xGraphic( xProvider->queryGraphic( aMediaProperties ) );
OSL_ENSURE( xGraphic.is(), "GraphicAccess::getImageStream: the provider did not give us a graphic object!" );
if ( !xGraphic.is() )
return pReturn;
// copy the graphic to a in-memory buffer
SvMemoryStream* pMemBuffer = new SvMemoryStream;
Reference< XStream > xBufferAccess = new StreamSupplier(
new OSeekableInputStreamWrapper( *pMemBuffer ),
new OSeekableOutputStreamWrapper( *pMemBuffer )
);
aMediaProperties.realloc( 2 );
aMediaProperties[0].Name = "OutputStream";
aMediaProperties[0].Value <<= xBufferAccess;
aMediaProperties[1].Name = "MimeType";
aMediaProperties[1].Value <<= OUString( "image/png" );
xProvider->storeGraphic( xGraphic, aMediaProperties );
pMemBuffer->Seek( 0 );
pReturn = pMemBuffer;
}
catch( const Exception& )
{
OSL_FAIL( "GraphicAccess::getImageStream: caught an exception!" );
}
return pReturn;
}
Reference< XInputStream > GraphicAccess::getImageXStream( const Reference< XComponentContext >& _rxContext, const OUString& _rImageResourceURL )
{
return new OSeekableInputStreamWrapper( getImageStream( _rxContext, _rImageResourceURL ), true ); // take ownership
}
} // namespace svt
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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