source/ucbhelper/xtempfile.cxx

/**************************************************************
 *
 * 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.
 *
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#include "precompiled_unotools.hxx"
#include <XTempFile.hxx>
#include <cppuhelper/factory.hxx>
#include <cppuhelper/typeprovider.hxx>
#include <cppuhelper/implementationentry.hxx>
#include <unotools/tempfile.hxx>
#include <osl/file.hxx>
#include <unotools/configmgr.hxx>
#include <tools/urlobj.hxx>
#include <tools/debug.hxx>

namespace css = com::sun::star;

// copy define from desktop\source\app\appinit.cxx

#define DESKTOP_TEMPNAMEBASE_DIR    "/temp/soffice.tmp"

OTempFileService::OTempFileService(::css::uno::Reference< ::css::uno::XComponentContext > const & context)
: ::cppu::PropertySetMixin< ::css::io::XTempFile >(
    context
    , static_cast< Implements >( IMPLEMENTS_PROPERTY_SET | IMPLEMENTS_FAST_PROPERTY_SET | IMPLEMENTS_PROPERTY_ACCESS )
    , com::sun::star::uno::Sequence< rtl::OUString >() )
, mpStream( NULL )
, mbRemoveFile( sal_True )
, mbInClosed( sal_False )
, mbOutClosed( sal_False )
, mnCachedPos( 0 )
, mbHasCachedPos( sal_False )

{
    mpTempFile = new ::utl::TempFile;
    mpTempFile->EnableKillingFile ( sal_True );
}

OTempFileService::~OTempFileService ()
{
    if ( mpTempFile )
        delete mpTempFile;
}


// XInterface

::css::uno::Any SAL_CALL OTempFileService::queryInterface( ::css::uno::Type const & aType )
{
    ::css::uno::Any aResult( OTempFileBase::queryInterface( aType ) );
    if (!aResult.hasValue())
        aResult = cppu::PropertySetMixin< ::css::io::XTempFile >::queryInterface( aType ) ;
    return aResult;
};
void SAL_CALL OTempFileService::acquire(  )
throw ()
{
    OTempFileBase::acquire();
}
void SAL_CALL OTempFileService::release(  )
throw ()
{
    OTempFileBase::release();
}

//  XTypeProvider

::css::uno::Sequence< ::css::uno::Type > SAL_CALL OTempFileService::getTypes(  )
{
    static ::cppu::OTypeCollection* pTypeCollection = NULL;
    if ( pTypeCollection == NULL )
    {
        ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() ) ;

        if ( pTypeCollection == NULL )
        {
            static ::cppu::OTypeCollection aTypeCollection(
                ::getCppuType( ( const ::css::uno::Reference< ::css::beans::XPropertySet >*)NULL )
                ,OTempFileBase::getTypes() );
            pTypeCollection = &aTypeCollection;
        }
    }
    return pTypeCollection->getTypes();
};
::css::uno::Sequence< sal_Int8 > SAL_CALL OTempFileService::getImplementationId(  )
{
    return OTempFileBase::getImplementationId();
}

//  XTempFile

sal_Bool SAL_CALL OTempFileService::getRemoveFile()
{
    ::osl::MutexGuard aGuard( maMutex );

    if ( !mpTempFile )
    {
        // the stream is already disconnected
        throw ::css::uno::RuntimeException();
        }

    return mbRemoveFile;
};
void SAL_CALL OTempFileService::setRemoveFile( sal_Bool _removefile )
{
    ::osl::MutexGuard aGuard( maMutex );

    if ( !mpTempFile )
    {
        // the stream is already disconnected
        throw ::css::uno::RuntimeException();
    }

    mbRemoveFile = _removefile;
    mpTempFile->EnableKillingFile( mbRemoveFile );
};
::rtl::OUString SAL_CALL OTempFileService::getUri()
{
    ::osl::MutexGuard aGuard( maMutex );

    if ( !mpTempFile )
    {
        throw ::css::uno::RuntimeException();
    }

    return ::rtl::OUString( mpTempFile->GetURL() );

};
::rtl::OUString SAL_CALL OTempFileService::getResourceName()
{
    ::osl::MutexGuard aGuard( maMutex );

    if ( !mpTempFile )
    {
        throw ::css::uno::RuntimeException();
}

    return ::rtl::OUString( mpTempFile->GetFileName() );
};


// XInputStream

sal_Int32 SAL_CALL OTempFileService::readBytes( ::css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbInClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();
    if (nBytesToRead < 0)
        throw ::css::io::BufferSizeExceededException( ::rtl::OUString(), static_cast< ::css::uno::XWeak * >(this));

    aData.realloc(nBytesToRead);

    sal_uInt32 nRead = mpStream->Read(static_cast < void* > ( aData.getArray() ), nBytesToRead);
    checkError();

    if (nRead < static_cast < sal_uInt32 > ( nBytesToRead ) )
        aData.realloc( nRead );

    if ( sal::static_int_cast<sal_uInt32>(nBytesToRead) > nRead )
    {
        // usually that means that the stream was read till the end
        // TODO/LATER: it is better to get rid of this optimization by avoiding using of multiple temporary files ( there should be only one temporary file? )
        mnCachedPos = mpStream->Tell();
        mbHasCachedPos = sal_True;

        mpStream = NULL;
        if ( mpTempFile )
            mpTempFile->CloseStream();
    }

    return nRead;
}
sal_Int32 SAL_CALL OTempFileService::readSomeBytes( ::css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbInClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();
    checkError();

    if (nMaxBytesToRead < 0)
        throw ::css::io::BufferSizeExceededException( ::rtl::OUString(), static_cast < ::css::uno::XWeak * >( this ) );

    if (mpStream->IsEof())
    {
        aData.realloc(0);
        return 0;
    }
    else
        return readBytes(aData, nMaxBytesToRead);
}
void SAL_CALL OTempFileService::skipBytes( sal_Int32 nBytesToSkip )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbInClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();
    checkError();
    mpStream->SeekRel(nBytesToSkip);
    checkError();
}
sal_Int32 SAL_CALL OTempFileService::available(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbInClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();

    sal_uInt32 nPos = mpStream->Tell();
    checkError();

    mpStream->Seek(STREAM_SEEK_TO_END);
    checkError();

    sal_Int32 nAvailable = (sal_Int32)mpStream->Tell() - nPos;
    mpStream->Seek(nPos);
    checkError();

    return nAvailable;
}
void SAL_CALL OTempFileService::closeInput(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbInClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak  * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    mbInClosed = sal_True;

    if ( mbOutClosed )
    {
        // stream will be deleted by TempFile implementation
        mpStream = NULL;

        if ( mpTempFile )
        {
            delete mpTempFile;
            mpTempFile = NULL;
        }
    }
}

// XOutputStream

void SAL_CALL OTempFileService::writeBytes( const ::css::uno::Sequence< sal_Int8 >& aData )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbOutClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();
    sal_uInt32 nWritten = mpStream->Write(aData.getConstArray(),aData.getLength());
    checkError();
    if  ( nWritten != (sal_uInt32)aData.getLength())
        throw ::css::io::BufferSizeExceededException( ::rtl::OUString(),static_cast < ::css::uno::XWeak * > ( this ) );
}
void SAL_CALL OTempFileService::flush(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbOutClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    checkConnected();
    mpStream->Flush();
    checkError();
}
void SAL_CALL OTempFileService::closeOutput(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    if ( mbOutClosed )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );

    mbOutClosed = sal_True;

    // TODO/LATER: it is better to get rid of this optimization by avoiding using of multiple temporary files ( there should be only one temporary file? )
    if ( mpStream )
    {
        mnCachedPos = mpStream->Tell();
        mbHasCachedPos = sal_True;

        mpStream = NULL;
        if ( mpTempFile )
            mpTempFile->CloseStream();
    }

    if ( mbInClosed )
    {
        // stream will be deleted by TempFile implementation
        mpStream = NULL;

        if ( mpTempFile )
        {
            delete mpTempFile;
            mpTempFile = NULL;
        }
    }
}


void OTempFileService::checkError () const
{
    if (!mpStream || mpStream->SvStream::GetError () != ERRCODE_NONE )
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );
}
void OTempFileService::checkConnected ()
{
    if (!mpStream && mpTempFile)
    {
        mpStream = mpTempFile->GetStream( STREAM_STD_READWRITE );
        if ( mpStream && mbHasCachedPos )
        {
            mpStream->Seek( sal::static_int_cast<sal_Size>(mnCachedPos) );
            if ( mpStream->SvStream::GetError () == ERRCODE_NONE )
            {
                mbHasCachedPos = sal_False;
                mnCachedPos = 0;
            }
            else
            {
                mpStream = NULL;
                mpTempFile->CloseStream();
            }
        }
    }

    if (!mpStream)
        throw ::css::io::NotConnectedException ( ::rtl::OUString(), const_cast < ::css::uno::XWeak * > ( static_cast < const ::css::uno::XWeak * > (this ) ) );
}

// XSeekable

void SAL_CALL OTempFileService::seek( sal_Int64 nLocation )
{
    ::osl::MutexGuard aGuard( maMutex );
    checkConnected();
    if ( nLocation < 0 || nLocation > getLength() )
        throw ::css::lang::IllegalArgumentException();

    mpStream->Seek((sal_uInt32) nLocation );
    checkError();
}
sal_Int64 SAL_CALL OTempFileService::getPosition(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    checkConnected();

    sal_uInt32 nPos = mpStream->Tell();
    checkError();
    return (sal_Int64)nPos;
}
sal_Int64 SAL_CALL OTempFileService::getLength(  )
{
    ::osl::MutexGuard aGuard( maMutex );
    checkConnected();

    sal_uInt32 nCurrentPos = mpStream->Tell();
    checkError();

    mpStream->Seek(STREAM_SEEK_TO_END);
    sal_uInt32 nEndPos = mpStream->Tell();
    mpStream->Seek(nCurrentPos);

    checkError();

    return (sal_Int64)nEndPos;
}


// XStream

::css::uno::Reference< ::css::io::XInputStream > SAL_CALL OTempFileService::getInputStream()
    {
    return ::css::uno::Reference< ::css::io::XInputStream >( *this, ::css::uno::UNO_QUERY );
}

::css::uno::Reference< ::css::io::XOutputStream > SAL_CALL OTempFileService::getOutputStream()
    {
    return ::css::uno::Reference< ::css::io::XOutputStream >( *this, ::css::uno::UNO_QUERY );
    }

// XTruncate

void SAL_CALL OTempFileService::truncate()
{
    ::osl::MutexGuard aGuard( maMutex );
    checkConnected();
    // SetStreamSize() call does not change the position
    mpStream->Seek( 0 );
    mpStream->SetStreamSize( 0 );
    checkError();
}

// XServiceInfo

::rtl::OUString SAL_CALL OTempFileService::getImplementationName()
{
    return getImplementationName_Static();
}

sal_Bool SAL_CALL OTempFileService::supportsService( ::rtl::OUString const & rServiceName )
{
    ::css::uno::Sequence< ::rtl::OUString > aServices(getSupportedServiceNames_Static());
    return rServiceName == aServices[0];
}

::css::uno::Sequence < ::rtl::OUString > SAL_CALL OTempFileService::getSupportedServiceNames()
{
    return getSupportedServiceNames_Static();
}


::rtl::OUString OTempFileService::getImplementationName_Static ()
{
    return ::rtl::OUString ( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.io.comp.TempFile" ) );
}
::css::uno::Sequence < ::rtl::OUString > OTempFileService::getSupportedServiceNames_Static()
{
    ::css::uno::Sequence < ::rtl::OUString > aNames ( 1 );
    aNames[0] = ::rtl::OUString ( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.io.TempFile" ) );
    return aNames;
}
::css::uno::Reference < ::css::uno::XInterface >SAL_CALL XTempFile_createInstance(
    css::uno::Reference< ::css::uno::XComponentContext > const & context)
{
    return static_cast< ::cppu::OWeakObject * >( new OTempFileService(context) );
}

static struct ::cppu::ImplementationEntry g_component_entries[] =
{
    {
        XTempFile_createInstance,
        OTempFileService::getImplementationName_Static,
        OTempFileService::getSupportedServiceNames_Static,
        ::cppu::createSingleComponentFactory,
        0,
        0
    },
    { 0, 0, 0, 0, 0, 0 }
};

// C functions to implement this as a component

extern "C" SAL_DLLPUBLIC_EXPORT void SAL_CALL component_getImplementationEnvironment(
                const sal_Char ** ppEnvTypeName, uno_Environment ** /*ppEnv*/ )
{
    *ppEnvTypeName = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
}

/**
 * This function is called to get service factories for an implementation.
 * @param pImplName name of implementation
 * @param pServiceManager generic uno interface providing a service manager to instantiate components
 * @param pRegistryKey registry data key to read and write component persistent data
 * @return a component factory (generic uno interface)
 */
extern "C" SAL_DLLPUBLIC_EXPORT void * SAL_CALL component_getFactory(
    const sal_Char * pImplName, void * pServiceManager, void * pRegistryKey )
{
    return ::cppu::component_getFactoryHelper( pImplName, pServiceManager, pRegistryKey, g_component_entries );
}