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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/.
*/
#ifndef INCLUDED_OOX_OLE_AXBINARYWRITER_HXX
#define INCLUDED_OOX_OLE_AXBINARYWRITER_HXX
#include <cstddef>
#include <utility>
#include <oox/helper/binaryoutputstream.hxx>
#include <oox/helper/binarystreambase.hxx>
#include <oox/helper/refvector.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
namespace oox {
namespace ole {
/** A wrapper for a binary output stream that supports aligned write operations.
The implementation does support seeking back the wrapped stream. All
seeking operations (tell, seekTo, align) are performed relative to the
position of the wrapped stream at construction time of this wrapper.
Unlike it's reader class counterpart it is NOT possible to construct this
wrapper with an unseekable output stream.
*/
class AxAlignedOutputStream final : public BinaryOutputStream
{
public:
explicit AxAlignedOutputStream( BinaryOutputStream& rOutStrm );
/** Returns the size of the data this stream represents, if the wrapped
stream supports the size() operation. */
virtual sal_Int64 size() const override;
/** Return the current relative stream position (relative to position of
the wrapped stream at construction time). */
virtual sal_Int64 tell() const override;
/** Seeks the stream to the passed relative position, if it is behind the
current position. */
virtual void seek( sal_Int64 nPos ) override;
/** Closes the input stream but not the wrapped stream. */
virtual void close() override;
/** Reads nBytes bytes to the passed sequence.
@return Number of bytes really read. */
virtual void writeData( const StreamDataSequence& orData, size_t nAtomSize = 1 ) override;
/** Reads nBytes bytes to the (existing) buffer opMem.
@return Number of bytes really read. */
virtual void writeMemory( const void* pMem, sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
/** Aligns the stream to a multiple of the passed size (relative to the
position of the wrapped stream at construction time). */
void align( size_t nSize );
void pad( sal_Int32 nBytes );
/** Aligns the stream according to the passed type and reads a value. */
template< typename Type >
void writeAligned( Type nVal ) { align( sizeof( Type ) ); writeValue( nVal ); }
private:
BinaryOutputStream* mpOutStrm; ///< The wrapped input stream.
sal_Int64 mnStrmPos; ///< Tracks relative position in the stream.
sal_Int64 mnStrmSize; ///< Size of the wrapped stream data.
sal_Int64 mnWrappedBeginPos; ///< starting pos or wrapped stream
};
/** A pair of integer values as a property. */
typedef ::std::pair< sal_Int32, sal_Int32 > AxPairData;
/** Export helper to write simple and complex ActiveX form control properties
to a binary input stream. */
class AxBinaryPropertyWriter
{
public:
explicit AxBinaryPropertyWriter( BinaryOutputStream& rOutStrm, bool b64BitPropFlags = false );
/** Write an integer property value to the stream, the
respective flag in the property mask is set. */
template< typename StreamType, typename DataType >
void writeIntProperty( DataType ornValue )
{ startNextProperty(); maOutStrm.writeAligned< StreamType >( ornValue ); }
/** Write a boolean property value to the stream, the
respective flag in the property mask is set. */
void writeBoolProperty( bool orbValue );
/** Write a pair property the stream, the respective flag in
the property mask is set. */
void writePairProperty( AxPairData& orPairData );
/** Write a string property to the stream, the respective flag
in the property mask is set. */
void writeStringProperty( OUString& orValue );
/** Skips the next property clears the respective
flag in the property mask. */
void skipProperty() { startNextProperty( true ); }
/** Final processing, write contents of all complex properties, writes record size */
void finalizeExport();
private:
bool ensureValid();
void startNextProperty( bool bSkip = false );
private:
/** Base class for complex properties such as string, point, size, GUID, picture. */
struct ComplexProperty
{
virtual ~ComplexProperty();
virtual bool writeProperty( AxAlignedOutputStream& rOutStrm ) = 0;
};
/** Complex property for a 32-bit value pair, e.g. point or size. */
struct PairProperty : public ComplexProperty
{
AxPairData& mrPairData;
explicit PairProperty( AxPairData& rPairData ) :
mrPairData( rPairData ) {}
virtual bool writeProperty( AxAlignedOutputStream& rOutStrm ) override;
};
/** Complex property for a string value. */
struct StringProperty : public ComplexProperty
{
OUString& mrValue;
sal_uInt32 mnSize;
explicit StringProperty( OUString& rValue, sal_uInt32 nSize ) :
mrValue( rValue ), mnSize( nSize ) {}
virtual bool writeProperty( AxAlignedOutputStream& rOutStrm ) override;
};
/** Stream property for a picture or mouse icon. */
struct PictureProperty : public ComplexProperty
{
virtual bool writeProperty( AxAlignedOutputStream& rOutStrm ) override;
};
typedef RefVector< ComplexProperty > ComplexPropVector;
private:
AxAlignedOutputStream maOutStrm; ///< The input stream to read from.
ComplexPropVector maLargeProps; ///< Stores info for all used large properties.
ComplexPropVector maStreamProps; ///< Stores info for all used stream data properties.
sal_Int16 mnBlockSize;
sal_Int64 mnPropFlagsStart; ///< pos of Prop flags
sal_Int64 mnPropFlags; ///< Flags specifying existing properties.
sal_Int64 mnNextProp; ///< Next property to read.
bool mbValid; ///< True = stream still valid.
bool mb64BitPropFlags;
};
} // namespace ole
} // namespace oox
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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