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Diffstat (limited to 'include/oox/ole/axbinarywriter.hxx')
| -rw-r--r-- | include/oox/ole/axbinarywriter.hxx | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/include/oox/ole/axbinarywriter.hxx b/include/oox/ole/axbinarywriter.hxx new file mode 100644 index 0000000000..d19e2ae3b3 --- /dev/null +++ b/include/oox/ole/axbinarywriter.hxx @@ -0,0 +1,167 @@ +/* -*- 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::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 final : public ComplexProperty + { + private: + AxPairData& mrPairData; + + public: + explicit PairProperty( AxPairData& rPairData ) : + mrPairData( rPairData ) {} + virtual bool writeProperty( AxAlignedOutputStream& rOutStrm ) override; + }; + + /** Complex property for a string value. */ + struct StringProperty final : public ComplexProperty + { + private: + OUString& mrValue; + sal_uInt32 mnSize; + public: + 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 final : 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 oox::ole + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |