xml2utf.hxx

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#ifndef INCLUDED_SAX_INC_XML2UTF_HXX
#define INCLUDED_SAX_INC_XML2UTF_HXX
 
#include <sal/config.h>
 
#include <memory>
 
#include <sal/types.h>
#include <rtl/string.hxx>
 
#include <com/sun/star/io/XInputStream.hpp>
 
namespace sax_expatwrap {
 
class Text2UnicodeConverter
{
 
public:
    Text2UnicodeConverter( const OString & sEncoding );
    ~Text2UnicodeConverter();
 
    css::uno::Sequence < sal_Unicode > convert( const css::uno::Sequence<sal_Int8> & );
    bool canContinue() const { return m_bCanContinue; }
 
private:
    void init( rtl_TextEncoding encoding );
 
    rtl_TextToUnicodeConverter   m_convText2Unicode;
    rtl_TextToUnicodeContext     m_contextText2Unicode;
    bool                         m_bCanContinue;
    bool                         m_bInitialized;
    css::uno::Sequence<sal_Int8> m_seqSource;
};
 
/*----------------------------------------
*
* Unicode2TextConverter
*
**-----------------------------------------*/
class Unicode2TextConverter
{
public:
    Unicode2TextConverter( rtl_TextEncoding encoding );
    ~Unicode2TextConverter();
 
    css::uno::Sequence<sal_Int8> convert( const sal_Unicode * , sal_Int32 nLength );
 
private:
    rtl_UnicodeToTextConverter      m_convUnicode2Text;
    rtl_UnicodeToTextContext        m_contextUnicode2Text;
    css::uno::Sequence<sal_Unicode> m_seqSource;
};
 
 
/*----------------------------------------
*
* XMLFile2UTFConverter
*
**-----------------------------------------*/
class XMLFile2UTFConverter
{
public:
    XMLFile2UTFConverter( ):
        m_bStarted( false )
        {}
 
    void setInputStream( css::uno::Reference< css::io::XInputStream > const &r ) { m_in = r; }
    void setEncoding( const OString &s ) { m_sEncoding = s; }
 
 
    // @param nMaxToRead The number of chars, that should be read. Note that this is no exact number. There
    //                   may be returned less or more bytes than ordered.
    sal_Int32 readAndConvert( css::uno::Sequence<sal_Int8> &seq , sal_Int32 nMaxToRead );
 
private:
 
    // Called only on first Sequence of bytes. Tries to figure out file format and encoding information.
    // @return TRUE, when encoding information could be retrieved
    // @return FALSE, when no encoding information was found in file
    bool scanForEncoding( css::uno::Sequence<sal_Int8> &seq );
 
    // Called only on first Sequence of bytes. Tries to figure out
    // if enough data is available to scan encoding
    // @return TRUE, when encoding is retrievable
    // @return FALSE, when more data is needed
    static bool isEncodingRecognizable( const css::uno::Sequence< sal_Int8 > & seq );
 
    // When encoding attribute is within the text (in the first line), it is removed.
    static void removeEncoding( css::uno::Sequence<sal_Int8> &seq );
 
    // Initializes decoding depending on m_sEncoding setting
    void initializeDecoding();
private:
    css::uno::Reference< css::io::XInputStream >  m_in;
 
    bool m_bStarted;
    OString m_sEncoding;
 
    std::unique_ptr<Text2UnicodeConverter> m_pText2Unicode;
    std::unique_ptr<Unicode2TextConverter> m_pUnicode2Text;
};
}
 
#endif // INCLUDED_SAX_INC_XML2UTF_HXX
 
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