seekableinput.hxx

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#ifndef INCLUDED_COMPHELPER_SEEKABLEINPUT_HXX
#define INCLUDED_COMPHELPER_SEEKABLEINPUT_HXX
 
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <cppuhelper/implbase.hxx>
#include <comphelper/comphelperdllapi.h>
#include <mutex>
 
namespace com::sun::star::uno { class XComponentContext; }
 
namespace comphelper
{
 
class SAL_DLLPUBLIC_TEMPLATE OSeekableInputWrapper_BASE
    : public ::cppu::WeakImplHelper< css::io::XInputStream,
                                     css::io::XSeekable >
{};
 
class COMPHELPER_DLLPUBLIC OSeekableInputWrapper final
    : public OSeekableInputWrapper_BASE
{
    std::mutex    m_aMutex;
 
    css::uno::Reference< css::uno::XComponentContext > m_xContext;
 
    css::uno::Reference< css::io::XInputStream > m_xOriginalStream;
 
    css::uno::Reference< css::io::XInputStream > m_xCopyInput;
    css::uno::Reference< css::io::XSeekable > m_xCopySeek;
 
private:
    COMPHELPER_DLLPRIVATE void PrepareCopy_Impl();
 
public:
    OSeekableInputWrapper(
                css::uno::Reference< css::io::XInputStream > xInStream,
                css::uno::Reference< css::uno::XComponentContext > xContext );
 
    virtual ~OSeekableInputWrapper() override;
 
    static css::uno::Reference< css::io::XInputStream > CheckSeekableCanWrap(
                        const css::uno::Reference< css::io::XInputStream >& xInStream,
                        const css::uno::Reference< css::uno::XComponentContext >& rxContext );
 
// XInputStream
    virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override;
    virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) override;
    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
    virtual sal_Int32 SAL_CALL available() override;
    virtual void SAL_CALL closeInput() 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;
 
};
 
}   // namespace comphelper
 
#endif
 
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