fshelper.hxx

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#ifndef INCLUDED_SAX_FSHELPER_HXX
#define INCLUDED_SAX_FSHELPER_HXX
 
#include <com/sun/star/xml/sax/XFastAttributeList.hpp>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/uno/Sequence.hxx>
#include <rtl/ustring.hxx>
#include <rtl/ref.hxx>
#include <sax/saxdllapi.h>
#include <optional>
#include <memory>
#include <string_view>
#include <utility>
 
namespace com::sun::star::io { class XOutputStream; }
namespace sax_fastparser { class FastAttributeList; }
 
constexpr sal_Int32 FSNS(sal_Int32 namespc, sal_Int32 element) { return (namespc << 16) | element; }
 
namespace sax_fastparser {
 
enum class MergeMarks { APPEND = 0, PREPEND = 1, POSTPONE = 2};
 
class FastSaxSerializer;
 
class SAX_DLLPUBLIC FastSerializerHelper
{
public:
 
    FastSerializerHelper( const css::uno::Reference< css::io::XOutputStream >& xOutputStream, bool bWriteHeader );
 
    ~FastSerializerHelper();
 
    void startDocument();
    void endDocument();
 
    template<typename... Args>
    void startElement(sal_Int32 elementTokenId, sal_Int32 attribute, const char* value, Args &&... args)
    {
        if (value)
            pushAttributeValue(attribute, value);
        startElement(elementTokenId, std::forward<Args>(args)...);
    }
    template<typename... Args>
    void startElement(sal_Int32 elementTokenId, sal_Int32 attribute,
                      const std::optional<OString>& value, Args&&... args)
    {
        if (value)
            pushAttributeValue(attribute, *value);
        startElement(elementTokenId, std::forward<Args>(args)...);
    }
    template<typename... Args>
    void startElement(sal_Int32 elementTokenId, sal_Int32 attribute,
                      const std::optional<OUString>& value, Args&&... args)
    {
        std::optional<OString> opt;
        if (value)
            opt = value->toUtf8();
        startElement(elementTokenId, attribute, opt, std::forward<Args>(args)...);
    }
    void startElement(sal_Int32 elementTokenId);
 
    template<typename... Args>
    void startElementNS(sal_Int32 namespaceTokenId, sal_Int32 elementTokenId, Args &&... args)
    {
        startElement(FSNS(namespaceTokenId, elementTokenId), std::forward<Args>(args)...);
    }
 
    template<typename... Args>
    void singleElement(sal_Int32 elementTokenId, sal_Int32 attribute, const char* value, Args &&... args)
    {
        if (value)
            pushAttributeValue(attribute, value);
        singleElement(elementTokenId, std::forward<Args>(args)...);
    }
    template<typename... Args>
    void singleElement(sal_Int32 elementTokenId, sal_Int32 attribute,
                       const std::optional<OString>& value, Args&&... args)
    {
        if (value)
            pushAttributeValue(attribute, *value);
        singleElement(elementTokenId, std::forward<Args>(args)...);
    }
    template<typename... Args>
    void singleElement(sal_Int32 elementTokenId, sal_Int32 attribute,
                       const std::optional<OUString>& value, Args&&... args)
    {
        std::optional<OString> opt;
        if (value)
            opt = value->toUtf8();
        singleElement(elementTokenId, attribute, opt, std::forward<Args>(args)...);
    }
    void singleElement(sal_Int32 elementTokenId);
 
    template<typename... Args>
    void singleElementNS(sal_Int32 namespaceTokenId, sal_Int32 elementTokenId, Args &&... args)
    {
        singleElement(FSNS(namespaceTokenId, elementTokenId), std::forward<Args>(args)...);
    }
 
    void endElement(sal_Int32 elementTokenId);
    void endElementNS(sal_Int32 namespaceTokenId, sal_Int32 elementTokenId)
        { endElement( FSNS( namespaceTokenId, elementTokenId ) ); }
 
    void singleElement(sal_Int32 elementTokenId, const rtl::Reference<FastAttributeList>& xAttrList);
 
    void startElement(sal_Int32 elementTokenId, const rtl::Reference<FastAttributeList>& xAttrList);
 
    FastSerializerHelper* write(const char* value);
    FastSerializerHelper* write(const OString& value);
    FastSerializerHelper* write(std::u16string_view value);
    FastSerializerHelper* write(sal_Int32 value);
    FastSerializerHelper* write(sal_Int64 value);
    FastSerializerHelper* write(double value);
 
    FastSerializerHelper* writeEscaped(const char* value);
    FastSerializerHelper* writeEscaped(std::u16string_view value);
 
    FastSerializerHelper* writeId(sal_Int32 tokenId);
 
    css::uno::Reference< css::io::XOutputStream > const & getOutputStream() const;
 
    static rtl::Reference<FastAttributeList> createAttrList();
 
    void mark(sal_Int32 nTag,
            const css::uno::Sequence< sal_Int32 >& rOrder =
            css::uno::Sequence< sal_Int32 >() );
    void mergeTopMarks(sal_Int32 nTag,
            MergeMarks eMergeType = MergeMarks::APPEND );
 
    void setAllowXEscape(bool bSet);
 
private:
    void pushAttributeValue( sal_Int32 attribute, const char* value );
    void pushAttributeValue( sal_Int32 attribute, const OString& value );
 
    std::unique_ptr<FastSaxSerializer> mpSerializer;
};
 
typedef std::shared_ptr< FastSerializerHelper > FSHelperPtr;
 
// Helpers to make intention to pass optional attributes to *Element functions explicit, instead of
// using `(condition) ? value.toUtf8().getStr() : nullptr` syntax.
inline const char* UseIf(const char* s, bool bUse) { return bUse ? s : nullptr; }
// OString, OUString
template<class TString>
std::optional<TString> UseIf(const TString& s, bool bUse)
{
    return bUse ? std::optional<TString>(s) : std::optional<TString>();
}
 
}
 
#endif // INCLUDED_SAX_FSHELPER_HXX
 
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