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#ifndef INCLUDED_FORMULA_GRAMMAR_HXX
#define INCLUDED_FORMULA_GRAMMAR_HXX

#include <com/sun/star/sheet/FormulaLanguage.hpp>
#include <formula/formuladllapi.h>
#include <sal/types.h>

namespace formula
{

/** Grammars digested by ScCompiler.
 */
class FORMULA_DLLPUBLIC FormulaGrammar
{
public:
    enum AddressConvention{
        CONV_UNSPECIFIED = -1,  /* useful when we want method to chose, must be first */

        /* elements must be sequential and changes should be reflected in ScCompiler::pCharTables */
        CONV_OOO     =  0,  /* 'doc'#sheet.A1:sheet2.B2 */
        CONV_ODF,           /* ['doc'#sheet.A1:sheet2.B2] */
        CONV_XL_A1,         /* [doc]sheet:sheet2!A1:B2 */
        CONV_XL_R1C1,       /* [doc]sheet:sheet2!R1C1:R2C2 */
        CONV_XL_OOX,        /* [#]sheet:sheet2!A1:B2 */

        CONV_LOTUS_A1,      /* external? 3d? A1.B2 <placeholder/> */

        CONV_LAST,   /* for loops, must always be last */

        // not a real address convention, a special case for INDIRECT function interpretation
        // only -> try using CONV_OOO, failing that CONV_XL_A1
        CONV_A1_XL_A1
    };

    //! CONV_UNSPECIFIED is a negative value!
    static const int kConventionOffset = - CONV_UNSPECIFIED + 1;
    // Room for 32k hypothetical languages plus EXTERNAL.
    static const int kConventionShift  = 16;
    // Room for 256 reference conventions.
    static const int kEnglishBit       = (1 << (kConventionShift + 8));
    // Mask off all non-language bits.
    static const int kFlagMask         = ~((~unsigned(0)) << kConventionShift);

    /** Values encoding the formula language plus address reference convention
        plus English parsing/formatting
     */
    //! When adding new values adapt isSupported() below as well.
    enum Grammar
    {
        /// Used only in ScCompiler ctor and in some XML import API context.
        GRAM_UNSPECIFIED    = -1,
        /// ODFF with default ODF A1 bracketed references.
        GRAM_ODFF           = css::sheet::FormulaLanguage::ODFF                 |
                                ((CONV_ODF           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// ODF 1.1 with default ODF A1 bracketed references.
        GRAM_PODF           = css::sheet::FormulaLanguage::ODF_11               |
                                ((CONV_ODF           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// English with default A1 reference style.
        GRAM_ENGLISH        = css::sheet::FormulaLanguage::ENGLISH              |
                                ((CONV_OOO           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// Native with default A1 reference style.
        GRAM_NATIVE         = css::sheet::FormulaLanguage::NATIVE               |
                                ((CONV_OOO           +
                                  kConventionOffset) << kConventionShift),
        /// ODFF with reference style as set in UI, may be A1 or R1C1.
        GRAM_ODFF_UI        = css::sheet::FormulaLanguage::ODFF                 |
                                ((CONV_UNSPECIFIED   +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// ODFF with A1 reference style, unbracketed.
        GRAM_ODFF_A1        = css::sheet::FormulaLanguage::ODFF                 |
                                ((CONV_OOO           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// ODF 1.1 with reference style as set in UI, may be A1 or R1C1.
        GRAM_PODF_UI        = css::sheet::FormulaLanguage::ODF_11               |
                                ((CONV_UNSPECIFIED   +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// ODF 1.1 with A1 reference style, unbracketed.
        GRAM_PODF_A1        = css::sheet::FormulaLanguage::ODF_11               |
                                ((CONV_OOO           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// Native with reference style as set in UI, may be A1 or R1C1.
        GRAM_NATIVE_UI      = css::sheet::FormulaLanguage::NATIVE               |
                                ((CONV_UNSPECIFIED   +
                                  kConventionOffset) << kConventionShift),
        /// Native with ODF A1 bracketed references. Not very useful but supported.
        GRAM_NATIVE_ODF     = css::sheet::FormulaLanguage::NATIVE               |
                                ((CONV_ODF           +
                                  kConventionOffset) << kConventionShift),
        /// Native with Excel A1 reference style.
        GRAM_NATIVE_XL_A1   = css::sheet::FormulaLanguage::NATIVE               |
                                ((CONV_XL_A1         +
                                  kConventionOffset) << kConventionShift),
        /// Native with Excel R1C1 reference style.
        GRAM_NATIVE_XL_R1C1 = css::sheet::FormulaLanguage::NATIVE               |
                                ((CONV_XL_R1C1       +
                                  kConventionOffset) << kConventionShift),
        /// English with Excel A1 reference style.
        GRAM_ENGLISH_XL_A1   = css::sheet::FormulaLanguage::XL_ENGLISH               |
                                ((CONV_XL_A1         +
                                  kConventionOffset) << kConventionShift)            |
                                kEnglishBit,
        /// English with Excel R1C1 reference style.
        GRAM_ENGLISH_XL_R1C1 = css::sheet::FormulaLanguage::XL_ENGLISH               |
                                ((CONV_XL_R1C1       +
                                  kConventionOffset) << kConventionShift)            |
                                kEnglishBit,
        /// English with Excel OOXML reference style.
        GRAM_ENGLISH_XL_OOX  = css::sheet::FormulaLanguage::XL_ENGLISH               |
                                ((CONV_XL_OOX        +
                                  kConventionOffset) << kConventionShift)            |
                                kEnglishBit,
        /// Excel OOXML with Excel OOXML reference style.
        GRAM_OOXML           = css::sheet::FormulaLanguage::OOXML               |
                                ((CONV_XL_OOX        +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// API English with A1 reference style, unbracketed.
        GRAM_API            = css::sheet::FormulaLanguage::API                  |
                                ((CONV_OOO           +
                                  kConventionOffset) << kConventionShift)       |
                                kEnglishBit,
        /// Central definition of the default grammar to be used.
        GRAM_DEFAULT        = GRAM_NATIVE_UI,

        /// Central definition of the default storage grammar to be used.
        GRAM_STORAGE_DEFAULT = GRAM_ODFF,

        /** OpCodeMap set by external filter and merged with reference
            convention plus English bit on top. Plain value acts as
            FormulaLanguage. */
        GRAM_EXTERNAL       = (1 << (kConventionShift - 1))
    };

    /// If English parsing/formatting is associated with a grammar.
    static bool isEnglish( const Grammar eGrammar )
    {
        return (eGrammar & kEnglishBit) != 0;
    }

    /** Compatibility helper for old "bCompileEnglish, bCompileXML" API calls
        to obtain the new grammar. */
    static Grammar mapAPItoGrammar( const bool bEnglish, const bool bXML );

    static bool isSupported( const Grammar eGrammar );

    static sal_Int32 extractFormulaLanguage( const Grammar eGrammar )
    {
        return eGrammar & kFlagMask;
    }

    static AddressConvention extractRefConvention( const Grammar eGrammar )
    {
        return static_cast<AddressConvention>(
                ((eGrammar & ~kEnglishBit) >> kConventionShift) -
                kConventionOffset);
    }

    static Grammar setEnglishBit( const Grammar eGrammar, const bool bEnglish );

    static Grammar mergeToGrammar( const Grammar eGrammar, const AddressConvention eConv );

    /// If grammar is of ODF 1.1
    static bool isPODF( const Grammar eGrammar )
    {
        return extractFormulaLanguage( eGrammar) ==
            css::sheet::FormulaLanguage::ODF_11;
    }

    /// If grammar is of ODFF
    static bool isODFF( const Grammar eGrammar )
    {
        return extractFormulaLanguage( eGrammar) ==
            css::sheet::FormulaLanguage::ODFF;
    }

    /// If grammar is of OOXML
    static bool isOOXML( const Grammar eGrammar )
    {
        return extractFormulaLanguage( eGrammar) ==
            css::sheet::FormulaLanguage::OOXML;
    }

    /// If grammar has an Excel syntax, determined by address convention.
    static bool isExcelSyntax( const Grammar eGrammar )
    {
        AddressConvention eConv = extractRefConvention( eGrammar );
        switch (eConv)
        {
            case FormulaGrammar::AddressConvention::CONV_XL_A1:
            case FormulaGrammar::AddressConvention::CONV_XL_R1C1:
            case FormulaGrammar::AddressConvention::CONV_XL_OOX:
                return true;
            default:
                return false;
        }
    }

};

} // formula


#endif // INCLUDED_FORMULA_GRAMMAR_HXX

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