scriptinfo.hxx

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#ifndef INCLUDED_SW_SOURCE_CORE_INC_SCRIPTINFO_HXX
#define INCLUDED_SW_SOURCE_CORE_INC_SCRIPTINFO_HXX

#include <vector>
#include <deque>
#include <unordered_set>
#include <rtl/ustrbuf.hxx>
#include <i18nlangtag/lang.h>
#include "TextFrameIndex.hxx"

class SwTextNode;
class SwTextFrame;
class Point;
class MultiSelection;
enum class SwFontScript;
namespace sw { struct MergedPara; }

#define SPACING_PRECISION_FACTOR 100

// encapsulates information about script changes
class SwScriptInfo
{
public:
    enum CompType { KANA, SPECIAL_LEFT, SPECIAL_RIGHT, NONE, SPECIAL_MIDDLE};

private:
    struct ScriptChangeInfo
    {
        TextFrameIndex position; 
        sal_uInt8       type;     
        ScriptChangeInfo(TextFrameIndex pos, sal_uInt8 typ) : position(pos), type(typ) {};
    };
    //TODO - This is sorted, so should probably be a std::set rather than vector.
    //       But we also use random access (probably unnecessarily).
    std::vector<ScriptChangeInfo> m_ScriptChanges;
    struct DirectionChangeInfo
    {
        TextFrameIndex const position; 
        sal_uInt8 const       type;     
        DirectionChangeInfo(TextFrameIndex pos, sal_uInt8 typ) : position(pos), type(typ) {};
    };
    std::vector<DirectionChangeInfo> m_DirectionChanges;
    std::deque<TextFrameIndex> m_Kashida;
    std::unordered_set<size_t> m_KashidaInvalid;
    std::deque<TextFrameIndex> m_NoKashidaLine;
    std::deque<TextFrameIndex> m_NoKashidaLineEnd;
    std::vector<TextFrameIndex> m_HiddenChg;
    struct CompressionChangeInfo
    {
        TextFrameIndex position; 
        TextFrameIndex length;   
        CompType  type;     
        CompressionChangeInfo(TextFrameIndex pos, TextFrameIndex len, CompType typ) : position(pos), length(len), type(typ) {};
    };
    std::vector<CompressionChangeInfo> m_CompressionChanges;
#ifdef DBG_UTIL
    CompType DbgCompType(const TextFrameIndex nPos) const;
#endif

    TextFrameIndex m_nInvalidityPos;
    sal_uInt8 m_nDefaultDir;

    void UpdateBidiInfo( const OUString& rText );
    bool IsKashidaValid(size_t nKashPos) const;
    // returns true if nKashPos is newly marked invalid
    bool MarkKashidaInvalid(size_t nKashPos);
    void ClearKashidaInvalid(size_t nKashPos);
    bool MarkOrClearKashidaInvalid(TextFrameIndex nStt, TextFrameIndex nLen,
            bool bMark, sal_Int32 nMarkCount);
    bool IsKashidaLine(TextFrameIndex nCharIdx) const;
    // examines the range [ nStart, nStart + nEnd ] if there are kanas
    // returns start index of kana entry in array, otherwise SAL_MAX_SIZE
    size_t HasKana(TextFrameIndex nStart, TextFrameIndex nEnd) const;

public:

    SwScriptInfo();
    ~SwScriptInfo();

    // determines script changes
    void InitScriptInfo(const SwTextNode& rNode, sw::MergedPara const* pMerged, bool bRTL);
    void InitScriptInfo(const SwTextNode& rNode, sw::MergedPara const* pMerged);

    // set/get position from which data is invalid
    void SetInvalidityA(const TextFrameIndex nPos)
    {
        if (nPos < m_nInvalidityPos)
            m_nInvalidityPos = nPos;
    }
    TextFrameIndex GetInvalidityA() const
    {
        return m_nInvalidityPos;
    }

    // get default direction for paragraph
    sal_uInt8 GetDefaultDir() const { return m_nDefaultDir; };

    // array operations, nCnt refers to array position
    size_t CountScriptChg() const { return m_ScriptChanges.size(); }
    TextFrameIndex GetScriptChg(const size_t nCnt) const
    {
        assert(nCnt < m_ScriptChanges.size());
        return m_ScriptChanges[nCnt].position;
    }
    sal_uInt8 GetScriptType( const size_t nCnt ) const
    {
        assert( nCnt < m_ScriptChanges.size());
        return m_ScriptChanges[nCnt].type;
    }

    size_t CountDirChg() const { return m_DirectionChanges.size(); }
    TextFrameIndex GetDirChg(const size_t nCnt) const
    {
        assert(nCnt < m_DirectionChanges.size());
        return m_DirectionChanges[ nCnt ].position;
    }
    sal_uInt8 GetDirType( const size_t nCnt ) const
    {
        assert(nCnt < m_DirectionChanges.size());
        return m_DirectionChanges[ nCnt ].type;
    }

    size_t CountKashida() const
    {
        return m_Kashida.size();
    }

    TextFrameIndex GetKashida(const size_t nCnt) const
    {
        assert(nCnt < m_Kashida.size());
        return m_Kashida[nCnt];
    }

    size_t CountCompChg() const { return m_CompressionChanges.size(); };
    TextFrameIndex GetCompStart(const size_t nCnt) const
    {
        assert(nCnt < m_CompressionChanges.size());
        return m_CompressionChanges[ nCnt ].position;
    }
    TextFrameIndex GetCompLen(const size_t nCnt) const
    {
        assert(nCnt < m_CompressionChanges.size());
        return m_CompressionChanges[ nCnt ].length;
    }
    CompType GetCompType( const size_t nCnt ) const
    {
        assert(nCnt < m_CompressionChanges.size());
        return m_CompressionChanges[ nCnt ].type;
    }

    size_t CountHiddenChg() const { return m_HiddenChg.size(); };
    TextFrameIndex GetHiddenChg(const size_t nCnt) const
    {
        assert(nCnt < m_HiddenChg.size());
        return m_HiddenChg[ nCnt ];
    }
    TextFrameIndex NextHiddenChg(TextFrameIndex nPos) const;
    static void CalcHiddenRanges(const SwTextNode& rNode, MultiSelection& rHiddenMulti);
    static void selectHiddenTextProperty(const SwTextNode& rNode, MultiSelection &rHiddenMulti);
    static void selectRedLineDeleted(const SwTextNode& rNode, MultiSelection &rHiddenMulti, bool bSelect=true);

    // "high" level operations, nPos refers to string position
    TextFrameIndex NextScriptChg(TextFrameIndex nPos) const;
    sal_Int16 ScriptType(const TextFrameIndex nPos) const;

    // Returns the position of the next direction level change.
    // If bLevel is set, the position of the next level which is smaller
    // than the level at position nPos is returned. This is required to
    // obtain the end of a SwBidiPortion
    TextFrameIndex NextDirChg(const TextFrameIndex nPos,
                           const sal_uInt8* pLevel = nullptr) const;
    sal_uInt8 DirType(const TextFrameIndex nPos) const;

    // HIDDEN TEXT STUFF START

    static bool GetBoundsOfHiddenRange( const SwTextNode& rNode, sal_Int32 nPos,
                                        sal_Int32& rnStartPos, sal_Int32& rnEndPos,
                                        std::vector<sal_Int32>* pList = nullptr );
    bool GetBoundsOfHiddenRange(TextFrameIndex nPos, TextFrameIndex & rnStartPos,
                                TextFrameIndex & rnEndPos) const;

    static bool IsInHiddenRange( const SwTextNode& rNode, sal_Int32 nPos );

    static sal_Int32 MaskHiddenRanges(
            const SwTextNode& rNode, OUStringBuffer& rText,
                                    const sal_Int32 nStt, const sal_Int32 nEnd,
                                    const sal_Unicode cChar );

    static void DeleteHiddenRanges( SwTextNode& rNode );

    // HIDDEN TEXT STUFF END

    // modifies the kerning array according to a given compress value
    long Compress( long* pKernArray, TextFrameIndex nIdx, TextFrameIndex nLen,
                   const sal_uInt16 nCompress, const sal_uInt16 nFontHeight,
                   const bool bCentered,
                   Point* pPoint = nullptr ) const;

    sal_Int32 KashidaJustify( long* pKernArray, long* pScrArray,
          TextFrameIndex nStt, TextFrameIndex nLen, long nSpaceAdd = 0) const;

    void ClearKashidaInvalid(TextFrameIndex const nStt, TextFrameIndex const nLen)
    {
        MarkOrClearKashidaInvalid(nStt, nLen, false, 0);
    }

    void MarkKashidasInvalid(sal_Int32 nCnt, const TextFrameIndex* pKashidaPositions);

    bool MarkKashidasInvalid(sal_Int32 const nCnt,
            TextFrameIndex const nStt, TextFrameIndex const nLen)
    {
        return MarkOrClearKashidaInvalid(nStt, nLen, true, nCnt);
    }

    void GetKashidaPositions(TextFrameIndex nStt, TextFrameIndex nLen,
                             std::vector<TextFrameIndex>& rKashidaPosition);

    void SetNoKashidaLine(TextFrameIndex nStt, TextFrameIndex nLen);

    void ClearNoKashidaLine(TextFrameIndex nStt, TextFrameIndex nLen);

    static bool IsArabicText(const OUString& rText, TextFrameIndex nStt, TextFrameIndex nLen);

    static TextFrameIndex ThaiJustify( const OUString& rText, long* pKernArray,
                                  long* pScrArray, TextFrameIndex nIdx,
                                  TextFrameIndex nLen,
                                  TextFrameIndex nNumberOfBlanks = TextFrameIndex(0),
                                  long nSpaceAdd = 0 );

    static TextFrameIndex CountCJKCharacters(const OUString &rText,
            TextFrameIndex nPos, TextFrameIndex nEnd, LanguageType aLang);

    static void CJKJustify( const OUString& rText, long* pKernArray,
                                  long* pScrArray, TextFrameIndex nStt,
                                  TextFrameIndex nLen, LanguageType aLang,
                                  long nSpaceAdd, bool bIsSpaceStop );

    static SwScriptInfo* GetScriptInfo( const SwTextNode& rNode,
                                        SwTextFrame const** o_pFrame = nullptr,
                                        bool bAllowInvalid = false);

    SwFontScript WhichFont(TextFrameIndex nIdx) const;
    static SwFontScript WhichFont(sal_Int32 nIdx, OUString const & rText);
};

#endif

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