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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef _FX_RTFBREAK
#define _FX_RTFBREAK
class IFX_Unknown;
class IFX_Font;
class CFX_Char;
class CFX_RTFChar;
class CFX_RTFBreakPiece;
class IFX_RTFBreak;
#define FX_RTFBREAKPOLICY_None					0x00
#define FX_RTFBREAKPOLICY_SpaceBreak			0x01
#define FX_RTFBREAKPOLICY_NumberBreak			0x02
#define FX_RTFBREAKPOLICY_InfixBreak			0x04
#define FX_RTFBREAKPOLICY_TabBreak				0x08
#define FX_RTFBREAKPOLICY_OrphanPositionedTab	0x10
#define FX_RTFBREAK_None						0x00
#define FX_RTFBREAK_PieceBreak					0x01
#define FX_RTFBREAK_LineBreak					0x02
#define FX_RTFBREAK_ParagraphBreak				0x03
#define FX_RTFBREAK_PageBreak					0x04
#define FX_RTFLAYOUTSTYLE_Pagination			0x01
#define FX_RTFLAYOUTSTYLE_VerticalLayout		0x02
#define FX_RTFLAYOUTSTYLE_VerticalChars			0x04
#define FX_RTFLAYOUTSTYLE_LineDirection			0x08
#define FX_RTFLAYOUTSTYLE_ExpandTab				0x10
#define FX_RTFLAYOUTSTYLE_ArabicNumber			0x20
#define FX_RTFLAYOUTSTYLE_SingleLine			0x40
#define FX_RTFLAYOUTSTYLE_MBCSCode				0x80
#define FX_RTFCHARSTYLE_Alignment				0x000F
#define FX_RTFCHARSTYLE_ArabicNumber			0x0010
#define FX_RTFCHARSTYLE_ArabicShadda			0x0020
#define FX_RTFCHARSTYLE_OddBidiLevel			0x0040
#define FX_RTFCHARSTYLE_RTLReadingOrder			0x0080
#define FX_RTFCHARSTYLE_ArabicContext			0x0300
#define FX_RTFCHARSTYLE_ArabicIndic				0x0400
#define FX_RTFCHARSTYLE_ArabicComma				0x0800
#define FX_RTFLINEALIGNMENT_Left				0
#define FX_RTFLINEALIGNMENT_Center				1
#define FX_RTFLINEALIGNMENT_Right				2
#define FX_RTFLINEALIGNMENT_Justified			(1 << 2)
#define FX_RTFLINEALIGNMENT_Distributed			(2 << 2)
#define FX_RTFLINEALIGNMENT_JustifiedLeft		(FX_RTFLINEALIGNMENT_Left | FX_RTFLINEALIGNMENT_Justified)
#define FX_RTFLINEALIGNMENT_JustifiedCenter		(FX_RTFLINEALIGNMENT_Center | FX_RTFLINEALIGNMENT_Justified)
#define FX_RTFLINEALIGNMENT_JustifiedRight		(FX_RTFLINEALIGNMENT_Right | FX_RTFLINEALIGNMENT_Justified)
#define FX_RTFLINEALIGNMENT_DistributedLeft		(FX_RTFLINEALIGNMENT_Left | FX_RTFLINEALIGNMENT_Distributed)
#define FX_RTFLINEALIGNMENT_DistributedCenter	(FX_RTFLINEALIGNMENT_Center | FX_RTFLINEALIGNMENT_Distributed)
#define FX_RTFLINEALIGNMENT_DistributedRight	(FX_RTFLINEALIGNMENT_Right | FX_RTFLINEALIGNMENT_Distributed)
#define FX_RTFLINEALIGNMENT_LowerMask			0x03
#define FX_RTFLINEALIGNMENT_HigherMask			0x0C
typedef struct _FX_RTFTEXTOBJ {
    _FX_RTFTEXTOBJ()
    {
        pStr = NULL;
        pWidths = NULL;
        iLength = 0;
        pFont = NULL;
        fFontSize = 12.0f;
        dwLayoutStyles = 0;
        iCharRotation = 0;
        iBidiLevel = 0;
        pRect = NULL;
        wLineBreakChar = L'\n';
        iHorizontalScale = 100;
        iVerticalScale = 100;
    }
    const FX_WCHAR*		pStr;
    int32_t		*pWidths;
    int32_t		iLength;
    IFX_Font		*pFont;
    FX_FLOAT		fFontSize;
    FX_DWORD		dwLayoutStyles;
    int32_t		iCharRotation;
    int32_t		iBidiLevel;
    FX_LPCRECTF		pRect;
    FX_WCHAR		wLineBreakChar;
    int32_t		iHorizontalScale;
    int32_t		iVerticalScale;
} FX_RTFTEXTOBJ, * FX_LPRTFTEXTOBJ;
typedef FX_RTFTEXTOBJ const * FX_LPCRTFTEXTOBJ;
class CFX_RTFPiece : public CFX_Target
{
public:
    CFX_RTFPiece() : m_dwStatus(FX_RTFBREAK_PieceBreak)
        , m_iStartPos(0)
        , m_iWidth(-1)
        , m_iStartChar(0)
        , m_iChars(0)
        , m_iBidiLevel(0)
        , m_iBidiPos(0)
        , m_iFontSize(0)
        , m_iFontHeight(0)
        , m_iHorizontalScale(100)
        , m_iVerticalScale(100)
        , m_dwLayoutStyles(0)
        , m_dwIdentity(0)
        , m_pChars(NULL)
        , m_pUserData(NULL)
    {
    }
    ~CFX_RTFPiece()
    {
        Reset();
    }
    void AppendChar(const CFX_RTFChar &tc)
    {
        FXSYS_assert(m_pChars != NULL);
        m_pChars->Add(tc);
        if (m_iWidth < 0) {
            m_iWidth = tc.m_iCharWidth;
        } else {
            m_iWidth += tc.m_iCharWidth;
        }
        m_iChars ++;
    }
    int32_t GetEndPos() const
    {
        return m_iWidth < 0 ? m_iStartPos : m_iStartPos + m_iWidth;
    }
    int32_t GetLength() const
    {
        return m_iChars;
    }
    int32_t GetEndChar() const
    {
        return m_iStartChar + m_iChars;
    }
    CFX_RTFChar& GetChar(int32_t index)
    {
        FXSYS_assert(index > -1 && index < m_iChars && m_pChars != NULL);
        return *m_pChars->GetDataPtr(m_iStartChar + index);
    }
    CFX_RTFChar* GetCharPtr(int32_t index) const
    {
        FXSYS_assert(index > -1 && index < m_iChars && m_pChars != NULL);
        return m_pChars->GetDataPtr(m_iStartChar + index);
    }
    void GetString (FX_WCHAR* pText) const
    {
        FXSYS_assert(pText != NULL);
        int32_t iEndChar = m_iStartChar + m_iChars;
        CFX_RTFChar *pChar;
        for (int32_t i = m_iStartChar; i < iEndChar; i ++) {
            pChar = m_pChars->GetDataPtr(i);
            *pText ++ = (FX_WCHAR)pChar->m_wCharCode;
        }
    }
    void GetString(CFX_WideString &wsText) const
    {
        FX_WCHAR* pText = wsText.GetBuffer(m_iChars);
        GetString(pText);
        wsText.ReleaseBuffer(m_iChars);
    }
    void GetWidths(int32_t *pWidths) const
    {
        FXSYS_assert(pWidths != NULL);
        int32_t iEndChar = m_iStartChar + m_iChars;
        CFX_RTFChar *pChar;
        for (int32_t i = m_iStartChar; i < iEndChar; i ++) {
            pChar = m_pChars->GetDataPtr(i);
            *pWidths ++ = pChar->m_iCharWidth;
        }
    }
    void Reset()
    {
        m_dwStatus = FX_RTFBREAK_PieceBreak;
        if (m_iWidth > -1) {
            m_iStartPos += m_iWidth;
        }
        m_iWidth = -1;
        m_iStartChar += m_iChars;
        m_iChars = 0;
        m_iBidiLevel = 0;
        m_iBidiPos = 0;
        m_iHorizontalScale = 100;
        m_iVerticalScale = 100;
    }
    FX_DWORD			m_dwStatus;
    int32_t			m_iStartPos;
    int32_t			m_iWidth;
    int32_t			m_iStartChar;
    int32_t			m_iChars;
    int32_t			m_iBidiLevel;
    int32_t			m_iBidiPos;
    int32_t			m_iFontSize;
    int32_t			m_iFontHeight;
    int32_t			m_iHorizontalScale;
    int32_t			m_iVerticalScale;
    FX_DWORD			m_dwLayoutStyles;
    FX_DWORD			m_dwIdentity;
    CFX_RTFCharArray	*m_pChars;
    IFX_Unknown			*m_pUserData;
};
typedef CFX_BaseArrayTemplate<CFX_RTFPiece> CFX_RTFPieceArray;
class IFX_RTFBreak
{
public:
    static IFX_RTFBreak*	Create(FX_DWORD dwPolicies);
    virtual ~IFX_RTFBreak() {}
    virtual void			Release() = 0;
    virtual void			SetLineWidth(FX_FLOAT fLineStart, FX_FLOAT fLineEnd) = 0;
    virtual void			SetLinePos(FX_FLOAT fLinePos) = 0;
    virtual FX_DWORD		GetLayoutStyles() const = 0;
    virtual void			SetLayoutStyles(FX_DWORD dwLayoutStyles) = 0;
    virtual void			SetFont(IFX_Font *pFont) = 0;
    virtual void			SetFontSize(FX_FLOAT fFontSize) = 0;
    virtual void			SetTabWidth(FX_FLOAT fTabWidth) = 0;
    virtual void			AddPositionedTab(FX_FLOAT fTabPos) = 0;
    virtual void			SetPositionedTabs(const CFX_FloatArray &tabs) = 0;
    virtual void			ClearPositionedTabs() = 0;
    virtual void			SetDefaultChar(FX_WCHAR wch) = 0;
    virtual void			SetLineBreakChar(FX_WCHAR wch) = 0;
    virtual void			SetLineBreakTolerance(FX_FLOAT fTolerance) = 0;
    virtual void			SetHorizontalScale(int32_t iScale) = 0;
    virtual void			SetVerticalScale(int32_t iScale) = 0;
    virtual void			SetCharRotation(int32_t iCharRotation) = 0;
    virtual void			SetCharSpace(FX_FLOAT fCharSpace) = 0;
    virtual void			SetWordSpace(FX_BOOL bDefault, FX_FLOAT fWordSpace) = 0;
    virtual void			SetReadingOrder(FX_BOOL bRTL = FALSE) = 0;
    virtual void			SetAlignment(int32_t iAlignment = FX_RTFLINEALIGNMENT_Left) = 0;
    virtual void			SetUserData(IFX_Unknown *pUserData) = 0;
    virtual FX_DWORD					AppendChar(FX_WCHAR wch) = 0;
    virtual FX_DWORD					EndBreak(FX_DWORD dwStatus = FX_RTFBREAK_PieceBreak) = 0;
    virtual int32_t					CountBreakPieces() const = 0;
    virtual const CFX_RTFPiece*			GetBreakPiece(int32_t index) const = 0;
    virtual void						GetLineRect(CFX_RectF &rect) const = 0;
    virtual void						ClearBreakPieces() = 0;
    virtual void			Reset() = 0;
    virtual int32_t		GetDisplayPos(FX_LPCRTFTEXTOBJ pText, FXTEXT_CHARPOS *pCharPos, FX_BOOL bCharCode = FALSE, CFX_WideString *pWSForms = NULL, FX_AdjustCharDisplayPos pAdjustPos = NULL) const = 0;
    virtual int32_t		GetCharRects(FX_LPCRTFTEXTOBJ pText, CFX_RectFArray &rtArray, FX_BOOL bCharBBox = FALSE) const = 0;
};
#endif