// 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 XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_ #define XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_ #include <memory> #include "core/fxcrt/include/fx_ucd.h" #include "core/fxge/include/cfx_renderdevice.h" #include "xfa/fgas/crt/fgas_utils.h" #include "xfa/fgas/layout/fgas_unicode.h" class CFX_Char; class CFGAS_GEFont; class CFX_TxtChar; class CFX_TxtPiece; class IFX_TxtAccess; #define FX_TXTBREAKPOLICY_None 0x00 #define FX_TXTBREAKPOLICY_Pagination 0x01 #define FX_TXTBREAKPOLICY_SpaceBreak 0x02 #define FX_TXTBREAKPOLICY_NumberBreak 0x04 #define FX_TXTBREAK_None 0x00 #define FX_TXTBREAK_PieceBreak 0x01 #define FX_TXTBREAK_LineBreak 0x02 #define FX_TXTBREAK_ParagraphBreak 0x03 #define FX_TXTBREAK_PageBreak 0x04 #define FX_TXTBREAK_ControlChar 0x10 #define FX_TXTBREAK_BreakChar 0x20 #define FX_TXTBREAK_UnknownChar 0x40 #define FX_TXTBREAK_RemoveChar 0x80 #define FX_TXTLAYOUTSTYLE_MutipleFormat 0x0001 #define FX_TXTLAYOUTSTYLE_VerticalLayout 0x0002 #define FX_TXTLAYOUTSTYLE_VerticalChars 0x0004 #define FX_TXTLAYOUTSTYLE_ReverseLine 0x0008 #define FX_TXTLAYOUTSTYLE_ArabicContext 0x0010 #define FX_TXTLAYOUTSTYLE_ArabicShapes 0x0020 #define FX_TXTLAYOUTSTYLE_RTLReadingOrder 0x0040 #define FX_TXTLAYOUTSTYLE_ExpandTab 0x0100 #define FX_TXTLAYOUTSTYLE_SingleLine 0x0200 #define FX_TXTLAYOUTSTYLE_CombText 0x0400 #define FX_TXTCHARSTYLE_Alignment 0x000F #define FX_TXTCHARSTYLE_ArabicNumber 0x0010 #define FX_TXTCHARSTYLE_ArabicShadda 0x0020 #define FX_TXTCHARSTYLE_OddBidiLevel 0x0040 #define FX_TXTCHARSTYLE_RTLReadingOrder 0x0080 #define FX_TXTCHARSTYLE_ArabicContext 0x0300 #define FX_TXTCHARSTYLE_ArabicIndic 0x0400 #define FX_TXTCHARSTYLE_ArabicComma 0x0800 #define FX_TXTLINEALIGNMENT_Left 0 #define FX_TXTLINEALIGNMENT_Center 1 #define FX_TXTLINEALIGNMENT_Right 2 #define FX_TXTLINEALIGNMENT_Justified (1 << 2) #define FX_TXTLINEALIGNMENT_Distributed (2 << 2) #define FX_TXTLINEALIGNMENT_JustifiedLeft \ (FX_TXTLINEALIGNMENT_Left | FX_TXTLINEALIGNMENT_Justified) #define FX_TXTLINEALIGNMENT_JustifiedCenter \ (FX_TXTLINEALIGNMENT_Center | FX_TXTLINEALIGNMENT_Justified) #define FX_TXTLINEALIGNMENT_JustifiedRight \ (FX_TXTLINEALIGNMENT_Right | FX_TXTLINEALIGNMENT_Justified) #define FX_TXTLINEALIGNMENT_DistributedLeft \ (FX_TXTLINEALIGNMENT_Left | FX_TXTLINEALIGNMENT_Distributed) #define FX_TXTLINEALIGNMENT_DistributedCenter \ (FX_TXTLINEALIGNMENT_Center | FX_TXTLINEALIGNMENT_Distributed) #define FX_TXTLINEALIGNMENT_DistributedRight \ (FX_TXTLINEALIGNMENT_Right | FX_TXTLINEALIGNMENT_Distributed) #define FX_TXTLINEALIGNMENT_LowerMask 0x03 #define FX_TXTLINEALIGNMENT_HigherMask 0x0C #define FX_TXTBREAK_MinimumTabWidth 160000 struct FDE_TEXTEDITPIECE; class IFX_TxtAccess { public: virtual ~IFX_TxtAccess() {} virtual FX_WCHAR GetChar(const FDE_TEXTEDITPIECE* pIdentity, int32_t index) const = 0; virtual int32_t GetWidth(const FDE_TEXTEDITPIECE* pIdentity, int32_t index) const = 0; }; struct FX_TXTRUN { FX_TXTRUN(); FX_TXTRUN(const FX_TXTRUN& other); ~FX_TXTRUN(); IFX_TxtAccess* pAccess; const FDE_TEXTEDITPIECE* pIdentity; CFX_WideString wsStr; int32_t* pWidths; int32_t iLength; CFGAS_GEFont* pFont; FX_FLOAT fFontSize; uint32_t dwStyles; int32_t iHorizontalScale; int32_t iVerticalScale; int32_t iCharRotation; uint32_t dwCharStyles; const CFX_RectF* pRect; FX_WCHAR wLineBreakChar; FX_BOOL bSkipSpace; }; class CFX_TxtPiece : public CFX_Target { public: CFX_TxtPiece(); 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_TxtChar* GetCharPtr(int32_t index) const { ASSERT(index > -1 && index < m_iChars && m_pChars); return m_pChars->GetDataPtr(m_iStartChar + index); } void GetString(FX_WCHAR* pText) const { ASSERT(pText); int32_t iEndChar = m_iStartChar + m_iChars; CFX_Char* 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 { ASSERT(pWidths); int32_t iEndChar = m_iStartChar + m_iChars; CFX_Char* pChar; for (int32_t i = m_iStartChar; i < iEndChar; i++) { pChar = m_pChars->GetDataPtr(i); *pWidths++ = pChar->m_iCharWidth; } } uint32_t 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_iHorizontalScale; int32_t m_iVerticalScale; uint32_t m_dwCharStyles; CFX_TxtCharArray* m_pChars; void* m_pUserData; }; typedef CFX_BaseArrayTemplate<CFX_TxtPiece> CFX_TxtPieceArray; class CFX_TxtLine { public: CFX_TxtLine(int32_t iBlockSize); ~CFX_TxtLine(); int32_t CountChars() const { return m_pLineChars->GetSize(); } CFX_TxtChar* GetCharPtr(int32_t index) const { ASSERT(index > -1 && index < m_pLineChars->GetSize()); return m_pLineChars->GetDataPtr(index); } int32_t CountPieces() const { return m_pLinePieces->GetSize(); } CFX_TxtPiece* GetPiecePtr(int32_t index) const { ASSERT(index > -1 && index < m_pLinePieces->GetSize()); return m_pLinePieces->GetPtrAt(index); } void GetString(CFX_WideString& wsStr) const { int32_t iCount = m_pLineChars->GetSize(); FX_WCHAR* pBuf = wsStr.GetBuffer(iCount); CFX_Char* pChar; for (int32_t i = 0; i < iCount; i++) { pChar = m_pLineChars->GetDataPtr(i); *pBuf++ = (FX_WCHAR)pChar->m_wCharCode; } wsStr.ReleaseBuffer(iCount); } void RemoveAll(FX_BOOL bLeaveMemory = FALSE) { m_pLineChars->RemoveAll(); m_pLinePieces->RemoveAll(bLeaveMemory); m_iWidth = 0; m_iArabicChars = 0; } std::unique_ptr<CFX_TxtCharArray> m_pLineChars; std::unique_ptr<CFX_TxtPieceArray> m_pLinePieces; int32_t m_iStart; int32_t m_iWidth; int32_t m_iArabicChars; }; class CFX_TxtBreak { public: CFX_TxtBreak(uint32_t dwPolicies); ~CFX_TxtBreak(); void SetLineWidth(FX_FLOAT fLineWidth); void SetLinePos(FX_FLOAT fLinePos); uint32_t GetLayoutStyles() const { return m_dwLayoutStyles; } void SetLayoutStyles(uint32_t dwLayoutStyles); void SetFont(CFGAS_GEFont* pFont); void SetFontSize(FX_FLOAT fFontSize); void SetTabWidth(FX_FLOAT fTabWidth, FX_BOOL bEquidistant); void SetDefaultChar(FX_WCHAR wch); void SetParagraphBreakChar(FX_WCHAR wch); void SetLineBreakTolerance(FX_FLOAT fTolerance); void SetHorizontalScale(int32_t iScale); void SetVerticalScale(int32_t iScale); void SetCharRotation(int32_t iCharRotation); void SetCharSpace(FX_FLOAT fCharSpace); void SetAlignment(int32_t iAlignment); uint32_t GetContextCharStyles() const; void SetContextCharStyles(uint32_t dwCharStyles); void SetCombWidth(FX_FLOAT fCombWidth); void SetUserData(void* pUserData); uint32_t AppendChar(FX_WCHAR wch); uint32_t EndBreak(uint32_t dwStatus = FX_TXTBREAK_PieceBreak); int32_t CountBreakChars() const; int32_t CountBreakPieces() const; const CFX_TxtPiece* GetBreakPiece(int32_t index) const; void ClearBreakPieces(); void Reset(); int32_t GetDisplayPos(const FX_TXTRUN* pTxtRun, FXTEXT_CHARPOS* pCharPos, FX_BOOL bCharCode = FALSE, CFX_WideString* pWSForms = nullptr, FX_AdjustCharDisplayPos pAdjustPos = nullptr) const; int32_t GetCharRects(const FX_TXTRUN* pTxtRun, CFX_RectFArray& rtArray, FX_BOOL bCharBBox = FALSE) const; void AppendChar_PageLoad(CFX_TxtChar* pCurChar, uint32_t dwProps); uint32_t AppendChar_Combination(CFX_TxtChar* pCurChar, int32_t iRotation); uint32_t AppendChar_Tab(CFX_TxtChar* pCurChar, int32_t iRotation); uint32_t AppendChar_Control(CFX_TxtChar* pCurChar, int32_t iRotation); uint32_t AppendChar_Arabic(CFX_TxtChar* pCurChar, int32_t iRotation); uint32_t AppendChar_Others(CFX_TxtChar* pCurChar, int32_t iRotation); private: void SetBreakStatus(); int32_t GetLineRotation(uint32_t dwStyles) const; CFX_TxtChar* GetLastChar(int32_t index, FX_BOOL bOmitChar = TRUE) const; CFX_TxtLine* GetTxtLine(FX_BOOL bReady) const; CFX_TxtPieceArray* GetTxtPieces(FX_BOOL bReady) const; FX_CHARTYPE GetUnifiedCharType(FX_CHARTYPE dwType) const; void ResetArabicContext(); void ResetContextCharStyles(); void EndBreak_UpdateArabicShapes(); FX_BOOL EndBreak_SplitLine(CFX_TxtLine* pNextLine, FX_BOOL bAllChars, uint32_t dwStatus); void EndBreak_BidiLine(CFX_TPOArray& tpos, uint32_t dwStatus); void EndBreak_Alignment(CFX_TPOArray& tpos, FX_BOOL bAllChars, uint32_t dwStatus); int32_t GetBreakPos(CFX_TxtCharArray& ca, int32_t& iEndPos, FX_BOOL bAllChars = FALSE, FX_BOOL bOnlyBrk = FALSE); void SplitTextLine(CFX_TxtLine* pCurLine, CFX_TxtLine* pNextLine, FX_BOOL bAllChars = FALSE); uint32_t m_dwPolicies; FX_BOOL m_bPagination; int32_t m_iLineWidth; uint32_t m_dwLayoutStyles; FX_BOOL m_bVertical; FX_BOOL m_bArabicContext; FX_BOOL m_bArabicShapes; FX_BOOL m_bRTL; FX_BOOL m_bSingleLine; FX_BOOL m_bCombText; int32_t m_iArabicContext; int32_t m_iCurArabicContext; CFGAS_GEFont* m_pFont; int32_t m_iFontSize; FX_BOOL m_bEquidistant; int32_t m_iTabWidth; FX_WCHAR m_wDefChar; FX_WCHAR m_wParagBreakChar; int32_t m_iDefChar; int32_t m_iLineRotation; int32_t m_iCharRotation; int32_t m_iRotation; int32_t m_iAlignment; uint32_t m_dwContextCharStyles; int32_t m_iCombWidth; void* m_pUserData; FX_CHARTYPE m_eCharType; FX_BOOL m_bCurRTL; int32_t m_iCurAlignment; FX_BOOL m_bArabicNumber; FX_BOOL m_bArabicComma; std::unique_ptr<CFX_TxtLine> m_pTxtLine1; std::unique_ptr<CFX_TxtLine> m_pTxtLine2; CFX_TxtLine* m_pCurLine; int32_t m_iReady; int32_t m_iTolerance; int32_t m_iHorScale; int32_t m_iVerScale; int32_t m_iCharSpace; }; #endif // XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_