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PL286/external/pdfium/xfa/fgas/layout/fgas_textbreak.h

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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 XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_
#define XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_
#include <deque>
#include <memory>
#include <vector>
#include "core/fxcrt/fx_ucd.h"
#include "core/fxge/cfx_renderdevice.h"
#include "third_party/base/stl_util.h"
#include "xfa/fgas/crt/fgas_utils.h"
class CFX_Char;
class CFGAS_GEFont;
class CFX_TxtChar;
class CFX_TxtPiece;
class IFX_TxtAccess;
struct FDE_TEXTEDITPIECE;
#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 FX_TPO {
int32_t index;
int32_t pos;
bool operator<(const FX_TPO& that) const { return pos < that.pos; }
};
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;
CFX_RetainPtr<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;
bool bSkipSpace;
};
class CFX_TxtPiece {
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)[m_iStartChar + index];
}
void GetString(FX_WCHAR* pText) const {
ASSERT(pText);
int32_t iEndChar = m_iStartChar + m_iChars;
for (int32_t i = m_iStartChar; i < iEndChar; i++)
*pText++ = static_cast<FX_WCHAR>((*m_pChars)[i].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;
for (int32_t i = m_iStartChar; i < iEndChar; i++)
*pWidths++ = (*m_pChars)[i].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;
std::vector<CFX_TxtChar>* m_pChars;
void* m_pUserData;
};
typedef CFX_BaseArrayTemplate<CFX_TxtPiece> CFX_TxtPieceArray;
class CFX_TxtLine {
public:
explicit CFX_TxtLine(int32_t iBlockSize);
~CFX_TxtLine();
int32_t CountChars() const {
return pdfium::CollectionSize<int32_t>(*m_pLineChars);
}
CFX_TxtChar* GetCharPtr(int32_t index) const {
ASSERT(index >= 0 &&
index < pdfium::CollectionSize<int32_t>(*m_pLineChars));
return &(*m_pLineChars)[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 = pdfium::CollectionSize<int32_t>(*m_pLineChars);
FX_WCHAR* pBuf = wsStr.GetBuffer(iCount);
for (int32_t i = 0; i < iCount; i++)
*pBuf++ = static_cast<FX_WCHAR>((*m_pLineChars)[i].m_wCharCode);
wsStr.ReleaseBuffer(iCount);
}
void RemoveAll(bool bLeaveMemory = false) {
m_pLineChars->clear();
m_pLinePieces->RemoveAll(bLeaveMemory);
m_iWidth = 0;
m_iArabicChars = 0;
}
std::unique_ptr<std::vector<CFX_TxtChar>> 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:
explicit 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(const CFX_RetainPtr<CFGAS_GEFont>& pFont);
void SetFontSize(FX_FLOAT fFontSize);
void SetTabWidth(FX_FLOAT fTabWidth, bool bEquidistant);
void SetDefaultChar(FX_WCHAR wch);
void SetParagraphBreakChar(FX_WCHAR wch);
void SetLineBreakTolerance(FX_FLOAT fTolerance);
void SetHorizontalScale(int32_t iScale);
void SetCharRotation(int32_t iCharRotation);
void SetCharSpace(FX_FLOAT fCharSpace);
void SetAlignment(int32_t iAlignment);
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 CountBreakPieces() const;
const CFX_TxtPiece* GetBreakPiece(int32_t index) const;
void ClearBreakPieces();
void Reset();
int32_t GetDisplayPos(const FX_TXTRUN* pTxtRun,
FXTEXT_CHARPOS* pCharPos,
bool bCharCode = false,
CFX_WideString* pWSForms = nullptr) const;
std::vector<CFX_RectF> GetCharRects(const FX_TXTRUN* pTxtRun,
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 FontChanged();
void SetBreakStatus();
int32_t GetLineRotation(uint32_t dwStyles) const;
CFX_TxtChar* GetLastChar(int32_t index, bool bOmitChar = true) const;
CFX_TxtLine* GetTxtLine() const;
CFX_TxtPieceArray* GetTxtPieces() const;
FX_CHARTYPE GetUnifiedCharType(FX_CHARTYPE dwType) const;
void ResetArabicContext();
void ResetContextCharStyles();
void EndBreak_UpdateArabicShapes();
bool EndBreak_SplitLine(CFX_TxtLine* pNextLine,
bool bAllChars,
uint32_t dwStatus);
void EndBreak_BidiLine(std::deque<FX_TPO>* tpos, uint32_t dwStatus);
void EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
bool bAllChars,
uint32_t dwStatus);
int32_t GetBreakPos(std::vector<CFX_TxtChar>& ca,
int32_t& iEndPos,
bool bAllChars = false,
bool bOnlyBrk = false);
void SplitTextLine(CFX_TxtLine* pCurLine,
CFX_TxtLine* pNextLine,
bool bAllChars = false);
uint32_t m_dwPolicies;
bool m_bPagination;
int32_t m_iLineWidth;
uint32_t m_dwLayoutStyles;
bool m_bVertical;
bool m_bArabicContext;
bool m_bArabicShapes;
bool m_bRTL;
bool m_bSingleLine;
bool m_bCombText;
int32_t m_iArabicContext;
int32_t m_iCurArabicContext;
CFX_RetainPtr<CFGAS_GEFont> m_pFont;
int32_t m_iFontSize;
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;
bool m_bCurRTL;
int32_t m_iCurAlignment;
bool m_bArabicNumber;
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_iCharSpace;
};
#endif // XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_