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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/fde/cfde_txtedtpage.h"
#include "xfa/fgas/crt/fgas_utils.h"
class CFX_Char;
class CFGAS_GEFont;
class CFX_TxtChar;
class CFX_TxtPiece;
struct FDE_TEXTEDITPIECE;
#define FX_TXTLAYOUTSTYLE_SingleLine 0x0200
#define FX_TXTLAYOUTSTYLE_CombText 0x0400
#define FX_TXTCHARSTYLE_ArabicShadda 0x0020
#define FX_TXTCHARSTYLE_OddBidiLevel 0x0040
enum CFX_TxtLineAlignment {
CFX_TxtLineAlignment_Left = 0,
CFX_TxtLineAlignment_Center = 1 << 0,
CFX_TxtLineAlignment_Right = 1 << 1,
CFX_TxtLineAlignment_Justified = 1 << 2
};
struct FX_TPO {
int32_t index;
int32_t pos;
bool operator<(const FX_TPO& that) const { return pos < that.pos; }
};
inline bool CFX_BreakTypeNoneOrPiece(CFX_BreakType type) {
return type == CFX_BreakType::None || type == CFX_BreakType::Piece;
}
struct FX_TXTRUN {
FX_TXTRUN();
FX_TXTRUN(const FX_TXTRUN& other);
~FX_TXTRUN();
CFDE_TxtEdtPage* 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;
uint32_t dwCharStyles;
const CFX_RectF* pRect;
FX_WCHAR wLineBreakChar;
bool bSkipSpace;
};
class CFX_TxtPiece {
public:
CFX_TxtPiece();
CFX_TxtPiece(const CFX_TxtPiece& other);
~CFX_TxtPiece();
int32_t GetEndPos() const {
return m_iWidth < 0 ? m_iStartPos : m_iStartPos + m_iWidth;
}
int32_t GetLength() const { return m_iChars; }
CFX_TxtChar& GetChar(int32_t index) const {
ASSERT(index > -1 && index < m_iChars && m_pChars);
return (*m_pChars)[m_iStartChar + index];
}
CFX_WideString GetString() const {
CFX_WideString ret;
ret.Reserve(m_iChars);
for (int32_t i = m_iStartChar; i < m_iStartChar + m_iChars; i++)
ret += static_cast<FX_WCHAR>((*m_pChars)[i].m_wCharCode);
return ret;
}
CFX_BreakType 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;
};
class CFX_TxtLine {
public:
CFX_TxtLine();
~CFX_TxtLine();
int32_t CountChars() const {
return pdfium::CollectionSize<int32_t>(m_LineChars);
}
CFX_TxtChar* GetCharPtr(int32_t index) {
ASSERT(index >= 0 && index < pdfium::CollectionSize<int32_t>(m_LineChars));
return &m_LineChars[index];
}
const CFX_TxtChar* GetCharPtr(int32_t index) const {
ASSERT(index >= 0 && index < pdfium::CollectionSize<int32_t>(m_LineChars));
return &m_LineChars[index];
}
int32_t CountPieces() const {
return pdfium::CollectionSize<int32_t>(m_LinePieces);
}
const CFX_TxtPiece* GetPiecePtr(int32_t index) const {
ASSERT(index >= 0 && index < CountPieces());
return &m_LinePieces[index];
}
void GetString(CFX_WideString& wsStr) const {
int32_t iCount = pdfium::CollectionSize<int32_t>(m_LineChars);
FX_WCHAR* pBuf = wsStr.GetBuffer(iCount);
for (int32_t i = 0; i < iCount; i++)
*pBuf++ = static_cast<FX_WCHAR>(m_LineChars[i].m_wCharCode);
wsStr.ReleaseBuffer(iCount);
}
void Clear() {
m_LineChars.clear();
m_LinePieces.clear();
m_iWidth = 0;
m_iArabicChars = 0;
}
std::vector<CFX_TxtChar> m_LineChars;
std::vector<CFX_TxtPiece> m_LinePieces;
int32_t m_iStart;
int32_t m_iWidth;
int32_t m_iArabicChars;
};
class CFX_TxtBreak {
public:
CFX_TxtBreak();
~CFX_TxtBreak();
void SetLineWidth(FX_FLOAT fLineWidth);
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 SetCharSpace(FX_FLOAT fCharSpace);
void SetAlignment(int32_t iAlignment);
void SetCombWidth(FX_FLOAT fCombWidth);
CFX_BreakType EndBreak(CFX_BreakType dwStatus);
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);
CFX_BreakType AppendChar(FX_WCHAR wch);
CFX_BreakType AppendChar_Combination(CFX_TxtChar* pCurChar);
CFX_BreakType AppendChar_Tab(CFX_TxtChar* pCurChar);
CFX_BreakType AppendChar_Control(CFX_TxtChar* pCurChar);
CFX_BreakType AppendChar_Arabic(CFX_TxtChar* pCurChar);
CFX_BreakType AppendChar_Others(CFX_TxtChar* pCurChar);
private:
void FontChanged();
void SetBreakStatus();
CFX_TxtChar* GetLastChar(int32_t index, bool bOmitChar = true) const;
bool HasTxtLine() const { return m_iReadyLineIndex >= 0; }
FX_CHARTYPE GetUnifiedCharType(FX_CHARTYPE dwType) const;
void ResetArabicContext();
void ResetContextCharStyles();
bool EndBreak_SplitLine(CFX_TxtLine* pNextLine, bool bAllChars);
void EndBreak_BidiLine(std::deque<FX_TPO>* tpos, CFX_BreakType dwStatus);
void EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
bool bAllChars,
CFX_BreakType 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);
int32_t m_iLineWidth;
uint32_t m_dwLayoutStyles;
bool m_bSingleLine;
bool m_bCombText;
bool m_bEquidistant;
int32_t m_iArabicContext;
int32_t m_iCurArabicContext;
CFX_RetainPtr<CFGAS_GEFont> m_pFont;
int32_t m_iFontSize;
int32_t m_iTabWidth;
FX_WCHAR m_wDefChar;
FX_WCHAR m_wParagBreakChar;
int32_t m_iDefChar;
int32_t m_iAlignment;
uint32_t m_dwContextCharStyles;
int32_t m_iCombWidth;
FX_CHARTYPE m_eCharType;
int32_t m_iCurAlignment;
CFX_TxtLine m_TxtLine[2];
CFX_TxtLine* m_pCurLine;
int32_t m_iTolerance;
int32_t m_iHorScale;
int32_t m_iCharSpace;
int8_t m_iReadyLineIndex;
};
#endif // XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_
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