// 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
#include "xfa/fgas/layout/fgas_textbreak.h"
#include <algorithm>
#include "core/fxcrt/fx_arabic.h"
#include "core/fxcrt/fx_arb.h"
#include "core/fxcrt/fx_memory.h"
#include "third_party/base/ptr_util.h"
#include "xfa/fgas/font/cfgas_gefont.h"
#include "xfa/fgas/layout/fgas_linebreak.h"
namespace {
typedef uint32_t (CFX_TxtBreak::*FX_TxtBreak_LPFAppendChar)(
CFX_TxtChar* pCurChar,
int32_t iRotation);
const FX_TxtBreak_LPFAppendChar g_FX_TxtBreak_lpfAppendChar[16] = {
&CFX_TxtBreak::AppendChar_Others, &CFX_TxtBreak::AppendChar_Tab,
&CFX_TxtBreak::AppendChar_Others, &CFX_TxtBreak::AppendChar_Control,
&CFX_TxtBreak::AppendChar_Combination, &CFX_TxtBreak::AppendChar_Others,
&CFX_TxtBreak::AppendChar_Others, &CFX_TxtBreak::AppendChar_Arabic,
&CFX_TxtBreak::AppendChar_Arabic, &CFX_TxtBreak::AppendChar_Arabic,
&CFX_TxtBreak::AppendChar_Arabic, &CFX_TxtBreak::AppendChar_Arabic,
&CFX_TxtBreak::AppendChar_Arabic, &CFX_TxtBreak::AppendChar_Others,
&CFX_TxtBreak::AppendChar_Others, &CFX_TxtBreak::AppendChar_Others,
};
} // namespace
CFX_TxtBreak::CFX_TxtBreak(uint32_t dwPolicies)
: m_dwPolicies(dwPolicies),
m_iLineWidth(2000000),
m_dwLayoutStyles(0),
m_bVertical(false),
m_bArabicContext(false),
m_bArabicShapes(false),
m_bRTL(false),
m_bSingleLine(false),
m_bCombText(false),
m_iArabicContext(1),
m_iCurArabicContext(1),
m_pFont(nullptr),
m_iFontSize(240),
m_bEquidistant(true),
m_iTabWidth(720000),
m_wDefChar(0xFEFF),
m_wParagBreakChar(L'\n'),
m_iDefChar(0),
m_iLineRotation(0),
m_iCharRotation(0),
m_iRotation(0),
m_iAlignment(FX_TXTLINEALIGNMENT_Left),
m_dwContextCharStyles(0),
m_iCombWidth(360000),
m_pUserData(nullptr),
m_eCharType(FX_CHARTYPE_Unknown),
m_bArabicNumber(false),
m_bArabicComma(false),
m_pCurLine(nullptr),
m_iReady(0),
m_iTolerance(0),
m_iHorScale(100),
m_iCharSpace(0) {
m_bPagination = (m_dwPolicies & FX_TXTBREAKPOLICY_Pagination) != 0;
int32_t iSize = m_bPagination ? sizeof(CFX_Char) : sizeof(CFX_TxtChar);
m_pTxtLine1 = pdfium::MakeUnique<CFX_TxtLine>(iSize);
m_pTxtLine2 = pdfium::MakeUnique<CFX_TxtLine>(iSize);
m_pCurLine = m_pTxtLine1.get();
ResetArabicContext();
}
CFX_TxtBreak::~CFX_TxtBreak() {
Reset();
}
void CFX_TxtBreak::SetLineWidth(FX_FLOAT fLineWidth) {
m_iLineWidth = FXSYS_round(fLineWidth * 20000.0f);
ASSERT(m_iLineWidth >= 20000);
}
void CFX_TxtBreak::SetLinePos(FX_FLOAT fLinePos) {
int32_t iLinePos =
std::min(std::max(FXSYS_round(fLinePos * 20000.0f), 0), m_iLineWidth);
m_pCurLine->m_iStart = iLinePos;
m_pCurLine->m_iWidth += iLinePos;
}
void CFX_TxtBreak::SetLayoutStyles(uint32_t dwLayoutStyles) {
m_dwLayoutStyles = dwLayoutStyles;
m_bVertical = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_VerticalChars) != 0;
m_bArabicContext = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ArabicContext) != 0;
m_bArabicShapes = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ArabicShapes) != 0;
m_bRTL = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_RTLReadingOrder) != 0;
m_bSingleLine = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_SingleLine) != 0;
m_bCombText = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_CombText) != 0;
ResetArabicContext();
m_iLineRotation = GetLineRotation(m_dwLayoutStyles);
m_iRotation = m_iLineRotation + m_iCharRotation;
m_iRotation %= 4;
}
void CFX_TxtBreak::SetFont(const CFX_RetainPtr<CFGAS_GEFont>& pFont) {
if (!pFont || pFont == m_pFont)
return;
SetBreakStatus();
m_pFont = pFont;
FontChanged();
}
void CFX_TxtBreak::SetFontSize(FX_FLOAT fFontSize) {
int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
if (m_iFontSize == iFontSize)
return;
SetBreakStatus();
m_iFontSize = iFontSize;
FontChanged();
}
void CFX_TxtBreak::FontChanged() {
m_iDefChar = 0;
if (m_wDefChar == 0xFEFF || !m_pFont)
return;
m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
m_iDefChar *= m_iFontSize;
}
void CFX_TxtBreak::SetTabWidth(FX_FLOAT fTabWidth, bool bEquidistant) {
m_iTabWidth = FXSYS_round(fTabWidth * 20000.0f);
if (m_iTabWidth < FX_TXTBREAK_MinimumTabWidth)
m_iTabWidth = FX_TXTBREAK_MinimumTabWidth;
m_bEquidistant = bEquidistant;
}
void CFX_TxtBreak::SetDefaultChar(FX_WCHAR wch) {
m_wDefChar = wch;
m_iDefChar = 0;
if (m_wDefChar == 0xFEFF || !m_pFont)
return;
m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
if (m_iDefChar < 0)
m_iDefChar = 0;
else
m_iDefChar *= m_iFontSize;
}
void CFX_TxtBreak::SetParagraphBreakChar(FX_WCHAR wch) {
if (wch != L'\r' && wch != L'\n')
return;
m_wParagBreakChar = wch;
}
void CFX_TxtBreak::SetLineBreakTolerance(FX_FLOAT fTolerance) {
m_iTolerance = FXSYS_round(fTolerance * 20000.0f);
}
void CFX_TxtBreak::SetCharRotation(int32_t iCharRotation) {
if (iCharRotation < 0)
iCharRotation += (-iCharRotation / 4 + 1) * 4;
else if (iCharRotation > 3)
iCharRotation -= (iCharRotation / 4) * 4;
if (m_iCharRotation == iCharRotation)
return;
SetBreakStatus();
m_iCharRotation = iCharRotation;
m_iRotation = m_iLineRotation + m_iCharRotation;
m_iRotation %= 4;
}
void CFX_TxtBreak::SetAlignment(int32_t iAlignment) {
ASSERT(iAlignment >= FX_TXTLINEALIGNMENT_Left &&
iAlignment <= FX_TXTLINEALIGNMENT_Distributed);
m_iAlignment = iAlignment;
ResetArabicContext();
}
void CFX_TxtBreak::ResetContextCharStyles() {
m_dwContextCharStyles = m_bArabicContext ? m_iCurAlignment : m_iAlignment;
if (m_bArabicNumber)
m_dwContextCharStyles |= FX_TXTCHARSTYLE_ArabicNumber;
if (m_bArabicComma)
m_dwContextCharStyles |= FX_TXTCHARSTYLE_ArabicComma;
if ((m_bArabicContext && m_bCurRTL) || (!m_bArabicContext && m_bRTL))
m_dwContextCharStyles |= FX_TXTCHARSTYLE_RTLReadingOrder;
m_dwContextCharStyles |= (m_iArabicContext << 8);
}
void CFX_TxtBreak::SetCombWidth(FX_FLOAT fCombWidth) {
m_iCombWidth = FXSYS_round(fCombWidth * 20000.0f);
}
void CFX_TxtBreak::SetUserData(void* pUserData) {
if (m_pUserData == pUserData)
return;
SetBreakStatus();
m_pUserData = pUserData;
}
void CFX_TxtBreak::SetBreakStatus() {
if (m_bPagination)
return;
int32_t iCount = m_pCurLine->CountChars();
if (iCount < 1)
return;
CFX_TxtChar* pTC = m_pCurLine->GetCharPtr(iCount - 1);
if (pTC->m_dwStatus == 0)
pTC->m_dwStatus = FX_TXTBREAK_PieceBreak;
}
void CFX_TxtBreak::SetHorizontalScale(int32_t iScale) {
if (iScale < 0)
iScale = 0;
if (iScale == m_iHorScale)
return;
SetBreakStatus();
m_iHorScale = iScale;
}
void CFX_TxtBreak::SetCharSpace(FX_FLOAT fCharSpace) {
m_iCharSpace = FXSYS_round(fCharSpace * 20000.0f);
}
static const int32_t gs_FX_TxtLineRotations[8] = {0, 3, 1, 0, 2, 1, 3, 2};
int32_t CFX_TxtBreak::GetLineRotation(uint32_t dwStyles) const {
return gs_FX_TxtLineRotations[(dwStyles & 0x0E) >> 1];
}
CFX_TxtChar* CFX_TxtBreak::GetLastChar(int32_t index, bool bOmitChar) const {
std::vector<CFX_TxtChar>& ca = *m_pCurLine->m_pLineChars.get();
int32_t iCount = pdfium::CollectionSize<int32_t>(ca);
if (index < 0 || index >= iCount)
return nullptr;
int32_t iStart = iCount - 1;
while (iStart > -1) {
CFX_TxtChar* pTC = &ca[iStart--];
if (bOmitChar && pTC->GetCharType() == FX_CHARTYPE_Combination)
continue;
if (--index < 0)
return pTC;
}
return nullptr;
}
CFX_TxtLine* CFX_TxtBreak::GetTxtLine() const {
if (m_iReady == 1)
return m_pTxtLine1.get();
if (m_iReady == 2)
return m_pTxtLine2.get();
return nullptr;
}
CFX_TxtPieceArray* CFX_TxtBreak::GetTxtPieces() const {
CFX_TxtLine* pTxtLine = GetTxtLine();
return pTxtLine ? pTxtLine->m_pLinePieces.get() : nullptr;
}
inline FX_CHARTYPE CFX_TxtBreak::GetUnifiedCharType(
FX_CHARTYPE chartype) const {
return chartype >= FX_CHARTYPE_ArabicAlef ? FX_CHARTYPE_Arabic : chartype;
}
void CFX_TxtBreak::ResetArabicContext() {
if (m_bArabicContext) {
m_bCurRTL = m_iCurArabicContext > 1;
m_iCurAlignment = m_iCurArabicContext > 1 ? FX_TXTLINEALIGNMENT_Right
: FX_TXTLINEALIGNMENT_Left;
m_iCurAlignment |= (m_iAlignment & FX_TXTLINEALIGNMENT_HigherMask);
m_bArabicNumber = m_iArabicContext >= 1 && m_bArabicShapes;
} else {
if (m_bPagination) {
m_bCurRTL = false;
m_iCurAlignment = 0;
} else {
m_bCurRTL = m_bRTL;
m_iCurAlignment = m_iAlignment;
}
if (m_bRTL)
m_bArabicNumber = m_iArabicContext >= 1;
else
m_bArabicNumber = m_iArabicContext > 1;
m_bArabicNumber = m_bArabicNumber && m_bArabicShapes;
}
m_bArabicComma = m_bArabicNumber;
ResetContextCharStyles();
}
void CFX_TxtBreak::AppendChar_PageLoad(CFX_TxtChar* pCurChar,
uint32_t dwProps) {
if (!m_bPagination) {
pCurChar->m_dwStatus = 0;
pCurChar->m_pUserData = m_pUserData;
}
if (m_bArabicContext || m_bArabicShapes) {
int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
int32_t iArabicContext =
(iBidiCls == FX_BIDICLASS_R || iBidiCls == FX_BIDICLASS_AL)
? 2
: ((iBidiCls == FX_BIDICLASS_L || iBidiCls == FX_BIDICLASS_S) ? 0
: 1);
if (iArabicContext != m_iArabicContext && iArabicContext != 1) {
m_iArabicContext = iArabicContext;
if (m_iCurArabicContext == 1)
m_iCurArabicContext = iArabicContext;
ResetArabicContext();
if (!m_bPagination) {
CFX_TxtChar* pLastChar = GetLastChar(1, false);
if (pLastChar && pLastChar->m_dwStatus < 1)
pLastChar->m_dwStatus = FX_TXTBREAK_PieceBreak;
}
}
}
pCurChar->m_dwCharStyles = m_dwContextCharStyles;
}
uint32_t CFX_TxtBreak::AppendChar_Combination(CFX_TxtChar* pCurChar,
int32_t iRotation) {
FX_WCHAR wch = pCurChar->m_wCharCode;
FX_WCHAR wForm;
int32_t iCharWidth = 0;
pCurChar->m_iCharWidth = -1;
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (m_bVertical != FX_IsOdd(iRotation)) {
iCharWidth = 1000;
} else {
wForm = wch;
if (!m_bPagination) {
CFX_TxtChar* pLastChar = GetLastChar(0, false);
if (pLastChar &&
(pLastChar->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicShadda) == 0) {
bool bShadda = false;
if (wch == 0x0651) {
FX_WCHAR wLast = pLastChar->m_wCharCode;
if (wLast >= 0x064C && wLast <= 0x0650) {
wForm = FX_GetArabicFromShaddaTable(wLast);
bShadda = true;
}
} else if (wch >= 0x064C && wch <= 0x0650) {
if (pLastChar->m_wCharCode == 0x0651) {
wForm = FX_GetArabicFromShaddaTable(wch);
bShadda = true;
}
}
if (bShadda) {
pLastChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
pLastChar->m_iCharWidth = 0;
pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
}
}
}
if (!m_pFont->GetCharWidth(wForm, iCharWidth, false))
iCharWidth = 0;
}
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorScale / 100;
}
pCurChar->m_iCharWidth = -iCharWidth;
return FX_TXTBREAK_None;
}
uint32_t CFX_TxtBreak::AppendChar_Tab(CFX_TxtChar* pCurChar,
int32_t iRotation) {
m_eCharType = FX_CHARTYPE_Tab;
if ((m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ExpandTab) == 0)
return FX_TXTBREAK_None;
int32_t& iLineWidth = m_pCurLine->m_iWidth;
int32_t iCharWidth;
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (m_bEquidistant) {
iCharWidth = iLineWidth;
iCharWidth = m_iTabWidth * (iCharWidth / m_iTabWidth + 1) - iCharWidth;
if (iCharWidth < FX_TXTBREAK_MinimumTabWidth)
iCharWidth += m_iTabWidth;
} else {
iCharWidth = m_iTabWidth;
}
}
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
if (!m_bSingleLine && iLineWidth >= m_iLineWidth + m_iTolerance)
return EndBreak(FX_TXTBREAK_LineBreak);
return FX_TXTBREAK_None;
}
uint32_t CFX_TxtBreak::AppendChar_Control(CFX_TxtChar* pCurChar,
int32_t iRotation) {
m_eCharType = FX_CHARTYPE_Control;
uint32_t dwRet = FX_TXTBREAK_None;
if (!m_bSingleLine) {
FX_WCHAR wch = pCurChar->m_wCharCode;
switch (wch) {
case L'\v':
case 0x2028:
dwRet = FX_TXTBREAK_LineBreak;
break;
case L'\f':
dwRet = FX_TXTBREAK_PageBreak;
break;
case 0x2029:
dwRet = FX_TXTBREAK_ParagraphBreak;
break;
default:
if (wch == m_wParagBreakChar)
dwRet = FX_TXTBREAK_ParagraphBreak;
break;
}
if (dwRet != FX_TXTBREAK_None)
dwRet = EndBreak(dwRet);
}
return dwRet;
}
uint32_t CFX_TxtBreak::AppendChar_Arabic(CFX_TxtChar* pCurChar,
int32_t iRotation) {
FX_CHARTYPE chartype = pCurChar->GetCharType();
int32_t& iLineWidth = m_pCurLine->m_iWidth;
FX_WCHAR wForm;
int32_t iCharWidth = 0;
CFX_TxtChar* pLastChar = nullptr;
bool bAlef = false;
if (!m_bCombText && m_eCharType >= FX_CHARTYPE_ArabicAlef &&
m_eCharType <= FX_CHARTYPE_ArabicDistortion) {
pLastChar = GetLastChar(1);
if (pLastChar) {
iCharWidth = pLastChar->m_iCharWidth;
if (iCharWidth > 0)
iLineWidth -= iCharWidth;
CFX_Char* pPrevChar = GetLastChar(2);
wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar);
bAlef = (wForm == 0xFEFF &&
pLastChar->GetCharType() == FX_CHARTYPE_ArabicAlef);
int32_t iLastRotation = pLastChar->m_nRotation + m_iLineRotation;
if (m_bVertical && (pLastChar->m_dwCharProps & 0x8000) != 0)
iLastRotation++;
if (m_bVertical != FX_IsOdd(iLastRotation))
iCharWidth = 1000;
else
m_pFont->GetCharWidth(wForm, iCharWidth, false);
if (wForm == 0xFEFF)
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorScale / 100;
pLastChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
iCharWidth = 0;
}
}
m_eCharType = chartype;
wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar,
nullptr);
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (m_bVertical != FX_IsOdd(iRotation))
iCharWidth = 1000;
else
m_pFont->GetCharWidth(wForm, iCharWidth, false);
if (wForm == 0xFEFF)
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorScale / 100;
}
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
m_pCurLine->m_iArabicChars++;
if (!m_bSingleLine && iLineWidth > m_iLineWidth + m_iTolerance)
return EndBreak(FX_TXTBREAK_LineBreak);
return FX_TXTBREAK_None;
}
uint32_t CFX_TxtBreak::AppendChar_Others(CFX_TxtChar* pCurChar,
int32_t iRotation) {
uint32_t dwProps = pCurChar->m_dwCharProps;
FX_CHARTYPE chartype = pCurChar->GetCharType();
int32_t& iLineWidth = m_pCurLine->m_iWidth;
int32_t iCharWidth = 0;
m_eCharType = chartype;
FX_WCHAR wch = pCurChar->m_wCharCode;
FX_WCHAR wForm = wch;
if (chartype == FX_CHARTYPE_Numeric) {
if (m_bArabicNumber) {
wForm = wch + 0x0630;
pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicIndic;
}
} else if (wch == L',') {
if (m_bArabicShapes && m_iCurArabicContext > 0) {
wForm = 0x060C;
pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicComma;
}
} else if (m_bCurRTL || m_bVertical) {
wForm = FX_GetMirrorChar(wch, dwProps, m_bCurRTL, m_bVertical);
}
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (m_bVertical != FX_IsOdd(iRotation))
iCharWidth = 1000;
else if (!m_pFont->GetCharWidth(wForm, iCharWidth, false))
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorScale / 100;
}
iCharWidth += m_iCharSpace;
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
bool bBreak = (chartype != FX_CHARTYPE_Space ||
(m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0);
if (!m_bSingleLine && bBreak && iLineWidth > m_iLineWidth + m_iTolerance)
return EndBreak(FX_TXTBREAK_LineBreak);
return FX_TXTBREAK_None;
}
uint32_t CFX_TxtBreak::AppendChar(FX_WCHAR wch) {
uint32_t dwProps = kTextLayoutCodeProperties[static_cast<uint16_t>(wch)];
FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps);
m_pCurLine->m_pLineChars->emplace_back();
CFX_TxtChar* pCurChar = &m_pCurLine->m_pLineChars->back();
pCurChar->m_wCharCode = static_cast<uint16_t>(wch);
pCurChar->m_nRotation = m_iCharRotation;
pCurChar->m_dwCharProps = dwProps;
pCurChar->m_dwCharStyles = 0;
pCurChar->m_iCharWidth = 0;
pCurChar->m_iHorizontalScale = m_iHorScale;
pCurChar->m_iVerticalScale = 100;
pCurChar->m_dwStatus = 0;
pCurChar->m_iBidiClass = 0;
pCurChar->m_iBidiLevel = 0;
pCurChar->m_iBidiPos = 0;
pCurChar->m_iBidiOrder = 0;
pCurChar->m_pUserData = nullptr;
AppendChar_PageLoad(pCurChar, dwProps);
uint32_t dwRet1 = FX_TXTBREAK_None;
if (chartype != FX_CHARTYPE_Combination &&
GetUnifiedCharType(m_eCharType) != GetUnifiedCharType(chartype) &&
m_eCharType != FX_CHARTYPE_Unknown &&
m_pCurLine->m_iWidth > m_iLineWidth + m_iTolerance && !m_bSingleLine &&
(m_eCharType != FX_CHARTYPE_Space || chartype != FX_CHARTYPE_Control)) {
dwRet1 = EndBreak(FX_TXTBREAK_LineBreak);
int32_t iCount = m_pCurLine->CountChars();
if (iCount > 0)
pCurChar = &(*m_pCurLine->m_pLineChars)[iCount - 1];
}
int32_t iRotation = m_iRotation;
if (m_bVertical && (dwProps & 0x8000) != 0)
iRotation = (iRotation + 1) % 4;
uint32_t dwRet2 =
(this->*g_FX_TxtBreak_lpfAppendChar[chartype >> FX_CHARTYPEBITS])(
pCurChar, iRotation);
return std::max(dwRet1, dwRet2);
}
void CFX_TxtBreak::EndBreak_UpdateArabicShapes() {
ASSERT(m_bArabicShapes);
int32_t iCount = m_pCurLine->CountChars();
if (iCount < 2)
return;
int32_t& iLineWidth = m_pCurLine->m_iWidth;
CFX_TxtChar* pCur = m_pCurLine->GetCharPtr(0);
bool bPrevNum = (pCur->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
pCur = m_pCurLine->GetCharPtr(1);
FX_WCHAR wch, wForm;
bool bNextNum;
int32_t i = 1;
int32_t iCharWidth;
int32_t iRotation;
CFX_TxtChar* pNext;
do {
i++;
if (i < iCount) {
pNext = m_pCurLine->GetCharPtr(i);
bNextNum = (pNext->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
} else {
pNext = nullptr;
bNextNum = false;
}
wch = pCur->m_wCharCode;
if (wch == L'.') {
if (bPrevNum && bNextNum) {
iRotation = m_iRotation;
if (m_bVertical && (pCur->m_dwCharProps & 0x8000) != 0)
iRotation = ((iRotation + 1) & 0x03);
wForm = wch == L'.' ? 0x066B : 0x066C;
iLineWidth -= pCur->m_iCharWidth;
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (m_bVertical != FX_IsOdd(iRotation))
iCharWidth = 1000;
else if (!m_pFont->GetCharWidth(wForm, iCharWidth, false))
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorScale / 100;
}
pCur->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
}
}
bPrevNum = (pCur->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
pCur = pNext;
} while (i < iCount);
}
bool CFX_TxtBreak::EndBreak_SplitLine(CFX_TxtLine* pNextLine,
bool bAllChars,
uint32_t dwStatus) {
int32_t iCount = m_pCurLine->CountChars();
bool bDone = false;
CFX_TxtChar* pTC;
if (!m_bSingleLine && m_pCurLine->m_iWidth > m_iLineWidth + m_iTolerance) {
pTC = m_pCurLine->GetCharPtr(iCount - 1);
switch (pTC->GetCharType()) {
case FX_CHARTYPE_Tab:
case FX_CHARTYPE_Control:
break;
case FX_CHARTYPE_Space:
if ((m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0) {
SplitTextLine(m_pCurLine, pNextLine, !m_bPagination && bAllChars);
bDone = true;
}
break;
default:
SplitTextLine(m_pCurLine, pNextLine, !m_bPagination && bAllChars);
bDone = true;
break;
}
}
iCount = m_pCurLine->CountChars();
CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
CFX_TxtPiece tp;
if (m_bPagination) {
tp.m_dwStatus = dwStatus;
tp.m_iStartPos = m_pCurLine->m_iStart;
tp.m_iWidth = m_pCurLine->m_iWidth;
tp.m_iStartChar = 0;
tp.m_iChars = iCount;
tp.m_pChars = m_pCurLine->m_pLineChars.get();
tp.m_pUserData = m_pUserData;
pTC = m_pCurLine->GetCharPtr(0);
tp.m_dwCharStyles = pTC->m_dwCharStyles;
tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
tp.m_iVerticalScale = pTC->m_iVerticalScale;
pCurPieces->Add(tp);
m_pCurLine = pNextLine;
m_eCharType = FX_CHARTYPE_Unknown;
return true;
}
if (bAllChars && !bDone) {
int32_t iEndPos = m_pCurLine->m_iWidth;
GetBreakPos(*m_pCurLine->m_pLineChars.get(), iEndPos, bAllChars, true);
}
return false;
}
void CFX_TxtBreak::EndBreak_BidiLine(std::deque<FX_TPO>* tpos,
uint32_t dwStatus) {
CFX_TxtPiece tp;
FX_TPO tpo;
CFX_TxtChar* pTC;
int32_t i;
int32_t j;
std::vector<CFX_TxtChar>& chars = *m_pCurLine->m_pLineChars.get();
int32_t iCount = m_pCurLine->CountChars();
bool bDone = (m_pCurLine->m_iArabicChars > 0 || m_bCurRTL);
if (!m_bPagination && bDone) {
int32_t iBidiNum = 0;
for (i = 0; i < iCount; i++) {
pTC = &chars[i];
pTC->m_iBidiPos = i;
if (pTC->GetCharType() != FX_CHARTYPE_Control)
iBidiNum = i;
if (i == 0)
pTC->m_iBidiLevel = 1;
}
FX_BidiLine(chars, iBidiNum + 1, m_bCurRTL ? 1 : 0);
}
CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
if (!m_bPagination &&
(bDone || (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_MutipleFormat) != 0)) {
tp.m_dwStatus = FX_TXTBREAK_PieceBreak;
tp.m_iStartPos = m_pCurLine->m_iStart;
tp.m_pChars = m_pCurLine->m_pLineChars.get();
int32_t iBidiLevel = -1;
int32_t iCharWidth;
i = 0;
j = -1;
while (i < iCount) {
pTC = &chars[i];
if (iBidiLevel < 0) {
iBidiLevel = pTC->m_iBidiLevel;
tp.m_iWidth = 0;
tp.m_iBidiLevel = iBidiLevel;
tp.m_iBidiPos = pTC->m_iBidiOrder;
tp.m_dwCharStyles = pTC->m_dwCharStyles;
tp.m_pUserData = pTC->m_pUserData;
tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
tp.m_iVerticalScale = pTC->m_iVerticalScale;
tp.m_dwStatus = FX_TXTBREAK_PieceBreak;
}
if (iBidiLevel != pTC->m_iBidiLevel || pTC->m_dwStatus != 0) {
if (iBidiLevel == pTC->m_iBidiLevel) {
tp.m_dwStatus = pTC->m_dwStatus;
iCharWidth = pTC->m_iCharWidth;
if (iCharWidth > 0)
tp.m_iWidth += iCharWidth;
i++;
}
tp.m_iChars = i - tp.m_iStartChar;
pCurPieces->Add(tp);
tp.m_iStartPos += tp.m_iWidth;
tp.m_iStartChar = i;
tpo.index = ++j;
tpo.pos = tp.m_iBidiPos;
tpos->push_back(tpo);
iBidiLevel = -1;
} else {
iCharWidth = pTC->m_iCharWidth;
if (iCharWidth > 0)
tp.m_iWidth += iCharWidth;
i++;
}
}
if (i > tp.m_iStartChar) {
tp.m_dwStatus = dwStatus;
tp.m_iChars = i - tp.m_iStartChar;
pCurPieces->Add(tp);
tpo.index = ++j;
tpo.pos = tp.m_iBidiPos;
tpos->push_back(tpo);
}
if (j > -1) {
if (j > 0) {
std::sort(tpos->begin(), tpos->end());
int32_t iStartPos = 0;
for (i = 0; i <= j; i++) {
tpo = (*tpos)[i];
CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
ttp.m_iStartPos = iStartPos;
iStartPos += ttp.m_iWidth;
}
}
CFX_TxtPiece& ttp = pCurPieces->GetAt(j);
ttp.m_dwStatus = dwStatus;
}
} else {
tp.m_dwStatus = dwStatus;
tp.m_iStartPos = m_pCurLine->m_iStart;
tp.m_iWidth = m_pCurLine->m_iWidth;
tp.m_iStartChar = 0;
tp.m_iChars = iCount;
tp.m_pChars = m_pCurLine->m_pLineChars.get();
tp.m_pUserData = m_pUserData;
pTC = &chars[0];
tp.m_dwCharStyles = pTC->m_dwCharStyles;
tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
tp.m_iVerticalScale = pTC->m_iVerticalScale;
pCurPieces->Add(tp);
tpos->push_back({0, 0});
}
}
void CFX_TxtBreak::EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
bool bAllChars,
uint32_t dwStatus) {
int32_t iNetWidth = m_pCurLine->m_iWidth;
int32_t iGapChars = 0;
int32_t iCharWidth;
CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
int32_t i;
int32_t j;
int32_t iCount = pCurPieces->GetSize();
bool bFind = false;
FX_TPO tpo;
CFX_TxtChar* pTC;
FX_CHARTYPE chartype;
for (i = iCount - 1; i > -1; i--) {
tpo = tpos[i];
CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
if (!bFind)
iNetWidth = ttp.GetEndPos();
bool bArabic = FX_IsOdd(ttp.m_iBidiLevel);
j = bArabic ? 0 : ttp.m_iChars - 1;
while (j > -1 && j < ttp.m_iChars) {
pTC = ttp.GetCharPtr(j);
if (pTC->m_nBreakType == FX_LBT_DIRECT_BRK)
iGapChars++;
if (!bFind || !bAllChars) {
chartype = pTC->GetCharType();
if (chartype == FX_CHARTYPE_Space || chartype == FX_CHARTYPE_Control) {
if (!bFind) {
iCharWidth = pTC->m_iCharWidth;
if (bAllChars && iCharWidth > 0)
iNetWidth -= iCharWidth;
}
} else {
bFind = true;
if (!bAllChars)
break;
}
}
j += bArabic ? 1 : -1;
}
if (!bAllChars && bFind)
break;
}
int32_t iOffset = m_iLineWidth - iNetWidth;
int32_t iLowerAlignment = (m_iCurAlignment & FX_TXTLINEALIGNMENT_LowerMask);
int32_t iHigherAlignment = (m_iCurAlignment & FX_TXTLINEALIGNMENT_HigherMask);
if (iGapChars > 0 && (iHigherAlignment == FX_TXTLINEALIGNMENT_Distributed ||
(iHigherAlignment == FX_TXTLINEALIGNMENT_Justified &&
dwStatus != FX_TXTBREAK_ParagraphBreak))) {
int32_t iStart = -1;
for (i = 0; i < iCount; i++) {
tpo = tpos[i];
CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
if (iStart < -1)
iStart = ttp.m_iStartPos;
else
ttp.m_iStartPos = iStart;
for (j = 0; j < ttp.m_iChars; j++) {
pTC = ttp.GetCharPtr(j);
if (pTC->m_nBreakType != FX_LBT_DIRECT_BRK || pTC->m_iCharWidth < 0)
continue;
int32_t k = iOffset / iGapChars;
pTC->m_iCharWidth += k;
ttp.m_iWidth += k;
iOffset -= k;
iGapChars--;
if (iGapChars < 1)
break;
}
iStart += ttp.m_iWidth;
}
} else if (iLowerAlignment > FX_TXTLINEALIGNMENT_Left) {
if (iLowerAlignment == FX_TXTLINEALIGNMENT_Center)
iOffset /= 2;
if (iOffset > 0) {
for (i = 0; i < iCount; i++) {
CFX_TxtPiece& ttp = pCurPieces->GetAt(i);
ttp.m_iStartPos += iOffset;
}
}
}
}
uint32_t CFX_TxtBreak::EndBreak(uint32_t dwStatus) {
ASSERT(dwStatus >= FX_TXTBREAK_PieceBreak &&
dwStatus <= FX_TXTBREAK_PageBreak);
CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
int32_t iCount = pCurPieces->GetSize();
if (iCount > 0) {
CFX_TxtPiece* pLastPiece = pCurPieces->GetPtrAt(--iCount);
if (dwStatus > FX_TXTBREAK_PieceBreak)
pLastPiece->m_dwStatus = dwStatus;
else
dwStatus = pLastPiece->m_dwStatus;
return dwStatus;
} else {
CFX_TxtLine* pLastLine = GetTxtLine();
if (pLastLine) {
pCurPieces = pLastLine->m_pLinePieces.get();
iCount = pCurPieces->GetSize();
if (iCount-- > 0) {
CFX_TxtPiece* pLastPiece = pCurPieces->GetPtrAt(iCount);
if (dwStatus > FX_TXTBREAK_PieceBreak)
pLastPiece->m_dwStatus = dwStatus;
else
dwStatus = pLastPiece->m_dwStatus;
return dwStatus;
}
return FX_TXTBREAK_None;
}
iCount = m_pCurLine->CountChars();
if (iCount < 1)
return FX_TXTBREAK_None;
if (!m_bPagination) {
CFX_TxtChar* pTC = m_pCurLine->GetCharPtr(iCount - 1);
pTC->m_dwStatus = dwStatus;
}
if (dwStatus <= FX_TXTBREAK_PieceBreak)
return dwStatus;
}
m_iReady = (m_pCurLine == m_pTxtLine1.get()) ? 1 : 2;
CFX_TxtLine* pNextLine =
(m_pCurLine == m_pTxtLine1.get()) ? m_pTxtLine2.get() : m_pTxtLine1.get();
bool bAllChars = (m_iCurAlignment > FX_TXTLINEALIGNMENT_Right);
if (m_bArabicShapes)
EndBreak_UpdateArabicShapes();
if (!EndBreak_SplitLine(pNextLine, bAllChars, dwStatus)) {
std::deque<FX_TPO> tpos;
EndBreak_BidiLine(&tpos, dwStatus);
if (!m_bPagination && m_iCurAlignment > FX_TXTLINEALIGNMENT_Left)
EndBreak_Alignment(tpos, bAllChars, dwStatus);
}
m_pCurLine = pNextLine;
CFX_Char* pTC = GetLastChar(0, false);
m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE_Unknown;
if (dwStatus == FX_TXTBREAK_ParagraphBreak) {
m_iArabicContext = m_iCurArabicContext = 1;
ResetArabicContext();
}
return dwStatus;
}
int32_t CFX_TxtBreak::GetBreakPos(std::vector<CFX_TxtChar>& ca,
int32_t& iEndPos,
bool bAllChars,
bool bOnlyBrk) {
int32_t iLength = pdfium::CollectionSize<int32_t>(ca) - 1;
if (iLength < 1)
return iLength;
int32_t iBreak = -1;
int32_t iBreakPos = -1;
int32_t iIndirect = -1;
int32_t iIndirectPos = -1;
int32_t iLast = -1;
int32_t iLastPos = -1;
if (m_bSingleLine || iEndPos <= m_iLineWidth) {
if (!bAllChars)
return iLength;
iBreak = iLength;
iBreakPos = iEndPos;
}
bool bSpaceBreak = (m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0;
bool bNumberBreak = (m_dwPolicies & FX_TXTBREAKPOLICY_NumberBreak) != 0;
FX_LINEBREAKTYPE eType;
uint32_t nCodeProp;
uint32_t nCur;
uint32_t nNext;
CFX_Char* pCur = &ca[iLength--];
if (bAllChars)
pCur->m_nBreakType = FX_LBT_UNKNOWN;
nCodeProp = pCur->m_dwCharProps;
nNext = nCodeProp & 0x003F;
int32_t iCharWidth = pCur->m_iCharWidth;
if (iCharWidth > 0)
iEndPos -= iCharWidth;
while (iLength >= 0) {
pCur = &ca[iLength];
nCodeProp = pCur->m_dwCharProps;
nCur = nCodeProp & 0x003F;
if (nCur == FX_CBP_SP) {
if (nNext == FX_CBP_SP)
eType = bSpaceBreak ? FX_LBT_DIRECT_BRK : FX_LBT_PROHIBITED_BRK;
else
eType = gs_FX_LineBreak_PairTable[nCur][nNext];
} else if (bNumberBreak && nCur == FX_CBP_NU && nNext == FX_CBP_NU) {
eType = FX_LBT_DIRECT_BRK;
} else {
if (nNext == FX_CBP_SP)
eType = FX_LBT_PROHIBITED_BRK;
else
eType = gs_FX_LineBreak_PairTable[nCur][nNext];
}
if (bAllChars)
pCur->m_nBreakType = static_cast<uint8_t>(eType);
if (!bOnlyBrk) {
if (m_bSingleLine || iEndPos <= m_iLineWidth ||
(nCur == FX_CBP_SP && !bSpaceBreak)) {
if (eType == FX_LBT_DIRECT_BRK && iBreak < 0) {
iBreak = iLength;
iBreakPos = iEndPos;
if (!bAllChars)
return iLength;
} else if (eType == FX_LBT_INDIRECT_BRK && iIndirect < 0) {
iIndirect = iLength;
iIndirectPos = iEndPos;
}
if (iLast < 0) {
iLast = iLength;
iLastPos = iEndPos;
}
}
iCharWidth = pCur->m_iCharWidth;
if (iCharWidth > 0)
iEndPos -= iCharWidth;
}
nNext = nCodeProp & 0x003F;
iLength--;
}
if (bOnlyBrk)
return 0;
if (iBreak > -1) {
iEndPos = iBreakPos;
return iBreak;
}
if (iIndirect > -1) {
iEndPos = iIndirectPos;
return iIndirect;
}
if (iLast > -1) {
iEndPos = iLastPos;
return iLast;
}
return 0;
}
void CFX_TxtBreak::SplitTextLine(CFX_TxtLine* pCurLine,
CFX_TxtLine* pNextLine,
bool bAllChars) {
ASSERT(pCurLine && pNextLine);
int32_t iCount = pCurLine->CountChars();
if (iCount < 2)
return;
int32_t iEndPos = pCurLine->m_iWidth;
std::vector<CFX_TxtChar>& curChars = *pCurLine->m_pLineChars;
int32_t iCharPos = GetBreakPos(curChars, iEndPos, bAllChars, false);
if (iCharPos < 0)
iCharPos = 0;
iCharPos++;
if (iCharPos >= iCount) {
pNextLine->RemoveAll(true);
CFX_Char* pTC = &curChars[iCharPos - 1];
pTC->m_nBreakType = FX_LBT_UNKNOWN;
return;
}
// m_pLineChars is a unique_ptr<vector>. Assign the ref into nextChars
// so we can change the m_pLineChars vector ...
std::vector<CFX_TxtChar>& nextChars = *pNextLine->m_pLineChars;
nextChars =
std::vector<CFX_TxtChar>(curChars.begin() + iCharPos, curChars.end());
curChars.erase(curChars.begin() + iCharPos, curChars.end());
pCurLine->m_iWidth = iEndPos;
CFX_TxtChar* pTC = &curChars[iCharPos - 1];
pTC->m_nBreakType = FX_LBT_UNKNOWN;
iCount = pdfium::CollectionSize<int>(nextChars);
int32_t iWidth = 0;
for (int32_t i = 0; i < iCount; i++) {
if (nextChars[i].GetCharType() >= FX_CHARTYPE_ArabicAlef) {
pCurLine->m_iArabicChars--;
pNextLine->m_iArabicChars++;
}
int32_t iCharWidth = nextChars[i].m_iCharWidth;
if (iCharWidth > 0)
iWidth += iCharWidth;
if (m_bPagination)
continue;
nextChars[i].m_dwStatus = 0;
}
pNextLine->m_iWidth = iWidth;
}
int32_t CFX_TxtBreak::CountBreakPieces() const {
CFX_TxtPieceArray* pTxtPieces = GetTxtPieces();
return pTxtPieces ? pTxtPieces->GetSize() : 0;
}
const CFX_TxtPiece* CFX_TxtBreak::GetBreakPiece(int32_t index) const {
CFX_TxtPieceArray* pTxtPieces = GetTxtPieces();
if (!pTxtPieces)
return nullptr;
if (index < 0 || index >= pTxtPieces->GetSize())
return nullptr;
return pTxtPieces->GetPtrAt(index);
}
void CFX_TxtBreak::ClearBreakPieces() {
CFX_TxtLine* pTxtLine = GetTxtLine();
if (pTxtLine)
pTxtLine->RemoveAll(true);
m_iReady = 0;
}
void CFX_TxtBreak::Reset() {
m_eCharType = FX_CHARTYPE_Unknown;
m_iArabicContext = 1;
m_iCurArabicContext = 1;
ResetArabicContext();
m_pTxtLine1->RemoveAll(true);
m_pTxtLine2->RemoveAll(true);
}
struct FX_FORMCHAR {
uint16_t wch;
uint16_t wForm;
int32_t iWidth;
};
int32_t CFX_TxtBreak::GetDisplayPos(const FX_TXTRUN* pTxtRun,
FXTEXT_CHARPOS* pCharPos,
bool bCharCode,
CFX_WideString* pWSForms) const {
if (!pTxtRun || pTxtRun->iLength < 1)
return 0;
IFX_TxtAccess* pAccess = pTxtRun->pAccess;
const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity;
const FX_WCHAR* pStr = pTxtRun->wsStr.c_str();
int32_t* pWidths = pTxtRun->pWidths;
int32_t iLength = pTxtRun->iLength - 1;
CFX_RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
uint32_t dwStyles = pTxtRun->dwStyles;
CFX_RectF rtText(*pTxtRun->pRect);
bool bRTLPiece = (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0;
bool bArabicNumber =
(pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_ArabicNumber) != 0;
bool bArabicComma =
(pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_ArabicComma) != 0;
FX_FLOAT fFontSize = pTxtRun->fFontSize;
int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
int32_t iAscent = pFont->GetAscent();
int32_t iDescent = pFont->GetDescent();
int32_t iMaxHeight = iAscent - iDescent;
FX_FLOAT fFontHeight = fFontSize;
FX_FLOAT fAscent = fFontHeight * (FX_FLOAT)iAscent / (FX_FLOAT)iMaxHeight;
FX_FLOAT fDescent = fFontHeight * (FX_FLOAT)iDescent / (FX_FLOAT)iMaxHeight;
bool bVerticalDoc = (dwStyles & FX_TXTLAYOUTSTYLE_VerticalLayout) != 0;
bool bVerticalChar = (dwStyles & FX_TXTLAYOUTSTYLE_VerticalChars) != 0;
int32_t iRotation = GetLineRotation(dwStyles) + pTxtRun->iCharRotation;
FX_FLOAT fX = rtText.left;
FX_FLOAT fY;
FX_FLOAT fCharWidth;
FX_FLOAT fCharHeight;
int32_t iHorScale = pTxtRun->iHorizontalScale;
int32_t iVerScale = pTxtRun->iVerticalScale;
bool bSkipSpace = pTxtRun->bSkipSpace;
FX_FORMCHAR formChars[3];
FX_FLOAT fYBase;
if (bVerticalDoc) {
fX += (rtText.width - fFontSize) / 2.0f;
fYBase = bRTLPiece ? rtText.bottom() : rtText.top;
fY = fYBase;
} else {
if (bRTLPiece)
fX = rtText.right();
fYBase = rtText.top + (rtText.height - fFontSize) / 2.0f;
fY = fYBase + fAscent;
}
int32_t iCount = 0;
int32_t iNext = 0;
FX_WCHAR wPrev = 0xFEFF;
FX_WCHAR wNext = 0xFEFF;
FX_WCHAR wForm = 0xFEFF;
FX_WCHAR wLast = 0xFEFF;
bool bShadda = false;
bool bLam = false;
for (int32_t i = 0; i <= iLength; i++) {
int32_t iWidth;
FX_WCHAR wch;
if (pAccess) {
wch = pAccess->GetChar(pIdentity, i);
iWidth = pAccess->GetWidth(pIdentity, i);
} else {
wch = *pStr++;
iWidth = *pWidths++;
}
uint32_t dwProps = FX_GetUnicodeProperties(wch);
FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps);
if (chartype == FX_CHARTYPE_ArabicAlef && iWidth == 0) {
wPrev = 0xFEFF;
wLast = wch;
continue;
}
if (chartype >= FX_CHARTYPE_ArabicAlef) {
if (i < iLength) {
if (pAccess) {
iNext = i + 1;
while (iNext <= iLength) {
wNext = pAccess->GetChar(pIdentity, iNext);
dwProps = FX_GetUnicodeProperties(wNext);
if ((dwProps & FX_CHARTYPEBITSMASK) != FX_CHARTYPE_Combination)
break;
iNext++;
}
if (iNext > iLength)
wNext = 0xFEFF;
} else {
int32_t j = -1;
do {
j++;
if (i + j >= iLength)
break;
wNext = pStr[j];
dwProps = FX_GetUnicodeProperties(wNext);
} while ((dwProps & FX_CHARTYPEBITSMASK) == FX_CHARTYPE_Combination);
if (i + j >= iLength)
wNext = 0xFEFF;
}
} else {
wNext = 0xFEFF;
}
wForm = pdfium::arabic::GetFormChar(wch, wPrev, wNext);
bLam = (wPrev == 0x0644 && wch == 0x0644 && wNext == 0x0647);
} else if (chartype == FX_CHARTYPE_Combination) {
wForm = wch;
if (wch >= 0x064C && wch <= 0x0651) {
if (bShadda) {
wForm = 0xFEFF;
bShadda = false;
} else {
wNext = 0xFEFF;
if (pAccess) {
iNext = i + 1;
if (iNext <= iLength)
wNext = pAccess->GetChar(pIdentity, iNext);
} else {
if (i < iLength)
wNext = *pStr;
}
if (wch == 0x0651) {
if (wNext >= 0x064C && wNext <= 0x0650) {
wForm = FX_GetArabicFromShaddaTable(wNext);
bShadda = true;
}
} else {
if (wNext == 0x0651) {
wForm = FX_GetArabicFromShaddaTable(wch);
bShadda = true;
}
}
}
} else {
bShadda = false;
}
} else if (chartype == FX_CHARTYPE_Numeric) {
wForm = wch;
if (bArabicNumber)
wForm += 0x0630;
} else if (wch == L'.') {
wForm = wch;
if (bArabicNumber) {
wNext = 0xFEFF;
if (pAccess) {
iNext = i + 1;
if (iNext <= iLength)
wNext = pAccess->GetChar(pIdentity, iNext);
} else {
if (i < iLength)
wNext = *pStr;
}
if (wNext >= L'0' && wNext <= L'9')
wForm = 0x066B;
}
} else if (wch == L',') {
wForm = wch;
if (bArabicComma)
wForm = 0x060C;
} else if (bRTLPiece || bVerticalChar) {
wForm = FX_GetMirrorChar(wch, dwProps, bRTLPiece, bVerticalChar);
} else {
wForm = wch;
}
if (chartype != FX_CHARTYPE_Combination)
bShadda = false;
if (chartype < FX_CHARTYPE_ArabicAlef)
bLam = false;
dwProps = FX_GetUnicodeProperties(wForm);
int32_t iCharRotation = iRotation;
if (bVerticalChar && (dwProps & 0x8000) != 0)
iCharRotation++;
iCharRotation %= 4;
bool bEmptyChar =
(chartype >= FX_CHARTYPE_Tab && chartype <= FX_CHARTYPE_Control);
if (wForm == 0xFEFF)
bEmptyChar = true;
int32_t iForms = bLam ? 3 : 1;
iCount += (bEmptyChar && bSkipSpace) ? 0 : iForms;
if (!pCharPos) {
if (iWidth > 0)
wPrev = wch;
wLast = wch;
continue;
}
int32_t iCharWidth = iWidth;
if (iCharWidth < 0)
iCharWidth = -iCharWidth;
iCharWidth /= iFontSize;
formChars[0].wch = wch;
formChars[0].wForm = wForm;
formChars[0].iWidth = iCharWidth;
if (bLam) {
formChars[1].wForm = 0x0651;
iCharWidth = 0;
pFont->GetCharWidth(0x0651, iCharWidth, false);
formChars[1].iWidth = iCharWidth;
formChars[2].wForm = 0x0670;
iCharWidth = 0;
pFont->GetCharWidth(0x0670, iCharWidth, false);
formChars[2].iWidth = iCharWidth;
}
for (int32_t j = 0; j < iForms; j++) {
wForm = (FX_WCHAR)formChars[j].wForm;
iCharWidth = formChars[j].iWidth;
if (j > 0) {
chartype = FX_CHARTYPE_Combination;
wch = wForm;
wLast = (FX_WCHAR)formChars[j - 1].wForm;
}
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_GlyphIndex =
bCharCode ? wch : pFont->GetGlyphIndex(wForm, false);
#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
pCharPos->m_ExtGID = pCharPos->m_GlyphIndex;
#endif
pCharPos->m_FontCharWidth = iCharWidth;
if (pWSForms)
*pWSForms += wForm;
}
int32_t iCharHeight;
if (bVerticalDoc) {
iCharHeight = iCharWidth;
iCharWidth = 1000;
} else {
iCharHeight = 1000;
}
fCharWidth = fFontSize * iCharWidth / 1000.0f;
fCharHeight = fFontSize * iCharHeight / 1000.0f;
if (bRTLPiece && chartype != FX_CHARTYPE_Combination) {
if (bVerticalDoc)
fY -= fCharHeight;
else
fX -= fCharWidth;
}
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_Origin = CFX_PointF(fX, fY);
if ((dwStyles & FX_TXTLAYOUTSTYLE_CombText) != 0) {
int32_t iFormWidth = iCharWidth;
pFont->GetCharWidth(wForm, iFormWidth, false);
FX_FLOAT fOffset = fFontSize * (iCharWidth - iFormWidth) / 2000.0f;
if (bVerticalDoc)
pCharPos->m_Origin.y += fOffset;
else
pCharPos->m_Origin.x += fOffset;
}
if (chartype == FX_CHARTYPE_Combination) {
CFX_Rect rtBBox;
if (pFont->GetCharBBox(wForm, &rtBBox, false)) {
pCharPos->m_Origin.y =
fYBase + fFontSize -
fFontSize * (FX_FLOAT)rtBBox.height / (FX_FLOAT)iMaxHeight;
}
if (wForm == wch && wLast != 0xFEFF) {
uint32_t dwLastProps = FX_GetUnicodeProperties(wLast);
if ((dwLastProps & FX_CHARTYPEBITSMASK) ==
FX_CHARTYPE_Combination) {
CFX_Rect rtBox;
if (pFont->GetCharBBox(wLast, &rtBox, false))
pCharPos->m_Origin.y -= fFontSize * rtBox.height / iMaxHeight;
}
}
}
CFX_PointF ptOffset;
if (bVerticalChar && (dwProps & 0x00010000) != 0) {
CFX_Rect rtBBox;
if (pFont->GetCharBBox(wForm, &rtBBox, false)) {
ptOffset.x = fFontSize * (850 - rtBBox.right()) / iMaxHeight;
ptOffset.y = fFontSize * (iAscent - rtBBox.top - 150) / iMaxHeight;
}
}
pCharPos->m_Origin.x += ptOffset.x;
pCharPos->m_Origin.y -= ptOffset.y;
}
if (!bRTLPiece && chartype != FX_CHARTYPE_Combination) {
if (bVerticalDoc)
fY += fCharHeight;
else
fX += fCharWidth;
}
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_bGlyphAdjust = true;
if (bVerticalDoc) {
if (iCharRotation == 0) {
pCharPos->m_AdjustMatrix[0] = -1;
pCharPos->m_AdjustMatrix[1] = 0;
pCharPos->m_AdjustMatrix[2] = 0;
pCharPos->m_AdjustMatrix[3] = 1;
pCharPos->m_Origin.y += fAscent;
} else if (iCharRotation == 1) {
pCharPos->m_AdjustMatrix[0] = 0;
pCharPos->m_AdjustMatrix[1] = -1;
pCharPos->m_AdjustMatrix[2] = -1;
pCharPos->m_AdjustMatrix[3] = 0;
pCharPos->m_Origin.x -= fDescent;
} else if (iCharRotation == 2) {
pCharPos->m_AdjustMatrix[0] = 1;
pCharPos->m_AdjustMatrix[1] = 0;
pCharPos->m_AdjustMatrix[2] = 0;
pCharPos->m_AdjustMatrix[3] = -1;
pCharPos->m_Origin.x += fCharWidth;
pCharPos->m_Origin.y += fAscent;
} else {
pCharPos->m_AdjustMatrix[0] = 0;
pCharPos->m_AdjustMatrix[1] = 1;
pCharPos->m_AdjustMatrix[2] = 1;
pCharPos->m_AdjustMatrix[3] = 0;
pCharPos->m_Origin.x += fAscent;
}
} else {
if (iCharRotation == 0) {
pCharPos->m_AdjustMatrix[0] = -1;
pCharPos->m_AdjustMatrix[1] = 0;
pCharPos->m_AdjustMatrix[2] = 0;
pCharPos->m_AdjustMatrix[3] = 1;
} else if (iCharRotation == 1) {
pCharPos->m_AdjustMatrix[0] = 0;
pCharPos->m_AdjustMatrix[1] = -1;
pCharPos->m_AdjustMatrix[2] = -1;
pCharPos->m_AdjustMatrix[3] = 0;
pCharPos->m_Origin.x -= fDescent;
pCharPos->m_Origin.y -= fAscent + fDescent;
} else if (iCharRotation == 2) {
pCharPos->m_AdjustMatrix[0] = 1;
pCharPos->m_AdjustMatrix[1] = 0;
pCharPos->m_AdjustMatrix[2] = 0;
pCharPos->m_AdjustMatrix[3] = -1;
pCharPos->m_Origin.x += fCharWidth;
pCharPos->m_Origin.y -= fAscent;
} else {
pCharPos->m_AdjustMatrix[0] = 0;
pCharPos->m_AdjustMatrix[1] = 1;
pCharPos->m_AdjustMatrix[2] = 1;
pCharPos->m_AdjustMatrix[3] = 0;
pCharPos->m_Origin.x += fAscent;
}
}
if (iHorScale != 100 || iVerScale != 100) {
pCharPos->m_AdjustMatrix[0] =
pCharPos->m_AdjustMatrix[0] * iHorScale / 100.0f;
pCharPos->m_AdjustMatrix[1] =
pCharPos->m_AdjustMatrix[1] * iHorScale / 100.0f;
pCharPos->m_AdjustMatrix[2] =
pCharPos->m_AdjustMatrix[2] * iVerScale / 100.0f;
pCharPos->m_AdjustMatrix[3] =
pCharPos->m_AdjustMatrix[3] * iVerScale / 100.0f;
}
pCharPos++;
}
}
if (iWidth > 0)
wPrev = static_cast<FX_WCHAR>(formChars[0].wch);
wLast = wch;
}
return iCount;
}
std::vector<CFX_RectF> CFX_TxtBreak::GetCharRects(const FX_TXTRUN* pTxtRun,
bool bCharBBox) const {
if (!pTxtRun || pTxtRun->iLength < 1)
return std::vector<CFX_RectF>();
IFX_TxtAccess* pAccess = pTxtRun->pAccess;
const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity;
const FX_WCHAR* pStr = pTxtRun->wsStr.c_str();
int32_t* pWidths = pTxtRun->pWidths;
int32_t iLength = pTxtRun->iLength;
CFX_RectF rect(*pTxtRun->pRect);
FX_FLOAT fFontSize = pTxtRun->fFontSize;
int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
FX_FLOAT fScale = fFontSize / 1000.0f;
CFX_RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
if (!pFont)
bCharBBox = false;
CFX_Rect bbox;
if (bCharBBox)
bCharBBox = pFont->GetBBox(&bbox);
FX_FLOAT fLeft = std::max(0.0f, bbox.left * fScale);
FX_FLOAT fHeight = FXSYS_fabs(bbox.height * fScale);
bool bRTLPiece = !!(pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel);
bool bVertical = !!(pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_VerticalLayout);
bool bSingleLine = !!(pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_SingleLine);
bool bCombText = !!(pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_CombText);
FX_WCHAR wch;
FX_WCHAR wLineBreakChar = pTxtRun->wLineBreakChar;
int32_t iCharSize;
FX_FLOAT fCharSize;
FX_FLOAT fStart;
if (bVertical)
fStart = bRTLPiece ? rect.bottom() : rect.top;
else
fStart = bRTLPiece ? rect.right() : rect.left;
std::vector<CFX_RectF> rtArray(iLength);
for (int32_t i = 0; i < iLength; i++) {
if (pAccess) {
wch = pAccess->GetChar(pIdentity, i);
iCharSize = pAccess->GetWidth(pIdentity, i);
} else {
wch = *pStr++;
iCharSize = *pWidths++;
}
fCharSize = static_cast<FX_FLOAT>(iCharSize) / 20000.0f;
bool bRet = (!bSingleLine && FX_IsCtrlCode(wch));
if (!(wch == L'\v' || wch == L'\f' || wch == 0x2028 || wch == 0x2029 ||
(wLineBreakChar != 0xFEFF && wch == wLineBreakChar))) {
bRet = false;
}
if (bRet) {
iCharSize = iFontSize * 500;
fCharSize = fFontSize / 2.0f;
}
if (bVertical) {
rect.top = fStart;
if (bRTLPiece) {
rect.top -= fCharSize;
fStart -= fCharSize;
} else {
fStart += fCharSize;
}
rect.height = fCharSize;
} else {
rect.left = fStart;
if (bRTLPiece) {
rect.left -= fCharSize;
fStart -= fCharSize;
} else {
fStart += fCharSize;
}
rect.width = fCharSize;
}
if (bCharBBox && !bRet) {
int32_t iCharWidth = 1000;
pFont->GetCharWidth(wch, iCharWidth, false);
FX_FLOAT fRTLeft = 0, fCharWidth = 0;
if (iCharWidth > 0) {
fCharWidth = iCharWidth * fScale;
fRTLeft = fLeft;
if (bCombText)
fRTLeft = (rect.width - fCharWidth) / 2.0f;
}
CFX_RectF rtBBoxF;
if (bVertical) {
rtBBoxF.top = rect.left + fRTLeft;
rtBBoxF.left = rect.top + (rect.height - fHeight) / 2.0f;
rtBBoxF.height = fCharWidth;
rtBBoxF.width = fHeight;
rtBBoxF.left = std::max(rtBBoxF.left, 0.0f);
} else {
rtBBoxF.left = rect.left + fRTLeft;
rtBBoxF.top = rect.top + (rect.height - fHeight) / 2.0f;
rtBBoxF.width = fCharWidth;
rtBBoxF.height = fHeight;
rtBBoxF.top = std::max(rtBBoxF.top, 0.0f);
}
rtArray[i] = rtBBoxF;
continue;
}
rtArray[i] = rect;
}
return rtArray;
}
FX_TXTRUN::FX_TXTRUN()
: pAccess(nullptr),
pIdentity(nullptr),
pWidths(nullptr),
iLength(0),
pFont(nullptr),
fFontSize(12),
dwStyles(0),
iHorizontalScale(100),
iVerticalScale(100),
iCharRotation(0),
dwCharStyles(0),
pRect(nullptr),
wLineBreakChar(L'\n'),
bSkipSpace(true) {}
FX_TXTRUN::~FX_TXTRUN() {}
FX_TXTRUN::FX_TXTRUN(const FX_TXTRUN& other) = default;
CFX_TxtPiece::CFX_TxtPiece()
: m_dwStatus(FX_TXTBREAK_PieceBreak),
m_iStartPos(0),
m_iWidth(-1),
m_iStartChar(0),
m_iChars(0),
m_iBidiLevel(0),
m_iBidiPos(0),
m_iHorizontalScale(100),
m_iVerticalScale(100),
m_dwCharStyles(0),
m_pChars(nullptr),
m_pUserData(nullptr) {}
CFX_TxtLine::CFX_TxtLine(int32_t iBlockSize)
: m_pLineChars(new std::vector<CFX_TxtChar>),
m_pLinePieces(new CFX_TxtPieceArray(16)),
m_iStart(0),
m_iWidth(0),
m_iArabicChars(0) {}
CFX_TxtLine::~CFX_TxtLine() {
RemoveAll();
}