// 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/cfx_txtbreak.h"
#include <algorithm>
#include "core/fxcrt/fx_arabic.h"
#include "core/fxcrt/fx_bidi.h"
#include "core/fxcrt/fx_memory.h"
#include "third_party/base/ptr_util.h"
#include "xfa/fde/cfde_texteditengine.h"
#include "xfa/fgas/font/cfgas_gefont.h"
#include "xfa/fgas/layout/cfx_linebreak.h"
namespace {
bool IsCtrlCode(wchar_t ch) {
uint32_t dwRet = (FX_GetUnicodeProperties(ch) & FX_CHARTYPEBITSMASK);
return dwRet == FX_CHARTYPE_Tab || dwRet == FX_CHARTYPE_Control;
}
} // namespace
CFX_TxtBreak::CFX_TxtBreak()
: CFX_Break(FX_LAYOUTSTYLE_None),
m_iAlignment(CFX_TxtLineAlignment_Left),
m_iCombWidth(360000) {}
CFX_TxtBreak::~CFX_TxtBreak() {}
void CFX_TxtBreak::SetLineWidth(float fLineWidth) {
m_iLineWidth = FXSYS_round(fLineWidth * 20000.0f);
ASSERT(m_iLineWidth >= 20000);
}
void CFX_TxtBreak::SetAlignment(int32_t iAlignment) {
ASSERT(iAlignment >= CFX_TxtLineAlignment_Left &&
iAlignment <= CFX_TxtLineAlignment_Justified);
m_iAlignment = iAlignment;
}
void CFX_TxtBreak::SetCombWidth(float fCombWidth) {
m_iCombWidth = FXSYS_round(fCombWidth * 20000.0f);
}
void CFX_TxtBreak::AppendChar_Combination(CFX_Char* pCurChar) {
wchar_t wch = pCurChar->char_code();
wchar_t wForm;
int32_t iCharWidth = 0;
pCurChar->m_iCharWidth = -1;
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
wForm = wch;
CFX_Char* pLastChar = GetLastChar(0, false, false);
if (pLastChar &&
(pLastChar->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicShadda) == 0) {
bool bShadda = false;
if (wch == 0x0651) {
wchar_t wLast = pLastChar->char_code();
if (wLast >= 0x064C && wLast <= 0x0650) {
wForm = FX_GetArabicFromShaddaTable(wLast);
bShadda = true;
}
} else if (wch >= 0x064C && wch <= 0x0650) {
if (pLastChar->char_code() == 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))
iCharWidth = 0;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorizontalScale / 100;
}
pCurChar->m_iCharWidth = -iCharWidth;
}
void CFX_TxtBreak::AppendChar_Tab(CFX_Char* pCurChar) {
m_eCharType = FX_CHARTYPE_Tab;
}
CFX_BreakType CFX_TxtBreak::AppendChar_Control(CFX_Char* pCurChar) {
m_eCharType = FX_CHARTYPE_Control;
CFX_BreakType dwRet = CFX_BreakType::None;
if (!m_bSingleLine) {
wchar_t wch = pCurChar->char_code();
switch (wch) {
case L'\v':
case 0x2028:
dwRet = CFX_BreakType::Line;
break;
case L'\f':
dwRet = CFX_BreakType::Page;
break;
case 0x2029:
dwRet = CFX_BreakType::Paragraph;
break;
default:
if (wch == m_wParagraphBreakChar)
dwRet = CFX_BreakType::Paragraph;
break;
}
if (dwRet != CFX_BreakType::None)
dwRet = EndBreak(dwRet);
}
return dwRet;
}
CFX_BreakType CFX_TxtBreak::AppendChar_Arabic(CFX_Char* pCurChar) {
FX_CHARTYPE chartype = pCurChar->GetCharType();
int32_t& iLineWidth = m_pCurLine->m_iWidth;
wchar_t wForm;
int32_t iCharWidth = 0;
CFX_Char* pLastChar = nullptr;
bool bAlef = false;
if (!m_bCombText && m_eCharType >= FX_CHARTYPE_ArabicAlef &&
m_eCharType <= FX_CHARTYPE_ArabicDistortion) {
pLastChar = GetLastChar(1, true, false);
if (pLastChar) {
iCharWidth = pLastChar->m_iCharWidth;
if (iCharWidth > 0)
iLineWidth -= iCharWidth;
CFX_Char* pPrevChar = GetLastChar(2, true, false);
wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar);
bAlef = (wForm == 0xFEFF &&
pLastChar->GetCharType() == FX_CHARTYPE_ArabicAlef);
m_pFont->GetCharWidth(wForm, iCharWidth);
if (wForm == 0xFEFF)
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorizontalScale / 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 {
m_pFont->GetCharWidth(wForm, iCharWidth);
if (wForm == 0xFEFF)
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorizontalScale / 100;
}
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
m_pCurLine->m_iArabicChars++;
if (!m_bSingleLine && iLineWidth > m_iLineWidth + m_iTolerance)
return EndBreak(CFX_BreakType::Line);
return CFX_BreakType::None;
}
CFX_BreakType CFX_TxtBreak::AppendChar_Others(CFX_Char* pCurChar) {
FX_CHARTYPE chartype = pCurChar->GetCharType();
int32_t& iLineWidth = m_pCurLine->m_iWidth;
int32_t iCharWidth = 0;
m_eCharType = chartype;
wchar_t wch = pCurChar->char_code();
wchar_t wForm = wch;
if (m_bCombText) {
iCharWidth = m_iCombWidth;
} else {
if (!m_pFont->GetCharWidth(wForm, iCharWidth))
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth = iCharWidth * m_iHorizontalScale / 100;
}
iCharWidth += m_iCharSpace;
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
if (!m_bSingleLine && chartype != FX_CHARTYPE_Space &&
iLineWidth > m_iLineWidth + m_iTolerance) {
return EndBreak(CFX_BreakType::Line);
}
return CFX_BreakType::None;
}
CFX_BreakType CFX_TxtBreak::AppendChar(wchar_t wch) {
uint32_t dwProps = FX_GetUnicodeProperties(wch);
FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps);
m_pCurLine->m_LineChars.emplace_back(wch, dwProps, m_iHorizontalScale,
m_iVerticalScale);
CFX_Char* pCurChar = &m_pCurLine->m_LineChars.back();
pCurChar->m_dwCharStyles = m_iAlignment | (1 << 8);
CFX_BreakType dwRet1 = CFX_BreakType::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(CFX_BreakType::Line);
int32_t iCount = m_pCurLine->CountChars();
if (iCount > 0)
pCurChar = &m_pCurLine->m_LineChars[iCount - 1];
}
CFX_BreakType dwRet2 = CFX_BreakType::None;
if (wch == m_wParagraphBreakChar) {
// This is handled in AppendChar_Control, but it seems like \n and \r
// don't get matched as control characters so we go into AppendChar_other
// and never detect the new paragraph ...
dwRet2 = CFX_BreakType::Paragraph;
} else {
switch (chartype) {
case FX_CHARTYPE_Tab:
AppendChar_Tab(pCurChar);
break;
case FX_CHARTYPE_Control:
dwRet2 = AppendChar_Control(pCurChar);
break;
case FX_CHARTYPE_Combination:
AppendChar_Combination(pCurChar);
break;
case FX_CHARTYPE_ArabicAlef:
case FX_CHARTYPE_ArabicSpecial:
case FX_CHARTYPE_ArabicDistortion:
case FX_CHARTYPE_ArabicNormal:
case FX_CHARTYPE_ArabicForm:
case FX_CHARTYPE_Arabic:
dwRet2 = AppendChar_Arabic(pCurChar);
break;
case FX_CHARTYPE_Unknown:
case FX_CHARTYPE_Space:
case FX_CHARTYPE_Numeric:
case FX_CHARTYPE_Normal:
default:
dwRet2 = AppendChar_Others(pCurChar);
break;
}
}
return std::max(dwRet1, dwRet2);
}
bool CFX_TxtBreak::EndBreak_SplitLine(CFX_BreakLine* pNextLine,
bool bAllChars) {
int32_t iCount = m_pCurLine->CountChars();
bool bDone = false;
CFX_Char* pTC;
if (!m_bSingleLine && m_pCurLine->m_iWidth > m_iLineWidth + m_iTolerance) {
pTC = m_pCurLine->GetChar(iCount - 1);
switch (pTC->GetCharType()) {
case FX_CHARTYPE_Tab:
case FX_CHARTYPE_Control:
case FX_CHARTYPE_Space:
break;
default:
SplitTextLine(m_pCurLine, pNextLine, bAllChars);
bDone = true;
break;
}
}
iCount = m_pCurLine->CountChars();
CFX_BreakPiece tp;
if (bAllChars && !bDone) {
int32_t iEndPos = m_pCurLine->m_iWidth;
GetBreakPos(m_pCurLine->m_LineChars, iEndPos, bAllChars, true);
}
return false;
}
void CFX_TxtBreak::EndBreak_BidiLine(std::deque<FX_TPO>* tpos,
CFX_BreakType dwStatus) {
CFX_BreakPiece tp;
FX_TPO tpo;
CFX_Char* pTC;
std::vector<CFX_Char>& chars = m_pCurLine->m_LineChars;
int32_t iCount = m_pCurLine->CountChars();
bool bDone = m_pCurLine->m_iArabicChars > 0;
if (bDone) {
ASSERT(iCount >= 0);
size_t iBidiNum = 0;
for (size_t i = 0; i < static_cast<size_t>(iCount); ++i) {
pTC = &chars[i];
pTC->m_iBidiPos = static_cast<int32_t>(i);
if (pTC->GetCharType() != FX_CHARTYPE_Control)
iBidiNum = i;
if (i == 0)
pTC->m_iBidiLevel = 1;
}
FX_BidiLine(&chars, iBidiNum + 1);
}
if (bDone) {
tp.m_dwStatus = CFX_BreakType::Piece;
tp.m_iStartPos = m_pCurLine->m_iStart;
tp.m_pChars = &m_pCurLine->m_LineChars;
int32_t iBidiLevel = -1;
int32_t iCharWidth;
int32_t i = 0;
int32_t 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_iHorizontalScale = pTC->horizonal_scale();
tp.m_iVerticalScale = pTC->vertical_scale();
tp.m_dwStatus = CFX_BreakType::Piece;
}
if (iBidiLevel != pTC->m_iBidiLevel ||
pTC->m_dwStatus != CFX_BreakType::None) {
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;
m_pCurLine->m_LinePieces.push_back(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;
m_pCurLine->m_LinePieces.push_back(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_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index];
ttp.m_iStartPos = iStartPos;
iStartPos += ttp.m_iWidth;
}
}
m_pCurLine->m_LinePieces[j].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_LineChars;
pTC = &chars[0];
tp.m_dwCharStyles = pTC->m_dwCharStyles;
tp.m_iHorizontalScale = pTC->horizonal_scale();
tp.m_iVerticalScale = pTC->vertical_scale();
m_pCurLine->m_LinePieces.push_back(tp);
tpos->push_back({0, 0});
}
}
void CFX_TxtBreak::EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
bool bAllChars,
CFX_BreakType dwStatus) {
int32_t iNetWidth = m_pCurLine->m_iWidth;
int32_t iGapChars = 0;
bool bFind = false;
for (auto it = tpos.rbegin(); it != tpos.rend(); ++it) {
CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[it->index];
if (!bFind)
iNetWidth = ttp.GetEndPos();
bool bArabic = FX_IsOdd(ttp.m_iBidiLevel);
int32_t j = bArabic ? 0 : ttp.m_iChars - 1;
while (j > -1 && j < ttp.m_iChars) {
const CFX_Char* pTC = ttp.GetChar(j);
if (pTC->m_nBreakType == FX_LBT_DIRECT_BRK)
iGapChars++;
if (!bFind || !bAllChars) {
FX_CHARTYPE chartype = pTC->GetCharType();
if (chartype == FX_CHARTYPE_Space || chartype == FX_CHARTYPE_Control) {
if (!bFind && bAllChars && pTC->m_iCharWidth > 0)
iNetWidth -= pTC->m_iCharWidth;
} else {
bFind = true;
if (!bAllChars)
break;
}
}
j += bArabic ? 1 : -1;
}
if (!bAllChars && bFind)
break;
}
int32_t iOffset = m_iLineWidth - iNetWidth;
if (iGapChars > 0 && m_iAlignment & CFX_TxtLineAlignment_Justified &&
dwStatus != CFX_BreakType::Paragraph) {
int32_t iStart = -1;
for (auto& tpo : tpos) {
CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index];
if (iStart < -1)
iStart = ttp.m_iStartPos;
else
ttp.m_iStartPos = iStart;
for (int32_t j = 0; j < ttp.m_iChars; j++) {
CFX_Char* pTC = ttp.GetChar(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 (m_iAlignment & CFX_TxtLineAlignment_Center ||
m_iAlignment & CFX_TxtLineAlignment_Right) {
if (m_iAlignment & CFX_TxtLineAlignment_Center &&
!(m_iAlignment & CFX_TxtLineAlignment_Right)) {
iOffset /= 2;
}
if (iOffset > 0) {
for (auto& ttp : m_pCurLine->m_LinePieces)
ttp.m_iStartPos += iOffset;
}
}
}
CFX_BreakType CFX_TxtBreak::EndBreak(CFX_BreakType dwStatus) {
ASSERT(dwStatus != CFX_BreakType::None);
if (!m_pCurLine->m_LinePieces.empty()) {
if (dwStatus != CFX_BreakType::Piece)
m_pCurLine->m_LinePieces.back().m_dwStatus = dwStatus;
return m_pCurLine->m_LinePieces.back().m_dwStatus;
}
if (HasLine()) {
if (!m_Line[m_iReadyLineIndex].m_LinePieces.empty()) {
if (dwStatus != CFX_BreakType::Piece)
m_Line[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus = dwStatus;
return m_Line[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus;
}
return CFX_BreakType::None;
}
int32_t iCount = m_pCurLine->CountChars();
if (iCount < 1)
return CFX_BreakType::None;
m_pCurLine->GetChar(iCount - 1)->m_dwStatus = dwStatus;
if (dwStatus == CFX_BreakType::Piece)
return dwStatus;
m_iReadyLineIndex = m_pCurLine == &m_Line[0] ? 0 : 1;
CFX_BreakLine* pNextLine = &m_Line[1 - m_iReadyLineIndex];
bool bAllChars = m_iAlignment > CFX_TxtLineAlignment_Right;
if (!EndBreak_SplitLine(pNextLine, bAllChars)) {
std::deque<FX_TPO> tpos;
EndBreak_BidiLine(&tpos, dwStatus);
if (m_iAlignment > CFX_TxtLineAlignment_Left)
EndBreak_Alignment(tpos, bAllChars, dwStatus);
}
m_pCurLine = pNextLine;
CFX_Char* pTC = GetLastChar(0, false, false);
m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE_Unknown;
return dwStatus;
}
int32_t CFX_TxtBreak::GetBreakPos(std::vector<CFX_Char>& 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;
}
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->char_props();
nNext = nCodeProp & 0x003F;
int32_t iCharWidth = pCur->m_iCharWidth;
if (iCharWidth > 0)
iEndPos -= iCharWidth;
while (iLength >= 0) {
pCur = &ca[iLength];
nCodeProp = pCur->char_props();
nCur = nCodeProp & 0x003F;
if (nNext == kBreakPropertySpace)
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 == kBreakPropertySpace) {
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_BreakLine* pCurLine,
CFX_BreakLine* pNextLine,
bool bAllChars) {
ASSERT(pCurLine && pNextLine);
int32_t iCount = pCurLine->CountChars();
if (iCount < 2)
return;
int32_t iEndPos = pCurLine->m_iWidth;
std::vector<CFX_Char>& curChars = pCurLine->m_LineChars;
int32_t iCharPos = GetBreakPos(curChars, iEndPos, bAllChars, false);
if (iCharPos < 0)
iCharPos = 0;
iCharPos++;
if (iCharPos >= iCount) {
pNextLine->Clear();
CFX_Char* pTC = &curChars[iCharPos - 1];
pTC->m_nBreakType = FX_LBT_UNKNOWN;
return;
}
pNextLine->m_LineChars =
std::vector<CFX_Char>(curChars.begin() + iCharPos, curChars.end());
curChars.erase(curChars.begin() + iCharPos, curChars.end());
pCurLine->m_iWidth = iEndPos;
CFX_Char* pTC = &curChars[iCharPos - 1];
pTC->m_nBreakType = FX_LBT_UNKNOWN;
iCount = pdfium::CollectionSize<int>(pNextLine->m_LineChars);
int32_t iWidth = 0;
for (int32_t i = 0; i < iCount; i++) {
if (pNextLine->m_LineChars[i].GetCharType() >= FX_CHARTYPE_ArabicAlef) {
pCurLine->m_iArabicChars--;
pNextLine->m_iArabicChars++;
}
iWidth += std::max(0, pNextLine->m_LineChars[i].m_iCharWidth);
pNextLine->m_LineChars[i].m_dwStatus = CFX_BreakType::None;
}
pNextLine->m_iWidth = iWidth;
}
struct FX_FORMCHAR {
uint16_t wch;
uint16_t wForm;
int32_t iWidth;
};
int32_t CFX_TxtBreak::GetDisplayPos(const FX_TXTRUN* pTxtRun,
FXTEXT_CHARPOS* pCharPos) const {
if (!pTxtRun || pTxtRun->iLength < 1)
return 0;
CFDE_TextEditEngine* pEngine = pTxtRun->pEdtEngine;
const wchar_t* pStr = pTxtRun->wsStr.c_str();
int32_t* pWidths = pTxtRun->pWidths;
int32_t iLength = pTxtRun->iLength - 1;
RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
uint32_t dwStyles = pTxtRun->dwStyles;
CFX_RectF rtText(*pTxtRun->pRect);
bool bRTLPiece = (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0;
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;
float fFontHeight = fFontSize;
float fAscent = fFontHeight * (float)iAscent / (float)iMaxHeight;
float fX = rtText.left;
float fY;
float fCharWidth;
int32_t iHorScale = pTxtRun->iHorizontalScale;
int32_t iVerScale = pTxtRun->iVerticalScale;
bool bSkipSpace = pTxtRun->bSkipSpace;
FX_FORMCHAR formChars[3];
float fYBase;
if (bRTLPiece)
fX = rtText.right();
fYBase = rtText.top + (rtText.height - fFontSize) / 2.0f;
fY = fYBase + fAscent;
int32_t iCount = 0;
int32_t iNext = 0;
wchar_t wPrev = 0xFEFF;
wchar_t wNext = 0xFEFF;
wchar_t wForm = 0xFEFF;
wchar_t wLast = 0xFEFF;
bool bShadda = false;
bool bLam = false;
for (int32_t i = 0; i <= iLength; i++) {
int32_t iWidth;
wchar_t wch;
if (pEngine) {
wch = pEngine->GetChar(i);
iWidth = pEngine->GetWidthOfChar(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 (pEngine) {
iNext = i + 1;
while (iNext <= iLength) {
wNext = pEngine->GetChar(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 (pEngine) {
iNext = i + 1;
if (iNext <= iLength)
wNext = pEngine->GetChar(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;
} else if (wch == L'.') {
wForm = wch;
} else if (wch == L',') {
wForm = wch;
} else if (bRTLPiece) {
wForm = FX_GetMirrorChar(wch, dwProps);
} else {
wForm = wch;
}
if (chartype != FX_CHARTYPE_Combination)
bShadda = false;
if (chartype < FX_CHARTYPE_ArabicAlef)
bLam = false;
dwProps = FX_GetUnicodeProperties(wForm);
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);
formChars[1].iWidth = iCharWidth;
formChars[2].wForm = 0x0670;
iCharWidth = 0;
pFont->GetCharWidth(0x0670, iCharWidth);
formChars[2].iWidth = iCharWidth;
}
for (int32_t j = 0; j < iForms; j++) {
wForm = (wchar_t)formChars[j].wForm;
iCharWidth = formChars[j].iWidth;
if (j > 0) {
chartype = FX_CHARTYPE_Combination;
wch = wForm;
wLast = (wchar_t)formChars[j - 1].wForm;
}
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wForm);
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
pCharPos->m_ExtGID = pCharPos->m_GlyphIndex;
#endif
pCharPos->m_FontCharWidth = iCharWidth;
}
fCharWidth = fFontSize * iCharWidth / 1000.0f;
if (bRTLPiece && chartype != FX_CHARTYPE_Combination)
fX -= fCharWidth;
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_Origin = CFX_PointF(fX, fY);
if ((dwStyles & FX_LAYOUTSTYLE_CombText) != 0) {
int32_t iFormWidth = iCharWidth;
pFont->GetCharWidth(wForm, iFormWidth);
float fOffset = fFontSize * (iCharWidth - iFormWidth) / 2000.0f;
pCharPos->m_Origin.x += fOffset;
}
if (chartype == FX_CHARTYPE_Combination) {
CFX_Rect rtBBox;
if (pFont->GetCharBBox(wForm, &rtBBox)) {
pCharPos->m_Origin.y =
fYBase + fFontSize -
fFontSize * (float)rtBBox.height / (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))
pCharPos->m_Origin.y -= fFontSize * rtBox.height / iMaxHeight;
}
}
}
}
if (!bRTLPiece && chartype != FX_CHARTYPE_Combination)
fX += fCharWidth;
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
pCharPos->m_bGlyphAdjust = true;
pCharPos->m_AdjustMatrix[0] = -1;
pCharPos->m_AdjustMatrix[1] = 0;
pCharPos->m_AdjustMatrix[2] = 0;
pCharPos->m_AdjustMatrix[3] = 1;
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<wchar_t>(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>();
CFDE_TextEditEngine* pEngine = pTxtRun->pEdtEngine;
const wchar_t* pStr = pTxtRun->wsStr.c_str();
int32_t* pWidths = pTxtRun->pWidths;
int32_t iLength = pTxtRun->iLength;
CFX_RectF rect(*pTxtRun->pRect);
float fFontSize = pTxtRun->fFontSize;
int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
float fScale = fFontSize / 1000.0f;
RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
if (!pFont)
bCharBBox = false;
CFX_Rect bbox;
if (bCharBBox)
bCharBBox = pFont->GetBBox(&bbox);
float fLeft = std::max(0.0f, bbox.left * fScale);
float fHeight = fabs(bbox.height * fScale);
bool bRTLPiece = !!(pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel);
bool bSingleLine = !!(pTxtRun->dwStyles & FX_LAYOUTSTYLE_SingleLine);
bool bCombText = !!(pTxtRun->dwStyles & FX_LAYOUTSTYLE_CombText);
wchar_t wch;
int32_t iCharSize;
float fCharSize;
float fStart = bRTLPiece ? rect.right() : rect.left;
std::vector<CFX_RectF> rtArray(iLength);
for (int32_t i = 0; i < iLength; i++) {
if (pEngine) {
wch = pEngine->GetChar(i);
iCharSize = pEngine->GetWidthOfChar(i);
} else {
wch = *pStr++;
iCharSize = *pWidths++;
}
fCharSize = static_cast<float>(iCharSize) / 20000.0f;
bool bRet = (!bSingleLine && IsCtrlCode(wch));
if (!(wch == L'\v' || wch == L'\f' || wch == 0x2028 || wch == 0x2029 ||
wch == L'\n')) {
bRet = false;
}
if (bRet) {
iCharSize = iFontSize * 500;
fCharSize = fFontSize / 2.0f;
}
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);
float fRTLeft = 0, fCharWidth = 0;
if (iCharWidth > 0) {
fCharWidth = iCharWidth * fScale;
fRTLeft = fLeft;
if (bCombText)
fRTLeft = (rect.width - fCharWidth) / 2.0f;
}
CFX_RectF rtBBoxF;
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()
: pEdtEngine(nullptr),
pIdentity(nullptr),
pWidths(nullptr),
iLength(0),
pFont(nullptr),
fFontSize(12),
dwStyles(0),
iHorizontalScale(100),
iVerticalScale(100),
dwCharStyles(0),
pRect(nullptr),
bSkipSpace(true) {}
FX_TXTRUN::~FX_TXTRUN() {}
FX_TXTRUN::FX_TXTRUN(const FX_TXTRUN& other) = default;