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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
#include "xfa/fgas/layout/cfx_rtfbreak.h"
#include <algorithm>
#include "core/fxcrt/fx_arabic.h"
#include "core/fxcrt/fx_bidi.h"
#include "core/fxge/cfx_renderdevice.h"
#include "third_party/base/numerics/safe_math.h"
#include "third_party/base/stl_util.h"
#include "xfa/fgas/font/cfgas_gefont.h"
#include "xfa/fgas/layout/cfx_linebreak.h"
CFX_RTFBreak::CFX_RTFBreak(uint32_t dwLayoutStyles)
: CFX_Break(dwLayoutStyles),
m_bPagination(false),
m_iAlignment(CFX_RTFLineAlignment::Left) {
SetBreakStatus();
m_bPagination = !!(m_dwLayoutStyles & FX_LAYOUTSTYLE_Pagination);
}
CFX_RTFBreak::~CFX_RTFBreak() {}
void CFX_RTFBreak::SetLineStartPos(float fLinePos) {
int32_t iLinePos = FXSYS_round(fLinePos * kConversionFactor);
iLinePos = std::min(iLinePos, m_iLineWidth);
iLinePos = std::max(iLinePos, m_iLineStart);
m_pCurLine->m_iStart = iLinePos;
}
void CFX_RTFBreak::AddPositionedTab(float fTabPos) {
int32_t iTabPos = std::min(
FXSYS_round(fTabPos * kConversionFactor) + m_iLineStart, m_iLineWidth);
auto it = std::lower_bound(m_PositionedTabs.begin(), m_PositionedTabs.end(),
iTabPos);
if (it != m_PositionedTabs.end() && *it == iTabPos)
return;
m_PositionedTabs.insert(it, iTabPos);
}
void CFX_RTFBreak::SetUserData(const RetainPtr<CXFA_TextUserData>& pUserData) {
if (m_pUserData == pUserData)
return;
SetBreakStatus();
m_pUserData = pUserData;
}
int32_t CFX_RTFBreak::GetLastPositionedTab() const {
return m_PositionedTabs.empty() ? m_iLineStart : m_PositionedTabs.back();
}
bool CFX_RTFBreak::GetPositionedTab(int32_t* iTabPos) const {
auto it = std::upper_bound(m_PositionedTabs.begin(), m_PositionedTabs.end(),
*iTabPos);
if (it == m_PositionedTabs.end())
return false;
*iTabPos = *it;
return true;
}
CFX_BreakType CFX_RTFBreak::AppendChar(wchar_t wch) {
ASSERT(m_pFont && m_pCurLine);
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_iFontSize = m_iFontSize;
pCurChar->m_dwIdentity = m_dwIdentity;
pCurChar->m_pUserData = m_pUserData;
CFX_BreakType dwRet1 = CFX_BreakType::None;
if (chartype != FX_CHARTYPE_Combination &&
GetUnifiedCharType(m_eCharType) != GetUnifiedCharType(chartype) &&
m_eCharType != FX_CHARTYPE_Unknown &&
m_pCurLine->GetLineEnd() > m_iLineWidth + m_iTolerance &&
(m_eCharType != FX_CHARTYPE_Space || chartype != FX_CHARTYPE_Control)) {
dwRet1 = EndBreak(CFX_BreakType::Line);
if (!m_pCurLine->m_LineChars.empty())
pCurChar = &m_pCurLine->m_LineChars.back();
}
CFX_BreakType dwRet2 = CFX_BreakType::None;
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;
}
m_eCharType = chartype;
return std::max(dwRet1, dwRet2);
}
void CFX_RTFBreak::AppendChar_Combination(CFX_Char* pCurChar) {
FX_SAFE_INT32 iCharWidth = 0;
int32_t iCharWidthOut;
if (m_pFont->GetCharWidth(pCurChar->char_code(), &iCharWidthOut))
iCharWidth = iCharWidthOut;
iCharWidth *= m_iFontSize;
iCharWidth *= m_iHorizontalScale;
iCharWidth /= 100;
CFX_Char* pLastChar = GetLastChar(0, false, true);
if (pLastChar && pLastChar->GetCharType() > FX_CHARTYPE_Combination)
iCharWidth *= -1;
else
m_eCharType = FX_CHARTYPE_Combination;
int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0);
pCurChar->m_iCharWidth = iCharWidthValid;
if (iCharWidthValid > 0) {
pdfium::base::CheckedNumeric<int32_t> checked_width = m_pCurLine->m_iWidth;
checked_width += iCharWidthValid;
if (!checked_width.IsValid())
return;
m_pCurLine->m_iWidth = checked_width.ValueOrDie();
}
}
void CFX_RTFBreak::AppendChar_Tab(CFX_Char* pCurChar) {
if (!(m_dwLayoutStyles & FX_LAYOUTSTYLE_ExpandTab))
return;
int32_t& iLineWidth = m_pCurLine->m_iWidth;
int32_t iCharWidth = iLineWidth;
FX_SAFE_INT32 iSafeCharWidth;
if (GetPositionedTab(&iCharWidth)) {
iSafeCharWidth = iCharWidth;
} else {
// Tab width is >= 160000, so this part does not need to be checked.
ASSERT(m_iTabWidth >= kMinimumTabWidth);
iSafeCharWidth = iLineWidth / m_iTabWidth + 1;
iSafeCharWidth *= m_iTabWidth;
}
iSafeCharWidth -= iLineWidth;
iCharWidth = iSafeCharWidth.ValueOrDefault(0);
pCurChar->m_iCharWidth = iCharWidth;
iLineWidth += iCharWidth;
}
CFX_BreakType CFX_RTFBreak::AppendChar_Control(CFX_Char* pCurChar) {
CFX_BreakType dwRet2 = CFX_BreakType::None;
switch (pCurChar->char_code()) {
case L'\v':
case 0x2028:
dwRet2 = CFX_BreakType::Line;
break;
case L'\f':
dwRet2 = CFX_BreakType::Page;
break;
case 0x2029:
dwRet2 = CFX_BreakType::Paragraph;
break;
default:
if (pCurChar->char_code() == m_wParagraphBreakChar)
dwRet2 = CFX_BreakType::Paragraph;
break;
}
if (dwRet2 != CFX_BreakType::None)
dwRet2 = EndBreak(dwRet2);
return dwRet2;
}
CFX_BreakType CFX_RTFBreak::AppendChar_Arabic(CFX_Char* pCurChar) {
CFX_Char* pLastChar = nullptr;
wchar_t wForm;
bool bAlef = false;
if (m_eCharType >= FX_CHARTYPE_ArabicAlef &&
m_eCharType <= FX_CHARTYPE_ArabicDistortion) {
pLastChar = GetLastChar(1, false, true);
if (pLastChar) {
m_pCurLine->m_iWidth -= pLastChar->m_iCharWidth;
CFX_Char* pPrevChar = GetLastChar(2, false, true);
wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar);
bAlef = (wForm == 0xFEFF &&
pLastChar->GetCharType() == FX_CHARTYPE_ArabicAlef);
FX_SAFE_INT32 iCharWidth;
int32_t iCharWidthOut;
if (m_pFont->GetCharWidth(wForm, &iCharWidthOut) ||
m_pFont->GetCharWidth(pLastChar->char_code(), &iCharWidthOut)) {
iCharWidth = iCharWidthOut;
} else {
iCharWidth = m_iDefChar;
}
iCharWidth *= m_iFontSize;
iCharWidth *= m_iHorizontalScale;
iCharWidth /= 100;
int iCharWidthValid = iCharWidth.ValueOrDefault(0);
pLastChar->m_iCharWidth = iCharWidthValid;
pdfium::base::CheckedNumeric<int32_t> checked_width =
m_pCurLine->m_iWidth;
checked_width += iCharWidthValid;
if (!checked_width.IsValid())
return CFX_BreakType::None;
m_pCurLine->m_iWidth = checked_width.ValueOrDie();
iCharWidth = 0;
}
}
wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar,
nullptr);
FX_SAFE_INT32 iCharWidth;
int32_t iCharWidthOut;
if (m_pFont->GetCharWidth(wForm, &iCharWidthOut) ||
m_pFont->GetCharWidth(pCurChar->char_code(), &iCharWidthOut)) {
iCharWidth = iCharWidthOut;
} else {
iCharWidth = m_iDefChar;
}
iCharWidth *= m_iFontSize;
iCharWidth *= m_iHorizontalScale;
iCharWidth /= 100;
int iCharWidthValid = iCharWidth.ValueOrDefault(0);
pCurChar->m_iCharWidth = iCharWidthValid;
pdfium::base::CheckedNumeric<int32_t> checked_width = m_pCurLine->m_iWidth;
checked_width += iCharWidthValid;
if (!checked_width.IsValid())
return CFX_BreakType::None;
m_pCurLine->m_iWidth = checked_width.ValueOrDie();
m_pCurLine->m_iArabicChars++;
if (m_pCurLine->GetLineEnd() > m_iLineWidth + m_iTolerance)
return EndBreak(CFX_BreakType::Line);
return CFX_BreakType::None;
}
CFX_BreakType CFX_RTFBreak::AppendChar_Others(CFX_Char* pCurChar) {
FX_CHARTYPE chartype = pCurChar->GetCharType();
wchar_t wForm = pCurChar->char_code();
FX_SAFE_INT32 iCharWidth;
int32_t iCharWidthOut;
if (m_pFont->GetCharWidth(wForm, &iCharWidthOut))
iCharWidth = iCharWidthOut;
else
iCharWidth = m_iDefChar;
iCharWidth *= m_iFontSize;
iCharWidth *= m_iHorizontalScale;
iCharWidth /= 100;
iCharWidth += m_iCharSpace;
int iCharWidthValid = iCharWidth.ValueOrDefault(0);
pCurChar->m_iCharWidth = iCharWidthValid;
pdfium::base::CheckedNumeric<int32_t> checked_width = m_pCurLine->m_iWidth;
checked_width += iCharWidthValid;
if (!checked_width.IsValid())
return CFX_BreakType::None;
m_pCurLine->m_iWidth = checked_width.ValueOrDie();
if (chartype != FX_CHARTYPE_Space &&
m_pCurLine->GetLineEnd() > m_iLineWidth + m_iTolerance) {
return EndBreak(CFX_BreakType::Line);
}
return CFX_BreakType::None;
}
CFX_BreakType CFX_RTFBreak::EndBreak(CFX_BreakType dwStatus) {
ASSERT(dwStatus != CFX_BreakType::None);
++m_dwIdentity;
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;
}
if (m_pCurLine->m_LineChars.empty())
return CFX_BreakType::None;
CFX_Char* tc = m_pCurLine->GetChar(m_pCurLine->m_LineChars.size() - 1);
tc->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_RTFLineAlignment::Justified ||
m_iAlignment == CFX_RTFLineAlignment::Distributed;
if (!EndBreak_SplitLine(pNextLine, bAllChars, dwStatus)) {
std::deque<FX_TPO> tpos;
EndBreak_BidiLine(&tpos, dwStatus);
if (!m_bPagination && m_iAlignment != CFX_RTFLineAlignment::Left)
EndBreak_Alignment(tpos, bAllChars, dwStatus);
}
m_pCurLine = pNextLine;
m_pCurLine->m_iStart = m_iLineStart;
CFX_Char* pTC = GetLastChar(0, false, true);
m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE_Unknown;
return dwStatus;
}
bool CFX_RTFBreak::EndBreak_SplitLine(CFX_BreakLine* pNextLine,
bool bAllChars,
CFX_BreakType dwStatus) {
bool bDone = false;
if (m_pCurLine->GetLineEnd() > m_iLineWidth + m_iTolerance) {
const CFX_Char* tc =
m_pCurLine->GetChar(m_pCurLine->m_LineChars.size() - 1);
switch (tc->GetCharType()) {
case FX_CHARTYPE_Tab:
case FX_CHARTYPE_Control:
case FX_CHARTYPE_Space:
break;
default:
SplitTextLine(m_pCurLine.Get(), pNextLine, !m_bPagination && bAllChars);
bDone = true;
break;
}
}
if (!m_bPagination) {
if (bAllChars && !bDone) {
int32_t endPos = m_pCurLine->GetLineEnd();
GetBreakPos(m_pCurLine->m_LineChars, bAllChars, true, &endPos);
}
return false;
}
const CFX_Char* pCurChars = m_pCurLine->m_LineChars.data();
CFX_BreakPiece tp;
tp.m_pChars = &m_pCurLine->m_LineChars;
bool bNew = true;
uint32_t dwIdentity = static_cast<uint32_t>(-1);
int32_t iLast = pdfium::CollectionSize<int32_t>(m_pCurLine->m_LineChars) - 1;
int32_t j = 0;
for (int32_t i = 0; i <= iLast;) {
const CFX_Char* pTC = pCurChars + i;
if (bNew) {
tp.m_iStartChar = i;
tp.m_iStartPos += tp.m_iWidth;
tp.m_iWidth = 0;
tp.m_dwStatus = pTC->m_dwStatus;
tp.m_iFontSize = pTC->m_iFontSize;
tp.m_iHorizontalScale = pTC->horizonal_scale();
tp.m_iVerticalScale = pTC->vertical_scale();
dwIdentity = pTC->m_dwIdentity;
tp.m_dwIdentity = dwIdentity;
tp.m_pUserData = pTC->m_pUserData.As<CXFA_TextUserData>();
j = i;
bNew = false;
}
if (i == iLast || pTC->m_dwStatus != CFX_BreakType::None ||
pTC->m_dwIdentity != dwIdentity) {
tp.m_iChars = i - j;
if (pTC->m_dwIdentity == dwIdentity) {
tp.m_dwStatus = pTC->m_dwStatus;
tp.m_iWidth += pTC->m_iCharWidth;
tp.m_iChars += 1;
++i;
}
m_pCurLine->m_LinePieces.push_back(tp);
bNew = true;
} else {
tp.m_iWidth += pTC->m_iCharWidth;
++i;
}
}
return true;
}
void CFX_RTFBreak::EndBreak_BidiLine(std::deque<FX_TPO>* tpos,
CFX_BreakType dwStatus) {
CFX_Char* pTC;
std::vector<CFX_Char>& chars = m_pCurLine->m_LineChars;
if (!m_bPagination && m_pCurLine->m_iArabicChars > 0) {
size_t iBidiNum = 0;
for (size_t i = 0; i < m_pCurLine->m_LineChars.size(); ++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);
} else {
for (size_t i = 0; i < m_pCurLine->m_LineChars.size(); ++i) {
pTC = &chars[i];
pTC->m_iBidiLevel = 0;
pTC->m_iBidiPos = 0;
pTC->m_iBidiOrder = 0;
}
}
CFX_BreakPiece tp;
tp.m_dwStatus = CFX_BreakType::Piece;
tp.m_iStartPos = m_pCurLine->m_iStart;
tp.m_pChars = &chars;
int32_t iBidiLevel = -1;
int32_t iCharWidth;
FX_TPO tpo;
uint32_t dwIdentity = static_cast<uint32_t>(-1);
int32_t i = 0;
int32_t j = 0;
int32_t iCount = pdfium::CollectionSize<int32_t>(m_pCurLine->m_LineChars);
while (i < iCount) {
pTC = &chars[i];
if (iBidiLevel < 0) {
iBidiLevel = pTC->m_iBidiLevel;
iCharWidth = pTC->m_iCharWidth;
tp.m_iWidth = iCharWidth < 1 ? 0 : iCharWidth;
tp.m_iBidiLevel = iBidiLevel;
tp.m_iBidiPos = pTC->m_iBidiOrder;
tp.m_iFontSize = pTC->m_iFontSize;
tp.m_iHorizontalScale = pTC->horizonal_scale();
tp.m_iVerticalScale = pTC->vertical_scale();
dwIdentity = pTC->m_dwIdentity;
tp.m_dwIdentity = dwIdentity;
tp.m_pUserData = pTC->m_pUserData.As<CXFA_TextUserData>();
tp.m_dwStatus = CFX_BreakType::Piece;
++i;
} else if (iBidiLevel != pTC->m_iBidiLevel ||
pTC->m_dwIdentity != dwIdentity) {
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);
}
std::sort(tpos->begin(), tpos->end());
int32_t iStartPos = m_pCurLine->m_iStart;
for (const auto& it : *tpos) {
CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[it.index];
ttp.m_iStartPos = iStartPos;
iStartPos += ttp.m_iWidth;
}
}
void CFX_RTFBreak::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* tc = ttp.GetChar(j);
if (tc->m_nBreakType == FX_LBT_DIRECT_BRK)
++iGapChars;
if (!bFind || !bAllChars) {
uint32_t dwCharType = tc->GetCharType();
if (dwCharType == FX_CHARTYPE_Space ||
dwCharType == FX_CHARTYPE_Control) {
if (!bFind) {
int32_t iCharWidth = tc->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;
if (iGapChars > 0 && (m_iAlignment == CFX_RTFLineAlignment::Distributed ||
(m_iAlignment == CFX_RTFLineAlignment::Justified &&
dwStatus != CFX_BreakType::Paragraph))) {
int32_t iStart = -1;
for (const auto& tpo : tpos) {
CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index];
if (iStart < 0)
iStart = ttp.m_iStartPos;
else
ttp.m_iStartPos = iStart;
for (int32_t j = 0; j < ttp.m_iChars; ++j) {
CFX_Char* tc = ttp.GetChar(j);
if (tc->m_nBreakType != FX_LBT_DIRECT_BRK || tc->m_iCharWidth < 0)
continue;
int32_t k = iOffset / iGapChars;
tc->m_iCharWidth += k;
ttp.m_iWidth += k;
iOffset -= k;
--iGapChars;
if (iGapChars < 1)
break;
}
iStart += ttp.m_iWidth;
}
} else if (m_iAlignment == CFX_RTFLineAlignment::Right ||
m_iAlignment == CFX_RTFLineAlignment::Center) {
if (m_iAlignment == CFX_RTFLineAlignment::Center)
iOffset /= 2;
if (iOffset > 0) {
for (auto& ttp : m_pCurLine->m_LinePieces)
ttp.m_iStartPos += iOffset;
}
}
}
int32_t CFX_RTFBreak::GetBreakPos(std::vector<CFX_Char>& tca,
bool bAllChars,
bool bOnlyBrk,
int32_t* pEndPos) {
int32_t iLength = pdfium::CollectionSize<int32_t>(tca) - 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 (*pEndPos <= m_iLineWidth) {
if (!bAllChars)
return iLength;
iBreak = iLength;
iBreakPos = *pEndPos;
}
CFX_Char* pCharArray = tca.data();
CFX_Char* pCur = pCharArray + iLength;
--iLength;
if (bAllChars)
pCur->m_nBreakType = FX_LBT_UNKNOWN;
uint32_t nCodeProp = pCur->char_props();
uint32_t nNext = nCodeProp & 0x003F;
int32_t iCharWidth = pCur->m_iCharWidth;
if (iCharWidth > 0)
*pEndPos -= iCharWidth;
while (iLength >= 0) {
pCur = pCharArray + iLength;
nCodeProp = pCur->char_props();
uint32_t nCur = nCodeProp & 0x003F;
bool bNeedBreak = false;
FX_LINEBREAKTYPE eType;
if (nCur == kBreakPropertyTB) {
bNeedBreak = true;
eType = nNext == kBreakPropertyTB
? FX_LBT_PROHIBITED_BRK
: gs_FX_LineBreak_PairTable[nCur][nNext];
} else {
if (nCur == kBreakPropertySpace)
bNeedBreak = true;
eType = nNext == kBreakPropertySpace
? FX_LBT_PROHIBITED_BRK
: gs_FX_LineBreak_PairTable[nCur][nNext];
}
if (bAllChars)
pCur->m_nBreakType = eType;
if (!bOnlyBrk) {
iCharWidth = pCur->m_iCharWidth;
if (*pEndPos <= m_iLineWidth || bNeedBreak) {
if (eType == FX_LBT_DIRECT_BRK && iBreak < 0) {
iBreak = iLength;
iBreakPos = *pEndPos;
if (!bAllChars)
return iLength;
} else if (eType == FX_LBT_INDIRECT_BRK && iIndirect < 0) {
iIndirect = iLength;
iIndirectPos = *pEndPos;
}
if (iLast < 0) {
iLast = iLength;
iLastPos = *pEndPos;
}
}
if (iCharWidth > 0)
*pEndPos -= iCharWidth;
}
nNext = nCodeProp & 0x003F;
--iLength;
}
if (bOnlyBrk)
return 0;
if (iBreak > -1) {
*pEndPos = iBreakPos;
return iBreak;
}
if (iIndirect > -1) {
*pEndPos = iIndirectPos;
return iIndirect;
}
if (iLast > -1) {
*pEndPos = iLastPos;
return iLast;
}
return 0;
}
void CFX_RTFBreak::SplitTextLine(CFX_BreakLine* pCurLine,
CFX_BreakLine* pNextLine,
bool bAllChars) {
ASSERT(pCurLine && pNextLine);
if (pCurLine->m_LineChars.size() < 2)
return;
int32_t iEndPos = pCurLine->GetLineEnd();
std::vector<CFX_Char>& curChars = pCurLine->m_LineChars;
int32_t iCharPos = GetBreakPos(curChars, bAllChars, false, &iEndPos);
if (iCharPos < 0)
iCharPos = 0;
++iCharPos;
if (iCharPos >= pdfium::CollectionSize<int32_t>(pCurLine->m_LineChars)) {
pNextLine->Clear();
curChars[iCharPos - 1].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());
pNextLine->m_iStart = pCurLine->m_iStart;
pNextLine->m_iWidth = pCurLine->GetLineEnd() - iEndPos;
pCurLine->m_iWidth = iEndPos;
curChars[iCharPos - 1].m_nBreakType = FX_LBT_UNKNOWN;
for (size_t i = 0; i < pNextLine->m_LineChars.size(); ++i) {
if (pNextLine->m_LineChars[i].GetCharType() >= FX_CHARTYPE_ArabicAlef) {
pCurLine->m_iArabicChars--;
pNextLine->m_iArabicChars++;
}
pNextLine->m_LineChars[i].m_dwStatus = CFX_BreakType::None;
}
}
int32_t CFX_RTFBreak::GetDisplayPos(const FX_RTFTEXTOBJ* pText,
FXTEXT_CHARPOS* pCharPos,
bool bCharCode) const {
if (!pText || pText->iLength < 1)
return 0;
ASSERT(pText->pFont && pText->pRect);
RetainPtr<CFGAS_GEFont> pFont = pText->pFont;
CFX_RectF rtText(*pText->pRect);
bool bRTLPiece = FX_IsOdd(pText->iBidiLevel);
float fFontSize = pText->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 * static_cast<float>(iAscent) /
static_cast<float>(iMaxHeight);
wchar_t wPrev = 0xFEFF;
wchar_t wNext;
float fX = rtText.left;
int32_t iHorScale = pText->iHorizontalScale;
int32_t iVerScale = pText->iVerticalScale;
if (bRTLPiece)
fX = rtText.right();
float fY = rtText.top + fAscent;
int32_t iCount = 0;
for (int32_t i = 0; i < pText->iLength; ++i) {
wchar_t wch = pText->pStr[i];
int32_t iWidth = pText->pWidths[i];
uint32_t dwProps = FX_GetUnicodeProperties(wch);
uint32_t dwCharType = (dwProps & FX_CHARTYPEBITSMASK);
if (iWidth == 0) {
if (dwCharType == FX_CHARTYPE_ArabicAlef)
wPrev = 0xFEFF;
continue;
}
uint32_t iCharWidth = abs(iWidth);
bool bEmptyChar =
(dwCharType >= FX_CHARTYPE_Tab && dwCharType <= FX_CHARTYPE_Control);
if (!bEmptyChar)
++iCount;
if (pCharPos) {
iCharWidth /= iFontSize;
wchar_t wForm = wch;
if (dwCharType >= FX_CHARTYPE_ArabicAlef) {
if (i + 1 < pText->iLength) {
wNext = pText->pStr[i + 1];
if (pText->pWidths[i + 1] < 0 && i + 2 < pText->iLength)
wNext = pText->pStr[i + 2];
} else {
wNext = 0xFEFF;
}
wForm = pdfium::arabic::GetFormChar(wch, wPrev, wNext);
} else if (bRTLPiece) {
wForm = FX_GetMirrorChar(wch, dwProps);
}
if (!bEmptyChar) {
if (bCharCode) {
pCharPos->m_GlyphIndex = wch;
} else {
pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wForm);
if (pCharPos->m_GlyphIndex == 0xFFFF)
pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wch);
}
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
pCharPos->m_ExtGID = pCharPos->m_GlyphIndex;
#endif
pCharPos->m_FontCharWidth = iCharWidth;
}
float fCharWidth = fFontSize * iCharWidth / 1000.0f;
if (bRTLPiece && dwCharType != FX_CHARTYPE_Combination)
fX -= fCharWidth;
if (!bEmptyChar)
pCharPos->m_Origin = CFX_PointF(fX, fY);
if (!bRTLPiece && dwCharType != FX_CHARTYPE_Combination)
fX += fCharWidth;
if (!bEmptyChar) {
pCharPos->m_bGlyphAdjust = true;
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 * iVerScale / 100.0f;
pCharPos->m_Origin.y -= 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 = wch;
}
return iCount;
}
FX_RTFTEXTOBJ::FX_RTFTEXTOBJ()
: pFont(nullptr),
pRect(nullptr),
wLineBreakChar(L'\n'),
fFontSize(12.0f),
iLength(0),
iBidiLevel(0),
iHorizontalScale(100),
iVerticalScale(100) {}
FX_RTFTEXTOBJ::~FX_RTFTEXTOBJ() {}