diff options
Diffstat (limited to 'xfa/fgas/layout/cfx_txtbreak.cpp')
| -rw-r--r-- | xfa/fgas/layout/cfx_txtbreak.cpp | 1027 |
1 files changed, 1027 insertions, 0 deletions
diff --git a/xfa/fgas/layout/cfx_txtbreak.cpp b/xfa/fgas/layout/cfx_txtbreak.cpp new file mode 100644 index 0000000000..e898a22991 --- /dev/null +++ b/xfa/fgas/layout/cfx_txtbreak.cpp @@ -0,0 +1,1027 @@ +// 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_memory.h" +#include "third_party/base/ptr_util.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_PageLoad(CFX_Char* pCurChar, uint32_t dwProps) { + pCurChar->m_dwStatus = CFX_BreakType::None; + pCurChar->m_dwCharStyles = m_iAlignment | (1 << 8); +} + +void CFX_TxtBreak::AppendChar_Combination(CFX_Char* pCurChar) { + wchar_t wch = pCurChar->m_wCharCode; + 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->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_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->m_wCharCode; + 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, false); + + 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, false); + + 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->m_wCharCode; + wchar_t wForm = wch; + + if (m_bCombText) { + iCharWidth = m_iCombWidth; + } else { + if (!m_pFont->GetCharWidth(wForm, iCharWidth, false)) + 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 = kTextLayoutCodeProperties[static_cast<uint16_t>(wch)]; + FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps); + m_pCurLine->m_LineChars.emplace_back(); + + CFX_Char* pCurChar = &m_pCurLine->m_LineChars.back(); + pCurChar->m_wCharCode = static_cast<uint16_t>(wch); + pCurChar->m_dwCharProps = dwProps; + pCurChar->m_dwCharStyles = 0; + pCurChar->m_iCharWidth = 0; + pCurChar->m_iHorizontalScale = m_iHorizontalScale; + pCurChar->m_iVerticalScale = m_iVerticalScale; + pCurChar->m_dwStatus = CFX_BreakType::None; + pCurChar->m_iBidiClass = 0; + pCurChar->m_iBidiLevel = 0; + pCurChar->m_iBidiPos = 0; + pCurChar->m_iBidiOrder = 0; + + AppendChar_PageLoad(pCurChar, dwProps); + 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; + 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; + int32_t i; + int32_t j; + std::vector<CFX_Char>& chars = m_pCurLine->m_LineChars; + int32_t iCount = m_pCurLine->CountChars(); + bool bDone = m_pCurLine->m_iArabicChars > 0; + if (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); + } + + 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; + 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_iHorizontalScale = pTC->m_iHorizontalScale; + tp.m_iVerticalScale = pTC->m_iVerticalScale; + 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->m_iHorizontalScale; + tp.m_iVerticalScale = pTC->m_iVerticalScale; + 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->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 = FX_LBT_PROHIBITED_BRK; + else + eType = gs_FX_LineBreak_PairTable[nCur][nNext]; + } 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) { + 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, + bool bCharCode, + CFX_WideString* pWSForms) const { + if (!pTxtRun || pTxtRun->iLength < 1) + return 0; + + CFDE_TxtEdtPage* pAccess = pTxtRun->pAccess; + const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity; + const wchar_t* 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; + 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; + float fCharHeight; + 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 (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; + } else if (wch == L'.') { + wForm = wch; + } else if (wch == L',') { + wForm = wch; + } else if (bRTLPiece) { + wForm = FX_GetMirrorChar(wch, dwProps, bRTLPiece, false); + } 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, 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 = (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 = + 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 = 1000; + + fCharWidth = fFontSize * iCharWidth / 1000.0f; + fCharHeight = fFontSize * iCharHeight / 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, false); + 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, false)) { + 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, false)) + pCharPos->m_Origin.y -= fFontSize * rtBox.height / iMaxHeight; + } + } + } + CFX_PointF ptOffset; + pCharPos->m_Origin.x += ptOffset.x; + pCharPos->m_Origin.y -= ptOffset.y; + } + 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_TxtEdtPage* pAccess = pTxtRun->pAccess; + const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity; + 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; + CFX_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; + wchar_t wLineBreakChar = pTxtRun->wLineBreakChar; + 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 (pAccess) { + wch = pAccess->GetChar(pIdentity, i); + iCharSize = pAccess->GetWidth(pIdentity, 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 || + (wLineBreakChar != 0xFEFF && wch == wLineBreakChar))) { + 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, false); + 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() + : pAccess(nullptr), + pIdentity(nullptr), + pWidths(nullptr), + iLength(0), + pFont(nullptr), + fFontSize(12), + dwStyles(0), + iHorizontalScale(100), + iVerticalScale(100), + dwCharStyles(0), + pRect(nullptr), + wLineBreakChar(L'\n'), + bSkipSpace(true) {} + +FX_TXTRUN::~FX_TXTRUN() {} + +FX_TXTRUN::FX_TXTRUN(const FX_TXTRUN& other) = default; 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