diff options
Diffstat (limited to 'xfa/fgas/layout/cfx_rtfbreak.cpp')
| -rw-r--r-- | xfa/fgas/layout/cfx_rtfbreak.cpp | 790 |
1 files changed, 790 insertions, 0 deletions
diff --git a/xfa/fgas/layout/cfx_rtfbreak.cpp b/xfa/fgas/layout/cfx_rtfbreak.cpp new file mode 100644 index 0000000000..9acc082d8e --- /dev/null +++ b/xfa/fgas/layout/cfx_rtfbreak.cpp @@ -0,0 +1,790 @@ +// 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 "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), + m_pUserData(nullptr) { + SetBreakStatus(); + m_bPagination = !!(m_dwLayoutStyles & FX_LAYOUTSTYLE_Pagination); +} + +CFX_RTFBreak::~CFX_RTFBreak() {} + +void CFX_RTFBreak::SetLineStartPos(float fLinePos) { + int32_t iLinePos = FXSYS_round(fLinePos * 20000.0f); + 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 * 20000.0f) + 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 CFX_RetainPtr<CFX_Retainable>& 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 = 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_dwStatus = CFX_BreakType::None; + pCurChar->m_wCharCode = wch; + pCurChar->m_dwCharProps = dwProps; + pCurChar->m_iFontSize = m_iFontSize; + pCurChar->m_iHorizontalScale = m_iHorizontalScale; + pCurChar->m_iVerticalScale = m_iVerticalScale; + pCurChar->m_iCharWidth = 0; + 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); + 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; + } + + m_eCharType = chartype; + return std::max(dwRet1, dwRet2); +} + +void CFX_RTFBreak::AppendChar_Combination(CFX_Char* pCurChar) { + int32_t iCharWidth = 0; + if (!m_pFont->GetCharWidth(pCurChar->m_wCharCode, iCharWidth, false)) + iCharWidth = 0; + + iCharWidth *= m_iFontSize; + iCharWidth = iCharWidth * m_iHorizontalScale / 100; + CFX_Char* pLastChar = GetLastChar(0, false, true); + if (pLastChar && pLastChar->GetCharType() > FX_CHARTYPE_Combination) + iCharWidth = -iCharWidth; + else + m_eCharType = FX_CHARTYPE_Combination; + + pCurChar->m_iCharWidth = iCharWidth; + if (iCharWidth > 0) + m_pCurLine->m_iWidth += iCharWidth; +} + +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; + if (GetPositionedTab(&iCharWidth)) + iCharWidth -= iLineWidth; + else + iCharWidth = m_iTabWidth * (iLineWidth / m_iTabWidth + 1) - iLineWidth; + + pCurChar->m_iCharWidth = iCharWidth; + iLineWidth += iCharWidth; +} + +CFX_BreakType CFX_RTFBreak::AppendChar_Control(CFX_Char* pCurChar) { + CFX_BreakType dwRet2 = CFX_BreakType::None; + switch (pCurChar->m_wCharCode) { + 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->m_wCharCode == 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; + int32_t iCharWidth = 0; + 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); + if (!m_pFont->GetCharWidth(wForm, iCharWidth, false) && + !m_pFont->GetCharWidth(pLastChar->m_wCharCode, iCharWidth, false)) { + iCharWidth = m_iDefChar; + } + + iCharWidth *= m_iFontSize; + iCharWidth = iCharWidth * m_iHorizontalScale / 100; + pLastChar->m_iCharWidth = iCharWidth; + m_pCurLine->m_iWidth += iCharWidth; + iCharWidth = 0; + } + } + + wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar, + nullptr); + if (!m_pFont->GetCharWidth(wForm, iCharWidth, false) && + !m_pFont->GetCharWidth(pCurChar->m_wCharCode, iCharWidth, false)) { + iCharWidth = m_iDefChar; + } + + iCharWidth *= m_iFontSize; + iCharWidth = iCharWidth * m_iHorizontalScale / 100; + pCurChar->m_iCharWidth = iCharWidth; + m_pCurLine->m_iWidth += iCharWidth; + 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->m_wCharCode; + int32_t iCharWidth = 0; + if (!m_pFont->GetCharWidth(wForm, iCharWidth, false)) + iCharWidth = m_iDefChar; + + iCharWidth *= m_iFontSize; + iCharWidth *= m_iHorizontalScale / 100; + iCharWidth += m_iCharSpace; + + pCurChar->m_iCharWidth = iCharWidth; + m_pCurLine->m_iWidth += iCharWidth; + 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; + } + + int32_t iCount = m_pCurLine->CountChars(); + if (iCount < 1) + return CFX_BreakType::None; + + CFX_Char* tc = m_pCurLine->GetChar(iCount - 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->CountChars() - 1); + switch (tc->GetCharType()) { + case FX_CHARTYPE_Tab: + case FX_CHARTYPE_Control: + case FX_CHARTYPE_Space: + break; + default: + SplitTextLine(m_pCurLine, pNextLine, !m_bPagination && bAllChars); + bDone = true; + break; + } + } + + if (!m_bPagination) { + if (bAllChars && !bDone) { + int32_t endPos = m_pCurLine->GetLineEnd(); + GetBreakPos(m_pCurLine->m_LineChars, endPos, bAllChars, true); + } + 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 = m_pCurLine->CountChars() - 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->m_iHorizontalScale; + tp.m_iVerticalScale = pTC->m_iVerticalScale; + dwIdentity = pTC->m_dwIdentity; + tp.m_dwIdentity = dwIdentity; + tp.m_pUserData = pTC->m_pUserData; + 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; + int32_t iCount = m_pCurLine->CountChars(); + if (!m_bPagination && m_pCurLine->m_iArabicChars > 0) { + int32_t iBidiNum = 0; + for (int32_t 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); + } else { + for (int32_t i = 0; i < iCount; ++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; + 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->m_iHorizontalScale; + tp.m_iVerticalScale = pTC->m_iVerticalScale; + dwIdentity = pTC->m_dwIdentity; + tp.m_dwIdentity = dwIdentity; + tp.m_pUserData = pTC->m_pUserData; + 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, + int32_t& iEndPos, + bool bAllChars, + bool bOnlyBrk) { + 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 (iEndPos <= m_iLineWidth) { + if (!bAllChars) + return iLength; + + iBreak = iLength; + iBreakPos = iEndPos; + } + + CFX_Char* pCharArray = tca.data(); + CFX_Char* pCur = pCharArray + iLength; + --iLength; + if (bAllChars) + pCur->m_nBreakType = FX_LBT_UNKNOWN; + + uint32_t nCodeProp = pCur->m_dwCharProps; + uint32_t nNext = nCodeProp & 0x003F; + int32_t iCharWidth = pCur->m_iCharWidth; + if (iCharWidth > 0) + iEndPos -= iCharWidth; + + while (iLength >= 0) { + pCur = pCharArray + iLength; + nCodeProp = pCur->m_dwCharProps; + uint32_t nCur = nCodeProp & 0x003F; + bool bNeedBreak = false; + FX_LINEBREAKTYPE eType; + if (nCur == FX_CBP_TB) { + bNeedBreak = true; + eType = nNext == FX_CBP_TB ? FX_LBT_PROHIBITED_BRK + : gs_FX_LineBreak_PairTable[nCur][nNext]; + } else { + if (nCur == FX_CBP_SP) + bNeedBreak = true; + + eType = nNext == FX_CBP_SP ? FX_LBT_PROHIBITED_BRK + : gs_FX_LineBreak_PairTable[nCur][nNext]; + } + if (bAllChars) + pCur->m_nBreakType = eType; + + if (!bOnlyBrk) { + iCharWidth = pCur->m_iCharWidth; + if (iEndPos <= m_iLineWidth || bNeedBreak) { + 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; + } + } + 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_RTFBreak::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->GetLineEnd(); + 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(); + 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); + + CFX_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; + } + + int32_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, bRTLPiece, false); + } + dwProps = FX_GetUnicodeProperties(wForm); + + if (!bEmptyChar) { + if (bCharCode) { + pCharPos->m_GlyphIndex = wch; + } else { + pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wForm, false); + if (pCharPos->m_GlyphIndex == 0xFFFF) + pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wch, false); + } +#if _FXM_PLATFORM_ == _FXM_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() {} |