| // 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, 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->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, 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->char_code(); |
| 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(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; |
| 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->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 == 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) 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; |
| 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 (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, 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 = pFont->GetGlyphIndex(wForm, false); |
| #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ |
| pCharPos->m_ExtGID = pCharPos->m_GlyphIndex; |
| #endif |
| pCharPos->m_FontCharWidth = iCharWidth; |
| } |
| |
| 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; |
| } |
| } |
| } |
| } |
| 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; |
| 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; |
| 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, 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() |
| : 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; |
