| // 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/cfgas_txtbreak.h" |
| |
| #include <algorithm> |
| |
| #include "build/build_config.h" |
| #include "core/fxcrt/fx_extension.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxge/text_char_pos.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/containers/adapters.h" |
| #include "third_party/base/stl_util.h" |
| #include "xfa/fgas/font/cfgas_gefont.h" |
| #include "xfa/fgas/layout/cfgas_char.h" |
| #include "xfa/fgas/layout/fx_arabic.h" |
| #include "xfa/fgas/layout/fx_linebreak.h" |
| |
| namespace { |
| |
| bool IsCtrlCode(wchar_t wch) { |
| FX_CHARTYPE dwRet = FX_GetCharType(wch); |
| return dwRet == FX_CHARTYPE::kTab || dwRet == FX_CHARTYPE::kControl; |
| } |
| |
| } // namespace |
| |
| CFGAS_TxtBreak::CFGAS_TxtBreak() : CFGAS_Break(FX_LAYOUTSTYLE_None) {} |
| |
| CFGAS_TxtBreak::~CFGAS_TxtBreak() = default; |
| |
| void CFGAS_TxtBreak::SetLineWidth(float fLineWidth) { |
| m_iLineWidth = FXSYS_roundf(fLineWidth * kConversionFactor); |
| DCHECK(m_iLineWidth >= 20000); |
| } |
| |
| void CFGAS_TxtBreak::SetAlignment(int32_t iAlignment) { |
| DCHECK(iAlignment >= CFX_TxtLineAlignment_Left); |
| DCHECK(iAlignment <= CFX_TxtLineAlignment_Justified); |
| m_iAlignment = iAlignment; |
| } |
| |
| void CFGAS_TxtBreak::SetCombWidth(float fCombWidth) { |
| m_iCombWidth = FXSYS_roundf(fCombWidth * kConversionFactor); |
| } |
| |
| void CFGAS_TxtBreak::AppendChar_Combination(CFGAS_Char* pCurChar) { |
| wchar_t wch = pCurChar->char_code(); |
| wchar_t wForm; |
| FX_SAFE_INT32 iCharWidth = 0; |
| pCurChar->m_iCharWidth = -1; |
| if (m_bCombText) { |
| iCharWidth = m_iCombWidth; |
| } else { |
| wForm = wch; |
| CFGAS_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; |
| } |
| } |
| int32_t iCharWidthOut; |
| if (m_pFont && m_pFont->GetCharWidth(wForm, &iCharWidthOut)) |
| iCharWidth = iCharWidthOut; |
| else |
| iCharWidth = 0; |
| |
| iCharWidth *= m_iFontSize; |
| iCharWidth *= m_iHorizontalScale; |
| iCharWidth /= 100; |
| } |
| |
| iCharWidth *= -1; |
| pCurChar->m_iCharWidth = iCharWidth.ValueOrDefault(0); |
| } |
| |
| void CFGAS_TxtBreak::AppendChar_Tab(CFGAS_Char* pCurChar) { |
| m_eCharType = FX_CHARTYPE::kTab; |
| } |
| |
| CFGAS_Char::BreakType CFGAS_TxtBreak::AppendChar_Control(CFGAS_Char* pCurChar) { |
| m_eCharType = FX_CHARTYPE::kControl; |
| CFGAS_Char::BreakType dwRet = CFGAS_Char::BreakType::kNone; |
| if (!m_bSingleLine) { |
| wchar_t wch = pCurChar->char_code(); |
| switch (wch) { |
| case L'\v': |
| case 0x2028: |
| dwRet = CFGAS_Char::BreakType::kLine; |
| break; |
| case L'\f': |
| dwRet = CFGAS_Char::BreakType::kPage; |
| break; |
| case 0x2029: |
| dwRet = CFGAS_Char::BreakType::kParagraph; |
| break; |
| default: |
| if (wch == m_wParagraphBreakChar) |
| dwRet = CFGAS_Char::BreakType::kParagraph; |
| break; |
| } |
| if (dwRet != CFGAS_Char::BreakType::kNone) |
| dwRet = EndBreak(dwRet); |
| } |
| return dwRet; |
| } |
| |
| CFGAS_Char::BreakType CFGAS_TxtBreak::AppendChar_Arabic(CFGAS_Char* pCurChar) { |
| FX_CHARTYPE chartype = pCurChar->GetCharType(); |
| int32_t& iLineWidth = m_pCurLine->m_iWidth; |
| wchar_t wForm; |
| CFGAS_Char* pLastChar = nullptr; |
| bool bAlef = false; |
| if (!m_bCombText && m_eCharType >= FX_CHARTYPE::kArabicAlef && |
| m_eCharType <= FX_CHARTYPE::kArabicDistortion) { |
| FX_SAFE_INT32 iCharWidth = 0; |
| pLastChar = GetLastChar(1, true, false); |
| if (pLastChar) { |
| if (pLastChar->m_iCharWidth > 0) |
| iLineWidth -= pLastChar->m_iCharWidth; |
| iCharWidth = pLastChar->m_iCharWidth; |
| |
| CFGAS_Char* pPrevChar = GetLastChar(2, true, false); |
| wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar); |
| bAlef = (wForm == 0xFEFF && |
| pLastChar->GetCharType() == FX_CHARTYPE::kArabicAlef); |
| if (m_pFont) { |
| int32_t iCharWidthOut = 0; |
| m_pFont->GetCharWidth(wForm, &iCharWidthOut); |
| iCharWidth = iCharWidthOut; |
| } |
| if (wForm == 0xFEFF) |
| iCharWidth = 0; |
| |
| iCharWidth *= m_iFontSize; |
| iCharWidth *= m_iHorizontalScale; |
| iCharWidth /= 100; |
| |
| int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0); |
| pLastChar->m_iCharWidth = iCharWidthValid; |
| iLineWidth += iCharWidthValid; |
| } |
| } |
| |
| m_eCharType = chartype; |
| wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar, |
| nullptr); |
| FX_SAFE_INT32 iCharWidth = 0; |
| if (m_bCombText) { |
| iCharWidth = m_iCombWidth; |
| } else { |
| if (m_pFont) { |
| int32_t iCharWidthOut = 0; |
| m_pFont->GetCharWidth(wForm, &iCharWidthOut); |
| iCharWidth = iCharWidthOut; |
| } |
| if (wForm == 0xFEFF) |
| iCharWidth = 0; |
| |
| iCharWidth *= m_iFontSize; |
| iCharWidth *= m_iHorizontalScale; |
| iCharWidth /= 100; |
| } |
| |
| int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0); |
| pCurChar->m_iCharWidth = iCharWidthValid; |
| iLineWidth += iCharWidthValid; |
| |
| m_pCurLine->IncrementArabicCharCount(); |
| if (!m_bSingleLine && IsGreaterThanLineWidth(iLineWidth)) |
| return EndBreak(CFGAS_Char::BreakType::kLine); |
| return CFGAS_Char::BreakType::kNone; |
| } |
| |
| CFGAS_Char::BreakType CFGAS_TxtBreak::AppendChar_Others(CFGAS_Char* pCurChar) { |
| FX_CHARTYPE chartype = pCurChar->GetCharType(); |
| int32_t& iLineWidth = m_pCurLine->m_iWidth; |
| FX_SAFE_INT32 iCharWidth = 0; |
| m_eCharType = chartype; |
| wchar_t wch = pCurChar->char_code(); |
| wchar_t wForm = wch; |
| |
| if (m_bCombText) { |
| iCharWidth = m_iCombWidth; |
| } else { |
| int32_t iCharWidthOut; |
| if (m_pFont && m_pFont->GetCharWidth(wForm, &iCharWidthOut)) |
| iCharWidth = iCharWidthOut; |
| else |
| iCharWidth = 0; |
| |
| iCharWidth *= m_iFontSize; |
| iCharWidth *= m_iHorizontalScale; |
| iCharWidth /= 100; |
| } |
| |
| iCharWidth += m_iCharSpace; |
| |
| int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0); |
| pCurChar->m_iCharWidth = iCharWidthValid; |
| iLineWidth += iCharWidthValid; |
| if (!m_bSingleLine && chartype != FX_CHARTYPE::kSpace && |
| IsGreaterThanLineWidth(iLineWidth)) { |
| return EndBreak(CFGAS_Char::BreakType::kLine); |
| } |
| |
| return CFGAS_Char::BreakType::kNone; |
| } |
| |
| CFGAS_Char::BreakType CFGAS_TxtBreak::AppendChar(wchar_t wch) { |
| FX_CHARTYPE chartype = FX_GetCharType(wch); |
| m_pCurLine->m_LineChars.emplace_back(wch, m_iHorizontalScale, |
| m_iVerticalScale); |
| CFGAS_Char* pCurChar = &m_pCurLine->m_LineChars.back(); |
| pCurChar->m_dwCharStyles = m_iAlignment | (1 << 8); |
| |
| CFGAS_Char::BreakType dwRet1 = CFGAS_Char::BreakType::kNone; |
| if (chartype != FX_CHARTYPE::kCombination && |
| GetUnifiedCharType(m_eCharType) != GetUnifiedCharType(chartype) && |
| m_eCharType != FX_CHARTYPE::kUnknown && !m_bSingleLine && |
| IsGreaterThanLineWidth(m_pCurLine->m_iWidth) && |
| (m_eCharType != FX_CHARTYPE::kSpace || |
| chartype != FX_CHARTYPE::kControl)) { |
| dwRet1 = EndBreak(CFGAS_Char::BreakType::kLine); |
| if (!m_pCurLine->m_LineChars.empty()) |
| pCurChar = &m_pCurLine->m_LineChars.back(); |
| } |
| |
| CFGAS_Char::BreakType dwRet2 = CFGAS_Char::BreakType::kNone; |
| 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 = CFGAS_Char::BreakType::kParagraph; |
| EndBreak(dwRet2); |
| } else { |
| switch (chartype) { |
| case FX_CHARTYPE::kTab: |
| AppendChar_Tab(pCurChar); |
| break; |
| case FX_CHARTYPE::kControl: |
| dwRet2 = AppendChar_Control(pCurChar); |
| break; |
| case FX_CHARTYPE::kCombination: |
| AppendChar_Combination(pCurChar); |
| break; |
| case FX_CHARTYPE::kArabicAlef: |
| case FX_CHARTYPE::kArabicSpecial: |
| case FX_CHARTYPE::kArabicDistortion: |
| case FX_CHARTYPE::kArabicNormal: |
| case FX_CHARTYPE::kArabicForm: |
| case FX_CHARTYPE::kArabic: |
| dwRet2 = AppendChar_Arabic(pCurChar); |
| break; |
| case FX_CHARTYPE::kUnknown: |
| case FX_CHARTYPE::kSpace: |
| case FX_CHARTYPE::kNumeric: |
| case FX_CHARTYPE::kNormal: |
| default: |
| dwRet2 = AppendChar_Others(pCurChar); |
| break; |
| } |
| } |
| return std::max(dwRet1, dwRet2); |
| } |
| |
| void CFGAS_TxtBreak::EndBreak_SplitLine(CFGAS_BreakLine* pNextLine, |
| bool bAllChars) { |
| bool bDone = false; |
| CFGAS_Char* pTC; |
| if (!m_bSingleLine && IsGreaterThanLineWidth(m_pCurLine->m_iWidth)) { |
| pTC = m_pCurLine->GetChar(m_pCurLine->m_LineChars.size() - 1); |
| switch (pTC->GetCharType()) { |
| case FX_CHARTYPE::kTab: |
| case FX_CHARTYPE::kControl: |
| case FX_CHARTYPE::kSpace: |
| break; |
| default: |
| SplitTextLine(m_pCurLine.Get(), pNextLine, bAllChars); |
| bDone = true; |
| break; |
| } |
| } |
| if (bAllChars && !bDone) { |
| int32_t iEndPos = m_pCurLine->m_iWidth; |
| GetBreakPos(&m_pCurLine->m_LineChars, bAllChars, true, &iEndPos); |
| } |
| } |
| |
| void CFGAS_TxtBreak::EndBreak_BidiLine(std::deque<FX_TPO>* tpos, |
| CFGAS_Char::BreakType dwStatus) { |
| CFGAS_BreakPiece tp; |
| FX_TPO tpo; |
| CFGAS_Char* pTC; |
| std::vector<CFGAS_Char>& chars = m_pCurLine->m_LineChars; |
| if (!m_pCurLine->HasArabicChar()) { |
| tp.m_dwStatus = dwStatus; |
| tp.m_iStartPos = m_pCurLine->m_iStart; |
| tp.m_iWidth = m_pCurLine->m_iWidth; |
| tp.m_iStartChar = 0; |
| tp.m_iCharCount = m_pCurLine->m_LineChars.size(); |
| 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}); |
| return; |
| } |
| |
| 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::kControl) |
| iBidiNum = i; |
| if (i == 0) |
| pTC->m_iBidiLevel = 1; |
| } |
| CFGAS_Char::BidiLine(&chars, iBidiNum + 1); |
| |
| tp.m_dwStatus = CFGAS_Char::BreakType::kPiece; |
| tp.m_iStartPos = m_pCurLine->m_iStart; |
| tp.m_pChars = &m_pCurLine->m_LineChars; |
| int32_t iBidiLevel = -1; |
| int32_t iCharWidth; |
| int32_t i = 0; |
| int32_t j = -1; |
| int32_t iCount = pdfium::CollectionSize<int32_t>(m_pCurLine->m_LineChars); |
| 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 = CFGAS_Char::BreakType::kPiece; |
| } |
| if (iBidiLevel != pTC->m_iBidiLevel || |
| pTC->m_dwStatus != CFGAS_Char::BreakType::kNone) { |
| 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_iCharCount = 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_iCharCount = 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]; |
| CFGAS_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index]; |
| ttp.m_iStartPos = iStartPos; |
| iStartPos += ttp.m_iWidth; |
| } |
| } |
| m_pCurLine->m_LinePieces[j].m_dwStatus = dwStatus; |
| } |
| } |
| |
| void CFGAS_TxtBreak::EndBreak_Alignment(const std::deque<FX_TPO>& tpos, |
| bool bAllChars, |
| CFGAS_Char::BreakType dwStatus) { |
| int32_t iNetWidth = m_pCurLine->m_iWidth; |
| int32_t iGapChars = 0; |
| bool bFind = false; |
| for (const FX_TPO& pos : pdfium::base::Reversed(tpos)) { |
| const CFGAS_BreakPiece& ttp = m_pCurLine->m_LinePieces[pos.index]; |
| if (!bFind) |
| iNetWidth = ttp.GetEndPos(); |
| |
| bool bArabic = FX_IsOdd(ttp.m_iBidiLevel); |
| int32_t j = bArabic ? 0 : ttp.m_iCharCount - 1; |
| while (j > -1 && j < ttp.m_iCharCount) { |
| const CFGAS_Char* pTC = ttp.GetChar(j); |
| if (pTC->m_eLineBreakType == FX_LINEBREAKTYPE::kDIRECT_BRK) |
| iGapChars++; |
| if (!bFind || !bAllChars) { |
| FX_CHARTYPE chartype = pTC->GetCharType(); |
| if (chartype == FX_CHARTYPE::kSpace || |
| chartype == FX_CHARTYPE::kControl) { |
| 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 != CFGAS_Char::BreakType::kParagraph) { |
| int32_t iStart = -1; |
| for (auto& tpo : tpos) { |
| CFGAS_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_iCharCount && iGapChars > 0; |
| j++, iGapChars--) { |
| CFGAS_Char* pTC = ttp.GetChar(j); |
| if (pTC->m_eLineBreakType != FX_LINEBREAKTYPE::kDIRECT_BRK || |
| pTC->m_iCharWidth < 0) { |
| continue; |
| } |
| int32_t k = iOffset / iGapChars; |
| pTC->m_iCharWidth += k; |
| ttp.m_iWidth += k; |
| iOffset -= k; |
| } |
| 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; |
| } |
| } |
| } |
| |
| CFGAS_Char::BreakType CFGAS_TxtBreak::EndBreak(CFGAS_Char::BreakType dwStatus) { |
| DCHECK(dwStatus != CFGAS_Char::BreakType::kNone); |
| |
| if (!m_pCurLine->m_LinePieces.empty()) { |
| if (dwStatus != CFGAS_Char::BreakType::kPiece) |
| m_pCurLine->m_LinePieces.back().m_dwStatus = dwStatus; |
| return m_pCurLine->m_LinePieces.back().m_dwStatus; |
| } |
| |
| if (HasLine()) { |
| if (m_Lines[m_iReadyLineIndex].m_LinePieces.empty()) |
| return CFGAS_Char::BreakType::kNone; |
| |
| if (dwStatus != CFGAS_Char::BreakType::kPiece) |
| m_Lines[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus = dwStatus; |
| return m_Lines[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus; |
| } |
| |
| if (m_pCurLine->m_LineChars.empty()) |
| return CFGAS_Char::BreakType::kNone; |
| |
| m_pCurLine->m_LineChars.back().m_dwStatus = dwStatus; |
| if (dwStatus == CFGAS_Char::BreakType::kPiece) |
| return dwStatus; |
| |
| m_iReadyLineIndex = m_pCurLine == &m_Lines[0] ? 0 : 1; |
| CFGAS_BreakLine* pNextLine = &m_Lines[1 - m_iReadyLineIndex]; |
| bool bAllChars = m_iAlignment > CFX_TxtLineAlignment_Right; |
| 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; |
| CFGAS_Char* pTC = GetLastChar(0, false, false); |
| m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE::kUnknown; |
| |
| return dwStatus; |
| } |
| |
| int32_t CFGAS_TxtBreak::GetBreakPos(std::vector<CFGAS_Char>* pChars, |
| bool bAllChars, |
| bool bOnlyBrk, |
| int32_t* pEndPos) { |
| std::vector<CFGAS_Char>& chars = *pChars; |
| int32_t iLength = pdfium::CollectionSize<int32_t>(chars) - 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 || *pEndPos <= m_iLineWidth) { |
| if (!bAllChars) |
| return iLength; |
| |
| iBreak = iLength; |
| iBreakPos = *pEndPos; |
| } |
| |
| FX_LINEBREAKTYPE eType; |
| FX_BREAKPROPERTY nCur; |
| FX_BREAKPROPERTY nNext; |
| CFGAS_Char* pCur = &chars[iLength--]; |
| if (bAllChars) |
| pCur->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN; |
| |
| nNext = FX_GetBreakProperty(pCur->char_code()); |
| int32_t iCharWidth = pCur->m_iCharWidth; |
| if (iCharWidth > 0) |
| *pEndPos -= iCharWidth; |
| |
| while (iLength >= 0) { |
| pCur = &chars[iLength]; |
| nCur = FX_GetBreakProperty(pCur->char_code()); |
| if (nNext == FX_BREAKPROPERTY::kSP) |
| eType = FX_LINEBREAKTYPE::kPROHIBITED_BRK; |
| else |
| eType = GetLineBreakTypeFromPair(nCur, nNext); |
| if (bAllChars) |
| pCur->m_eLineBreakType = eType; |
| if (!bOnlyBrk) { |
| if (m_bSingleLine || *pEndPos <= m_iLineWidth || |
| nCur == FX_BREAKPROPERTY::kSP) { |
| if (eType == FX_LINEBREAKTYPE::kDIRECT_BRK && iBreak < 0) { |
| iBreak = iLength; |
| iBreakPos = *pEndPos; |
| if (!bAllChars) |
| return iLength; |
| } else if (eType == FX_LINEBREAKTYPE::kINDIRECT_BRK && iIndirect < 0) { |
| iIndirect = iLength; |
| iIndirectPos = *pEndPos; |
| } |
| if (iLast < 0) { |
| iLast = iLength; |
| iLastPos = *pEndPos; |
| } |
| } |
| iCharWidth = pCur->m_iCharWidth; |
| if (iCharWidth > 0) |
| *pEndPos -= iCharWidth; |
| } |
| nNext = nCur; |
| 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 CFGAS_TxtBreak::SplitTextLine(CFGAS_BreakLine* pCurLine, |
| CFGAS_BreakLine* pNextLine, |
| bool bAllChars) { |
| DCHECK(pCurLine); |
| DCHECK(pNextLine); |
| |
| if (pCurLine->m_LineChars.size() < 2) |
| return; |
| |
| int32_t iEndPos = pCurLine->m_iWidth; |
| std::vector<CFGAS_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(); |
| CFGAS_Char* pTC = &curChars[iCharPos - 1]; |
| pTC->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN; |
| return; |
| } |
| |
| pNextLine->m_LineChars = |
| std::vector<CFGAS_Char>(curChars.begin() + iCharPos, curChars.end()); |
| curChars.erase(curChars.begin() + iCharPos, curChars.end()); |
| pCurLine->m_iWidth = iEndPos; |
| CFGAS_Char* pTC = &curChars[iCharPos - 1]; |
| pTC->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN; |
| int32_t iWidth = 0; |
| for (size_t i = 0; i < pNextLine->m_LineChars.size(); ++i) { |
| if (pNextLine->m_LineChars[i].GetCharType() >= FX_CHARTYPE::kArabicAlef) { |
| pCurLine->DecrementArabicCharCount(); |
| pNextLine->IncrementArabicCharCount(); |
| } |
| iWidth += std::max(0, pNextLine->m_LineChars[i].m_iCharWidth); |
| pNextLine->m_LineChars[i].m_dwStatus = CFGAS_Char::BreakType::kNone; |
| } |
| pNextLine->m_iWidth = iWidth; |
| } |
| |
| struct FX_FORMCHAR { |
| uint16_t wch; |
| uint16_t wForm; |
| int32_t iWidth; |
| }; |
| |
| size_t CFGAS_TxtBreak::GetDisplayPos(const Run& run, |
| TextCharPos* pCharPos) const { |
| if (run.iLength < 1) |
| return 0; |
| |
| Engine* pEngine = run.pEdtEngine; |
| const wchar_t* pStr = run.wsStr.c_str(); |
| int32_t* pWidths = run.pWidths; |
| int32_t iLength = run.iLength - 1; |
| RetainPtr<CFGAS_GEFont> pFont = run.pFont; |
| uint32_t dwStyles = run.dwStyles; |
| CFX_RectF rtText(*run.pRect); |
| bool bRTLPiece = (run.dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0; |
| float fFontSize = run.fFontSize; |
| int32_t iFontSize = FXSYS_roundf(fFontSize * 20.0f); |
| int32_t iAscent = pFont->GetAscent(); |
| int32_t iDescent = pFont->GetDescent(); |
| int32_t iMaxHeight = iAscent - iDescent; |
| float fFontHeight = fFontSize; |
| float fAscent = fFontHeight * iAscent / iMaxHeight; |
| float fX = rtText.left; |
| float fY; |
| float fCharWidth; |
| int32_t iHorScale = run.iHorizontalScale; |
| int32_t iVerScale = run.iVerticalScale; |
| bool bSkipSpace = run.bSkipSpace; |
| FX_FORMCHAR formChars[3]; |
| float fYBase; |
| |
| if (bRTLPiece) |
| fX = rtText.right(); |
| |
| fYBase = rtText.top + (rtText.height - fFontSize) / 2.0f; |
| fY = fYBase + fAscent; |
| |
| size_t szCount = 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 iAbsolute = i + run.iStart; |
| int32_t iWidth; |
| wchar_t wch; |
| if (pEngine) { |
| wch = pEngine->GetChar(iAbsolute); |
| iWidth = pEngine->GetWidthOfChar(iAbsolute); |
| } else { |
| wch = *pStr++; |
| iWidth = *pWidths++; |
| } |
| |
| FX_CHARTYPE chartype = FX_GetCharType(wch); |
| if (chartype == FX_CHARTYPE::kArabicAlef && iWidth == 0) { |
| wPrev = 0xFEFF; |
| wLast = wch; |
| continue; |
| } |
| |
| if (chartype >= FX_CHARTYPE::kArabicAlef) { |
| if (i < iLength) { |
| if (pEngine) { |
| iNext = i + 1; |
| while (iNext <= iLength) { |
| int32_t iNextAbsolute = iNext + run.iStart; |
| wNext = pEngine->GetChar(iNextAbsolute); |
| if (FX_GetCharType(wNext) != FX_CHARTYPE::kCombination) |
| break; |
| |
| iNext++; |
| } |
| if (iNext > iLength) |
| wNext = 0xFEFF; |
| } else { |
| int32_t j = -1; |
| do { |
| j++; |
| if (i + j >= iLength) |
| break; |
| |
| wNext = pStr[j]; |
| } while (FX_GetCharType(wNext) == FX_CHARTYPE::kCombination); |
| 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::kCombination) { |
| wForm = wch; |
| if (wch >= 0x064C && wch <= 0x0651) { |
| if (bShadda) { |
| wForm = 0xFEFF; |
| bShadda = false; |
| } else { |
| wNext = 0xFEFF; |
| if (pEngine) { |
| iNext = i + 1; |
| if (iNext <= iLength) { |
| int32_t iNextAbsolute = iNext + run.iStart; |
| wNext = pEngine->GetChar(iNextAbsolute); |
| } |
| } 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::kNumeric) { |
| wForm = wch; |
| } else if (wch == L'.') { |
| wForm = wch; |
| } else if (wch == L',') { |
| wForm = wch; |
| } else if (bRTLPiece) { |
| wForm = FX_GetMirrorChar(wch); |
| } else { |
| wForm = wch; |
| } |
| if (chartype != FX_CHARTYPE::kCombination) |
| bShadda = false; |
| if (chartype < FX_CHARTYPE::kArabicAlef) |
| bLam = false; |
| |
| bool bEmptyChar = |
| (chartype >= FX_CHARTYPE::kTab && chartype <= FX_CHARTYPE::kControl); |
| if (wForm == 0xFEFF) |
| bEmptyChar = true; |
| |
| int32_t iForms = bLam ? 3 : 1; |
| szCount += (bEmptyChar && bSkipSpace) ? 0 : iForms; |
| if (!pCharPos) { |
| if (iWidth > 0) |
| wPrev = wch; |
| wLast = wch; |
| continue; |
| } |
| |
| int32_t iCharWidth = iWidth; |
| if (iCharWidth < 0) |
| iCharWidth = -iCharWidth; |
| |
| iCharWidth /= iFontSize; |
| formChars[0].wch = wch; |
| formChars[0].wForm = wForm; |
| formChars[0].iWidth = iCharWidth; |
| if (bLam) { |
| formChars[1].wForm = 0x0651; |
| iCharWidth = 0; |
| pFont->GetCharWidth(0x0651, &iCharWidth); |
| formChars[1].iWidth = iCharWidth; |
| formChars[2].wForm = 0x0670; |
| iCharWidth = 0; |
| pFont->GetCharWidth(0x0670, &iCharWidth); |
| formChars[2].iWidth = iCharWidth; |
| } |
| |
| for (int32_t j = 0; j < iForms; j++) { |
| wForm = (wchar_t)formChars[j].wForm; |
| iCharWidth = formChars[j].iWidth; |
| if (j > 0) { |
| chartype = FX_CHARTYPE::kCombination; |
| wch = wForm; |
| wLast = (wchar_t)formChars[j - 1].wForm; |
| } |
| if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) { |
| pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wForm); |
| #if defined(OS_APPLE) |
| pCharPos->m_ExtGID = pCharPos->m_GlyphIndex; |
| #endif |
| pCharPos->m_FontCharWidth = iCharWidth; |
| } |
| |
| fCharWidth = fFontSize * iCharWidth / 1000.0f; |
| if (bRTLPiece && chartype != FX_CHARTYPE::kCombination) |
| fX -= fCharWidth; |
| |
| if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) { |
| pCharPos->m_Origin = CFX_PointF(fX, fY); |
| |
| if ((dwStyles & FX_LAYOUTSTYLE_CombText) != 0) { |
| int32_t iFormWidth = iCharWidth; |
| pFont->GetCharWidth(wForm, &iFormWidth); |
| float fOffset = fFontSize * (iCharWidth - iFormWidth) / 2000.0f; |
| pCharPos->m_Origin.x += fOffset; |
| } |
| |
| if (chartype == FX_CHARTYPE::kCombination) { |
| FX_RECT rtBBox; |
| if (pFont->GetCharBBox(wForm, &rtBBox)) { |
| pCharPos->m_Origin.y = |
| fYBase + fFontSize - fFontSize * rtBBox.Height() / iMaxHeight; |
| } |
| if (wForm == wch && wLast != 0xFEFF) { |
| if (FX_GetCharType(wLast) == FX_CHARTYPE::kCombination) { |
| FX_RECT rtBox; |
| if (pFont->GetCharBBox(wLast, &rtBox)) |
| pCharPos->m_Origin.y -= fFontSize * rtBox.Height() / iMaxHeight; |
| } |
| } |
| } |
| } |
| if (!bRTLPiece && chartype != FX_CHARTYPE::kCombination) |
| 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 szCount; |
| } |
| |
| std::vector<CFX_RectF> CFGAS_TxtBreak::GetCharRects(const Run& run) const { |
| if (run.iLength < 1) |
| return std::vector<CFX_RectF>(); |
| |
| Engine* pEngine = run.pEdtEngine; |
| const wchar_t* pStr = run.wsStr.c_str(); |
| int32_t* pWidths = run.pWidths; |
| int32_t iLength = run.iLength; |
| CFX_RectF rect(*run.pRect); |
| float fFontSize = run.fFontSize; |
| bool bRTLPiece = !!(run.dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel); |
| bool bSingleLine = !!(run.dwStyles & FX_LAYOUTSTYLE_SingleLine); |
| float fStart = bRTLPiece ? rect.right() : rect.left; |
| |
| std::vector<CFX_RectF> rtArray(iLength); |
| for (int32_t i = 0; i < iLength; i++) { |
| wchar_t wch; |
| int32_t iCharSize; |
| if (pEngine) { |
| int32_t iAbsolute = i + run.iStart; |
| wch = pEngine->GetChar(iAbsolute); |
| iCharSize = pEngine->GetWidthOfChar(iAbsolute); |
| } else { |
| wch = *pStr++; |
| iCharSize = *pWidths++; |
| } |
| float fCharSize = static_cast<float>(iCharSize) / kConversionFactor; |
| bool bRet = (!bSingleLine && IsCtrlCode(wch)); |
| if (!(wch == L'\v' || wch == L'\f' || wch == 0x2028 || wch == 0x2029 || |
| wch == L'\n')) { |
| bRet = false; |
| } |
| if (bRet) |
| fCharSize = fFontSize / 2.0f; |
| rect.left = fStart; |
| if (bRTLPiece) { |
| rect.left -= fCharSize; |
| fStart -= fCharSize; |
| } else { |
| fStart += fCharSize; |
| } |
| rect.width = fCharSize; |
| rtArray[i] = rect; |
| } |
| return rtArray; |
| } |
| |
| CFGAS_TxtBreak::Engine::~Engine() = default; |
| |
| CFGAS_TxtBreak::Run::Run() = default; |
| |
| CFGAS_TxtBreak::Run::~Run() = default; |
| |
| CFGAS_TxtBreak::Run::Run(const CFGAS_TxtBreak::Run& other) = default; |
