Rename text break files to match class names.

This CL renames several fgas/layout files to match the class names
contained in the files.

Change-Id: Ib4feaa902618e577261e51dbac743cb4cb500ea1
Reviewed-on: https://pdfium-review.googlesource.com/4290
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>

1 files changed, 0 insertions, 1028 deletions

diff --git a/xfa/fgas/layout/fgas_textbreak.cpp b/xfa/fgas/layout/fgas_textbreak.cpp
deleted file mode 100644
index 83a03eed5e..0000000000
--- a/xfa/fgas/layout/fgas_textbreak.cpp
+++ /dev/null
@@ -1,1028 +0,0 @@
-// 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/fgas_textbreak.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/fgas_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;