fgas_textbreak.cpp revision 4d3acf4ec42bf6e838f9060103aff98fbf170794 
1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#include "xfa/fgas/layout/fgas_textbreak.h"
8
9#include <algorithm>
10
11#include "core/fxcrt/fx_arabic.h"
12#include "core/fxcrt/fx_arb.h"
13#include "core/fxcrt/fx_memory.h"
14#include "third_party/base/ptr_util.h"
15#include "xfa/fgas/font/cfgas_gefont.h"
16#include "xfa/fgas/layout/fgas_linebreak.h"
17#include "xfa/fgas/layout/fgas_unicode.h"
18
19namespace {
20
21typedef uint32_t (CFX_TxtBreak::*FX_TxtBreak_LPFAppendChar)(
22    CFX_TxtChar* pCurChar,
23    int32_t iRotation);
24const FX_TxtBreak_LPFAppendChar g_FX_TxtBreak_lpfAppendChar[16] = {
25    &CFX_TxtBreak::AppendChar_Others,      &CFX_TxtBreak::AppendChar_Tab,
26    &CFX_TxtBreak::AppendChar_Others,      &CFX_TxtBreak::AppendChar_Control,
27    &CFX_TxtBreak::AppendChar_Combination, &CFX_TxtBreak::AppendChar_Others,
28    &CFX_TxtBreak::AppendChar_Others,      &CFX_TxtBreak::AppendChar_Arabic,
29    &CFX_TxtBreak::AppendChar_Arabic,      &CFX_TxtBreak::AppendChar_Arabic,
30    &CFX_TxtBreak::AppendChar_Arabic,      &CFX_TxtBreak::AppendChar_Arabic,
31    &CFX_TxtBreak::AppendChar_Arabic,      &CFX_TxtBreak::AppendChar_Others,
32    &CFX_TxtBreak::AppendChar_Others,      &CFX_TxtBreak::AppendChar_Others,
33};
34
35}  // namespace
36
37CFX_TxtBreak::CFX_TxtBreak(uint32_t dwPolicies)
38    : m_dwPolicies(dwPolicies),
39      m_iLineWidth(2000000),
40      m_dwLayoutStyles(0),
41      m_bVertical(false),
42      m_bArabicContext(false),
43      m_bArabicShapes(false),
44      m_bRTL(false),
45      m_bSingleLine(false),
46      m_bCombText(false),
47      m_iArabicContext(1),
48      m_iCurArabicContext(1),
49      m_pFont(nullptr),
50      m_iFontSize(240),
51      m_bEquidistant(true),
52      m_iTabWidth(720000),
53      m_wDefChar(0xFEFF),
54      m_wParagBreakChar(L'\n'),
55      m_iDefChar(0),
56      m_iLineRotation(0),
57      m_iCharRotation(0),
58      m_iRotation(0),
59      m_iAlignment(FX_TXTLINEALIGNMENT_Left),
60      m_dwContextCharStyles(0),
61      m_iCombWidth(360000),
62      m_pUserData(nullptr),
63      m_eCharType(FX_CHARTYPE_Unknown),
64      m_bArabicNumber(false),
65      m_bArabicComma(false),
66      m_pCurLine(nullptr),
67      m_iReady(0),
68      m_iTolerance(0),
69      m_iHorScale(100),
70      m_iVerScale(100),
71      m_iCharSpace(0) {
72  m_bPagination = (m_dwPolicies & FX_TXTBREAKPOLICY_Pagination) != 0;
73  int32_t iSize = m_bPagination ? sizeof(CFX_Char) : sizeof(CFX_TxtChar);
74  m_pTxtLine1 = pdfium::MakeUnique<CFX_TxtLine>(iSize);
75  m_pTxtLine2 = pdfium::MakeUnique<CFX_TxtLine>(iSize);
76  m_pCurLine = m_pTxtLine1.get();
77  ResetArabicContext();
78}
79
80CFX_TxtBreak::~CFX_TxtBreak() {
81  Reset();
82}
83
84void CFX_TxtBreak::SetLineWidth(FX_FLOAT fLineWidth) {
85  m_iLineWidth = FXSYS_round(fLineWidth * 20000.0f);
86  ASSERT(m_iLineWidth >= 20000);
87}
88
89void CFX_TxtBreak::SetLinePos(FX_FLOAT fLinePos) {
90  int32_t iLinePos = FXSYS_round(fLinePos * 20000.0f);
91  if (iLinePos < 0) {
92    iLinePos = 0;
93  }
94  if (iLinePos > m_iLineWidth) {
95    iLinePos = m_iLineWidth;
96  }
97  m_pCurLine->m_iStart = iLinePos;
98  m_pCurLine->m_iWidth += iLinePos;
99}
100
101void CFX_TxtBreak::SetLayoutStyles(uint32_t dwLayoutStyles) {
102  m_dwLayoutStyles = dwLayoutStyles;
103  m_bVertical = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_VerticalChars) != 0;
104  m_bArabicContext = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ArabicContext) != 0;
105  m_bArabicShapes = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ArabicShapes) != 0;
106  m_bRTL = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_RTLReadingOrder) != 0;
107  m_bSingleLine = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_SingleLine) != 0;
108  m_bCombText = (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_CombText) != 0;
109  ResetArabicContext();
110  m_iLineRotation = GetLineRotation(m_dwLayoutStyles);
111  m_iRotation = m_iLineRotation + m_iCharRotation;
112  m_iRotation %= 4;
113}
114
115void CFX_TxtBreak::SetFont(const CFX_RetainPtr<CFGAS_GEFont>& pFont) {
116  if (!pFont || pFont == m_pFont)
117    return;
118
119  SetBreakStatus();
120  m_pFont = pFont;
121  m_iDefChar = 0;
122  if (m_wDefChar != 0xFEFF && m_pFont) {
123    m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
124    m_iDefChar *= m_iFontSize;
125  }
126}
127
128void CFX_TxtBreak::SetFontSize(FX_FLOAT fFontSize) {
129  int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
130  if (m_iFontSize == iFontSize) {
131    return;
132  }
133  SetBreakStatus();
134  m_iFontSize = iFontSize;
135  m_iDefChar = 0;
136  if (m_wDefChar != 0xFEFF && m_pFont) {
137    m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
138    m_iDefChar *= m_iFontSize;
139  }
140}
141
142void CFX_TxtBreak::SetTabWidth(FX_FLOAT fTabWidth, bool bEquidistant) {
143  m_iTabWidth = FXSYS_round(fTabWidth * 20000.0f);
144  if (m_iTabWidth < FX_TXTBREAK_MinimumTabWidth) {
145    m_iTabWidth = FX_TXTBREAK_MinimumTabWidth;
146  }
147  m_bEquidistant = bEquidistant;
148}
149
150void CFX_TxtBreak::SetDefaultChar(FX_WCHAR wch) {
151  m_wDefChar = wch;
152  m_iDefChar = 0;
153  if (m_wDefChar != 0xFEFF && m_pFont) {
154    m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
155    if (m_iDefChar < 0) {
156      m_iDefChar = 0;
157    } else {
158      m_iDefChar *= m_iFontSize;
159    }
160  }
161}
162
163void CFX_TxtBreak::SetParagraphBreakChar(FX_WCHAR wch) {
164  if (wch != L'\r' && wch != L'\n') {
165    return;
166  }
167  m_wParagBreakChar = wch;
168}
169
170void CFX_TxtBreak::SetLineBreakTolerance(FX_FLOAT fTolerance) {
171  m_iTolerance = FXSYS_round(fTolerance * 20000.0f);
172}
173
174void CFX_TxtBreak::SetCharRotation(int32_t iCharRotation) {
175  if (iCharRotation < 0) {
176    iCharRotation += (-iCharRotation / 4 + 1) * 4;
177  } else if (iCharRotation > 3) {
178    iCharRotation -= (iCharRotation / 4) * 4;
179  }
180  if (m_iCharRotation == iCharRotation) {
181    return;
182  }
183  SetBreakStatus();
184  m_iCharRotation = iCharRotation;
185  m_iRotation = m_iLineRotation + m_iCharRotation;
186  m_iRotation %= 4;
187}
188
189void CFX_TxtBreak::SetAlignment(int32_t iAlignment) {
190  ASSERT(iAlignment >= FX_TXTLINEALIGNMENT_Left &&
191         iAlignment <= FX_TXTLINEALIGNMENT_Distributed);
192  m_iAlignment = iAlignment;
193  ResetArabicContext();
194}
195
196void CFX_TxtBreak::ResetContextCharStyles() {
197  m_dwContextCharStyles = m_bArabicContext ? m_iCurAlignment : m_iAlignment;
198  if (m_bArabicNumber) {
199    m_dwContextCharStyles |= FX_TXTCHARSTYLE_ArabicNumber;
200  }
201  if (m_bArabicComma) {
202    m_dwContextCharStyles |= FX_TXTCHARSTYLE_ArabicComma;
203  }
204  if ((m_bArabicContext && m_bCurRTL) || (!m_bArabicContext && m_bRTL)) {
205    m_dwContextCharStyles |= FX_TXTCHARSTYLE_RTLReadingOrder;
206  }
207  m_dwContextCharStyles |= (m_iArabicContext << 8);
208}
209
210uint32_t CFX_TxtBreak::GetContextCharStyles() const {
211  return m_dwContextCharStyles;
212}
213
214void CFX_TxtBreak::SetContextCharStyles(uint32_t dwCharStyles) {
215  m_iCurAlignment = dwCharStyles & 0x0F;
216  m_bArabicNumber = (dwCharStyles & FX_TXTCHARSTYLE_ArabicNumber) != 0;
217  m_bArabicComma = (dwCharStyles & FX_TXTCHARSTYLE_ArabicComma) != 0;
218  m_bCurRTL = (dwCharStyles & FX_TXTCHARSTYLE_RTLReadingOrder) != 0;
219  m_iCurArabicContext = m_iArabicContext = ((dwCharStyles & 0x0300) >> 8);
220  ResetContextCharStyles();
221}
222
223void CFX_TxtBreak::SetCombWidth(FX_FLOAT fCombWidth) {
224  m_iCombWidth = FXSYS_round(fCombWidth * 20000.0f);
225}
226
227void CFX_TxtBreak::SetUserData(void* pUserData) {
228  if (m_pUserData == pUserData) {
229    return;
230  }
231  SetBreakStatus();
232  m_pUserData = pUserData;
233}
234
235void CFX_TxtBreak::SetBreakStatus() {
236  if (m_bPagination) {
237    return;
238  }
239  int32_t iCount = m_pCurLine->CountChars();
240  if (iCount < 1) {
241    return;
242  }
243  CFX_TxtChar* pTC = m_pCurLine->GetCharPtr(iCount - 1);
244  if (pTC->m_dwStatus == 0) {
245    pTC->m_dwStatus = FX_TXTBREAK_PieceBreak;
246  }
247}
248
249void CFX_TxtBreak::SetHorizontalScale(int32_t iScale) {
250  if (iScale < 0) {
251    iScale = 0;
252  }
253  if (iScale == m_iHorScale) {
254    return;
255  }
256  SetBreakStatus();
257  m_iHorScale = iScale;
258}
259
260void CFX_TxtBreak::SetVerticalScale(int32_t iScale) {
261  if (iScale < 0) {
262    iScale = 0;
263  }
264  if (iScale == m_iHorScale) {
265    return;
266  }
267  SetBreakStatus();
268  m_iVerScale = iScale;
269}
270
271void CFX_TxtBreak::SetCharSpace(FX_FLOAT fCharSpace) {
272  m_iCharSpace = FXSYS_round(fCharSpace * 20000.0f);
273}
274
275static const int32_t gs_FX_TxtLineRotations[8] = {0, 3, 1, 0, 2, 1, 3, 2};
276int32_t CFX_TxtBreak::GetLineRotation(uint32_t dwStyles) const {
277  return gs_FX_TxtLineRotations[(dwStyles & 0x0E) >> 1];
278}
279
280CFX_TxtChar* CFX_TxtBreak::GetLastChar(int32_t index, bool bOmitChar) const {
281  CFX_TxtCharArray& ca = *m_pCurLine->m_pLineChars.get();
282  int32_t iCount = ca.GetSize();
283  if (index < 0 || index >= iCount) {
284    return nullptr;
285  }
286  CFX_TxtChar* pTC;
287  int32_t iStart = iCount - 1;
288  while (iStart > -1) {
289    pTC = ca.GetDataPtr(iStart--);
290    if (bOmitChar && pTC->GetCharType() == FX_CHARTYPE_Combination) {
291      continue;
292    }
293    if (--index < 0) {
294      return pTC;
295    }
296  }
297  return nullptr;
298}
299
300CFX_TxtLine* CFX_TxtBreak::GetTxtLine(bool bReady) const {
301  if (!bReady)
302    return m_pCurLine;
303  if (m_iReady == 1)
304    return m_pTxtLine1.get();
305  if (m_iReady == 2)
306    return m_pTxtLine2.get();
307  return nullptr;
308}
309
310CFX_TxtPieceArray* CFX_TxtBreak::GetTxtPieces(bool bReady) const {
311  CFX_TxtLine* pTxtLine = GetTxtLine(bReady);
312  if (!pTxtLine) {
313    return nullptr;
314  }
315  return pTxtLine->m_pLinePieces.get();
316}
317
318inline FX_CHARTYPE CFX_TxtBreak::GetUnifiedCharType(
319    FX_CHARTYPE chartype) const {
320  return chartype >= FX_CHARTYPE_ArabicAlef ? FX_CHARTYPE_Arabic : chartype;
321}
322
323void CFX_TxtBreak::ResetArabicContext() {
324  if (m_bArabicContext) {
325    m_bCurRTL = m_iCurArabicContext > 1;
326    m_iCurAlignment = m_iCurArabicContext > 1 ? FX_TXTLINEALIGNMENT_Right
327                                              : FX_TXTLINEALIGNMENT_Left;
328    m_iCurAlignment |= (m_iAlignment & FX_TXTLINEALIGNMENT_HigherMask);
329    m_bArabicNumber = m_iArabicContext >= 1 && m_bArabicShapes;
330  } else {
331    if (m_bPagination) {
332      m_bCurRTL = false;
333      m_iCurAlignment = 0;
334    } else {
335      m_bCurRTL = m_bRTL;
336      m_iCurAlignment = m_iAlignment;
337    }
338    if (m_bRTL) {
339      m_bArabicNumber = m_iArabicContext >= 1;
340    } else {
341      m_bArabicNumber = m_iArabicContext > 1;
342    }
343    m_bArabicNumber = m_bArabicNumber && m_bArabicShapes;
344  }
345  m_bArabicComma = m_bArabicNumber;
346  ResetContextCharStyles();
347}
348
349void CFX_TxtBreak::AppendChar_PageLoad(CFX_TxtChar* pCurChar,
350                                       uint32_t dwProps) {
351  if (!m_bPagination) {
352    pCurChar->m_dwStatus = 0;
353    pCurChar->m_pUserData = m_pUserData;
354  }
355  if (m_bArabicContext || m_bArabicShapes) {
356    int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
357    int32_t iArabicContext =
358        (iBidiCls == FX_BIDICLASS_R || iBidiCls == FX_BIDICLASS_AL)
359            ? 2
360            : ((iBidiCls == FX_BIDICLASS_L || iBidiCls == FX_BIDICLASS_S) ? 0
361                                                                          : 1);
362    if (iArabicContext != m_iArabicContext && iArabicContext != 1) {
363      m_iArabicContext = iArabicContext;
364      if (m_iCurArabicContext == 1) {
365        m_iCurArabicContext = iArabicContext;
366      }
367      ResetArabicContext();
368      if (!m_bPagination) {
369        CFX_TxtChar* pLastChar = GetLastChar(1, false);
370        if (pLastChar && pLastChar->m_dwStatus < 1) {
371          pLastChar->m_dwStatus = FX_TXTBREAK_PieceBreak;
372        }
373      }
374    }
375  }
376  pCurChar->m_dwCharStyles = m_dwContextCharStyles;
377}
378
379uint32_t CFX_TxtBreak::AppendChar_Combination(CFX_TxtChar* pCurChar,
380                                              int32_t iRotation) {
381  FX_WCHAR wch = pCurChar->m_wCharCode;
382  FX_WCHAR wForm;
383  int32_t iCharWidth = 0;
384  pCurChar->m_iCharWidth = -1;
385  if (m_bCombText) {
386    iCharWidth = m_iCombWidth;
387  } else {
388    if (m_bVertical != FX_IsOdd(iRotation)) {
389      iCharWidth = 1000;
390    } else {
391      wForm = wch;
392      if (!m_bPagination) {
393        CFX_TxtChar* pLastChar = GetLastChar(0, false);
394        if (pLastChar &&
395            (pLastChar->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicShadda) == 0) {
396          bool bShadda = false;
397          if (wch == 0x0651) {
398            FX_WCHAR wLast = pLastChar->m_wCharCode;
399            if (wLast >= 0x064C && wLast <= 0x0650) {
400              wForm = FX_GetArabicFromShaddaTable(wLast);
401              bShadda = true;
402            }
403          } else if (wch >= 0x064C && wch <= 0x0650) {
404            if (pLastChar->m_wCharCode == 0x0651) {
405              wForm = FX_GetArabicFromShaddaTable(wch);
406              bShadda = true;
407            }
408          }
409          if (bShadda) {
410            pLastChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
411            pLastChar->m_iCharWidth = 0;
412            pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
413          }
414        }
415      }
416      if (!m_pFont->GetCharWidth(wForm, iCharWidth, false)) {
417        iCharWidth = 0;
418      }
419    }
420    iCharWidth *= m_iFontSize;
421    iCharWidth = iCharWidth * m_iHorScale / 100;
422  }
423  pCurChar->m_iCharWidth = -iCharWidth;
424  return FX_TXTBREAK_None;
425}
426
427uint32_t CFX_TxtBreak::AppendChar_Tab(CFX_TxtChar* pCurChar,
428                                      int32_t iRotation) {
429  m_eCharType = FX_CHARTYPE_Tab;
430  if ((m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_ExpandTab) == 0) {
431    return FX_TXTBREAK_None;
432  }
433  int32_t& iLineWidth = m_pCurLine->m_iWidth;
434  int32_t iCharWidth;
435  if (m_bCombText) {
436    iCharWidth = m_iCombWidth;
437  } else {
438    if (m_bEquidistant) {
439      iCharWidth = iLineWidth;
440      iCharWidth = m_iTabWidth * (iCharWidth / m_iTabWidth + 1) - iCharWidth;
441      if (iCharWidth < FX_TXTBREAK_MinimumTabWidth) {
442        iCharWidth += m_iTabWidth;
443      }
444    } else {
445      iCharWidth = m_iTabWidth;
446    }
447  }
448  pCurChar->m_iCharWidth = iCharWidth;
449  iLineWidth += iCharWidth;
450  if (!m_bSingleLine && iLineWidth >= m_iLineWidth + m_iTolerance) {
451    return EndBreak(FX_TXTBREAK_LineBreak);
452  }
453  return FX_TXTBREAK_None;
454}
455
456uint32_t CFX_TxtBreak::AppendChar_Control(CFX_TxtChar* pCurChar,
457                                          int32_t iRotation) {
458  m_eCharType = FX_CHARTYPE_Control;
459  uint32_t dwRet = FX_TXTBREAK_None;
460  if (!m_bSingleLine) {
461    FX_WCHAR wch = pCurChar->m_wCharCode;
462    switch (wch) {
463      case L'\v':
464      case 0x2028:
465        dwRet = FX_TXTBREAK_LineBreak;
466        break;
467      case L'\f':
468        dwRet = FX_TXTBREAK_PageBreak;
469        break;
470      case 0x2029:
471        dwRet = FX_TXTBREAK_ParagraphBreak;
472        break;
473      default:
474        if (wch == m_wParagBreakChar) {
475          dwRet = FX_TXTBREAK_ParagraphBreak;
476        }
477        break;
478    }
479    if (dwRet != FX_TXTBREAK_None) {
480      dwRet = EndBreak(dwRet);
481    }
482  }
483  return dwRet;
484}
485
486uint32_t CFX_TxtBreak::AppendChar_Arabic(CFX_TxtChar* pCurChar,
487                                         int32_t iRotation) {
488  FX_CHARTYPE chartype = pCurChar->GetCharType();
489  int32_t& iLineWidth = m_pCurLine->m_iWidth;
490  FX_WCHAR wForm;
491  int32_t iCharWidth = 0;
492  CFX_Char* pLastChar = nullptr;
493  bool bAlef = false;
494  if (!m_bCombText && m_eCharType >= FX_CHARTYPE_ArabicAlef &&
495      m_eCharType <= FX_CHARTYPE_ArabicDistortion) {
496    pLastChar = GetLastChar(1);
497    if (pLastChar) {
498      iCharWidth = pLastChar->m_iCharWidth;
499      if (iCharWidth > 0) {
500        iLineWidth -= iCharWidth;
501      }
502      CFX_Char* pPrevChar = GetLastChar(2);
503      wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar);
504      bAlef = (wForm == 0xFEFF &&
505               pLastChar->GetCharType() == FX_CHARTYPE_ArabicAlef);
506      int32_t iLastRotation = pLastChar->m_nRotation + m_iLineRotation;
507      if (m_bVertical && (pLastChar->m_dwCharProps & 0x8000) != 0) {
508        iLastRotation++;
509      }
510      if (m_bVertical != FX_IsOdd(iLastRotation)) {
511        iCharWidth = 1000;
512      } else {
513        m_pFont->GetCharWidth(wForm, iCharWidth, false);
514      }
515      if (wForm == 0xFEFF) {
516        iCharWidth = m_iDefChar;
517      }
518      iCharWidth *= m_iFontSize;
519      iCharWidth = iCharWidth * m_iHorScale / 100;
520      pLastChar->m_iCharWidth = iCharWidth;
521      iLineWidth += iCharWidth;
522      iCharWidth = 0;
523    }
524  }
525  m_eCharType = chartype;
526  wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar,
527                                      nullptr);
528  if (m_bCombText) {
529    iCharWidth = m_iCombWidth;
530  } else {
531    if (m_bVertical != FX_IsOdd(iRotation)) {
532      iCharWidth = 1000;
533    } else {
534      m_pFont->GetCharWidth(wForm, iCharWidth, false);
535    }
536    if (wForm == 0xFEFF) {
537      iCharWidth = m_iDefChar;
538    }
539    iCharWidth *= m_iFontSize;
540    iCharWidth = iCharWidth * m_iHorScale / 100;
541  }
542  pCurChar->m_iCharWidth = iCharWidth;
543  iLineWidth += iCharWidth;
544  m_pCurLine->m_iArabicChars++;
545  if (!m_bSingleLine && iLineWidth > m_iLineWidth + m_iTolerance) {
546    return EndBreak(FX_TXTBREAK_LineBreak);
547  }
548  return FX_TXTBREAK_None;
549}
550
551uint32_t CFX_TxtBreak::AppendChar_Others(CFX_TxtChar* pCurChar,
552                                         int32_t iRotation) {
553  uint32_t dwProps = pCurChar->m_dwCharProps;
554  FX_CHARTYPE chartype = pCurChar->GetCharType();
555  int32_t& iLineWidth = m_pCurLine->m_iWidth;
556  int32_t iCharWidth = 0;
557  m_eCharType = chartype;
558  FX_WCHAR wch = pCurChar->m_wCharCode;
559  FX_WCHAR wForm = wch;
560  if (chartype == FX_CHARTYPE_Numeric) {
561    if (m_bArabicNumber) {
562      wForm = wch + 0x0630;
563      pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicIndic;
564    }
565  } else if (wch == L',') {
566    if (m_bArabicShapes && m_iCurArabicContext > 0) {
567      wForm = 0x060C;
568      pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicComma;
569    }
570  } else if (m_bCurRTL || m_bVertical) {
571    wForm = FX_GetMirrorChar(wch, dwProps, m_bCurRTL, m_bVertical);
572  }
573  if (m_bCombText) {
574    iCharWidth = m_iCombWidth;
575  } else {
576    if (m_bVertical != FX_IsOdd(iRotation)) {
577      iCharWidth = 1000;
578    } else if (!m_pFont->GetCharWidth(wForm, iCharWidth, false)) {
579      iCharWidth = m_iDefChar;
580    }
581    iCharWidth *= m_iFontSize;
582    iCharWidth = iCharWidth * m_iHorScale / 100;
583  }
584  iCharWidth += m_iCharSpace;
585  pCurChar->m_iCharWidth = iCharWidth;
586  iLineWidth += iCharWidth;
587  bool bBreak = (chartype != FX_CHARTYPE_Space ||
588                 (m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0);
589  if (!m_bSingleLine && bBreak && iLineWidth > m_iLineWidth + m_iTolerance) {
590    return EndBreak(FX_TXTBREAK_LineBreak);
591  }
592  return FX_TXTBREAK_None;
593}
594
595uint32_t CFX_TxtBreak::AppendChar(FX_WCHAR wch) {
596  uint32_t dwProps = kTextLayoutCodeProperties[(uint16_t)wch];
597  FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps);
598  CFX_TxtChar* pCurChar = m_pCurLine->m_pLineChars->AddSpace();
599  pCurChar->m_wCharCode = (uint16_t)wch;
600  pCurChar->m_nRotation = m_iCharRotation;
601  pCurChar->m_dwCharProps = dwProps;
602  pCurChar->m_dwCharStyles = 0;
603  pCurChar->m_iCharWidth = 0;
604  pCurChar->m_iHorizontalScale = m_iHorScale;
605  pCurChar->m_iVertialScale = m_iVerScale;
606  pCurChar->m_dwStatus = 0;
607  pCurChar->m_iBidiClass = 0;
608  pCurChar->m_iBidiLevel = 0;
609  pCurChar->m_iBidiPos = 0;
610  pCurChar->m_iBidiOrder = 0;
611  pCurChar->m_pUserData = nullptr;
612  AppendChar_PageLoad(pCurChar, dwProps);
613  uint32_t dwRet1 = FX_TXTBREAK_None;
614  if (chartype != FX_CHARTYPE_Combination &&
615      GetUnifiedCharType(m_eCharType) != GetUnifiedCharType(chartype)) {
616    if (m_eCharType != FX_CHARTYPE_Unknown &&
617        m_pCurLine->m_iWidth > m_iLineWidth + m_iTolerance && !m_bSingleLine) {
618      if (m_eCharType != FX_CHARTYPE_Space || chartype != FX_CHARTYPE_Control) {
619        dwRet1 = EndBreak(FX_TXTBREAK_LineBreak);
620        int32_t iCount = m_pCurLine->CountChars();
621        if (iCount > 0) {
622          pCurChar = m_pCurLine->m_pLineChars->GetDataPtr(iCount - 1);
623        }
624      }
625    }
626  }
627  int32_t iRotation = m_iRotation;
628  if (m_bVertical && (dwProps & 0x8000) != 0) {
629    iRotation = (iRotation + 1) % 4;
630  }
631  uint32_t dwRet2 =
632      (this->*g_FX_TxtBreak_lpfAppendChar[chartype >> FX_CHARTYPEBITS])(
633          pCurChar, iRotation);
634  return std::max(dwRet1, dwRet2);
635}
636
637void CFX_TxtBreak::EndBreak_UpdateArabicShapes() {
638  ASSERT(m_bArabicShapes);
639  int32_t iCount = m_pCurLine->CountChars();
640  if (iCount < 2) {
641    return;
642  }
643  int32_t& iLineWidth = m_pCurLine->m_iWidth;
644  CFX_Char* pCur = m_pCurLine->GetCharPtr(0);
645  bool bPrevNum = (pCur->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
646  pCur = m_pCurLine->GetCharPtr(1);
647  FX_WCHAR wch, wForm;
648  bool bNextNum;
649  int32_t i = 1;
650  int32_t iCharWidth;
651  int32_t iRotation;
652  CFX_Char* pNext;
653  do {
654    i++;
655    if (i < iCount) {
656      pNext = m_pCurLine->GetCharPtr(i);
657      bNextNum = (pNext->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
658    } else {
659      pNext = nullptr;
660      bNextNum = false;
661    }
662    wch = pCur->m_wCharCode;
663    if (wch == L'.') {
664      if (bPrevNum && bNextNum) {
665        iRotation = m_iRotation;
666        if (m_bVertical && (pCur->m_dwCharProps & 0x8000) != 0) {
667          iRotation = ((iRotation + 1) & 0x03);
668        }
669        wForm = wch == L'.' ? 0x066B : 0x066C;
670        iLineWidth -= pCur->m_iCharWidth;
671        if (m_bCombText) {
672          iCharWidth = m_iCombWidth;
673        } else {
674          if (m_bVertical != FX_IsOdd(iRotation)) {
675            iCharWidth = 1000;
676          } else if (!m_pFont->GetCharWidth(wForm, iCharWidth, false)) {
677            iCharWidth = m_iDefChar;
678          }
679          iCharWidth *= m_iFontSize;
680          iCharWidth = iCharWidth * m_iHorScale / 100;
681        }
682        pCur->m_iCharWidth = iCharWidth;
683        iLineWidth += iCharWidth;
684      }
685    }
686    bPrevNum = (pCur->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicIndic) != 0;
687    pCur = pNext;
688  } while (i < iCount);
689}
690
691bool CFX_TxtBreak::EndBreak_SplitLine(CFX_TxtLine* pNextLine,
692                                      bool bAllChars,
693                                      uint32_t dwStatus) {
694  int32_t iCount = m_pCurLine->CountChars();
695  bool bDone = false;
696  CFX_Char* pTC;
697  if (!m_bSingleLine && m_pCurLine->m_iWidth > m_iLineWidth + m_iTolerance) {
698    pTC = m_pCurLine->GetCharPtr(iCount - 1);
699    switch (pTC->GetCharType()) {
700      case FX_CHARTYPE_Tab:
701      case FX_CHARTYPE_Control:
702        break;
703      case FX_CHARTYPE_Space:
704        if ((m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0) {
705          SplitTextLine(m_pCurLine, pNextLine, !m_bPagination && bAllChars);
706          bDone = true;
707        }
708        break;
709      default:
710        SplitTextLine(m_pCurLine, pNextLine, !m_bPagination && bAllChars);
711        bDone = true;
712        break;
713    }
714  }
715  iCount = m_pCurLine->CountChars();
716  CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
717  CFX_TxtPiece tp;
718  if (m_bPagination) {
719    tp.m_dwStatus = dwStatus;
720    tp.m_iStartPos = m_pCurLine->m_iStart;
721    tp.m_iWidth = m_pCurLine->m_iWidth;
722    tp.m_iStartChar = 0;
723    tp.m_iChars = iCount;
724    tp.m_pChars = m_pCurLine->m_pLineChars.get();
725    tp.m_pUserData = m_pUserData;
726    pTC = m_pCurLine->GetCharPtr(0);
727    tp.m_dwCharStyles = pTC->m_dwCharStyles;
728    tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
729    tp.m_iVerticalScale = pTC->m_iVertialScale;
730    pCurPieces->Add(tp);
731    m_pCurLine = pNextLine;
732    m_eCharType = FX_CHARTYPE_Unknown;
733    return true;
734  }
735  if (bAllChars && !bDone) {
736    int32_t iEndPos = m_pCurLine->m_iWidth;
737    GetBreakPos(*m_pCurLine->m_pLineChars.get(), iEndPos, bAllChars, true);
738  }
739  return false;
740}
741
742void CFX_TxtBreak::EndBreak_BidiLine(CFX_TPOArray& tpos, uint32_t dwStatus) {
743  CFX_TxtPiece tp;
744  FX_TPO tpo;
745  CFX_TxtChar* pTC;
746  int32_t i, j;
747  CFX_TxtCharArray& chars = *m_pCurLine->m_pLineChars.get();
748  int32_t iCount = m_pCurLine->CountChars();
749  bool bDone = (m_pCurLine->m_iArabicChars > 0 || m_bCurRTL);
750  if (!m_bPagination && bDone) {
751    int32_t iBidiNum = 0;
752    for (i = 0; i < iCount; i++) {
753      pTC = chars.GetDataPtr(i);
754      pTC->m_iBidiPos = i;
755      if (pTC->GetCharType() != FX_CHARTYPE_Control) {
756        iBidiNum = i;
757      }
758      if (i == 0) {
759        pTC->m_iBidiLevel = 1;
760      }
761    }
762    FX_BidiLine(chars, iBidiNum + 1, m_bCurRTL ? 1 : 0);
763  }
764  CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
765  if (!m_bPagination &&
766      (bDone || (m_dwLayoutStyles & FX_TXTLAYOUTSTYLE_MutipleFormat) != 0)) {
767    tp.m_dwStatus = FX_TXTBREAK_PieceBreak;
768    tp.m_iStartPos = m_pCurLine->m_iStart;
769    tp.m_pChars = m_pCurLine->m_pLineChars.get();
770    int32_t iBidiLevel = -1, iCharWidth;
771    i = 0, j = -1;
772    while (i < iCount) {
773      pTC = chars.GetDataPtr(i);
774      if (iBidiLevel < 0) {
775        iBidiLevel = pTC->m_iBidiLevel;
776        tp.m_iWidth = 0;
777        tp.m_iBidiLevel = iBidiLevel;
778        tp.m_iBidiPos = pTC->m_iBidiOrder;
779        tp.m_dwCharStyles = pTC->m_dwCharStyles;
780        tp.m_pUserData = pTC->m_pUserData;
781        tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
782        tp.m_iVerticalScale = pTC->m_iVertialScale;
783        tp.m_dwStatus = FX_TXTBREAK_PieceBreak;
784      }
785      if (iBidiLevel != pTC->m_iBidiLevel || pTC->m_dwStatus != 0) {
786        if (iBidiLevel == pTC->m_iBidiLevel) {
787          tp.m_dwStatus = pTC->m_dwStatus;
788          iCharWidth = pTC->m_iCharWidth;
789          if (iCharWidth > 0) {
790            tp.m_iWidth += iCharWidth;
791          }
792          i++;
793        }
794        tp.m_iChars = i - tp.m_iStartChar;
795        pCurPieces->Add(tp);
796        tp.m_iStartPos += tp.m_iWidth;
797        tp.m_iStartChar = i;
798        tpo.index = ++j;
799        tpo.pos = tp.m_iBidiPos;
800        tpos.Add(tpo);
801        iBidiLevel = -1;
802      } else {
803        iCharWidth = pTC->m_iCharWidth;
804        if (iCharWidth > 0) {
805          tp.m_iWidth += iCharWidth;
806        }
807        i++;
808      }
809    }
810    if (i > tp.m_iStartChar) {
811      tp.m_dwStatus = dwStatus;
812      tp.m_iChars = i - tp.m_iStartChar;
813      pCurPieces->Add(tp);
814      tpo.index = ++j;
815      tpo.pos = tp.m_iBidiPos;
816      tpos.Add(tpo);
817    }
818    if (j > -1) {
819      if (j > 0) {
820        FX_TEXTLAYOUT_PieceSort(tpos, 0, j);
821        int32_t iStartPos = 0;
822        for (i = 0; i <= j; i++) {
823          tpo = tpos.GetAt(i);
824          CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
825          ttp.m_iStartPos = iStartPos;
826          iStartPos += ttp.m_iWidth;
827        }
828      }
829      CFX_TxtPiece& ttp = pCurPieces->GetAt(j);
830      ttp.m_dwStatus = dwStatus;
831    }
832  } else {
833    tp.m_dwStatus = dwStatus;
834    tp.m_iStartPos = m_pCurLine->m_iStart;
835    tp.m_iWidth = m_pCurLine->m_iWidth;
836    tp.m_iStartChar = 0;
837    tp.m_iChars = iCount;
838    tp.m_pChars = m_pCurLine->m_pLineChars.get();
839    tp.m_pUserData = m_pUserData;
840    pTC = chars.GetDataPtr(0);
841    tp.m_dwCharStyles = pTC->m_dwCharStyles;
842    tp.m_iHorizontalScale = pTC->m_iHorizontalScale;
843    tp.m_iVerticalScale = pTC->m_iVertialScale;
844    pCurPieces->Add(tp);
845    tpo.index = 0;
846    tpo.pos = 0;
847    tpos.Add(tpo);
848  }
849}
850
851void CFX_TxtBreak::EndBreak_Alignment(CFX_TPOArray& tpos,
852                                      bool bAllChars,
853                                      uint32_t dwStatus) {
854  int32_t iNetWidth = m_pCurLine->m_iWidth, iGapChars = 0, iCharWidth;
855  CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
856  int32_t i, j, iCount = pCurPieces->GetSize();
857  bool bFind = false;
858  FX_TPO tpo;
859  CFX_TxtChar* pTC;
860  FX_CHARTYPE chartype;
861  for (i = iCount - 1; i > -1; i--) {
862    tpo = tpos.GetAt(i);
863    CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
864    if (!bFind) {
865      iNetWidth = ttp.GetEndPos();
866    }
867    bool bArabic = FX_IsOdd(ttp.m_iBidiLevel);
868    j = bArabic ? 0 : ttp.m_iChars - 1;
869    while (j > -1 && j < ttp.m_iChars) {
870      pTC = ttp.GetCharPtr(j);
871      if (pTC->m_nBreakType == FX_LBT_DIRECT_BRK) {
872        iGapChars++;
873      }
874      if (!bFind || !bAllChars) {
875        chartype = pTC->GetCharType();
876        if (chartype == FX_CHARTYPE_Space || chartype == FX_CHARTYPE_Control) {
877          if (!bFind) {
878            iCharWidth = pTC->m_iCharWidth;
879            if (bAllChars && iCharWidth > 0) {
880              iNetWidth -= iCharWidth;
881            }
882          }
883        } else {
884          bFind = true;
885          if (!bAllChars) {
886            break;
887          }
888        }
889      }
890      j += bArabic ? 1 : -1;
891    }
892    if (!bAllChars && bFind) {
893      break;
894    }
895  }
896  int32_t iOffset = m_iLineWidth - iNetWidth;
897  int32_t iLowerAlignment = (m_iCurAlignment & FX_TXTLINEALIGNMENT_LowerMask);
898  int32_t iHigherAlignment = (m_iCurAlignment & FX_TXTLINEALIGNMENT_HigherMask);
899  if (iGapChars > 0 && (iHigherAlignment == FX_TXTLINEALIGNMENT_Distributed ||
900                        (iHigherAlignment == FX_TXTLINEALIGNMENT_Justified &&
901                         dwStatus != FX_TXTBREAK_ParagraphBreak))) {
902    int32_t iStart = -1;
903    for (i = 0; i < iCount; i++) {
904      tpo = tpos.GetAt(i);
905      CFX_TxtPiece& ttp = pCurPieces->GetAt(tpo.index);
906      if (iStart < -1) {
907        iStart = ttp.m_iStartPos;
908      } else {
909        ttp.m_iStartPos = iStart;
910      }
911      int32_t k;
912      for (j = 0; j < ttp.m_iChars; j++) {
913        pTC = ttp.GetCharPtr(j);
914        if (pTC->m_nBreakType != FX_LBT_DIRECT_BRK || pTC->m_iCharWidth < 0) {
915          continue;
916        }
917        k = iOffset / iGapChars;
918        pTC->m_iCharWidth += k;
919        ttp.m_iWidth += k;
920        iOffset -= k;
921        iGapChars--;
922        if (iGapChars < 1) {
923          break;
924        }
925      }
926      iStart += ttp.m_iWidth;
927    }
928  } else if (iLowerAlignment > FX_TXTLINEALIGNMENT_Left) {
929    if (iLowerAlignment == FX_TXTLINEALIGNMENT_Center) {
930      iOffset /= 2;
931    }
932    if (iOffset > 0) {
933      for (i = 0; i < iCount; i++) {
934        CFX_TxtPiece& ttp = pCurPieces->GetAt(i);
935        ttp.m_iStartPos += iOffset;
936      }
937    }
938  }
939}
940
941uint32_t CFX_TxtBreak::EndBreak(uint32_t dwStatus) {
942  ASSERT(dwStatus >= FX_TXTBREAK_PieceBreak &&
943         dwStatus <= FX_TXTBREAK_PageBreak);
944  CFX_TxtPieceArray* pCurPieces = m_pCurLine->m_pLinePieces.get();
945  int32_t iCount = pCurPieces->GetSize();
946  if (iCount > 0) {
947    CFX_TxtPiece* pLastPiece = pCurPieces->GetPtrAt(--iCount);
948    if (dwStatus > FX_TXTBREAK_PieceBreak) {
949      pLastPiece->m_dwStatus = dwStatus;
950    } else {
951      dwStatus = pLastPiece->m_dwStatus;
952    }
953    return dwStatus;
954  } else {
955    CFX_TxtLine* pLastLine = GetTxtLine(true);
956    if (pLastLine) {
957      pCurPieces = pLastLine->m_pLinePieces.get();
958      iCount = pCurPieces->GetSize();
959      if (iCount-- > 0) {
960        CFX_TxtPiece* pLastPiece = pCurPieces->GetPtrAt(iCount);
961        if (dwStatus > FX_TXTBREAK_PieceBreak) {
962          pLastPiece->m_dwStatus = dwStatus;
963        } else {
964          dwStatus = pLastPiece->m_dwStatus;
965        }
966        return dwStatus;
967      }
968      return FX_TXTBREAK_None;
969    }
970    iCount = m_pCurLine->CountChars();
971    if (iCount < 1) {
972      return FX_TXTBREAK_None;
973    }
974    if (!m_bPagination) {
975      CFX_TxtChar* pTC = m_pCurLine->GetCharPtr(iCount - 1);
976      pTC->m_dwStatus = dwStatus;
977    }
978    if (dwStatus <= FX_TXTBREAK_PieceBreak) {
979      return dwStatus;
980    }
981  }
982  m_iReady = (m_pCurLine == m_pTxtLine1.get()) ? 1 : 2;
983  CFX_TxtLine* pNextLine =
984      (m_pCurLine == m_pTxtLine1.get()) ? m_pTxtLine2.get() : m_pTxtLine1.get();
985  bool bAllChars = (m_iCurAlignment > FX_TXTLINEALIGNMENT_Right);
986  CFX_TPOArray tpos(100);
987  CFX_Char* pTC;
988  if (m_bArabicShapes) {
989    EndBreak_UpdateArabicShapes();
990  }
991  if (EndBreak_SplitLine(pNextLine, bAllChars, dwStatus)) {
992    goto EndBreak_Ret;
993  }
994  EndBreak_BidiLine(tpos, dwStatus);
995  if (!m_bPagination && m_iCurAlignment > FX_TXTLINEALIGNMENT_Left) {
996    EndBreak_Alignment(tpos, bAllChars, dwStatus);
997  }
998EndBreak_Ret:
999  m_pCurLine = pNextLine;
1000  pTC = GetLastChar(0, false);
1001  m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE_Unknown;
1002  if (dwStatus == FX_TXTBREAK_ParagraphBreak) {
1003    m_iArabicContext = m_iCurArabicContext = 1;
1004    ResetArabicContext();
1005  }
1006  return dwStatus;
1007}
1008
1009int32_t CFX_TxtBreak::GetBreakPos(CFX_TxtCharArray& ca,
1010                                  int32_t& iEndPos,
1011                                  bool bAllChars,
1012                                  bool bOnlyBrk) {
1013  int32_t iLength = ca.GetSize() - 1;
1014  if (iLength < 1) {
1015    return iLength;
1016  }
1017  int32_t iBreak = -1, iBreakPos = -1, iIndirect = -1, iIndirectPos = -1,
1018          iLast = -1, iLastPos = -1;
1019  if (m_bSingleLine || iEndPos <= m_iLineWidth) {
1020    if (!bAllChars) {
1021      return iLength;
1022    }
1023    iBreak = iLength;
1024    iBreakPos = iEndPos;
1025  }
1026  bool bSpaceBreak = (m_dwPolicies & FX_TXTBREAKPOLICY_SpaceBreak) != 0;
1027  bool bNumberBreak = (m_dwPolicies & FX_TXTBREAKPOLICY_NumberBreak) != 0;
1028  FX_LINEBREAKTYPE eType;
1029  uint32_t nCodeProp, nCur, nNext;
1030  CFX_Char* pCur = ca.GetDataPtr(iLength--);
1031  if (bAllChars) {
1032    pCur->m_nBreakType = FX_LBT_UNKNOWN;
1033  }
1034  nCodeProp = pCur->m_dwCharProps;
1035  nNext = nCodeProp & 0x003F;
1036  int32_t iCharWidth = pCur->m_iCharWidth;
1037  if (iCharWidth > 0) {
1038    iEndPos -= iCharWidth;
1039  }
1040  while (iLength >= 0) {
1041    pCur = ca.GetDataPtr(iLength);
1042    nCodeProp = pCur->m_dwCharProps;
1043    nCur = nCodeProp & 0x003F;
1044    if (nCur == FX_CBP_SP) {
1045      if (nNext == FX_CBP_SP) {
1046        eType = bSpaceBreak ? FX_LBT_DIRECT_BRK : FX_LBT_PROHIBITED_BRK;
1047      } else {
1048        eType = gs_FX_LineBreak_PairTable[nCur][nNext];
1049      }
1050    } else if (bNumberBreak && nCur == FX_CBP_NU && nNext == FX_CBP_NU) {
1051      eType = FX_LBT_DIRECT_BRK;
1052    } else {
1053      if (nNext == FX_CBP_SP) {
1054        eType = FX_LBT_PROHIBITED_BRK;
1055      } else {
1056        eType = gs_FX_LineBreak_PairTable[nCur][nNext];
1057      }
1058    }
1059    if (bAllChars) {
1060      pCur->m_nBreakType = (uint8_t)eType;
1061    }
1062    if (!bOnlyBrk) {
1063      if (m_bSingleLine || iEndPos <= m_iLineWidth ||
1064          (nCur == FX_CBP_SP && !bSpaceBreak)) {
1065        if (eType == FX_LBT_DIRECT_BRK && iBreak < 0) {
1066          iBreak = iLength;
1067          iBreakPos = iEndPos;
1068          if (!bAllChars) {
1069            return iLength;
1070          }
1071        } else if (eType == FX_LBT_INDIRECT_BRK && iIndirect < 0) {
1072          iIndirect = iLength;
1073          iIndirectPos = iEndPos;
1074        }
1075        if (iLast < 0) {
1076          iLast = iLength;
1077          iLastPos = iEndPos;
1078        }
1079      }
1080      iCharWidth = pCur->m_iCharWidth;
1081      if (iCharWidth > 0) {
1082        iEndPos -= iCharWidth;
1083      }
1084    }
1085    nNext = nCodeProp & 0x003F;
1086    iLength--;
1087  }
1088  if (bOnlyBrk) {
1089    return 0;
1090  }
1091  if (iBreak > -1) {
1092    iEndPos = iBreakPos;
1093    return iBreak;
1094  }
1095  if (iIndirect > -1) {
1096    iEndPos = iIndirectPos;
1097    return iIndirect;
1098  }
1099  if (iLast > -1) {
1100    iEndPos = iLastPos;
1101    return iLast;
1102  }
1103  return 0;
1104}
1105
1106void CFX_TxtBreak::SplitTextLine(CFX_TxtLine* pCurLine,
1107                                 CFX_TxtLine* pNextLine,
1108                                 bool bAllChars) {
1109  ASSERT(pCurLine && pNextLine);
1110  int32_t iCount = pCurLine->CountChars();
1111  if (iCount < 2) {
1112    return;
1113  }
1114  int32_t iEndPos = pCurLine->m_iWidth;
1115  CFX_TxtCharArray& curChars = *pCurLine->m_pLineChars.get();
1116  int32_t iCharPos = GetBreakPos(curChars, iEndPos, bAllChars, false);
1117  if (iCharPos < 0) {
1118    iCharPos = 0;
1119  }
1120  iCharPos++;
1121  if (iCharPos >= iCount) {
1122    pNextLine->RemoveAll(true);
1123    CFX_Char* pTC = curChars.GetDataPtr(iCharPos - 1);
1124    pTC->m_nBreakType = FX_LBT_UNKNOWN;
1125    return;
1126  }
1127  CFX_TxtCharArray& nextChars = *pNextLine->m_pLineChars.get();
1128  int cur_size = curChars.GetSize();
1129  nextChars.SetSize(cur_size - iCharPos);
1130  FXSYS_memcpy(nextChars.GetData(), curChars.GetDataPtr(iCharPos),
1131               (cur_size - iCharPos) * sizeof(CFX_TxtChar));
1132  iCount -= iCharPos;
1133  cur_size = curChars.GetSize();
1134  curChars.RemoveAt(cur_size - iCount, iCount);
1135  pCurLine->m_iWidth = iEndPos;
1136  CFX_TxtChar* pTC = curChars.GetDataPtr(iCharPos - 1);
1137  pTC->m_nBreakType = FX_LBT_UNKNOWN;
1138  iCount = nextChars.GetSize();
1139  int32_t iCharWidth, iWidth = 0;
1140  for (int32_t i = 0; i < iCount; i++) {
1141    pTC = nextChars.GetDataPtr(i);
1142    if (pTC->GetCharType() >= FX_CHARTYPE_ArabicAlef) {
1143      pCurLine->m_iArabicChars--;
1144      pNextLine->m_iArabicChars++;
1145    }
1146    iCharWidth = pTC->m_iCharWidth;
1147    if (iCharWidth > 0) {
1148      iWidth += iCharWidth;
1149    }
1150    if (m_bPagination) {
1151      continue;
1152    }
1153    pTC->m_dwStatus = 0;
1154  }
1155  pNextLine->m_iWidth = iWidth;
1156}
1157
1158int32_t CFX_TxtBreak::CountBreakChars() const {
1159  CFX_TxtLine* pTxtLine = GetTxtLine(true);
1160  return pTxtLine ? pTxtLine->CountChars() : 0;
1161}
1162
1163int32_t CFX_TxtBreak::CountBreakPieces() const {
1164  CFX_TxtPieceArray* pTxtPieces = GetTxtPieces(true);
1165  return pTxtPieces ? pTxtPieces->GetSize() : 0;
1166}
1167
1168const CFX_TxtPiece* CFX_TxtBreak::GetBreakPiece(int32_t index) const {
1169  CFX_TxtPieceArray* pTxtPieces = GetTxtPieces(true);
1170  if (!pTxtPieces) {
1171    return nullptr;
1172  }
1173  if (index < 0 || index >= pTxtPieces->GetSize()) {
1174    return nullptr;
1175  }
1176  return pTxtPieces->GetPtrAt(index);
1177}
1178
1179void CFX_TxtBreak::ClearBreakPieces() {
1180  CFX_TxtLine* pTxtLine = GetTxtLine(true);
1181  if (pTxtLine) {
1182    pTxtLine->RemoveAll(true);
1183  }
1184  m_iReady = 0;
1185}
1186
1187void CFX_TxtBreak::Reset() {
1188  m_eCharType = FX_CHARTYPE_Unknown;
1189  m_iArabicContext = m_iCurArabicContext = 1;
1190  ResetArabicContext();
1191  m_pTxtLine1->RemoveAll(true);
1192  m_pTxtLine2->RemoveAll(true);
1193}
1194
1195struct FX_FORMCHAR {
1196  uint16_t wch;
1197  uint16_t wForm;
1198  int32_t iWidth;
1199};
1200
1201int32_t CFX_TxtBreak::GetDisplayPos(const FX_TXTRUN* pTxtRun,
1202                                    FXTEXT_CHARPOS* pCharPos,
1203                                    bool bCharCode,
1204                                    CFX_WideString* pWSForms,
1205                                    FX_AdjustCharDisplayPos pAdjustPos) const {
1206  if (!pTxtRun || pTxtRun->iLength < 1) {
1207    return 0;
1208  }
1209  IFX_TxtAccess* pAccess = pTxtRun->pAccess;
1210  const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity;
1211  const FX_WCHAR* pStr = pTxtRun->wsStr.c_str();
1212  int32_t* pWidths = pTxtRun->pWidths;
1213  int32_t iLength = pTxtRun->iLength - 1;
1214  CFX_RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
1215  uint32_t dwStyles = pTxtRun->dwStyles;
1216  CFX_RectF rtText(*pTxtRun->pRect);
1217  bool bRTLPiece = (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0;
1218  bool bArabicNumber =
1219      (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_ArabicNumber) != 0;
1220  bool bArabicComma =
1221      (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_ArabicComma) != 0;
1222  FX_FLOAT fFontSize = pTxtRun->fFontSize;
1223  int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
1224  int32_t iAscent = pFont->GetAscent();
1225  int32_t iDescent = pFont->GetDescent();
1226  int32_t iMaxHeight = iAscent - iDescent;
1227  FX_FLOAT fFontHeight = fFontSize;
1228  FX_FLOAT fAscent = fFontHeight * (FX_FLOAT)iAscent / (FX_FLOAT)iMaxHeight;
1229  FX_FLOAT fDescent = fFontHeight * (FX_FLOAT)iDescent / (FX_FLOAT)iMaxHeight;
1230  bool bVerticalDoc = (dwStyles & FX_TXTLAYOUTSTYLE_VerticalLayout) != 0;
1231  bool bVerticalChar = (dwStyles & FX_TXTLAYOUTSTYLE_VerticalChars) != 0;
1232  int32_t iRotation = GetLineRotation(dwStyles) + pTxtRun->iCharRotation;
1233  FX_FLOAT fX, fY, fCharWidth, fCharHeight;
1234  int32_t iHorScale = pTxtRun->iHorizontalScale;
1235  int32_t iVerScale = pTxtRun->iVerticalScale;
1236  bool bSkipSpace = pTxtRun->bSkipSpace;
1237  FX_FORMCHAR formChars[3];
1238  FX_FLOAT fYBase;
1239  fX = rtText.left;
1240  if (bVerticalDoc) {
1241    fX += (rtText.width - fFontSize) / 2.0f;
1242    fYBase = bRTLPiece ? rtText.bottom() : rtText.top;
1243    fY = fYBase;
1244  } else {
1245    if (bRTLPiece) {
1246      fX = rtText.right();
1247    }
1248    fYBase = rtText.top + (rtText.height - fFontSize) / 2.0f;
1249    fY = fYBase + fAscent;
1250  }
1251  int32_t iCount = 0;
1252  int32_t iNext = 0;
1253  FX_WCHAR wPrev = 0xFEFF;
1254  FX_WCHAR wNext = 0xFEFF;
1255  FX_WCHAR wForm = 0xFEFF;
1256  FX_WCHAR wLast = 0xFEFF;
1257  bool bShadda = false;
1258  bool bLam = false;
1259  for (int32_t i = 0; i <= iLength; i++) {
1260    int32_t iWidth;
1261    FX_WCHAR wch;
1262    if (pAccess) {
1263      wch = pAccess->GetChar(pIdentity, i);
1264      iWidth = pAccess->GetWidth(pIdentity, i);
1265    } else {
1266      wch = *pStr++;
1267      iWidth = *pWidths++;
1268    }
1269    uint32_t dwProps = FX_GetUnicodeProperties(wch);
1270    FX_CHARTYPE chartype = GetCharTypeFromProp(dwProps);
1271    if (chartype == FX_CHARTYPE_ArabicAlef && iWidth == 0) {
1272      wPrev = 0xFEFF;
1273      wLast = wch;
1274      continue;
1275    }
1276    if (chartype >= FX_CHARTYPE_ArabicAlef) {
1277      if (i < iLength) {
1278        if (pAccess) {
1279          iNext = i + 1;
1280          while (iNext <= iLength) {
1281            wNext = pAccess->GetChar(pIdentity, iNext);
1282            dwProps = FX_GetUnicodeProperties(wNext);
1283            if ((dwProps & FX_CHARTYPEBITSMASK) != FX_CHARTYPE_Combination) {
1284              break;
1285            }
1286            iNext++;
1287          }
1288          if (iNext > iLength) {
1289            wNext = 0xFEFF;
1290          }
1291        } else {
1292          int32_t j = -1;
1293          do {
1294            j++;
1295            if (i + j >= iLength) {
1296              break;
1297            }
1298            wNext = pStr[j];
1299            dwProps = FX_GetUnicodeProperties(wNext);
1300          } while ((dwProps & FX_CHARTYPEBITSMASK) == FX_CHARTYPE_Combination);
1301          if (i + j >= iLength) {
1302            wNext = 0xFEFF;
1303          }
1304        }
1305      } else {
1306        wNext = 0xFEFF;
1307      }
1308      wForm = pdfium::arabic::GetFormChar(wch, wPrev, wNext);
1309      bLam = (wPrev == 0x0644 && wch == 0x0644 && wNext == 0x0647);
1310    } else if (chartype == FX_CHARTYPE_Combination) {
1311      wForm = wch;
1312      if (wch >= 0x064C && wch <= 0x0651) {
1313        if (bShadda) {
1314          wForm = 0xFEFF;
1315          bShadda = false;
1316        } else {
1317          wNext = 0xFEFF;
1318          if (pAccess) {
1319            iNext = i + 1;
1320            if (iNext <= iLength) {
1321              wNext = pAccess->GetChar(pIdentity, iNext);
1322            }
1323          } else {
1324            if (i < iLength) {
1325              wNext = *pStr;
1326            }
1327          }
1328          if (wch == 0x0651) {
1329            if (wNext >= 0x064C && wNext <= 0x0650) {
1330              wForm = FX_GetArabicFromShaddaTable(wNext);
1331              bShadda = true;
1332            }
1333          } else {
1334            if (wNext == 0x0651) {
1335              wForm = FX_GetArabicFromShaddaTable(wch);
1336              bShadda = true;
1337            }
1338          }
1339        }
1340      } else {
1341        bShadda = false;
1342      }
1343    } else if (chartype == FX_CHARTYPE_Numeric) {
1344      wForm = wch;
1345      if (bArabicNumber) {
1346        wForm += 0x0630;
1347      }
1348    } else if (wch == L'.') {
1349      wForm = wch;
1350      if (bArabicNumber) {
1351        wNext = 0xFEFF;
1352        if (pAccess) {
1353          iNext = i + 1;
1354          if (iNext <= iLength) {
1355            wNext = pAccess->GetChar(pIdentity, iNext);
1356          }
1357        } else {
1358          if (i < iLength) {
1359            wNext = *pStr;
1360          }
1361        }
1362        if (wNext >= L'0' && wNext <= L'9') {
1363          wForm = 0x066B;
1364        }
1365      }
1366    } else if (wch == L',') {
1367      wForm = wch;
1368      if (bArabicComma) {
1369        wForm = 0x060C;
1370      }
1371    } else if (bRTLPiece || bVerticalChar) {
1372      wForm = FX_GetMirrorChar(wch, dwProps, bRTLPiece, bVerticalChar);
1373    } else {
1374      wForm = wch;
1375    }
1376    if (chartype != FX_CHARTYPE_Combination) {
1377      bShadda = false;
1378    }
1379    if (chartype < FX_CHARTYPE_ArabicAlef) {
1380      bLam = false;
1381    }
1382    dwProps = FX_GetUnicodeProperties(wForm);
1383    int32_t iCharRotation = iRotation;
1384    if (bVerticalChar && (dwProps & 0x8000) != 0) {
1385      iCharRotation++;
1386    }
1387    iCharRotation %= 4;
1388    bool bEmptyChar =
1389        (chartype >= FX_CHARTYPE_Tab && chartype <= FX_CHARTYPE_Control);
1390    if (wForm == 0xFEFF) {
1391      bEmptyChar = true;
1392    }
1393    int32_t iForms = bLam ? 3 : 1;
1394    iCount += (bEmptyChar && bSkipSpace) ? 0 : iForms;
1395    if (!pCharPos) {
1396      if (iWidth > 0) {
1397        wPrev = wch;
1398      }
1399      wLast = wch;
1400      continue;
1401    }
1402    int32_t iCharWidth = iWidth;
1403    if (iCharWidth < 0) {
1404      iCharWidth = -iCharWidth;
1405    }
1406    iCharWidth /= iFontSize;
1407    formChars[0].wch = wch;
1408    formChars[0].wForm = wForm;
1409    formChars[0].iWidth = iCharWidth;
1410    if (bLam) {
1411      formChars[1].wForm = 0x0651;
1412      iCharWidth = 0;
1413      pFont->GetCharWidth(0x0651, iCharWidth, false);
1414      formChars[1].iWidth = iCharWidth;
1415      formChars[2].wForm = 0x0670;
1416      iCharWidth = 0;
1417      pFont->GetCharWidth(0x0670, iCharWidth, false);
1418      formChars[2].iWidth = iCharWidth;
1419    }
1420    for (int32_t j = 0; j < iForms; j++) {
1421      wForm = (FX_WCHAR)formChars[j].wForm;
1422      iCharWidth = formChars[j].iWidth;
1423      if (j > 0) {
1424        chartype = FX_CHARTYPE_Combination;
1425        wch = wForm;
1426        wLast = (FX_WCHAR)formChars[j - 1].wForm;
1427      }
1428      if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
1429        pCharPos->m_GlyphIndex =
1430            bCharCode ? wch : pFont->GetGlyphIndex(wForm, false);
1431#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
1432        pCharPos->m_ExtGID = pCharPos->m_GlyphIndex;
1433#endif
1434        pCharPos->m_FontCharWidth = iCharWidth;
1435        if (pWSForms) {
1436          *pWSForms += wForm;
1437        }
1438      }
1439      int32_t iCharHeight;
1440      if (bVerticalDoc) {
1441        iCharHeight = iCharWidth;
1442        iCharWidth = 1000;
1443      } else {
1444        iCharHeight = 1000;
1445      }
1446      fCharWidth = fFontSize * iCharWidth / 1000.0f;
1447      fCharHeight = fFontSize * iCharHeight / 1000.0f;
1448      if (bRTLPiece && chartype != FX_CHARTYPE_Combination) {
1449        if (bVerticalDoc) {
1450          fY -= fCharHeight;
1451        } else {
1452          fX -= fCharWidth;
1453        }
1454      }
1455      if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
1456        pCharPos->m_OriginX = fX;
1457        pCharPos->m_OriginY = fY;
1458        if ((dwStyles & FX_TXTLAYOUTSTYLE_CombText) != 0) {
1459          int32_t iFormWidth = iCharWidth;
1460          pFont->GetCharWidth(wForm, iFormWidth, false);
1461          FX_FLOAT fOffset = fFontSize * (iCharWidth - iFormWidth) / 2000.0f;
1462          if (bVerticalDoc) {
1463            pCharPos->m_OriginY += fOffset;
1464          } else {
1465            pCharPos->m_OriginX += fOffset;
1466          }
1467        }
1468        if (chartype == FX_CHARTYPE_Combination) {
1469          CFX_Rect rtBBox;
1470          rtBBox.Reset();
1471          if (pFont->GetCharBBox(wForm, &rtBBox, false)) {
1472            pCharPos->m_OriginY =
1473                fYBase + fFontSize -
1474                fFontSize * (FX_FLOAT)rtBBox.height / (FX_FLOAT)iMaxHeight;
1475          }
1476          if (wForm == wch && wLast != 0xFEFF) {
1477            uint32_t dwLastProps = FX_GetUnicodeProperties(wLast);
1478            if ((dwLastProps & FX_CHARTYPEBITSMASK) ==
1479                FX_CHARTYPE_Combination) {
1480              CFX_Rect rtBox;
1481              rtBox.Reset();
1482              if (pFont->GetCharBBox(wLast, &rtBox, false)) {
1483                pCharPos->m_OriginY -= fFontSize * rtBox.height / iMaxHeight;
1484              }
1485            }
1486          }
1487        }
1488        CFX_PointF ptOffset;
1489        bool bAdjusted = false;
1490        if (pAdjustPos) {
1491          bAdjusted = pAdjustPos(wForm, bCharCode, pFont, fFontSize,
1492                                 bVerticalChar, ptOffset);
1493        }
1494        if (!bAdjusted && bVerticalChar && (dwProps & 0x00010000) != 0) {
1495          CFX_Rect rtBBox;
1496          rtBBox.Reset();
1497          if (pFont->GetCharBBox(wForm, &rtBBox, false)) {
1498            ptOffset.x = fFontSize * (850 - rtBBox.right()) / iMaxHeight;
1499            ptOffset.y = fFontSize * (iAscent - rtBBox.top - 150) / iMaxHeight;
1500          }
1501        }
1502        pCharPos->m_OriginX += ptOffset.x;
1503        pCharPos->m_OriginY -= ptOffset.y;
1504      }
1505      if (!bRTLPiece && chartype != FX_CHARTYPE_Combination) {
1506        if (bVerticalDoc) {
1507          fY += fCharHeight;
1508        } else {
1509          fX += fCharWidth;
1510        }
1511      }
1512      if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
1513        pCharPos->m_bGlyphAdjust = true;
1514        if (bVerticalDoc) {
1515          if (iCharRotation == 0) {
1516            pCharPos->m_AdjustMatrix[0] = -1;
1517            pCharPos->m_AdjustMatrix[1] = 0;
1518            pCharPos->m_AdjustMatrix[2] = 0;
1519            pCharPos->m_AdjustMatrix[3] = 1;
1520            pCharPos->m_OriginY += fAscent;
1521          } else if (iCharRotation == 1) {
1522            pCharPos->m_AdjustMatrix[0] = 0;
1523            pCharPos->m_AdjustMatrix[1] = -1;
1524            pCharPos->m_AdjustMatrix[2] = -1;
1525            pCharPos->m_AdjustMatrix[3] = 0;
1526            pCharPos->m_OriginX -= fDescent;
1527          } else if (iCharRotation == 2) {
1528            pCharPos->m_AdjustMatrix[0] = 1;
1529            pCharPos->m_AdjustMatrix[1] = 0;
1530            pCharPos->m_AdjustMatrix[2] = 0;
1531            pCharPos->m_AdjustMatrix[3] = -1;
1532            pCharPos->m_OriginX += fCharWidth;
1533            pCharPos->m_OriginY += fAscent;
1534          } else {
1535            pCharPos->m_AdjustMatrix[0] = 0;
1536            pCharPos->m_AdjustMatrix[1] = 1;
1537            pCharPos->m_AdjustMatrix[2] = 1;
1538            pCharPos->m_AdjustMatrix[3] = 0;
1539            pCharPos->m_OriginX += fAscent;
1540          }
1541        } else {
1542          if (iCharRotation == 0) {
1543            pCharPos->m_AdjustMatrix[0] = -1;
1544            pCharPos->m_AdjustMatrix[1] = 0;
1545            pCharPos->m_AdjustMatrix[2] = 0;
1546            pCharPos->m_AdjustMatrix[3] = 1;
1547          } else if (iCharRotation == 1) {
1548            pCharPos->m_AdjustMatrix[0] = 0;
1549            pCharPos->m_AdjustMatrix[1] = -1;
1550            pCharPos->m_AdjustMatrix[2] = -1;
1551            pCharPos->m_AdjustMatrix[3] = 0;
1552            pCharPos->m_OriginX -= fDescent;
1553            pCharPos->m_OriginY -= fAscent + fDescent;
1554          } else if (iCharRotation == 2) {
1555            pCharPos->m_AdjustMatrix[0] = 1;
1556            pCharPos->m_AdjustMatrix[1] = 0;
1557            pCharPos->m_AdjustMatrix[2] = 0;
1558            pCharPos->m_AdjustMatrix[3] = -1;
1559            pCharPos->m_OriginX += fCharWidth;
1560            pCharPos->m_OriginY -= fAscent;
1561          } else {
1562            pCharPos->m_AdjustMatrix[0] = 0;
1563            pCharPos->m_AdjustMatrix[1] = 1;
1564            pCharPos->m_AdjustMatrix[2] = 1;
1565            pCharPos->m_AdjustMatrix[3] = 0;
1566            pCharPos->m_OriginX += fAscent;
1567          }
1568        }
1569        if (iHorScale != 100 || iVerScale != 100) {
1570          pCharPos->m_AdjustMatrix[0] =
1571              pCharPos->m_AdjustMatrix[0] * iHorScale / 100.0f;
1572          pCharPos->m_AdjustMatrix[1] =
1573              pCharPos->m_AdjustMatrix[1] * iHorScale / 100.0f;
1574          pCharPos->m_AdjustMatrix[2] =
1575              pCharPos->m_AdjustMatrix[2] * iVerScale / 100.0f;
1576          pCharPos->m_AdjustMatrix[3] =
1577              pCharPos->m_AdjustMatrix[3] * iVerScale / 100.0f;
1578        }
1579        pCharPos++;
1580      }
1581    }
1582    if (iWidth > 0) {
1583      wPrev = (FX_WCHAR)formChars[0].wch;
1584    }
1585    wLast = wch;
1586  }
1587  return iCount;
1588}
1589
1590int32_t CFX_TxtBreak::GetCharRects(const FX_TXTRUN* pTxtRun,
1591                                   CFX_RectFArray& rtArray,
1592                                   bool bCharBBox) const {
1593  if (!pTxtRun || pTxtRun->iLength < 1)
1594    return 0;
1595
1596  IFX_TxtAccess* pAccess = pTxtRun->pAccess;
1597  const FDE_TEXTEDITPIECE* pIdentity = pTxtRun->pIdentity;
1598  const FX_WCHAR* pStr = pTxtRun->wsStr.c_str();
1599  int32_t* pWidths = pTxtRun->pWidths;
1600  int32_t iLength = pTxtRun->iLength;
1601  CFX_RectF rect(*pTxtRun->pRect);
1602  bool bRTLPiece = (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0;
1603  FX_FLOAT fFontSize = pTxtRun->fFontSize;
1604  int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
1605  FX_FLOAT fScale = fFontSize / 1000.0f;
1606  CFX_RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
1607  if (!pFont)
1608    bCharBBox = false;
1609
1610  CFX_Rect bbox;
1611  bbox.Set(0, 0, 0, 0);
1612  if (bCharBBox)
1613    bCharBBox = pFont->GetBBox(&bbox);
1614
1615  FX_FLOAT fLeft = std::max(0.0f, bbox.left * fScale);
1616  FX_FLOAT fHeight = FXSYS_fabs(bbox.height * fScale);
1617  rtArray.RemoveAll();
1618  rtArray.SetSize(iLength);
1619  bool bVertical = (pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_VerticalLayout) != 0;
1620  bool bSingleLine = (pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_SingleLine) != 0;
1621  bool bCombText = (pTxtRun->dwStyles & FX_TXTLAYOUTSTYLE_CombText) != 0;
1622  FX_WCHAR wch, wLineBreakChar = pTxtRun->wLineBreakChar;
1623  int32_t iCharSize;
1624  FX_FLOAT fCharSize, fStart;
1625  if (bVertical) {
1626    fStart = bRTLPiece ? rect.bottom() : rect.top;
1627  } else {
1628    fStart = bRTLPiece ? rect.right() : rect.left;
1629  }
1630  for (int32_t i = 0; i < iLength; i++) {
1631    if (pAccess) {
1632      wch = pAccess->GetChar(pIdentity, i);
1633      iCharSize = pAccess->GetWidth(pIdentity, i);
1634    } else {
1635      wch = *pStr++;
1636      iCharSize = *pWidths++;
1637    }
1638    fCharSize = (FX_FLOAT)iCharSize / 20000.0f;
1639    bool bRet = (!bSingleLine && FX_IsCtrlCode(wch));
1640    if (!(wch == L'\v' || wch == L'\f' || wch == 0x2028 || wch == 0x2029 ||
1641          (wLineBreakChar != 0xFEFF && wch == wLineBreakChar))) {
1642      bRet = false;
1643    }
1644    if (bRet) {
1645      iCharSize = iFontSize * 500;
1646      fCharSize = fFontSize / 2.0f;
1647    }
1648    if (bVertical) {
1649      rect.top = fStart;
1650      if (bRTLPiece) {
1651        rect.top -= fCharSize;
1652        fStart -= fCharSize;
1653      } else {
1654        fStart += fCharSize;
1655      }
1656      rect.height = fCharSize;
1657    } else {
1658      rect.left = fStart;
1659      if (bRTLPiece) {
1660        rect.left -= fCharSize;
1661        fStart -= fCharSize;
1662      } else {
1663        fStart += fCharSize;
1664      }
1665      rect.width = fCharSize;
1666    }
1667    if (bCharBBox && !bRet) {
1668      int32_t iCharWidth = 1000;
1669      pFont->GetCharWidth(wch, iCharWidth, false);
1670      FX_FLOAT fRTLeft = 0, fCharWidth = 0;
1671      if (iCharWidth > 0) {
1672        fCharWidth = iCharWidth * fScale;
1673        fRTLeft = fLeft;
1674        if (bCombText) {
1675          fRTLeft = (rect.width - fCharWidth) / 2.0f;
1676        }
1677      }
1678      CFX_RectF rtBBoxF;
1679      if (bVertical) {
1680        rtBBoxF.top = rect.left + fRTLeft;
1681        rtBBoxF.left = rect.top + (rect.height - fHeight) / 2.0f;
1682        rtBBoxF.height = fCharWidth;
1683        rtBBoxF.width = fHeight;
1684        rtBBoxF.left = std::max(rtBBoxF.left, 0.0f);
1685      } else {
1686        rtBBoxF.left = rect.left + fRTLeft;
1687        rtBBoxF.top = rect.top + (rect.height - fHeight) / 2.0f;
1688        rtBBoxF.width = fCharWidth;
1689        rtBBoxF.height = fHeight;
1690        rtBBoxF.top = std::max(rtBBoxF.top, 0.0f);
1691      }
1692      rtArray.SetAt(i, rtBBoxF);
1693      continue;
1694    }
1695    rtArray.SetAt(i, rect);
1696  }
1697  return iLength;
1698}
1699
1700FX_TXTRUN::FX_TXTRUN()
1701    : pAccess(nullptr),
1702      pIdentity(nullptr),
1703      pWidths(nullptr),
1704      iLength(0),
1705      pFont(nullptr),
1706      fFontSize(12),
1707      dwStyles(0),
1708      iHorizontalScale(100),
1709      iVerticalScale(100),
1710      iCharRotation(0),
1711      dwCharStyles(0),
1712      pRect(nullptr),
1713      wLineBreakChar(L'\n'),
1714      bSkipSpace(true) {}
1715
1716FX_TXTRUN::~FX_TXTRUN() {}
1717
1718FX_TXTRUN::FX_TXTRUN(const FX_TXTRUN& other) = default;
1719
1720CFX_TxtPiece::CFX_TxtPiece()
1721    : m_dwStatus(FX_TXTBREAK_PieceBreak),
1722      m_iStartPos(0),
1723      m_iWidth(-1),
1724      m_iStartChar(0),
1725      m_iChars(0),
1726      m_iBidiLevel(0),
1727      m_iBidiPos(0),
1728      m_iHorizontalScale(100),
1729      m_iVerticalScale(100),
1730      m_dwCharStyles(0),
1731      m_pChars(nullptr),
1732      m_pUserData(nullptr) {}
1733
1734CFX_TxtLine::CFX_TxtLine(int32_t iBlockSize)
1735    : m_pLineChars(new CFX_TxtCharArray),
1736      m_pLinePieces(new CFX_TxtPieceArray(16)),
1737      m_iStart(0),
1738      m_iWidth(0),
1739      m_iArabicChars(0) {}
1740
1741CFX_TxtLine::~CFX_TxtLine() {
1742  RemoveAll();
1743}
1744