Get rid of NULLs in xfa/

xfa/fde/cfde_txtedtengine.cpp

 // 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/fde/cfde_txtedtengine.h"
 
 #include "xfa/fde/cfde_txtedtbuf.h"
 #include "xfa/fde/cfde_txtedtbufiter.h"
@@ skipping 33 matching lines @@
   FXSYS_memset(&m_rtCaret, 0, sizeof(CFX_RectF));
   m_pTxtBuf = new CFDE_TxtEdtBuf();
   m_bAutoLineEnd = (m_Param.nLineEnd == FDE_TXTEDIT_LINEEND_Auto);
 }
 
 CFDE_TxtEdtEngine::~CFDE_TxtEdtEngine() {
   delete m_pTxtBuf;
   delete m_pTextBreak;
   RemoveAllParags();
   RemoveAllPages();
-  m_Param.pEventSink = NULL;
+  m_Param.pEventSink = nullptr;
   ClearSelection();
 }
 
 void CFDE_TxtEdtEngine::SetEditParams(const FDE_TXTEDTPARAMS& params) {
   if (!m_pTextBreak)
     m_pTextBreak = new CFX_TxtBreak(FX_TXTBREAKPOLICY_None);
 
   FXSYS_memcpy(&m_Param, &params, sizeof(FDE_TXTEDTPARAMS));
   m_wLineEnd = params.wLineBreakChar;
   m_bAutoLineEnd = (m_Param.nLineEnd == FDE_TXTEDIT_LINEEND_Auto);
   UpdateTxtBreak();
 }
 
 FDE_TXTEDTPARAMS* CFDE_TxtEdtEngine::GetEditParams() {
   return &m_Param;
 }
 
 int32_t CFDE_TxtEdtEngine::CountPages() const {
   if (m_nLineCount == 0) {
     return 0;
   }
   return ((m_nLineCount - 1) / m_nPageLineCount) + 1;
 }
 
 IFDE_TxtEdtPage* CFDE_TxtEdtEngine::GetPage(int32_t nIndex) {
   if (m_PagePtrArray.GetSize() <= nIndex) {
-    return NULL;
+    return nullptr;
   }
   return (IFDE_TxtEdtPage*)m_PagePtrArray[nIndex];
 }
 
 void CFDE_TxtEdtEngine::SetTextByStream(IFX_Stream* pStream) {
   ResetEngine();
   int32_t nIndex = 0;
-  if (pStream != NULL && pStream->GetLength()) {
+  if (pStream && pStream->GetLength()) {
     int32_t nStreamLength = pStream->GetLength();
     FX_BOOL bValid = TRUE;
     if (m_nLimit > 0 && nStreamLength > m_nLimit) {
       bValid = FALSE;
     }
     FX_BOOL bPreIsCR = FALSE;
     if (bValid) {
       uint8_t bom[4];
       int32_t nPos = pStream->GetBOM(bom);
       pStream->Seek(FX_STREAMSEEK_Begin, nPos);
@@ skipping 561 matching lines @@
 int32_t CFDE_TxtEdtEngine::StartLayout() {
   Lock();
   RemoveAllPages();
   m_nLayoutPos = 0;
   m_nLineCount = 0;
   return 0;
 }
 
 int32_t CFDE_TxtEdtEngine::DoLayout(IFX_Pause* pPause) {
   int32_t nCount = m_ParagPtrArray.GetSize();
-  CFDE_TxtEdtParag* pParag = NULL;
+  CFDE_TxtEdtParag* pParag = nullptr;
   int32_t nLineCount = 0;
   for (; m_nLayoutPos < nCount; m_nLayoutPos++) {
     pParag = m_ParagPtrArray[m_nLayoutPos];
     pParag->CalcLines();
     nLineCount += pParag->GetLineCount();
-    if ((pPause != NULL) && (nLineCount > m_nPageLineCount) &&
-        pPause->NeedToPauseNow()) {
+    if (pPause && nLineCount > m_nPageLineCount && pPause->NeedToPauseNow()) {
       m_nLineCount += nLineCount;
       return (++m_nLayoutPos * 100) / nCount;
     }
   }
   m_nLineCount += nLineCount;
   return 100;
 }
 
 void CFDE_TxtEdtEngine::EndLayout() {
   UpdatePages();
@@ skipping 36 matching lines @@
 int32_t CFDE_TxtEdtEngine::CountParags() const {
   return m_ParagPtrArray.GetSize();
 }
 
 CFDE_TxtEdtParag* CFDE_TxtEdtEngine::GetParag(int32_t nParagIndex) const {
   return m_ParagPtrArray[nParagIndex];
 }
 
 IFX_CharIter* CFDE_TxtEdtEngine::CreateCharIter() {
   if (!m_pTxtBuf) {
-    return NULL;
+    return nullptr;
   }
   return new CFDE_TxtEdtBufIter((CFDE_TxtEdtBuf*)m_pTxtBuf);
 }
 
 int32_t CFDE_TxtEdtEngine::Line2Parag(int32_t nStartParag,
                                       int32_t nStartLineofParag,
                                       int32_t nLineIndex,
                                       int32_t& nStartLine) const {
   int32_t nLineTotal = nStartLineofParag;
   int32_t nCount = m_ParagPtrArray.GetSize();
-  CFDE_TxtEdtParag* pParag = NULL;
+  CFDE_TxtEdtParag* pParag = nullptr;
   int32_t i = nStartParag;
   for (; i < nCount; i++) {
     pParag = m_ParagPtrArray[i];
     nLineTotal += pParag->GetLineCount();
     if (nLineTotal > nLineIndex) {
       break;
     }
   }
   nStartLine = nLineTotal - pParag->GetLineCount();
   return i;
@@ skipping 232 matching lines @@
   for (int32_t i = 0; i < m_PagePtrArray.GetSize(); i++)
     delete m_PagePtrArray[i];
   m_PagePtrArray.RemoveAll();
 }
 
 void CFDE_TxtEdtEngine::UpdateParags() {
   int32_t nCount = m_ParagPtrArray.GetSize();
   if (nCount == 0) {
     return;
   }
-  CFDE_TxtEdtParag* pParag = NULL;
+  CFDE_TxtEdtParag* pParag = nullptr;
   int32_t nLineCount = 0;
   int32_t i = 0;
   for (i = 0; i < nCount; i++) {
     pParag = m_ParagPtrArray[i];
     if (pParag->GetLineCount() == -1)
       pParag->CalcLines();
 
     nLineCount += pParag->GetLineCount();
   }
   m_nLineCount = nLineCount;
@@ skipping 213 matching lines @@
     IFDE_TxtEdtPage* pPage = m_PagePtrArray[m_nCaretPage];
     m_Param.pEventSink->On_PageLoad(this, m_nCaretPage, 0);
     int32_t nPageCharStart = pPage->GetCharStart();
     int32_t nPageCharCount = pPage->GetCharCount();
     if (nIndex >= nPageCharStart && nIndex < nPageCharStart + nPageCharCount) {
       m_Param.pEventSink->On_PageUnload(this, m_nCaretPage, 0);
       return m_nCaretPage;
     }
     m_Param.pEventSink->On_PageUnload(this, m_nCaretPage, 0);
   }
-  CFDE_TxtEdtParag* pParag = NULL;
+  CFDE_TxtEdtParag* pParag = nullptr;
   int32_t nLineCount = 0;
   int32_t nParagCount = m_ParagPtrArray.GetSize();
   int32_t i = 0;
   for (i = 0; i < nParagCount; i++) {
     pParag = m_ParagPtrArray[i];
     if (pParag->GetStartIndex() <= nIndex &&
         nIndex < (pParag->GetStartIndex() + pParag->GetTextLength())) {
       break;
     }
     nLineCount += pParag->GetLineCount();
@@ skipping 359 matching lines @@
       m_SelRangePtrArr.RemoveAt(nCountRange);
       DeleteRange_DoRecord(nSelStart, nSelCount, TRUE);
     }
     ClearSelection();
     m_Param.pEventSink->On_TextChanged(this, m_ChangeInfo);
     m_Param.pEventSink->On_SelChanged(this);
     SetCaretPos(nSelStart, TRUE);
     return;
   }
 }