Merge to XFA: Get rid of most instance of 'foo == NULL'

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1520063002 .

(cherry picked from commit e385244f8cd6ae376f6b3cf1265a0795d5d30eff)

Review URL: https://codereview.chromium.org/1528763003 .

3 files changed, 15 insertions, 20 deletions

diff --git a/core/src/fpdftext/fpdf_text.cpp b/core/src/fpdftext/fpdf_text.cpp
index 9a967e62fd..1e56bf901d 100644
--- a/core/src/fpdftext/fpdf_text.cpp
+++ b/core/src/fpdftext/fpdf_text.cpp
@@ -168,7 +168,7 @@ CTextBaseLine* CTextPage::InsertTextBox(CTextBaseLine* pBaseLine,
   if (str.GetLength() == 0) {
     return NULL;
   }
-  if (pBaseLine == NULL) {
+  if (!pBaseLine) {
     int i;
     for (i = 0; i < m_BaseLines.GetSize(); i++) {
       CTextBaseLine* pExistLine = m_BaseLines.GetAt(i);
@@ -180,7 +180,7 @@ CTextBaseLine* CTextPage::InsertTextBox(CTextBaseLine* pBaseLine,
         break;
       }
     }
-    if (pBaseLine == NULL) {
+    if (!pBaseLine) {
       pBaseLine = new CTextBaseLine;
       pBaseLine->m_BaseLine = basey;
       m_BaseLines.InsertAt(i, pBaseLine);
@@ -448,17 +448,17 @@ void CTextPage::FindColumns() {
     for (int j = 0; j < pBaseLine->m_TextList.GetSize(); j++) {
       CTextBox* pTextBox = pBaseLine->m_TextList.GetAt(j);
       CTextColumn* pColumn = FindColumn(pTextBox->m_Right);
-      if (pColumn == NULL) {
+      if (pColumn) {
+        pColumn->m_AvgPos =
+            (pColumn->m_Count * pColumn->m_AvgPos + pTextBox->m_Right) /
+            (pColumn->m_Count + 1);
+        pColumn->m_Count++;
+      } else {
         pColumn = new CTextColumn;
         pColumn->m_Count = 1;
         pColumn->m_AvgPos = pTextBox->m_Right;
         pColumn->m_TextPos = -1;
         m_TextColumns.Add(pColumn);
-      } else {
-        pColumn->m_AvgPos =
-            (pColumn->m_Count * pColumn->m_AvgPos + pTextBox->m_Right) /
-            (pColumn->m_Count + 1);
-        pColumn->m_Count++;
       }
     }
   }
@@ -726,7 +726,7 @@ void PDF_GetPageText_Unicode(CFX_WideStringArray& lines,
                              int iMinWidth,
                              FX_DWORD flags) {
   lines.RemoveAll();
-  if (pPage == NULL) {
+  if (!pPage) {
     return;
   }
   CPDF_Page page;
diff --git a/core/src/fpdftext/fpdf_text_int.cpp b/core/src/fpdftext/fpdf_text_int.cpp
index 8a359fe9af..1e6d54d133 100644
--- a/core/src/fpdftext/fpdf_text_int.cpp
+++ b/core/src/fpdftext/fpdf_text_int.cpp
@@ -2464,12 +2464,12 @@ FX_BOOL CPDF_TextPageFind::ExtractSubString(CFX_WideString& rString,
                                             const FX_WCHAR* lpszFullString,
                                             int iSubString,
                                             FX_WCHAR chSep) {
-  if (lpszFullString == NULL) {
+  if (!lpszFullString) {
     return FALSE;
   }
   while (iSubString--) {
     lpszFullString = FXSYS_wcschr(lpszFullString, chSep);
-    if (lpszFullString == NULL) {
+    if (!lpszFullString) {
       rString.Empty();
       return FALSE;
     }
@@ -2479,8 +2479,8 @@ FX_BOOL CPDF_TextPageFind::ExtractSubString(CFX_WideString& rString,
     }
   }
   const FX_WCHAR* lpchEnd = FXSYS_wcschr(lpszFullString, chSep);
-  int nLen = (lpchEnd == NULL) ? (int)FXSYS_wcslen(lpszFullString)
-                               : (int)(lpchEnd - lpszFullString);
+  int nLen = lpchEnd ? (int)(lpchEnd - lpszFullString)
+                     : (int)FXSYS_wcslen(lpszFullString);
   ASSERT(nLen >= 0);
   FXSYS_memcpy(rString.GetBuffer(nLen), lpszFullString,
                nLen * sizeof(FX_WCHAR));
diff --git a/core/src/fpdftext/fpdf_text_search.cpp b/core/src/fpdftext/fpdf_text_search.cpp
index 43486c7ab8..80bf5ec99a 100644
--- a/core/src/fpdftext/fpdf_text_search.cpp
+++ b/core/src/fpdftext/fpdf_text_search.cpp
@@ -303,13 +303,8 @@ void GetTextStream_Unicode(CFX_WideTextBuf& buffer,
   FX_POSITION pos = pPage->GetFirstObjectPosition();
   while (pos) {
     CPDF_PageObject* pObject = pPage->GetNextObject(pos);
-    if (pObject == NULL) {
-      continue;
-    }
-    if (pObject->m_Type != PDFPAGE_TEXT) {
-      continue;
-    }
-    textstream.ProcessObject((CPDF_TextObject*)pObject, FALSE);
+    if (pObject && pObject->m_Type == PDFPAGE_TEXT)
+      textstream.ProcessObject((CPDF_TextObject*)pObject, FALSE);
   }
 }
 CFX_WideString PDF_GetFirstTextLine_Unicode(CPDF_Document* pDoc,