Use smart pointers for class owned member variables

Replace raw member variables to smart pointer type to better
maintain the ownership and to ease the management.

BUG=pdfium:518

Review-Url: https://codereview.chromium.org/2136683002

12 files changed, 161 insertions, 137 deletions

diff --git a/core/fpdfapi/fpdf_parser/cpdf_parser.cpp b/core/fpdfapi/fpdf_parser/cpdf_parser.cpp
index 5540877642..e2c88d7e71 100644
--- a/core/fpdfapi/fpdf_parser/cpdf_parser.cpp
+++ b/core/fpdfapi/fpdf_parser/cpdf_parser.cpp
@@ -51,8 +51,7 @@ int32_t GetStreamFirst(CPDF_StreamAcc* pObjStream) {
 }  // namespace
 
 CPDF_Parser::CPDF_Parser()
-    : m_pDocument(nullptr),
-      m_bOwnFileRead(true),
+    : m_bOwnFileRead(true),
       m_FileVersion(0),
       m_pTrailer(nullptr),
       m_pEncryptDict(nullptr),
@@ -127,8 +126,7 @@ void CPDF_Parser::ShrinkObjectMap(uint32_t objnum) {
 
 void CPDF_Parser::CloseParser() {
   m_bVersionUpdated = false;
-  delete m_pDocument;
-  m_pDocument = nullptr;
+  m_pDocument.reset();
 
   if (m_pTrailer) {
     m_pTrailer->Release();
@@ -190,7 +188,7 @@ CPDF_Parser::Error CPDF_Parser::StartParse(IFX_FileRead* pFileAccess) {
     return FORMAT_ERROR;
 
   m_pSyntax->RestorePos(m_pSyntax->m_FileLen - m_pSyntax->m_HeaderOffset - 9);
-  m_pDocument = new CPDF_Document(this);
+  m_pDocument.reset(new CPDF_Document(this));
 
   FX_BOOL bXRefRebuilt = FALSE;
   if (m_pSyntax->SearchWord("startxref", TRUE, FALSE, 4096)) {
@@ -765,7 +763,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
                 last_obj = start_pos;
                 FX_FILESIZE obj_end = 0;
                 CPDF_Object* pObject = ParseIndirectObjectAtByStrict(
-                    m_pDocument, obj_pos, objnum, &obj_end);
+                    m_pDocument.get(), obj_pos, objnum, &obj_end);
                 if (CPDF_Stream* pStream = ToStream(pObject)) {
                   if (CPDF_Dictionary* pDict = pStream->GetDict()) {
                     if ((pDict->KeyExist("Type")) &&
@@ -828,7 +826,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
               last_trailer = pos + i - 7;
               m_pSyntax->RestorePos(pos + i - m_pSyntax->m_HeaderOffset);
 
-              CPDF_Object* pObj = m_pSyntax->GetObject(m_pDocument, 0, 0, true);
+              CPDF_Object* pObj =
+                  m_pSyntax->GetObject(m_pDocument.get(), 0, 0, true);
               if (pObj) {
                 if (!pObj->IsDictionary() && !pObj->AsStream()) {
                   pObj->Release();
@@ -850,7 +849,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
                           uint32_t dwObjNum =
                               pElement ? pElement->GetObjNum() : 0;
                           if (dwObjNum) {
-                            m_pTrailer->SetAtReference(key, m_pDocument,
+                            m_pTrailer->SetAtReference(key, m_pDocument.get(),
                                                        dwObjNum);
                           } else {
                             m_pTrailer->SetAt(key, pElement->Clone());
@@ -974,7 +973,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
 }
 
 FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
-  CPDF_Object* pObject = ParseIndirectObjectAt(m_pDocument, *pos, 0);
+  CPDF_Object* pObject = ParseIndirectObjectAt(m_pDocument.get(), *pos, 0);
   if (!pObject)
     return FALSE;
 
@@ -1472,7 +1471,7 @@ CPDF_Dictionary* CPDF_Parser::LoadTrailerV4() {
     return nullptr;
 
   std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pObj(
-      m_pSyntax->GetObject(m_pDocument, 0, 0, true));
+      m_pSyntax->GetObject(m_pDocument.get(), 0, 0, true));
   if (!ToDictionary(pObj.get()))
     return nullptr;
   return pObj.release()->AsDictionary();
@@ -1559,7 +1558,7 @@ CPDF_Parser::Error CPDF_Parser::StartAsyncParse(IFX_FileRead* pFileAccess) {
     return StartParse(pFileAccess);
   }
 
-  m_pDocument = new CPDF_Document(this);
+  m_pDocument.reset(new CPDF_Document(this));
   FX_FILESIZE dwFirstXRefOffset = m_pSyntax->SavePos();
 
   FX_BOOL bXRefRebuilt = FALSE;
diff --git a/core/fpdfapi/fpdf_parser/include/cpdf_parser.h b/core/fpdfapi/fpdf_parser/include/cpdf_parser.h
index b468bead9d..1291180197 100644
--- a/core/fpdfapi/fpdf_parser/include/cpdf_parser.h
+++ b/core/fpdfapi/fpdf_parser/include/cpdf_parser.h
@@ -44,7 +44,7 @@ class CPDF_Parser {
   CFX_ByteString GetPassword() { return m_Password; }
   CPDF_Dictionary* GetTrailer() const { return m_pTrailer; }
   FX_FILESIZE GetLastXRefOffset() const { return m_LastXRefOffset; }
-  CPDF_Document* GetDocument() const { return m_pDocument; }
+  CPDF_Document* GetDocument() const { return m_pDocument.get(); }
 
   uint32_t GetRootObjNum();
   uint32_t GetInfoObjNum();
@@ -118,7 +118,7 @@ class CPDF_Parser {
   // the objects.
   bool VerifyCrossRefV4();
 
-  CPDF_Document* m_pDocument;
+  std::unique_ptr<CPDF_Document> m_pDocument;
   std::unique_ptr<CPDF_SyntaxParser> m_pSyntax;
   bool m_bOwnFileRead;
   int m_FileVersion;
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_image.cpp b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
index b9826a9338..0ea4a17684 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
@@ -326,29 +326,26 @@ void CPDF_DIBTransferFunc::TranslateDownSamples(uint8_t* dest_buf,
 #endif
   }
 }
+
 CPDF_ImageRenderer::CPDF_ImageRenderer() {
   m_pRenderStatus = nullptr;
   m_pImageObject = nullptr;
   m_Result = TRUE;
   m_Status = 0;
-  m_pTransformer = nullptr;
   m_DeviceHandle = nullptr;
-  m_LoadHandle = nullptr;
-  m_pClone = nullptr;
   m_bStdCS = FALSE;
   m_bPatternColor = FALSE;
   m_BlendType = FXDIB_BLEND_NORMAL;
   m_pPattern = nullptr;
   m_pObj2Device = nullptr;
 }
+
 CPDF_ImageRenderer::~CPDF_ImageRenderer() {
-  delete m_pTransformer;
   if (m_DeviceHandle) {
     m_pRenderStatus->m_pDevice->CancelDIBits(m_DeviceHandle);
   }
-  delete m_LoadHandle;
-  delete m_pClone;
 }
+
 FX_BOOL CPDF_ImageRenderer::StartLoadDIBSource() {
   CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
   FX_RECT image_rect = image_rect_f.GetOutterRect();
@@ -361,7 +358,7 @@ FX_BOOL CPDF_ImageRenderer::StartLoadDIBSource() {
     dest_height = -dest_height;
   }
   if (m_Loader.Start(m_pImageObject,
-                     m_pRenderStatus->m_pContext->GetPageCache(), m_LoadHandle,
+                     m_pRenderStatus->m_pContext->GetPageCache(), &m_LoadHandle,
                      m_bStdCS, m_pRenderStatus->m_GroupFamily,
                      m_pRenderStatus->m_bLoadMask, m_pRenderStatus, dest_width,
                      dest_height)) {
@@ -372,6 +369,7 @@ FX_BOOL CPDF_ImageRenderer::StartLoadDIBSource() {
   }
   return FALSE;
 }
+
 FX_BOOL CPDF_ImageRenderer::StartRenderDIBSource() {
   if (!m_Loader.m_pBitmap) {
     return FALSE;
@@ -416,10 +414,10 @@ FX_BOOL CPDF_ImageRenderer::StartRenderDIBSource() {
     }
     m_FillArgb = m_pRenderStatus->GetFillArgb(m_pImageObject);
   } else if (m_pRenderStatus->m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
-    m_pClone = m_pDIBSource->Clone();
+    m_pClone.reset(m_pDIBSource->Clone());
     m_pClone->ConvertColorScale(m_pRenderStatus->m_Options.m_BackColor,
                                 m_pRenderStatus->m_Options.m_ForeColor);
-    m_pDIBSource = m_pClone;
+    m_pDIBSource = m_pClone.get();
   }
   m_Flags = 0;
   if (m_pRenderStatus->m_Options.m_Flags & RENDER_FORCE_DOWNSAMPLE) {
@@ -488,6 +486,7 @@ FX_BOOL CPDF_ImageRenderer::StartRenderDIBSource() {
   }
   return StartDIBSource();
 }
+
 FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
                                   const CPDF_PageObject* pObj,
                                   const CFX_Matrix* pObj2Device,
@@ -510,6 +509,7 @@ FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
   }
   return StartRenderDIBSource();
 }
+
 FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
                                   const CFX_DIBSource* pDIBSource,
                                   FX_ARGB bitmap_argb,
@@ -528,6 +528,7 @@ FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
   m_BlendType = blendType;
   return StartDIBSource();
 }
+
 FX_BOOL CPDF_ImageRenderer::DrawPatternImage(const CFX_Matrix* pObj2Device) {
   if (m_pRenderStatus->m_bPrint &&
       !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
@@ -773,8 +774,8 @@ FX_BOOL CPDF_ImageRenderer::StartDIBSource() {
     FX_RECT clip_box = m_pRenderStatus->m_pDevice->GetClipBox();
     clip_box.Intersect(image_rect);
     m_Status = 2;
-    m_pTransformer = new CFX_ImageTransformer(m_pDIBSource, &m_ImageMatrix,
-                                              m_Flags, &clip_box);
+    m_pTransformer.reset(new CFX_ImageTransformer(m_pDIBSource, &m_ImageMatrix,
+                                                  m_Flags, &clip_box));
     m_pTransformer->Start();
     return TRUE;
   }
@@ -896,7 +897,7 @@ FX_BOOL CPDF_ImageRenderer::Continue(IFX_Pause* pPause) {
     return m_pRenderStatus->m_pDevice->ContinueDIBits(m_DeviceHandle, pPause);
 
   if (m_Status == 4) {
-    if (m_Loader.Continue(m_LoadHandle, pPause))
+    if (m_Loader.Continue(m_LoadHandle.get(), pPause))
       return TRUE;
 
     if (StartRenderDIBSource())
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 2b829d0c56..91574345d3 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -1548,21 +1548,22 @@ FX_BOOL CPDF_ImageLoaderHandle::Continue(IFX_Pause* pPause) {
   return ret;
 }
 
-FX_BOOL CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
-                                CPDF_PageRenderCache* pCache,
-                                CPDF_ImageLoaderHandle*& LoadHandle,
-                                FX_BOOL bStdCS,
-                                uint32_t GroupFamily,
-                                FX_BOOL bLoadMask,
-                                CPDF_RenderStatus* pRenderStatus,
-                                int32_t nDownsampleWidth,
-                                int32_t nDownsampleHeight) {
+FX_BOOL CPDF_ImageLoader::Start(
+    const CPDF_ImageObject* pImage,
+    CPDF_PageRenderCache* pCache,
+    std::unique_ptr<CPDF_ImageLoaderHandle>* pLoadHandle,
+    FX_BOOL bStdCS,
+    uint32_t GroupFamily,
+    FX_BOOL bLoadMask,
+    CPDF_RenderStatus* pRenderStatus,
+    int32_t nDownsampleWidth,
+    int32_t nDownsampleHeight) {
   m_nDownsampleWidth = nDownsampleWidth;
   m_nDownsampleHeight = nDownsampleHeight;
-  LoadHandle = new CPDF_ImageLoaderHandle;
-  return LoadHandle->Start(this, pImage, pCache, bStdCS, GroupFamily, bLoadMask,
-                           pRenderStatus, m_nDownsampleWidth,
-                           m_nDownsampleHeight);
+  pLoadHandle->reset(new CPDF_ImageLoaderHandle);
+  return (*pLoadHandle)
+      ->Start(this, pImage, pCache, bStdCS, GroupFamily, bLoadMask,
+              pRenderStatus, m_nDownsampleWidth, m_nDownsampleHeight);
 }
 
 FX_BOOL CPDF_ImageLoader::Continue(CPDF_ImageLoaderHandle* LoadHandle,
diff --git a/core/fpdfapi/fpdf_render/render_int.h b/core/fpdfapi/fpdf_render/render_int.h
index d86a62ab19..99d1dfc292 100644
--- a/core/fpdfapi/fpdf_render/render_int.h
+++ b/core/fpdfapi/fpdf_render/render_int.h
@@ -293,7 +293,7 @@ class CPDF_ImageLoader {
 
   FX_BOOL Start(const CPDF_ImageObject* pImage,
                 CPDF_PageRenderCache* pCache,
-                CPDF_ImageLoaderHandle*& LoadHandle,
+                std::unique_ptr<CPDF_ImageLoaderHandle>* pLoadHandle,
                 FX_BOOL bStdCS = FALSE,
                 uint32_t GroupFamily = 0,
                 FX_BOOL bLoadMask = FALSE,
@@ -373,15 +373,15 @@ class CPDF_ImageRenderer {
   CFX_Matrix m_ImageMatrix;
   CPDF_ImageLoader m_Loader;
   const CFX_DIBSource* m_pDIBSource;
-  CFX_DIBitmap* m_pClone;
+  std::unique_ptr<CFX_DIBitmap> m_pClone;
   int m_BitmapAlpha;
   FX_BOOL m_bPatternColor;
   CPDF_Pattern* m_pPattern;
   FX_ARGB m_FillArgb;
   uint32_t m_Flags;
-  CFX_ImageTransformer* m_pTransformer;
+  std::unique_ptr<CFX_ImageTransformer> m_pTransformer;
   void* m_DeviceHandle;
-  CPDF_ImageLoaderHandle* m_LoadHandle;
+  std::unique_ptr<CPDF_ImageLoaderHandle> m_LoadHandle;
   FX_BOOL m_bStdCS;
   int m_BlendType;
 };
diff --git a/core/fpdfdoc/cpdf_variabletext.cpp b/core/fpdfdoc/cpdf_variabletext.cpp
index 010d426cf2..1ac36ade86 100644
--- a/core/fpdfdoc/cpdf_variabletext.cpp
+++ b/core/fpdfdoc/cpdf_variabletext.cpp
@@ -264,9 +264,9 @@ void CPDF_VariableText::Initialize() {
   if (!m_bInitial) {
     CPVT_SectionInfo secinfo;
     if (m_bRichText) {
-      secinfo.pSecProps = new CPVT_SecProps(0.0f, 0.0f, 0);
-      secinfo.pWordProps = new CPVT_WordProps(
-          GetDefaultFontIndex(), kDefaultFontSize, 0, ScriptType::Normal, 0);
+      secinfo.pSecProps.reset(new CPVT_SecProps(0.0f, 0.0f, 0));
+      secinfo.pWordProps.reset(new CPVT_WordProps(
+          GetDefaultFontIndex(), kDefaultFontSize, 0, ScriptType::Normal, 0));
     }
     CPVT_WordPlace place;
     place.nSecIndex = 0;
@@ -333,9 +333,9 @@ CPVT_WordPlace CPDF_VariableText::InsertSection(
     CPVT_SectionInfo secinfo;
     if (m_bRichText) {
       if (pSecProps)
-        secinfo.pSecProps = new CPVT_SecProps(*pSecProps);
+        secinfo.pSecProps.reset(new CPVT_SecProps(*pSecProps));
       if (pWordProps)
-        secinfo.pWordProps = new CPVT_WordProps(*pWordProps);
+        secinfo.pWordProps.reset(new CPVT_WordProps(*pWordProps));
     }
     AddSection(NewPlace, secinfo);
     newplace = NewPlace;
@@ -426,9 +426,9 @@ void CPDF_VariableText::SetText(const FX_WCHAR* text,
   CPVT_SectionInfo secinfo;
   if (m_bRichText) {
     if (pSecProps)
-      secinfo.pSecProps = new CPVT_SecProps(*pSecProps);
+      secinfo.pSecProps.reset(new CPVT_SecProps(*pSecProps));
     if (pWordProps)
-      secinfo.pWordProps = new CPVT_WordProps(*pWordProps);
+      secinfo.pWordProps.reset(new CPVT_WordProps(*pWordProps));
   }
   if (CSection* pSection = m_SectionArray.GetAt(0))
     pSection->m_SecInfo = secinfo;
diff --git a/core/fpdfdoc/cpvt_sectioninfo.cpp b/core/fpdfdoc/cpvt_sectioninfo.cpp
new file mode 100644
index 0000000000..eb5c1bb809
--- /dev/null
+++ b/core/fpdfdoc/cpvt_sectioninfo.cpp
@@ -0,0 +1,31 @@
+// Copyright 2016 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 "core/fpdfdoc/cpvt_sectioninfo.h"
+
+CPVT_SectionInfo::CPVT_SectionInfo() : rcSection(), nTotalLine(0) {}
+
+CPVT_SectionInfo::~CPVT_SectionInfo() {}
+
+CPVT_SectionInfo::CPVT_SectionInfo(const CPVT_SectionInfo& other) {
+  operator=(other);
+}
+
+void CPVT_SectionInfo::operator=(const CPVT_SectionInfo& other) {
+  if (this == &other)
+    return;
+
+  rcSection = other.rcSection;
+  nTotalLine = other.nTotalLine;
+  if (other.pSecProps)
+    pSecProps.reset(new CPVT_SecProps(*other.pSecProps));
+  else
+    pSecProps.reset();
+  if (other.pWordProps)
+    pWordProps.reset(new CPVT_WordProps(*other.pWordProps));
+  else
+    pWordProps.reset();
+}
diff --git a/core/fpdfdoc/cpvt_sectioninfo.h b/core/fpdfdoc/cpvt_sectioninfo.h
index e466ae5006..9d9b99fc27 100644
--- a/core/fpdfdoc/cpvt_sectioninfo.h
+++ b/core/fpdfdoc/cpvt_sectioninfo.h
@@ -7,48 +7,23 @@
 #ifndef CORE_FPDFDOC_CPVT_SECTIONINFO_H_
 #define CORE_FPDFDOC_CPVT_SECTIONINFO_H_
 
+#include <memory>
+
 #include "core/fpdfdoc/cpvt_floatrect.h"
 #include "core/fpdfdoc/include/cpvt_secprops.h"
 #include "core/fpdfdoc/include/cpvt_wordprops.h"
 
 struct CPVT_SectionInfo {
-  CPVT_SectionInfo()
-      : rcSection(), nTotalLine(0), pSecProps(nullptr), pWordProps(nullptr) {}
-
-  ~CPVT_SectionInfo() {
-    delete pSecProps;
-    delete pWordProps;
-  }
-
-  CPVT_SectionInfo(const CPVT_SectionInfo& other)
-      : rcSection(), nTotalLine(0), pSecProps(nullptr), pWordProps(nullptr) {
-    operator=(other);
-  }
-
-  void operator=(const CPVT_SectionInfo& other) {
-    if (this == &other)
-      return;
-
-    rcSection = other.rcSection;
-    nTotalLine = other.nTotalLine;
-    if (other.pSecProps) {
-      if (pSecProps)
-        *pSecProps = *other.pSecProps;
-      else
-        pSecProps = new CPVT_SecProps(*other.pSecProps);
-    }
-    if (other.pWordProps) {
-      if (pWordProps)
-        *pWordProps = *other.pWordProps;
-      else
-        pWordProps = new CPVT_WordProps(*other.pWordProps);
-    }
-  }
+  CPVT_SectionInfo();
+  CPVT_SectionInfo(const CPVT_SectionInfo& other);
+  ~CPVT_SectionInfo();
+
+  void operator=(const CPVT_SectionInfo& other);
 
   CPVT_FloatRect rcSection;
   int32_t nTotalLine;
-  CPVT_SecProps* pSecProps;
-  CPVT_WordProps* pWordProps;
+  std::unique_ptr<CPVT_SecProps> pSecProps;
+  std::unique_ptr<CPVT_WordProps> pWordProps;
 };
 
 #endif  // CORE_FPDFDOC_CPVT_SECTIONINFO_H_
diff --git a/core/fpdfdoc/cpvt_wordinfo.cpp b/core/fpdfdoc/cpvt_wordinfo.cpp
new file mode 100644
index 0000000000..2303f30032
--- /dev/null
+++ b/core/fpdfdoc/cpvt_wordinfo.cpp
@@ -0,0 +1,54 @@
+// Copyright 2016 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 "core/fpdfdoc/cpvt_wordinfo.h"
+
+CPVT_WordInfo::CPVT_WordInfo()
+    : Word(0),
+      nCharset(FXFONT_ANSI_CHARSET),
+      fWordX(0.0f),
+      fWordY(0.0f),
+      fWordTail(0.0f),
+      nFontIndex(-1) {}
+
+CPVT_WordInfo::CPVT_WordInfo(uint16_t word,
+                             int32_t charset,
+                             int32_t fontIndex,
+                             CPVT_WordProps* pProps)
+    : Word(word),
+      nCharset(charset),
+      fWordX(0.0f),
+      fWordY(0.0f),
+      fWordTail(0.0f),
+      nFontIndex(fontIndex) {}
+
+CPVT_WordInfo::CPVT_WordInfo(const CPVT_WordInfo& word)
+    : Word(0),
+      nCharset(FXFONT_ANSI_CHARSET),
+      fWordX(0.0f),
+      fWordY(0.0f),
+      fWordTail(0.0f),
+      nFontIndex(-1) {
+  operator=(word);
+}
+
+CPVT_WordInfo::~CPVT_WordInfo() {}
+
+void CPVT_WordInfo::operator=(const CPVT_WordInfo& word) {
+  if (this == &word)
+    return;
+
+  Word = word.Word;
+  nCharset = word.nCharset;
+  nFontIndex = word.nFontIndex;
+  fWordX = word.fWordX;
+  fWordY = word.fWordY;
+  fWordTail = word.fWordTail;
+  if (word.pWordProps)
+    pWordProps.reset(new CPVT_WordProps(*word.pWordProps));
+  else
+    pWordProps.reset();
+}
diff --git a/core/fpdfdoc/cpvt_wordinfo.h b/core/fpdfdoc/cpvt_wordinfo.h
index 1ab0df21af..c690e2aa7b 100644
--- a/core/fpdfdoc/cpvt_wordinfo.h
+++ b/core/fpdfdoc/cpvt_wordinfo.h
@@ -7,58 +7,21 @@
 #ifndef CORE_FPDFDOC_CPVT_WORDINFO_H_
 #define CORE_FPDFDOC_CPVT_WORDINFO_H_
 
+#include <memory>
+
 #include "core/fpdfdoc/include/cpvt_wordprops.h"
 #include "core/fxcrt/include/fx_system.h"
 
 struct CPVT_WordInfo {
-  CPVT_WordInfo()
-      : Word(0),
-        nCharset(FXFONT_ANSI_CHARSET),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(-1),
-        pWordProps(nullptr) {}
-
+  CPVT_WordInfo();
   CPVT_WordInfo(uint16_t word,
                 int32_t charset,
                 int32_t fontIndex,
-                CPVT_WordProps* pProps)
-      : Word(word),
-        nCharset(charset),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(fontIndex),
-        pWordProps(pProps) {}
-
-  CPVT_WordInfo(const CPVT_WordInfo& word)
-      : Word(0),
-        nCharset(FXFONT_ANSI_CHARSET),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(-1),
-        pWordProps(nullptr) {
-    operator=(word);
-  }
-
-  ~CPVT_WordInfo() { delete pWordProps; }
-
-  void operator=(const CPVT_WordInfo& word) {
-    if (this == &word)
-      return;
+                CPVT_WordProps* pProps);
+  CPVT_WordInfo(const CPVT_WordInfo& word);
+  ~CPVT_WordInfo();
 
-    Word = word.Word;
-    nCharset = word.nCharset;
-    nFontIndex = word.nFontIndex;
-    if (word.pWordProps) {
-      if (pWordProps)
-        *pWordProps = *word.pWordProps;
-      else
-        pWordProps = new CPVT_WordProps(*word.pWordProps);
-    }
-  }
+  void operator=(const CPVT_WordInfo& word);
 
   uint16_t Word;
   int32_t nCharset;
@@ -66,7 +29,7 @@ struct CPVT_WordInfo {
   FX_FLOAT fWordY;
   FX_FLOAT fWordTail;
   int32_t nFontIndex;
-  CPVT_WordProps* pWordProps;
+  std::unique_ptr<CPVT_WordProps> pWordProps;
 };
 
 #endif  // CORE_FPDFDOC_CPVT_WORDINFO_H_
diff --git a/core/fpdfdoc/doc_annot.cpp b/core/fpdfdoc/doc_annot.cpp
index 9b2f9e505f..fe17e9c811 100644
--- a/core/fpdfdoc/doc_annot.cpp
+++ b/core/fpdfdoc/doc_annot.cpp
@@ -41,7 +41,8 @@ CPDF_AnnotList::CPDF_AnnotList(CPDF_Page* pPage)
       pAnnots->RemoveAt(i + 1);
       pDict = pAnnots->GetDictAt(i);
     }
-    m_AnnotList.push_back(new CPDF_Annot(pDict, this));
+    m_AnnotList.push_back(
+        std::unique_ptr<CPDF_Annot>(new CPDF_Annot(pDict, this)));
     if (bRegenerateAP && pDict->GetStringBy("Subtype") == "Widget" &&
         CPDF_InterForm::UpdatingAPEnabled()) {
       FPDF_GenerateAP(m_pDocument, pDict);
@@ -49,10 +50,7 @@ CPDF_AnnotList::CPDF_AnnotList(CPDF_Page* pPage)
   }
 }
 
-CPDF_AnnotList::~CPDF_AnnotList() {
-  for (CPDF_Annot* annot : m_AnnotList)
-    delete annot;
-}
+CPDF_AnnotList::~CPDF_AnnotList() {}
 
 void CPDF_AnnotList::DisplayPass(CPDF_Page* pPage,
                                  CFX_RenderDevice* pDevice,
@@ -62,7 +60,7 @@ void CPDF_AnnotList::DisplayPass(CPDF_Page* pPage,
                                  FX_BOOL bWidgetPass,
                                  CPDF_RenderOptions* pOptions,
                                  FX_RECT* clip_rect) {
-  for (CPDF_Annot* pAnnot : m_AnnotList) {
+  for (const auto& pAnnot : m_AnnotList) {
     bool bWidget = pAnnot->GetSubType() == "Widget";
     if ((bWidgetPass && !bWidget) || (!bWidgetPass && bWidget))
       continue;
diff --git a/core/fpdfdoc/include/fpdf_doc.h b/core/fpdfdoc/include/fpdf_doc.h
index afa5a30b18..be52a1b829 100644
--- a/core/fpdfdoc/include/fpdf_doc.h
+++ b/core/fpdfdoc/include/fpdf_doc.h
@@ -374,8 +374,10 @@ class CPDF_AnnotList {
                      CPDF_RenderOptions* pOptions,
                      FX_RECT* pClipRect);
   size_t Count() const { return m_AnnotList.size(); }
-  CPDF_Annot* GetAt(size_t index) const { return m_AnnotList[index]; }
-  const std::vector<CPDF_Annot*>& All() const { return m_AnnotList; }
+  CPDF_Annot* GetAt(size_t index) const { return m_AnnotList[index].get(); }
+  const std::vector<std::unique_ptr<CPDF_Annot>>& All() const {
+    return m_AnnotList;
+  }
   CPDF_Document* GetDocument() const { return m_pDocument; }
 
  protected:
@@ -389,7 +391,7 @@ class CPDF_AnnotList {
                    FX_RECT* clip_rect);
 
   CPDF_Document* const m_pDocument;
-  std::vector<CPDF_Annot*> m_AnnotList;
+  std::vector<std::unique_ptr<CPDF_Annot>> m_AnnotList;
 };
 
 #define COLORTYPE_TRANSPARENT 0