Use smart pointers for class owned pointers

For all classes under /fpdfsdk, use smart pointer to replace
raw pointer type for class owned member variables so that memory
management will be easier.

BUG=pdfium:518

Review-Url: https://codereview.chromium.org/2173253002

4 files changed, 17 insertions, 23 deletions

diff --git a/fpdfsdk/pdfwindow/PWL_FontMap.cpp b/fpdfsdk/pdfwindow/PWL_FontMap.cpp
index 9192afd5e8..96acb78ec2 100644
--- a/fpdfsdk/pdfwindow/PWL_FontMap.cpp
+++ b/fpdfsdk/pdfwindow/PWL_FontMap.cpp
@@ -35,14 +35,11 @@ const char* const g_sDEStandardFontName[] = {"Courier",
 }  // namespace
 
 CPWL_FontMap::CPWL_FontMap(CFX_SystemHandler* pSystemHandler)
-    : m_pPDFDoc(nullptr), m_pSystemHandler(pSystemHandler) {
+    : m_pSystemHandler(pSystemHandler) {
   ASSERT(m_pSystemHandler);
 }
 
 CPWL_FontMap::~CPWL_FontMap() {
-  delete m_pPDFDoc;
-  m_pPDFDoc = nullptr;
-
   Empty();
 }
 
@@ -53,12 +50,12 @@ void CPWL_FontMap::SetSystemHandler(CFX_SystemHandler* pSystemHandler) {
 CPDF_Document* CPWL_FontMap::GetDocument() {
   if (!m_pPDFDoc) {
     if (CPDF_ModuleMgr::Get()) {
-      m_pPDFDoc = new CPDF_Document(nullptr);
+      m_pPDFDoc.reset(new CPDF_Document(nullptr));
       m_pPDFDoc->CreateNewDoc();
     }
   }
 
-  return m_pPDFDoc;
+  return m_pPDFDoc.get();
 }
 
 CPDF_Font* CPWL_FontMap::GetPDFFont(int32_t nFontIndex) {
@@ -413,7 +410,7 @@ int32_t CPWL_FontMap::GetNativeCharset() {
   return nCharset;
 }
 
-const CPWL_FontMap::CharsetFontMap CPWL_FontMap::defaultTTFMap[] = {
+const FPDF_CharsetFontMap CPWL_FontMap::defaultTTFMap[] = {
     {ANSI_CHARSET, "Helvetica"},      {GB2312_CHARSET, "SimSun"},
     {CHINESEBIG5_CHARSET, "MingLiU"}, {SHIFTJIS_CHARSET, "MS Gothic"},
     {HANGUL_CHARSET, "Batang"},       {RUSSIAN_CHARSET, "Arial"},
diff --git a/fpdfsdk/pdfwindow/PWL_FontMap.h b/fpdfsdk/pdfwindow/PWL_FontMap.h
index 2c40c92a97..7f347f5eb5 100644
--- a/fpdfsdk/pdfwindow/PWL_FontMap.h
+++ b/fpdfsdk/pdfwindow/PWL_FontMap.h
@@ -7,6 +7,8 @@
 #ifndef FPDFSDK_PDFWINDOW_PWL_FONTMAP_H_
 #define FPDFSDK_PDFWINDOW_PWL_FONTMAP_H_
 
+#include <memory>
+
 #include "core/fpdfdoc/include/ipvt_fontmap.h"
 #include "fpdfsdk/fxedit/include/fx_edit.h"
 #include "public/fpdf_sysfontinfo.h"
@@ -80,6 +82,8 @@ class CPWL_FontMap : public IPVT_FontMap {
                            CFX_ByteString& sFontName,
                            uint8_t nCharset);
 
+  static const FPDF_CharsetFontMap defaultTTFMap[];
+
  protected:
   virtual void Initialize();
   virtual CPDF_Document* GetDocument();
@@ -102,6 +106,9 @@ class CPWL_FontMap : public IPVT_FontMap {
                                  int32_t nCharset);
   CFX_ByteString EncodeFontAlias(const CFX_ByteString& sFontName);
 
+  CFX_ArrayTemplate<CPWL_FontMap_Data*> m_aData;
+  CFX_ArrayTemplate<CPWL_FontMap_Native*> m_aNativeFont;
+
  private:
   CFX_ByteString GetFontName(int32_t nFontIndex);
   int32_t FindFont(const CFX_ByteString& sFontName,
@@ -109,16 +116,7 @@ class CPWL_FontMap : public IPVT_FontMap {
 
   CFX_ByteString GetNativeFont(int32_t nCharset);
 
- public:
-  using CharsetFontMap = FPDF_CharsetFontMap;
-  static const CharsetFontMap defaultTTFMap[];
-
- protected:
-  CFX_ArrayTemplate<CPWL_FontMap_Data*> m_aData;
-  CFX_ArrayTemplate<CPWL_FontMap_Native*> m_aNativeFont;
-
- private:
-  CPDF_Document* m_pPDFDoc;
+  std::unique_ptr<CPDF_Document> m_pPDFDoc;
   CFX_SystemHandler* m_pSystemHandler;
 };
 
diff --git a/fpdfsdk/pdfwindow/PWL_Wnd.cpp b/fpdfsdk/pdfwindow/PWL_Wnd.cpp
index e680652bb3..4a479de0dc 100644
--- a/fpdfsdk/pdfwindow/PWL_Wnd.cpp
+++ b/fpdfsdk/pdfwindow/PWL_Wnd.cpp
@@ -80,15 +80,13 @@ void CPWL_Timer::TimerProc(int32_t idEvent) {
     pTimer->m_pAttached->TimerProc();
 }
 
-CPWL_TimerHandler::CPWL_TimerHandler() : m_pTimer(nullptr) {}
+CPWL_TimerHandler::CPWL_TimerHandler() {}
 
-CPWL_TimerHandler::~CPWL_TimerHandler() {
-  delete m_pTimer;
-}
+CPWL_TimerHandler::~CPWL_TimerHandler() {}
 
 void CPWL_TimerHandler::BeginTimer(int32_t nElapse) {
   if (!m_pTimer)
-    m_pTimer = new CPWL_Timer(this, GetSystemHandler());
+    m_pTimer.reset(new CPWL_Timer(this, GetSystemHandler()));
 
   if (m_pTimer)
     m_pTimer->SetPWLTimer(nElapse);
diff --git a/fpdfsdk/pdfwindow/PWL_Wnd.h b/fpdfsdk/pdfwindow/PWL_Wnd.h
index 3dfaf5afda..de48a8c82d 100644
--- a/fpdfsdk/pdfwindow/PWL_Wnd.h
+++ b/fpdfsdk/pdfwindow/PWL_Wnd.h
@@ -7,6 +7,7 @@
 #ifndef FPDFSDK_PDFWINDOW_PWL_WND_H_
 #define FPDFSDK_PDFWINDOW_PWL_WND_H_
 
+#include <memory>
 #include <vector>
 
 #include "core/fpdfdoc/include/cpdf_formcontrol.h"
@@ -238,7 +239,7 @@ class CPWL_TimerHandler {
   virtual CFX_SystemHandler* GetSystemHandler() const = 0;
 
  private:
-  CPWL_Timer* m_pTimer;
+  std::unique_ptr<CPWL_Timer> m_pTimer;
 };
 
 class CPWL_Wnd : public CPWL_TimerHandler {