Use more unique_ptrs in CPDF_Image.

Do the same in CPDF_TextObject.
Discover CPDF_PageObject::Clone() is unnecessary and remove it.

Review-Url: https://codereview.chromium.org/2517163003

16 files changed, 9 insertions, 86 deletions

diff --git a/core/fpdfapi/page/cpdf_clippath.cpp b/core/fpdfapi/page/cpdf_clippath.cpp
index 465a1c7997..cfcd9a1e64 100644
--- a/core/fpdfapi/page/cpdf_clippath.cpp
+++ b/core/fpdfapi/page/cpdf_clippath.cpp
@@ -123,7 +123,7 @@ CPDF_ClipPath::PathData::PathData(const PathData& that) {
   m_TextList.resize(that.m_TextList.size());
   for (size_t i = 0; i < that.m_TextList.size(); ++i) {
     if (that.m_TextList[i])
-      m_TextList[i].reset(that.m_TextList[i]->Clone());
+      m_TextList[i] = that.m_TextList[i]->Clone();
   }
 }
 
diff --git a/core/fpdfapi/page/cpdf_form.cpp b/core/fpdfapi/page/cpdf_form.cpp
index 18b9fdd94b..7291c88191 100644
--- a/core/fpdfapi/page/cpdf_form.cpp
+++ b/core/fpdfapi/page/cpdf_form.cpp
@@ -50,12 +50,3 @@ void CPDF_Form::ParseContent(CPDF_AllStates* pGraphicStates,
   StartParse(pGraphicStates, pParentMatrix, pType3Char, level);
   ContinueParse(nullptr);
 }
-
-CPDF_Form* CPDF_Form::Clone() const {
-  CPDF_Form* pCloneForm =
-      new CPDF_Form(m_pDocument, m_pPageResources, m_pFormStream, m_pResources);
-  for (const auto& pObj : m_PageObjectList)
-    pCloneForm->m_PageObjectList.emplace_back(pObj->Clone());
-
-  return pCloneForm;
-}
diff --git a/core/fpdfapi/page/cpdf_form.h b/core/fpdfapi/page/cpdf_form.h
index 1208e327bd..910f38fd08 100644
--- a/core/fpdfapi/page/cpdf_form.h
+++ b/core/fpdfapi/page/cpdf_form.h
@@ -29,8 +29,6 @@ class CPDF_Form : public CPDF_PageObjectHolder {
                     CPDF_Type3Char* pType3Char,
                     int level = 0);
 
-  CPDF_Form* Clone() const;
-
  private:
   void StartParse(CPDF_AllStates* pGraphicStates,
                   const CFX_Matrix* pParentMatrix,
diff --git a/core/fpdfapi/page/cpdf_formobject.cpp b/core/fpdfapi/page/cpdf_formobject.cpp
index dd3c2c2036..dc596e53c6 100644
--- a/core/fpdfapi/page/cpdf_formobject.cpp
+++ b/core/fpdfapi/page/cpdf_formobject.cpp
@@ -29,15 +29,6 @@ const CPDF_FormObject* CPDF_FormObject::AsForm() const {
   return this;
 }
 
-CPDF_FormObject* CPDF_FormObject::Clone() const {
-  CPDF_FormObject* obj = new CPDF_FormObject;
-  obj->CopyData(this);
-
-  obj->m_pForm.reset(m_pForm->Clone());
-  obj->m_FormMatrix = m_FormMatrix;
-  return obj;
-}
-
 CPDF_PageObject::Type CPDF_FormObject::GetType() const {
   return FORM;
 }
diff --git a/core/fpdfapi/page/cpdf_formobject.h b/core/fpdfapi/page/cpdf_formobject.h
index 0fdc692019..b13cb5fbe4 100644
--- a/core/fpdfapi/page/cpdf_formobject.h
+++ b/core/fpdfapi/page/cpdf_formobject.h
@@ -20,7 +20,6 @@ class CPDF_FormObject : public CPDF_PageObject {
   ~CPDF_FormObject() override;
 
   // CPDF_PageObject:
-  CPDF_FormObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& matrix) override;
   bool IsForm() const override;
diff --git a/core/fpdfapi/page/cpdf_image.cpp b/core/fpdfapi/page/cpdf_image.cpp
index dafca2b764..8a5faa6d0a 100644
--- a/core/fpdfapi/page/cpdf_image.cpp
+++ b/core/fpdfapi/page/cpdf_image.cpp
@@ -61,24 +61,6 @@ void CPDF_Image::FinishInitialization() {
   m_Width = m_pDict->GetIntegerFor("Width");
 }
 
-CPDF_Image* CPDF_Image::Clone() {
-  CPDF_Image* pImage = new CPDF_Image(m_pDocument);
-  pImage->m_bIsInline = m_bIsInline;
-  if (m_pOwnedStream) {
-    pImage->m_pOwnedStream = ToStream(m_pOwnedStream->Clone());
-    pImage->m_pStream = pImage->m_pOwnedStream.get();
-  } else {
-    pImage->m_pStream = m_pStream;
-  }
-  if (m_pOwnedDict) {
-    pImage->m_pOwnedDict = ToDictionary(m_pOwnedDict->Clone());
-    pImage->m_pDict = pImage->m_pOwnedDict.get();
-  } else {
-    pImage->m_pDict = m_pDict;
-  }
-  return pImage;
-}
-
 void CPDF_Image::ConvertStreamToIndirectObject() {
   if (!m_pStream->IsInline())
     return;
@@ -329,7 +311,7 @@ CFX_DIBSource* CPDF_Image::LoadDIBSource(CFX_DIBSource** ppMask,
                                          bool bStdCS,
                                          uint32_t GroupFamily,
                                          bool bLoadMask) const {
-  std::unique_ptr<CPDF_DIBSource> source(new CPDF_DIBSource);
+  auto source = pdfium::MakeUnique<CPDF_DIBSource>();
   if (source->Load(m_pDocument, m_pStream,
                    reinterpret_cast<CPDF_DIBSource**>(ppMask), pMatteColor,
                    nullptr, nullptr, bStdCS, GroupFamily, bLoadMask)) {
@@ -355,7 +337,7 @@ bool CPDF_Image::StartLoadDIBSource(CPDF_Dictionary* pFormResource,
                                     bool bStdCS,
                                     uint32_t GroupFamily,
                                     bool bLoadMask) {
-  std::unique_ptr<CPDF_DIBSource> source(new CPDF_DIBSource);
+  auto source = pdfium::MakeUnique<CPDF_DIBSource>();
   int ret =
       source->StartLoadDIBSource(m_pDocument, m_pStream, true, pFormResource,
                                  pPageResource, bStdCS, GroupFamily, bLoadMask);
diff --git a/core/fpdfapi/page/cpdf_image.h b/core/fpdfapi/page/cpdf_image.h
index 1491efe1c6..3438e2b98e 100644
--- a/core/fpdfapi/page/cpdf_image.h
+++ b/core/fpdfapi/page/cpdf_image.h
@@ -26,7 +26,6 @@ class CPDF_Image {
   CPDF_Image(CPDF_Document* pDoc, uint32_t dwStreamObjNum);
   ~CPDF_Image();
 
-  CPDF_Image* Clone();
   void ConvertStreamToIndirectObject();
 
   CPDF_Dictionary* GetInlineDict() const { return m_pDict; }
diff --git a/core/fpdfapi/page/cpdf_imageobject.cpp b/core/fpdfapi/page/cpdf_imageobject.cpp
index 2893c525b1..bb91820548 100644
--- a/core/fpdfapi/page/cpdf_imageobject.cpp
+++ b/core/fpdfapi/page/cpdf_imageobject.cpp
@@ -19,15 +19,6 @@ CPDF_ImageObject::~CPDF_ImageObject() {
   Release();
 }
 
-CPDF_ImageObject* CPDF_ImageObject::Clone() const {
-  CPDF_ImageObject* obj = new CPDF_ImageObject;
-  obj->CopyData(this);
-
-  obj->m_pImage = m_pImage->Clone();
-  obj->m_Matrix = m_Matrix;
-  return obj;
-}
-
 CPDF_PageObject::Type CPDF_ImageObject::GetType() const {
   return IMAGE;
 }
diff --git a/core/fpdfapi/page/cpdf_imageobject.h b/core/fpdfapi/page/cpdf_imageobject.h
index 2bb1e8233d..1bbfc0509c 100644
--- a/core/fpdfapi/page/cpdf_imageobject.h
+++ b/core/fpdfapi/page/cpdf_imageobject.h
@@ -20,7 +20,6 @@ class CPDF_ImageObject : public CPDF_PageObject {
   ~CPDF_ImageObject() override;
 
   // CPDF_PageObject
-  CPDF_ImageObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& matrix) override;
   bool IsImage() const override;
diff --git a/core/fpdfapi/page/cpdf_pageobject.h b/core/fpdfapi/page/cpdf_pageobject.h
index 97cac7e9aa..ffc59f4eee 100644
--- a/core/fpdfapi/page/cpdf_pageobject.h
+++ b/core/fpdfapi/page/cpdf_pageobject.h
@@ -31,7 +31,6 @@ class CPDF_PageObject : public CPDF_GraphicStates {
   CPDF_PageObject();
   ~CPDF_PageObject() override;
 
-  virtual CPDF_PageObject* Clone() const = 0;
   virtual Type GetType() const = 0;
   virtual void Transform(const CFX_Matrix& matrix) = 0;
   virtual bool IsText() const;
diff --git a/core/fpdfapi/page/cpdf_pathobject.cpp b/core/fpdfapi/page/cpdf_pathobject.cpp
index a25f7891a6..27c4535fa5 100644
--- a/core/fpdfapi/page/cpdf_pathobject.cpp
+++ b/core/fpdfapi/page/cpdf_pathobject.cpp
@@ -10,17 +10,6 @@ CPDF_PathObject::CPDF_PathObject() {}
 
 CPDF_PathObject::~CPDF_PathObject() {}
 
-CPDF_PathObject* CPDF_PathObject::Clone() const {
-  CPDF_PathObject* obj = new CPDF_PathObject;
-  obj->CopyData(this);
-
-  obj->m_Path = m_Path;
-  obj->m_FillType = m_FillType;
-  obj->m_bStroke = m_bStroke;
-  obj->m_Matrix = m_Matrix;
-  return obj;
-}
-
 CPDF_PageObject::Type CPDF_PathObject::GetType() const {
   return PATH;
 }
diff --git a/core/fpdfapi/page/cpdf_pathobject.h b/core/fpdfapi/page/cpdf_pathobject.h
index d5ce5c0d02..58499b5a53 100644
--- a/core/fpdfapi/page/cpdf_pathobject.h
+++ b/core/fpdfapi/page/cpdf_pathobject.h
@@ -18,7 +18,6 @@ class CPDF_PathObject : public CPDF_PageObject {
   ~CPDF_PathObject() override;
 
   // CPDF_PageObject
-  CPDF_PathObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& maxtrix) override;
   bool IsPath() const override;
diff --git a/core/fpdfapi/page/cpdf_shadingobject.cpp b/core/fpdfapi/page/cpdf_shadingobject.cpp
index 84b6aa7cd5..928b0af47e 100644
--- a/core/fpdfapi/page/cpdf_shadingobject.cpp
+++ b/core/fpdfapi/page/cpdf_shadingobject.cpp
@@ -14,22 +14,6 @@ CPDF_ShadingObject::CPDF_ShadingObject() : m_pShading(nullptr) {}
 
 CPDF_ShadingObject::~CPDF_ShadingObject() {}
 
-CPDF_ShadingObject* CPDF_ShadingObject::Clone() const {
-  CPDF_ShadingObject* obj = new CPDF_ShadingObject;
-  obj->CopyData(this);
-
-  obj->m_pShading = m_pShading;
-  if (obj->m_pShading && obj->m_pShading->document()) {
-    CPDF_DocPageData* pDocPageData = obj->m_pShading->document()->GetPageData();
-    CPDF_Pattern* pattern = pDocPageData->GetPattern(
-        obj->m_pShading->GetShadingObject(), m_pShading->IsShadingObject(),
-        obj->m_pShading->parent_matrix());
-    obj->m_pShading = pattern ? pattern->AsShadingPattern() : nullptr;
-  }
-  obj->m_Matrix = m_Matrix;
-  return obj;
-}
-
 CPDF_PageObject::Type CPDF_ShadingObject::GetType() const {
   return SHADING;
 }
diff --git a/core/fpdfapi/page/cpdf_shadingobject.h b/core/fpdfapi/page/cpdf_shadingobject.h
index ed5679a83b..ffd622379e 100644
--- a/core/fpdfapi/page/cpdf_shadingobject.h
+++ b/core/fpdfapi/page/cpdf_shadingobject.h
@@ -18,7 +18,6 @@ class CPDF_ShadingObject : public CPDF_PageObject {
   ~CPDF_ShadingObject() override;
 
   // CPDF_PageObject
-  CPDF_ShadingObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& matrix) override;
   bool IsShading() const override;
diff --git a/core/fpdfapi/page/cpdf_textobject.cpp b/core/fpdfapi/page/cpdf_textobject.cpp
index d5a2ea6d29..0979fcfb33 100644
--- a/core/fpdfapi/page/cpdf_textobject.cpp
+++ b/core/fpdfapi/page/cpdf_textobject.cpp
@@ -8,6 +8,7 @@
 
 #include "core/fpdfapi/font/cpdf_cidfont.h"
 #include "core/fpdfapi/font/cpdf_font.h"
+#include "third_party/base/ptr_util.h"
 
 CPDF_TextObject::CPDF_TextObject()
     : m_PosX(0),
@@ -109,8 +110,8 @@ void CPDF_TextObject::GetCharInfo(int index, CPDF_TextObjectItem* pInfo) const {
   }
 }
 
-CPDF_TextObject* CPDF_TextObject::Clone() const {
-  CPDF_TextObject* obj = new CPDF_TextObject;
+std::unique_ptr<CPDF_TextObject> CPDF_TextObject::Clone() const {
+  auto obj = pdfium::MakeUnique<CPDF_TextObject>();
   obj->CopyData(this);
 
   obj->m_nChars = m_nChars;
diff --git a/core/fpdfapi/page/cpdf_textobject.h b/core/fpdfapi/page/cpdf_textobject.h
index 23da997aeb..b520e3ee92 100644
--- a/core/fpdfapi/page/cpdf_textobject.h
+++ b/core/fpdfapi/page/cpdf_textobject.h
@@ -7,6 +7,8 @@
 #ifndef CORE_FPDFAPI_PAGE_CPDF_TEXTOBJECT_H_
 #define CORE_FPDFAPI_PAGE_CPDF_TEXTOBJECT_H_
 
+#include <memory>
+
 #include "core/fpdfapi/page/cpdf_pageobject.h"
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
@@ -23,13 +25,13 @@ class CPDF_TextObject : public CPDF_PageObject {
   ~CPDF_TextObject() override;
 
   // CPDF_PageObject
-  CPDF_TextObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& matrix) override;
   bool IsText() const override;
   CPDF_TextObject* AsText() override;
   const CPDF_TextObject* AsText() const override;
 
+  std::unique_ptr<CPDF_TextObject> Clone() const;
   int CountItems() const;
   void GetItemInfo(int index, CPDF_TextObjectItem* pInfo) const;
   int CountChars() const;