Make FDF document creation return unique_ptrs

core/fpdfdoc/cpdf_interform.cpp

 // 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/cpdf_interform.h"
 
 #include <utility>
 #include <vector>
@@ skipping 1167 matching lines @@
       bFind = pdfium::ContainsValue(*fields, pField);
     if (bIncludeOrExclude == bFind) {
       CPDF_Dictionary* pFieldDict = pField->m_pDict;
       if ((dwFlags & 0x02) != 0 && pFieldDict->GetStringFor("V").IsEmpty())
         return pField;
     }
   }
   return nullptr;
 }
 
-CFDF_Document* CPDF_InterForm::ExportToFDF(const CFX_WideStringC& pdf_path,
-                                           bool bSimpleFileSpec) const {
+std::unique_ptr<CFDF_Document> CPDF_InterForm::ExportToFDF(
+    const CFX_WideStringC& pdf_path,
+    bool bSimpleFileSpec) const {
   std::vector<CPDF_FormField*> fields;
   size_t nCount = m_pFieldTree->m_Root.CountFields();
   for (size_t i = 0; i < nCount; ++i)
     fields.push_back(m_pFieldTree->m_Root.GetFieldAtIndex(i));
   return ExportToFDF(pdf_path, fields, true, bSimpleFileSpec);
 }
 
-CFDF_Document* CPDF_InterForm::ExportToFDF(
+std::unique_ptr<CFDF_Document> CPDF_InterForm::ExportToFDF(
     const CFX_WideStringC& pdf_path,
     const std::vector<CPDF_FormField*>& fields,
     bool bIncludeOrExclude,
     bool bSimpleFileSpec) const {
-  CFDF_Document* pDoc = CFDF_Document::CreateNewDoc();
+  std::unique_ptr<CFDF_Document> pDoc = CFDF_Document::CreateNewDoc();
   if (!pDoc)
     return nullptr;
 
   CPDF_Dictionary* pMainDict = pDoc->GetRoot()->GetDictFor("FDF");
   if (!pdf_path.IsEmpty()) {
     if (bSimpleFileSpec) {
       CFX_WideString wsFilePath = CPDF_FileSpec::EncodeFileName(pdf_path);
       pMainDict->SetNewFor<CPDF_String>(
           "F", CFX_ByteString::FromUnicode(wsFilePath), false);
       pMainDict->SetNewFor<CPDF_String>("UF", PDF_EncodeText(wsFilePath),
@@ skipping 96 matching lines @@
     else if (iType == FIELDTYPE_LISTBOX)
       m_pFormNotify->AfterSelectionChange(pField);
     else if (iType == FIELDTYPE_COMBOBOX || iType == FIELDTYPE_TEXTFIELD)
       m_pFormNotify->AfterValueChange(pField);
   }
 }
 
 void CPDF_InterForm::SetFormNotify(IPDF_FormNotify* pNotify) {
   m_pFormNotify = pNotify;
 }