Make concrete stream classes private to .cpp, part 3

xfa/fxfa/app/xfa_ffapp.cpp

 // Copyright 2014 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 "xfa/fxfa/xfa_ffapp.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "xfa/fgas/font/cfgas_fontmgr.h"
 #include "xfa/fwl/core/cfwl_notedriver.h"
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 #include "xfa/fxfa/app/xfa_fwladapter.h"
 #include "xfa/fxfa/app/xfa_fwltheme.h"
 #include "xfa/fxfa/xfa_ffdoc.h"
 #include "xfa/fxfa/xfa_ffdochandler.h"
 #include "xfa/fxfa/xfa_ffwidgethandler.h"
 #include "xfa/fxfa/xfa_fontmgr.h"
 
+namespace {
+
+class CXFA_FileRead : public IFX_SeekableReadStream {
+ public:
+  explicit CXFA_FileRead(const std::vector<CPDF_Stream*>& streams);
+  ~CXFA_FileRead() override;
+
+  // IFX_SeekableReadStream
+  FX_FILESIZE GetSize() override;
+  bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
+  void Release() override;
+
+ private:
+  CFX_ObjectArray<CPDF_StreamAcc> m_Data;
+};
+
 CXFA_FileRead::CXFA_FileRead(const std::vector<CPDF_Stream*>& streams) {
   for (CPDF_Stream* pStream : streams) {
     CPDF_StreamAcc& acc = m_Data.Add();
     acc.LoadAllData(pStream);
   }
 }
 
 CXFA_FileRead::~CXFA_FileRead() {}
 
 FX_FILESIZE CXFA_FileRead::GetSize() {
@@ skipping 31 matching lines @@
     offset = 0;
     index++;
   }
   return false;
 }
 
 void CXFA_FileRead::Release() {
   delete this;
 }
 
+}  // namespace
+
+IFX_SeekableReadStream* MakeSeekableReadStream(
+    const std::vector<CPDF_Stream*>& streams) {
+  return new CXFA_FileRead(streams);
+}
+
 CXFA_FFApp::CXFA_FFApp(IXFA_AppProvider* pProvider)
     : m_pProvider(pProvider),
       m_pWidgetMgrDelegate(nullptr),
       m_pFWLApp(new CFWL_App(this)) {}
 
 CXFA_FFApp::~CXFA_FFApp() {}
 
 CXFA_FFDocHandler* CXFA_FFApp::GetDocHandler() {
   if (!m_pDocHandler)
     m_pDocHandler.reset(new CXFA_FFDocHandler);
@@ skipping 56 matching lines @@
   return m_pAdapterWidgetMgr.get();
 }
 
 IFWL_AdapterTimerMgr* CXFA_FFApp::GetTimerMgr() const {
   return m_pProvider->GetTimerMgr();
 }
 
 void CXFA_FFApp::ClearEventTargets() {
   m_pFWLApp->GetNoteDriver()->ClearEventTargets(false);
 }