Revert of Unify some code

core/fpdfapi/parser/cpdf_document.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 "core/fpdfapi/parser/cpdf_document.h"
 
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "core/fpdfapi/cpdf_modulemgr.h"
 #include "core/fpdfapi/font/cpdf_fontencoding.h"
 #include "core/fpdfapi/page/cpdf_docpagedata.h"
 #include "core/fpdfapi/page/cpdf_pagemodule.h"
 #include "core/fpdfapi/page/pageint.h"
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
-#include "core/fpdfapi/parser/cpdf_linearized.h"
 #include "core/fpdfapi/parser/cpdf_number.h"
 #include "core/fpdfapi/parser/cpdf_parser.h"
 #include "core/fpdfapi/parser/cpdf_reference.h"
 #include "core/fpdfapi/parser/cpdf_stream.h"
 #include "core/fpdfapi/render/render_int.h"
 #include "core/fxcodec/JBig2_DocumentContext.h"
 #include "core/fxge/cfx_unicodeencoding.h"
 #include "core/fxge/fx_font.h"
 #include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
@@ skipping 341 matching lines @@
   CPDF_Object* pInfoObj = GetOrParseIndirectObject(m_pParser->GetInfoObjNum());
   if (pInfoObj)
     m_pInfoDict = pInfoObj->GetDict();
 }
 
 void CPDF_Document::LoadDoc() {
   LoadDocInternal();
   m_PageList.SetSize(RetrievePageCount());
 }
 
-void CPDF_Document::LoadLinearizedDoc(
-    const CPDF_Linearized* pLinearizationParams) {
+void CPDF_Document::LoadLinearizedDoc(CPDF_Dictionary* pLinearizationParams) {
   m_bLinearized = true;
   LoadDocInternal();
-  m_PageList.SetSize(pLinearizationParams->GetPageCount());
-  m_iFirstPageNo = pLinearizationParams->GetFirstPageNo();
-  m_dwFirstPageObjNum = pLinearizationParams->GetFirstPageObjNum();
+
+  uint32_t dwPageCount = 0;
+  CPDF_Object* pCount = pLinearizationParams->GetObjectFor("N");
+  if (ToNumber(pCount))
+    dwPageCount = pCount->GetInteger();
+  m_PageList.SetSize(dwPageCount);
+
+  CPDF_Object* pNo = pLinearizationParams->GetObjectFor("P");
+  if (ToNumber(pNo))
+    m_iFirstPageNo = pNo->GetInteger();
+
+  CPDF_Object* pObjNum = pLinearizationParams->GetObjectFor("O");
+  if (ToNumber(pObjNum))
+    m_dwFirstPageObjNum = pObjNum->GetInteger();
 }
 
 void CPDF_Document::LoadPages() {
   m_PageList.SetSize(RetrievePageCount());
 }
 
 CPDF_Dictionary* CPDF_Document::TraversePDFPages(int iPage,
                                                  int* nPagesToGo,
                                                  size_t level) {
   if (*nPagesToGo < 0)
@@ skipping 637 matching lines @@
                         pBBox, pLogFont->lfWeight / 5);
   pFontDesc->SetIntegerFor("CapHeight", capheight);
   pFontDict->SetReferenceFor("FontDescriptor", this,
                              AddIndirectObject(pFontDesc));
   hFont = SelectObject(hDC, hFont);
   DeleteObject(hFont);
   DeleteDC(hDC);
   return LoadFont(pBaseDict);
 }
 #endif  //  _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_