Splitting fpdfdoc/doc_* part I

core/fpdfdoc/doc_viewerPreferences.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/fpdfdoc/include/cpdf_viewerpreferences.h"
-
-#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
-
-CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
-    : m_pDoc(pDoc) {}
-
-CPDF_ViewerPreferences::~CPDF_ViewerPreferences() {}
-
-FX_BOOL CPDF_ViewerPreferences::IsDirectionR2L() const {
-  CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetStringBy("Direction") == "R2L" : FALSE;
-}
-
-FX_BOOL CPDF_ViewerPreferences::PrintScaling() const {
-  CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetStringBy("PrintScaling") != "None" : TRUE;
-}
-
-int32_t CPDF_ViewerPreferences::NumCopies() const {
-  CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetIntegerBy("NumCopies") : 1;
-}
-
-CPDF_Array* CPDF_ViewerPreferences::PrintPageRange() const {
-  CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetArrayBy("PrintPageRange") : nullptr;
-}
-
-CFX_ByteString CPDF_ViewerPreferences::Duplex() const {
-  CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetStringBy("Duplex") : CFX_ByteString("None");
-}
-
-CPDF_Dictionary* CPDF_ViewerPreferences::GetViewerPreferences() const {
-  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
-  return pDict ? pDict->GetDictBy("ViewerPreferences") : nullptr;
-}