Implement FPDF_VIEWERREF_GetName() API.

core/fpdfdoc/cpdf_viewerpreferences.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_viewerpreferences.h"
 
 #include "core/fpdfapi/parser/cpdf_document.h"
+#include "core/fpdfapi/parser/cpdf_name.h"
 
 CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
     : m_pDoc(pDoc) {}
 
 CPDF_ViewerPreferences::~CPDF_ViewerPreferences() {}
 
 bool CPDF_ViewerPreferences::IsDirectionR2L() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
   return pDict ? pDict->GetStringFor("Direction") == "R2L" : false;
 }
@@ skipping 11 matching lines @@
 CPDF_Array* CPDF_ViewerPreferences::PrintPageRange() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
   return pDict ? pDict->GetArrayFor("PrintPageRange") : nullptr;
 }
 
 CFX_ByteString CPDF_ViewerPreferences::Duplex() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
   return pDict ? pDict->GetStringFor("Duplex") : CFX_ByteString("None");
 }
 
+bool CPDF_ViewerPreferences::GenericName(const CFX_ByteString& bsKey,
+                                         CFX_ByteString* bsVal) const {
+  ASSERT(bsVal);
+  CPDF_Dictionary* pDict = GetViewerPreferences();
+  if (!pDict)
+    return false;
+
+  const CPDF_Name* pName = ToName(pDict->GetObjectFor(bsKey));
+  if (!pName)
+    return false;
+
+  *bsVal = pName->GetString();
+  return true;
+}
+
 CPDF_Dictionary* CPDF_ViewerPreferences::GetViewerPreferences() const {
   CPDF_Dictionary* pDict = m_pDoc->GetRoot();
   return pDict ? pDict->GetDictFor("ViewerPreferences") : nullptr;
 }