Add support to extract viewer preference

core/src/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 "../../include/fpdfdoc/fpdf_doc.h"
 CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document *pDoc): m_pDoc(pDoc)
 {
 }
@@ skipping 11 matching lines @@
 }
 FX_BOOL CPDF_ViewerPreferences::PrintScaling() const
 {
     CPDF_Dictionary *pDict = m_pDoc->GetRoot();
     pDict = pDict->GetDict(FX_BSTRC("ViewerPreferences"));
     if (!pDict) {
         return TRUE;
     }
     return FX_BSTRC("None") != pDict->GetString(FX_BSTRC("PrintScaling"));
 }
+FX_INT32 CPDF_ViewerPreferences::NumCopies() const
+{
+    CPDF_Dictionary *pDict = m_pDoc->GetRoot();
+    pDict = pDict->GetDict(FX_BSTRC("ViewerPreferences"));
+    if (!pDict) {
+        return FALSE;
+    }
+    return pDict->GetInteger(FX_BSTRC("NumCopies"));
+}
+CPDF_Array* CPDF_ViewerPreferences::PrintPageRange() const
+{
+    CPDF_Dictionary *pDict = m_pDoc->GetRoot();
+    CPDF_Array *pRange = NULL;
+    pDict = pDict->GetDict(FX_BSTRC("ViewerPreferences"));
+    if (!pDict) {
+        return pRange;
+    }
+    pRange = pDict->GetArray(FX_BSTRC("PrintPageRange"));
+    return pRange;
+}
+FX_INT32 CPDF_ViewerPreferences::Duplex() const

[Bo Xu, 2014/06/29 20:58:16]

This function should return a CFX_ByteString like "Simplex".

Then leave the ( ? == ?) part to fpdfview.cpp, so you can define the enum there.

The design of foxit "core" and "fpdfsdk" was to try to return the raw data from
"core" and process it in "fpdfsdk".

[Nikhil, 2014/07/07 08:54:18]

Done.

+{
+    CPDF_Dictionary *pDict = m_pDoc->GetRoot();
+    CFX_ByteString duplex;
+    DuplexType type;

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

no need "type" variable.

[Nikhil, 2014/06/26 10:21:38]

Done.

+    pDict = pDict->GetDict(FX_BSTRC("ViewerPreferences"));
+    if (!pDict) {
+        return type;
+    }
+
+    // Extract and map Duplex property.
+    duplex = pDict->GetString(FX_BSTRC("Duplex"));
+    if (FX_BSTRC("None") == duplex)
+        type = None;

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

return immediatly

[Nikhil, 2014/06/26 10:21:38]

Done.

+    if (FX_BSTRC("Simplex") == duplex)
+        type = Simplex;
+    if (FX_BSTRC("DuplexFlipShortEdge") == duplex)
+        type = DuplexFlipShortEdge;
+    if (FX_BSTRC("DuplexFlipLongEdge") == duplex)
+        type = DuplexFlipLongEdge;
+
+    return type;
+}