Print Preview: Support the duplex preset in PDFs.

pdf/pdfium/pdfium_engine.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 2448 matching lines @@
 }
 
 bool PDFiumEngine::GetPrintScaling() {
   return !!FPDF_VIEWERREF_GetPrintScaling(doc_);
 }
 
 int PDFiumEngine::GetCopiesToPrint() {
   return FPDF_VIEWERREF_GetNumCopies(doc_);
 }
 
+int PDFiumEngine::GetDuplexType() {
+  return static_cast<int>(FPDF_VIEWERREF_GetDuplex(doc_));
+}
+
 void PDFiumEngine::AppendBlankPages(int num_pages) {
   DCHECK(num_pages != 0);
 
   if (!doc_)
     return;
 
   selection_.clear();
   pending_pages_.clear();
 
   // Delete all pages except the first one.
@@ skipping 1520 matching lines @@
     double* height) {
   FPDF_DOCUMENT doc = FPDF_LoadMemDocument(pdf_buffer, pdf_buffer_size, NULL);
   if (!doc)
     return false;
   bool success = FPDF_GetPageSizeByIndex(doc, page_number, width, height) != 0;
   FPDF_CloseDocument(doc);
   return success;
 }
 
 }  // namespace chrome_pdf