Print directly to CUPS using the IPP APIs

printing/backend/cups_ipp_util.cc

 // Copyright 2016 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 "printing/backend/cups_ipp_util.h"
 
 #include <cups/cups.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "printing/backend/cups_printer.h"
 #include "printing/backend/print_backend_consts.h"
 #include "printing/units.h"
 
 namespace printing {
 
-namespace {
-
+// property names
 const char kIppCollate[] = "sheet-collate";  // RFC 3381
 const char kIppCopies[] = CUPS_COPIES;
 const char kIppColor[] = CUPS_PRINT_COLOR_MODE;
 const char kIppMedia[] = CUPS_MEDIA;
 const char kIppDuplex[] = CUPS_SIDES;
 
+// collation values
 const char kCollated[] = "collated";
+const char kUncollated[] = "uncollated";
+
+namespace {
 
 const int kMicronsPerMM = 1000;
 const double kMMPerInch = 25.4;
 const double kMicronsPerInch = kMMPerInch * kMicronsPerMM;
 
 enum Unit {
   INCHES,
   MILLIMETERS,
 };
 
@@ skipping 245 matching lines @@
   printer_info->default_paper = DefaultPaper(printer);
   printer_info->papers = SupportedPapers(printer);
 
   ExtractCopies(printer, printer_info);
   ExtractColor(printer, printer_info);
 
   // TODO(skau): Add dpi and default_dpi
 }
 
 }  //  namespace printing