Print directly to CUPS using the IPP APIs

printing/printing_context_chromeos.h

Index: printing/printing_context_chromeos.h
diff --git a/printing/printing_context_no_system_dialog.h b/printing/printing_context_chromeos.h
similarity index 57%
copy from printing/printing_context_no_system_dialog.h
copy to printing/printing_context_chromeos.h
index 79a0ddfa54db6e961f66ca9d532d21aaa6f33786..a5883cb99cecaf06b88db8279d818bf9f2b00536 100644
--- a/printing/printing_context_no_system_dialog.h
+++ b/printing/printing_context_chromeos.h
@@ -1,13 +1,17 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_
-#define PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_
+#ifndef PRINTING_PRINTING_CONTEXT_CHROMEOS_H_
+#define PRINTING_PRINTING_CONTEXT_CHROMEOS_H_
 
+#include <memory>
 #include <string>
+#include <vector>
 
 #include "base/macros.h"
+#include "printing/backend/cups_connection.h"
+#include "printing/backend/cups_printer.h"
 #include "printing/printing_context.h"
 
 namespace base {
@@ -16,10 +20,10 @@ class DictionaryValue;
 
 namespace printing {
 
-class PRINTING_EXPORT PrintingContextNoSystemDialog : public PrintingContext {
+class PRINTING_EXPORT PrintingContextChromeos : public PrintingContext {
  public:
-  explicit PrintingContextNoSystemDialog(Delegate* delegate);
-  ~PrintingContextNoSystemDialog() override;
+  explicit PrintingContextChromeos(Delegate* delegate);
+  ~PrintingContextChromeos() override;
 
   // PrintingContext implementation.
   void AskUserForSettings(int max_pages,
@@ -40,10 +44,21 @@ class PRINTING_EXPORT PrintingContextNoSystemDialog : public PrintingContext {
   void ReleaseContext() override;
   gfx::NativeDrawingContext context() const override;
 
+  Result StreamData(const std::vector<char>& buffer);
+
  private:
-  DISALLOW_COPY_AND_ASSIGN(PrintingContextNoSystemDialog);
+  // Lazily initializes |printer_|.
+  Result InitializeDevice(const std::string& device);
+
+  // id for ongoing print job.  -1 if no job is active.

[Lei Zhang, 2016/07/25 21:06:04]

printing_context_chromeos.cc checks for 0, what is 0?

[skau, 2016/07/27 00:16:47]

If the createDestJob fails, job_id is set to 0.  I'll just use 0 for everything
since they shouldn't need differentiation and I appear to have forgotten anyway.

+  int job_id_;
+
+  CupsConnection connection_;
+  std::unique_ptr<CupsPrinter> printer_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrintingContextChromeos);
 };
 
 }  // namespace printing
 
-#endif  // PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_
+#endif  // PRINTING_PRINTING_CONTEXT_CHROMEOS_H_