Wrapers for PRINTER_INFO_* and DRIVER_INFO_*.

printing/backend/printing_info_win.h

+// 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.
+
+#ifndef PRINTING_BACKEND_PRINTING_INFO_WIN_H_
+#define PRINTING_BACKEND_PRINTING_INFO_WIN_H_
+
+#include <objidl.h>
+#include <winspool.h>
+
+#include "base/memory/scoped_ptr.h"
+#include "printing/printing_export.h"
+
+namespace printing {
+
+namespace internal {
+
+PRINTING_EXPORT uint8* GetDriverInfo(HANDLE printer, int level);
+PRINTING_EXPORT uint8* GetPrinterInfo(HANDLE printer, int level);
+
+// This class is designed to work with PRINTER_INFO_X structures
+// and calls GetPrinter internally with correctly allocated buffer.
+template <typename PrinterInfoType, int level>
+class PrinterInfo {
+ public:
+  bool Init(HANDLE printer) {
+    buffer_.reset(GetPrinterInfo(printer, level));
+    return buffer_;
+  }
+
+  const PrinterInfoType* get() const {
+    return reinterpret_cast<const PrinterInfoType*>(buffer_.get());
+  }
+
+ private:
+  scoped_array<uint8> buffer_;
+};
+
+// This class is designed to work with DRIVER_INFO_X structures
+// and calls GetDriverInfo internally with correctly allocated buffer.
+template <typename DriverInfoType, int level>
+class DriverInfo {
+ public:
+  bool Init(HANDLE printer) {
+    buffer_.reset(GetDriverInfo(printer, level));
+    return buffer_;
+  }
+
+  const DriverInfoType* get() const {
+    return reinterpret_cast<const DriverInfoType*>(buffer_.get());
+  }
+
+ private:
+  scoped_array<uint8> buffer_;
+};
+
+}  // namespace internal
+
+typedef internal::PrinterInfo<PRINTER_INFO_2, 2> PrinterInfo2;
+typedef internal::PrinterInfo<PRINTER_INFO_5, 5> PrinterInfo5;
+typedef internal::PrinterInfo<PRINTER_INFO_8, 8> PrinterInfo8;
+typedef internal::PrinterInfo<PRINTER_INFO_9, 9> PrinterInfo9;
+
+typedef internal::DriverInfo<DRIVER_INFO_6, 6> DriverInfo6;
+
+// Retrieves DEVMODE from PRINTER_INFO_* structures.
+// Requests in following order:
+//    9 (user-default),
+//    8 (admin-default),
+//    2 (printer-default).
+class PRINTING_EXPORT DevMode {

[gene, 2012/12/11 18:03:31]

This class name is confusing. It sounds like a wrapper around DEVMODE which it
is not. Call it UserPrinterSettings or just create a simple function, something
like DEVMODE* GetUserDevMode(HANDLE printer).

[Vitaly Buka (NO REVIEWS), 2012/12/11 19:24:24]

Done.

+ public:
+  DevMode();
+  ~DevMode();
+
+  bool Init(HANDLE printer);
+
+  const DEVMODE* get() const {
+    return dev_mode_;
+  }
+
+ private:
+  PrinterInfo2 info_2_;
+  PrinterInfo8 info_8_;
+  PrinterInfo9 info_9_;
+  const DEVMODE* dev_mode_;
+};
+
+}  // namespace printing
+
+#endif  // PRINTING_BACKEND_PRINTING_INFO_WIN_H_