Split printing utility IPC messages into its own file.

chrome/utility/printing_handler.h

+// Copyright 2014 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 CHROME_UTILITY_PRINTING_HANDLER_H_
+#define CHROME_UTILITY_PRINTING_HANDLER_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "chrome/utility/utility_message_handler.h"
+#include "ipc/ipc_platform_file.h"
+
+#if !defined(ENABLE_FULL_PRINTING)
+#error "Full printing must be enabled"
+#endif
+
+namespace printing {
+class PdfRenderSettings;
+struct PwgRasterSettings;
+struct PageRange;
+}
+
+// Dispatches IPCs for printing.
+class PrintingHandler : public UtilityMessageHandler {
+ public:
+  PrintingHandler();
+  virtual ~PrintingHandler();
+
+  static void PreSandboxStartup();
+
+  // IPC::Listener:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ private:
+  // IPC message handlers.
+#if defined(WIN_PDF_METAFILE_FOR_PRINTING)
+  void OnRenderPDFPagesToMetafile(
+      IPC::PlatformFileForTransit pdf_transit,
+      const base::FilePath& metafile_path,
+      const printing::PdfRenderSettings& settings,
+      const std::vector<printing::PageRange>& page_ranges);
+#endif
+  void OnRenderPDFPagesToPWGRaster(
+      IPC::PlatformFileForTransit pdf_transit,
+      const printing::PdfRenderSettings& settings,
+      const printing::PwgRasterSettings& bitmap_settings,
+      IPC::PlatformFileForTransit bitmap_transit);
+
+#if defined(WIN_PDF_METAFILE_FOR_PRINTING)
+  // Helper method for Windows.
+  // |highest_rendered_page_number| is set to -1 on failure to render any page.
+  // |page_ranges| is both input and output. If supplied as input, only the
+  // specified pages will be rendered. If an empty vector is supplied it will
+  // be filled with a range of all pages that were rendered.
+  bool RenderPDFToWinMetafile(
+      base::File pdf_file,
+      const base::FilePath& metafile_path,
+      const printing::PdfRenderSettings& settings,
+      std::vector<printing::PageRange>* page_ranges,
+      int* highest_rendered_page_number,
+      double* scale_factor);
+#endif
+
+  bool RenderPDFPagesToPWGRaster(
+      base::File pdf_file,
+      const printing::PdfRenderSettings& settings,
+      const printing::PwgRasterSettings& bitmap_settings,
+      base::File bitmap_file);
+
+  void OnGetPrinterCapsAndDefaults(const std::string& printer_name);
+  void OnGetPrinterSemanticCapsAndDefaults(const std::string& printer_name);
+
+  DISALLOW_COPY_AND_ASSIGN(PrintingHandler);
+};
+
+#endif  // CHROME_UTILITY_PRINTING_HANDLER_H_