Convert printing IPCs to Mojo

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 "build/build_config.h"
-#include "chrome/utility/utility_message_handler.h"
+#include "components/printing/common/printing.mojom.h"
 #include "ipc/ipc_platform_file.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
 #include "printing/features/features.h"
 #include "printing/pdf_render_settings.h"
 
 #if !BUILDFLAG(ENABLE_PRINT_PREVIEW) && \
     !(BUILDFLAG(ENABLE_BASIC_PRINTING) && defined(OS_WIN))
 #error "Windows basic printing or print preview must be enabled"
 #endif
 
 namespace printing {
 
 struct PwgRasterSettings;
 
 // Dispatches IPCs for printing.
-class PrintingHandler : public UtilityMessageHandler {
+class PrintingHandler : public mojom::Printing {
  public:
-  PrintingHandler();
+  explicit PrintingHandler(mojom::FontPreCachingPtr font_pre_caching);
   ~PrintingHandler() override;
 
-  // IPC::Listener:
-  bool OnMessageReceived(const IPC::Message& message) override;
+  static void Create(mojom::PrintingFactoryRequest request);
 
  private:
-  // IPC message handlers.
-#if defined(OS_WIN)
-  void OnRenderPDFPagesToMetafile(IPC::PlatformFileForTransit pdf_transit,
-                                  const PdfRenderSettings& settings,
-                                  bool print_text_with_gdi);
-  void OnRenderPDFPagesToMetafileGetPage(
+  class PrintingHandlerFactory : public mojom::PrintingFactory {
+   public:
+    // mojom::PrintingFactory:
+    void MakePrinting(mojom::PrintingRequest request,
+                      mojom::FontPreCachingPtr font_pre_caching) override;
+  };
+
+  // mojom::Printing:
+  void RenderPDFPagesToMetafiles(
+      base::File pdf_file,
+      const PdfRenderSettings& settings,
+      bool print_text_with_gdi,
+      const RenderPDFPagesToMetafilesCallback& callback) override;
+  void RenderPDFPagesToMetafilesGetPage(
       int page_number,
-      IPC::PlatformFileForTransit output_file);
-  void OnRenderPDFPagesToMetafileStop();
-#endif  // OS_WIN
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
-  void OnRenderPDFPagesToPWGRaster(IPC::PlatformFileForTransit pdf_transit,
-                                   const PdfRenderSettings& settings,
-                                   const PwgRasterSettings& bitmap_settings,
-                                   IPC::PlatformFileForTransit bitmap_transit);
-#endif  // ENABLE_PRINT_PREVIEW
+      base::File emf_file,
+      const RenderPDFPagesToMetafilesGetPageCallback& callback) override;
+  void RenderPDFPagesToPWGRaster(
+      base::File pdf,
+      const PdfRenderSettings& settings,
+      const PwgRasterSettings& bitmap_settings,
+      base::File bitmap,
+      const RenderPDFPagesToPWGRasterCallback& callback) override;
+
+  // Called when the Mojo connection is closed. Causes the utility process to
+  // stop conversion and exit.
+  void OnConnectionClosed();
 
 #if defined(OS_WIN)
   int LoadPDF(base::File pdf_file);
   bool RenderPdfPageToMetafile(int page_number,
                                base::File output_file,
                                float* scale_factor);
 #endif  // OS_WIN
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   bool RenderPDFPagesToPWGRaster(base::File pdf_file,
                                  const PdfRenderSettings& settings,
                                  const PwgRasterSettings& bitmap_settings,
                                  base::File bitmap_file);
+#endif  // ENABLE_PRINT_PREVIEW
 
-  void OnGetPrinterCapsAndDefaults(const std::string& printer_name);
-  void OnGetPrinterSemanticCapsAndDefaults(const std::string& printer_name);
-#endif  // ENABLE_PRINT_PREVIEW
+  // mojom::Printing:
+  void GetPrinterCapsAndDefaults(
+      const std::string& printer_name,
+      const GetPrinterCapsAndDefaultsCallback& callback) override;
+  void GetPrinterSemanticCapsAndDefaults(
+      const std::string& printer_name,
+      const GetPrinterSemanticCapsAndDefaultsCallback& callback) override;
 
 #if defined(OS_WIN)
   std::vector<char> pdf_data_;
   PdfRenderSettings pdf_rendering_settings_;
 #endif
 
+  mojom::FontPreCachingPtr font_pre_caching_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintingHandler);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_UTILITY_PRINTING_HANDLER_H_