Connect the right metafiles for print preview on Linux and Windows.

chrome/renderer/print_web_view_helper_linux.cc

 // Copyright (c) 2011 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 "chrome/renderer/print_web_view_helper.h"
 
 #include "base/file_descriptor_posix.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/common/print_messages.h"
 #include "content/common/view_messages.h"
-#include "printing/native_metafile_factory.h"
-#include "printing/native_metafile_skia_wrapper.h"
-#include "printing/native_metafile.h"
+#include "printing/metafile.h"
+#include "printing/metafile_impl.h"
+#include "printing/metafile_skia_wrapper.h"
 #include "skia/ext/vector_canvas.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "ui/gfx/point.h"
 
 #if !defined(OS_CHROMEOS)
 #include "base/process_util.h"
 #endif  // !defined(OS_CHROMEOS)
 
 using WebKit::WebFrame;
 using WebKit::WebNode;
 
 void PrintWebViewHelper::CreatePreviewDocument(
     const PrintMsg_PrintPages_Params& params, WebKit::WebFrame* frame,
     WebKit::WebNode* node) {
-  // We only can use PDF in the renderer because Cairo needs to create a
-  // temporary file for a PostScript surface.
-  scoped_ptr<printing::NativeMetafile> metafile(
-      printing::NativeMetafileFactory::Create());
   int page_count = 0;
+  printing::PreviewMetafile metafile;
+  if (!metafile.Init())
+    return;
 
-  if (!RenderPages(params, frame, node, false, &page_count, metafile.get()))
+  if (!RenderPages(params, frame, node, false, &page_count, &metafile))
     return;
 
   // Get the size of the resulting metafile.
-  uint32 buf_size = metafile->GetDataSize();
+  uint32 buf_size = metafile.GetDataSize();
   DCHECK_GT(buf_size, 0u);
 
   PrintHostMsg_DidPreviewDocument_Params preview_params;
   preview_params.document_cookie = params.params.document_cookie;
   preview_params.expected_pages_count = page_count;
   preview_params.data_size = buf_size;
 
-  if (!CopyMetafileDataToSharedMem(metafile.get(),
+  if (!CopyMetafileDataToSharedMem(&metafile,
                                    &(preview_params.metafile_data_handle))) {
     preview_params.expected_pages_count = 0;
     preview_params.data_size = 0;
   }
   Send(new PrintHostMsg_PagesReadyForPreview(routing_id(), preview_params));
 }
 
 void PrintWebViewHelper::PrintPages(const PrintMsg_PrintPages_Params& params,
                                     WebFrame* frame,
                                     WebNode* node) {
-  // We only can use PDF in the renderer because Cairo needs to create a
-  // temporary file for a PostScript surface.
-  scoped_ptr<printing::NativeMetafile> metafile(
-      printing::NativeMetafileFactory::Create());
   int page_count = 0;
   bool send_expected_page_count =
 #if defined(OS_CHROMEOS)
       false;
 #else
       true;
 #endif  // defined(OS_CHROMEOS)
 
+  printing::NativeMetafile metafile;
+  if (!metafile.Init())
+    return;
+
   if (!RenderPages(params, frame, node, send_expected_page_count, &page_count,
-                   metafile.get())) {
+                   &metafile)) {
     return;
   }
 
   // Get the size of the resulting metafile.
-  uint32 buf_size = metafile->GetDataSize();
+  uint32 buf_size = metafile.GetDataSize();
   DCHECK_GT(buf_size, 0u);
 
 #if defined(OS_CHROMEOS)
   int sequence_number = -1;
   base::FileDescriptor fd;
 
   // Ask the browser to open a file for us.
   if (!Send(new PrintHostMsg_AllocateTempFileForPrinting(&fd,
                                                          &sequence_number))) {
     return;
   }
-  if (!metafile->SaveToFD(fd))
+  if (!metafile.SaveToFD(fd))
     return;
 
   // Tell the browser we've finished writing the file.
   Send(new PrintHostMsg_TempFileForPrintingWritten(sequence_number));
 #else
   PrintHostMsg_DidPrintPage_Params printed_page_params;
   printed_page_params.data_size = 0;
   printed_page_params.document_cookie = params.params.document_cookie;
 
   base::SharedMemoryHandle shared_mem_handle;
   if (!Send(new ViewHostMsg_AllocateSharedMemoryBuffer(buf_size,
                                                        &shared_mem_handle))) {
     NOTREACHED() << "AllocateSharedMemoryBuffer failed";
     return;
   }
   if (!base::SharedMemory::IsHandleValid(shared_mem_handle)) {
     NOTREACHED() << "AllocateSharedMemoryBuffer returned bad handle";
     return;
   }
 
   {
     base::SharedMemory shared_buf(shared_mem_handle, false);
     if (!shared_buf.Map(buf_size)) {
       NOTREACHED() << "Map failed";
       return;
     }
-    metafile->GetData(shared_buf.memory(), buf_size);
+    metafile.GetData(shared_buf.memory(), buf_size);
     printed_page_params.data_size = buf_size;
     shared_buf.GiveToProcess(base::GetCurrentProcessHandle(),
                              &(printed_page_params.metafile_data_handle));
   }
 
   if (params.pages.empty()) {
     // Send the first page with a valid handle.
     printed_page_params.page_number = 0;
     Send(new PrintHostMsg_DidPrintPage(routing_id(), printed_page_params));
 
@@ skipping 16 matching lines @@
     }
   }
 #endif  // defined(OS_CHROMEOS)
 }
 
 bool PrintWebViewHelper::RenderPages(const PrintMsg_PrintPages_Params& params,
                                      WebKit::WebFrame* frame,
                                      WebKit::WebNode* node,
                                      bool send_expected_page_count,
                                      int* page_count,
-                                     printing::NativeMetafile* metafile) {
+                                     printing::Metafile* metafile) {
   PrintMsg_Print_Params printParams = params.params;
   scoped_ptr<skia::VectorCanvas> canvas;
 
   {
     // Hack - when |prep_frame_view| goes out of scope, PrintEnd() gets called.
     // Doing this before closing |metafile| below ensures
     // webkit::ppapi::PluginInstance::PrintEnd() has a valid canvas/metafile to
     // save the final output to. See pepper_plugin_instance.cc for the whole
     // story.
     PrepareFrameAndViewForPrint prep_frame_view(printParams,
@@ skipping 27 matching lines @@
 
   metafile->FinishDocument();
 
   return true;
 }
 
 void PrintWebViewHelper::PrintPageInternal(
     const PrintMsg_PrintPage_Params& params,
     const gfx::Size& canvas_size,
     WebFrame* frame,
-    printing::NativeMetafile* metafile,
+    printing::Metafile* metafile,
     scoped_ptr<skia::VectorCanvas>* canvas) {
   double content_width_in_points;
   double content_height_in_points;
   double margin_top_in_points;
   double margin_right_in_points;
   double margin_bottom_in_points;
   double margin_left_in_points;
   GetPageSizeAndMarginsInPoints(frame,
                                 params.page_number,
                                 params.params,
@@ skipping 10 matching lines @@
       content_height_in_points + margin_top_in_points +
           margin_bottom_in_points);
   gfx::Point content_origin(margin_left_in_points, margin_top_in_points);
 
   skia::PlatformDevice* device = metafile->StartPageForVectorCanvas(
       page_size, content_origin, 1.0f);
   if (!device)
     return;
 
   canvas->reset(new skia::VectorCanvas(device));
-  printing::NativeMetafileSkiaWrapper::SetMetafileOnCanvas(canvas->get(),
-                                                           metafile);
+  printing::MetafileSkiaWrapper::SetMetafileOnCanvas(canvas->get(), metafile);
   frame->printPage(params.page_number, canvas->get());
 
   // TODO(myhuang): We should handle transformation for paper margins.
   // TODO(myhuang): We should render the header and the footer.
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   if (!metafile->FinishPage())
     NOTREACHED() << "metafile failed";
 }