Refactor webview to use //components/printing

android_webview/renderer/print_web_view_helper_linux.cc

-// Copyright 2013 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.
-
-// TODO(sgurun) copied from chrome/renderer. Remove after crbug.com/322276
-
-#include "android_webview/renderer/print_web_view_helper.h"
-
-#include "android_webview/common/print_messages.h"
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "content/public/renderer/render_thread.h"
-#include "printing/metafile_skia_wrapper.h"
-#include "printing/page_size_margins.h"
-#include "printing/pdf_metafile_skia.h"
-#include "skia/ext/platform_device.h"
-#include "skia/ext/vector_canvas.h"
-#include "third_party/WebKit/public/web/WebLocalFrame.h"
-
-#if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
-#include "base/process/process_handle.h"
-#else
-#include "base/file_descriptor_posix.h"
-#endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
-
-namespace printing {
-
-using blink::WebFrame;
-
-bool PrintWebViewHelper::RenderPreviewPage(
-    int page_number,
-    const PrintMsg_Print_Params& print_params) {
-  PrintMsg_PrintPage_Params page_params;
-  page_params.params = print_params;
-  page_params.page_number = page_number;
-  scoped_ptr<PdfMetafileSkia> draft_metafile;
-  PdfMetafileSkia* initial_render_metafile = print_preview_context_.metafile();
-  if (print_preview_context_.IsModifiable() && is_print_ready_metafile_sent_) {
-    draft_metafile.reset(new PdfMetafileSkia);
-    initial_render_metafile = draft_metafile.get();
-  }
-
-  base::TimeTicks begin_time = base::TimeTicks::Now();
-  PrintPageInternal(page_params,
-                    print_preview_context_.GetPrintCanvasSize(),
-                    print_preview_context_.prepared_frame(),
-                    initial_render_metafile);
-  print_preview_context_.RenderedPreviewPage(
-      base::TimeTicks::Now() - begin_time);
-  if (draft_metafile.get()) {
-    draft_metafile->FinishDocument();
-  } else if (print_preview_context_.IsModifiable() &&
-             print_preview_context_.generate_draft_pages()) {
-    DCHECK(!draft_metafile.get());
-    draft_metafile =
-        print_preview_context_.metafile()->GetMetafileForCurrentPage();
-  }
-  return PreviewPageRendered(page_number, draft_metafile.get());
-}
-
-bool PrintWebViewHelper::PrintPagesNative(blink::WebFrame* frame,
-                                          int page_count,
-                                          const gfx::Size& canvas_size) {
-  PdfMetafileSkia metafile;
-  if (!metafile.Init())
-    return false;
-
-  const PrintMsg_PrintPages_Params& params = *print_pages_params_;
-  std::vector<int> printed_pages;
-
-  if (params.pages.empty()) {
-    for (int i = 0; i < page_count; ++i) {
-      printed_pages.push_back(i);
-    }
-  } else {
-    // TODO(vitalybuka): redesign to make more code cross platform.
-    for (size_t i = 0; i < params.pages.size(); ++i) {
-      if (params.pages[i] >= 0 && params.pages[i] < page_count) {
-        printed_pages.push_back(params.pages[i]);
-      }
-    }
-  }
-
-  if (printed_pages.empty())
-    return false;
-
-  PrintMsg_PrintPage_Params page_params;
-  page_params.params = params.params;
-  for (size_t i = 0; i < printed_pages.size(); ++i) {
-    page_params.page_number = printed_pages[i];
-    PrintPageInternal(page_params, canvas_size, frame, &metafile);
-  }
-
-  // blink::printEnd() for PDF should be called before metafile is closed.
-  FinishFramePrinting();
-
-  metafile.FinishDocument();
-
-  // Get the size of the resulting metafile.
-  uint32 buf_size = metafile.GetDataSize();
-  DCHECK_GT(buf_size, 0u);
-
-#if defined(OS_CHROMEOS) || defined(OS_ANDROID)
-  int sequence_number = -1;
-  base::FileDescriptor fd;
-
-  // Ask the browser to open a file for us.
-  Send(new PrintHostMsg_AllocateTempFileForPrinting(routing_id(),
-                                                    &fd,
-                                                    &sequence_number));
-  if (!metafile.SaveToFD(fd))
-    return false;
-
-  // Tell the browser we've finished writing the file.
-  Send(new PrintHostMsg_TempFileForPrintingWritten(routing_id(),
-                                                   sequence_number));
-  return true;
-#else
-  PrintHostMsg_DidPrintPage_Params printed_page_params;
-  printed_page_params.data_size = 0;
-  printed_page_params.document_cookie = params.params.document_cookie;
-
-  {
-    scoped_ptr<base::SharedMemory> shared_mem(
-        content::RenderThread::Get()->HostAllocateSharedMemoryBuffer(
-            buf_size).release());
-    if (!shared_mem.get()) {
-      NOTREACHED() << "AllocateSharedMemoryBuffer failed";
-      return false;
-    }
-
-    if (!shared_mem->Map(buf_size)) {
-      NOTREACHED() << "Map failed";
-      return false;
-    }
-    metafile.GetData(shared_mem->memory(), buf_size);
-    printed_page_params.data_size = buf_size;
-    shared_mem->GiveToProcess(base::GetCurrentProcessHandle(),
-                              &(printed_page_params.metafile_data_handle));
-  }
-
-  for (size_t i = 0; i < printed_pages.size(); ++i) {
-    printed_page_params.page_number = printed_pages[i];
-    Send(new PrintHostMsg_DidPrintPage(routing_id(), printed_page_params));
-    // Send the rest of the pages with an invalid metafile handle.
-    printed_page_params.metafile_data_handle.fd = -1;
-  }
-  return true;
-#endif  // defined(OS_CHROMEOS) || defined(OS_ANDROID)
-}
-
-void PrintWebViewHelper::PrintPageInternal(
-    const PrintMsg_PrintPage_Params& params,
-    const gfx::Size& canvas_size,
-    WebFrame* frame,
-    PdfMetafileSkia* metafile) {
-  PageSizeMargins page_layout_in_points;
-  double scale_factor = 1.0f;
-  ComputePageLayoutInPointsForCss(frame, params.page_number, params.params,
-                                  ignore_css_margins_, &scale_factor,
-                                  &page_layout_in_points);
-  gfx::Size page_size;
-  gfx::Rect content_area;
-  GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, &page_size,
-                                          &content_area);
-  gfx::Rect canvas_area =
-      params.params.display_header_footer ? gfx::Rect(page_size) : content_area;
-
-  skia::VectorCanvas* canvas =
-      metafile->GetVectorCanvasForNewPage(page_size, canvas_area, scale_factor);
-  if (!canvas)
-    return;
-
-  MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
-  skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_);
-
-  if (params.params.display_header_footer) {
-    // |page_number| is 0-based, so 1 is added.
-    // TODO(vitalybuka) : why does it work only with 1.25?
-    PrintHeaderAndFooter(canvas, params.page_number + 1,
-                         print_preview_context_.total_page_count(),
-                         scale_factor / 1.25, page_layout_in_points,
-                         *header_footer_info_, params.params);
-  }
-  RenderPageContent(frame, params.page_number, canvas_area, content_area,
-                    scale_factor, canvas);
-
-  // Done printing. Close the canvas to retrieve the compiled metafile.
-  if (!metafile->FinishPage())
-    NOTREACHED() << "metafile failed";
-}
-
-}  // namespace printing