blob: 79b82e9ca18a6e5cb680082c2d2eff8afd474b9e [file] [log] [blame]
// 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.
#include "components/printing/renderer/print_web_view_helper.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "components/printing/common/print_messages.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 "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_.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) {
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, 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)
}
void PrintWebViewHelper::PrintPageInternal(
const PrintMsg_PrintPage_Params& params,
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::PlatformCanvas* 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 defined(ENABLE_PRINT_PREVIEW)
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(), *frame,
scale_factor / 1.25, page_layout_in_points,
params.params);
}
#endif // defined(ENABLE_PRINT_PREVIEW)
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