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// 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 "chrome/renderer/printing/print_web_view_helper.h"
#import <AppKit/AppKit.h>
#include "base/logging.h"
#include "base/mac/scoped_nsautorelease_pool.h"
#include "base/metrics/histogram.h"
#include "chrome/common/print_messages.h"
#include "printing/metafile.h"
#include "printing/metafile_impl.h"
#include "printing/metafile_skia_wrapper.h"
#include "printing/page_size_margins.h"
#include "skia/ext/platform_device.h"
#include "skia/ext/vector_canvas.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebCanvas.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
namespace printing {
using WebKit::WebFrame;
void PrintWebViewHelper::PrintPageInternal(
const PrintMsg_PrintPage_Params& params,
const gfx::Size& canvas_size,
WebFrame* frame) {
NativeMetafile metafile;
if (!metafile.Init())
return;
int page_number = params.page_number;
gfx::Size page_size_in_dpi;
gfx::Rect content_area_in_dpi;
RenderPage(print_pages_params_->params, page_number, frame, false, &metafile,
&page_size_in_dpi, &content_area_in_dpi);
metafile.FinishDocument();
PrintHostMsg_DidPrintPage_Params page_params;
page_params.data_size = metafile.GetDataSize();
page_params.page_number = page_number;
page_params.document_cookie = params.params.document_cookie;
page_params.page_size = page_size_in_dpi;
page_params.content_area = content_area_in_dpi;
// Ask the browser to create the shared memory for us.
if (!CopyMetafileDataToSharedMem(&metafile,
&(page_params.metafile_data_handle))) {
page_params.data_size = 0;
}
Send(new PrintHostMsg_DidPrintPage(routing_id(), page_params));
}
bool PrintWebViewHelper::RenderPreviewPage(
int page_number,
const PrintMsg_Print_Params& print_params) {
PrintMsg_Print_Params printParams = print_params;
scoped_ptr<Metafile> draft_metafile;
Metafile* initial_render_metafile = print_preview_context_.metafile();
bool render_to_draft = print_preview_context_.IsModifiable() &&
is_print_ready_metafile_sent_;
if (render_to_draft) {
draft_metafile.reset(new PreviewMetafile());
if (!draft_metafile->Init()) {
print_preview_context_.set_error(
PREVIEW_ERROR_MAC_DRAFT_METAFILE_INIT_FAILED);
LOG(ERROR) << "Draft PreviewMetafile Init failed";
return false;
}
initial_render_metafile = draft_metafile.get();
}
base::TimeTicks begin_time = base::TimeTicks::Now();
gfx::Size page_size;
RenderPage(printParams, page_number, print_preview_context_.frame(), true,
initial_render_metafile, &page_size, NULL);
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.reset(
print_preview_context_.metafile()->GetMetafileForCurrentPage());
}
}
return PreviewPageRendered(page_number, draft_metafile.get());
}
void PrintWebViewHelper::RenderPage(
const PrintMsg_Print_Params& params, int page_number, WebFrame* frame,
bool is_preview, Metafile* metafile, gfx::Size* page_size,
gfx::Rect* content_rect) {
double scale_factor = 1.0f;
double webkit_shrink_factor = frame->getPrintPageShrink(page_number);
PageSizeMargins page_layout_in_points;
gfx::Rect content_area;
ComputePageLayoutInPointsForCss(frame, page_number, params,
ignore_css_margins_, &scale_factor,
&page_layout_in_points);
GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, page_size,
&content_area);
if (content_rect)
*content_rect = content_area;
scale_factor *= webkit_shrink_factor;
gfx::Rect canvas_area =
params.display_header_footer ? gfx::Rect(*page_size) : content_area;
{
SkDevice* device = metafile->StartPageForVectorCanvas(
*page_size, canvas_area, scale_factor);
if (!device)
return;
skia::RefPtr<skia::VectorCanvas> canvas =
skia::AdoptRef(new skia::VectorCanvas(device));
WebKit::WebCanvas* canvas_ptr = canvas.get();
MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_);
skia::SetIsPreviewMetafile(*canvas, is_preview);
if (print_pages_params_->params.display_header_footer) {
PrintHeaderAndFooter(canvas_ptr, page_number + 1,
print_preview_context_.total_page_count(),
scale_factor, page_layout_in_points,
*header_footer_info_, params);
}
RenderPageContent(frame, page_number, canvas_area, content_area,
scale_factor, canvas_ptr);
}
// Done printing. Close the device context to retrieve the compiled metafile.
metafile->FinishPage();
}
} // namespace printing
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