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// Copyright (c) 2009 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"
#import <AppKit/AppKit.h>
#include "app/l10n_util.h"
#include "base/logging.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/render_messages_params.h"
#include "chrome/renderer/render_view.h"
#include "grit/generated_resources.h"
#include "printing/native_metafile.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCanvas.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebRect.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSize.h"
using WebKit::WebFrame;
using WebKit::WebCanvas;
using WebKit::WebRect;
using WebKit::WebSize;
void PrintWebViewHelper::PrintPage(const ViewMsg_PrintPage_Params& params,
const gfx::Size& canvas_size,
WebFrame* frame) {
printing::NativeMetafile metafile;
if (!metafile.Init())
return;
float scale_factor = frame->getPrintPageShrink(params.page_number);
double width = params.params.printable_size.width();
double height = params.params.printable_size.height();
int page_number = params.page_number;
// Render page for printing.
gfx::Point origin(0.0f, 0.0f);
RenderPage(params.params.printable_size, origin, scale_factor, page_number,
frame, &metafile);
metafile.Close();
double margin_left = params.params.margin_left;
double margin_top = params.params.margin_top;
// Get the size of the compiled metafile.
ViewHostMsg_DidPrintPage_Params page_params;
page_params.data_size = 0;
page_params.page_number = page_number;
page_params.document_cookie = params.params.document_cookie;
page_params.actual_shrink = scale_factor;
page_params.page_size = params.params.page_size;
page_params.content_area = gfx::Rect(margin_left, margin_top, width, height);
// Ask the browser to create the shared memory for us.
if (!CopyMetafileDataToSharedMem(&metafile,
&(page_params.metafile_data_handle))) {
NOTREACHED();
return;
}
page_params.data_size = metafile.GetDataSize();
Send(new ViewHostMsg_DidPrintPage(routing_id(), page_params));
}
void PrintWebViewHelper::CreatePreviewDocument(
const ViewMsg_PrintPages_Params& params,
WebFrame* frame,
ViewHostMsg_DidPreviewDocument_Params* print_params) {
ViewMsg_Print_Params printParams = params.params;
UpdatePrintableSizeInPrintParameters(frame, NULL, &printParams);
PrepareFrameAndViewForPrint prep_frame_view(printParams,
frame, NULL, frame->view());
int page_count = prep_frame_view.GetExpectedPageCount();
if (!page_count)
return;
float scale_factor = frame->getPrintPageShrink(0);
double originX = printParams.margin_left;
double originY = printParams.margin_top;
printing::NativeMetafile metafile;
if (!metafile.Init())
return;
gfx::Point origin(originX, originY);
if (params.pages.empty()) {
for (int i = 0; i < page_count; ++i) {
RenderPage(printParams.page_size, origin, scale_factor, i, frame,
&metafile);
}
} else {
for (size_t i = 0; i < params.pages.size(); ++i) {
if (params.pages[i] >= page_count)
break;
RenderPage(printParams.page_size, origin, scale_factor,
static_cast<int>(params.pages[i]), frame, &metafile);
}
}
metafile.Close();
// Ask the browser to create the shared memory for us.
if (!CopyMetafileDataToSharedMem(&metafile,
&(print_params->metafile_data_handle))) {
NOTREACHED();
return;
}
print_params->document_cookie = params.params.document_cookie;
print_params->data_size = metafile.GetDataSize();
}
void PrintWebViewHelper::RenderPage(
const gfx::Size& page_size, const gfx::Point& content_origin,
const float& scale_factor, int page_number, WebFrame* frame,
printing::NativeMetafile* metafile) {
CGContextRef context = metafile->StartPage(page_size, content_origin,
scale_factor);
DCHECK(context);
// printPage can create autoreleased references to |context|. PDF contexts
// don't write all their data until they are destroyed, so we need to make
// certain that there are no lingering references.
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
frame->printPage(page_number, context);
[pool release];
// Done printing. Close the device context to retrieve the compiled metafile.
metafile->FinishPage();
}
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