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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 "base/process_util.h"
#include "base/scoped_cftyperef.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/render_view.h"
#include "grit/generated_resources.h"
#include "printing/native_metafile.h"
#include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/WebKit/chromium/public/WebCanvas.h"
using WebKit::WebFrame;
using WebKit::WebCanvas;
void PrintWebViewHelper::PrintPage(const ViewMsg_PrintPage_Params& params,
const gfx::Size& canvas_size,
WebFrame* frame) {
printing::NativeMetafile metafile;
CGContextRef context = metafile.Init();
float scale_factor = frame->getPrintPageShrink(params.page_number);
metafile.StartPage(canvas_size.width(), canvas_size.height(), scale_factor);
// printPage can create autoreleased references to |canvas|. 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(params.page_number, context);
[pool release];
metafile.FinishPage();
metafile.Close();
// Get the size of the compiled metafile.
ViewHostMsg_DidPrintPage_Params page_params;
page_params.data_size = 0;
page_params.page_number = params.page_number;
page_params.document_cookie = params.params.document_cookie;
page_params.actual_shrink = scale_factor;
base::SharedMemory shared_buf;
// Ask the browser to create the shared memory for us.
uint32 buf_size = metafile.GetDataSize();
base::SharedMemoryHandle shared_mem_handle;
if (Send(new ViewHostMsg_AllocatePDFTransport(routing_id(), buf_size,
&shared_mem_handle))) {
if (base::SharedMemory::IsHandleValid(shared_mem_handle)) {
base::SharedMemory shared_buf(shared_mem_handle, false);
if (shared_buf.Map(buf_size)) {
metafile.GetData(shared_buf.memory(), buf_size);
page_params.data_size = buf_size;
shared_buf.GiveToProcess(base::GetCurrentProcessHandle(),
&(page_params.metafile_data_handle));
} else {
NOTREACHED() << "Map failed";
}
} else {
NOTREACHED() << "Browser failed to allocate shared memory";
}
} else {
NOTREACHED() << "Browser allocation request message failed";
}
Send(new ViewHostMsg_DidPrintPage(routing_id(), page_params));
}
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