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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/browser/printing/print_preview_message_handler.h"
#include <stdint.h>
#include <vector>
#include "base/bind.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/shared_memory.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/printing/print_job_manager.h"
#include "chrome/browser/printing/print_preview_dialog_controller.h"
#include "chrome/browser/printing/print_view_manager.h"
#include "chrome/browser/printing/printer_query.h"
#include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
#include "components/printing/common/print_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "printing/page_size_margins.h"
#include "printing/print_job_constants.h"
using content::BrowserThread;
using content::WebContents;
DEFINE_WEB_CONTENTS_USER_DATA_KEY(printing::PrintPreviewMessageHandler);
namespace printing {
namespace {
void StopWorker(int document_cookie) {
if (document_cookie <= 0)
return;
scoped_refptr<PrintQueriesQueue> queue =
g_browser_process->print_job_manager()->queue();
scoped_refptr<PrinterQuery> printer_query =
queue->PopPrinterQuery(document_cookie);
if (printer_query.get()) {
BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
base::Bind(&PrinterQuery::StopWorker,
printer_query));
}
}
scoped_refptr<base::RefCountedBytes> GetDataFromHandle(
base::SharedMemoryHandle handle,
uint32_t data_size) {
scoped_ptr<base::SharedMemory> shared_buf(
new base::SharedMemory(handle, true));
if (!shared_buf->Map(data_size)) {
NOTREACHED();
return nullptr;
}
unsigned char* data_begin = static_cast<unsigned char*>(shared_buf->memory());
std::vector<unsigned char> data(data_begin, data_begin + data_size);
return base::RefCountedBytes::TakeVector(&data);
}
} // namespace
PrintPreviewMessageHandler::PrintPreviewMessageHandler(
WebContents* web_contents)
: content::WebContentsObserver(web_contents) {
DCHECK(web_contents);
}
PrintPreviewMessageHandler::~PrintPreviewMessageHandler() {
}
WebContents* PrintPreviewMessageHandler::GetPrintPreviewDialog() {
PrintPreviewDialogController* dialog_controller =
PrintPreviewDialogController::GetInstance();
if (!dialog_controller)
return nullptr;
return dialog_controller->GetPrintPreviewForContents(web_contents());
}
PrintPreviewUI* PrintPreviewMessageHandler::GetPrintPreviewUI() {
WebContents* dialog = GetPrintPreviewDialog();
if (!dialog || !dialog->GetWebUI())
return nullptr;
return static_cast<PrintPreviewUI*>(dialog->GetWebUI()->GetController());
}
void PrintPreviewMessageHandler::OnRequestPrintPreview(
const PrintHostMsg_RequestPrintPreview_Params& params) {
if (params.webnode_only)
PrintViewManager::FromWebContents(web_contents())->PrintPreviewForWebNode();
PrintPreviewDialogController::PrintPreview(web_contents());
PrintPreviewUI::SetInitialParams(GetPrintPreviewDialog(), params);
}
void PrintPreviewMessageHandler::OnDidGetPreviewPageCount(
const PrintHostMsg_DidGetPreviewPageCount_Params& params) {
if (params.page_count <= 0) {
NOTREACHED();
return;
}
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
if (!params.is_modifiable || params.clear_preview_data)
print_preview_ui->ClearAllPreviewData();
print_preview_ui->OnDidGetPreviewPageCount(params);
}
void PrintPreviewMessageHandler::OnDidPreviewPage(
const PrintHostMsg_DidPreviewPage_Params& params) {
int page_number = params.page_number;
if (page_number < FIRST_PAGE_INDEX || !params.data_size)
return;
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
scoped_refptr<base::RefCountedBytes> data_bytes =
GetDataFromHandle(params.metafile_data_handle, params.data_size);
DCHECK(data_bytes);
print_preview_ui->SetPrintPreviewDataForIndex(page_number,
std::move(data_bytes));
print_preview_ui->OnDidPreviewPage(page_number, params.preview_request_id);
}
void PrintPreviewMessageHandler::OnMetafileReadyForPrinting(
const PrintHostMsg_DidPreviewDocument_Params& params) {
// Always try to stop the worker.
StopWorker(params.document_cookie);
if (params.expected_pages_count <= 0) {
NOTREACHED();
return;
}
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
// TODO(joth): This seems like a good match for using RefCountedStaticMemory
// to avoid the memory copy, but the SetPrintPreviewData call chain below
// needs updating to accept the RefCountedMemory* base class.
scoped_refptr<base::RefCountedBytes> data_bytes =
GetDataFromHandle(params.metafile_data_handle, params.data_size);
if (!data_bytes || !data_bytes->size())
return;
print_preview_ui->SetPrintPreviewDataForIndex(COMPLETE_PREVIEW_DOCUMENT_INDEX,
std::move(data_bytes));
print_preview_ui->OnPreviewDataIsAvailable(
params.expected_pages_count, params.preview_request_id);
}
void PrintPreviewMessageHandler::OnPrintPreviewFailed(int document_cookie) {
StopWorker(document_cookie);
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
print_preview_ui->OnPrintPreviewFailed();
}
void PrintPreviewMessageHandler::OnDidGetDefaultPageLayout(
const PageSizeMargins& page_layout_in_points,
const gfx::Rect& printable_area_in_points,
bool has_custom_page_size_style) {
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
print_preview_ui->OnDidGetDefaultPageLayout(page_layout_in_points,
printable_area_in_points,
has_custom_page_size_style);
}
void PrintPreviewMessageHandler::OnPrintPreviewCancelled(int document_cookie) {
// Always need to stop the worker.
StopWorker(document_cookie);
}
void PrintPreviewMessageHandler::OnInvalidPrinterSettings(int document_cookie) {
StopWorker(document_cookie);
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
print_preview_ui->OnInvalidPrinterSettings();
}
void PrintPreviewMessageHandler::OnSetOptionsFromDocument(
const PrintHostMsg_SetOptionsFromDocument_Params& params) {
PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
if (!print_preview_ui)
return;
print_preview_ui->OnSetOptionsFromDocument(params);
}
bool PrintPreviewMessageHandler::OnMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PrintPreviewMessageHandler, message)
IPC_MESSAGE_HANDLER(PrintHostMsg_RequestPrintPreview,
OnRequestPrintPreview)
IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetPreviewPageCount,
OnDidGetPreviewPageCount)
IPC_MESSAGE_HANDLER(PrintHostMsg_DidPreviewPage,
OnDidPreviewPage)
IPC_MESSAGE_HANDLER(PrintHostMsg_MetafileReadyForPrinting,
OnMetafileReadyForPrinting)
IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewFailed,
OnPrintPreviewFailed)
IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetDefaultPageLayout,
OnDidGetDefaultPageLayout)
IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewCancelled,
OnPrintPreviewCancelled)
IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewInvalidPrinterSettings,
OnInvalidPrinterSettings)
IPC_MESSAGE_HANDLER(PrintHostMsg_SetOptionsFromDocument,
OnSetOptionsFromDocument)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
} // namespace printing
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