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// Copyright 2015 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/ui/webui/print_preview/extension_printer_handler.h"
#include <algorithm>
#include "base/bind.h"
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/task_runner_util.h"
#include "chrome/browser/local_discovery/pwg_raster_converter.h"
#include "components/cloud_devices/common/cloud_device_description.h"
#include "components/cloud_devices/common/printer_description.h"
#include "extensions/browser/api/printer_provider/printer_provider_api.h"
#include "extensions/browser/api/printer_provider/printer_provider_api_factory.h"
#include "extensions/browser/api/printer_provider/printer_provider_print_job.h"
#include "printing/pdf_render_settings.h"
#include "printing/pwg_raster_settings.h"
using local_discovery::PWGRasterConverter;
namespace {
const char kContentTypePdf[] = "application/pdf";
const char kContentTypePWGRaster[] = "image/pwg-raster";
const char kContentTypeAll[] = "*/*";
const char kInvalidDataPrintError[] = "INVALID_DATA";
const char kInvalidTicketPrintError[] = "INVALID_TICKET";
// Reads raster data from file path |raster_path| and returns it as
// RefCountedMemory. Returns NULL on error.
scoped_refptr<base::RefCountedMemory> ReadConvertedPWGRasterFileOnWorkerThread(
const base::FilePath& raster_path) {
int64 file_size;
if (base::GetFileSize(raster_path, &file_size) &&
file_size <= extensions::PrinterProviderAPI::kMaxDocumentSize) {
std::string data;
data.reserve(file_size);
if (base::ReadFileToString(raster_path, &data)) {
return scoped_refptr<base::RefCountedMemory>(
base::RefCountedString::TakeString(&data));
}
} else {
LOG(ERROR) << "Invalid raster file size.";
}
return scoped_refptr<base::RefCountedMemory>();
}
// Posts a task to read a file containing converted PWG raster data to the
// worker pool.
void ReadConvertedPWGRasterFile(
const scoped_refptr<base::TaskRunner>& slow_task_runner,
const ExtensionPrinterHandler::RefCountedMemoryCallback& callback,
bool success,
const base::FilePath& pwg_file_path) {
if (!success) {
callback.Run(scoped_refptr<base::RefCountedMemory>());
return;
}
base::PostTaskAndReplyWithResult(
slow_task_runner.get(), FROM_HERE,
base::Bind(&ReadConvertedPWGRasterFileOnWorkerThread, pwg_file_path),
callback);
}
} // namespace
ExtensionPrinterHandler::ExtensionPrinterHandler(
content::BrowserContext* browser_context,
const scoped_refptr<base::TaskRunner>& slow_task_runner)
: browser_context_(browser_context),
slow_task_runner_(slow_task_runner),
weak_ptr_factory_(this) {
}
ExtensionPrinterHandler::~ExtensionPrinterHandler() {
}
void ExtensionPrinterHandler::Reset() {
// TODO(tbarzic): Keep track of pending request ids issued by |this| and
// cancel them from here.
weak_ptr_factory_.InvalidateWeakPtrs();
}
void ExtensionPrinterHandler::StartGetPrinters(
const PrinterHandler::GetPrintersCallback& callback) {
extensions::PrinterProviderAPIFactory::GetInstance()
->GetForBrowserContext(browser_context_)
->DispatchGetPrintersRequested(
base::Bind(&ExtensionPrinterHandler::WrapGetPrintersCallback,
weak_ptr_factory_.GetWeakPtr(), callback));
}
void ExtensionPrinterHandler::StartGetCapability(
const std::string& destination_id,
const PrinterHandler::GetCapabilityCallback& callback) {
extensions::PrinterProviderAPIFactory::GetInstance()
->GetForBrowserContext(browser_context_)
->DispatchGetCapabilityRequested(
destination_id,
base::Bind(&ExtensionPrinterHandler::WrapGetCapabilityCallback,
weak_ptr_factory_.GetWeakPtr(), callback, destination_id));
}
void ExtensionPrinterHandler::StartPrint(
const std::string& destination_id,
const std::string& capability,
const std::string& ticket_json,
const gfx::Size& page_size,
const scoped_refptr<base::RefCountedMemory>& print_data,
const PrinterHandler::PrintCallback& callback) {
scoped_ptr<extensions::PrinterProviderPrintJob> print_job(
new extensions::PrinterProviderPrintJob());
print_job->printer_id = destination_id;
print_job->ticket_json = ticket_json;
cloud_devices::CloudDeviceDescription printer_description;
printer_description.InitFromString(capability);
cloud_devices::printer::ContentTypesCapability content_types;
content_types.LoadFrom(printer_description);
const bool kUsePdf = content_types.Contains(kContentTypePdf) ||
content_types.Contains(kContentTypeAll);
if (kUsePdf) {
print_job->content_type = kContentTypePdf;
DispatchPrintJob(callback, print_job.Pass(), print_data);
return;
}
cloud_devices::CloudDeviceDescription ticket;
if (!ticket.InitFromString(ticket_json)) {
WrapPrintCallback(callback, false, kInvalidTicketPrintError);
return;
}
print_job->content_type = kContentTypePWGRaster;
ConvertToPWGRaster(print_data, printer_description, ticket, page_size,
base::Bind(&ExtensionPrinterHandler::DispatchPrintJob,
weak_ptr_factory_.GetWeakPtr(), callback,
base::Passed(&print_job)));
}
void ExtensionPrinterHandler::SetPwgRasterConverterForTesting(
scoped_ptr<local_discovery::PWGRasterConverter> pwg_raster_converter) {
pwg_raster_converter_ = pwg_raster_converter.Pass();
}
void ExtensionPrinterHandler::ConvertToPWGRaster(
const scoped_refptr<base::RefCountedMemory>& data,
const cloud_devices::CloudDeviceDescription& printer_description,
const cloud_devices::CloudDeviceDescription& ticket,
const gfx::Size& page_size,
const ExtensionPrinterHandler::RefCountedMemoryCallback& callback) {
if (!pwg_raster_converter_) {
pwg_raster_converter_ = PWGRasterConverter::CreateDefault();
}
pwg_raster_converter_->Start(
data.get(),
PWGRasterConverter::GetConversionSettings(printer_description, page_size),
PWGRasterConverter::GetBitmapSettings(printer_description, ticket),
base::Bind(&ReadConvertedPWGRasterFile, slow_task_runner_, callback));
}
void ExtensionPrinterHandler::DispatchPrintJob(
const PrinterHandler::PrintCallback& callback,
scoped_ptr<extensions::PrinterProviderPrintJob> print_job,
const scoped_refptr<base::RefCountedMemory>& print_data) {
if (!print_data) {
WrapPrintCallback(callback, false, kInvalidDataPrintError);
return;
}
print_job->document_bytes = print_data;
extensions::PrinterProviderAPIFactory::GetInstance()
->GetForBrowserContext(browser_context_)
->DispatchPrintRequested(
*print_job, base::Bind(&ExtensionPrinterHandler::WrapPrintCallback,
weak_ptr_factory_.GetWeakPtr(), callback));
}
void ExtensionPrinterHandler::WrapGetPrintersCallback(
const PrinterHandler::GetPrintersCallback& callback,
const base::ListValue& printers,
bool done) {
callback.Run(printers, done);
}
void ExtensionPrinterHandler::WrapGetCapabilityCallback(
const PrinterHandler::GetCapabilityCallback& callback,
const std::string& destination_id,
const base::DictionaryValue& capability) {
callback.Run(destination_id, capability);
}
void ExtensionPrinterHandler::WrapPrintCallback(
const PrinterHandler::PrintCallback& callback,
bool success,
const std::string& status) {
callback.Run(success, status);
}
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