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// Copyright 2014 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/extensions/api/document_scan/document_scan_interface_chromeos.h"
#include "base/base64.h"
#include "base/bind.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/lorgnette_manager_client.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace {
const char kImageScanFailedError[] = "Image scan failed";
const char kScannerImageMimeTypePng[] = "image/png";
const char kPngImageDataUrlPrefix[] = "data:image/png;base64,";
} // namespace
namespace extensions {
namespace api {
DocumentScanInterfaceChromeos::DocumentScanInterfaceChromeos()
: lorgnette_manager_client_(nullptr) {}
DocumentScanInterfaceChromeos::~DocumentScanInterfaceChromeos() {}
void DocumentScanInterfaceChromeos::ListScanners(
const ListScannersResultsCallback& callback) {
GetLorgnetteManagerClient()->ListScanners(base::Bind(
&DocumentScanInterfaceChromeos::OnScannerListReceived,
base::Unretained(this),
callback));
}
void DocumentScanInterfaceChromeos::OnScannerListReceived(
const ListScannersResultsCallback& callback,
bool succeeded,
const chromeos::LorgnetteManagerClient::ScannerTable &scanners) {
std::vector<ScannerDescription> scanner_descriptions;
for (const auto& scanner : scanners) {
ScannerDescription description;
description.name = scanner.first;
const auto &entry = scanner.second;
auto info_it = entry.find(lorgnette::kScannerPropertyManufacturer);
if (info_it != entry.end()) {
description.manufacturer = info_it->second;
}
info_it = entry.find(lorgnette::kScannerPropertyModel);
if (info_it != entry.end()) {
description.model = info_it->second;
}
info_it = entry.find(lorgnette::kScannerPropertyType);
if (info_it != entry.end()) {
description.scanner_type = info_it->second;
}
description.image_mime_type = kScannerImageMimeTypePng;
scanner_descriptions.push_back(description);
}
const std::string kNoError;
callback.Run(scanner_descriptions, kNoError);
}
void DocumentScanInterfaceChromeos::Scan(const std::string& scanner_name,
ScanMode mode,
int resolution_dpi,
const ScanResultsCallback& callback) {
VLOG(1) << "Choosing scanner " << scanner_name;
chromeos::LorgnetteManagerClient::ScanProperties properties;
switch (mode) {
case kScanModeColor:
properties.mode = lorgnette::kScanPropertyModeColor;
break;
case kScanModeGray:
properties.mode = lorgnette::kScanPropertyModeGray;
break;
case kScanModeLineart:
properties.mode = lorgnette::kScanPropertyModeLineart;
break;
}
if (resolution_dpi != 0) {
properties.resolution_dpi = resolution_dpi;
}
GetLorgnetteManagerClient()->ScanImageToString(
scanner_name, properties,
base::Bind(&DocumentScanInterfaceChromeos::OnScanCompleted,
base::Unretained(this),
callback));
}
void DocumentScanInterfaceChromeos::OnScanCompleted(
const ScanResultsCallback &callback,
bool succeeded,
const std::string& image_data) {
VLOG(1) << "ScanImage returns " << succeeded;
std::string error_string;
if (!succeeded) {
error_string = kImageScanFailedError;
}
std::string image_base64;
base::Base64Encode(image_data, &image_base64);
std::string image_url(std::string(kPngImageDataUrlPrefix) + image_base64);
callback.Run(image_url, kScannerImageMimeTypePng, error_string);
}
chromeos::LorgnetteManagerClient*
DocumentScanInterfaceChromeos::GetLorgnetteManagerClient() {
if (!lorgnette_manager_client_) {
lorgnette_manager_client_ =
chromeos::DBusThreadManager::Get()->GetLorgnetteManagerClient();
CHECK(lorgnette_manager_client_);
}
return lorgnette_manager_client_;
}
// static
DocumentScanInterface *DocumentScanInterface::CreateInstance() {
return new DocumentScanInterfaceChromeos();
}
} // namespace api
} // namespace extensions
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