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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 "device/usb/mojo/device_manager_impl.h"
#include <stddef.h>
#include <utility>
#include "base/bind.h"
#include "base/location.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "device/core/device_client.h"
#include "device/usb/mojo/device_impl.h"
#include "device/usb/mojo/permission_provider.h"
#include "device/usb/mojo/type_converters.h"
#include "device/usb/public/interfaces/device.mojom.h"
#include "device/usb/usb_device.h"
#include "device/usb/usb_device_filter.h"
#include "device/usb/usb_service.h"
#include "mojo/public/cpp/bindings/array.h"
#include "mojo/public/cpp/bindings/interface_request.h"
namespace device {
namespace usb {
// static
void DeviceManagerImpl::Create(
base::WeakPtr<PermissionProvider> permission_provider,
mojo::InterfaceRequest<DeviceManager> request) {
DCHECK(DeviceClient::Get());
UsbService* usb_service = DeviceClient::Get()->GetUsbService();
if (usb_service) {
new DeviceManagerImpl(permission_provider, usb_service, std::move(request));
}
}
DeviceManagerImpl::DeviceManagerImpl(
base::WeakPtr<PermissionProvider> permission_provider,
UsbService* usb_service,
mojo::InterfaceRequest<DeviceManager> request)
: permission_provider_(permission_provider),
usb_service_(usb_service),
observer_(this),
binding_(this, std::move(request)),
weak_factory_(this) {
// This object owns itself and will be destroyed if the message pipe it is
// bound to is closed or the UsbService is shut down.
binding_.set_connection_error_handler([this]() { delete this; });
observer_.Add(usb_service_);
}
DeviceManagerImpl::~DeviceManagerImpl() {
connection_error_handler_.Run();
}
void DeviceManagerImpl::GetDevices(EnumerationOptionsPtr options,
const GetDevicesCallback& callback) {
usb_service_->GetDevices(base::Bind(&DeviceManagerImpl::OnGetDevices,
weak_factory_.GetWeakPtr(),
base::Passed(&options), callback));
}
void DeviceManagerImpl::GetDeviceChanges(
const GetDeviceChangesCallback& callback) {
device_change_callbacks_.push(callback);
MaybeRunDeviceChangesCallback();
}
void DeviceManagerImpl::GetDevice(
const mojo::String& guid,
mojo::InterfaceRequest<Device> device_request) {
scoped_refptr<UsbDevice> device = usb_service_->GetDevice(guid);
if (!device)
return;
DeviceInfoPtr device_info = DeviceInfo::From(*device);
if (permission_provider_ &&
permission_provider_->HasDevicePermission(*device_info)) {
new DeviceImpl(device, std::move(device_info), permission_provider_,
std::move(device_request));
}
}
void DeviceManagerImpl::OnGetDevices(
EnumerationOptionsPtr options,
const GetDevicesCallback& callback,
const std::vector<scoped_refptr<UsbDevice>>& devices) {
std::vector<UsbDeviceFilter> filters;
if (options)
filters = options->filters.To<std::vector<UsbDeviceFilter>>();
mojo::Array<DeviceInfoPtr> device_infos;
for (const auto& device : devices) {
if (filters.empty() || UsbDeviceFilter::MatchesAny(device, filters)) {
DeviceInfoPtr device_info = DeviceInfo::From(*device);
if (permission_provider_ &&
permission_provider_->HasDevicePermission(*device_info)) {
device_infos.push_back(std::move(device_info));
}
}
}
callback.Run(std::move(device_infos));
}
void DeviceManagerImpl::OnDeviceAdded(scoped_refptr<UsbDevice> device) {
DeviceInfoPtr device_info = DeviceInfo::From(*device);
if (permission_provider_ &&
permission_provider_->HasDevicePermission(*device_info)) {
devices_added_[device->guid()] = std::move(device_info);
MaybeRunDeviceChangesCallback();
}
}
void DeviceManagerImpl::OnDeviceRemoved(scoped_refptr<UsbDevice> device) {
if (devices_added_.erase(device->guid()) == 0) {
DeviceInfoPtr device_info = DeviceInfo::From(*device);
if (permission_provider_ &&
permission_provider_->HasDevicePermission(*device_info)) {
devices_removed_.push_back(std::move(device_info));
MaybeRunDeviceChangesCallback();
}
}
}
void DeviceManagerImpl::WillDestroyUsbService() {
delete this;
}
void DeviceManagerImpl::MaybeRunDeviceChangesCallback() {
if (!device_change_callbacks_.empty()) {
DeviceChangeNotificationPtr notification = DeviceChangeNotification::New();
notification->devices_added.SetToEmpty();
notification->devices_removed.SetToEmpty();
for (auto& map_entry : devices_added_) {
notification->devices_added.push_back(std::move(map_entry.second));
}
devices_added_.clear();
notification->devices_removed.Swap(&devices_removed_);
const GetDeviceChangesCallback& callback = device_change_callbacks_.front();
callback.Run(std::move(notification));
device_change_callbacks_.pop();
}
}
} // namespace usb
} // namespace device
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