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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.
#ifndef DEVICE_USB_DEVICE_MANAGER_IMPL_H_
#define DEVICE_USB_DEVICE_MANAGER_IMPL_H_
#include <queue>
#include <set>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observer.h"
#include "device/devices_app/usb/public/interfaces/device_manager.mojom.h"
#include "device/devices_app/usb/public/interfaces/permission_provider.mojom.h"
#include "device/usb/usb_service.h"
#include "mojo/public/cpp/bindings/array.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "mojo/public/cpp/bindings/interface_request.h"
namespace base {
class SequencedTaskRunner;
}
namespace device {
class UsbDevice;
class UsbDeviceFilter;
class UsbDeviceHandle;
namespace usb {
class DeviceManagerDelegate;
// Implementation of the public DeviceManager interface. This interface can be
// requested from the devices app located at "mojo:devices", if available.
class DeviceManagerImpl : public DeviceManager,
public device::UsbService::Observer {
public:
using DeviceList = std::vector<scoped_refptr<UsbDevice>>;
using DeviceMap = std::map<std::string, scoped_refptr<device::UsbDevice>>;
static void Create(PermissionProviderPtr permission_provider,
mojo::InterfaceRequest<DeviceManager> request);
DeviceManagerImpl(PermissionProviderPtr permission_provider,
mojo::InterfaceRequest<DeviceManager> request);
~DeviceManagerImpl() override;
void set_connection_error_handler(const mojo::Closure& error_handler) {
connection_error_handler_ = error_handler;
}
private:
// DeviceManager implementation:
void GetDevices(EnumerationOptionsPtr options,
const GetDevicesCallback& callback) override;
void GetDeviceChanges(const GetDeviceChangesCallback& callback) override;
void GetDevice(const mojo::String& guid,
mojo::InterfaceRequest<Device> device_request) override;
// Callbacks to handle the async responses from the underlying UsbService.
void OnGetDevicePermissionCheckComplete(
scoped_refptr<device::UsbDevice> device,
mojo::InterfaceRequest<Device> device_request,
mojo::Array<mojo::String> allowed_guids);
void OnGetDevices(EnumerationOptionsPtr options,
const GetDevicesCallback& callback,
const DeviceList& devices);
// UsbService::Observer implementation:
void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
void OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) override;
void WillDestroyUsbService() override;
void MaybeRunDeviceChangesCallback();
void OnEnumerationPermissionCheckComplete(
const DeviceMap& devices_added,
const DeviceMap& devices_removed,
mojo::Array<mojo::String> allowed_guids);
PermissionProviderPtr permission_provider_;
// If there are unfinished calls to GetDeviceChanges their callbacks
// are stored in |device_change_callbacks_|. Otherwise device changes
// are collected in |devices_added_| and |devices_removed_| until the
// next call to GetDeviceChanges.
std::queue<GetDeviceChangesCallback> device_change_callbacks_;
DeviceMap devices_added_;
DeviceMap devices_removed_;
// To ensure that GetDeviceChangesCallbacks are called in the correct order
// only perform a single request to |permission_provider_| at a time.
bool permission_request_pending_ = false;
UsbService* usb_service_;
ScopedObserver<device::UsbService, device::UsbService::Observer> observer_;
mojo::Closure connection_error_handler_;
mojo::Binding<DeviceManager> binding_;
base::WeakPtrFactory<DeviceManagerImpl> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(DeviceManagerImpl);
};
} // namespace usb
} // namespace device
#endif // DEVICE_USB_DEVICE_MANAGER_IMPL_H_
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