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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.Core.DI;
using Tango.Integration.ExternalBridge;
using Tango.PPC.Common.Application;
using Tango.PPC.Common.ExternalBridge;
using Tango.RemoteDesktop;
using Tango.RemoteDesktop.CaptureMethods;
using Tango.RemoteDesktop.Encoders;
using Tango.RemoteDesktop.Engines;
using Tango.RemoteDesktop.Frames;
using Tango.RemoteDesktop.Network;
using Tango.Settings;
using Tango.Transport;
namespace Tango.PPC.Common.RemoteDesktop
{
[TangoCreateWhenRegistered]
public class DefaultRemoteDesktopService : ExtendedObject, IRemoteDesktopService, IExternalBridgeRequestHandler
{
private class RemoteDesktopClient
{
public String Token { get; set; }
public ExternalBridgeReceiver Receiver { get; set; }
public bool InitialPacketSent { get; set; }
}
private RemoteDesktopPacket _initialPacket;
private RasterScreenCaptureEngine _engine;
private PPCSettings _settings;
private List<RemoteDesktopClient> _clients;
public DefaultRemoteDesktopService(IPPCApplicationManager applicationManager, IPPCExternalBridgeService externalBridge)
{
_settings = SettingsManager.Default.GetOrCreate<PPCSettings>();
applicationManager.ApplicationReady += ApplicationManager_ApplicationReady;
externalBridge.RegisterRequestHandler(this);
_clients = new List<RemoteDesktopClient>();
_engine = new RasterScreenCaptureEngine();
_engine.FrameRate = Math.Min(Math.Max(_settings.RemoteDesktopFrameRate, 1), 20);
_engine.FrameReceived += _engine_FrameReceived;
}
private void ApplicationManager_ApplicationReady(object sender, EventArgs e)
{
#if DEBUG
_engine.CaptureMethod.Dispose();
var mainWindow = System.Windows.Application.Current.MainWindow;
_engine.CaptureRegion = new CaptureRegion()
{
Left = (int)mainWindow.Left,
Top = (int)mainWindow.Top,
Width = (int)mainWindow.Width,
Height = (int)mainWindow.Height
};
_engine.CaptureMethod = new GdiScreenCapture();
#endif
if (_settings.EnableRemoteDesktop)
{
Start();
}
}
private bool _isStarted;
public bool IsStarted
{
get { return _isStarted; }
private set { _isStarted = value; RaisePropertyChangedAuto(); }
}
public void Start()
{
if (!IsStarted)
{
_engine.Start();
IsStarted = true;
}
}
public void Stop()
{
if (IsStarted)
{
_engine.Stop();
IsStarted = false;
}
}
[ExternalBridgeRequestHandlerMethod(typeof(StartRemoteDesktopSessionRequest))]
public async void OnStartRemoteDesktopSessionRequestReceived(StartRemoteDesktopSessionRequest request, String token, ExternalBridgeReceiver receiver)
{
var client = _clients.SingleOrDefault(x => x.Receiver == receiver);
if (client != null)
{
_clients.Remove(client);
}
_clients.Add(new RemoteDesktopClient()
{
Receiver = receiver,
Token = token
});
await receiver.SendGenericResponse(new StartRemoteDesktopSessionResponse()
{
FrameRate = _engine.FrameRate
}, token, new TransportResponseConfig()
{
Immediate = true,
});
}
private async void _engine_FrameReceived(object sender, ScreenCaptureFrameReceivedEventArgs<RasterFrame> e)
{
_initialPacket = new RemoteDesktopPacket()
{
Bitmap = e.Frame.ToEncoder<PngEncoder>().ToArray(),
};
foreach (var client in _clients.ToList().Where(x => !x.InitialPacketSent))
{
try
{
await client.Receiver.SendGenericResponse(new StartRemoteDesktopSessionResponse()
{
Packet = _initialPacket,
}, client.Token, new TransportResponseConfig()
{
Immediate = true,
});
client.InitialPacketSent = true;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
if (e.Frame.DifferenceAvailable && e.Frame.DifferenceCount > 0)
{
var diffFrame = e.Frame.ToDifference();
diffFrame = diffFrame.OptimizeBounds();
RemoteDesktopPacket packet = new RemoteDesktopPacket()
{
Bitmap = diffFrame.ToEncoder<PngEncoder>().ToArray(),
IsPartial = true,
PartialRegion = new CaptureRegion(diffFrame.Left, diffFrame.Top, diffFrame.Width, diffFrame.Height),
};
diffFrame.Dispose();
e.Frame.Dispose();
foreach (var client in _clients.ToList().Where(x => x.InitialPacketSent))
{
try
{
await client.Receiver.SendGenericResponse(new StartRemoteDesktopSessionResponse()
{
Packet = packet
}, client.Token, new TransportResponseConfig()
{
Immediate = false,
});
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
}
}
public void OnReceiverDisconnected(ExternalBridgeReceiver receiver)
{
var client = _clients.SingleOrDefault(x => x.Receiver == receiver);
if (client != null)
{
_clients.Remove(client);
}
}
}
}
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