[Linux] Implemented libinput keyboard input

Source/OpenTK/OpenTK.csproj

@@ -820,6 +820,7 @@
     <Compile Include="Platform\Linux\Bindings\LibInput.cs" />
     <Compile Include="Platform\Linux\LinuxInput.cs" />
     <Compile Include="Platform\Linux\Bindings\Terminal.cs" />
+    <Compile Include="Platform\DeviceCollection.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>

Source/OpenTK/Platform/DeviceCollection.cs

@@ -0,0 +1,144 @@
+#region License
+//
+// DeviceCollection.cs
+//
+// Author:
+//       Stefanos A. <stapostol@gmail.com>
+//
+// Copyright (c) 2006-2014 
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace OpenTK
+{
+    // Holds a collection of hardware devices with an associated id.
+    // Note: 'id' refers to a unique hardware-specific device identifier.
+    // Note: 'index' refers to the offset of the device in the Devices array.
+    //        Indices are allocated sequentially as devices are added to the system.
+    //        If a device is removed, its index will be reused for the next device
+    //        that is added.
+    class DeviceCollection<T> : IEnumerable<T>
+    {
+        readonly object Sync = new object();
+        readonly Dictionary<int, int> Map = new Dictionary<int, int>();
+        readonly List<T> Devices = new List<T>();
+
+        #region IEnumerable<T> Members
+
+        public IEnumerator<T> GetEnumerator()
+        {
+            return Devices.GetEnumerator();
+        }
+
+        #endregion
+
+        #region IEnumerable implementation
+
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        #endregion
+
+        #region Public Members
+
+        public void Add(int id, T device)
+        {
+            if (!Map.ContainsKey(id))
+            {
+                int index = GetIndex();
+                Map.Add(id, index);
+            }
+
+            Devices[Map[id]] = device;
+        }
+
+        public void Remove(int id)
+        {
+            if (!Map.ContainsKey(id))
+            {
+                Debug.Print("Invalid DeviceCollection<{0}> id: {1}", typeof(T).FullName, id);
+                return;
+            }
+
+            Devices[Map[id]] = default(T);
+            Map.Remove(id);
+        }
+
+        public T FromIndex(int index)
+        {
+            if (index >= 0 && index < Devices.Count)
+            {
+                return Devices[index];
+            }
+            else
+            {
+                return default(T);
+            }
+        }
+
+        public T FromHardwareId(int id)
+        {
+            if (Map.ContainsKey(id))
+            {
+                return FromIndex(Map[id]);
+            }
+            else
+            {
+                return default(T);
+            }
+        }
+
+        public int Count
+        {
+            get { return Map.Count; }
+        }
+
+        #endregion
+
+        #region Private Members
+
+        // Return the index of the first empty slot in Devices.
+        // If no empty slot exists, append a new one and return
+        // that index.
+        int GetIndex()
+        {
+            for (int i = 0; i < Devices.Count; i++)
+            {
+                if (Devices[i] == null)
+                {
+                    return i;
+                }
+            }
+
+            Devices.Add(default(T));
+            return Devices.Count - 1;
+        }
+
+        #endregion
+    }
+}
+

Source/OpenTK/Platform/Linux/Bindings/LibInput.cs

@@ -55,9 +55,43 @@ namespace OpenTK.Platform.Linux
         [DllImport(lib, EntryPoint = "libinput_event_destroy", CallingConvention = CallingConvention.Cdecl)]
         public static extern void DestroyEvent(IntPtr @event);
 
+        [DllImport(lib, EntryPoint = "libinput_device_get_sysname", CallingConvention = CallingConvention.Cdecl)]
+        static extern IntPtr DeviceGetNameInternal(IntPtr device);
+        public static string DeviceGetName(IntPtr device)
+        {
+            unsafe
+            {
+                return new string((sbyte*)DeviceGetNameInternal(device));
+            }
+        }
+
+        [DllImport(lib, EntryPoint = "libinput_device_get_user_data", CallingConvention = CallingConvention.Cdecl)]
+        public static extern IntPtr DeviceGetData(IntPtr device);
+
+        [DllImport(lib, EntryPoint = "libinput_device_set_user_data", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void DeviceSetData(IntPtr device, IntPtr user_data);
+
+        [DllImport(lib, EntryPoint = "libinput_device_get_output_name", CallingConvention = CallingConvention.Cdecl)]
+        static extern IntPtr DeviceGetOutputNameInternal(IntPtr device);
+        public static string DeviceGetOutputName(IntPtr device)
+        {
+            unsafe
+            {
+                sbyte* pname = (sbyte*)DeviceGetOutputNameInternal(device);
+                return pname == null ? String.Empty : new string(pname);
+            }
+        }
+
+        [DllImport(lib, EntryPoint = "libinput_device_has_capability", CallingConvention = CallingConvention.Cdecl)]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static extern bool DeviceHasCapability(IntPtr device, DeviceCapability capability);
+
         [DllImport(lib, EntryPoint = "libinput_dispatch", CallingConvention = CallingConvention.Cdecl)]
         public static extern int Dispatch(IntPtr libinput);
 
+        [DllImport(lib, EntryPoint = "libinput_event_get_device", CallingConvention = CallingConvention.Cdecl)]
+        public static extern IntPtr GetDevice(IntPtr @event);
+
         [DllImport(lib, EntryPoint = "libinput_get_event", CallingConvention = CallingConvention.Cdecl)]
         public static extern IntPtr GetEvent(IntPtr libinput);
 
@@ -77,6 +111,13 @@ namespace OpenTK.Platform.Linux
         public static extern void Suspend(IntPtr libinput);
     }
 
+    enum DeviceCapability
+    {
+        Keyboard = 0,
+        Mouse,
+        Touch
+    }
+
     enum InputEventType
     {
         None = 0,

Source/OpenTK/Platform/Linux/LinuxInput.cs

@@ -37,6 +37,62 @@ namespace OpenTK.Platform.Linux
 {
     class LinuxInput : IKeyboardDriver2, IMouseDriver2, IDisposable
     {
+        class KeyboardDevice
+        {
+            readonly IntPtr Device;
+            string name;
+            string output;
+
+            public KeyboardDevice(IntPtr device, int id)
+            {
+                Device = device;
+                Id = id;
+                State.SetIsConnected(true);
+            }
+
+            public int Id
+            {
+                get
+                {
+                    return GetId(Device);
+                }
+                set
+                {
+                    LibInput.DeviceSetData(Device, (IntPtr)value);
+                }
+            }
+
+            public string Name
+            {
+                get
+                {
+                    name = name ?? LibInput.DeviceGetName(Device);
+                    return name;
+                }
+            }
+
+            public string Output
+            {
+                get
+                {
+                    output = output ?? LibInput.DeviceGetOutputName(Device);
+                    return output;
+                }
+            }
+
+            public KeyboardState State;
+        }
+
+        class MouseDevice
+        {
+            public int FD;
+            public string Name;
+            public MouseState State;
+        }
+
+        DeviceCollection<KeyboardDevice> Keyboards = new DeviceCollection<KeyboardDevice>();
+        DeviceCollection<MouseDevice> Mice = new DeviceCollection<MouseDevice>();
+
         IntPtr udev;
         IntPtr input_context;
         InputInterface input_interface = new InputInterface(
@@ -102,6 +158,8 @@ namespace OpenTK.Platform.Linux
             poll_fd.fd = fd;
             poll_fd.events = PollFlags.In;
 
+            LibInput.Resume(input_context);
+
             while (Interlocked.Read(ref exit) == 0)
             {
                 int ret = Libc.poll(ref poll_fd, 1, -1);
@@ -124,8 +182,23 @@ namespace OpenTK.Platform.Linux
                         continue;
                     }
 
+                    IntPtr device = LibInput.GetDevice(pevent);
                     InputEventType type = LibInput.GetEventType(pevent);
-                    Debug.Print(type.ToString());
+                    switch (type)
+                    {
+                        case InputEventType.DeviceAdded:
+                            HandleDeviceAdded(input_context, device);
+                            break;
+
+                        case InputEventType.DeviceRemoved:
+                            HandleDeviceRemoved(input_context, device);
+                            break;
+
+                        case InputEventType.KeyboardKey:
+                            HandleKeyboard(input_context, device);
+                            break;
+                    }
+                    Debug.WriteLine(type.ToString());
 
                     LibInput.DestroyEvent(pevent);
                 }
@@ -139,23 +212,91 @@ namespace OpenTK.Platform.Linux
             }
         }
 
+        void HandleDeviceAdded(IntPtr context, IntPtr device)
+        {
+            if (LibInput.DeviceHasCapability(device, DeviceCapability.Keyboard))
+            {
+                KeyboardDevice keyboard = new KeyboardDevice(device, Keyboards.Count);
+                Keyboards.Add(keyboard.Id, keyboard);
+            }
+
+            if (LibInput.DeviceHasCapability(device, DeviceCapability.Mouse))
+            {
+                Debug.Print("[Linux] Todo: libinput mouse device.");
+            }
+
+            if (LibInput.DeviceHasCapability(device, DeviceCapability.Touch))
+            {
+                Debug.Print("[Linux] Todo: libinput touch device.");
+            }
+        }
+
+        void HandleDeviceRemoved(IntPtr context, IntPtr device)
+        {
+            if (LibInput.DeviceHasCapability(device, DeviceCapability.Keyboard))
+            {
+                int id = GetId(device);
+                Keyboards.Remove(id);
+            }
+        }
+
+        void HandleKeyboard(IntPtr context, IntPtr device)
+        {
+            int id = GetId(device);
+            KeyboardDevice keyboard = Keyboards.FromHardwareId(id);
+            if (keyboard != null)
+            {
+                // Todo: update keyboard state
+            }
+            else
+            {
+                Debug.Print("[Linux] libinput ignoring invalid device id {0}", id);
+            }
+        }
+
+        static int GetId(IntPtr device)
+        {
+            return LibInput.DeviceGetData(device).ToInt32();
+        }
+
         #endregion
 
         #region IKeyboardDriver2 implementation
 
         KeyboardState IKeyboardDriver2.GetState()
         {
-            return new KeyboardState();
+            KeyboardState state = new KeyboardState();
+            foreach (KeyboardDevice keyboard in Keyboards)
+            {
+                state.MergeBits(keyboard.State);
+            }
+            return state;
         }
 
         KeyboardState IKeyboardDriver2.GetState(int index)
         {
-            return new KeyboardState();
+            KeyboardDevice device = Keyboards.FromIndex(index);
+            if (device != null)
+            {
+                return device.State;
+            }
+            else
+            {
+                return new KeyboardState();
+            }
         }
 
         string IKeyboardDriver2.GetDeviceName(int index)
         {
-            return String.Empty;
+            KeyboardDevice device = Keyboards.FromIndex(index);
+            if (device != null)
+            {
+                return device.Name;
+            }
+            else
+            {
+                return String.Empty;
+            }
         }
 
         #endregion