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XI2MouseKeyboard.cs
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XI2MouseKeyboard.cs
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#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2010 the Open Toolkit library.
//
// 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;
using System.Runtime.InteropServices;
using System.Threading;
using OpenTK.Input;
namespace OpenTK.Platform.X11
{
sealed class XI2MouseKeyboard : IKeyboardDriver2, IMouseDriver2, IDisposable
{
const XEventName ExitEvent = XEventName.LASTEvent + 1;
readonly object Sync = new object();
readonly Thread ProcessingThread;
readonly X11KeyMap KeyMap;
bool disposed;
class XIMouse
{
public MouseState State;
public XIDeviceInfo DeviceInfo;
public XIScrollClassInfo ScrollX = new XIScrollClassInfo { number = -1 };
public XIScrollClassInfo ScrollY = new XIScrollClassInfo { number = -1 };
public XIValuatorClassInfo MotionX = new XIValuatorClassInfo { number = -1 };
public XIValuatorClassInfo MotionY = new XIValuatorClassInfo { number = -1 };
public string Name;
}
class XIKeyboard
{
public KeyboardState State;
public XIDeviceInfo DeviceInfo;
public string Name;
}
// Atoms
//static readonly IntPtr ButtonLeft;
//static readonly IntPtr ButtonMiddle;
////static readonly IntPtr ButtonRight;
//static readonly IntPtr ButtonWheelUp;
//static readonly IntPtr ButtonWheelDown;
//static readonly IntPtr ButtonWheelLeft;
//static readonly IntPtr ButtonWheelRight;
static readonly IntPtr RelX;
static readonly IntPtr RelY;
//static readonly IntPtr RelHorizScroll;
//static readonly IntPtr RelVertScroll;
//static readonly IntPtr RelHorizWheel;
//static readonly IntPtr RelVertWheel;
long cursor_x, cursor_y; // For GetCursorState()
List<XIMouse> devices = new List<XIMouse>(); // list of connected mice
Dictionary<int, int> rawids = new Dictionary<int, int>(); // maps hardware device ids to XIMouse ids
List<XIKeyboard> keyboards = new List<XIKeyboard>(); // list of connected keybords
Dictionary<int, int> keyboard_ids = new Dictionary<int, int>(); // maps hardware device ids to XIKeyboard ids
internal readonly X11WindowInfo window;
internal static int XIOpCode { get; private set; }
internal static int XIVersion { get; private set; }
static readonly Functions.EventPredicate PredicateImpl = IsEventValid;
readonly IntPtr Predicate = Marshal.GetFunctionPointerForDelegate(PredicateImpl);
static XI2MouseKeyboard()
{
using (new XLock(API.DefaultDisplay))
{
// Mouse
//ButtonLeft = Functions.XInternAtom(API.DefaultDisplay, "Button Left", false);
//ButtonMiddle = Functions.XInternAtom(API.DefaultDisplay, "Button Middle", false);
//ButtonRight = Functions.XInternAtom(API.DefaultDisplay, "Button Right", false);
//ButtonWheelUp = Functions.XInternAtom(API.DefaultDisplay, "Button Wheel Up", false);
//ButtonWheelDown = Functions.XInternAtom(API.DefaultDisplay, "Button Wheel Down", false);
//ButtonWheelLeft = Functions.XInternAtom(API.DefaultDisplay, "Button Horiz Wheel Left", false);
//ButtonWheelRight = Functions.XInternAtom(API.DefaultDisplay, "Button Horiz Wheel Right", false);
RelX = Functions.XInternAtom(API.DefaultDisplay, "Rel X", false);
RelY = Functions.XInternAtom(API.DefaultDisplay, "Rel Y", false);
//RelHorizWheel = Functions.XInternAtom(API.DefaultDisplay, "Rel Horiz Wheel", false);
//RelVertWheel = Functions.XInternAtom(API.DefaultDisplay, "Rel Vert Wheel", false);
//RelHorizScroll = Functions.XInternAtom(API.DefaultDisplay, "Rel Horiz Scroll", false);
//RelVertScroll = Functions.XInternAtom(API.DefaultDisplay, "Rel Vert Scroll", false);
// Multitouch
//TouchX = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Position X", false);
//TouchY = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Position Y", false);
//TouchMajor = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Touch Major", false);
//TouchMinor = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Touch Minor", false);
//TouchPressure = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Pressure", false);
//TouchId = Functions.XInternAtom(API.DefaultDisplay, "Abs MT Tracking ID", false);
//TouchMaxContacts = Functions.XInternAtom(API.DefaultDisplay, "Max Contacts", false);
}
}
public XI2MouseKeyboard()
{
window = new X11WindowInfo();
window.Display = Functions.XOpenDisplay(IntPtr.Zero);
using (new XLock(window.Display))
{
window.Screen = Functions.XDefaultScreen(window.Display);
window.RootWindow = Functions.XRootWindow(window.Display, window.Screen);
window.Handle = window.RootWindow;
KeyMap = new X11KeyMap(window.Display);
}
if (!IsSupported(window.Display))
throw new NotSupportedException("XInput2 not supported.");
using (new XLock(window.Display))
using (XIEventMask mask = new XIEventMask(1,
XIEventMasks.RawKeyPressMask |
XIEventMasks.RawKeyReleaseMask |
XIEventMasks.RawButtonPressMask |
XIEventMasks.RawButtonReleaseMask |
XIEventMasks.RawMotionMask |
XIEventMasks.MotionMask |
XIEventMasks.DeviceChangedMask |
(XIEventMasks)(1 << (int)ExitEvent)))
{
XI.SelectEvents(window.Display, window.Handle, mask);
UpdateDevices();
}
ProcessingThread = new Thread(ProcessEvents);
ProcessingThread.IsBackground = true;
ProcessingThread.Start();
}
// Checks whether XInput2 is supported on the specified display.
// If a display is not specified, the default display is used.
internal static bool IsSupported(IntPtr display)
{
try
{
if (display == IntPtr.Zero)
{
display = API.DefaultDisplay;
}
using (new XLock(display))
{
int major, ev, error;
if (Functions.XQueryExtension(display, "XInputExtension", out major, out ev, out error) != 0)
{
XIOpCode = major;
int minor = 2;
while (minor >= 0)
{
if (XI.QueryVersion(display, ref major, ref minor) == ErrorCodes.Success)
{
XIVersion = major * 100 + minor * 10;
return true;
}
minor--;
}
}
}
}
catch (DllNotFoundException e)
{
Debug.Print(e.ToString());
Debug.Print("XInput2 extension not supported. Mouse support will suffer.");
}
return false;
}
#region IKeyboardDriver2 Members
KeyboardState IKeyboardDriver2.GetState()
{
lock (Sync)
{
KeyboardState state = new KeyboardState();
foreach (XIKeyboard k in keyboards)
{
state.MergeBits(k.State);
}
return state;
}
}
KeyboardState IKeyboardDriver2.GetState(int index)
{
lock (Sync)
{
if (index >= 0 && index < keyboards.Count)
{
return keyboards[index].State;
}
return new KeyboardState();
}
}
string IKeyboardDriver2.GetDeviceName(int index)
{
lock (Sync)
{
if (index >= 0 && index < keyboards.Count)
{
return keyboards[index].Name;
}
return String.Empty;
}
}
#endregion
#region IMouseDriver2 Members
MouseState IMouseDriver2.GetState()
{
lock (Sync)
{
MouseState master = new MouseState();
foreach (var d in devices)
{
master.MergeBits(d.State);
}
return master;
}
}
MouseState IMouseDriver2.GetState(int index)
{
lock (Sync)
{
if (index >= 0 && index < devices.Count)
{
return devices[index].State;
}
return new MouseState();
}
}
MouseState IMouseDriver2.GetCursorState()
{
lock (Sync)
{
MouseState master = (this as IMouseDriver2).GetState();
master.X = (int)Interlocked.Read(ref cursor_x);
master.Y = (int)Interlocked.Read(ref cursor_y);
return master;
}
}
void IMouseDriver2.SetPosition(double x, double y)
{
// Note: we cannot use window.Display here, because
// that will deadlock the input thread, which is
// blocking inside XIfEvent
using (new XLock(API.DefaultDisplay))
{
Functions.XWarpPointer(API.DefaultDisplay,
IntPtr.Zero, window.RootWindow, 0, 0, 0, 0, (int)x, (int)y);
Functions.XFlush(API.DefaultDisplay);
Interlocked.Exchange(ref cursor_x, (long)x);
Interlocked.Exchange(ref cursor_y, (long)y);
}
}
#endregion
#region Private Members
void UpdateDevices()
{
lock (Sync)
{
devices.Clear();
keyboards.Clear();
int count;
unsafe
{
XIDeviceInfo* list = (XIDeviceInfo*)XI.QueryDevice(window.Display,
XI.XIAllDevices, out count);
Debug.Print("Refreshing input device list");
Debug.Print("{0} input devices detected", count);
for (int i = 0; i < count; i++)
{
switch ((list + i)->use)
{
case XIDeviceType.MasterKeyboard:
//case XIDeviceType.SlaveKeyboard:
{
XIKeyboard k = new XIKeyboard();
k.DeviceInfo = *(list + i);
k.State.SetIsConnected(k.DeviceInfo.enabled);
k.Name = Marshal.PtrToStringAnsi(k.DeviceInfo.name);
int id = k.DeviceInfo.deviceid;
if (!keyboard_ids.ContainsKey(id))
{
keyboard_ids.Add(k.DeviceInfo.deviceid, 0);
}
keyboard_ids[id] = keyboards.Count;
keyboards.Add(k);
}
break;
case XIDeviceType.MasterPointer:
//case XIDeviceType.SlavePointer:
case XIDeviceType.FloatingSlave:
{
XIMouse d = new XIMouse();
d.DeviceInfo = *(list + i);
d.State.SetIsConnected(d.DeviceInfo.enabled);
d.Name = Marshal.PtrToStringAnsi(d.DeviceInfo.name);
Debug.Print("Device {0} \"{1}\" is {2} and has:",
i, d.Name, d.DeviceInfo.enabled ? "enabled" : "disabled");
// Decode the XIDeviceInfo to axes, buttons and scroll types
for (int j = 0; j < d.DeviceInfo.num_classes; j++)
{
XIAnyClassInfo* class_info = *((XIAnyClassInfo**)d.DeviceInfo.classes + j);
switch (class_info->type)
{
case XIClassType.Button:
{
XIButtonClassInfo* button = (XIButtonClassInfo*)class_info;
Debug.Print("\t{0} buttons", button->num_buttons);
}
break;
case XIClassType.Scroll:
{
XIScrollClassInfo* scroll = (XIScrollClassInfo*)class_info;
switch (scroll->scroll_type)
{
case XIScrollType.Vertical:
Debug.WriteLine("\tSmooth vertical scrolling");
d.ScrollY = *scroll;
break;
case XIScrollType.Horizontal:
Debug.WriteLine("\tSmooth horizontal scrolling");
d.ScrollX = *scroll;
break;
default:
Debug.Print("\tUnknown scrolling type {0}", scroll->scroll_type);
break;
}
}
break;
case XIClassType.Valuator:
{
XIValuatorClassInfo* valuator = (XIValuatorClassInfo*)class_info;
if (valuator->label == RelX)
{
Debug.WriteLine("\tRelative X movement");
d.MotionX = *valuator;
}
else if (valuator->label == RelY)
{
Debug.WriteLine("\tRelative Y movement");
d.MotionY = *valuator;
}
}
break;
}
}
// Map the hardware device id to the current XIMouse id
int id = d.DeviceInfo.deviceid;
if (!rawids.ContainsKey(id))
{
rawids.Add(id, 0);
}
rawids[id] = devices.Count;
devices.Add(d);
}
break;
}
}
XI.FreeDeviceInfo((IntPtr)list);
}
}
}
void ProcessEvents()
{
while (!disposed)
{
XEvent e = new XEvent();
XGenericEventCookie cookie;
using (new XLock(window.Display))
{
Functions.XIfEvent(window.Display, ref e, Predicate, new IntPtr(XIOpCode));
if (e.type == ExitEvent)
{
return;
}
IntPtr dummy;
int x, y, dummy2;
Functions.XQueryPointer(window.Display, window.RootWindow,
out dummy, out dummy, out x, out y,
out dummy2, out dummy2, out dummy2);
Interlocked.Exchange(ref cursor_x, (long)x);
Interlocked.Exchange(ref cursor_y, (long)y);
cookie = e.GenericEventCookie;
if (Functions.XGetEventData(window.Display, ref cookie) != 0)
{
switch ((XIEventType)cookie.evtype)
{
case XIEventType.Motion:
// Nothing to do
break;
case XIEventType.RawKeyPress:
case XIEventType.RawKeyRelease:
case XIEventType.RawMotion:
case XIEventType.RawButtonPress:
case XIEventType.RawButtonRelease:
// Delivered to all XIMouse instances
ProcessRawEvent(ref cookie);
break;
case XIEventType.DeviceChanged:
UpdateDevices();
break;
}
}
Functions.XFreeEventData(window.Display, ref cookie);
}
}
}
void ProcessRawEvent(ref XGenericEventCookie cookie)
{
lock (Sync)
{
unsafe
{
XIRawEvent raw = *(XIRawEvent*)cookie.data;
XIMouse mouse;
XIKeyboard keyboard;
switch (raw.evtype)
{
case XIEventType.RawMotion:
if (GetMouseDevice(raw.deviceid, out mouse))
{
ProcessRawMotion(mouse, ref raw);
}
break;
case XIEventType.RawButtonPress:
case XIEventType.RawButtonRelease:
if (GetMouseDevice(raw.deviceid, out mouse))
{
float dx, dy;
MouseButton button = X11KeyMap.TranslateButton(raw.detail, out dx, out dy);
mouse.State[button] = raw.evtype == XIEventType.RawButtonPress;
}
break;
case XIEventType.RawKeyPress:
case XIEventType.RawKeyRelease:
if (GetKeyboardDevice(raw.deviceid, out keyboard))
{
Key key;
if (KeyMap.TranslateKey(raw.detail, out key))
{
keyboard.State[key] = raw.evtype == XIEventType.RawKeyPress;
}
}
break;
}
}
}
}
bool GetMouseDevice(int deviceid, out XIMouse mouse)
{
if (!rawids.ContainsKey(deviceid))
{
Debug.Print("Unknown mouse device {0} encountered, ignoring.", deviceid);
mouse = null;
return false;
}
mouse = devices[rawids[deviceid]];
return true;
}
bool GetKeyboardDevice(int deviceid, out XIKeyboard keyboard)
{
if (!keyboard_ids.ContainsKey(deviceid))
{
Debug.Print("Unknown keyboard device {0} encountered, ignoring.", deviceid);
keyboard = null;
return false;
}
keyboard = keyboards[keyboard_ids[deviceid]];
return true;
}
unsafe static void ProcessRawMotion(XIMouse d, ref XIRawEvent raw)
{
// Note: we use the raw values here, without pointer
// ballistics and any other modification.
double x = ReadRawValue(ref raw, d.MotionX.number);
double y = ReadRawValue(ref raw, d.MotionY.number);
double h = ReadRawValue(ref raw, d.ScrollX.number) / d.ScrollX.increment;
double v = ReadRawValue(ref raw, d.ScrollY.number) / d.ScrollY.increment;
d.State.X += (int)Math.Round(x);
d.State.Y += (int)Math.Round(y);
d.State.SetScrollRelative((float)h, (float)v);
}
unsafe static double ReadRawValue(ref XIRawEvent raw, int bit)
{
double value = 0;
if (IsBitSet(raw.valuators.mask, bit))
{
// Find the offset where this value is stored.
// The offset is equal to the number of bits
// set in raw.valuators.mask between [0, bit)
int offset = 0;
for (int i = 0; i < bit; i++)
{
if (IsBitSet(raw.valuators.mask, i))
{
offset++;
}
}
value = *((double*)raw.raw_values + offset);
}
return value;
}
static bool IsEventValid(IntPtr display, ref XEvent e, IntPtr arg)
{
bool valid = false;
if ((long)e.GenericEventCookie.extension == arg.ToInt64())
{
valid |= e.GenericEventCookie.evtype == (int)XIEventType.RawKeyPress;
valid |= e.GenericEventCookie.evtype == (int)XIEventType.RawKeyRelease;
valid |= e.GenericEventCookie.evtype == (int)XIEventType.RawMotion;
valid |= e.GenericEventCookie.evtype == (int)XIEventType.RawButtonPress;
valid |= e.GenericEventCookie.evtype == (int)XIEventType.RawButtonRelease;
valid |= e.GenericEventCookie.evtype == (int)XIEventType.DeviceChanged;
}
valid |= e.AnyEvent.type == ExitEvent;
return valid;
}
static bool IsBitSet(IntPtr mask, int bit)
{
unsafe
{
return bit >= 0 && (*((byte*)mask + (bit >> 3)) & (1 << (bit & 7))) != 0;
}
}
#endregion
#region IDisposable Members
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
using (new XLock(API.DefaultDisplay))
{
XEvent e = new XEvent();
e.type = ExitEvent;
Functions.XSendEvent(API.DefaultDisplay, window.Handle, false, IntPtr.Zero, ref e);
Functions.XFlush(API.DefaultDisplay);
}
}
disposed = true;
}
}
~XI2MouseKeyboard()
{
Dispose(false);
}
#endregion
}
}