/// <summary>
/// Converts a list of hook events to string
/// </summary>
/// <param name="args">List of HookEventArgs objects</param>
/// <returns>String representing the list of events</returns>
public static string HookEventsToString(HookEventArgs[] args)
{
string eventStr = "";
foreach (HookEventArgs arg in args)
{
string str = "";
if ((arg as MouseHookEventArgsEx) != null)
{
MouseHookEventArgsEx e = arg as MouseHookEventArgsEx;
switch (e.Type)
{
case HookEventCodec.EventType.MouseDown:
str = String.Format("[Mouse Down: {0} | {1},{2} : {3}]", e.Button.ToString(), e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.MouseClick:
str = String.Format("[Mouse Click: {0}#{1} | {2},{3} : {4}]", e.Button.ToString(), e.ClickCount, e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.MouseDoubleClick:
str = String.Format("[Double Click: {0} | {1},{2} : {3}]", e.Button.ToString(), e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.MouseUp:
str = String.Format("[Mouse Up: {0} | {1},{2} : {3}]", e.Button.ToString(), e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.MouseMove:
str = String.Format("[Mouse Move | {0},{1} : {2}]", e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.MouseWheel:
str = String.Format("[Mouse Scroll: {0} | {1},{2} : {3}]", e.ScrollAmount, e.Location.X, e.Location.Y, HookEventHelper.GetModifierString(e));
break;
}
}
else if ((arg as KeyHookEventArgsEx) != null)
{
KeyHookEventArgsEx e = arg as KeyHookEventArgsEx;
List<string> pKeys = new List<string>();
foreach (byte b in e.PressedKeys)
if (b != 0)
pKeys.Add(((Keys)b).ToString());
switch (e.Type)
{
case HookEventCodec.EventType.KeyDown:
str = String.Format("[Down: {0} : {1}]", String.Join(" + ", pKeys.ToArray()), HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.KeyPress:
str = String.Format("[{0} : {1}]", String.Join(" + ", pKeys.ToArray()), HookEventHelper.GetModifierString(e));
break;
case HookEventCodec.EventType.KeyUp:
str = String.Format("[Up: {0} : {1}]", String.Join(" + ", pKeys.ToArray()), HookEventHelper.GetModifierString(e));
break;
}
if (e.KeyChar != '\0')
str += e.KeyChar;
}
str.Trim();
if (str != "")
eventStr += str + Environment.NewLine;
}
return eventStr.Trim();
}
/// <summary>
/// Serializes the header byte
/// </summary>
/// <param name="ec">Event class</param>
/// <param name="et">Event type</param>
/// <param name="ha">Event args</param>
/// <returns>Header byte</returns>
private static byte GetHeaderByte(EventClass ec, EventType et, HookEventArgs ha)
{
byte head = 0;
if (ec == EventClass.MouseEvent)
{
head = 0x80;
}
head |= (byte)((uint)et << 4);
if (ha.Alt)
{
head |= 0x08;
}
if (ha.Control)
{
head |= 0x04;
}
if (ha.Shift)
{
head |= 0x02;
}
if (ha.CapsLock)
{
head |= 0x01;
}
return(head);
}
/// <summary>
/// Serializes the events
/// </summary>
/// <param name="eventClass">Event class</param>
/// <param name="type">Type of event</param>
/// <param name="args">KeyHookEventArgs or MouseHookEventArgs object</param>
/// <param name="pressedKeys">Upto 3 consecutively pressed keys</param>
/// <param name="pressedChar">Pressed character</param>
/// <returns>Data bytes</returns>
public static byte[] GetEncodedData(EventClass eventClass, EventType type, HookEventArgs args, int[] pressedKeys = null, char pressedChar = '\0')
{
byte[] data = null;
using (MemoryStream ms = new MemoryStream())
{
ms.WriteByte(GetHeaderByte(eventClass, type, args));
if (eventClass == EventClass.MouseEvent)
{
MouseHookEventArgs me = args as MouseHookEventArgs;
ms.Write(BitConverter.GetBytes((ushort)me.Location.X), 0, 2);
ms.Write(BitConverter.GetBytes((ushort)me.Location.Y), 0, 2);
//ms.WriteByte((byte)me.Location.X);
//ms.WriteByte((byte)me.Location.Y);
//System.Windows.Forms.MouseButtons.Right;
ms.WriteByte((byte)((int)me.Button >> 20));
byte extra = 0;
switch (type)
{
case EventType.MouseClick:
case EventType.MouseDoubleClick:
extra = (byte)me.ClickCount;
break;
case EventType.MouseWheel:
extra = (byte)Math.Abs(me.ScrollAmount);
if (me.ScrollAmount < 0)
{
extra |= 0x80;
}
break;
}
ms.WriteByte(extra);
}
else
{
KeyHookEventArgs ke = args as KeyHookEventArgs;
byte[] pKeys = { 0, 0, 0 };
if (pressedKeys == null || pressedKeys.Length == 0)
{
throw new ArgumentException("Atleast one key should be in pressed keys.");
}
int len = Math.Min(3, pressedKeys.Length);
for (int i = 0; i < len; i++)
{
pKeys[i] = (byte)pressedKeys[i];
}
ms.Write(pKeys, 0, 3);
ms.WriteByte((byte)pressedChar);
}
data = ms.ToArray();
}
return(data);
}
/// <summary>
/// Get modifier string consisting of Alt, Ctrl, Shift and Caps Lock
/// </summary>
/// <param name="ha">HookEventArgs object</param>
/// <returns>Modifier string</returns>
public static string GetModifierString(HookEventArgs ha)
{
string str = "";
if (ha.Alt)
str += "Alt + ";
if (ha.Control)
str += "Ctrl + ";
if (ha.Shift)
str += "Shift + ";
if (ha.CapsLock)
str += "CapsLock + ";
return str.TrimEnd(new char[] { ' ', '+' });
}
/// <summary>
/// Deserializes the header byte
/// </summary>
/// <param name="head">Received byte</param>
/// <param name="ec">Decoded event class</param>
/// <param name="et">Decoded event type</param>
/// <param name="ha">Decoded event args</param>
private static void FromHeaderByte(byte head, out EventClass ec, out EventType et, out HookEventArgs ha)
{
if ((head & 0x80) == 0x80)
{
ec = EventClass.MouseEvent;
}
else
{
ec = EventClass.KeyEvent;
}
et = (EventType)((head & 0x70) >> 4);
ha = new HookEventArgs((head & 0x08) == 0x08, (head & 0x04) == 0x04, (head & 0x02) == 0x02, (head & 0x01) == 0x01, false, false);
}
/// <summary>
/// Deserializes the data bytes
/// </summary>
/// <param name="offset">Starting position in stream</param>
/// <param name="data">Received Data bytes</param>
/// <param name="eventClass">Decoded event class</param>
/// <param name="type">Decoded event type</param>
/// <param name="args">Decoded HookEventArgs</param>
/// <param name="pressedKeys">Upto 3 consecutively pressed decoded keys</param>
/// <param name="pressedChar">Decoded pressed character</param>
/// <returns>True if stream is not empty, else false</returns>
public static bool GetDecodedData(int offset, byte[] data, out EventClass eventClass, out EventType type, out HookEventArgs args, out byte[] pressedKeys, out char pressedChar)
{
using (MemoryStream ms = new MemoryStream(data))
{
// Set Offset
ms.Position = offset;
// Assign
pressedKeys = null;
pressedChar = '\0';
eventClass = EventClass.None;
type = EventType.None;
args = null;
// Check
if (ms.Position < ms.Length)
{
FromHeaderByte((byte)ms.ReadByte(), out eventClass, out type, out args);
pressedKeys = new byte[3] {
0, 0, 0
};
if (eventClass == EventClass.MouseEvent)
{
//int x = ms.ReadByte();
//int y = ms.ReadByte();
byte[] loc = new byte[2];
ms.Read(loc, 0, 2);
int x = BitConverter.ToInt16(loc, 0);
ms.Read(loc, 0, 2);
int y = BitConverter.ToInt16(loc, 0);
System.Windows.Forms.MouseButtons button = System.Windows.Forms.MouseButtons.None;
switch (ms.ReadByte())
{
case 1:
button = System.Windows.Forms.MouseButtons.Left;
break;
case 2:
button = System.Windows.Forms.MouseButtons.Right;
break;
case 4:
button = System.Windows.Forms.MouseButtons.Middle;
break;
case 8:
button = System.Windows.Forms.MouseButtons.XButton1;
break;
case 16:
button = System.Windows.Forms.MouseButtons.XButton2;
break;
}
int extra = ms.ReadByte();
int click = 0;
int scroll = 0;
switch (type)
{
case EventType.MouseClick:
case EventType.MouseDoubleClick:
click = extra;
break;
case EventType.MouseWheel:
if ((extra & 0x80) == 0x80)
{
scroll = -1;
}
else
{
scroll = 1;
}
extra &= 0x7F;
scroll = scroll * extra * 120; //Delta
break;
}
args = new MouseHookEventArgs(false, button, click, x, y, scroll, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
else
{
ms.Read(pressedKeys, 0, 3);
pressedChar = (char)ms.ReadByte();
args = new KeyHookEventArgs(pressedKeys[0], pressedChar, false, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
return(true);
}
}
return(false);
}
