Squashed 'NHotkey/' content from commit e16cceb

git-subtree-dir: NHotkey
git-subtree-split: e16cceb7b3e108413d409dbf355a67835822a5e7

NHotkey/Hotkey.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace NHotkey
+{
+    internal class Hotkey
+    {
+        private static int _nextId;
+
+        private readonly int _id;
+        private readonly uint _virtualKey;
+        private readonly HotkeyFlags _flags;
+        private readonly EventHandler<HotkeyEventArgs> _handler;
+
+        public Hotkey(uint virtualKey, HotkeyFlags flags, EventHandler<HotkeyEventArgs> handler)
+        {
+            _id = ++_nextId;
+            _virtualKey = virtualKey;
+            _flags = flags;
+            _handler = handler;
+        }
+
+        public int Id
+        {
+            get { return _id; }
+        }
+
+        public uint VirtualKey
+        {
+            get { return _virtualKey; }
+        }
+
+        public HotkeyFlags Flags
+        {
+            get { return _flags; }
+        }
+
+        public EventHandler<HotkeyEventArgs> Handler
+        {
+            get { return _handler; }
+        }
+
+        private IntPtr _hwnd;
+
+        public void Register(IntPtr hwnd, string name)
+        {
+            if (!NativeMethods.RegisterHotKey(hwnd, _id, _flags, _virtualKey))
+            {
+                var hr = Marshal.GetHRForLastWin32Error();
+                var ex = Marshal.GetExceptionForHR(hr);
+                if ((uint) hr == 0x80070581)
+                    throw new HotkeyAlreadyRegisteredException(name, ex);
+                throw ex;
+            }
+            _hwnd = hwnd;
+        }
+
+        public void Unregister()
+        {
+            if (_hwnd != IntPtr.Zero)
+            {
+                if (!NativeMethods.UnregisterHotKey(_hwnd, _id))
+                {
+                    var hr = Marshal.GetHRForLastWin32Error();
+                    throw Marshal.GetExceptionForHR(hr);
+                }
+                _hwnd = IntPtr.Zero;
+            }
+        }
+    }
+}