// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
// 
// 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.

using System;
using System.Text;
using System.Runtime.InteropServices;

namespace ICSharpCode.ILSpy
{
	static class NativeMethods
	{
		public const uint WM_COPYDATA = 0x4a;
		
		[DllImport("user32.dll", CharSet = CharSet.Auto)]
		[return: MarshalAs(UnmanagedType.Bool)]
		internal static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);
		
		[DllImport("user32.dll", CharSet = CharSet.Auto)]
		static extern int GetWindowText(IntPtr hWnd, [Out] StringBuilder title, int size);
		
		public static string GetWindowText(IntPtr hWnd, int maxLength)
		{
			StringBuilder b = new StringBuilder(maxLength + 1);
			if (GetWindowText(hWnd, b, b.Capacity) != 0)
				return b.ToString();
			else
				return string.Empty;
		}
		
		[DllImport("user32.dll", CharSet = CharSet.Auto)]
		internal static extern IntPtr SendMessageTimeout(
			IntPtr hWnd, uint msg, IntPtr wParam, ref CopyDataStruct lParam,
			uint flags, uint timeout, out IntPtr result);
		
		[DllImport("user32.dll", CharSet = CharSet.Auto)]
		[return: MarshalAs(UnmanagedType.Bool)]
		internal static extern bool SetForegroundWindow(IntPtr hWnd);
	}
	
	[return: MarshalAs(UnmanagedType.Bool)]
	delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
	
	[StructLayout(LayoutKind.Sequential)]
	struct CopyDataStruct
	{
		public IntPtr Padding;
		public int Size;
		public IntPtr Buffer;

		public CopyDataStruct(IntPtr padding, int size, IntPtr buffer)
		{
			this.Padding = padding;
			this.Size = size;
			this.Buffer = buffer;
		}
	}
}