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

namespace HYDragCurveJig
{
    public class KeyboardHook
    {
        [DllImport("user32.dll")]
        private static extern int SetWindowsHookEx(int int_1, KeyboardHook.Delegate0 delegate0_1, IntPtr intptr_0, int int_2);

        [DllImport("user32.dll")]
        private static extern bool UnhookWindowsHookEx(int int_1);

        [DllImport("user32.dll")]
        private static extern int CallNextHookEx(int int_1, int int_2, int int_3, IntPtr intptr_0);

        [DllImport("kernel32.dll")]
        public static extern IntPtr GetModuleHandle(string lpModuleName);

        [DllImport("kernel32.dll")]
        public static extern int GetCurrentThreadId();

        public void HookStart()
        {
            if (KeyboardHook.int_0 == 0)
            {
                this.delegate0_0 = new KeyboardHook.Delegate0(this.wTayyEwCc1);
                IntPtr zero = IntPtr.Zero;
                KeyboardHook.int_0 = KeyboardHook.SetWindowsHookEx(13, this.delegate0_0, zero, 0);
                if (KeyboardHook.int_0 == 0)
                {
                    this.HookStop();
                    throw new Exception("SetWindowsHookEx failed.");
                }
            }
        }

        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll")]
        private static extern int GetWindowText(IntPtr intptr_0, StringBuilder stringBuilder_0, int int_1);

        private string method_0()
        {
            StringBuilder stringBuilder = new StringBuilder(256);
            if (KeyboardHook.GetWindowText(KeyboardHook.GetForegroundWindow(), stringBuilder, 256) > 0)
            {
                return stringBuilder.ToString();
            }
            return null;
        }

        private int wTayyEwCc1(int int_1, int int_2, IntPtr intptr_0)
        {
            if (int_1 >= 0 && ((KeyboardHook.KeyBoardHookStruct)Marshal.PtrToStructure(intptr_0, typeof(KeyboardHook.KeyBoardHookStruct))).vkCode == 32 && this.method_0().IndexOf("Revit") != -1)
            {
                return 1;
            }
            return KeyboardHook.CallNextHookEx(KeyboardHook.int_0, int_1, int_2, intptr_0);
        }

        public void HookStop()
        {
            bool flag = true;
            if (KeyboardHook.int_0 != 0)
            {
                flag = KeyboardHook.UnhookWindowsHookEx(KeyboardHook.int_0);
                KeyboardHook.int_0 = 0;
            }
            if (!flag)
            {
                throw new Exception("UnhookWindowsHookEx failed.");
            }
        }

        private static int int_0;

        private KeyboardHook.Delegate0 delegate0_0;

        [StructLayout(LayoutKind.Sequential)]
        public class KeyBoardHookStruct
        {
            public int vkCode;

            public int scanCode;

            public int flags;

            public int time;

            public int dwExtraInfo;
        }

        private delegate int Delegate0(int nCode, int wParam, IntPtr lParam);
    }
}