duplicati/Duplicati/GUI/Duplicati.GUI.TrayIcon/Win32Window.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;

namespace Duplicati.GUI.TrayIcon
{
    public class Win32Window : IDisposable
    {
        private bool m_disposed;
        private IntPtr m_classAtom = IntPtr.Zero;
        private readonly IntPtr m_hInstance = Win32NativeWindow.GetModuleHandle(null);
        public delegate void MessageMonitorEventHandler(IntPtr hwnd, Win32NativeWindow.WindowsMessage message, IntPtr wParam, IntPtr lParam);
        public event MessageMonitorEventHandler MessageReceived;
        public IntPtr Handle { get; private set; }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        private void Dispose(bool disposing)
        {
            if (!m_disposed)
            {
                if (disposing)
                {
                    // free other managed objects that implement IDisposable only
                }

                // Dispose unmanaged resources
                DestroyWindow();
                m_disposed = true;
            }
        }

        public Win32Window()
        {
            Handle = IntPtr.Zero;
        }

        public void CreateWindow(string ClassName)
        {
            if (string.IsNullOrEmpty(ClassName))
                throw new ArgumentException("ClassName is null or empty");

            if (Handle != IntPtr.Zero | m_classAtom != IntPtr.Zero)
                return;

            Win32NativeWindow.WNDCLASSEX wc = new Win32NativeWindow.WNDCLASSEX
            {
                cbSize = Marshal.SizeOf(typeof(Win32NativeWindow.WNDCLASSEX)),
                lpfnWndProc = CustomWndProc,
                lpszClassName = ClassName,
                hInstance = m_hInstance
            };

            var atom = Win32NativeWindow.RegisterClassEx(ref wc);

            if (atom == 0)
                throw new System.ComponentModel.Win32Exception();

            m_classAtom = new IntPtr(atom);

            Handle = Win32NativeWindow.CreateWindowEx(0, m_classAtom,
                null, 0, 0, 0, 0, 0, IntPtr.Zero, IntPtr.Zero, m_hInstance, IntPtr.Zero);

            if (Handle == IntPtr.Zero)
                throw new System.ComponentModel.Win32Exception();

            //Send WM_SHOWWINDOW to create NotifyIcon
            Win32NativeWindow.ShowWindow(Handle, 1);
            Win32NativeWindow.ShowWindow(Handle, 0);

            var msg = new Win32NativeWindow.MSG();

            while (Win32NativeWindow.GetMessage(out msg, IntPtr.Zero, 0, 0))
            {
                Win32NativeWindow.TranslateMessage(ref msg);
                Win32NativeWindow.DispatchMessage(ref msg);
            }
        }

        public void DestroyWindow()
        {
            Win32NativeWindow.PostQuitMessage(0);

            if (Handle != IntPtr.Zero)
            {
                Win32NativeWindow.DestroyWindow(Handle);
                Handle = IntPtr.Zero;
            }

            if (m_classAtom != IntPtr.Zero)
            {
                Win32NativeWindow.UnregisterClass(m_classAtom, m_hInstance);
                m_classAtom = IntPtr.Zero;
            }
        }

        private IntPtr CustomWndProc(IntPtr hWnd, Win32NativeWindow.WindowsMessage msg, IntPtr wParam, IntPtr lParam)
        {
            MessageReceived?.Invoke(hWnd, msg, wParam, lParam);
            return Win32NativeWindow.DefWindowProc(hWnd, msg, wParam, lParam);
        }
    }
    public static class Win32NativeWindow
    {
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr CreateWindowEx(uint dwExStyle, IntPtr lpszClassName,
            string lpszWindowName, uint dwStyle, int x, int y, int nWidth, int nHeight,
            IntPtr hWndParent, IntPtr hMenu, IntPtr hInstance, IntPtr lpParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr DefWindowProc(IntPtr hWnd, WindowsMessage msg, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr DispatchMessage([In] ref MSG lpMsg);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern bool TranslateMessage([In] ref MSG lpMsg);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool GetMessage(out MSG msg, IntPtr hWnd, uint uMsgFilterMin, uint uMsgFilterMax);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern UInt16 RegisterClassEx(ref WNDCLASSEX lpWndClass);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool UnregisterClass(IntPtr lpClassName, IntPtr hInstance);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool DestroyWindow(IntPtr hWnd);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr GetModuleHandle(string lpModuleName);

        [DllImport("user32.dll")]
        public static extern void PostQuitMessage(int nExitCode);

        public delegate IntPtr WndProc(IntPtr hWnd, WindowsMessage msg, IntPtr wParam, IntPtr lParam);

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public struct WNDCLASSEX
        {
            public int cbSize;
            public uint style;
            public WndProc lpfnWndProc;
            public int cbClsExtra;
            public int cbWndExtra;
            public IntPtr hInstance;
            public IntPtr hIcon;
            public IntPtr hCursor;
            public IntPtr hbrBackground;
            public string lpszMenuName;
            public string lpszClassName;
            public IntPtr hIconSm;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct MSG
        {
            public IntPtr hwnd;
            public uint message;
            public IntPtr wParam;
            public IntPtr lParam;
            public int time;
            public POINT pt;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct POINT
        {
            public int x;
            public int y;
        }

        public enum WindowsMessage
        {
            WM_NULL = 0x0000,
            WM_CREATE = 0x0001,
            WM_DESTROY = 0x0002,
            WM_MOVE = 0x0003,
            WM_SIZE = 0x0005,
            WM_ACTIVATE = 0x0006,
            WM_SETFOCUS = 0x0007,
            WM_KILLFOCUS = 0x0008,
            WM_ENABLE = 0x000A,
            WM_SETREDRAW = 0x000B,
            WM_SETTEXT = 0x000C,
            WM_GETTEXT = 0x000D,
            WM_GETTEXTLENGTH = 0x000E,
            WM_PAINT = 0x000F,
            WM_CLOSE = 0x0010,
            WM_QUERYENDSESSION = 0x0011,
            WM_QUERYOPEN = 0x0013,
            WM_ENDSESSION = 0x0016,
            WM_QUIT = 0x0012,
            WM_ERASEBKGND = 0x0014,
            WM_SYSCOLORCHANGE = 0x0015,
            WM_SHOWWINDOW = 0x0018,
            WM_WININICHANGE = 0x001A,
            WM_SETTINGCHANGE = WM_WININICHANGE,
            WM_DEVMODECHANGE = 0x001B,
            WM_ACTIVATEAPP = 0x001C,
            WM_FONTCHANGE = 0x001D,
            WM_TIMECHANGE = 0x001E,
            WM_CANCELMODE = 0x001F,
            WM_SETCURSOR = 0x0020,
            WM_MOUSEACTIVATE = 0x0021,
            WM_CHILDACTIVATE = 0x0022,
            WM_QUEUESYNC = 0x0023,
            WM_GETMINMAXINFO = 0x0024,
            WM_PAINTICON = 0x0026,
            WM_ICONERASEBKGND = 0x0027,
            WM_NEXTDLGCTL = 0x0028,
            WM_SPOOLERSTATUS = 0x002A,
            WM_DRAWITEM = 0x002B,
            WM_MEASUREITEM = 0x002C,
            WM_DELETEITEM = 0x002D,
            WM_VKEYTOITEM = 0x002E,
            WM_CHARTOITEM = 0x002F,
            WM_SETFONT = 0x0030,
            WM_GETFONT = 0x0031,
            WM_SETHOTKEY = 0x0032,
            WM_GETHOTKEY = 0x0033,
            WM_QUERYDRAGICON = 0x0037,
            WM_COMPAREITEM = 0x0039,
            WM_GETOBJECT = 0x003D,
            WM_COMPACTING = 0x0041,
            WM_COMMNOTIFY = 0x0044,
            WM_WINDOWPOSCHANGING = 0x0046,
            WM_WINDOWPOSCHANGED = 0x0047,
            WM_POWER = 0x0048,
            WM_COPYDATA = 0x004A,
            WM_CANCELJOURNAL = 0x004B,
            WM_NOTIFY = 0x004E,
            WM_INPUTLANGCHANGEREQUEST = 0x0050,
            WM_INPUTLANGCHANGE = 0x0051,
            WM_TCARD = 0x0052,
            WM_HELP = 0x0053,
            WM_USERCHANGED = 0x0054,
            WM_NOTIFYFORMAT = 0x0055,
            WM_CONTEXTMENU = 0x007B,
            WM_STYLECHANGING = 0x007C,
            WM_STYLECHANGED = 0x007D,
            WM_DISPLAYCHANGE = 0x007E,
            WM_GETICON = 0x007F,
            WM_SETICON = 0x0080,
            WM_NCCREATE = 0x0081,
            WM_NCDESTROY = 0x0082,
            WM_NCCALCSIZE = 0x0083,
            WM_NCHITTEST = 0x0084,
            WM_NCPAINT = 0x0085,
            WM_NCACTIVATE = 0x0086,
            WM_GETDLGCODE = 0x0087,
            WM_SYNCPAINT = 0x0088,


            WM_NCMOUSEMOVE = 0x00A0,
            WM_NCLBUTTONDOWN = 0x00A1,
            WM_NCLBUTTONUP = 0x00A2,
            WM_NCLBUTTONDBLCLK = 0x00A3,
            WM_NCRBUTTONDOWN = 0x00A4,
            WM_NCRBUTTONUP = 0x00A5,
            WM_NCRBUTTONDBLCLK = 0x00A6,
            WM_NCMBUTTONDOWN = 0x00A7,
            WM_NCMBUTTONUP = 0x00A8,
            WM_NCMBUTTONDBLCLK = 0x00A9,
            WM_NCXBUTTONDOWN = 0x00AB,
            WM_NCXBUTTONUP = 0x00AC,
            WM_NCXBUTTONDBLCLK = 0x00AD,

            WM_INPUT_DEVICE_CHANGE = 0x00FE,
            WM_INPUT = 0x00FF,

            WM_KEYFIRST = 0x0100,
            WM_KEYDOWN = 0x0100,
            WM_KEYUP = 0x0101,
            WM_CHAR = 0x0102,
            WM_DEADCHAR = 0x0103,
            WM_SYSKEYDOWN = 0x0104,
            WM_SYSKEYUP = 0x0105,
            WM_SYSCHAR = 0x0106,
            WM_SYSDEADCHAR = 0x0107,
            WM_UNICHAR = 0x0109,
            WM_KEYLAST = 0x0109,

            WM_IME_STARTCOMPOSITION = 0x010D,
            WM_IME_ENDCOMPOSITION = 0x010E,
            WM_IME_COMPOSITION = 0x010F,
            WM_IME_KEYLAST = 0x010F,

            WM_INITDIALOG = 0x0110,
            WM_COMMAND = 0x0111,
            WM_SYSCOMMAND = 0x0112,
            WM_TIMER = 0x0113,
            WM_HSCROLL = 0x0114,
            WM_VSCROLL = 0x0115,
            WM_INITMENU = 0x0116,
            WM_INITMENUPOPUP = 0x0117,
            WM_MENUSELECT = 0x011F,
            WM_MENUCHAR = 0x0120,
            WM_ENTERIDLE = 0x0121,
            WM_MENURBUTTONUP = 0x0122,
            WM_MENUDRAG = 0x0123,
            WM_MENUGETOBJECT = 0x0124,
            WM_UNINITMENUPOPUP = 0x0125,
            WM_MENUCOMMAND = 0x0126,

            WM_CHANGEUISTATE = 0x0127,
            WM_UPDATEUISTATE = 0x0128,
            WM_QUERYUISTATE = 0x0129,

            WM_CTLCOLORMSGBOX = 0x0132,
            WM_CTLCOLOREDIT = 0x0133,
            WM_CTLCOLORLISTBOX = 0x0134,
            WM_CTLCOLORBTN = 0x0135,
            WM_CTLCOLORDLG = 0x0136,
            WM_CTLCOLORSCROLLBAR = 0x0137,
            WM_CTLCOLORSTATIC = 0x0138,
            MN_GETHMENU = 0x01E1,

            WM_MOUSEFIRST = 0x0200,
            WM_MOUSEMOVE = 0x0200,
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_LBUTTONDBLCLK = 0x0203,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205,
            WM_RBUTTONDBLCLK = 0x0206,
            WM_MBUTTONDOWN = 0x0207,
            WM_MBUTTONUP = 0x0208,
            WM_MBUTTONDBLCLK = 0x0209,
            WM_MOUSEWHEEL = 0x020A,
            WM_XBUTTONDOWN = 0x020B,
            WM_XBUTTONUP = 0x020C,
            WM_XBUTTONDBLCLK = 0x020D,
            WM_MOUSEHWHEEL = 0x020E,

            WM_PARENTNOTIFY = 0x0210,
            WM_ENTERMENULOOP = 0x0211,
            WM_EXITMENULOOP = 0x0212,

            WM_NEXTMENU = 0x0213,
            WM_SIZING = 0x0214,
            WM_CAPTURECHANGED = 0x0215,
            WM_MOVING = 0x0216,

            WM_POWERBROADCAST = 0x0218,

            WM_DEVICECHANGE = 0x0219,

            WM_MDICREATE = 0x0220,
            WM_MDIDESTROY = 0x0221,
            WM_MDIACTIVATE = 0x0222,
            WM_MDIRESTORE = 0x0223,
            WM_MDINEXT = 0x0224,
            WM_MDIMAXIMIZE = 0x0225,
            WM_MDITILE = 0x0226,
            WM_MDICASCADE = 0x0227,
            WM_MDIICONARRANGE = 0x0228,
            WM_MDIGETACTIVE = 0x0229,


            WM_MDISETMENU = 0x0230,
            WM_ENTERSIZEMOVE = 0x0231,
            WM_EXITSIZEMOVE = 0x0232,
            WM_DROPFILES = 0x0233,
            WM_MDIREFRESHMENU = 0x0234,

            WM_IME_SETCONTEXT = 0x0281,
            WM_IME_NOTIFY = 0x0282,
            WM_IME_CONTROL = 0x0283,
            WM_IME_COMPOSITIONFULL = 0x0284,
            WM_IME_SELECT = 0x0285,
            WM_IME_CHAR = 0x0286,
            WM_IME_REQUEST = 0x0288,
            WM_IME_KEYDOWN = 0x0290,
            WM_IME_KEYUP = 0x0291,

            WM_MOUSEHOVER = 0x02A1,
            WM_MOUSELEAVE = 0x02A3,
            WM_NCMOUSEHOVER = 0x02A0,
            WM_NCMOUSELEAVE = 0x02A2,

            WM_WTSSESSION_CHANGE = 0x02B1,

            WM_TABLET_FIRST = 0x02c0,
            WM_TABLET_LAST = 0x02df,

            WM_CUT = 0x0300,
            WM_COPY = 0x0301,
            WM_PASTE = 0x0302,
            WM_CLEAR = 0x0303,
            WM_UNDO = 0x0304,
            WM_RENDERFORMAT = 0x0305,
            WM_RENDERALLFORMATS = 0x0306,
            WM_DESTROYCLIPBOARD = 0x0307,
            WM_DRAWCLIPBOARD = 0x0308,
            WM_PAINTCLIPBOARD = 0x0309,
            WM_VSCROLLCLIPBOARD = 0x030A,
            WM_SIZECLIPBOARD = 0x030B,
            WM_ASKCBFORMATNAME = 0x030C,
            WM_CHANGECBCHAIN = 0x030D,
            WM_HSCROLLCLIPBOARD = 0x030E,
            WM_QUERYNEWPALETTE = 0x030F,
            WM_PALETTEISCHANGING = 0x0310,
            WM_PALETTECHANGED = 0x0311,
            WM_HOTKEY = 0x0312,

            WM_PRINT = 0x0317,
            WM_PRINTCLIENT = 0x0318,

            WM_APPCOMMAND = 0x0319,

            WM_THEMECHANGED = 0x031A,

            WM_CLIPBOARDUPDATE = 0x031D,

            WM_DWMCOMPOSITIONCHANGED = 0x031E,
            WM_DWMNCRENDERINGCHANGED = 0x031F,
            WM_DWMCOLORIZATIONCOLORCHANGED = 0x0320,
            WM_DWMWINDOWMAXIMIZEDCHANGE = 0x0321,

            WM_GETTITLEBARINFOEX = 0x033F,

            WM_HANDHELDFIRST = 0x0358,
            WM_HANDHELDLAST = 0x035F,

            WM_AFXFIRST = 0x0360,
            WM_AFXLAST = 0x037F,

            WM_PENWINFIRST = 0x0380,
            WM_PENWINLAST = 0x038F,

            WM_APP = 0x8000,

            WM_USER = 0x0400,

            NIN_BALLOONUSERCLICK = 1029,

            WM_REFLECT = WM_USER + 0x1C00,
        }
    }
}