Initial TaskbarLauncher release baseline

2026-06-02 17:28:25 -04:00
commit e8c0721c39
18 changed files with 2566 additions and 0 deletions
--- a/Services/HotkeyService.cs
+++ b/Services/HotkeyService.cs
@@ -0,0 +1,116 @@
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Interop;
+
+namespace TaskbarLauncher.Services;
+
+public sealed class HotkeyService : IDisposable
+{
+    private const int WmHotkey = 0x0312;
+    private const int HotkeyId = 9001;
+
+    private HwndSource? source;
+    private Window? window;
+
+    public event EventHandler? Pressed;
+
+    public void Register(string hotkey)
+    {
+        Unregister();
+
+        window = new Window
+        {
+            Width = 0,
+            Height = 0,
+            ShowInTaskbar = false,
+            WindowStyle = WindowStyle.None,
+            AllowsTransparency = true,
+            Opacity = 0,
+            Left = -10000,
+            Top = -10000
+        };
+
+        window.SourceInitialized += (_, _) =>
+        {
+            var helper = new WindowInteropHelper(window);
+            source = HwndSource.FromHwnd(helper.Handle);
+            source?.AddHook(WndProc);
+
+            ParseHotkey(hotkey, out uint modifiers, out uint key);
+            RegisterHotKey(helper.Handle, HotkeyId, modifiers, key);
+        };
+
+        window.Show();
+        window.Hide();
+    }
+
+    public void Unregister()
+    {
+        if (window is not null)
+        {
+            var helper = new WindowInteropHelper(window);
+            if (helper.Handle != IntPtr.Zero)
+            {
+                UnregisterHotKey(helper.Handle, HotkeyId);
+            }
+        }
+
+        source?.RemoveHook(WndProc);
+        source = null;
+        window?.Close();
+        window = null;
+    }
+
+    public void Dispose()
+    {
+        Unregister();
+    }
+
+    private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
+    {
+        if (msg == WmHotkey && wParam.ToInt32() == HotkeyId)
+        {
+            Pressed?.Invoke(this, EventArgs.Empty);
+            handled = true;
+        }
+
+        return IntPtr.Zero;
+    }
+
+    private static void ParseHotkey(string hotkey, out uint modifiers, out uint key)
+    {
+        modifiers = 0;
+        key = (uint)KeyInterop.VirtualKeyFromKey(Key.Space);
+
+        foreach (string part in hotkey.Split('+', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries))
+        {
+            if (part.Equals("Ctrl", StringComparison.OrdinalIgnoreCase) || part.Equals("Control", StringComparison.OrdinalIgnoreCase))
+            {
+                modifiers |= 0x0002;
+            }
+            else if (part.Equals("Alt", StringComparison.OrdinalIgnoreCase))
+            {
+                modifiers |= 0x0001;
+            }
+            else if (part.Equals("Shift", StringComparison.OrdinalIgnoreCase))
+            {
+                modifiers |= 0x0004;
+            }
+            else if (part.Equals("Win", StringComparison.OrdinalIgnoreCase))
+            {
+                modifiers |= 0x0008;
+            }
+            else if (Enum.TryParse(part, true, out Key parsedKey))
+            {
+                key = (uint)KeyInterop.VirtualKeyFromKey(parsedKey);
+            }
+        }
+    }
+
+    [DllImport("user32.dll", SetLastError = true)]
+    private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
+
+    [DllImport("user32.dll", SetLastError = true)]
+    private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
+}