From df602623495d679f6753e6a892141dbf9b3b3899 Mon Sep 17 00:00:00 2001
From: TheXamlGuy <dan_clark@outlook.com>
Date: Thu, 4 Jan 2024 22:27:54 +0000
Subject: [PATCH] keyboard introp

---
 .../ContextualCommandView.xaml                |  2 +-
 .../ContextualCommandView.xaml.cs             |  7 ++
 .../Hyperbar.Desktop.Contextual.csproj        |  1 +
 Hyperbar.Desktop.Win32/KeyIntrop.cs           | 84 +++++++++++++++++++
 Hyperbar.Desktop.Win32/NativeMethods.txt      |  4 +-
 Hyperbar.Desktop/Views/CommandView.xaml.cs    |  6 ++
 6 files changed, 102 insertions(+), 2 deletions(-)
 create mode 100644 Hyperbar.Desktop.Win32/KeyIntrop.cs

diff --git a/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml b/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml
index cd71865..1c78ee6 100644
--- a/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml
+++ b/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml
@@ -10,6 +10,6 @@
     mc:Ignorable="d">
 
     <Grid>
-        <Button Content="This is a test" />
+        <Button Content="This is a test" Click="Button_Click"/>
     </Grid>
 </Page>
diff --git a/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml.cs b/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml.cs
index 7a86f81..7f3fc5e 100644
--- a/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml.cs
+++ b/Hyperbar.Desktop.Contextual/ContextualCommandView.xaml.cs
@@ -1,8 +1,15 @@
+using Hyperbar.Desktop.Win32;
 using Microsoft.UI.Xaml.Controls;
+using Windows.System;
 
 namespace Hyperbar.Desktop.Contextual;
 
 public sealed partial class ContextualCommandView : Page
 {
     public ContextualCommandView() => InitializeComponent();
+
+    private void Button_Click(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
+    {
+        KeyIntrop.Type((VirtualKey)186, VirtualKey.LeftWindows);
+    }
 }
diff --git a/Hyperbar.Desktop.Contextual/Hyperbar.Desktop.Contextual.csproj b/Hyperbar.Desktop.Contextual/Hyperbar.Desktop.Contextual.csproj
index 613c60d..0059503 100644
--- a/Hyperbar.Desktop.Contextual/Hyperbar.Desktop.Contextual.csproj
+++ b/Hyperbar.Desktop.Contextual/Hyperbar.Desktop.Contextual.csproj
@@ -18,6 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\Hyperbar.Desktop.Win32\Hyperbar.Desktop.Win32.csproj" />
     <ProjectReference Include="..\Hyperbar\Hyperbar.csproj" />
   </ItemGroup>
 
diff --git a/Hyperbar.Desktop.Win32/KeyIntrop.cs b/Hyperbar.Desktop.Win32/KeyIntrop.cs
new file mode 100644
index 0000000..0a28250
--- /dev/null
+++ b/Hyperbar.Desktop.Win32/KeyIntrop.cs
@@ -0,0 +1,84 @@
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using Windows.System;
+using Windows.Win32;
+using Windows.Win32.UI.KeyboardAndMouseInput;
+
+namespace Hyperbar.Desktop.Win32;
+
+public class KeyIntrop
+{
+    private static readonly VirtualKey[] ExtendedKeys = [
+        VirtualKey.Menu,
+        VirtualKey.Menu,
+        VirtualKey.NumberKeyLock,
+        VirtualKey.Insert,
+        VirtualKey.Delete,
+        VirtualKey.Home,
+        VirtualKey.End,
+        VirtualKey.Up,
+        VirtualKey.Down,
+        VirtualKey.Left,
+        VirtualKey.Right,
+        VirtualKey.Application,
+        VirtualKey.RightWindows,
+        VirtualKey.LeftWindows ];
+
+    public static void Press(VirtualKey key) => SendKey(key, true);
+
+    public static void Release(VirtualKey key) => SendKey(key, false);
+
+
+    public static unsafe void Type(VirtualKey key, 
+        params VirtualKey[] modifierKeys)
+    {
+        foreach (VirtualKey modiferKey in modifierKeys)
+        {
+            Press(modiferKey);
+        }
+
+        Press(key);
+        Release(key);
+
+        foreach (VirtualKey modifierKey in modifierKeys.Reverse())
+        {
+            Release(modifierKey);
+        }
+    }
+
+    private static unsafe void SendKey(VirtualKey key, 
+        bool pressed)
+    {
+        INPUT input = new()
+        {
+            type = INPUT_TYPE.INPUT_KEYBOARD
+        };
+
+        input.Anonymous.ki.wVk = (ushort)key;
+        input.Anonymous.ki.wScan = (ushort)PInvoke.MapVirtualKey(input.Anonymous.ki.wVk, 0);
+
+        KEYBD_EVENT_FLAGS flags = 0;
+
+        if (input.Anonymous.ki.wScan > 0)
+        {
+            flags |= KEYBD_EVENT_FLAGS.KEYEVENTF_SCANCODE;
+        }
+
+        if (!pressed)
+        {
+            flags |= KEYBD_EVENT_FLAGS.KEYEVENTF_KEYUP;
+        }
+
+        if (ExtendedKeys.Contains(key))
+        {
+            flags |= KEYBD_EVENT_FLAGS.KEYEVENTF_EXTENDEDKEY;
+        }
+
+        input.Anonymous.ki.dwFlags = flags;
+        input.Anonymous.ki.time = 0;
+        input.Anonymous.ki.dwExtraInfo = new nuint();
+
+        PInvoke.SendInput(new Span<INPUT>(ref input), Marshal.SizeOf(input));
+    }
+}
diff --git a/Hyperbar.Desktop.Win32/NativeMethods.txt b/Hyperbar.Desktop.Win32/NativeMethods.txt
index c2b8722..95b59b0 100644
--- a/Hyperbar.Desktop.Win32/NativeMethods.txt
+++ b/Hyperbar.Desktop.Win32/NativeMethods.txt
@@ -54,4 +54,6 @@ DwmExtendFrameIntoClientArea
 CreateRectRgn
 CreateSolidBrush
 FillRect
-GetDC
\ No newline at end of file
+GetDC
+SendInput
+MapVirtualKey
\ No newline at end of file
diff --git a/Hyperbar.Desktop/Views/CommandView.xaml.cs b/Hyperbar.Desktop/Views/CommandView.xaml.cs
index 36bc9e2..f80310c 100644
--- a/Hyperbar.Desktop/Views/CommandView.xaml.cs
+++ b/Hyperbar.Desktop/Views/CommandView.xaml.cs
@@ -1,8 +1,14 @@
 using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Input;
 
 namespace Hyperbar.Desktop;
 
 public sealed partial class CommandView : Page
 {
     public CommandView() => InitializeComponent();
+
+    protected override void OnKeyDown(KeyRoutedEventArgs e)
+    {
+        base.OnKeyDown(e);
+    }
 }