lightweight variant (#1)

Reviewed-on: #1 Co-authored-by: Aleksandr Neychev <alexnejchev73@gmail.com>
2026-08-12 13:37:30 +00:00
parent a0d3098fe4
commit 55ac8e6556
147 changed files with 4055 additions and 2349 deletions
@@ -0,0 +1,41 @@
+using System.Runtime.InteropServices;
+
+namespace CursorLang.Core.Interop;
+
+/// <summary>
+/// Input details of the active application: which window holds keyboard focus
+/// and where the caret is.
+/// </summary>
+internal static class ForegroundInputNative
+{
+    [StructLayout(LayoutKind.Sequential)]
+    internal struct GuiThreadInfo
+    {
+        public int cbSize;
+        public uint flags;
+        public IntPtr hwndActive;
+        public IntPtr hwndFocus;
+        public IntPtr hwndCapture;
+        public IntPtr hwndMenuOwner;
+        public IntPtr hwndMoveSize;
+        public IntPtr hwndCaret;
+        public PopupWindowNative.Rect rcCaret;
+    }
+
+    [DllImport("user32.dll")]
+    private static extern bool GetGUIThreadInfo(uint idThread, ref GuiThreadInfo lpgui);
+
+    /// <summary>
+    /// The input state of the foreground thread.
+    /// </summary>
+    /// <remarks>
+    /// The zero thread identifier is not accidental: in modern applications the
+    /// top-level window and the input window live in different threads, and the
+    /// question has to be about the foreground as a whole.
+    /// </remarks>
+    internal static bool TryGetInfo(out GuiThreadInfo info)
+    {
+        info = new GuiThreadInfo { cbSize = Marshal.SizeOf<GuiThreadInfo>() };
+        return GetGUIThreadInfo(0, ref info);
+    }
+}