modified PopupLayout

CursorLang/Services/MainWindowPlacement.cs

@@ -103,17 +103,18 @@ public sealed class MainWindowPlacement
     private static PopupWindowNative.Point? CenterOnActiveMonitor(PopupWindowNative.Rect bounds)
     {
         (PopupWindowNative.Rect work, _) = PopupWindowNative.GetActiveMonitorWorkArea();
-        if (IsEmpty(work))
-        {
-            return null;
-        }
+        return IsEmpty(work) ? null : Center(bounds, work);
+    }
 
-        return new PopupWindowNative.Point
+    /// <summary>
+    /// The point at which a window with the given bounds ends up in the centre of the work area.
+    /// </summary>
+    internal static PopupWindowNative.Point Center(
+        PopupWindowNative.Rect bounds, PopupWindowNative.Rect work) => new()
         {
             X = work.Left + (((work.Right - work.Left) - Width(bounds)) / 2),
             Y = work.Top + (((work.Bottom - work.Top) - Height(bounds)) / 2),
         };
-    }
 
     /// <summary>
     /// Pulls the window into the work area of the nearest monitor.
@@ -145,6 +146,22 @@ public sealed class MainWindowPlacement
             return null;
         }
 
+        return Clamp(position, bounds, work);
+    }
+
+    /// <summary>
+    /// Pulls the point so that a window with the given bounds fits into the work area
+    /// entirely. A window taller than the work area gets its top edge: the title bar
+    /// is needed more than the lower part of the window.
+    /// </summary>
+    internal static PopupWindowNative.Point Clamp(
+        PopupWindowNative.Point position,
+        PopupWindowNative.Rect bounds,
+        PopupWindowNative.Rect work)
+    {
+        int width = Width(bounds);
+        int height = Height(bounds);
+
         return new PopupWindowNative.Point
         {
             X = Math.Clamp(position.X, work.Left, Math.Max(work.Left, work.Right - width)),
@@ -156,6 +173,6 @@ public sealed class MainWindowPlacement
 
     private static int Height(PopupWindowNative.Rect rect) => rect.Bottom - rect.Top;
 
-    private static bool IsEmpty(PopupWindowNative.Rect rect) =>
+    internal static bool IsEmpty(PopupWindowNative.Rect rect) =>
         rect.Right <= rect.Left || rect.Bottom <= rect.Top;
 }