cherry picked from old branch

Terminal.Gui/View/Adornment/Adornment.cs

@@ -83,18 +83,17 @@ public class Adornment : View
     }
 
     /// <inheritdoc/>
-    public override void BoundsToScreen (int col, int row, out int rcol, out int rrow)
+    public override Rectangle BoundsToScreen (Rectangle bounds)
     {
         // Adornments are *Children* of a View, not SubViews. Thus View.BoundsToScreen will not work.
         // To get the screen-relative coordinates of a Adornment, we need to know who
         // the Parent is
         Rectangle parentFrame = Parent?.Frame ?? Frame;
-        rrow = row + parentFrame.Y;
-        rcol = col + parentFrame.X;
+        bounds.Offset (parentFrame.X, parentFrame.Y);
 
         // We now have rcol/rrow in coordinates relative to our View's SuperView. If our View's SuperView has
         // a SuperView, keep going...
-        Parent?.SuperView?.BoundsToScreen (rcol, rrow, out rcol, out rrow);
+        return Parent?.SuperView?.BoundsToScreen (bounds) ?? bounds;
     }
 
     /// <inheritdoc/>

Terminal.Gui/View/Layout/ViewLayout.cs

@@ -498,39 +498,22 @@ public partial class View
     /// </summary>
     public event EventHandler Initialized;
 
-    /// <summary>Converts a <see cref="Bounds"/>-relative region to a screen-relative region.</summary>
-    public Rectangle BoundsToScreen (Rectangle region)
+    /// <summary>Converts a <see cref="Bounds"/>-relative rectangle to a screen-relative rectangle.</summary>
+    public virtual Rectangle BoundsToScreen (Rectangle bounds)
     {
-        BoundsToScreen (region.X, region.Y, out int screenX, out int screenY);
-
-        return region with { X = screenX, Y = screenY };
-    }
-
-    /// <summary>
-    ///     Converts a <see cref="Bounds"/>-relative coordinate to a screen-relative coordinate. The output is optionally
-    ///     clamped to the screen dimensions.
-    /// </summary>
-    /// <param name="x"><see cref="Bounds"/>-relative column.</param>
-    /// <param name="y"><see cref="Bounds"/>-relative row.</param>
-    /// <param name="rx">Absolute column; screen-relative.</param>
-    /// <param name="ry">Absolute row; screen-relative.</param>
-    public virtual void BoundsToScreen (int x, int y, out int rx, out int ry)
-    {
-        // PERF: Use Point.Offset
-        // Already dealing with Point here.
         Point boundsOffset = GetBoundsOffset ();
-        rx = x + Frame.X + boundsOffset.X;
-        ry = y + Frame.Y + boundsOffset.Y;
+        bounds.Offset(Frame.X + boundsOffset.X, Frame.Y + boundsOffset.Y);
 
         View super = SuperView;
 
         while (super is { })
         {
             boundsOffset = super.GetBoundsOffset ();
-            rx += super.Frame.X + boundsOffset.X;
-            ry += super.Frame.Y + boundsOffset.Y;
+            bounds.Offset(super.Frame.X + boundsOffset.X, super.Frame.Y + boundsOffset.Y);
             super = super.SuperView;
         }
+
+        return bounds;
     }
 
 #nullable enable
@@ -626,7 +609,7 @@ public partial class View
         int right = Margin.Thickness.Right + Border.Thickness.Right + Padding.Thickness.Right;
         int bottom = Margin.Thickness.Bottom + Border.Thickness.Bottom + Padding.Thickness.Bottom;
 
-        return new Thickness (left, top, right, bottom);
+        return new (left, top, right, bottom);
     }
 
     /// <summary>
@@ -635,7 +618,7 @@ public partial class View
     /// </summary>
     public Point GetBoundsOffset ()
     {
-        return new Point (
+        return new (
                           Padding?.Thickness.GetInside (Padding.Frame).X ?? 0,
                           Padding?.Thickness.GetInside (Padding.Frame).Y ?? 0
                          );

Terminal.Gui/Views/TileView.cs

@@ -217,7 +217,7 @@ public class TileView : View
             {
                 bool isRoot = _splitterLines.Contains (line);
 
-                Rectangle screen = line.BoundsToScreen (new (new (0, 0), Size.Empty));
+                Rectangle screen = line.BoundsToScreen (Rectangle.Empty);
                 Point origin = ScreenToFrame (screen.X, screen.Y);
                 int length = line.Orientation == Orientation.Horizontal ? line.Frame.Width : line.Frame.Height;
 

UnitTests/View/Adornment/ToScreenTests.cs

@@ -0,0 +1,502 @@
+using Xunit.Abstractions;
+
+namespace Terminal.Gui.ViewTests;
+
+/// <summary>
+/// Test the <see cref="Adornment.FrameToScreen"/> and <see cref="Adornment.BoundsToScreen"/> methods.
+/// DOES NOT TEST View.xxxToScreen methods. Those are in ./View/Layout/ToScreenTests.cs
+/// </summary>
+/// <param name="output"></param>
+public class AdornmentToScreenTests (ITestOutputHelper output)
+{
+    private readonly ITestOutputHelper _output = output;
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NoSuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal(expectedX, marginScreen.X);
+        Assert.Equal (expectedX, borderScreen.X);
+        Assert.Equal (expectedX, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NoSuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var view = new View ();
+        view.Border.Thickness = new (1);
+        view.Frame = frame;
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen ();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_SuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen ();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 1)]
+    [InlineData (1, 2)]
+    [InlineData (-1, 0)]
+    [InlineData (11, 12)]
+    public void FrameToScreen_SuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superView.Border.Thickness = new (1);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen ();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NestedSuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen ();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 2)]
+    [InlineData (1, 3)]
+    [InlineData (-1, 1)]
+    [InlineData (11, 13)]
+    public void FrameToScreen_NestedSuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superSuperView.Border.Thickness = new (1);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+        superView.Border.Thickness = new (1);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.FrameToScreen ();
+        var borderScreen = view.Border.FrameToScreen ();
+        var paddingScreen = view.Padding.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+    public void BoundsToScreen_NoSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+
+    [InlineData (0, 1, 1)]
+    [InlineData (1, 1, 2)]
+    [InlineData (-1, 1, 0)]
+    [InlineData (11, 1, 12)]
+
+    [InlineData (0, -1, -1)]
+    [InlineData (1, -1, 0)]
+    [InlineData (-1, -1, -2)]
+    [InlineData (11, -1, 10)]
+    public void BoundsToScreen_NoSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var view = new View ();
+        view.Border.Thickness = new (1);
+        view.Frame = frame;
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX, borderScreen.X);
+        Assert.Equal (expectedX, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+
+    [InlineData (0, 1, 1)]
+    [InlineData (1, 1, 2)]
+    [InlineData (-1, 1, 0)]
+    [InlineData (11, 1, 12)]
+
+    [InlineData (0, -1, -1)]
+    [InlineData (1, -1, 0)]
+    [InlineData (-1, -1, -2)]
+    [InlineData (11, -1, 10)]
+    public void BoundsToScreen_SuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 1)]
+    [InlineData (1, 0, 2)]
+    [InlineData (-1, 0, 0)]
+    [InlineData (11, 0, 12)]
+
+    [InlineData (0, 1, 2)]
+    [InlineData (1, 1, 3)]
+    [InlineData (-1, 1, 1)]
+    [InlineData (11, 1, 13)]
+
+    [InlineData (0, -1, 0)]
+    [InlineData (1, -1, 1)]
+    [InlineData (-1, -1, -1)]
+    [InlineData (11, -1, 11)]
+    public void BoundsToScreen_SuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superView.Border.Thickness = new (1);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+
+    [InlineData (0, 1, 1)]
+    [InlineData (1, 1, 2)]
+    [InlineData (-1, 1, 0)]
+    [InlineData (11, 1, 12)]
+
+    [InlineData (0, -1, -1)]
+    [InlineData (1, -1, 0)]
+    [InlineData (-1, -1, -2)]
+    [InlineData (11, -1, 10)]
+    public void BoundsToScreen_NestedSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 2)]
+    [InlineData (1, 0, 3)]
+    [InlineData (-1, 0, 1)]
+    [InlineData (11, 0, 13)]
+
+    [InlineData (0, 1, 3)]
+    [InlineData (1, 1, 4)]
+    [InlineData (-1, 1, 2)]
+    [InlineData (11, 1, 14)]
+
+    [InlineData (0, -1, 1)]
+    [InlineData (1, -1, 2)]
+    [InlineData (-1, -1, 0)]
+    [InlineData (11, -1, 12)]
+    public void BoundsToScreen_NestedSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superSuperView.Border.Thickness = new (1);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+        superView.Border.Thickness = new (1);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var marginScreen = view.Margin.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var borderScreen = view.Border.BoundsToScreen (new (boundsX, 0, 0, 0));
+        var paddingScreen = view.Padding.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, marginScreen.X);
+        Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
+        Assert.Equal (expectedX + view.Border.Thickness.Left, paddingScreen.X);
+    }
+
+}

UnitTests/View/Layout/ToScreenTests.cs

@@ -0,0 +1,454 @@
+using Xunit.Abstractions;
+
+namespace Terminal.Gui.ViewTests;
+
+/// <summary>
+/// Test the <see cref="View.FrameToScreen"/> and <see cref="View.BoundsToScreen"/> methods.
+/// DOES NOT TEST Adornment.xxxToScreen methods. Those are in ./Adornment/ToScreenTests.cs
+/// </summary>
+/// <param name="output"></param>
+public class ToScreenTests (ITestOutputHelper output)
+{
+    private readonly ITestOutputHelper _output = output;
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NoSuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        // Act
+        var screen = view.FrameToScreen();
+
+        // Assert
+        Assert.Equal(expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NoSuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var view = new View ();
+        view.BorderStyle = LineStyle.Single;
+        view.Frame = frame;
+
+        // Act
+        var screen = view.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_SuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 1)]
+    [InlineData (1, 2)]
+    [InlineData (-1, 0)]
+    [InlineData (11, 12)]
+    public void FrameToScreen_SuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superView.BorderStyle = LineStyle.Single;
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0)]
+    [InlineData (1, 1)]
+    [InlineData (-1, -1)]
+    [InlineData (11, 11)]
+    public void FrameToScreen_NestedSuperView_WithoutAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 2)]
+    [InlineData (1, 3)]
+    [InlineData (-1, 1)]
+    [InlineData (11, 13)]
+    public void FrameToScreen_NestedSuperView_WithAdornments (int x, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (x, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superSuperView.BorderStyle = LineStyle.Single;
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+        superView.BorderStyle = LineStyle.Single;
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.FrameToScreen ();
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+    public void BoundsToScreen_NoSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 1)]
+    [InlineData (1, 0, 2)]
+    [InlineData (-1, 0, 0)]
+    [InlineData (11, 0, 12)]
+
+    [InlineData (0, 1, 2)]
+    [InlineData (1, 1, 3)]
+    [InlineData (-1, 1, 1)]
+    [InlineData (11, 1, 13)]
+
+    [InlineData (0, -1, 0)]
+    [InlineData (1, -1, 1)]
+    [InlineData (-1, -1, -1)]
+    [InlineData (11, -1, 11)]
+    public void BoundsToScreen_NoSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var view = new View ();
+        view.BorderStyle = LineStyle.Single;
+        view.Frame = frame;
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+
+    [InlineData (0, 1, 1)]
+    [InlineData (1, 1, 2)]
+    [InlineData (-1, 1, 0)]
+    [InlineData (11, 1, 12)]
+
+    [InlineData (0, -1, -1)]
+    [InlineData (1, -1, 0)]
+    [InlineData (-1, -1, -2)]
+    [InlineData (11, -1, 10)]
+    public void BoundsToScreen_SuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 1)]
+    [InlineData (1, 0, 2)]
+    [InlineData (-1, 0, 0)]
+    [InlineData (11, 0, 12)]
+
+    [InlineData (0, 1, 2)]
+    [InlineData (1, 1, 3)]
+    [InlineData (-1, 1, 1)]
+    [InlineData (11, 1, 13)]
+
+    [InlineData (0, -1, 0)]
+    [InlineData (1, -1, 1)]
+    [InlineData (-1, -1, -1)]
+    [InlineData (11, -1, 11)]
+    public void BoundsToScreen_SuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superView.BorderStyle = LineStyle.Single;
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 0)]
+    [InlineData (1, 0, 1)]
+    [InlineData (-1, 0, -1)]
+    [InlineData (11, 0, 11)]
+
+    [InlineData (0, 1, 1)]
+    [InlineData (1, 1, 2)]
+    [InlineData (-1, 1, 0)]
+    [InlineData (11, 1, 12)]
+
+    [InlineData (0, -1, -1)]
+    [InlineData (1, -1, 0)]
+    [InlineData (-1, -1, -2)]
+    [InlineData (11, -1, 10)]
+    public void BoundsToScreen_NestedSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+    [Theory]
+    [InlineData (0, 0, 2)]
+    [InlineData (1, 0, 3)]
+    [InlineData (-1, 0, 1)]
+    [InlineData (11, 0, 13)]
+
+    [InlineData (0, 1, 3)]
+    [InlineData (1, 1, 4)]
+    [InlineData (-1, 1, 2)]
+    [InlineData (11, 1, 14)]
+
+    [InlineData (0, -1, 1)]
+    [InlineData (1, -1, 2)]
+    [InlineData (-1, -1, 0)]
+    [InlineData (11, -1, 12)]
+    public void BoundsToScreen_NestedSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superSuperView.BorderStyle = LineStyle.Single;
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+        superView.BorderStyle = LineStyle.Single;
+
+        var view = new View ();
+        view.Frame = frame;
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.BoundsToScreen (new (boundsX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
+
+}