gui-cs.Terminal.Gui/UnitTests/View/Layout/AbsoluteLayoutTests.cs

using Xunit.Abstractions;

//using GraphViewTests = Terminal.Gui.Views.GraphViewTests;

// Alias Console to MockConsole so we don't accidentally use Console

namespace Terminal.Gui.ViewTests;

public class AbsoluteLayoutTests
{
    private readonly ITestOutputHelper _output;

    public AbsoluteLayoutTests (ITestOutputHelper output) { _output = output; }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_Frame ()
    {
        var frame = new Rect (1, 2, 3, 4);
        var newFrame = new Rect (1, 2, 30, 40);

        var v = new View ();
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        v.Dispose ();

        v = new View (frame);
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);

        v.Frame = newFrame;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (30), v.Width);
        Assert.Equal (Dim.Sized (40), v.Height);
        v.Dispose ();

        v = new View (frame.X, frame.Y, "v");
        v.Frame = newFrame;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (30), v.Width);
        Assert.Equal (Dim.Sized (40), v.Height);
        v.Dispose ();

        newFrame = new Rect (10, 20, 30, 40);
        v = new View (frame);
        v.Frame = newFrame;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (10), v.X);
        Assert.Equal (Pos.At (20), v.Y);
        Assert.Equal (Dim.Sized (30), v.Width);
        Assert.Equal (Dim.Sized (40), v.Height);
        v.Dispose ();

        v = new View (frame.X, frame.Y, "v");
        v.Frame = newFrame;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (10), v.X);
        Assert.Equal (Pos.At (20), v.Y);
        Assert.Equal (Dim.Sized (30), v.Width);
        Assert.Equal (Dim.Sized (40), v.Height);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_Height_or_Width_Absolute ()
    {
        var frame = new Rect (1, 2, 3, 4);
        var newFrame = new Rect (1, 2, 30, 40);

        var v = new View (frame);
        v.Height = newFrame.Height;
        v.Width = newFrame.Width;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal ($"Absolute({newFrame.Height})", v.Height.ToString ());
        Assert.Equal ($"Absolute({newFrame.Width})", v.Width.ToString ());
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_Height_or_Width_MakesComputed ()
    {
        var v = new View (Rect.Empty);
        v.Height = Dim.Fill ();
        v.Width = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_X_or_Y_Absolute ()
    {
        var frame = new Rect (1, 2, 3, 4);
        var newFrame = new Rect (10, 20, 3, 4);

        var v = new View (frame);
        v.X = newFrame.X;
        v.Y = newFrame.Y;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newFrame, v.Frame);
        Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal ($"Absolute({newFrame.X})", v.X.ToString ());
        Assert.Equal ($"Absolute({newFrame.Y})", v.Y.ToString ());
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_X_or_Y_MakesComputed ()
    {
        var v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Change_X_Y_Height_Width_Absolute ()
    {
        var v = new View (Rect.Empty);
        v.X = 1;
        v.Y = 2;
        v.Height = 3;
        v.Width = 4;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);

        v.X = 1;
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);

        v.Y = 2;
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);

        v.Width = 3;
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);

        v.Height = 3;
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);
        v.Dispose ();

        v = new View (Rect.Empty);
        v.X = Pos.Center ();
        v.Y = Pos.Center ();
        v.Width = Dim.Fill ();
        v.Height = Dim.Fill ();
        Assert.True (v.LayoutStyle == LayoutStyle.Computed);

        v.X = 1;
        v.Y = 2;
        v.Height = 3;
        v.Width = 4;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_Constructor ()
    {
        var v = new View ();
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        v.Dispose ();

        var frame = Rect.Empty;
        v = new View (frame);
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (frame, v.Frame);
        Assert.Equal (new Rect (0, 0, frame.Width, frame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (0), v.X);
        Assert.Equal (Pos.At (0), v.Y);
        Assert.Equal (Dim.Sized (0), v.Width);
        Assert.Equal (Dim.Sized (0), v.Height);
        v.Dispose ();

        frame = new Rect (1, 2, 3, 4);
        v = new View (frame);
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (frame, v.Frame);
        Assert.Equal (new Rect (0, 0, frame.Width, frame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);
        v.Dispose ();

        v = new View (frame, "v");
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (frame, v.Frame);
        Assert.Equal (new Rect (0, 0, frame.Width, frame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);
        v.Dispose ();

        v = new View (frame.X, frame.Y, "v");
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);

        // BUGBUG: v2 - I think the default size should be 0,0 not 1,1
        Assert.Equal (new Rect (frame.X, frame.Y, 1, 1), v.Frame);
        Assert.Equal (new Rect (0, 0, 1, 1), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (1), v.Width);
        Assert.Equal (Dim.Sized (1), v.Height);
        v.Dispose ();

        v = new View ();
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (new Rect (0, 0, 0, 0), v.Frame);
        Assert.Equal (new Rect (0, 0, 0, 0), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (0), v.X);
        Assert.Equal (Pos.At (0), v.Y);
        Assert.Equal (Dim.Sized (0), v.Width);
        Assert.Equal (Dim.Sized (0), v.Height);
        v.Dispose ();

        v = new View
        {
            X = frame.X,
            Y = frame.Y,
            Width = frame.Width,
            Height = frame.Height
        };
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (new Rect (frame.X, frame.Y, 3, 4), v.Frame);
        Assert.Equal (new Rect (0, 0, 3, 4), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);
        v.Dispose ();
    }

    [Fact]
    [TestRespondersDisposed]
    public void AbsoluteLayout_LayoutSubviews ()
    {
        var superRect = new Rect (0, 0, 100, 100);
        var super = new View (superRect, "super");
        Assert.True (super.LayoutStyle == LayoutStyle.Absolute);

        var v1 = new View
        {
            X = 0,
            Y = 0,
            Width = 10,
            Height = 10
        };
        Assert.True (v1.LayoutStyle == LayoutStyle.Absolute);

        var v2 = new View
        {
            X = 10,
            Y = 10,
            Width = 10,
            Height = 10
        };
        Assert.True (v2.LayoutStyle == LayoutStyle.Absolute);

        super.Add (v1, v2);
        Assert.True (v1.LayoutStyle == LayoutStyle.Absolute);
        Assert.True (v2.LayoutStyle == LayoutStyle.Absolute);

        super.LayoutSubviews ();
        Assert.Equal (new Rect (0, 0, 10, 10), v1.Frame);
        Assert.Equal (new Rect (10, 10, 10, 10), v2.Frame);
        super.Dispose ();
    }

    [Fact]
    public void AbsoluteLayout_Setting_Bounds_Location_NotEmpty ()
    {
        // TODO: Should we enforce Bounds.X/Y == 0? The code currently ignores value.X/Y which is
        // TODO: correct behavior, but is silent. Perhaps an exception?
        var frame = new Rect (1, 2, 3, 4);
        var newBounds = new Rect (10, 20, 30, 40);
        var view = new View (frame);
        view.Bounds = newBounds;
        Assert.Equal (new Rect (0, 0, 30, 40), view.Bounds);
        Assert.Equal (new Rect (1, 2, 30, 40), view.Frame);
    }

    [Fact]
    public void AbsoluteLayout_Setting_Bounds_Sets_Frame ()
    {
        var frame = new Rect (1, 2, 3, 4);
        var newBounds = new Rect (0, 0, 30, 40);

        var v = new View (frame);
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);

        v.Bounds = newBounds;
        Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
        Assert.Equal (newBounds, v.Bounds);
        Assert.Equal (new Rect (1, 2, newBounds.Width, newBounds.Height), v.Frame);
        Assert.Equal (new Rect (0, 0, newBounds.Width, newBounds.Height), v.Bounds);
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (30), v.Width);
        Assert.Equal (Dim.Sized (40), v.Height);

        newBounds = new Rect (0, 0, 3, 4);
        v.Bounds = newBounds;
        Assert.Equal (newBounds, v.Bounds);
        Assert.Equal (new Rect (1, 2, newBounds.Width, newBounds.Height), v.Frame);
        Assert.Equal (new Rect (0, 0, newBounds.Width, newBounds.Height), v.Bounds);
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);

        v.BorderStyle = LineStyle.Single;

        // Bounds should shrink
        Assert.Equal (new Rect (0, 0, 1, 2), v.Bounds);

        // Frame should not change
        Assert.Equal (new Rect (1, 2, 3, 4), v.Frame);
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (3), v.Width);
        Assert.Equal (Dim.Sized (4), v.Height);

        // Now set bounds bigger as before
        newBounds = new Rect (0, 0, 3, 4);
        v.Bounds = newBounds;
        Assert.Equal (newBounds, v.Bounds);

        // Frame grows because there's now a border
        Assert.Equal (new Rect (1, 2, 5, 6), v.Frame);
        Assert.Equal (new Rect (0, 0, newBounds.Width, newBounds.Height), v.Bounds);
        Assert.Equal (Pos.At (1), v.X);
        Assert.Equal (Pos.At (2), v.Y);
        Assert.Equal (Dim.Sized (5), v.Width);
        Assert.Equal (Dim.Sized (6), v.Height);
    }
}