Terminal.Gui/UnitTests/View/MouseTests.cs

using Terminal.Gui.ViewsTests;
using Xunit.Abstractions;

namespace Terminal.Gui.ViewTests;

public class MouseTests (ITestOutputHelper output)
{
    [Theory]
    [InlineData (false, false, false)]
    [InlineData (true, false, true)]
    [InlineData (true, true, true)]
    public void MouseClick_SetsFocus_If_CanFocus (bool canFocus, bool setFocus, bool expectedHasFocus)
    {
        var superView = new View { CanFocus = true, Height = 1, Width = 15 };
        var focusedView = new View { CanFocus = true, Width = 1, Height = 1 };
        var testView = new View { CanFocus = canFocus, X = 4, Width = 4, Height = 1 };
        superView.Add (focusedView, testView);

        focusedView.SetFocus ();

        Assert.True (superView.HasFocus);
        Assert.True (focusedView.HasFocus);
        Assert.False (testView.HasFocus);

        if (setFocus)
        {
            testView.SetFocus ();
        }

        testView.OnMouseEvent (new () { X = 0, Y = 0, Flags = MouseFlags.Button1Clicked });
        Assert.True (superView.HasFocus);
        Assert.Equal (expectedHasFocus, testView.HasFocus);
    }

    // TODO: Add more tests that ensure the above test works with positive adornments

    // Test drag to move
    [Theory]
    [InlineData (0, 0, 0, 0, false)]
    [InlineData (0, 0, 0, 4, false)]
    [InlineData (1, 0, 0, 4, true)]
    [InlineData (0, 1, 0, 4, true)]
    [InlineData (0, 0, 1, 4, false)]

    [InlineData (1, 1, 0, 3, false)]
    [InlineData (1, 1, 0, 4, true)]
    [InlineData (1, 1, 0, 5, true)]
    [InlineData (1, 1, 0, 6, false)]


    [InlineData (1, 1, 0, 11, false)]
    [InlineData (1, 1, 0, 12, true)]
    [InlineData (1, 1, 0, 13, true)]
    [InlineData (1, 1, 0, 14, false)]
    [AutoInitShutdown]
    public void ButtonPressed_In_Margin_Or_Border_Starts_Drag (int marginThickness, int borderThickness, int paddingThickness, int xy, bool expectedMoved)
    {
        var testView = new View
        {
            CanFocus = true,
            X = 4,
            Y = 4,
            Width = 10,
            Height = 10,
            Arrangement = ViewArrangement.Movable
        };
        testView.Margin.Thickness = new (marginThickness);
        testView.Border.Thickness = new (borderThickness);
        testView.Padding.Thickness = new (paddingThickness);

        var top = new Toplevel ();
        top.Add (testView);
        Application.Begin (top);

        Assert.Equal (new Point (4, 4), testView.Frame.Location);
        Application.OnMouseEvent (new (new () { X = xy, Y = xy, Flags = MouseFlags.Button1Pressed }));

        Assert.False (Application.MouseGrabView is { } && (Application.MouseGrabView != testView.Margin && Application.MouseGrabView != testView.Border));

        Application.OnMouseEvent (new (new () { X = xy + 1, Y = xy + 1, Flags = MouseFlags.Button1Pressed | MouseFlags.ReportMousePosition }));

        Assert.Equal (expectedMoved, new Point (5, 5) == testView.Frame.Location);
    }

    [Theory]
    [InlineData (MouseFlags.WheeledUp | MouseFlags.ButtonCtrl, MouseFlags.WheeledLeft)]
    [InlineData (MouseFlags.WheeledDown | MouseFlags.ButtonCtrl, MouseFlags.WheeledRight)]
    public void WheeledLeft_WheeledRight (MouseFlags mouseFlags, MouseFlags expectedMouseFlagsFromEvent)
    {
        MouseFlags mouseFlagsFromEvent = MouseFlags.None;
        var view = new View ();
        view.MouseEvent += (s, e) => mouseFlagsFromEvent = e.MouseEvent.Flags;

        view.OnMouseEvent (new MouseEvent () { Flags = mouseFlags });
        Assert.Equal (mouseFlagsFromEvent, expectedMouseFlagsFromEvent);
    }
}