AM_ExpandArea.cs

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public class AM_ExpandArea : AM_BaseTileSelect
{
    public Area area;
 
    public bool shrink;
 
    public override bool IsBuildMode => true;
 
    public override string textHintTitle => area.Name;
 
    public override string idSound => null;
 
    public override AreaHighlightMode AreaHihlight => AreaHighlightMode.Edit;
 
    public override void OnUpdateCursor()
    {
        SetCursorOnMap(CursorSystem.Build);
    }
 
    public void Activate(Area a, bool _shrink = false)
    {
        area = a;
        shrink = _shrink;
        Activate();
    }
 
    public override HitResult HitTest(Point point, Point start)
    {
        if (shrink)
        {
            if (area.points.Count <= 1)
            {
                return HitResult.Invalid;
            }
            if (point.area == area)
            {
                return HitResult.Valid;
            }
            if (point.area != null)
            {
                return HitResult.Invalid;
            }
            return base.HitTest(point, start);
        }
        HitResult hitResult = EClass._map.rooms.GetHitResult(point, start);
        if (hitResult != 0)
        {
            return hitResult;
        }
        return base.HitTest(point, start);
    }
 
    public override void OnSelectStart(Point point)
    {
    }
 
    public override void OnProcessTiles(Point point, int dir)
    {
        if (shrink)
        {
            area.RemovePoint(point);
            SE.Trash();
        }
        else
        {
            area.AddPoint(point.Copy());
            EClass.Sound.Play("build_area");
        }
    }
 
    public override void OnDeactivate()
    {
        area = null;
        if ((bool)BuildMenu.Instance)
        {
            BuildMenu.Instance.Unselect();
        }
    }
 
    public override void OnCancel()
    {
        ActionMode.EditArea.Activate();
    }
}