add rank display element

osu.Game/Screens/Play/HUD/RankDisplay.cs

@@ -0,0 +1,46 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Skinning;
+using osu.Framework.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Extensions;
+
+namespace osu.Game.Screens.Play.HUD
+{
+    public partial class RankDisplay : FontAdjustableSkinComponent
+    {
+        [Resolved]
+        private ScoreProcessor scoreProcessor { get; set; } = null!;
+
+        private readonly OsuSpriteText text;
+
+        public RankDisplay()
+        {
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                text = new OsuSpriteText
+                {
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.CentreLeft,
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            text.Text = scoreProcessor.Rank.Value.GetDescription();
+
+            scoreProcessor.Rank.BindValueChanged(v => text.Text = v.NewValue.GetDescription());
+        }
+
+        protected override void SetFont(FontUsage font) => text.Font = font.With(size: 40);
+    }
+}