Implement NoScoresPlaceholder

osu.Game/Overlays/BeatmapSet/Scores/NoScoresPlaceholder.cs

@@ -0,0 +1,50 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Framework.Bindables;
+using osu.Game.Screens.Select.Leaderboards;
+using osu.Framework.Graphics.Sprites;
+
+namespace osu.Game.Overlays.BeatmapSet.Scores
+{
+    public class NoScoresPlaceholder : Container
+    {
+        public readonly Bindable<BeatmapLeaderboardScope> Scope = new Bindable<BeatmapLeaderboardScope>();
+
+        private readonly SpriteText text;
+
+        public NoScoresPlaceholder()
+        {
+            AutoSizeAxes = Axes.Both;
+            Child = text = new SpriteText
+            {
+                Font = OsuFont.GetFont(),
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            Scope.BindValueChanged(scope => text.Text = getText(scope.NewValue), true);
+        }
+
+        private string getText(BeatmapLeaderboardScope scope)
+        {
+            switch (scope)
+            {
+                default:
+                case BeatmapLeaderboardScope.Global:
+                return @"No scores yet. Maybe should try setting some?";
+
+                case BeatmapLeaderboardScope.Friend:
+                return @"None of your friends has set a score on this map yet!";
+
+                case BeatmapLeaderboardScope.Country:
+                return @"No one from your country has set a score on this map yet!";
+            }
+        }
+    }
+}