Add ability to pad stage vertically

osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs

@@ -60,6 +60,10 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
 
                 switch (maniaLookup.Lookup)
                 {
+                    case LegacyManiaSkinConfigurationLookups.StagePaddingBottom:
+                    case LegacyManiaSkinConfigurationLookups.StagePaddingTop:
+                        return SkinUtils.As<TValue>(new Bindable<float>(30));
+
                     case LegacyManiaSkinConfigurationLookups.ColumnWidth:
                         return SkinUtils.As<TValue>(new Bindable<float>(
                             stage.IsSpecialColumn(column) ? 80 : 60

osu.Game.Rulesets.Mania/UI/ColumnFlow.cs

@@ -36,6 +36,8 @@ namespace osu.Game.Rulesets.Mania.UI
 
             AutoSizeAxes = Axes.X;
 
+            Masking = true;
+
             InternalChild = columns = new FillFlowContainer<Container>
             {
                 RelativeSizeAxes = Axes.Y,

osu.Game.Rulesets.Mania/UI/Stage.cs

@@ -13,6 +13,7 @@ using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.Skinning;
 using osu.Game.Rulesets.Mania.UI.Components;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
@@ -130,6 +131,37 @@ namespace osu.Game.Rulesets.Mania.UI
             }
         }
 
+        private ISkinSource currentSkin;
+
+        [BackgroundDependencyLoader]
+        private void load(ISkinSource skin)
+        {
+            currentSkin = skin;
+
+            skin.SourceChanged += onSkinChanged;
+            onSkinChanged();
+        }
+
+        private void onSkinChanged()
+        {
+            float paddingTop = currentSkin.GetConfig<ManiaSkinConfigurationLookup, float>(new ManiaSkinConfigurationLookup(LegacyManiaSkinConfigurationLookups.StagePaddingTop))?.Value ?? 0;
+            float paddingBottom = currentSkin.GetConfig<ManiaSkinConfigurationLookup, float>(new ManiaSkinConfigurationLookup(LegacyManiaSkinConfigurationLookups.StagePaddingBottom))?.Value ?? 0;
+
+            Padding = new MarginPadding
+            {
+                Top = paddingTop,
+                Bottom = paddingBottom,
+            };
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (currentSkin != null)
+                currentSkin.SourceChanged -= onSkinChanged;
+        }
+
         protected override void LoadComplete()
         {
             base.LoadComplete();

osu.Game/Skinning/LegacyManiaSkinConfigurationLookup.cs

@@ -42,6 +42,8 @@ namespace osu.Game.Skinning
         HitPosition,
         ScorePosition,
         LightPosition,
+        StagePaddingTop,
+        StagePaddingBottom,
         HitTargetImage,
         ShowJudgementLine,
         KeyImage,