Implemented a more complex setting conversion logic + tests

osu.Game.Tests/Mods/ModSettingsTest.cs

@@ -2,6 +2,9 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using NUnit.Framework;
+using osu.Framework.Bindables;
+using osu.Framework.Localisation;
+using osu.Game.Configuration;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Mods;
 
@@ -32,5 +35,44 @@ namespace osu.Game.Tests.Mods
             Assert.That(((OsuModDoubleTime)original.Mods[0]).SpeedChange.Value, Is.EqualTo(2.0));
             Assert.That(((OsuModDoubleTime)copy.Mods[0]).SpeedChange.Value, Is.EqualTo(1.5));
         }
+
+        [Test]
+        public void TestCopySharedSettingsOfDifferentType()
+        {
+            const double setting_change = 2.5;
+
+            var osuMod = new TestNonMatchinSettingTypeOsuMod();
+            var maniaMod = new TestNonMatchinSettingTypeManiaMod();
+
+            osuMod.TestSetting.Value = setting_change;
+            maniaMod.CopySharedSettings(osuMod);
+            osuMod.CopySharedSettings(maniaMod);
+
+            Assert.That(maniaMod.TestSetting.IsDefault, "Value has been changed");
+            Assert.That(osuMod.TestSetting.Value == setting_change);
+        }
+
+        private class TestNonMatchinSettingTypeOsuMod : TestNonMatchinSettingTypeMod
+        {
+            public override string Acronym => "NMO";
+            public override BindableNumber<double> TestSetting { get; } = new BindableDouble(3.5);
+        }
+
+        private class TestNonMatchinSettingTypeManiaMod : TestNonMatchinSettingTypeMod
+        {
+            public override string Acronym => "NMM";
+            public override Bindable<bool> TestSetting { get; } = new BindableBool(true);
+        }
+
+        private abstract class TestNonMatchinSettingTypeMod : Mod
+        {
+            public override string Name => "Non-matching setting type mod";
+            public override LocalisableString Description => "Description";
+            public override double ScoreMultiplier => 1;
+            public override ModType Type => ModType.Conversion;
+
+            [SettingSource("Test setting")]
+            public abstract IBindable TestSetting { get; }
+        }
     }
 }

osu.Game.Tests/Visual/UserInterface/TestSceneModSelectOverlay.cs

@@ -18,6 +18,7 @@ using osu.Game.Overlays.Mods;
 using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Catch.Mods;
+using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
@@ -387,7 +388,8 @@ namespace osu.Game.Tests.Visual.UserInterface
 
             AddStep("change mod settings", () =>
             {
-                var osuMod = (getMod() as OsuModDifficultyAdjust)!;
+                var osuMod = getMod<OsuModDifficultyAdjust>();
+
                 osuMod.ExtendedLimits.Value = true;
                 osuMod.CircleSize.Value = setting_change;
                 osuMod.DrainRate.Value = setting_change;
@@ -400,23 +402,60 @@ namespace osu.Game.Tests.Visual.UserInterface
 
             AddAssert("shared settings didn't change", () =>
             {
-                var taikoMod = getMod() as TaikoModDifficultyAdjust;
-                return
-                    taikoMod?.ExtendedLimits.Value == true &&
+                var taikoMod = getMod<TaikoModDifficultyAdjust>();
+
+                return taikoMod.ExtendedLimits.Value &&
                        taikoMod.DrainRate.Value == setting_change &&
                        taikoMod.OverallDifficulty.Value == setting_change;
             });
 
-            AddAssert("non-shared settings at default", () =>
+            AddAssert("non-shared settings unchanged", () =>
             {
-                var taikoMod = getMod() as TaikoModDifficultyAdjust;
-                if (taikoMod == null)
-                    return false;
+                var taikoMod = getMod<TaikoModDifficultyAdjust>();
 
-                return taikoMod.ScrollSpeed.Value == taikoMod.ScrollSpeed.Default;
+                return taikoMod.ScrollSpeed.IsDefault;
+            });
+        }
+
+        [Test]
+        public void TestKeepSharedSettingsRatio()
+        {
+            const float setting_change = 1.8f;
+
+            createScreen();
+            changeRuleset(0);
+
+            AddStep("select flashlight mod", () => SelectedMods.Value = new[] { Ruleset.Value.CreateInstance().CreateMod<ModFlashlight>()! });
+
+            changeRuleset(0);
+            AddAssert("ensure mod still selected", () => SelectedMods.Value.SingleOrDefault() is OsuModFlashlight);
+
+            AddStep("change mod settings", () =>
+            {
+                var osuMod = getMod<OsuModFlashlight>();
+
+                // range <0.5 - 2>
+                osuMod.SizeMultiplier.Value = setting_change;
             });
 
-            ModDifficultyAdjust getMod() => (SelectedMods.Value.Single() as ModDifficultyAdjust)!;
+            changeRuleset(3);
+            AddAssert("mania variant selected", () => SelectedMods.Value.SingleOrDefault() is ManiaModFlashlight);
+
+            AddAssert("shared settings changed to closest ratio", () =>
+            {
+                var maniaMod = getMod<ManiaModFlashlight>();
+
+                // range <0.5 - 3>
+                // converted value based on ratio = (setting_change - 0.5) / (2 - 0.5) * (3 - 0.5) + 0.5 = 2.66
+                return maniaMod.SizeMultiplier.Value == 2.7f; // taking precision into account
+            });
+
+            AddAssert("other settings unchanged", () =>
+            {
+                var maniaMod = getMod<ManiaModFlashlight>();
+
+                return maniaMod.ComboBasedSize.IsDefault;
+            });
         }
 
         [Test]
@@ -514,6 +553,8 @@ namespace osu.Game.Tests.Visual.UserInterface
             waitForColumnLoad();
 
             AddAssert("unimplemented mod panel is filtered", () => getPanelForMod(typeof(TestUnimplementedMod)).Filtered.Value);
+
+            AddStep("disable panel filtering", () => getPanelForMod(typeof(TestUnimplementedMod)).Filtered.Value = false);
         }
 
         [Test]
@@ -629,6 +670,8 @@ namespace osu.Game.Tests.Visual.UserInterface
             AddAssert($"customisation toggle is {(active ? "" : "not ")}active", () => modSelectOverlay.CustomisationButton.AsNonNull().Active.Value == active);
         }
 
+        private T getMod<T>() where T : Mod => (T)SelectedMods.Value.Single();
+
         private ModPanel getPanelForMod(Type modType)
             => modSelectOverlay.ChildrenOfType<ModPanel>().Single(panel => panel.Mod.GetType() == modType);
 

osu.Game/Rulesets/Mods/Mod.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
+using AutoMapper.Internal;
 using Newtonsoft.Json;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.TypeExtensions;
@@ -173,13 +174,46 @@ namespace osu.Game.Rulesets.Mods
 
             foreach (var (_, property) in this.GetSettingsSourceProperties())
             {
-                var targetBindable = (IBindable)property.GetValue(this)!;
+                object targetSetting = property.GetValue(this)!;
 
                 if (!oldSettings.TryGetValue(property.Name.ToSnakeCase(), out object? sourceSetting))
                     continue;
 
-                CopyAdjustedSetting(targetBindable, sourceSetting);
+                if (((IBindable)sourceSetting).IsDefault)
+                    // keep at default value if the source is default
+                    continue;
+
+                Type? targetType = getGenericBaseType(targetSetting, typeof(BindableNumber<>));
+                Type? sourceType = getGenericBaseType(sourceSetting, typeof(BindableNumber<>));
+
+                if (targetType == null || sourceType == null)
+                {
+                    if (getGenericBaseType(targetSetting, typeof(Bindable<>))!.GenericTypeArguments.Single() ==
+                        getGenericBaseType(sourceSetting, typeof(Bindable<>))!.GenericTypeArguments.Single())
+                        // change settings only if the type is the same
+                        CopyAdjustedSetting((IBindable)targetSetting, sourceSetting);
+
+                    continue;
                 }
+
+                double targetMin = getValue(targetSetting, nameof(IBindableNumber<int>.MinValue));
+                double targetMax = getValue(targetSetting, nameof(IBindableNumber<int>.MaxValue));
+                double sourceMin = getValue(sourceSetting, nameof(IBindableNumber<int>.MinValue));
+                double sourceMax = getValue(sourceSetting, nameof(IBindableNumber<int>.MaxValue));
+                double sourceValue = getValue(sourceSetting, nameof(IBindableNumber<int>.Value));
+
+                // convert value to same ratio
+                double targetValue = (sourceValue - sourceMin) / (sourceMax - sourceMin) * (targetMax - targetMin) + targetMin;
+
+                targetType.GetProperty(nameof(IBindableNumber<int>.Value))!.SetValue(targetSetting,
+                    Convert.ChangeType(targetValue, targetType.GenericTypeArguments.Single()));
+            }
+
+            double getValue(object target, string name) =>
+                Convert.ToDouble(target.GetType().GetProperty(name)!.GetValue(target)!);
+
+            Type? getGenericBaseType(object target, Type genericType) =>
+                target.GetType().GetTypeInheritance().FirstOrDefault(t => t.IsGenericType && t.GetGenericTypeDefinition() == genericType);
         }
 
         /// <summary>