diff --git a/osu.Game/Overlays/Mods/ModSelectScreen.cs b/osu.Game/Overlays/Mods/ModSelectScreen.cs index 693c85fafc..8a83071109 100644 --- a/osu.Game/Overlays/Mods/ModSelectScreen.cs +++ b/osu.Game/Overlays/Mods/ModSelectScreen.cs @@ -168,7 +168,7 @@ namespace osu.Game.Overlays.Mods foreach (var column in columnFlow) { - column.SelectedMods.BindValueChanged(_ => updateBindableFromSelection()); + column.SelectedMods.BindValueChanged(updateBindableFromSelection); } customisationVisible.BindValueChanged(_ => updateCustomisationVisualState(), true); @@ -237,33 +237,36 @@ namespace osu.Game.Overlays.Mods TopLevelContent.MoveToY(-modAreaHeight, transition_duration, Easing.InOutCubic); } - private bool selectionBindableSyncInProgress; - private void updateSelectionFromBindable() { - if (selectionBindableSyncInProgress) - return; - - selectionBindableSyncInProgress = true; - + // note that selectionBindableSyncInProgress is purposefully not checked here. + // this is because in the case of mod selection in solo gameplay, a user selection of a mod can actually lead to deselection of other incompatible mods. + // to synchronise state correctly, updateBindableFromSelection() computes the final mods (including incompatibility rules) and updates SelectedMods, + // and this method then runs unconditionally again to make sure the new visual selection accurately reflects the final set of selected mods. + // selectionBindableSyncInProgress ensures that mutual infinite recursion does not happen after that unconditional call. foreach (var column in columnFlow) column.SelectedMods.Value = SelectedMods.Value.Where(mod => mod.Type == column.ModType).ToArray(); - - selectionBindableSyncInProgress = false; } - private void updateBindableFromSelection() + private bool selectionBindableSyncInProgress; + + private void updateBindableFromSelection(ValueChangedEvent> modSelectionChange) { if (selectionBindableSyncInProgress) return; selectionBindableSyncInProgress = true; - SelectedMods.Value = columnFlow.SelectMany(column => column.SelectedMods.Value).ToArray(); + SelectedMods.Value = ComputeNewModsFromSelection( + modSelectionChange.NewValue.Except(modSelectionChange.OldValue), + modSelectionChange.OldValue.Except(modSelectionChange.NewValue)); selectionBindableSyncInProgress = false; } + protected virtual IReadOnlyList ComputeNewModsFromSelection(IEnumerable addedMods, IEnumerable removedMods) + => columnFlow.SelectMany(column => column.SelectedMods.Value).ToArray(); + protected override void PopIn() { const double fade_in_duration = 400; diff --git a/osu.Game/Overlays/Mods/UserModSelectScreen.cs b/osu.Game/Overlays/Mods/UserModSelectScreen.cs index 81943da514..ed0a07521b 100644 --- a/osu.Game/Overlays/Mods/UserModSelectScreen.cs +++ b/osu.Game/Overlays/Mods/UserModSelectScreen.cs @@ -1,8 +1,11 @@ // Copyright (c) ppy Pty Ltd . Licensed under the MIT Licence. // See the LICENCE file in the repository root for full licence text. +using System.Collections.Generic; +using System.Linq; using JetBrains.Annotations; using osu.Game.Rulesets.Mods; +using osu.Game.Utils; using osuTK.Input; namespace osu.Game.Overlays.Mods @@ -11,6 +14,24 @@ namespace osu.Game.Overlays.Mods { protected override ModColumn CreateModColumn(ModType modType, Key[] toggleKeys = null) => new UserModColumn(modType, false, toggleKeys); + protected override IReadOnlyList ComputeNewModsFromSelection(IEnumerable addedMods, IEnumerable removedMods) + { + IEnumerable modsAfterRemoval = SelectedMods.Value.Except(removedMods).ToList(); + + // the preference is that all new mods should override potential incompatible old mods. + // in general that's a bit difficult to compute if more than one mod is added at a time, + // so be conservative and just remove all mods that aren't compatible with any one added mod. + foreach (var addedMod in addedMods) + { + if (!ModUtils.CheckCompatibleSet(modsAfterRemoval.Append(addedMod), out var invalidMods)) + modsAfterRemoval = modsAfterRemoval.Except(invalidMods); + + modsAfterRemoval = modsAfterRemoval.Append(addedMod).ToList(); + } + + return modsAfterRemoval.ToList(); + } + private class UserModColumn : ModColumn { public UserModColumn(ModType modType, bool allowBulkSelection, [CanBeNull] Key[] toggleKeys = null)