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Merge pull request #22032 from frenzibyte/fix-potential-difficulty-failure-alt

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Fix advanced statistics display potentially performing invalid difficulty calculation
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Dean Herbert 2023-01-23 15:39:47 +09:00 committed by GitHub
commit e3932c077b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 9 deletions
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5
osu.Game/OsuGameBase.cs
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@ -160,9 +160,12 @@ namespace osu.Game
protected Bindable<WorkingBeatmap> Beatmap { get; private set; } // cached via load() method
/// <summary>
/// The current ruleset selection for the local user.
/// </summary>
[Cached]
[Cached(typeof(IBindable<RulesetInfo>))]
protected readonly Bindable<RulesetInfo> Ruleset = new Bindable<RulesetInfo>();
protected internal readonly Bindable<RulesetInfo> Ruleset = new Bindable<RulesetInfo>();
/// <summary>
/// The current mod selection for the local user.

31
osu.Game/Screens/Select/Details/AdvancedStats.cs
View File

@ -30,14 +30,16 @@ namespace osu.Game.Screens.Select.Details
{
public partial class AdvancedStats : Container
{
[Resolved]
private BeatmapDifficultyCache difficultyCache { get; set; }
[Resolved]
private IBindable<IReadOnlyList<Mod>> mods { get; set; }
[Resolved]
private IBindable<RulesetInfo> ruleset { get; set; }
private OsuGameBase game { get; set; }
[Resolved]
private BeatmapDifficultyCache difficultyCache { get; set; }
private IBindable<RulesetInfo> gameRuleset;
protected readonly StatisticRow FirstValue, HpDrain, Accuracy, ApproachRate;
private readonly StatisticRow starDifficulty;
@ -84,7 +86,13 @@ namespace osu.Game.Screens.Select.Details
{
base.LoadComplete();
ruleset.BindValueChanged(_ => updateStatistics());
// the cached ruleset bindable might be a decoupled bindable provided by SongSelect,
// which we can't rely on in combination with the game-wide selected mods list,
// since mods could be updated to the new ruleset instances while the decoupled bindable is held behind,
// therefore resulting in performing difficulty calculation with invalid states.
gameRuleset = game.Ruleset.GetBoundCopy();
gameRuleset.BindValueChanged(_ => updateStatistics());
mods.BindValueChanged(modsChanged, true);
}
@ -142,7 +150,14 @@ namespace osu.Game.Screens.Select.Details
private CancellationTokenSource starDifficultyCancellationSource;
private void updateStarDifficulty()
/// <summary>
/// Updates the displayed star difficulty statistics with the values provided by the currently-selected beatmap, ruleset, and selected mods.
/// </summary>
/// <remarks>
/// This is scheduled to avoid scenarios wherein a ruleset changes first before selected mods do,
/// potentially resulting in failure during difficulty calculation due to incomplete bindable state updates.
/// </remarks>
private void updateStarDifficulty() => Scheduler.AddOnce(() =>
{
starDifficultyCancellationSource?.Cancel();
@ -151,8 +166,8 @@ namespace osu.Game.Screens.Select.Details
starDifficultyCancellationSource = new CancellationTokenSource();
var normalStarDifficultyTask = difficultyCache.GetDifficultyAsync(BeatmapInfo, ruleset.Value, null, starDifficultyCancellationSource.Token);
var moddedStarDifficultyTask = difficultyCache.GetDifficultyAsync(BeatmapInfo, ruleset.Value, mods.Value, starDifficultyCancellationSource.Token);
var normalStarDifficultyTask = difficultyCache.GetDifficultyAsync(BeatmapInfo, gameRuleset.Value, null, starDifficultyCancellationSource.Token);
var moddedStarDifficultyTask = difficultyCache.GetDifficultyAsync(BeatmapInfo, gameRuleset.Value, mods.Value, starDifficultyCancellationSource.Token);
Task.WhenAll(normalStarDifficultyTask, moddedStarDifficultyTask).ContinueWith(_ => Schedule(() =>
{
@ -164,7 +179,7 @@ namespace osu.Game.Screens.Select.Details
starDifficulty.Value = ((float)normalDifficulty.Value.Stars, (float)moddedDifficulty.Value.Stars);
}), starDifficultyCancellationSource.Token, TaskContinuationOptions.OnlyOnRanToCompletion, TaskScheduler.Current);
}
});
protected override void Dispose(bool isDisposing)
{