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Avoid saving state changes if nothing has changed (via binary comparison)

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Dean Herbert
2020-09-28 15:30:18 +09:00
parent 600d37cc04
commit 3cf430f494
2 changed files with 71 additions and 14 deletions
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28
osu.Game/Screens/Edit/EditorChangeHandler.cs
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@ -4,9 +4,11 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using osu.Framework.Bindables;
using osu.Framework.Extensions;
using osu.Framework.Logging;
using osu.Game.Beatmaps.Formats;
using osu.Game.Rulesets.Objects;
@ -89,23 +91,27 @@ namespace osu.Game.Screens.Edit
if (isRestoring)
return;
if (currentState < savedStates.Count - 1)
savedStates.RemoveRange(currentState + 1, savedStates.Count - currentState - 1);
if (savedStates.Count > MAX_SAVED_STATES)
savedStates.RemoveAt(0);
using (var stream = new MemoryStream())
{
using (var sw = new StreamWriter(stream, Encoding.UTF8, 1024, true))
new LegacyBeatmapEncoder(editorBeatmap, editorBeatmap.BeatmapSkin).Encode(sw);
savedStates.Add(stream.ToArray());
var newState = stream.ToArray();
// if the previous state is binary equal we don't need to push a new one, unless this is the initial state.
if (savedStates.Count > 0 && newState.SequenceEqual(savedStates.Last())) return;
if (currentState < savedStates.Count - 1)
savedStates.RemoveRange(currentState + 1, savedStates.Count - currentState - 1);
if (savedStates.Count > MAX_SAVED_STATES)
savedStates.RemoveAt(0);
savedStates.Add(newState);
currentState = savedStates.Count - 1;
updateBindables();
}
currentState = savedStates.Count - 1;
updateBindables();
}
/// <summary>