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osu-lazer/osu.Game/Screens/Edit/BeatmapEditorChangeHandler.cs

41 lines
1.5 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System.IO;
using System.Text;
using osu.Game.Beatmaps.Formats;
using osu.Game.Rulesets.Objects;
namespace osu.Game.Screens.Edit
{
public partial class BeatmapEditorChangeHandler : EditorChangeHandler
{
private readonly LegacyEditorBeatmapPatcher patcher;
private readonly EditorBeatmap editorBeatmap;
/// <summary>
/// Creates a new <see cref="EditorChangeHandler"/>.
/// </summary>
/// <param name="editorBeatmap">The <see cref="EditorBeatmap"/> to track the <see cref="HitObject"/>s of.</param>
public BeatmapEditorChangeHandler(EditorBeatmap editorBeatmap)
{
this.editorBeatmap = editorBeatmap;
editorBeatmap.TransactionBegan += BeginChange;
editorBeatmap.TransactionEnded += EndChange;
editorBeatmap.SaveStateTriggered += SaveState;
patcher = new LegacyEditorBeatmapPatcher(editorBeatmap);
}
protected override void WriteCurrentStateToStream(MemoryStream stream)
{
using (var sw = new StreamWriter(stream, Encoding.UTF8, 1024, true))
new LegacyBeatmapEncoder(editorBeatmap, editorBeatmap.BeatmapSkin).Encode(sw);
}
protected override void ApplyStateChange(byte[] previousState, byte[] newState) =>
patcher.Patch(previousState, newState);
}
}