mirror of
https://github.com/ppy/osu
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212 lines
5.9 KiB
C#
212 lines
5.9 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.IO;
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using osu.Framework.Logging;
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using osu.Game.Audio;
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using osu.Game.Beatmaps.ControlPoints;
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using osuTK.Graphics;
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namespace osu.Game.Beatmaps.Formats
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{
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public abstract class LegacyDecoder<T> : Decoder<T>
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where T : new()
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{
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protected readonly int FormatVersion;
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protected LegacyDecoder(int version)
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{
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FormatVersion = version;
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}
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protected override void ParseStreamInto(StreamReader stream, T output)
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{
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Section section = Section.None;
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string line;
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while ((line = stream.ReadLine()) != null)
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{
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if (ShouldSkipLine(line))
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continue;
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if (line.StartsWith(@"[", StringComparison.Ordinal) && line.EndsWith(@"]", StringComparison.Ordinal))
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{
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if (!Enum.TryParse(line.Substring(1, line.Length - 2), out section))
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{
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Logger.Log($"Unknown section \"{line}\" in {output}");
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section = Section.None;
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}
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continue;
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}
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try
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{
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ParseLine(output, section, line);
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}
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catch (Exception e)
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{
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Logger.Error(e, $"Failed to process line \"{line}\" into {output}");
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}
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}
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}
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protected virtual bool ShouldSkipLine(string line) => string.IsNullOrWhiteSpace(line) || line.StartsWith("//", StringComparison.Ordinal);
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protected virtual void ParseLine(T output, Section section, string line)
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{
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line = StripComments(line);
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switch (section)
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{
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case Section.Colours:
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handleColours(output, line);
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return;
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}
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}
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protected string StripComments(string line)
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{
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var index = line.AsSpan().IndexOf("//".AsSpan());
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if (index > 0)
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return line.Substring(0, index);
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return line;
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}
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private bool hasComboColours;
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private void handleColours(T output, string line)
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{
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var pair = SplitKeyVal(line);
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bool isCombo = pair.Key.StartsWith(@"Combo");
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string[] split = pair.Value.Split(',');
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if (split.Length != 3 && split.Length != 4)
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throw new InvalidOperationException($@"Color specified in incorrect format (should be R,G,B or R,G,B,A): {pair.Value}");
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Color4 colour;
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try
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{
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colour = new Color4(byte.Parse(split[0]), byte.Parse(split[1]), byte.Parse(split[2]), split.Length == 4 ? byte.Parse(split[3]) : (byte)255);
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}
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catch (Exception e)
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{
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throw new InvalidOperationException(@"Color must be specified with 8-bit integer components");
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}
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if (isCombo)
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{
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if (!(output is IHasComboColours tHasComboColours)) return;
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if (!hasComboColours)
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{
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// remove default colours.
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tHasComboColours.ComboColours.Clear();
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hasComboColours = true;
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}
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tHasComboColours.ComboColours.Add(colour);
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}
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else
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{
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if (!(output is IHasCustomColours tHasCustomColours)) return;
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tHasCustomColours.CustomColours[pair.Key] = colour;
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}
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}
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protected KeyValuePair<string, string> SplitKeyVal(string line, char separator = ':')
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{
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var split = line.Trim().Split(new[] { separator }, 2);
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return new KeyValuePair<string, string>
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(
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split[0].Trim(),
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split.Length > 1 ? split[1].Trim() : string.Empty
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);
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}
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protected enum Section
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{
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None,
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General,
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Editor,
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Metadata,
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Difficulty,
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Events,
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TimingPoints,
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Colours,
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HitObjects,
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Variables,
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Fonts
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}
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internal enum LegacySampleBank
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{
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None = 0,
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Normal = 1,
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Soft = 2,
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Drum = 3
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}
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internal enum EventType
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{
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Background = 0,
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Video = 1,
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Break = 2,
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Colour = 3,
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Sprite = 4,
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Sample = 5,
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Animation = 6
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}
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internal enum LegacyOrigins
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{
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TopLeft,
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Centre,
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CentreLeft,
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TopRight,
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BottomCentre,
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TopCentre,
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Custom,
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CentreRight,
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BottomLeft,
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BottomRight
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}
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internal enum StoryLayer
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{
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Background = 0,
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Fail = 1,
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Pass = 2,
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Foreground = 3
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}
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internal class LegacySampleControlPoint : SampleControlPoint
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{
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public int CustomSampleBank;
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public override SampleInfo ApplyTo(SampleInfo sampleInfo)
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{
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var baseInfo = base.ApplyTo(sampleInfo);
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if (string.IsNullOrEmpty(baseInfo.Suffix) && CustomSampleBank > 1)
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baseInfo.Suffix = CustomSampleBank.ToString();
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return baseInfo;
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}
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public override bool EquivalentTo(ControlPoint other)
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=> base.EquivalentTo(other)
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&& other is LegacySampleControlPoint legacy
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&& CustomSampleBank == legacy.CustomSampleBank;
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}
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}
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}
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