osu/osu.Game/Beatmaps/Formats/LegacyDecoder.cs
2019-02-28 13:31:40 +09:00

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