mirror of https://github.com/ppy/osu
48 lines
1.9 KiB
C#
48 lines
1.9 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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#nullable enable
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using System.Linq;
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using System.Text;
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namespace osu.Game.Beatmaps
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{
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/// <summary>
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/// Groups utility methods used to handle beatmap metadata.
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/// </summary>
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public static class MetadataUtils
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{
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/// <summary>
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/// Returns <see langword="true"/> if the character <paramref name="c"/> can be used in <see cref="BeatmapMetadata.Artist"/> and <see cref="BeatmapMetadata.Title"/> fields.
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/// Characters not matched by this method can be placed in <see cref="BeatmapMetadata.ArtistUnicode"/> and <see cref="BeatmapMetadata.TitleUnicode"/>.
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/// </summary>
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public static bool IsRomanised(char c) => c <= 0xFF;
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/// <summary>
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/// Returns <see langword="true"/> if the string <paramref name="str"/> can be used in <see cref="BeatmapMetadata.Artist"/> and <see cref="BeatmapMetadata.Title"/> fields.
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/// Strings not matched by this method can be placed in <see cref="BeatmapMetadata.ArtistUnicode"/> and <see cref="BeatmapMetadata.TitleUnicode"/>.
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/// </summary>
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public static bool IsRomanised(string? str) => string.IsNullOrEmpty(str) || str.All(IsRomanised);
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/// <summary>
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/// Returns a copy of <paramref name="str"/> with all characters that do not match <see cref="IsRomanised(char)"/> removed.
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/// </summary>
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public static string StripNonRomanisedCharacters(string? str)
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{
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if (string.IsNullOrEmpty(str))
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return string.Empty;
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var stringBuilder = new StringBuilder(str.Length);
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foreach (var c in str)
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{
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if (IsRomanised(c))
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stringBuilder.Append(c);
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}
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return stringBuilder.ToString().Trim();
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}
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}
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}
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