54 lines
1.4 KiB
C#
54 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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namespace MfGames.Nitride.Slugs;
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/// <summary>
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/// Extends the slug provider to strip out accented characters for
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/// a normalized form.
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/// </summary>
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public class UnicodeNormalizingSlugConverter : SimpleSlugConverter
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{
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/// <inheritdoc />
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public UnicodeNormalizingSlugConverter()
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{
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}
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/// <inheritdoc />
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public UnicodeNormalizingSlugConverter(IDictionary<string, string> replacements)
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: base(replacements)
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{
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}
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/// <inheritdoc />
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public override string ToSlug(string input)
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{
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// If we have null or whitespace, we have a problem.
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if (string.IsNullOrWhiteSpace(input))
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{
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throw new ArgumentException("Cannot have a blank or null input", nameof(input));
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}
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// Normalize the Unicode objects.
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// Strip out the accents. This is a cheesy way of doing so.
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char[] chars = input.Normalize(NormalizationForm.FormD)
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.Where(this.IsNonSpacingMark)
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.ToArray();
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string normalized = new string(chars).Normalize(NormalizationForm.FormC);
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// Return the base implementation.
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return base.ToSlug(normalized);
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}
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private bool IsNonSpacingMark(char c)
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{
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UnicodeCategory category = CharUnicodeInfo.GetUnicodeCategory(c);
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return category != UnicodeCategory.NonSpacingMark;
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}
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}
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