38 lines
969 B
C#
38 lines
969 B
C#
using Microsoft.AspNetCore.Razor.TagHelpers;
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namespace zero.TagHelpers;
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[HtmlTargetElement(Attributes = PREFIX + "*")]
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public class ClassTagHelper : TagHelper
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{
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private const string PREFIX = "app-class:";
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[HtmlAttributeName("class")]
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public string Classes { get; set; }
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private IDictionary<string, bool> _classValues;
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[HtmlAttributeName("", DictionaryAttributePrefix = PREFIX)]
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public IDictionary<string, bool> ClassValues
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{
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get => _classValues ??= new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
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set => _classValues = value;
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}
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public override void Process(TagHelperContext context, TagHelperOutput output)
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{
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var items = _classValues.Where(e => e.Value).Select(e => e.Key).ToList();
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if (!string.IsNullOrEmpty(Classes))
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{
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items.Insert(0, Classes);
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}
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if (items.Any())
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{
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var classes = string.Join(" ", items.ToArray());
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output.Attributes.Add("class", classes);
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}
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}
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} |