70 lines
2.3 KiB
C#
70 lines
2.3 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace mustache
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{
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/// <summary>
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/// Defines a tag that can iterate over a collection of items and render
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/// the content using each item as the context.
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/// </summary>
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internal sealed class EachTagDefinition : TagDefinition
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{
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private const string collectionParameter = "collection";
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/// <summary>
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/// Initializes a new instance of an EachTagDefinition.
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/// </summary>
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public EachTagDefinition()
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: base("each", true)
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{
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}
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/// <summary>
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/// Gets the parameters that can be passed to the tag.
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/// </summary>
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/// <returns>The parameters.</returns>
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protected override TagParameter[] GetParameters()
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{
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return new TagParameter[] { new TagParameter(collectionParameter) { IsRequired = true } };
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}
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/// <summary>
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/// Gets whether the tag has content.
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/// </summary>
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public override bool HasBody
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{
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get { return true; }
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}
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/// <summary>
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/// Gets the tags that come into scope within the context of the tag.
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/// </summary>
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/// <returns>The tag definitions.</returns>
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protected override TagDefinition[] GetChildTags()
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{
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return new TagDefinition[0];
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}
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/// <summary>
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/// Gets the scopes for each of the items found in the argument.
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/// </summary>
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/// <param name="scope">The current scope.</param>
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/// <param name="arguments">The arguments passed to the tag.</param>
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/// <returns>The scopes for each of the items found in the argument.</returns>
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public override IEnumerable<KeyScope> GetChildScopes(KeyScope scope, Dictionary<string, object> arguments)
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{
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object value = arguments[collectionParameter];
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IEnumerable enumerable = value as IEnumerable;
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if (enumerable == null)
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{
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yield break;
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}
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foreach (object item in enumerable)
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{
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yield return scope.CreateChildScope(item);
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}
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}
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}
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}
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