91 lines
3.3 KiB
C#
91 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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namespace Mustache
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{
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/// <summary>
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/// Builds text by combining the output of other generators.
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/// </summary>
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internal sealed class CompoundGenerator : IGenerator
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{
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private readonly TagDefinition _definition;
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private readonly ArgumentCollection _arguments;
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private readonly List<IGenerator> _primaryGenerators = new List<IGenerator>();
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private IGenerator _subGenerator;
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/// <summary>
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/// Initializes a new instance of a CompoundGenerator.
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/// </summary>
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/// <param name="definition">The tag that the text is being generated for.</param>
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/// <param name="arguments">The arguments that were passed to the tag.</param>
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public CompoundGenerator(TagDefinition definition, ArgumentCollection arguments)
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{
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_definition = definition;
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_arguments = arguments;
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}
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/// <summary>
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/// Adds the given generator.
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/// </summary>
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/// <param name="generator">The generator to add.</param>
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public void AddGenerator(IGenerator generator)
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{
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addGenerator(generator, false);
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}
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/// <summary>
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/// Adds the given generator, determining whether the generator should
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/// be part of the primary generators or added as an secondary generator.
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/// </summary>
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/// <param name="definition">The tag that the generator is generating text for.</param>
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/// <param name="generator">The generator to add.</param>
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public void AddGenerator(TagDefinition definition, IGenerator generator)
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{
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bool isSubGenerator = _definition.ShouldCreateSecondaryGroup(definition);
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addGenerator(generator, isSubGenerator);
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}
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private void addGenerator(IGenerator generator, bool isSubGenerator)
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{
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if (isSubGenerator)
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{
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_subGenerator = generator;
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}
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else
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{
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_primaryGenerators.Add(generator);
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}
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}
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void IGenerator.GetText(TextWriter writer, Scope keyScope, Scope contextScope, Action<Substitution> postProcessor)
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{
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Dictionary<string, object> arguments = _arguments.GetArguments(keyScope, contextScope);
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IEnumerable<NestedContext> contexts = _definition.GetChildContext(writer, keyScope, arguments, contextScope);
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List<IGenerator> generators;
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if (_definition.ShouldGeneratePrimaryGroup(arguments))
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{
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generators = _primaryGenerators;
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}
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else
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{
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generators = new List<IGenerator>();
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if (_subGenerator != null)
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{
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generators.Add(_subGenerator);
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}
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}
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foreach (NestedContext context in contexts)
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{
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foreach (IGenerator generator in generators)
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{
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generator.GetText(context.Writer ?? writer, context.KeyScope ?? keyScope, context.ContextScope, postProcessor);
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}
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if (context.WriterNeedsConsidated)
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{
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writer.Write(_definition.ConsolidateWriter(context.Writer ?? writer, arguments));
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}
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}
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}
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}
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} |