MetaReference.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Content.Markdown.Rendering;
using Waher.Script;
 
namespace Waher.Content.Markdown.Model.SpanElements
{
    public class MetaReference : MarkdownElement
    {
        private readonly string key;
 
        public MetaReference(MarkdownDocument Document, string Key)
            : base(Document)
        {
            this.key = Key;
        }
 
        public string Key => this.key;
 
        public override Task Render(IRenderer Output) => Output.Render(this);
 
        public bool TryGetMetaData(out KeyValuePair<string, bool>[] Values)
        {
            if (this.Document?.TryGetMetaData(this.key, out Values) ?? false)
                return true;
 
            Variables Variables = this.Document.Settings.Variables;
            if (!(Variables is null) && Variables.TryGetVariable(this.key, out Variable Variable))
            {
                Values = new KeyValuePair<string, bool>[] { new KeyValuePair<string, bool>(Variable.ValueObject?.ToString() ?? string.Empty, false) };
                return true;
            }
 
            Values = null;
            return false;
        }
 
        public override string ToString()
        {
            return this.key;
        }
 
        public override bool InlineSpanElement => true;
 
        public override bool Equals(object obj)
        {
            return obj is MetaReference x &&
                this.key == x.key &&
                base.Equals(obj);
        }
 
        public override int GetHashCode()
        {
            int h1 = base.GetHashCode();
            int h2 = this.key?.GetHashCode() ?? 0;
 
            h1 = ((h1 << 5) + h1) ^ h2;
 
            return h1;
        }
 
        public override void IncrementStatistics(MarkdownStatistics Statistics)
        {
            Statistics.NrMetaReference++;
        }
 
    }
}