LinkReference.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Content.Markdown.Rendering;
 
namespace Waher.Content.Markdown.Model.SpanElements
{
    public class LinkReference : MarkdownElementChildren
    {
        private readonly string label;
 
        public LinkReference(MarkdownDocument Document, IEnumerable<MarkdownElement> ChildElements, string Label)
            : base(Document, ChildElements)
        {
            this.label = Label;
        }
 
        public string Label => this.label;
 
        public override Task Render(IRenderer Output) => Output.Render(this);
 
        public override string ToString()
        {
            return this.label;
        }
 
        public override bool InlineSpanElement => true;
 
        public override MarkdownElementChildren Create(IEnumerable<MarkdownElement> Children, MarkdownDocument Document)
        {
            return new LinkReference(Document, Children, this.label);
        }
 
        public override bool SameMetaData(MarkdownElement E)
        {
            return E is LinkReference x &&
                x.label == this.label &&
                base.SameMetaData(E);
        }
 
        public override bool Equals(object obj)
        {
            return obj is LinkReference x &&
                this.label == x.label &&
                base.Equals(obj);
        }
 
        public override int GetHashCode()
        {
            int h1 = base.GetHashCode();
            int h2 = this.label?.GetHashCode() ?? 0;
 
            h1 = ((h1 << 5) + h1) ^ h2;
 
            return h1;
        }
 
        public override void IncrementStatistics(MarkdownStatistics Statistics)
        {
            Multimedia Multimedia = this.Document.GetReference(this.label);
 
            if (!(Multimedia is null))
            {
                if (Statistics.IntUrlHyperlinks is null)
                    Statistics.IntUrlHyperlinks = new List<string>();
 
                string Url = Multimedia.Items[0].Url;
 
                if (!Statistics.IntUrlHyperlinks.Contains(Url))
                    Statistics.IntUrlHyperlinks.Add(Url);
            }
 
            Statistics.NrHyperLinks++;
            Statistics.NrUrlHyperLinks++;
        }
 
    }
}