XmppUriScheme.cs

using System.Xml;
using Waher.Content.Markdown;
using Waher.Content.Markdown.Model;
using Waher.Content.Markdown.Rendering;
using Waher.Runtime.Inventory;
 
namespace NeuroAccessMaui.UI.Rendering.Multimedia
{
    public class XmppUriScheme : MultimediaContent, IMultimediaMauiXamlRenderer
    {
        public XmppUriScheme()
        {
        }
 
        public override Grade Supports(MultimediaItem Item)
        {
            if (Item.Url.StartsWith("xmpp:", StringComparison.OrdinalIgnoreCase))
                return Grade.Excellent;
            else
                return Grade.NotAtAll;
        }
 
        public override bool EmbedInlineLink(string Url)
        {
            return true;
        }
 
        public async Task RenderMauiXaml(MauiXamlRenderer Renderer, MultimediaItem[] Items, IEnumerable<MarkdownElement> ChildNodes, bool AloneInParagraph, MarkdownDocument Document)
        {
            XmlWriter Output = Renderer.XmlOutput;
 
            foreach (MultimediaItem Item in Items)
            {
                Output.WriteStartElement("VerticalStackLayout");
                Output.WriteAttributeString("HorizontalOptions", "Center");
 
                Output.WriteStartElement("Path");
                Output.WriteAttributeString("VerticalOptions", "Center");
                Output.WriteAttributeString("HorizontalOptions", "Center");
                Output.WriteAttributeString("HeightRequest", "16");
                Output.WriteAttributeString("WidthRequest", "16");
                Output.WriteAttributeString("Aspect", "Uniform");
                Output.WriteAttributeString("Fill", "{AppThemeBinding Light={StaticResource PrimaryForegroundLight}, Dark={StaticResource PrimaryForegroundDark}}");
                Output.WriteAttributeString("Data", "{x:Static ui:Geometries.PersonPath}");
                Output.WriteEndElement();
 
                Output.WriteStartElement("VerticalStackLayout");
                Output.WriteAttributeString("HorizontalOptions", "Center");
 
                Output.WriteStartElement("Label");
                Output.WriteAttributeString("LineBreakMode", "WordWrap");
                Output.WriteAttributeString("TextType", "Html");
                Output.WriteAttributeString("FontSize", "Medium");
 
                using HtmlRenderer Html = new(new HtmlSettings()
                {
                    XmlEntitiesOnly = true
                });
 
                foreach (MarkdownElement E in ChildNodes)
                    await E.Render(Html);
 
                Output.WriteValue(Html.ToString());
                Output.WriteEndElement();
 
                Output.WriteEndElement();
 
                Output.WriteStartElement("VerticalStackLayout.GestureRecognizers");
 
                Output.WriteStartElement("TapGestureRecognizer");
                Output.WriteAttributeString("Command", "{Binding Path=XmppUriClicked}");
                Output.WriteAttributeString("CommandParameter", Item.Url);
                Output.WriteEndElement();
 
                Output.WriteEndElement();
                Output.WriteEndElement();
                break;
            }
        }
    }
}