NeuroFeatureCodeBlock.cs

using NeuroAccessMaui.Resources.Languages;
using NeuroAccessMaui.Services;
using NeuroFeatures;
using System.Text;
using System.Xml;
using Waher.Content.Markdown;
using Waher.Content.Markdown.Model;
using Waher.Runtime.Inventory;
 
namespace NeuroAccessMaui.UI.Rendering.CodeContent
{
    public class NeuroFeatureCodeBlock : ICodeContent, ICodeContentMauiXamlRenderer
    {
        private MarkdownDocument? document;
 
        public NeuroFeatureCodeBlock()
        {
        }
 
        public MarkdownDocument? Document => this.document;
 
        public bool EvaluatesScript => false;
 
        public async Task<bool> RenderMauiXaml(MauiXamlRenderer Renderer, string[] Rows, string Language, int Indent, MarkdownDocument Document)
        {
            XmlWriter Output = Renderer.XmlOutput;
            Token Token;
 
            try
            {
                StringBuilder Sb = new();
 
                foreach (string Row in Rows)
                    Sb.AppendLine(Row);
 
                XmlDocument Doc = new()
                {
                    PreserveWhitespace = true
                };
                Doc.LoadXml(Sb.ToString());
 
                Token? ParsedToken = await NeuroFeatures.Token.TryParse(Doc.DocumentElement);
                if (ParsedToken is null)
                    throw new Exception(ServiceRef.Localizer[nameof(AppResources.InvalidNeuroFeatureToken)]);
 
                Token = ParsedToken;
            }
            catch (Exception ex)
            {
                Output.WriteStartElement("Label");
                Output.WriteAttributeString("Text", ex.Message);
                Output.WriteAttributeString("FontFamily", "SpaceGroteskRegular");
                Output.WriteAttributeString("TextColor", "Red");
                Output.WriteAttributeString("LineBreakMode", "WordWrap");
                Output.WriteEndElement();
 
                return false;
            }
 
            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", "{DynamicResource ContentPrimaryWL}");
            Output.WriteAttributeString("Data", "{x:Static ui:Geometries.TokenPath}");
            Output.WriteEndElement();
 
            Output.WriteStartElement("Label");
            Output.WriteAttributeString("LineBreakMode", "WordWrap");
            Output.WriteAttributeString("FontSize", "Medium");
            Output.WriteAttributeString("HorizontalOptions", "Center");
            Output.WriteAttributeString("Text", Token.FriendlyName);
            Output.WriteEndElement();
 
            Output.WriteStartElement("StackLayout.GestureRecognizers");
 
            Output.WriteStartElement("TapGestureRecognizer");
            Output.WriteAttributeString("Command", "{Binding Path=NeuroFeatureUriClicked}");
            Output.WriteAttributeString("CommandParameter", Constants.UriSchemes.NeuroFeature + ":" + Token.ToXml());
            Output.WriteEndElement();
 
            Output.WriteEndElement();
            Output.WriteEndElement();
 
            return true;
        }
 
        public void Register(MarkdownDocument Document)
        {
            this.document = Document;
        }
 
        public Grade Supports(string Language)
        {
            return string.Equals(Language, Constants.UriSchemes.NeuroFeature, StringComparison.OrdinalIgnoreCase) ? Grade.Excellent : Grade.NotAtAll;
        }
    }
}