private int WriteLayout(RenderTreeBuilder builder, XmlReader reader, int globalSeq)
{
int localSeq = globalSeq;
if (reader.NodeType == XmlNodeType.Element)
{
//Console.WriteLine(globalSeq + " element " + reader.Name);
if (reader.LocalName.StartsWith("wc-child-"))
{
var position = Convert.ToInt32(reader.LocalName.Substring("wc-child-".Length));
var toRender = DesignNodeCollection[position];
builder.OpenComponent <PageDesignerChild>(localSeq++);
builder.AddAttribute(localSeq++, nameof(PageDesignerChild.DesignNode), Microsoft.AspNetCore.Blazor.Components.RuntimeHelpers.TypeCheck <BlazorComponents.Shared.PreviewNode>(toRender));
builder.AddAttribute(localSeq++, nameof(PageDesignerChild.Dispatcher), Microsoft.AspNetCore.Blazor.Components.RuntimeHelpers.TypeCheck <PagePreview>(Dispatcher));
var justElements = DesignNodeCollection.Where(x => x.Type != NodeType.Html).ToList();
var childPosition = ChildPosition.Middle;
if (justElements.First() == toRender)
{
childPosition = ChildPosition.First;
}
if (justElements.Last() == toRender)
{
childPosition = ChildPosition.Last;
}
builder.AddAttribute(localSeq++, nameof(PageDesignerChild.Position), Microsoft.AspNetCore.Blazor.Components.RuntimeHelpers.TypeCheck <ChildPosition>(childPosition));
builder.CloseComponent();
return(localSeq);
}
else
{
//Console.WriteLine(globalSeq + " BLAZOR OPEN EL");
builder.OpenElement(localSeq++, reader.Name.ToString());
if (reader.HasAttributes)
{
//Console.WriteLine(reader.Name + " Attribute");
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
//Console.WriteLine(localSeq + " attr " + reader.Name + ", " + reader.Value);
//Console.WriteLine(localSeq + " BLAZOR ADD ATTR");
builder.AddAttribute(localSeq++, reader.Name, reader.Value);
}
reader.MoveToElement();
}
if (reader.IsEmptyElement)
{
//Console.WriteLine(localSeq + " BLAZOR CLOSE EL *EMPTY*");
builder.CloseElement();
}
return(localSeq);
}
}
if (reader.NodeType == XmlNodeType.Text)
{
// Console.WriteLine(globalSeq + " text " + reader.Value);
//Console.WriteLine(globalSeq + " BLAZOR ADD MARKUP");
builder.AddMarkupContent(localSeq++, reader.Value?.ToString());
return(localSeq);
}
if (reader.NodeType == XmlNodeType.EndElement)
{
//Console.WriteLine(globalSeq + " end-element " + reader.Name);
//Console.WriteLine(globalSeq + " BLAZOR CLOSE EL");
builder.CloseElement();
return(localSeq);
}
return(localSeq);
}
protected override void BuildRenderTree(RenderTreeBuilder builder)
{
base.BuildRenderTree(builder);
if (!DesignNodeCollection.Any())
{
return;
}
var nonHtmlCount = DesignNodeCollection.Any(x => x.Type != NodeType.Html);
var htmlCount = DesignNodeCollection.Count(x => x.Type == NodeType.Html);
if (!nonHtmlCount && htmlCount == 1)
{
builder.AddMarkupContent(0, DesignNodeCollection[0].Html);
return;
}
XNode layoutXml;
int seq = 0;
var key = Json.Serialize(DesignNodeCollection);
if (!_cache.ContainsKey(key))
{
var layoutHtml = CreateLayoutHtml();
try
{
layoutXml = ParseLayoutXml(layoutHtml);
_cache.Add(key, layoutXml);
}
catch (Exception exception)
{
builder.AddContent(seq++, exception.Message);
return;
}
}
else
{
layoutXml = _cache[key];
}
//var sw = new Stopwatch();
//sw.Start();
//Console.WriteLine("[Page Preview] Rendering Sublayout");
var reader = layoutXml.CreateReader();
reader.Read();
bool hasMore = true;
while (hasMore)
{
seq = WriteLayout(builder, reader, seq);
if (reader.EOF)
{
hasMore = false;
}
else
{
reader.Read();
hasMore = reader.NodeType != XmlNodeType.None;
}
}
//sw.Stop();
//Console.WriteLine("[Page Preview] Finished Sublayout. "+ seq + " elements, delivered in " + sw.Elapsed.TotalSeconds);
}