Placement - is it possible to use placement rule with shape "injected" in a ShapeTableProvider?

[PiemP]

I have searched around about this topic but I can't find some useful information.

I have created a couple of ContentDisplayDriver to render some titles in a custom DisplayType (not Detail or Edit or DetailAdmin). In this way I can manage this titles by placement rules in my placement.json.

I have recently find ShapeTableProvider and I would like to test it in this situation because seems a more efficent way to do a simple task like display some titles in different position, but placement rules in my placement.json file never work in this way. Is it possible to use placement rules with a shape injected in a ShapeTableProvider?

This is my ShapeTableProvider:

    public class PdfSectionShapes : ShapeTableProvider
    {
        private const string mainShape = "ContentTypeName_CustomDysplayType";

        public override ValueTask DiscoverAsync(ShapeTableBuilder builder)
        {

            builder.Describe(mainShape)
                .OnProcessing(async context =>
                {
                    dynamic content = context.Shape;
                    var shapeFactory = context.ServiceProvider.GetRequiredService<IShapeFactory>();

                    var one = await shapeFactory.CreateAsync("TitleOne_CustomDysplayType");
                    one.Metadata.Name = "TitleOne";
                    one.Metadata.Differentiator = "TitleOne";
                    one.Metadata.DisplayType = "CustomDysplayType";
                    await content.Content.AddAsync(one, string.Empty);
                    var two = await shapeFactory.CreateAsync("TitleTwo_CustomDysplayType");
                    two.Metadata.Name = "TitleTwo";
                    two.Metadata.Differentiator = "ToileTwo";
                    two.Metadata.DisplayType = "CustomDysplayType";
                    await content.Content.AddAsync(two, string.Empty);
                });

            return ValueTask.CompletedTask;
        }
    }

I prefer to use placement rules because it gives me the possibilities to have more freedom to move all the shape in my views.

Thank you.

[Piedone]

While I haven't done this, I think yes, in principle this should work, since Placement is for any shape. However, it might be that when your OnProcessing code runs, it's already too late to place that shape how you'd like to.

What's the placement rule you want to apply from the file?

[PiemP]

The placement rule:

"TitleOne_CustomDysplayType":[
    {
      "place": "Content:5",
      "displayType": "CustomDysplayType",
      "contentType": [
        "CustomContentType"
      ]
    }
  ],

With a ContentDisplayDriver this rule works:

public class TitleOneContentDriver : ContentDisplayDriver
    {
        private readonly IContentDefinitionManager _contentDefinitionManager;

        public TitleOneContentDriver(IContentDefinitionManager contentDefinitionManager)
        {
            _contentDefinitionManager = contentDefinitionManager;
        }


        public override IDisplayResult Display(ContentItem contentItem, IUpdateModel updater)
        {

            return Initialize<ContentItemViewModel>("TitleOne_CustomDysplayType", m => m.ContentItem = contentItem)
                .Location("CustomDysplayType", "Content");
        }
    }

I have tested this placement rule without success:

"TitleOne":[
    {
      "place": "Content:5",
      "displayType": "CustomDysplayType",
      "contentType": [
        "CustomContentType"
      ]
    }
  ],

I have changed the ShapeTableProvider code to add shape on OnCreated function but the result doesn't change.
I'm on OrchardCore 1.8.3 ...I don't know if this information could be useful.

[Piedone]

I think the issue is that with await content.Content.AddAsync(two, string.Empty); you already "placed" the shape; now it's in a specific location already. So perhaps this won't work in the end. Do note though, that in the second parameter of AddAsync you can specify the shape's position within its parent shape, much like in Placement.