Adding in "datetime" and "timespan" support

src/OrchardCore/OrchardCore.DisplayManagement/OrchardCoreBuilderExtensions.cs

@@ -90,12 +90,14 @@ public static OrchardCoreBuilder AddTheming(this OrchardCoreBuilder builder)
                     services.AddTagHelpers<ClearAlternatesTagHelper>();
                     services.AddTagHelpers<ClearClassesTagHelper>();
                     services.AddTagHelpers<ClearWrappersTagHelper>();
+                    services.AddTagHelpers<DateTimeTagHelper>();
                     services.AddTagHelpers<InputIsDisabledTagHelper>();
                     services.AddTagHelpers<RemoveAlternateTagHelper>();
                     services.AddTagHelpers<RemoveClassTagHelper>();
                     services.AddTagHelpers<RemoveWrapperTagHelper>();
                     services.AddTagHelpers<ShapeMetadataTagHelper>();
                     services.AddTagHelpers<ShapeTagHelper>();
+                    services.AddTagHelpers<TimeSpanTagHelper>();
                     services.AddTagHelpers<ValidationMessageTagHelper>();
                     services.AddTagHelpers<ZoneTagHelper>();
                 });

src/OrchardCore/OrchardCore.DisplayManagement/TagHelpers/DateTimeTagHelper.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Razor.TagHelpers;
+
+namespace OrchardCore.DisplayManagement.TagHelpers
+{
+    [HtmlTargetElement("datetime")]
+    public class DateTimeTagHelper : TagHelper
+    {
+        private const string UtcAttribute = "utc";
+        private const string FormatAttribute = "format";
+
+        protected IShapeFactory _shapeFactory;
+        protected IDisplayHelper _displayHelper;
+
+        public DateTimeTagHelper(IShapeFactory shapeFactory, IDisplayHelper displayHelper)
+        {
+            _shapeFactory = shapeFactory;
+            _displayHelper = displayHelper;
+        }
+
+        [HtmlAttributeName(UtcAttribute)]
+        public DateTime? Utc { set; get; }
+
+        [HtmlAttributeName(FormatAttribute)]
+        public string Format { set; get; }
+
+        public async override Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
+        {
+            var shapeType = "DateTime";
+            dynamic shape = await _shapeFactory.CreateAsync(shapeType);
+            shape.Utc = Utc;
+            shape.Format = Format;
+
+            output.Content.SetHtmlContent(await _displayHelper.ShapeExecuteAsync(shape));
+
+            // We don't want any encapsulating tag around the shape
+            output.TagName = null;
+        }
+    }
+}

src/OrchardCore/OrchardCore.DisplayManagement/TagHelpers/TimeSpanTagHelper.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Razor.TagHelpers;
+
+namespace OrchardCore.DisplayManagement.TagHelpers
+{
+    [HtmlTargetElement("timespan")]
+    public class TimeSpanTagHelper : TagHelper
+    {
+        private const string UtcAttribute = "utc";
+        private const string OriginAttribute = "origin";
+
+        protected IShapeFactory _shapeFactory;
+        protected IDisplayHelper _displayHelper;
+
+        public TimeSpanTagHelper(IShapeFactory shapeFactory, IDisplayHelper displayHelper)
+        {
+            _shapeFactory = shapeFactory;
+            _displayHelper = displayHelper;
+        }
+
+        [HtmlAttributeName(UtcAttribute)]
+        public DateTime? Utc { set; get; }
+
+        [HtmlAttributeName(OriginAttribute)]
+        public DateTime? Origin { set; get; }
+
+        public async override Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
+        {
+            var shapeType = "TimeSpan";
+            dynamic shape = await _shapeFactory.CreateAsync(shapeType);
+            shape.Utc = Utc;
+            shape.Origin = Origin;
+
+            output.Content.SetHtmlContent(await _displayHelper.ShapeExecuteAsync(shape));
+
+            // We don't want any encapsulating tag around the shape
+            output.TagName = null;
+        }
+    }
+}