Adding ContentItemMetadata route values for widgets, blogs and blog posts

- also removing the default (Core.Contents specific) metadata from Orchard.ContentManagement.ContentItemMetadata

work items: 16683, 16791

--HG--
branch : dev

src/Orchard.Web/Modules/Orchard.Widgets/Handlers/WidgetPartHandler.cs

@@ -1,4 +1,6 @@
-using JetBrains.Annotations;
+using System.Web.Routing;
+using JetBrains.Annotations;
+using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
 using Orchard.Data;
 using Orchard.Widgets.Models;
@@ -9,5 +11,32 @@ namespace Orchard.Widgets.Handlers {
         public WidgetPartHandler(IRepository<WidgetPartRecord> widgetsRepository) {
             Filters.Add(StorageFilter.For(widgetsRepository));
         }
+
+        protected override void GetItemMetadata(GetContentItemMetadataContext context) {
+            var widget = context.ContentItem.As<WidgetPart>();
+
+            if (widget == null)
+                return;
+
+            // create needs to go through the add widget flow (index -> [select layer -> ] add [widget type] to layer)
+            context.Metadata.CreateRouteValues = new RouteValueDictionary {
+                {"Area", "Orchard.Widgets"},
+                {"Controller", "Admin"},
+                {"Action", "Index"}
+            };
+            context.Metadata.EditorRouteValues = new RouteValueDictionary {
+                {"Area", "Orchard.Widgets"},
+                {"Controller", "Admin"},
+                {"Action", "EditWidget"},
+                {"Id", context.ContentItem.Id}
+            };
+            // remove goes through edit widget...
+            context.Metadata.RemoveRouteValues = new RouteValueDictionary {
+                {"Area", "Orchard.Widgets"},
+                {"Controller", "Admin"},
+                {"Action", "EditWidget"},
+                {"Id", context.ContentItem.Id}
+            };
+        }
     }
 }