Merge

--HG--
branch : dev

src/Orchard.Tests/DisplayManagement/DefaultDisplayManagerTests.cs

@@ -145,6 +145,35 @@ namespace Orchard.Tests.DisplayManagement {
             Assert.That(result.ToString(), Is.EqualTo("Hi there!"));
         }
 
+        [Test]
+        public void RenderPreCalculatedShape() {
+            var displayManager = _container.Resolve<IDisplayManager>();
+
+            var shape = new Shape {
+                Metadata = new ShapeMetadata {
+                    Type = "Foo"
+                }
+            };
+
+            shape.Metadata.OnDisplaying(
+                context => {
+                    context.ChildContent = new HtmlString("Bar");
+                });
+
+            var descriptor = new ShapeDescriptor {
+                ShapeType = "Foo",
+            };
+            descriptor.Bindings["Foo"] = new ShapeBinding {
+                BindingName = "Foo",
+                Binding = ctx => new HtmlString("Hi there!"),
+            };
+
+            AddShapeDescriptor(descriptor);
+
+            var result = displayManager.Execute(CreateDisplayContext(shape));
+            Assert.That(result.ToString(), Is.EqualTo("Bar"));
+        }
+
         [Test]
         public void RenderFallbackShape() {
             var displayManager = _container.Resolve<IDisplayManager>();

src/Orchard.Web/Core/Contents/Shapes.cs

@@ -1,4 +1,7 @@
-using Orchard.ContentManagement;
+using System;
+using System.Linq;
+using System.Web;
+using Orchard.ContentManagement;
 using Orchard.DisplayManagement.Descriptors;
 
 namespace Orchard.Core.Contents {
@@ -12,16 +15,19 @@ namespace Orchard.Core.Contents {
                 .OnDisplaying(displaying => {
                     ContentItem contentItem = displaying.Shape.ContentItem;
                     if (contentItem != null) {
-                        //Content-BlogPost
+                        // Content__[ContentType] e.g. Content-BlogPost
                         displaying.ShapeMetadata.Alternates.Add("Content__" + contentItem.ContentType);
-                        //Content-42
-                        displaying.ShapeMetadata.Alternates.Add("Content__" + contentItem.Id);
-                        //Content.Summary
-                        displaying.ShapeMetadata.Alternates.Add("Content_" + displaying.ShapeMetadata.DisplayType);
-                        //Content-Page.Summary
+
+                        // Content_[DisplayType]__[ContentType] e.g. Content-BlogPost.Summary
                         displaying.ShapeMetadata.Alternates.Add("Content_" + displaying.ShapeMetadata.DisplayType + "__" + contentItem.ContentType);
 
-                        if (!displaying.ShapeMetadata.DisplayType.Contains("Admin"))
+                        // Content__[Id] e.g. Content-42
+                        displaying.ShapeMetadata.Alternates.Add("Content__" + contentItem.Id);
+
+                        // Content_[DisplayType]__[Id] e.g. Content-42.Summary
+                        displaying.ShapeMetadata.Alternates.Add("Content_" +  displaying.ShapeMetadata.DisplayType + "__" + contentItem.Id);
+
+                        if ( !displaying.ShapeMetadata.DisplayType.Contains("Admin") )
                             displaying.ShapeMetadata.Wrappers.Add("Content_ControlWrapper");
                     }
                 });

src/Orchard.Web/Core/Contents/Views/Admin/Create.cshtml

@@ -7,6 +7,6 @@
 
 @using (Html.BeginFormAntiForgeryPost()) {
     @Html.ValidationSummary()
-// Model is a Shape, calling Display() so that it is rendered using the most specific template for its Shape type
+    // Model is a Shape, calling Display() so that it is rendered using the most specific template for its Shape type
     @Display(Model)
 }

src/Orchard.Web/Core/Shapes/CoreShapes.cs

@@ -9,6 +9,7 @@ using System.Web.Mvc.Html;
 using Orchard.DisplayManagement;
 using Orchard.DisplayManagement.Descriptors;
 using Orchard.DisplayManagement.Descriptors.ResourceBindingStrategy;
+using Orchard.Environment;
 using Orchard.Mvc;
 using Orchard.Settings;
 using Orchard.UI;
@@ -20,23 +21,20 @@ using Orchard.Utility.Extensions;
 
 namespace Orchard.Core.Shapes {
     public class CoreShapes : IShapeTableProvider {
-        private readonly IWorkContextAccessor _workContextAccessor;
-        private readonly IHttpContextAccessor _httpContextAccessor;
+        private readonly Work<WorkContext> _workContext;
+        private readonly Work<IResourceManager> _resourceManager;
+        private readonly Work<IHttpContextAccessor> _httpContextAccessor;
 
-        public CoreShapes(IWorkContextAccessor workContextAccessor, IHttpContextAccessor httpContextAccessor) {
-            // needed to get CurrentSite.
-            // note that injecting ISiteService here causes a stack overflow in AutoFac!
-            _workContextAccessor = workContextAccessor;
+        public CoreShapes(
+            Work<WorkContext> workContext, 
+            Work<IResourceManager> resourceManager,
+            Work<IHttpContextAccessor> httpContextAccessor
+            ) {
+            _workContext = workContext;
+            _resourceManager = resourceManager;
             _httpContextAccessor = httpContextAccessor;
         }
 
-        // not injected the usual way because this component is a 'static' dependency and RM is per-request
-        private IResourceManager ResourceManager {
-            get {
-                return _workContextAccessor.GetContext(_httpContextAccessor.Current()).Resolve<IResourceManager>();
-            }
-        }
-
         public void Discover(ShapeTableBuilder builder) {
             // the root page shape named 'Layout' is wrapped with 'Document'
             // and has an automatic zone creating behavior
@@ -54,6 +52,7 @@ namespace Orchard.Core.Shapes {
                     layout.Content = created.New.Zone();
                     layout.Content.ZoneName = "Content";
                     layout.Content.Add(created.New.PlaceChildContent(Source: layout));
+
                 });
 
             // 'Zone' shapes are built on the Zone base class
@@ -66,6 +65,8 @@ namespace Orchard.Core.Shapes {
                     string zoneName = zone.ZoneName;
                     zone.Classes.Add("zone-" + zoneName.HtmlClassify());
                     zone.Classes.Add("zone");
+
+                    // Zone__[ZoneName] e.g. Zone-SideBar
                     zone.Metadata.Alternates.Add("Zone__" + zoneName);
                 });
 
@@ -208,25 +209,25 @@ namespace Orchard.Core.Shapes {
         [Shape]
         public void HeadScripts(dynamic Display, TextWriter Output) {
             WriteResources(Display, Output, "script", ResourceLocation.Head, null);
-            WriteLiteralScripts(Output, ResourceManager.GetRegisteredHeadScripts());
+            WriteLiteralScripts(Output, _resourceManager.Value.GetRegisteredHeadScripts());
         }
 
         [Shape]
         public void FootScripts(dynamic Display, TextWriter Output) {
             WriteResources(Display, Output, "script", null, ResourceLocation.Head);
-            WriteLiteralScripts(Output, ResourceManager.GetRegisteredFootScripts());
+            WriteLiteralScripts(Output, _resourceManager.Value.GetRegisteredFootScripts());
         }
 
         [Shape]
         public void Metas(TextWriter Output) {
-            foreach (var meta in ResourceManager.GetRegisteredMetas()) {
+            foreach (var meta in _resourceManager.Value.GetRegisteredMetas() ) {
                 Output.WriteLine(meta.GetTag());
             }
         }
 
         [Shape]
         public void HeadLinks(TextWriter Output) {
-            foreach (var link in ResourceManager.GetRegisteredLinks()) {
+            foreach (var link in _resourceManager.Value.GetRegisteredLinks() ) {
                 Output.WriteLine(link.GetTag());
             }
         }
@@ -257,7 +258,7 @@ namespace Orchard.Core.Shapes {
 
         private void WriteResources(dynamic Display, TextWriter Output, string resourceType, ResourceLocation? includeLocation, ResourceLocation? excludeLocation) {
             bool debugMode;
-            var site = _workContextAccessor.GetContext(_httpContextAccessor.Current()).CurrentSite;
+            var site = _workContext.Value.CurrentSite;
             switch (site.ResourceDebugMode) {
                 case ResourceDebugMode.Enabled:
                     debugMode = true;
@@ -267,15 +268,15 @@ namespace Orchard.Core.Shapes {
                     break;
                 default:
                     Debug.Assert(site.ResourceDebugMode == ResourceDebugMode.FromAppSetting, "Unknown ResourceDebugMode value.");
-                    debugMode = _httpContextAccessor.Current().IsDebuggingEnabled;
+                    debugMode = _httpContextAccessor.Value.Current().IsDebuggingEnabled;
                     break;
             }
             var defaultSettings = new RequireSettings {
                 DebugMode = debugMode,
                 Culture = CultureInfo.CurrentUICulture.Name,
             };
-            var requiredResources = ResourceManager.BuildRequiredResources(resourceType);
-            var appPath = _httpContextAccessor.Current().Request.ApplicationPath;
+            var requiredResources = _resourceManager.Value.BuildRequiredResources(resourceType);
+            var appPath = _httpContextAccessor.Value.Current().Request.ApplicationPath;
             foreach (var context in requiredResources.Where(r =>
                 (includeLocation.HasValue ? r.Settings.Location == includeLocation.Value : true) &&
                 (excludeLocation.HasValue ? r.Settings.Location != excludeLocation.Value : true))) {

src/Orchard.Web/Modules/Orchard.Blogs/Views/BlogAdmin/Item.cshtml

@@ -1,5 +1,5 @@
 @{
     Html.AddTitleParts(T("Manage Blog").ToString());
 }
-    // Model is a Shape, calling Display() so that it is rendered using the most specific template for its Shape type
+    @* Model is a Shape, calling Display() so that it is rendered using the most specific template for its Shape type *@
     @Display(Model)

src/Orchard.Web/Modules/Orchard.DesignerTools/Module.txt

@@ -11,3 +11,7 @@ Features:
         Category: Designer
         Description: Displays all currently displayed shapes and some information to customize them
         Dependencies: Orchard.jQuery
+    UrlAlternates:
+        Name: Url Alternates
+        Category: Designer
+        Description: Adds shape alternates for specific urls

src/Orchard.Web/Modules/Orchard.DesignerTools/Orchard.DesignerTools.csproj

@@ -83,6 +83,7 @@
   <ItemGroup>
     <Compile Include="Services\ObjectDumper.cs" />
     <Compile Include="Services\ShapeTracingFactory.cs" />
+    <Compile Include="Services\UrlAlternatesFactory.cs" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="Views\ShapeTracing.Wrapper.cshtml" />

src/Orchard.Web/Modules/Orchard.DesignerTools/Services/UrlAlternatesFactory.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using Orchard.DisplayManagement.Implementation;
+using Orchard.Environment.Extensions;
+using Orchard.Mvc;
+
+namespace Orchard.DesignerTools.Services {
+    [OrchardFeature("UrlAlternates")]
+    public class UrlAlternatesFactory : ShapeDisplayEvents {
+        private readonly IHttpContextAccessor _httpContextAccessor;
+        private readonly List<string> _urlAlternates;
+
+        public UrlAlternatesFactory(IHttpContextAccessor httpContextAccessor) {
+            _httpContextAccessor = httpContextAccessor;
+
+            var request = _httpContextAccessor.Current().Request;
+
+                // extract each segment of the url
+                var urlSegments = VirtualPathUtility.ToAppRelative(request.Path.ToLower())
+                    .Split('/')
+                    .Skip(1) // ignore the heading ~ segment 
+                    .Select(url => url.Replace("-", "__").Replace(".", "_")) // format the alternate
+                    .ToArray();
+
+                if ( String.IsNullOrWhiteSpace(urlSegments[0]) ) {
+                    urlSegments[0] = "homepage";
+                }
+
+                _urlAlternates = Enumerable.Range(1, urlSegments.Count()).Select(range => String.Join("__", urlSegments.Take(range))).ToList();
+        }
+
+        public override void Displaying(ShapeDisplayingContext context) {
+
+            context.ShapeMetadata.OnDisplaying(displayedContext => {
+                // appends Url alternates to current ones
+                displayedContext.ShapeMetadata.Alternates = displayedContext.ShapeMetadata.Alternates.SelectMany(
+                    alternate => new [] { alternate }.Union(_urlAlternates.Select(a => alternate + "__url__" + a))
+                    ).ToList();
+
+                // appends [ShapeType__url__[Url] alternates
+                displayedContext.ShapeMetadata.Alternates = _urlAlternates.Select(url => displayedContext.ShapeMetadata.Type + "__url__" + url)
+                    .Union(displayedContext.ShapeMetadata.Alternates)
+                    .ToList();
+            });
+
+        }
+    }
+}

src/Orchard.Web/Modules/Orchard.Widgets/Shapes.cs

@@ -25,8 +25,12 @@ namespace Orchard.Widgets {
                         widget.Classes.Add("widget-" + contentItem.ContentType.HtmlClassify());
 
                         var zoneName = contentItem.As<WidgetPart>().Zone;
-                        displaying.ShapeMetadata.Alternates.Add("Widget__" + contentItem.ContentType);
+
+                        // Widget__[ZoneName] e.g. Widget-SideBar
                         displaying.ShapeMetadata.Alternates.Add("Widget__" + zoneName);
+
+                        // Widget__[ContentType] e.g. Widget-BlogArchive
+                        displaying.ShapeMetadata.Alternates.Add("Widget__" + contentItem.ContentType);
                     }
                 });
         }

src/Orchard/ContentManagement/Drivers/ContentFieldDriver.cs

@@ -44,7 +44,6 @@ namespace Orchard.ContentManagement.Drivers {
             return contentFieldInfo;
         }
 
-
         protected virtual DriverResult Display(ContentPart part, TField field, string displayType, dynamic shapeHelper) { return null; }
         protected virtual DriverResult Editor(ContentPart part, TField field, dynamic shapeHelper) { return null; }
         protected virtual DriverResult Editor(ContentPart part, TField field, IUpdateModel updater, dynamic shapeHelper) { return null; }
@@ -69,30 +68,77 @@ namespace Orchard.ContentManagement.Drivers {
             return new ContentShapeResult(shapeType, Prefix, ctx => AddAlternates(shapeBuilder(ctx), differentiator)).Differentiator(differentiator);
         }
 
-        private object AddAlternates(dynamic shape, string differentiator) {
+        private static object AddAlternates(dynamic shape, string differentiator) {
             // automatically add shape alternates for shapes added by fields
-            // [ShapeType__FieldName] for ShapeType-FieldName.cshtml templates
-            // [ShapeType__PartName] for ShapeType-PartName.cshtml templates
-            // [ShapeType__PartName__FieldName] for ShapeType-PartName-FieldName.cshtml templates
-
             // for fields on dynamic parts the part name is the same as the content type name
-            // ex. Fields/Common.Text-Something.FirstName
 
             ShapeMetadata metadata = shape.Metadata;
-            if (!string.IsNullOrEmpty(differentiator))
-                metadata.Alternates.Add(metadata.Type + "__" + differentiator);
-
             ContentPart part = shape.ContentPart;
-            if (part != null) {
-                metadata.Alternates.Add(metadata.Type + "__" + part.PartDefinition.Name);
-                if (!string.IsNullOrEmpty(differentiator))
-                    metadata.Alternates.Add(metadata.Type + "__" + part.PartDefinition.Name + "__" + differentiator);
+            var shapeType = metadata.Type;
+            var fieldName = differentiator ?? String.Empty;
+            var partName = part != null ? part.PartDefinition.Name : String.Empty;
+            var contentType = part != null ? part.ContentItem.ContentType : String.Empty;
+            var displayType = metadata.DisplayType ?? String.Empty;
+            var dynamicType = string.Equals(partName, contentType, StringComparison.Ordinal);
+
+            // [ShapeType__FieldName] e.g. Fields/Common.Text-Teaser
+            if ( !string.IsNullOrEmpty(fieldName) )
+                metadata.Alternates.Add(shapeType + "__" + fieldName);
+
+            // [ShapeType__PartName] e.g. Fields/Common.Text-TeaserPart
+            if ( !string.IsNullOrEmpty(partName) ) {
+                metadata.Alternates.Add(shapeType + "__" + partName);
+            }
+
+            // [ShapeType]__[ContentType]__[PartName] e.g. Fields/Common.Text-Blog-TeaserPart
+            if ( !string.IsNullOrEmpty(partName) && !string.IsNullOrEmpty(contentType) && !dynamicType ) {
+                metadata.Alternates.Add(shapeType + "__" + contentType + "__" + partName);
+            }
+
+            // [ShapeType]_[DisplayType]__[FieldName] e.g. Fields/Common.Text-Teaser.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(fieldName) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + fieldName);
+            }
+
+            // [ShapeType]__[PartName]__[FieldName] e.g. Fields/Common.Text-TeaserPart-Teaser
+            if ( !string.IsNullOrEmpty(partName) && !string.IsNullOrEmpty(fieldName) ) {
+                metadata.Alternates.Add(shapeType + "__" + partName + "__" + fieldName);
+            }
+
+            // [ShapeType]__[ContentType]__[FieldName] e.g. Fields/Common.Text-Blog-Teaser
+            if ( !string.IsNullOrEmpty(contentType) && !string.IsNullOrEmpty(fieldName) ) {
+                metadata.Alternates.Add(shapeType + "__" + contentType + "__" + fieldName);
+            }
+
+            // [ShapeType]__[ContentType]__[PartName]__[FieldName] e.g. Fields/Common.Text-Blog-TeaserPart-Teaser
+            if ( !string.IsNullOrEmpty(contentType) && !string.IsNullOrEmpty(partName) && !string.IsNullOrEmpty(fieldName) && !dynamicType ) {
+                metadata.Alternates.Add(shapeType + "__" + contentType + "__" + partName );
+            }
+            
+            // [ShapeType]_[DisplayType]__[PartName] e.g. Fields/Common.Text-TeaserPart.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(partName) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + partName);
+            }
+
+            // [ShapeType]_[DisplayType]__[ContentType]__[PartName] e.g. Fields/Common.Text-Blog-TeaserPart.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(contentType) && !string.IsNullOrEmpty(partName) && !dynamicType ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + contentType + "__" + partName);
+            }
+
+            // [ShapeType]_[DisplayType]__[PartName]__[FieldName] e.g. Fields/Common.Text-TeaserPart-Teaser.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(partName) && !string.IsNullOrEmpty(fieldName) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + partName + "__" + fieldName);
+            }
+
+            // [ShapeType]_[DisplayType]__[ContentType]__[PartName]__[FieldName] e.g. Fields/Common.Text-Blog-TeaserPart-Teaser.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(contentType) && !string.IsNullOrEmpty(partName) && !dynamicType && !string.IsNullOrEmpty(fieldName) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + contentType + "__" + partName + "__" + fieldName);
             }
 
             return shape;
         }
 
-        private object CreateShape(BuildShapeContext context, string shapeType) {
+        private static object CreateShape(BuildShapeContext context, string shapeType) {
             IShapeFactory shapeFactory = context.New;
             return shapeFactory.Create(shapeType);
         }

src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using Orchard.ContentManagement.Handlers;
 using Orchard.ContentManagement.MetaData;
 using Orchard.DisplayManagement;
+using Orchard.DisplayManagement.Shapes;
 
 namespace Orchard.ContentManagement.Drivers {
     public abstract class ContentPartDriver<TContent> : IContentPartDriver where TContent : ContentPart, new() {
@@ -47,10 +48,46 @@ namespace Orchard.ContentManagement.Drivers {
         }
 
         private ContentShapeResult ContentShapeImplementation(string shapeType, Func<BuildShapeContext, object> shapeBuilder) {
-            return new ContentShapeResult(shapeType, Prefix, shapeBuilder);
+            return new ContentShapeResult(shapeType, Prefix, ctx => AddAlternates(shapeBuilder(ctx)));
         }
 
-        private object CreateShape(BuildShapeContext context, string shapeType) {
+        private static object AddAlternates(dynamic shape) {
+            ShapeMetadata metadata = shape.Metadata;
+            ContentPart part = shape.ContentPart;
+            var id = part != null ? part.ContentItem.Id.ToString() : String.Empty;
+            var shapeType = metadata.Type;
+            var contentType = part != null ? part.ContentItem.ContentType : String.Empty;
+            var displayType = metadata.DisplayType ?? String.Empty;
+
+            // [ShapeType]__[Id] e.g. Parts/Common.Metadata-42
+            if ( !string.IsNullOrEmpty(id) ) {
+                metadata.Alternates.Add(shapeType + "__" + id);
+            }
+
+            // [ShapeType]__[ContentType] e.g. Parts/Common.Metadata-BlogPost
+            if ( !string.IsNullOrEmpty(contentType) ) {
+                metadata.Alternates.Add(shapeType + "__" + contentType);
+            }
+
+            // [ShapeType]_[DisplayType] e.g. Parts/Common.Metadata.Summary
+            if ( !string.IsNullOrEmpty(displayType) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType);
+            }
+
+            // [ShapeType]_[DisplayType]__[ContentType] e.g. Parts/Common.Metadata-BlogPost.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(contentType) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + contentType);
+            }
+
+            // [ShapeType]_[DisplayType]__[Id] e.g. Parts/Common.Metadata-42.Summary
+            if ( !string.IsNullOrEmpty(displayType) && !string.IsNullOrEmpty(id) ) {
+                metadata.Alternates.Add(shapeType + "_" + displayType + "__" + id);
+            }
+
+            return shape;
+        }
+
+        private static object CreateShape(BuildShapeContext context, string shapeType) {
             IShapeFactory shapeFactory = context.New;
             return shapeFactory.Create(shapeType);
         }

src/Orchard/DisplayManagement/Implementation/DefaultDisplayManager.cs

@@ -68,13 +68,22 @@ namespace Orchard.DisplayManagement.Implementation {
                 shapeBinding.ShapeDescriptor.Displaying.Invoke(action => action(displayingContext), Logger);
             }
 
-            // now find the actual binding to render, taking alternates into account
-            ShapeBinding actualBinding;
-            if (TryGetDescriptorBinding(shapeMetadata.Type, shapeMetadata.Alternates, shapeTable, out actualBinding)) {
-                shape.Metadata.ChildContent = Process(actualBinding, shape, context);
+            // invoking ShapeMetadata displaying events
+            shapeMetadata.Displaying.Invoke(action => action(displayingContext), Logger);
+
+            // use pre-fectched content if available (e.g. coming from specific cache implmentation)
+            if ( displayingContext.ChildContent != null ) {
+                shape.Metadata.ChildContent = displayingContext.ChildContent;
             }
             else {
-                throw new OrchardException(T("Shape type {0} not found", shapeMetadata.Type));
+                // now find the actual binding to render, taking alternates into account
+                ShapeBinding actualBinding;
+                if ( TryGetDescriptorBinding(shapeMetadata.Type, shapeMetadata.Alternates, shapeTable, out actualBinding) ) {
+                    shape.Metadata.ChildContent = Process(actualBinding, shape, context);
+                }
+                else {
+                    throw new OrchardException(T("Shape type {0} not found", shapeMetadata.Type));
+                }
             }
 
             foreach (var frameType in shape.Metadata.Wrappers) {
@@ -108,6 +117,9 @@ namespace Orchard.DisplayManagement.Implementation {
                 }, Logger);
             }
 
+            // invoking ShapeMetadata displayed events
+            shapeMetadata.Displayed.Invoke(action => action(displayedContext), Logger);
+
             return shape.Metadata.ChildContent;
         }
 

src/Orchard/DisplayManagement/Implementation/IShapeDisplayEvents.cs

@@ -10,6 +10,7 @@ namespace Orchard.DisplayManagement.Implementation {
     public class ShapeDisplayingContext {
         public dynamic Shape { get; set; }
         public ShapeMetadata ShapeMetadata { get; set; }
+        public IHtmlString ChildContent { get; set; }
     }
 
     public class ShapeDisplayedContext {

src/Orchard/DisplayManagement/Shapes/ShapeMetadata.cs

@@ -1,11 +1,16 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Web;
+using Orchard.DisplayManagement.Implementation;
 
 namespace Orchard.DisplayManagement.Shapes {
     public class ShapeMetadata {
         public ShapeMetadata() {
             Wrappers = new List<string>();
             Alternates = new List<string>();
+            Displaying = Enumerable.Empty<Action<ShapeDisplayingContext>>();
+            Displayed = Enumerable.Empty<Action<ShapeDisplayedContext>>();
         }
 
         public string Type { get; set; }
@@ -17,5 +22,18 @@ namespace Orchard.DisplayManagement.Shapes {
 
         public bool WasExecuted { get; set; }
         public IHtmlString ChildContent { get; set; }
+
+        public IEnumerable<Action<ShapeDisplayingContext>> Displaying { get; private set; }
+        public IEnumerable<Action<ShapeDisplayedContext>> Displayed { get; private set; }
+
+        public void OnDisplaying(Action<ShapeDisplayingContext> action) {
+            var existing = Displaying ?? Enumerable.Empty<Action<ShapeDisplayingContext>>();
+            Displaying = existing.Concat(new[] { action });
+        }
+
+        public void OnDisplayed(Action<ShapeDisplayedContext> action) {
+            var existing = Displayed ?? Enumerable.Empty<Action<ShapeDisplayedContext>>();
+            Displayed = existing.Concat(new[] { action });
+        }
     }
 }

src/Orchard/Environment/WorkContextModule.cs

@@ -1,5 +1,13 @@
-using System.Web;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Web;
 using Autofac;
+using Autofac.Builder;
+using Autofac.Core;
+using Autofac.Features.Metadata;
+using Module = Autofac.Module;
 
 namespace Orchard.Environment {
     public class WorkContextModule : Module {
@@ -19,6 +27,96 @@ namespace Orchard.Environment {
             builder.Register(ctx => ctx.Resolve<WorkContextProperty<HttpContextBase>>().Value)
                 .As<HttpContextBase>()
                 .InstancePerDependency();
+
+            builder.RegisterGeneric(typeof(WorkValues<>))
+                .InstancePerMatchingLifetimeScope("work");
+
+            builder.RegisterSource(new WorkRegistrationSource());
+        }
+    }
+
+    public class Work<T> where T : class {
+        private readonly Func<Work<T>, T> _resolve;
+
+        public Work(Func<Work<T>, T> resolve) {
+            _resolve = resolve;
+        }
+
+        public T Value {
+            get { return _resolve(this); }
+        }
+    }
+
+
+    class WorkValues<T> where T : class {
+        public WorkValues(IComponentContext componentContext) {
+            ComponentContext = componentContext;
+            Values = new Dictionary<Work<T>, T>();
+        }
+
+        public IComponentContext ComponentContext { get; private set; }
+        public IDictionary<Work<T>, T> Values { get; private set; }
+    }
+
+    /// <summary>
+    /// Support the <see cref="Meta{T}"/>
+    /// types automatically whenever type T is registered with the container.
+    /// Metadata values come from the component registration's metadata.
+    /// </summary>
+    class WorkRegistrationSource : IRegistrationSource {
+        static readonly MethodInfo CreateMetaRegistrationMethod = typeof(WorkRegistrationSource).GetMethod(
+            "CreateMetaRegistration", BindingFlags.Static | BindingFlags.NonPublic);
+
+        private static bool IsClosingTypeOf(Type type, Type openGenericType) {
+            return type.IsGenericType && type.GetGenericTypeDefinition() == openGenericType;
+        }
+
+        public IEnumerable<IComponentRegistration> RegistrationsFor(Service service, Func<Service, IEnumerable<IComponentRegistration>> registrationAccessor) {
+            var swt = service as IServiceWithType;
+            if (swt == null || !IsClosingTypeOf(swt.ServiceType, typeof(Work<>)))
+                return Enumerable.Empty<IComponentRegistration>();
+
+            var valueType = swt.ServiceType.GetGenericArguments()[0];
+
+            var valueService = swt.ChangeType(valueType);
+
+            var registrationCreator = CreateMetaRegistrationMethod.MakeGenericMethod(valueType);
+
+            return registrationAccessor(valueService)
+                .Select(v => registrationCreator.Invoke(null, new object[] { service, v }))
+                .Cast<IComponentRegistration>();
+        }
+
+        public bool IsAdapterForIndividualComponents {
+            get { return true; }
+        }
+
+        static IComponentRegistration CreateMetaRegistration<T>(Service providedService, IComponentRegistration valueRegistration) where T : class {
+            var rb = RegistrationBuilder.ForDelegate(
+                (c, p) => {
+                    var workContextAccessor = c.Resolve<IWorkContextAccessor>();
+                    return new Work<T>(w => {
+                        var workContext = workContextAccessor.GetContext();
+                        if (workContext == null)
+                            return default(T);
+
+                        var workValues = workContext.Resolve<WorkValues<T>>();
+
+                        T value;
+                        if (!workValues.Values.TryGetValue(w, out value)) {
+                            value = (T)workValues.ComponentContext.Resolve(valueRegistration, p);
+                            workValues.Values[w] = value;
+                        }
+                        else {
+                            int x = 5;
+                        }
+                        return value;
+                    });
+                })
+                .As(providedService)
+                .Targeting(valueRegistration);
+
+            return rb.CreateRegistration();
         }
     }
 }