- Handler for content fields.

- Relies on the Activated event to weld fields to parts.
- New event Initializing added to the content management lifecycle, old Activated event is now Initializing.
- Unifying part and field template result classes.
- Refactoring.

--HG--
branch : dev

src/Orchard.Web/Core/Common/Handlers/CommonAspectHandler.cs

@@ -1,11 +1,9 @@
 using JetBrains.Annotations;
 using Orchard.Core.Common.Models;
-using Orchard.Core.Common.ViewModels;
 using Orchard.Data;
 using Orchard.Localization;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
-using Orchard.ContentManagement.ViewModels;
 using Orchard.Security;
 using Orchard.Services;
 
@@ -37,10 +35,10 @@ namespace Orchard.Core.Common.Handlers {
             Filters.Add(StorageFilter.For(commonRepository));
             Filters.Add(StorageFilter.For(commonVersionRepository));
 
-            OnActivated<CommonAspect>(PropertySetHandlers);
+            OnInitializing<CommonAspect>(PropertySetHandlers);
-            OnActivated<CommonAspect>(AssignCreatingOwner);
+            OnInitializing<CommonAspect>(AssignCreatingOwner);
-            OnActivated<ContentPart<CommonRecord>>(AssignCreatingDates);
+            OnInitializing<ContentPart<CommonRecord>>(AssignCreatingDates);
-            OnActivated<ContentPart<CommonVersionRecord>>(AssignCreatingDates);
+            OnInitializing<ContentPart<CommonVersionRecord>>(AssignCreatingDates);
 
             OnLoaded<CommonAspect>(LazyLoadHandlers);
 
@@ -67,20 +65,20 @@ namespace Orchard.Core.Common.Handlers {
         public Localizer T { get; set; }
 
 
-        void AssignCreatingOwner(ActivatedContentContext context, CommonAspect part) {
+        void AssignCreatingOwner(InitializingContentContext context, CommonAspect part) {
             // and use the current user as Owner
             if (part.Record.OwnerId == 0) {
                 part.Owner = _authenticationService.GetAuthenticatedUser();
             }
         }
 
-        void AssignCreatingDates(ActivatedContentContext context, ContentPart<CommonRecord> part) {
+        void AssignCreatingDates(InitializingContentContext context, ContentPart<CommonRecord> part) {
             // assign default create/modified dates
             part.Record.CreatedUtc = _clock.UtcNow;
             part.Record.ModifiedUtc = _clock.UtcNow;
         }
 
-        void AssignCreatingDates(ActivatedContentContext context, ContentPart<CommonVersionRecord> part) {
+        void AssignCreatingDates(InitializingContentContext context, ContentPart<CommonVersionRecord> part) {
             // assign default create/modified dates
             part.Record.CreatedUtc = _clock.UtcNow;
             part.Record.ModifiedUtc = _clock.UtcNow;
@@ -124,7 +122,7 @@ namespace Orchard.Core.Common.Handlers {
             aspect.ContainerField.Loader(() => aspect.Record.Container == null ? null : _contentManager.Get(aspect.Record.Container.Id));
         }
 
-        static void PropertySetHandlers(ActivatedContentContext context, CommonAspect aspect) {
+        static void PropertySetHandlers(InitializingContentContext context, CommonAspect aspect) {
             // add handlers that will update records when aspect properties are set
 
             aspect.OwnerField.Setter(user => {

src/Orchard.Web/Core/Localization/Handlers/LocalizedHandler.cs

@@ -5,7 +5,6 @@ using Orchard.Localization;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
 using Orchard.Localization.Services;
-using Orchard.Settings;
 
 namespace Orchard.Core.Localization.Handlers {
     [UsedImplicitly]
@@ -20,7 +19,7 @@ namespace Orchard.Core.Localization.Handlers {
 
             Filters.Add(StorageFilter.For(localizedRepository));
 
-            OnActivated<Localized>(InitializePart);
+            OnInitializing<Localized>(InitializePart);
 
             OnLoaded<Localized>(LazyLoadHandlers);
 
@@ -34,7 +33,7 @@ namespace Orchard.Core.Localization.Handlers {
             localized.MasterContentItemField.Loader(ctx => _contentManager.Get(localized.Record.MasterContentItemId)); 
         }
 
-        void InitializePart(ActivatedContentContext context, Localized localized) {
+        void InitializePart(InitializingContentContext context, Localized localized) {
             localized.CultureField.Setter(cultureRecord => {
                 localized.Record.CultureId = cultureRecord.Id;
                 return cultureRecord;

src/Orchard.Web/Core/Navigation/Handlers/MenuPartHandler.cs

@@ -13,7 +13,7 @@ namespace Orchard.Core.Navigation.Handlers {
             Filters.Add(new ActivatingFilter<MenuPart>("menuitem"));
             Filters.Add(StorageFilter.For(menuPartRepository));
 
-            OnActivated<MenuPart>((ctx, x) => {
+            OnInitializing<MenuPart>((ctx, x) => {
                                       x.OnMainMenu = false;
                                       x.MenuText = String.Empty;
                                   });

src/Orchard.Web/Modules/Orchard.Blogs/Handlers/BlogPostHandler.cs

@@ -8,9 +8,7 @@ using Orchard.Blogs.Services;
 using Orchard.ContentManagement;
 using Orchard.Core.Common.Models;
 using Orchard.ContentManagement.Handlers;
-using Orchard.Core.Common.Services;
 using Orchard.Localization;
-using Orchard.UI.Notify;
 
 namespace Orchard.Blogs.Handlers {
     [UsedImplicitly]
@@ -40,7 +38,7 @@ namespace Orchard.Blogs.Handlers {
                      blog.PostCount = posts.Count;
                  });
 
-            OnActivated<BlogPost>((context, bp) => {
+            OnInitializing<BlogPost>((context, bp) => {
                 var blogSlug = requestContext.RouteData.Values.ContainsKey("blogSlug") ? requestContext.RouteData.Values["blogSlug"] as string : null;
                 if (!string.IsNullOrEmpty(blogSlug)) {
                     bp.Blog = blogService.Get(blogSlug);

src/Orchard.Web/Modules/Orchard.Comments/Handlers/HasCommentsHandler.cs

@@ -16,7 +16,7 @@ namespace Orchard.Comments.Handlers {
 
             Filters.Add(StorageFilter.For(hasCommentsRepository));
 
-            OnActivated<HasComments>((ctx, x) => {
+            OnInitializing<HasComments>((ctx, x) => {
                 x.CommentsActive = true;
                 x.CommentsShown = true;
             });

src/Orchard.Web/Modules/Orchard.Media/Handlers/MediaSettingsHandler.cs

@@ -9,10 +9,10 @@ namespace Orchard.Media.Handlers {
         public MediaSettingsHandler(IRepository<MediaSettingsRecord> repository) {
             Filters.Add(new ActivatingFilter<MediaSettings>("site"));
             Filters.Add(StorageFilter.For(repository) );
-            OnActivated<MediaSettings>(DefaultSettings);
+            OnInitializing<MediaSettings>(DefaultSettings);
         }
 
-        private static void DefaultSettings(ActivatedContentContext context, MediaSettings settings) {
+        private static void DefaultSettings(InitializingContentContext context, MediaSettings settings) {
             settings.Record.RootMediaFolder = "~/Media";
         }
     }

src/Orchard/ContentManagement/ContentField.cs

@@ -1,9 +1,9 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using Orchard.ContentManagement.MetaData.Models;
-using Orchard.ContentManagement.Utilities;
 
 namespace Orchard.ContentManagement {
-    public class ContentField : ContentPart {
+    public class ContentField {
         public virtual ContentPart ContentPart { get; set; }
         public string Name { get { return PartFieldDefinition.Name; } }
         public IDictionary<string, string> Settings { get; private set; }
@@ -11,10 +11,15 @@ namespace Orchard.ContentManagement {
         public new ContentPartDefinition PartDefinition { get { return ContentPart.PartDefinition; } }
         public ContentPartDefinition.Field PartFieldDefinition { get; set; }
         public ContentFieldDefinition FieldDefinition { get { return PartFieldDefinition.FieldDefinition; } }
+
+        public Func<string, string> Getter { get; set; }
+        public Action<string, string> Setter { get; set; }
     }
 
-    public class ContentField<TRecord> : ContentField {
+    //public class AddressField : ContentField {
-        public readonly LazyField<TRecord> _record = new LazyField<TRecord>();
+    //    public string Zip { 
-        public TRecord Record { get { return _record.Value; } set { _record.Value = value; } }
+    //        get {return Getter("zip");}
-    }
+    //        set { Setter("zip", value); }
+    //    }
+    //}
 }

src/Orchard/ContentManagement/ContentPart.cs

@@ -21,12 +21,10 @@ namespace Orchard.ContentManagement {
 
 
         public bool Has(Type fieldType, string fieldName) {
-            return fieldType == typeof(ContentItem) || _fields.Any(field => fieldType.IsAssignableFrom(field.GetType()) && field.Name == fieldName);
+            return _fields.Any(field => fieldType.IsAssignableFrom(field.GetType()) && field.Name == fieldName);
         }
 
-        public IContent Get(Type fieldType, string fieldName) {
+        public ContentField Get(Type fieldType, string fieldName) {
-            if (fieldType == typeof(ContentItem))
-                return this;
             return _fields.FirstOrDefault(field => fieldType.IsAssignableFrom(field.GetType()) && field.Name == fieldName);
         }
 

src/Orchard/ContentManagement/DefaultContentManager.cs

@@ -5,7 +5,6 @@ using Autofac;
 using Orchard.ContentManagement.Handlers;
 using Orchard.ContentManagement.MetaData;
 using Orchard.ContentManagement.MetaData.Builders;
-using Orchard.ContentManagement.MetaData.Models;
 using Orchard.ContentManagement.Records;
 using Orchard.Data;
 using Orchard.Mvc.ViewModels;
@@ -78,8 +77,18 @@ namespace Orchard.ContentManagement {
                 handler.Activated(context2);
             }
 
+            var context3 = new InitializingContentContext {
+                ContentType = contentType,
+                ContentItem = context.Builder.Build()
+            };
+            context3.ContentItem.ContentManager = this;
+
+            foreach (var handler in Handlers) {
+                handler.Initializing(context3);
+            }
+
             // composite result is returned
-            return context2.ContentItem;
+            return context3.ContentItem;
         }
 
         public virtual ContentItem Get(int id) {

src/Orchard/ContentManagement/Drivers/ContentFieldDriver.cs

@@ -1,4 +1,7 @@
-using Orchard.ContentManagement.Handlers;
+using System.Collections.Generic;
+using System.Linq;
+using Orchard.ContentManagement.Handlers;
+using Orchard.ContentManagement.MetaData;
 
 namespace Orchard.ContentManagement.Drivers {
 
@@ -6,42 +9,61 @@ namespace Orchard.ContentManagement.Drivers {
         DriverResult BuildDisplayModel(BuildDisplayModelContext context);
         DriverResult BuildEditorModel(BuildEditorModelContext context);
         DriverResult UpdateEditorModel(UpdateEditorModelContext context);
+
+        IEnumerable<ContentFieldInfo> GetFieldInfo();
     }
 
-    public abstract class ContentFieldDriver<TContent> : IContentFieldDriver where TContent : ContentField, new() {
+    public abstract class ContentFieldDriver<TField> : IContentFieldDriver where TField : ContentField, new() {
         protected virtual string Prefix { get { return ""; } }
         protected virtual string Zone { get { return "body"; } }
 
         DriverResult IContentFieldDriver.BuildDisplayModel(BuildDisplayModelContext context) {
-            var field = context.ContentItem.As<TContent>();
+            var results = context.ContentItem.Parts.SelectMany(part => part.Fields).
-            return field == null ? null : Display(field, context.DisplayType);
+                OfType<TField>().
+                Select(field => Display(field, context.DisplayType));
+            return Combined(results.ToArray());
         }
 
         DriverResult IContentFieldDriver.BuildEditorModel(BuildEditorModelContext context) {
-            var field = context.ContentItem.As<TContent>();
+            var results = context.ContentItem.Parts.SelectMany(part => part.Fields).
-            return field == null ? null : Editor(field);
+                OfType<TField>().
+                Select(field => Editor(field));
+            return Combined(results.ToArray());
         }
 
         DriverResult IContentFieldDriver.UpdateEditorModel(UpdateEditorModelContext context) {
-            var field = context.ContentItem.As<TContent>();
+            var results = context.ContentItem.Parts.SelectMany(part => part.Fields).
-            return field == null ? null : Editor(field, context.Updater);
+                OfType<TField>().
+                Select(field => Editor(field, context.Updater));
+            return Combined(results.ToArray());
         }
 
-        protected virtual DriverResult Display(TContent field, string displayType) { return null; }
+        public IEnumerable<ContentFieldInfo> GetFieldInfo() {
-        protected virtual DriverResult Editor(TContent field) { return null; }
+            var contentFieldInfo = new[] {
-        protected virtual DriverResult Editor(TContent field, IUpdateModel updater) { return null; }
+                new ContentFieldInfo {
+                    FieldTypeName = typeof (TField).Name,
+                    Factory = partFieldDefinition => new TField {PartFieldDefinition = partFieldDefinition}
+                }
+            };
 
-
+            return contentFieldInfo;
-        public ContentFieldTemplateResult ContentPartTemplate(object model) {
-            return new ContentFieldTemplateResult(model, null, Prefix).Location(Zone);
         }
 
-        public ContentFieldTemplateResult ContentPartTemplate(object model, string template) {
+        protected virtual DriverResult Display(TField field, string displayType) { return null; }
-            return new ContentFieldTemplateResult(model, template, Prefix).Location(Zone);
+        protected virtual DriverResult Editor(TField field) { return null; }
+        protected virtual DriverResult Editor(TField field, IUpdateModel updater) { return null; }
+
+
+        public ContentTemplateResult ContentPartTemplate(object model) {
+            return new ContentTemplateResult(model, null, Prefix).Location(Zone);
         }
 
-        public ContentFieldTemplateResult ContentPartTemplate(object model, string template, string prefix) {
+        public ContentTemplateResult ContentPartTemplate(object model, string template) {
-            return new ContentFieldTemplateResult(model, template, prefix).Location(Zone);
+            return new ContentTemplateResult(model, template, Prefix).Location(Zone);
+        }
+
+        public ContentTemplateResult ContentPartTemplate(object model, string template, string prefix) {
+            return new ContentTemplateResult(model, template, prefix).Location(Zone);
         }
 
         public CombinedResult Combined(params DriverResult[] results) {

src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs

@@ -36,16 +36,16 @@ namespace Orchard.ContentManagement.Drivers {
         protected virtual DriverResult Editor(TContent part, IUpdateModel updater) { return null; }
 
 
-        public ContentPartTemplateResult ContentPartTemplate(object model) {
+        public ContentTemplateResult ContentPartTemplate(object model) {
-            return new ContentPartTemplateResult(model, null, Prefix).Location(Zone);
+            return new ContentTemplateResult(model, null, Prefix).Location(Zone);
         }
 
-        public ContentPartTemplateResult ContentPartTemplate(object model, string template) {
+        public ContentTemplateResult ContentPartTemplate(object model, string template) {
-            return new ContentPartTemplateResult(model, template, Prefix).Location(Zone);
+            return new ContentTemplateResult(model, template, Prefix).Location(Zone);
         }
 
-        public ContentPartTemplateResult ContentPartTemplate(object model, string template, string prefix) {
+        public ContentTemplateResult ContentPartTemplate(object model, string template, string prefix) {
-            return new ContentPartTemplateResult(model, template, prefix).Location(Zone);
+            return new ContentTemplateResult(model, template, prefix).Location(Zone);
         }
 
         public CombinedResult Combined(params DriverResult[] results) {

src/Orchard/ContentManagement/Drivers/ContentPartTemplateResult.cs

@@ -1,56 +0,0 @@
-using System.Linq;
-using Orchard.ContentManagement.Handlers;
-
-namespace Orchard.ContentManagement.Drivers {
-    public class ContentPartTemplateResult : DriverResult {
-        public object Model { get; set; }
-        public string TemplateName { get; set; }
-        public string Prefix { get; set; }
-        public string Zone { get; set; }
-        public string Position { get; set; }
-
-        public ContentPartTemplateResult(object model, string templateName, string prefix) {
-            Model = model;
-            TemplateName = templateName;
-            Prefix = prefix;
-        }
-
-        public override void Apply(BuildDisplayModelContext context) {
-            context.ViewModel.Zones.AddDisplayPart(
-                Zone + ":" + Position, Model, TemplateName, Prefix);
-        }
-
-        public override void Apply(BuildEditorModelContext context) {
-            context.ViewModel.Zones.AddEditorPart(
-                Zone + ":" + Position, Model, TemplateName, Prefix);
-        }
-
-        public ContentPartTemplateResult Location(string zone) {
-            Zone = zone;
-            return this;
-        }
-
-        public ContentPartTemplateResult Location(string zone, string position) {
-            Zone = zone;
-            Position = position;
-            return this;
-        }
-
-        public ContentPartTemplateResult LongestMatch(string displayType, params string[] knownDisplayTypes) {
-
-            if (string.IsNullOrEmpty(displayType))
-                return this;
-
-            var longest = knownDisplayTypes.Aggregate("", (best, x) => {
-                if (displayType.StartsWith(x) && x.Length > best.Length) return x;
-                return best;
-            });
-
-            if (string.IsNullOrEmpty(longest))
-                return this;
-
-            TemplateName += "." + longest;
-            return this;
-        }
-    }
-}

src/Orchard/ContentManagement/Drivers/ContentTemplateResult.cs

@@ -2,14 +2,14 @@
 using Orchard.ContentManagement.Handlers;
 
 namespace Orchard.ContentManagement.Drivers {
-    public class ContentFieldTemplateResult : DriverResult {
+    public class ContentTemplateResult : DriverResult {
         public object Model { get; set; }
         public string TemplateName { get; set; }
         public string Prefix { get; set; }
         public string Zone { get; set; }
         public string Position { get; set; }
 
-        public ContentFieldTemplateResult(object model, string templateName, string prefix) {
+        public ContentTemplateResult(object model, string templateName, string prefix) {
             Model = model;
             TemplateName = templateName;
             Prefix = prefix;
@@ -25,18 +25,18 @@ namespace Orchard.ContentManagement.Drivers {
                 Zone + ":" + Position, Model, TemplateName, Prefix);
         }
 
-        public ContentFieldTemplateResult Location(string zone) {
+        public ContentTemplateResult Location(string zone) {
             Zone = zone;
             return this;
         }
 
-        public ContentFieldTemplateResult Location(string zone, string position) {
+        public ContentTemplateResult Location(string zone, string position) {
             Zone = zone;
             Position = position;
             return this;
         }
 
-        public ContentFieldTemplateResult LongestMatch(string displayType, params string[] knownDisplayTypes) {
+        public ContentTemplateResult LongestMatch(string displayType, params string[] knownDisplayTypes) {
 
             if (string.IsNullOrEmpty(displayType))
                 return this;

src/Orchard/ContentManagement/Handlers/ContentFieldHandler.cs

@@ -0,0 +1,26 @@
+using System.Collections.Generic;
+using System.Linq;
+using Orchard.ContentManagement.Drivers;
+
+namespace Orchard.ContentManagement.Handlers {
+    public class ContentFieldHandler: ContentHandlerBase {
+        private readonly IEnumerable<IContentFieldDriver> _contentFieldDrivers;
+
+        public ContentFieldHandler(IEnumerable<IContentFieldDriver> contentFieldDrivers) {
+            _contentFieldDrivers = contentFieldDrivers;
+        }
+
+        public override void Activated(ActivatedContentContext context) {
+            var fieldInfos = _contentFieldDrivers.SelectMany(x => x.GetFieldInfo());
+            var parts = context.ContentItem.Parts;
+            foreach (var contentPart in parts) {
+                foreach (var field in contentPart.Fields) {
+                    var fieldTypeName = field.FieldDefinition.Name;
+                    var fieldInfo = fieldInfos.FirstOrDefault(x => x.FieldTypeName == fieldTypeName);
+                    if (fieldInfo != null) 
+                        contentPart.Weld(fieldInfo.Factory(field.PartFieldDefinition));
+                }
+            }
+        }
+    }
+}

src/Orchard/ContentManagement/Handlers/ContentHandler.cs

@@ -17,6 +17,10 @@ namespace Orchard.ContentManagement.Handlers {
             Filters.Add(new InlineStorageFilter<TPart> { OnActivated = handler });
         }
 
+        protected void OnInitializing<TPart>(Action<InitializingContentContext, TPart> handler) where TPart : class, IContent {
+            Filters.Add(new InlineStorageFilter<TPart> { OnInitializing = handler });
+        }
+
         protected void OnCreating<TPart>(Action<CreateContentContext, TPart> handler) where TPart : class, IContent {
             Filters.Add(new InlineStorageFilter<TPart> { OnCreating = handler });
         }
@@ -90,6 +94,7 @@ namespace Orchard.ContentManagement.Handlers {
 
         class InlineStorageFilter<TPart> : StorageFilterBase<TPart> where TPart : class, IContent {
             public Action<ActivatedContentContext, TPart> OnActivated { get; set; }
+            public Action<InitializingContentContext, TPart> OnInitializing { get; set; }
             public Action<CreateContentContext, TPart> OnCreating { get; set; }
             public Action<CreateContentContext, TPart> OnCreated { get; set; }
             public Action<SaveContentContext, TPart> OnSaving { get; set; }
@@ -107,6 +112,9 @@ namespace Orchard.ContentManagement.Handlers {
             protected override void Activated(ActivatedContentContext context, TPart instance) {
                 if (OnActivated != null) OnActivated(context, instance);
             }
+            protected override void Initializing(InitializingContentContext context, TPart instance) {
+                if (OnInitializing != null) OnInitializing(context, instance);
+            }
             protected override void Creating(CreateContentContext context, TPart instance) {
                 if (OnCreating != null) OnCreating(context, instance);
             }
@@ -189,6 +197,12 @@ namespace Orchard.ContentManagement.Handlers {
             Activated(context);
         }
 
+        void IContentHandler.Initializing(InitializingContentContext context) {
+            foreach (var filter in Filters.OfType<IContentStorageFilter>())
+                filter.Initializing(context);
+            Initializing(context);
+        }
+
         void IContentHandler.Creating(CreateContentContext context) {
             foreach (var filter in Filters.OfType<IContentStorageFilter>())
                 filter.Creating(context);
@@ -297,6 +311,8 @@ namespace Orchard.ContentManagement.Handlers {
         protected virtual void Activating(ActivatingContentContext context) { }
         protected virtual void Activated(ActivatedContentContext context) { }
 
+        protected virtual void Initializing(InitializingContentContext context) { }
+
         protected virtual void Creating(CreateContentContext context) { }
         protected virtual void Created(CreateContentContext context) { }
 

src/Orchard/ContentManagement/Handlers/ContentHandlerBase.cs

@@ -13,6 +13,9 @@ namespace Orchard.ContentManagement.Handlers {
         public virtual void Activated(ActivatedContentContext context) {
         }
 
+        public virtual void Initializing(InitializingContentContext context) {
+        }
+
         public virtual void Creating(CreateContentContext context) {
         }
 

src/Orchard/ContentManagement/Handlers/IContentHandler.cs

@@ -6,6 +6,7 @@ namespace Orchard.ContentManagement.Handlers {
 
         void Activating(ActivatingContentContext context);
         void Activated(ActivatedContentContext context);
+        void Initializing(InitializingContentContext context);
         void Creating(CreateContentContext context);
         void Created(CreateContentContext context);
         void Saving(SaveContentContext context);

src/Orchard/ContentManagement/Handlers/IContentStorageFilter.cs

@@ -1,6 +1,7 @@
 namespace Orchard.ContentManagement.Handlers {
     public interface IContentStorageFilter : IContentFilter {
         void Activated(ActivatedContentContext context);
+        void Initializing(InitializingContentContext context);
         void Creating(CreateContentContext context);
         void Created(CreateContentContext context);
         void Saving(SaveContentContext context);

src/Orchard/ContentManagement/Handlers/InitializingContentContext.cs

@@ -0,0 +1,6 @@
+namespace Orchard.ContentManagement.Handlers {
+    public class InitializingContentContext {
+        public string ContentType { get; set; }
+        public ContentItem ContentItem { get; set; }
+    }
+}

src/Orchard/ContentManagement/Handlers/StorageFilterBase.cs

@@ -2,6 +2,7 @@ namespace Orchard.ContentManagement.Handlers {
     public abstract class StorageFilterBase<TPart> : IContentStorageFilter where TPart : class, IContent {
 
         protected virtual void Activated(ActivatedContentContext context, TPart instance) { }
+        protected virtual void Initializing(InitializingContentContext context, TPart instance) { }
         protected virtual void Creating(CreateContentContext context, TPart instance) { }
         protected virtual void Created(CreateContentContext context, TPart instance) { }
         protected virtual void Saving(SaveContentContext context, TPart instance) { }
@@ -23,6 +24,11 @@ namespace Orchard.ContentManagement.Handlers {
                 Activated(context, context.ContentItem.As<TPart>());
         }
 
+        void IContentStorageFilter.Initializing(InitializingContentContext context) {
+            if (context.ContentItem.Is<TPart>())
+                Initializing(context, context.ContentItem.As<TPart>());
+        }
+
         void IContentStorageFilter.Creating(CreateContentContext context) {
             if (context.ContentItem.Is<TPart>())
                 Creating(context, context.ContentItem.As<TPart>());

src/Orchard/ContentManagement/MetaData/ContentFieldInfo.cs

@@ -0,0 +1,9 @@
+using System;
+using Orchard.ContentManagement.MetaData.Models;
+
+namespace Orchard.ContentManagement.MetaData {
+    public class ContentFieldInfo {
+        public string FieldTypeName { get; set; }
+        public Func<ContentPartDefinition.Field, ContentField> Factory { get; set; }
+    }
+}

src/Orchard/Orchard.Framework.csproj

@@ -173,7 +173,6 @@
     </Compile>
     <Compile Include="ContentManagement\Drivers\ContentFieldDriver.cs" />
     <Compile Include="ContentManagement\Drivers\ContentFieldDriverHandler.cs" />
-    <Compile Include="ContentManagement\Drivers\ContentFieldTemplateResult.cs" />
     <Compile Include="ContentManagement\Drivers\ContentItemDriver.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -189,9 +188,7 @@
     <Compile Include="ContentManagement\Drivers\ContentPartDriverHandler.cs">
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="ContentManagement\Drivers\ContentPartTemplateResult.cs">
+    <Compile Include="ContentManagement\Drivers\ContentTemplateResult.cs" />
-      <SubType>Code</SubType>
-    </Compile>
     <Compile Include="ContentManagement\Drivers\DriverResult.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -219,6 +216,7 @@
     <Compile Include="ContentManagement\Handlers\ContentContextBase.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ContentManagement\Handlers\ContentFieldHandler.cs" />
     <Compile Include="ContentManagement\Handlers\ContentHandler.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -250,6 +248,7 @@
     <Compile Include="ContentManagement\Handlers\IContentTemplateFilter.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ContentManagement\Handlers\InitializingContentContext.cs" />
     <Compile Include="ContentManagement\Handlers\LoadContentContext.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -298,6 +297,7 @@
     </Compile>
     <Compile Include="ContentManagement\MetaData\Builders\ContentPartDefinitionBuilder.cs" />
     <Compile Include="ContentManagement\MetaData\Builders\ContentTypeDefinitionBuilder.cs" />
+    <Compile Include="ContentManagement\MetaData\ContentFieldInfo.cs" />
     <Compile Include="ContentManagement\MetaData\ContentPartHandler.cs">
       <SubType>Code</SubType>
     </Compile>