Making the ShapeDescriptor.Bindings multiply occuring information

The same descriptor has all variants registered in the bindings collection
The descriptor is registered in the table under each of those names

--HG--
branch : theming

src/Orchard.Tests/DisplayManagement/DefaultDisplayManagerTests.cs

@@ -2,11 +2,183 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Web;
+using System.Web.Mvc;
+using Autofac;
 using NUnit.Framework;
+using Orchard.DisplayManagement.Descriptors;
+using Orchard.DisplayManagement.Implementation;
+using Orchard.DisplayManagement.Shapes;
+using Orchard.Themes;
 
 namespace Orchard.Tests.DisplayManagement {
-   [TestFixture]
-    public class DefaultDisplayManagerTests {
-      
+    [TestFixture]
+    public class DefaultDisplayManagerTests : ContainerTestBase {
+        ShapeTable _defaultShapeTable;
+        WorkContext _workContext;
+
+        protected override void Register(Autofac.ContainerBuilder builder) {
+            _defaultShapeTable = new ShapeTable { Descriptors = new Dictionary<string, ShapeDescriptor>() };
+            _workContext = new TestWorkContext {
+                CurrentTheme = new Theme { ThemeName = "Hello" }
+            };
+
+
+            builder.RegisterType<DefaultDisplayManager>().As<IDisplayManager>();
+            builder.RegisterType<TestShapeTableManager>().As<IShapeTableManager>();
+            builder.RegisterType<TestWorkContextAccessor>().As<IWorkContextAccessor>();
+            builder.Register(ctx => _defaultShapeTable);
+            builder.Register(ctx => _workContext);
+        }
+
+        public class Theme : ITheme {
+            public string ThemeName { get; set; }
+            public string DisplayName { get; set; }
+            public string Description { get; set; }
+            public string Version { get; set; }
+            public string Author { get; set; }
+            public string HomePage { get; set; }
+            public string Tags { get; set; }
+        }
+
+
+        public class TestShapeTableManager : IShapeTableManager {
+            private readonly ShapeTable _defaultShapeTable;
+
+            public TestShapeTableManager(ShapeTable defaultShapeTable) {
+                _defaultShapeTable = defaultShapeTable;
+            }
+
+            public ShapeTable GetShapeTable(string themeName) {
+                return _defaultShapeTable;
+            }
+        }
+
+        public class TestWorkContextAccessor : IWorkContextAccessor {
+            private readonly WorkContext _workContext;
+            public TestWorkContextAccessor(WorkContext workContext) {
+                _workContext = workContext;
+            }
+
+            public WorkContext GetContext(HttpContextBase httpContext) {
+                return _workContext;
+            }
+
+            public IWorkContextScope CreateWorkContextScope(HttpContextBase httpContext) {
+                throw new NotImplementedException();
+            }
+
+            public WorkContext GetContext() {
+                return _workContext;
+            }
+
+            public IWorkContextScope CreateWorkContextScope() {
+                throw new NotImplementedException();
+            }
+        }
+
+        public class TestWorkContext : WorkContext {
+            readonly IDictionary<string, object> _state = new Dictionary<string, object>();
+
+            public override T Resolve<T>() {
+                throw new NotImplementedException();
+            }
+
+            public override T GetState<T>(string name) {
+                object value;
+                return _state.TryGetValue(name, out value) ? (T)value : default(T);
+            }
+
+            public override void SetState<T>(string name, T value) {
+                _state[name] = value;
+            }
+        }
+
+        void AddShapeDescriptor(ShapeDescriptor shapeDescriptor) {
+            foreach (var binding in shapeDescriptor.Bindings) {
+                _defaultShapeTable.Descriptors[binding.Key] = shapeDescriptor;
+            }
+        }
+
+        static DisplayContext CreateDisplayContext(Shape shape) {
+            return new DisplayContext {
+                Value = shape,
+                ViewContext = new ViewContext()
+            };
+        }
+
+        [Test]
+        public void RenderSimpleShape() {
+            var displayManager = _container.Resolve<IDisplayManager>();
+
+            var shape = new Shape {
+                Metadata = new ShapeMetadata {
+                    Type = "Foo"
+                }
+            };
+
+            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("Hi there!"));
+        }
+
+        [Test]
+        public void RenderFallbackShape() {
+            var displayManager = _container.Resolve<IDisplayManager>();
+
+            var shape = new Shape {
+                Metadata = new ShapeMetadata {
+                    Type = "Foo__2"
+                }
+            };
+
+            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("Hi there!"));
+        }
+
+
+        [Test]
+        public void RenderAlternateShape() {
+            var displayManager = _container.Resolve<IDisplayManager>();
+
+            var shape = new Shape {
+                Metadata = new ShapeMetadata {
+                    Type = "Foo__2"
+                }
+            };
+
+            var descriptor = new ShapeDescriptor {
+                ShapeType = "Foo",
+            };
+            descriptor.Bindings["Foo"] = new ShapeBinding {
+                BindingName = "Foo",
+                Binding = ctx => new HtmlString("Hi there!"),
+            };
+            descriptor.Bindings["Foo__2"] = new ShapeBinding {
+                BindingName = "Foo__2",
+                Binding = ctx => new HtmlString("Hello again!"),
+            };
+            AddShapeDescriptor(descriptor);
+
+            var result = displayManager.Execute(CreateDisplayContext(shape));
+            Assert.That(result.ToString(), Is.EqualTo("Hello again!"));
+        }
     }
 }

src/Orchard/DisplayManagement/Descriptors/ShapeAlterationBuilder.cs

@@ -32,18 +32,21 @@ namespace Orchard.DisplayManagement.Descriptors {
 
                 Func<DisplayContext, IHtmlString> target = null;
 
-                descriptor.BindingSource = bindingSource;
+                var binding = new ShapeBinding {
+                    BindingName = _shapeType,
+                    BindingSource = bindingSource,
+                    Binding = displayContext => {
 
-                // announce the binding, which may be reconfigured before it's used
-                descriptor.Binding = displayContext => {
+                        // when used, first realize the actual target once
+                        if (target == null)
+                            target = binder(descriptor);
 
-                    // when used, first realize the actual target once
-                    if (target == null)
-                        target = binder(descriptor);
-
-                    // and execute the re
-                    return target(displayContext);
+                        // and execute the re
+                        return target(displayContext);
+                    }
                 };
+                descriptor.Bindings[_shapeType] = binding;
+
             });
         }
 
@@ -61,9 +64,8 @@ namespace Orchard.DisplayManagement.Descriptors {
             });
         }
 
-        
-            public ShapeAlteration Build() {
-                return new ShapeAlteration(_shapeType, _feature, _configurations.ToArray());
-            }
+        public ShapeAlteration Build() {
+            return new ShapeAlteration(_shapeType, _feature, _configurations.ToArray());
+        }
     }
 }

src/Orchard/DisplayManagement/Descriptors/ShapeDescriptor.cs

@@ -10,21 +10,38 @@ namespace Orchard.DisplayManagement.Descriptors {
             Creating = Enumerable.Empty<Action<ShapeCreatingContext>>();
             Created = Enumerable.Empty<Action<ShapeCreatedContext>>();
             Wrappers = new List<string>();
+            Bindings = new Dictionary<string, ShapeBinding>();
         }
 
         public string ShapeType { get; set; }
-        
+
         /// <summary>
         /// The BindingSource is informational text about the source of the Binding delegate. Not used except for 
         /// troubleshooting.
         /// </summary>
-        public string BindingSource { get; set; }
+        public string BindingSource {
+            get {
+                return Bindings[ShapeType].BindingSource;
+            }
+        }
 
-        public Func<DisplayContext, IHtmlString> Binding { get; set; }
+        public Func<DisplayContext, IHtmlString> Binding {
+            get {
+                return Bindings[ShapeType].Binding;
+            }
+        }
 
-        public IEnumerable<Action<ShapeCreatingContext>> Creating {get;set;}
-        public IEnumerable<Action<ShapeCreatedContext>> Created {get;set;}
+        public IDictionary<string, ShapeBinding> Bindings { get; set; }
+
+        public IEnumerable<Action<ShapeCreatingContext>> Creating { get; set; }
+        public IEnumerable<Action<ShapeCreatedContext>> Created { get; set; }
 
         public IList<string> Wrappers { get; set; }
     }
+
+    public class ShapeBinding {
+        public string BindingName { get; set; }
+        public string BindingSource { get; set; }
+        public Func<DisplayContext, IHtmlString> Binding { get; set; }
+    }
 }

src/Orchard/DisplayManagement/Implementation/DefaultDisplayManager.cs

@@ -49,9 +49,11 @@ namespace Orchard.DisplayManagement.Implementation {
             var shapeTable = _shapeTableManager.GetShapeTable(workContext.CurrentTheme.ThemeName);
             //preproc loop / event (alter shape, swapping type)
 
+
             ShapeDescriptor shapeDescriptor;
-            if (shapeTable.Descriptors.TryGetValue(shapeMetadata.Type, out shapeDescriptor)) {
-                shape.Metadata.ChildContent = Process(shapeDescriptor, shape, context);
+            ShapeBinding shapeBinding;
+            if (TryGetDescriptor(shapeMetadata.Type, shapeTable, out shapeDescriptor, out shapeBinding)) {
+                shape.Metadata.ChildContent = Process(shapeDescriptor, shapeBinding, shape, context);
             }
             else {
                 throw new OrchardException(T("Shape type {0} not found", shapeMetadata.Type));
@@ -59,15 +61,35 @@ namespace Orchard.DisplayManagement.Implementation {
 
             foreach (var frameType in shape.Metadata.Wrappers) {
                 ShapeDescriptor frameDescriptor;
-                if (shapeTable.Descriptors.TryGetValue(frameType, out frameDescriptor)) {
-                    shape.Metadata.ChildContent = Process(frameDescriptor, shape, context);
+                ShapeBinding frameBinding;
+                if (TryGetDescriptor(frameType, shapeTable, out frameDescriptor, out frameBinding)) {
+                    shape.Metadata.ChildContent = Process(frameDescriptor, frameBinding, shape, context);
                 }
             }
 
             return shape.Metadata.ChildContent;
         }
 
-        private IHtmlString CoerceHtmlString(object value) {
+        static bool TryGetDescriptor(string shapeType, ShapeTable shapeTable, out ShapeDescriptor shapeDescriptor, out ShapeBinding shapeBinding) {
+
+            var shapeTypeScan = shapeType;
+            for (; ; ) {
+                if (shapeTable.Descriptors.TryGetValue(shapeTypeScan, out shapeDescriptor) &&
+                    shapeDescriptor.Bindings.TryGetValue(shapeTypeScan, out shapeBinding)) {
+                    return true;
+                }
+
+                var delimiterIndex = shapeTypeScan.LastIndexOf("__");
+                if (delimiterIndex < 0) {
+                    shapeBinding = null;
+                    return false;
+                }
+
+                shapeTypeScan = shapeTypeScan.Substring(0, delimiterIndex);
+            }
+        }
+
+        static IHtmlString CoerceHtmlString(object value) {
             if (value == null)
                 return null;
 
@@ -78,12 +100,13 @@ namespace Orchard.DisplayManagement.Implementation {
             return new HtmlString(HttpUtility.HtmlEncode(value));
         }
 
-        private IHtmlString Process(ShapeDescriptor shapeDescriptor, IShape shape, DisplayContext context) {
-            if (shapeDescriptor == null || shapeDescriptor.Binding == null) {
+        static IHtmlString Process(ShapeDescriptor shapeDescriptor, ShapeBinding shapeBinding, IShape shape, DisplayContext context) {
+
+            if (shapeDescriptor == null || shapeBinding == null || shapeBinding.Binding == null) {
                 //todo: create result from all child shapes
                 return shape.Metadata.ChildContent ?? new HtmlString("");
             }
-            return CoerceHtmlString(shapeDescriptor.Binding(context));
+            return CoerceHtmlString(shapeBinding.Binding(context));
         }
 
         class ForgivingConvertBinder : ConvertBinder {