Fix xml completion for SubstitutionGroup elements.

src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlSchemaCompletion.cs

@@ -335,11 +335,23 @@ namespace ICSharpCode.XmlEditor
 		{
 			XmlSchemaComplexType complexType = element.SchemaType as XmlSchemaComplexType;
 			if (complexType == null) {
-				complexType = FindNamedType(schema, element.SchemaTypeName);
+				if (element.SchemaTypeName.IsEmpty) {
+					return GetComplexTypeFromSubstitutionGroup(element);
+				}
+				return FindNamedType(schema, element.SchemaTypeName);
 			}
 			return complexType;
 		}
 		
+		XmlSchemaComplexType GetComplexTypeFromSubstitutionGroup(XmlSchemaElement element)
+		{
+			if (!element.SubstitutionGroup.IsEmpty) {
+				XmlSchemaElement substitutedElement = FindElement(element.SubstitutionGroup);
+				return GetElementAsComplexType(substitutedElement);
+			}
+			return null;
+		}
+		
 		/// <summary>
 		/// Handler for schema validation errors.
 		/// </summary>

src/AddIns/DisplayBindings/XmlEditor/Test/Schema/XsltSchemaTests.cs

@@ -0,0 +1,48 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using ICSharpCode.XmlEditor;
+using NUnit.Framework;
+using XmlEditor.Tests.Utils;
+
+namespace XmlEditor.Tests.Schema
+{
+	[TestFixture]
+	public class XsltSchemaTests
+	{
+		string namespaceURI = "http://www.w3.org/1999/XSL/Transform";
+		XmlSchemaCompletion schemaCompletion;
+		
+		[TestFixtureSetUp]
+		public void SetUp()
+		{
+			schemaCompletion = new XmlSchemaCompletion(ResourceManager.ReadXsltSchema());
+		}
+		
+		[Test]
+		public void GetChildElementCompletion_StylesheetElement_SubstitutionGroupUsedForTemplateAndTemplateElementReturned()
+		{
+			var path = new XmlElementPath();
+			path.AddElement(new QualifiedName("stylesheet", namespaceURI));
+			
+			XmlCompletionItemCollection completionItems = schemaCompletion.GetChildElementCompletion(path);
+			bool contains = completionItems.Contains("template");
+			
+			Assert.IsTrue(contains);
+		}
+		
+		[Test]
+		public void GetAttributeCompletion_TemplateElementIsChildOfStylesheetElement_SubstitutionGroupUsedForTemplateAndMatchAttributeReturned()
+		{
+			var path = new XmlElementPath();
+			path.AddElement(new QualifiedName("stylesheet", namespaceURI));
+			path.AddElement(new QualifiedName("template", namespaceURI));
+			
+			XmlCompletionItemCollection completionItems = schemaCompletion.GetAttributeCompletion(path);
+			bool contains = completionItems.Contains("match");
+			
+			Assert.IsTrue(contains);
+		}
+	}
+}

src/AddIns/DisplayBindings/XmlEditor/Test/Utils/ResourceManager.cs

@@ -35,6 +35,14 @@ namespace XmlEditor.Tests.Utils
 			return manager.ReadXml("XMLSchema.xsd");
 		}
 		
+		/// <summary>
+		/// Reads the XSL Transforms schema.
+		/// </summary>
+		public static StreamReader ReadXsltSchema()
+		{
+			return manager.ReadXml("xslt.xsd");
+		}
+		
 		/// <summary>
 		/// Returns the xml read from the specified file which is embedded
 		/// in this assembly as a resource.

src/AddIns/DisplayBindings/XmlEditor/Test/XmlEditor.Tests.csproj

@@ -168,6 +168,7 @@
     <Compile Include="Schema\SingleElementSchemaTestFixture.cs" />
     <Compile Include="Schema\ElementWithAttributeSchemaTestFixture.cs" />
     <Compile Include="Schema\NestedElementSchemaTestFixture.cs" />
+    <Compile Include="Schema\XsltSchemaTests.cs" />
     <Compile Include="Schema\TwoElementSchemaTestFixture.cs" />
     <Compile Include="Schema\ReferencedElementsTestFixture.cs" />
     <Compile Include="Schema\NamespaceCompletionTestFixture.cs" />
@@ -386,5 +387,8 @@
     <Folder Include="FindSchemaObject" />
     <Folder Include="Tree" />
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Resources\xslt.xsd" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
 </Project>

src/AddIns/DisplayBindings/XmlEditor/XmlEditor.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 11.00
 # Visual Studio 2010
-# SharpDevelop 4.1.0.7289-alpha
+# SharpDevelop 4.3
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XmlEditor", "Project\XmlEditor.csproj", "{DCA2703D-250A-463E-A68A-07ED105AE6BD}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XmlEditor.Tests", "Test\XmlEditor.Tests.csproj", "{FC0FE702-A87D-4D70-A9B6-1ECCD611125F}"