Refactor T4 templating host.

src/AddIns/Misc/TextTemplating/Project/Src/TextTemplatingCustomTool.cs

@@ -18,8 +18,8 @@ protected TextTemplatingHost CreateTextTemplatingHost(IProject project)
 			var assemblyResolver = new TextTemplatingAssemblyResolver(project);
 			var textTemplatingVariables = new TextTemplatingVariables();
 			var serviceProvider = new TextTemplatingServiceProvider();
-			var host = new TextTemplatingHost(appDomainFactory, assemblyResolver, textTemplatingVariables, serviceProvider, applicationBase);
-			return host;
+			var context = new TextTemplatingHostContext(project);
+			return new TextTemplatingHost(context, applicationBase);
 		}
 
 		string GetAssemblyBaseLocation()

src/AddIns/Misc/TextTemplating/Project/Src/TextTemplatingHost.cs

@@ -8,24 +8,13 @@ namespace ICSharpCode.TextTemplating
 {
 	public class TextTemplatingHost : TemplateGenerator, ITextTemplatingHost, IServiceProvider
 	{
-		ITextTemplatingAppDomainFactory appDomainFactory;
 		ITextTemplatingAppDomain templatingAppDomain;
-		ITextTemplatingAssemblyResolver assemblyResolver;
-		ITextTemplatingVariables templatingVariables;
-		IServiceProvider serviceProvider;
+		TextTemplatingHostContext context;
 		string applicationBase;
 
-		public TextTemplatingHost(
-			ITextTemplatingAppDomainFactory appDomainFactory,
-			ITextTemplatingAssemblyResolver assemblyResolver,
-			ITextTemplatingVariables templatingVariables,
-			IServiceProvider serviceProvider,
-			string applicationBase)
+		public TextTemplatingHost(TextTemplatingHostContext context, string applicationBase)
 		{
-			this.appDomainFactory = appDomainFactory;
-			this.assemblyResolver = assemblyResolver;
-			this.templatingVariables = templatingVariables;
-			this.serviceProvider = serviceProvider;
+			this.context = context;
 			this.applicationBase = applicationBase;
 		}
 
@@ -47,12 +36,12 @@ public override AppDomain ProvideTemplatingAppDomain(string content)
 
 		void CreateAppDomain()
 		{
-			templatingAppDomain = appDomainFactory.CreateTextTemplatingAppDomain(applicationBase);
+			templatingAppDomain = context.CreateTextTemplatingAppDomain(applicationBase);
 		}
 
 		protected override string ResolveAssemblyReference(string assemblyReference)
 		{
-			return assemblyResolver.Resolve(assemblyReference);
+			return context.ResolveAssemblyReference(assemblyReference);
 		}
 
 		protected override string ResolvePath(string path)
@@ -63,12 +52,12 @@ protected override string ResolvePath(string path)
 
 		string ExpandPath(string path)
 		{
-			return templatingVariables.ExpandVariables(path);
+			return context.ExpandTemplateVariables(path);
 		}
 
 		object IServiceProvider.GetService(Type serviceType)
 		{
-			return serviceProvider.GetService(serviceType);
+			return context.GetService(serviceType);
 		}
 	}
 }

src/AddIns/Misc/TextTemplating/Project/Src/TextTemplatingHostContext.cs

@@ -0,0 +1,57 @@
+// 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.SharpDevelop.Project;
+
+namespace ICSharpCode.TextTemplating
+{
+	public class TextTemplatingHostContext
+	{
+		ITextTemplatingAppDomainFactory appDomainFactory;
+		ITextTemplatingAssemblyResolver assemblyResolver;
+		ITextTemplatingVariables templatingVariables;
+		IServiceProvider serviceProvider;
+
+		public TextTemplatingHostContext(IProject project)
+			: this(
+				new TextTemplatingAppDomainFactory(),
+				new TextTemplatingAssemblyResolver(project),
+				new TextTemplatingVariables(),
+				new TextTemplatingServiceProvider())
+		{
+		}
+
+		public TextTemplatingHostContext(
+			ITextTemplatingAppDomainFactory appDomainFactory,
+			ITextTemplatingAssemblyResolver assemblyResolver,
+			ITextTemplatingVariables templatingVariables,
+			IServiceProvider serviceProvider)
+		{
+			this.appDomainFactory = appDomainFactory;
+			this.assemblyResolver = assemblyResolver;
+			this.templatingVariables = templatingVariables;
+			this.serviceProvider = serviceProvider;
+		}
+
+		public object GetService(Type serviceType)
+		{
+			return serviceProvider.GetService(serviceType);
+		}
+
+		public string ExpandTemplateVariables(string name)
+		{
+			return templatingVariables.ExpandVariables(name);
+		}
+
+		public ITextTemplatingAppDomain CreateTextTemplatingAppDomain(string applicationBase)
+		{
+			return appDomainFactory.CreateTextTemplatingAppDomain(applicationBase);
+		}
+
+		public string ResolveAssemblyReference(string assemblyReference)
+		{
+			return assemblyResolver.Resolve(assemblyReference);
+		}
+	}
+}

src/AddIns/Misc/TextTemplating/Project/TextTemplating.csproj

@@ -81,6 +81,7 @@
     <Compile Include="Src\TextTemplatingFilePreprocessorCustomTool.cs" />
     <Compile Include="Src\TextTemplatingFileProcessor.cs" />
     <Compile Include="Src\TextTemplatingHost.cs" />
+    <Compile Include="Src\TextTemplatingHostContext.cs" />
     <Compile Include="Src\TextTemplatingPathResolver.cs" />
     <Compile Include="Src\TextTemplatingReflectionProjectContent.cs" />
     <Compile Include="Src\TextTemplatingServiceProvider.cs" />

src/AddIns/Misc/TextTemplating/Test/Helpers/TestableTextTemplatingHost.cs

@@ -12,6 +12,7 @@ public class TestableTextTemplatingHost : TextTemplatingHost
 		public FakeTextTemplatingAssemblyResolver FakeTextTemplatingAssemblyResolver;
 		public FakeTextTemplatingVariables FakeTextTemplatingVariables;
 		public FakeServiceProvider FakeServiceProvider;
+		public TextTemplatingHostContext HostContext;
 
 		public TestableTextTemplatingHost(string applicationBase)
 			: this(
@@ -29,13 +30,20 @@ public TestableTextTemplatingHost(
 			FakeTextTemplatingVariables textTemplatingVariables,
 			FakeServiceProvider fakeServiceProvider,
 			string applicationBase)
-			: base(appDomainFactory, assemblyResolver, textTemplatingVariables, fakeServiceProvider, applicationBase)
+			: this(
+				new TextTemplatingHostContext(appDomainFactory, assemblyResolver, textTemplatingVariables, fakeServiceProvider),
+				applicationBase)
 		{
 			FakeTextTemplatingAppDomainFactory = appDomainFactory;
 			FakeTextTemplatingAssemblyResolver = assemblyResolver;
 			FakeTextTemplatingVariables = textTemplatingVariables;
 			FakeServiceProvider = fakeServiceProvider;
 		}
+
+		public TestableTextTemplatingHost(TextTemplatingHostContext context, string applicationBase)
+			: base(context, applicationBase)
+		{
+		}
 
 		public string CallResolveAssemblyReference(string assemblyReference)
 		{