Make the t4 template's CustomToolNamespace available in CallContext with the tag "NamespaceHint".

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

@@ -15,5 +15,7 @@ namespace ICSharpCode.TextTemplating
 		void AddTask(Task task);
 		void BringErrorsPadToFront();
 		void DebugLog(string message, Exception ex);
+		
+		void SetLogicalCallContextData(string name, object data);
 	}
 }

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

@@ -0,0 +1,43 @@
+// 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 NamespaceHint
+	{
+		string hint = String.Empty;
+		FileProjectItem templateFile;
+		
+		public NamespaceHint(FileProjectItem templateFile)
+		{
+			this.templateFile = templateFile;
+			GetNamespaceHint();
+		}
+		
+		void GetNamespaceHint()
+		{
+			hint = GetCustomToolNamespace();
+			if (String.IsNullOrEmpty(hint)) {
+				hint = GetProjectRootNamespace();
+			}
+		}
+		
+		string GetProjectRootNamespace()
+		{
+			return templateFile.Project.RootNamespace;
+		}
+
+		string GetCustomToolNamespace()
+		{
+			return templateFile.GetEvaluatedMetadata("CustomToolNamespace");
+		}
+		
+		public override string ToString()
+		{
+			return hint;
+		}
+	}
+}

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

@@ -2,6 +2,7 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Runtime.Remoting.Messaging;
 using ICSharpCode.Core;
 using ICSharpCode.SharpDevelop;
 using ICSharpCode.SharpDevelop.Gui;
@@ -42,5 +43,10 @@ namespace ICSharpCode.TextTemplating
 		{
 			LoggingService.DebugFormatted("{0}\r\n{1}", message, ex.ToString());
 		}
+		
+		public void SetLogicalCallContextData(string name, object data)
+		{
+			CallContext.LogicalSetData(name, data);
+		}
 	}
 }

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

@@ -13,7 +13,7 @@ namespace ICSharpCode.TextTemplating
 	public class TextTemplatingFileGenerator : ITextTemplatingFileGenerator
 	{
 		ITextTemplatingHost host;
-		FileProjectItem projectFile;
+		FileProjectItem templateFile;
 		ITextTemplatingCustomToolContext context;
 		
 		public TextTemplatingFileGenerator(
@@ -22,7 +22,7 @@ namespace ICSharpCode.TextTemplating
 			ITextTemplatingCustomToolContext context)
 		{
 			this.host = host;
-			this.projectFile = projectFile;
+			this.templateFile = projectFile;
 			this.context = context;
 		}
 		
@@ -34,6 +34,7 @@ namespace ICSharpCode.TextTemplating
 		public void ProcessTemplate()
 		{
 			context.ClearTasksExceptCommentTasks();
+			SetLogicalCallContextData();
 			if (TryGenerateOutputFileForTemplate()) {
 				AddOutputFileToProjectIfRequired();
 			}
@@ -41,16 +42,15 @@ namespace ICSharpCode.TextTemplating
 			BringErrorsToFrontIfRequired();
 		}
 		
-		void BringErrorsToFrontIfRequired()
+		void SetLogicalCallContextData()
 		{
-			if (host.Errors.HasErrors) { 
-				context.BringErrorsPadToFront();
-			}
+			var namespaceHint = new NamespaceHint(templateFile);
+			context.SetLogicalCallContextData("NamespaceHint", namespaceHint.ToString());
 		}
 
 		bool TryGenerateOutputFileForTemplate()
 		{
-			string inputFileName = projectFile.FileName;
+			string inputFileName = templateFile.FileName;
 			string outputFileName = GetOutputFileName(inputFileName);
 			return TryProcessingTemplate(inputFileName, outputFileName);
 		}
@@ -71,6 +71,13 @@ namespace ICSharpCode.TextTemplating
 			return false;
 		}
 		
+		void BringErrorsToFrontIfRequired()
+		{
+			if (host.Errors.HasErrors) { 
+				context.BringErrorsPadToFront();
+			}
+		}
+		
 		void AddCompilerErrorToTemplatingHost(Exception ex, string fileName)
 		{
 			var error = new TemplatingHostProcessTemplateError(ex, fileName);
@@ -98,7 +105,7 @@ namespace ICSharpCode.TextTemplating
 
 		void AddOutputFileToProjectIfRequired()
 		{
-			context.EnsureOutputFileIsInProject(projectFile, host.OutputFile);
+			context.EnsureOutputFileIsInProject(templateFile, host.OutputFile);
 		}
 	}
 }

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

@@ -57,6 +57,7 @@
     <Compile Include="Src\ITextTemplatingCustomToolContext.cs" />
     <Compile Include="Src\ITextTemplatingHost.cs" />
     <Compile Include="Src\ITextTemplatingFileGenerator.cs" />
+    <Compile Include="Src\NamespaceHint.cs" />
     <Compile Include="Src\TemplatingHostProcessTemplateError.cs" />
     <Compile Include="Src\TextTemplatingAppDomain.cs" />
     <Compile Include="Src\TextTemplatingAppDomainFactory.cs" />

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

@@ -18,6 +18,8 @@ namespace TextTemplating.Tests.Helpers
 		public bool IsBringErrorsPadToFrontCalled;
 		public Exception ExceptionPassedToDebugLog;
 		public string MessagePassedToDebugLog;
+		public string NamePassedToSetLogicalCallContextData;
+		public object DataPassedToSetLogicalCallContextData;
 		
 		public List<Task> TasksAdded = new List<Task>();
 		
@@ -58,5 +60,11 @@ namespace TextTemplating.Tests.Helpers
 			MessagePassedToDebugLog = message;
 			ExceptionPassedToDebugLog = ex;
 		}
+		
+		public void SetLogicalCallContextData(string name, object data)
+		{
+			NamePassedToSetLogicalCallContextData = name;
+			DataPassedToSetLogicalCallContextData = data;
+		}
 	}
 }

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

@@ -0,0 +1,29 @@
+// 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.Internal.Templates;
+using ICSharpCode.SharpDevelop.Project;
+
+namespace TextTemplating.Tests.Helpers
+{
+	public static class ProjectHelper
+	{
+		public static IProject CreateProject()
+		{
+			var info = new ProjectCreateInformation();
+			info.Solution = new Solution();
+			info.OutputProjectFileName = @"d:\projects\MyProject\MyProject.csproj";
+			info.ProjectName = "MyProject";
+			return new MSBuildBasedProject(info);
+		}
+		
+		/// <summary>
+		/// Project.RootNamespace returns Project.Name
+		/// </summary>
+		public static void SetProjectRootNamespace(IProject project, string rootNamespace)
+		{
+			project.Name = rootNamespace;
+		}
+	}
+}

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

@@ -11,7 +11,7 @@ namespace TextTemplating.Tests.Helpers
 		string fileName;
 		
 		public TestableFileProjectItem(string fileName)
-			: base(null, ItemType.None)
+			: base(ProjectHelper.CreateProject(), ItemType.None)
 		{
 			this.fileName = fileName;
 		}

src/AddIns/Misc/TextTemplating/Test/Src/NamespaceHintTests.cs

@@ -0,0 +1,54 @@
+// 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;
+using ICSharpCode.TextTemplating;
+using NUnit.Framework;
+using TextTemplating.Tests.Helpers;
+
+namespace TextTemplating.Tests
+{
+	[TestFixture]
+	public class NamespaceHintTests
+	{
+		NamespaceHint namespaceHint;
+		IProject project;
+		FileProjectItem templateFile;
+		
+		void CreateProjectTemplateFile()
+		{
+			project = ProjectHelper.CreateProject();
+			templateFile = new FileProjectItem(project, ItemType.None, "MyTemplate.tt");
+		}
+		
+		void CreateNamespaceHint()
+		{
+			namespaceHint = new NamespaceHint(templateFile);
+		}
+		
+		[Test]
+		public void ToString_TemplateFileHasCustomToolNamespaceSetToTest_ReturnsTest()
+		{
+			CreateProjectTemplateFile();
+			templateFile.SetMetadata("CustomToolNamespace", "Test");
+			CreateNamespaceHint();
+			
+			string result = namespaceHint.ToString();
+			
+			Assert.AreEqual("Test", result);
+		}
+		
+		[Test]
+		public void ToString_TemplateFileHasNoCustomToolNamespace_ReturnsProjectRootNamespace()
+		{
+			CreateProjectTemplateFile();
+			ProjectHelper.SetProjectRootNamespace(project, "ProjectRootNamespace");
+			CreateNamespaceHint();
+			
+			string result = namespaceHint.ToString();
+			
+			Assert.AreEqual("ProjectRootNamespace", result);
+		}
+	}
+}

src/AddIns/Misc/TextTemplating/Test/Src/TextTemplatingAssemblyResolverTests.cs

@@ -6,6 +6,7 @@ using ICSharpCode.SharpDevelop.Internal.Templates;
 using ICSharpCode.SharpDevelop.Project;
 using ICSharpCode.TextTemplating;
 using NUnit.Framework;
+using TextTemplating.Tests.Helpers;
 
 namespace TextTemplating.Tests
 {
@@ -17,11 +18,7 @@ namespace TextTemplating.Tests
 		
 		void CreateResolver()
 		{
-			var info = new ProjectCreateInformation();
-			info.Solution = new Solution();
-			info.OutputProjectFileName = @"d:\projects\MyProject\MyProject.cs";
-			info.ProjectName = "MyProject";
-			project = new MSBuildBasedProject(info);
+			project = ProjectHelper.CreateProject();
 			resolver = new TextTemplatingAssemblyResolver(project);
 		}
 		

src/AddIns/Misc/TextTemplating/Test/Src/TextTemplatingFileGeneratorCustomToolTests.cs

@@ -2,9 +2,7 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
-using ICSharpCode.SharpDevelop.Internal.Templates;
 using ICSharpCode.SharpDevelop.Project;
-using ICSharpCode.TextTemplating;
 using NUnit.Framework;
 using TextTemplating.Tests.Helpers;
 
@@ -20,11 +18,6 @@ namespace TextTemplating.Tests
 			customTool = new TestableTextTemplatingFileGeneratorCustomTool();
 		}
 		
-		IProject CreateProject()
-		{
-			return new MSBuildFileProject(@"d:\projects\test.csproj", "test");
-		}
-		
 		FileProjectItem GenerateCodeWithProjectFile()
 		{
 			var file = new TestableFileProjectItem("test.tt");
@@ -45,7 +38,7 @@ namespace TextTemplating.Tests
 		public void GenerateCode_CustomToolContextPassed_CustomToolContextUsedToCreateTextTemplatingFileGenerator()
 		{
 			CreateCustomTool();
-			IProject project = CreateProject();
+			IProject project = ProjectHelper.CreateProject();
 			var context = new CustomToolContext(project);
 			customTool.GenerateCode(null, context);
 			

src/AddIns/Misc/TextTemplating/Test/Src/TextTemplatingFileGeneratorTests.cs

@@ -212,5 +212,27 @@ namespace TextTemplating.Tests
 			
 			Assert.AreEqual("error", task.Description);
 		}
+		
+		[Test]
+		public void ProcessTemplate_CustomToolNamespaceNotSet_LogicalCallContextNamespaceHintDataIsSet()
+		{
+			var templateFile = CreateGenerator(@"d:\a.tt");
+			templateFile.Project.Name = "Test";
+			generator.ProcessTemplate();
+			
+			Assert.AreEqual("NamespaceHint", customToolContext.NamePassedToSetLogicalCallContextData);
+		}
+		
+		[Test]
+		public void ProcessTemplate_CustomToolNamespaceNotSet_LogicalCallContextNamespaceHintDataIsSetBefore()
+		{
+			var templateFile = CreateGenerator(@"d:\a.tt");
+			templateFile.Project.Name = "Test";
+			generator.ProcessTemplate();
+			
+			string data = customToolContext.DataPassedToSetLogicalCallContextData as String;
+			
+			Assert.AreEqual("Test", data);
+		}
 	}
 }

src/AddIns/Misc/TextTemplating/Test/TextTemplating.Tests.csproj

@@ -61,10 +61,12 @@
     <Compile Include="Helpers\FakeTextTemplatingCustomToolContext.cs" />
     <Compile Include="Helpers\FakeTextTemplatingHost.cs" />
     <Compile Include="Helpers\FakeTextTemplatingFileGenerator.cs" />
+    <Compile Include="Helpers\ProjectHelper.cs" />
     <Compile Include="Helpers\TestableFileProjectItem.cs" />
     <Compile Include="Helpers\TestableTextTemplatingFileGeneratorCustomTool.cs" />
     <Compile Include="Helpers\TestableTextTemplatingHost.cs" />
     <Compile Include="Src\CompilerErrorTaskTests.cs" />
+    <Compile Include="Src\NamespaceHintTests.cs" />
     <Compile Include="Src\TextTemplatingAssemblyResolverTests.cs" />
     <Compile Include="Src\TextTemplatingFileGeneratorCustomToolTests.cs" />
     <Compile Include="Src\TextTemplatingFileGeneratorTests.cs" />