SharpDevelop/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/CreateClassDeclarationAction.cs

// 
// CreateClassDeclarationAction.cs
//  
// Author:
//       Mike Krüger <mkrueger@xamarin.com>
// 
// Copyright (c) 2012 Xamarin <http://xamarin.com>
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System.Collections.Generic;
using ICSharpCode.NRefactory.Semantics;
using System.Linq;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	[ContextAction("Create class", Description = "Creates a class declaration out of an object creation.")]
	public class CreateClassDeclarationAction : ICodeActionProvider
	{
		public IEnumerable<CodeAction> GetActions(RefactoringContext context)
		{
			var createExpression = context.GetNode<ObjectCreateExpression>();
			if (createExpression == null) 
				yield break;
			
			var resolveResult = context.Resolve(createExpression) as UnknownIdentifierResolveResult;
			if (resolveResult == null)
				yield break;

			var service = (NamingConventionService)context.GetService(typeof(NamingConventionService));
			if (service != null && !service.IsValidName(resolveResult.Identifier, AffectedEntity.Class)) { 
				yield break;
			}

			yield return new CodeAction(context.TranslateString("Create class"), script => {
				script.CreateNewType(CreateClassDeclaration(context, createExpression));
			});

			yield return new CodeAction(context.TranslateString("Create nested class"), script => {
				script.InsertWithCursor(context.TranslateString("Create nested class"), CreateClassDeclaration(context, createExpression), Script.InsertPosition.Before);
			});
		}

		static TypeDeclaration CreateClassDeclaration(RefactoringContext context, ObjectCreateExpression createExpression)
		{
			string className = createExpression.Type.GetText();
			if (!createExpression.Arguments.Any()) {
				return new TypeDeclaration() { Name = className };
			}
			var decl = new ConstructorDeclaration() {
				Name = className,
				Modifiers = Modifiers.Public,
				Body = new BlockStatement() {
					new ThrowStatement(new ObjectCreateExpression(context.CreateShortType("System", "NotImplementedException")))
				}
			};
			decl.Parameters.AddRange(CreateMethodDeclarationAction.GenerateParameters(context, createExpression.Arguments));
			
			return new TypeDeclaration() {
				Name = className,
				Members = {
					decl
				}
			};
		}
	}
}