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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertLambdaToAnonymousDelegateAction.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertLambdaToAnonymousDelegateAction.cs
 
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//
 
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// ConvertLambdaToDelegateAction.cs
 
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//
 
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// Author:
 
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//       Simon Lindgren <simon.n.lindgren@gmail.com>
 
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//
 
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// Copyright (c) 2012 Simon Lindgren
 
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//
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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//
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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//
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using ICSharpCode.NRefactory.CSharp.Resolver;
 
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using System.Collections.Generic;
 
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using ICSharpCode.NRefactory.TypeSystem;
 
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
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{
 
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        [ContextAction("Convert lambda to anonymous delegate",
 
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                       Description = "Converts a lambda to an anonymous delegate.")]
 
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        public class ConvertLambdaToAnonymousDelegateAction : SpecializedCodeAction<LambdaExpression>
 
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        {
 
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                #region implemented abstract members of SpecializedCodeAction
 
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                protected override CodeAction GetAction(RefactoringContext context, LambdaExpression node)
 
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                {
 
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                        if (context.Location < node.StartLocation || context.Location >= node.Body.StartLocation)
 
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                                return null;
 
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                        var lambdaResolveResult = context.Resolve(node) as LambdaResolveResult;
 
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                        if (lambdaResolveResult == null)
 
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                                return null;
 
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                        return new CodeAction(context.TranslateString("Convert to anonymous delegate"), script => {
 
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                                BlockStatement newBody;
 
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                                if (node.Body is BlockStatement) {
 
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                                        newBody = (BlockStatement)node.Body.Clone();
 
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                                } else {
 
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                                        var expression = (Expression)node.Body.Clone();
 
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                                        Statement statement;
 
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                                        if (RequireReturnStatement(context, node)) {
 
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                                                statement = new ReturnStatement(expression);
 
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                                        }
 
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                                        else {
 
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                                                statement = new ExpressionStatement(expression);
 
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                                        }
 
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                                        newBody = new BlockStatement {
 
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                                                Statements = {
 
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                                                        statement
 
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                                                }
 
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                                        };
 
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                                }
 
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                                var method = new AnonymousMethodExpression (newBody, GetParameters(lambdaResolveResult.Parameters, context));
 
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                                script.Replace(node, method);
 
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                        }, node);
 
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                }
 
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                #endregion
 
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                IEnumerable<ParameterDeclaration> GetParameters(IList<IParameter> parameters, RefactoringContext context)
 
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                {
 
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                        if (parameters == null || parameters.Count == 0)
 
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                                return null;
 
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                        var result = new List<ParameterDeclaration> ();
 
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                        foreach (var parameter in parameters) {
 
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                                var type = context.CreateShortType(parameter.Type);
 
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                                var name = parameter.Name;
 
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                                ParameterModifier modifier = ParameterModifier.None;
 
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                                if (parameter.IsRef) 
 
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                                        modifier |= ParameterModifier.Ref;
 
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                                if (parameter.IsOut)
 
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                                        modifier |= ParameterModifier.Out;
 
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                                result.Add (new ParameterDeclaration(type, name, modifier));
 
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                        }
 
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                        return result;
 
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                }
 
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                static bool RequireReturnStatement (RefactoringContext context, LambdaExpression lambda)
 
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                {
 
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                        var type = LambdaHelper.GetLambdaReturnType (context, lambda);
 
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                        return type != null && type.ReflectionName != "System.Void";
 
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                }
 
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        }
 
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}
 
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