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Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/UseExplicitTypeAction.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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contrib/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/UseExplicitTypeAction.cs
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// 
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// UseExplicitType.cs
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//  
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// Author:
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//       Mike Krüger <mkrueger@novell.com>
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// 
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// Copyright (c) 2011 Mike Krüger <mkrueger@novell.com>
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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 System.Linq;
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using ICSharpCode.NRefactory.PatternMatching;
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using ICSharpCode.NRefactory.TypeSystem;
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using System.Threading;
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using System.Collections.Generic;
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
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{
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        [ContextAction("Use explicit type", Description = "Converts local variable declaration to be explicit typed.")]
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        public class UseExplicitTypeAction: ICodeActionProvider
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        {
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                public IEnumerable<CodeAction> GetActions(RefactoringContext context)
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                {
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                        var varDecl = GetVariableDeclarationStatement(context);
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                        IType type;
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                        if (varDecl != null) {
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                                type = context.Resolve(varDecl.Variables.First().Initializer).Type;
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                        } else {
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                                var foreachStatement = GetForeachStatement(context);
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                                if (foreachStatement == null) {
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                                        yield break;
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                                }
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                                type = context.Resolve(foreachStatement.VariableType).Type;
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                        }
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                        if (!(!type.Equals(SpecialType.NullType) && !type.Equals(SpecialType.UnknownType))) {
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                                yield break;
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                        }
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                        yield return new CodeAction (context.TranslateString("Use expcicit type"), script => {
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                                if (varDecl != null) {
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                                        script.Replace (varDecl.Type, context.CreateShortType (type));
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                                } else {
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                                        var foreachStatement = GetForeachStatement (context);
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                                        script.Replace (foreachStatement.VariableType, context.CreateShortType (type));
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                                }
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                        });
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                }
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                static readonly AstType varType = new SimpleType ("var");
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                static VariableDeclarationStatement GetVariableDeclarationStatement (RefactoringContext context)
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                {
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                        var result = context.GetNode<VariableDeclarationStatement> ();
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                        if (result != null && result.Variables.Count == 1 && !result.Variables.First ().Initializer.IsNull && result.Type.Contains (context.Location.Line, context.Location.Column) && result.Type.IsMatch (varType)) {
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                                if (context.Resolve (result.Variables.First ().Initializer) == null)
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                                        return null;
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                                return result;
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                        }
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                        return null;
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                }
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                static ForeachStatement GetForeachStatement (RefactoringContext context)
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                {
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                        var result = context.GetNode<ForeachStatement> ();
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                        if (result != null && result.VariableType.Contains (context.Location) && result.VariableType.IsMatch (varType))
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                                return result;
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                        return null;
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                }
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        }
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}
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