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//
// ImplementNotImplementedProperty.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc. (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;
using System.Collections.Generic;
using System.Linq;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[ContextAction("Create a backing field for a not implemented property", Description = "Creates a backing field for a not implemented property.")]
public class ImplementNotImplementedProperty : ICodeActionProvider
{
bool IsNotImplemented(RefactoringContext context, BlockStatement body)
{
if (body.IsNull)
return true;
if (body.Statements.Count == 1) {
var throwStmt = body.Statements.First () as ThrowStatement;
if (throwStmt != null) {
return context.Resolve (throwStmt.Expression).Type.FullName == "System.NotImplementedException";
}
}
return false;
}
public IEnumerable<CodeAction> GetActions(RefactoringContext context)
{
var property = context.GetNode<PropertyDeclaration> ();
if (property == null ||
!IsNotImplemented (context, property.Getter.Body) ||
!IsNotImplemented (context, property.Setter.Body)) {
yield break;
}
yield return new CodeAction(context.TranslateString("Implement property"), script => {
string backingStoreName = context.GetNameProposal (property.Name);
// create field
var backingStore = new FieldDeclaration ();
if (property.Modifiers.HasFlag (Modifiers.Static))
backingStore.Modifiers |= Modifiers.Static;
if (property.Setter.IsNull)
backingStore.Modifiers |= Modifiers.Readonly;
backingStore.ReturnType = property.ReturnType.Clone ();
var initializer = new VariableInitializer (backingStoreName);
backingStore.Variables.Add (initializer);
// create new property & implement the get/set bodies
var newProperty = (PropertyDeclaration)property.Clone ();
Expression id1;
if (backingStoreName == "value")
id1 = new ThisReferenceExpression().Member("value");
else
id1 = new IdentifierExpression (backingStoreName);
Expression id2 = id1.Clone();
newProperty.Getter.Body = new BlockStatement () {
new ReturnStatement (id1)
};
if (!property.Setter.IsNull) {
newProperty.Setter.Body = new BlockStatement () {
new AssignmentExpression (id2, AssignmentOperatorType.Assign, new IdentifierExpression ("value"))
};
}
script.Replace (property, newProperty);
script.InsertBefore (property, backingStore);
if (!property.Setter.IsNull)
script.Link (initializer, id1, id2);
else
script.Link (initializer, id1);
}, property.NameToken);
}
}
}
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