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//
// InsertAnonymousMethodSignature.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2011 Mike Krüger <mkrueger@novell.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 ICSharpCode.NRefactory.TypeSystem;
using System.Linq;
using System.Text;
using System.Threading;
using System.Collections.Generic;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[ContextAction("Insert anonymous method signature", Description = "Inserts a signature to parameterless anonymous methods.")]
public class InsertAnonymousMethodSignatureAction : ICodeActionProvider
{
public IEnumerable<CodeAction> GetActions(RefactoringContext context)
{
IType type;
var anonymousMethodExpression = GetAnonymousMethodExpression(context, out type);
if (anonymousMethodExpression == null) {
yield break;
}
yield return new CodeAction (context.TranslateString("Insert anonymous method signature"), script => {
var delegateMethod = type.GetDelegateInvokeMethod();
var sb = new StringBuilder ("(");
for (int k = 0; k < delegateMethod.Parameters.Count; k++) {
if (k > 0) {
sb.Append(", ");
}
var paramType = delegateMethod.Parameters [k].Type;
sb.Append(context.CreateShortType(paramType));
sb.Append(" ");
sb.Append(delegateMethod.Parameters [k].Name);
}
sb.Append(")");
script.InsertText(context.GetOffset(anonymousMethodExpression.DelegateToken.EndLocation), sb.ToString());
}, anonymousMethodExpression);
}
static AnonymousMethodExpression GetAnonymousMethodExpression (RefactoringContext context, out IType delegateType)
{
delegateType = null;
var anonymousMethodExpression = context.GetNode<AnonymousMethodExpression> ();
if (anonymousMethodExpression == null || !anonymousMethodExpression.DelegateToken.Contains (context.Location) || anonymousMethodExpression.HasParameterList)
return null;
IType resolvedType = null;
var parent = anonymousMethodExpression.Parent;
if (parent is AssignmentExpression) {
resolvedType = context.Resolve (((AssignmentExpression)parent).Left).Type;
} else if (parent is VariableInitializer) {
resolvedType = context.Resolve (((VariableDeclarationStatement)parent.Parent).Type).Type;
} else if (parent is InvocationExpression) {
// TODO: handle invocations
}
if (resolvedType == null)
return null;
delegateType = resolvedType;
if (delegateType.Kind != TypeKind.Delegate)
return null;
return anonymousMethodExpression;
}
}
}
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