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//
// CreateLocalVariable.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2011 Novell, Inc (http://www.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.Collections.Generic;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[ContextAction("Create local variable", Description = "Creates a local variable for a undefined variable.")]
public class CreateLocalVariableAction : ICodeActionProvider
{
public IEnumerable<CodeAction> GetActions(RefactoringContext context)
{
var identifier = context.GetNode<IdentifierExpression>();
if (identifier == null) {
yield break;
}
if (CreateFieldAction.IsInvocationTarget(identifier)) {
yield break;
}
var statement = context.GetNode<Statement>();
if (statement == null) {
yield break;
}
if (!(context.Resolve(identifier).IsError)) {
yield break;
}
var guessedType = CreateFieldAction.GuessAstType(context, identifier);
if (guessedType == null) {
yield break;
}
yield return new CodeAction(context.TranslateString("Create local variable"), script => {
var initializer = new VariableInitializer(identifier.Identifier);
var decl = new VariableDeclarationStatement() {
Type = guessedType,
Variables = { initializer }
};
if (identifier.Parent is AssignmentExpression && ((AssignmentExpression)identifier.Parent).Left == identifier) {
initializer.Initializer = ((AssignmentExpression)identifier.Parent).Right.Clone();
if (!context.UseExplicitTypes)
decl.Type = new SimpleType("var");
script.Replace(statement, decl);
} else {
script.InsertBefore(statement, decl);
}
}, identifier);
}
}
}
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