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//
// ConvertToInitializerAction.cs
//
// Author:
// Simon Lindgren <simon.n.lindgren@gmail.com>
//
// Copyright (c) 2012 Simon Lindgren
//
// 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;
using ICSharpCode.NRefactory.Semantics;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[ContextAction("Convert to initializer",
Description = "Converts a set of assignments and .Add() calls to an initializer.")]
public class ConvertToInitializerAction : ICodeActionProvider
{
#region ICodeActionProvider implementation
public IEnumerable<CodeAction> GetActions(RefactoringContext context)
{
var initializer = context.GetNode<VariableInitializer>();
if (initializer != null) {
var action = HandleInitializer(context, initializer);
if (action != null)
yield return action;
}
var expressionStatement = context.GetNode<ExpressionStatement>();
if (expressionStatement != null) {
var action = HandleExpressionStatement(context, expressionStatement);
if (action != null)
yield return action;
}
}
CodeAction HandleInitializer(RefactoringContext context, VariableInitializer initializer)
{
var objectCreateExpression = initializer.Initializer as ObjectCreateExpression;
if (objectCreateExpression == null)
return null;
var initializerRR = context.Resolve(initializer) as LocalResolveResult;
if (initializerRR == null)
return null;
IList<AstNode> statements = GetNodes(context.GetNode<Statement>());
var converter = new StatementsToInitializerConverter(context);
var newInitializer = converter.ConvertToInitializer(initializer, ref statements);
if (newInitializer == null || statements.Count == 0)
return null;
return MakeAction(context, initializer, newInitializer, statements);
}
CodeAction HandleExpressionStatement(RefactoringContext context, ExpressionStatement expressionStatement)
{
var expression = expressionStatement.Expression as AssignmentExpression;
if (expression == null || expression.Operator != AssignmentOperatorType.Assign)
return null;
if (!(expression.Right is ObjectCreateExpression))
return null;
var expressionResolveResult = context.Resolve(expression.Left);
if (!(expressionResolveResult is LocalResolveResult) && !(expressionResolveResult is MemberResolveResult))
return null;
IList<AstNode> statements = GetNodes(context.GetNode<Statement>());
var converter = new StatementsToInitializerConverter(context);
var newExpression = converter.ConvertToInitializer(expression, ref statements);
if (newExpression == null || statements.Count == 0)
return null;
return MakeAction(context, expression, newExpression, statements);
}
List<AstNode> GetNodes(Statement startStatement)
{
var statements = new List<AstNode>();
AstNode currentNode = startStatement.NextSibling;
while (currentNode != null) {
if (currentNode is Statement || currentNode is Comment)
statements.Add(currentNode);
currentNode = currentNode.NextSibling;
}
return statements;
}
CodeAction MakeAction(RefactoringContext context, AstNode oldNode, AstNode replacementNode, IEnumerable<AstNode> toRemove)
{
return new CodeAction(context.TranslateString("Convert to initializer"), script => {
foreach (var statement in toRemove)
script.Remove(statement);
script.Replace(oldNode, replacementNode);
}, oldNode);
}
#endregion
}
}
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