public override IEnumerable <CodeAction> GetActions(RefactoringContext context)
{
if (!context.IsSomethingSelected)
{
yield break;
}
var selected = new List <AstNode>(context.GetSelectedNodes());
if (selected.Count != 1 || !(selected [0] is Expression))
{
yield break;
}
var expr = selected [0] as Expression;
if (expr is ArrayInitializerExpression)
{
var arr = (ArrayInitializerExpression)expr;
if (arr.IsSingleElement)
{
expr = arr.Elements.First();
}
else
{
yield break;
}
}
var visitor = new SearchNodeVisitior(expr);
var node = context.GetNode <BlockStatement>();
if (node != null)
{
node.AcceptVisitor(visitor);
}
yield return(new CodeAction(context.TranslateString("Declare local variable"), script => {
var resolveResult = context.Resolve(expr);
var guessedType = resolveResult.Type;
if (resolveResult is MethodGroupResolveResult)
{
guessedType = GetDelegateType(context, ((MethodGroupResolveResult)resolveResult).Methods.First(), expr);
}
var name = CreateMethodDeclarationAction.CreateBaseName(expr, guessedType);
name = context.GetLocalNameProposal(name, expr.StartLocation);
var type = context.UseExplicitTypes ? context.CreateShortType(guessedType) : new SimpleType("var");
var varDecl = new VariableDeclarationStatement(type, name, expr.Clone());
var replaceNode = visitor.Matches.First() as Expression;
if (replaceNode.Parent is ExpressionStatement)
{
script.Replace(replaceNode.Parent, varDecl);
script.Select(varDecl.Variables.First().NameToken);
}
else
{
var containing = replaceNode.Parent;
while (!(containing.Parent is BlockStatement))
{
containing = containing.Parent;
}
script.InsertBefore(containing, varDecl);
var identifierExpression = new IdentifierExpression(name);
script.Replace(replaceNode, identifierExpression);
script.Link(varDecl.Variables.First().NameToken, identifierExpression);
}
}, expr));
if (visitor.Matches.Count > 1)
{
yield return(new CodeAction(string.Format(context.TranslateString("Declare local variable (replace '{0}' occurrences)"), visitor.Matches.Count), script => {
var resolveResult = context.Resolve(expr);
var guessedType = resolveResult.Type;
if (resolveResult is MethodGroupResolveResult)
{
guessedType = GetDelegateType(context, ((MethodGroupResolveResult)resolveResult).Methods.First(), expr);
}
var linkedNodes = new List <AstNode>();
var name = CreateMethodDeclarationAction.CreateBaseName(expr, guessedType);
name = context.GetLocalNameProposal(name, expr.StartLocation);
var type = context.UseExplicitTypes ? context.CreateShortType(guessedType) : new SimpleType("var");
var varDecl = new VariableDeclarationStatement(type, name, expr.Clone());
linkedNodes.Add(varDecl.Variables.First().NameToken);
var first = visitor.Matches [0];
if (first.Parent is ExpressionStatement)
{
script.Replace(first.Parent, varDecl);
}
else
{
var containing = first.Parent;
while (!(containing.Parent is BlockStatement))
{
containing = containing.Parent;
}
script.InsertBefore(containing, varDecl);
var identifierExpression = new IdentifierExpression(name);
linkedNodes.Add(identifierExpression);
script.Replace(first, identifierExpression);
}
for (int i = 1; i < visitor.Matches.Count; i++)
{
var identifierExpression = new IdentifierExpression(name);
linkedNodes.Add(identifierExpression);
script.Replace(visitor.Matches [i], identifierExpression);
}
script.Link(linkedNodes.ToArray());
}, expr));
}
}