static bool VariableExists(VariableLookupVisitor visitor, string name)
{
foreach (var descriptor in visitor.Variables.Values)
{
if (descriptor.Name == name)
{
return(true);
}
}
return(false);
}
static string CreateVariableName(MonoDevelop.Projects.Dom.IReturnType returnType, VariableLookupVisitor visitor)
{
string[] possibleNames = GetPossibleName(returnType);
foreach (string name in possibleNames)
{
if (!VariableExists(visitor, name))
{
return(name);
}
}
foreach (string name in possibleNames)
{
for (int i = 1; i < 99; i++)
{
if (!VariableExists(visitor, name + i.ToString()))
{
return(name + i.ToString());
}
}
}
return("a" + returnType.Name);
}
public override List <Change> PerformChanges(RefactoringOptions options, object prop)
{
varCount = 0;
selectionStart = selectionEnd = -1;
List <Change> result = new List <Change> ();
IResolver resolver = options.GetResolver();
INRefactoryASTProvider provider = options.GetASTProvider();
TextEditorData data = options.GetTextEditorData();
if (resolver == null || provider == null || data == null)
{
return(result);
}
DocumentLocation endPoint;
if (data.IsSomethingSelected)
{
endPoint = data.MainSelection.Anchor < data.MainSelection.Lead ? data.MainSelection.Lead : data.MainSelection.Anchor;
}
else
{
endPoint = data.Caret.Location;
}
ResolveResult resolveResult;
LineSegment lineSegment;
var unit = provider.ParseFile(data.Document.Text);
if (unit == null)
{
LoggingService.LogError("Declare local error: parese file == null");
return(result);
}
var visitor = new VariableLookupVisitor(resolver, new DomLocation(endPoint.Line, endPoint.Column));
if (options.ResolveResult == null)
{
LoggingService.LogError("Declare local error: resolve result == null");
return(result);
}
IMember callingMember = options.ResolveResult.CallingMember;
if (callingMember != null)
{
visitor.MemberLocation = new AstLocation(callingMember.Location.Column, callingMember.Location.Line);
}
unit.AcceptVisitor(visitor, null);
ExpressionResult expressionResult = new ExpressionResult(data.SelectedText.Trim());
if (expressionResult.Expression.Contains(" ") || expressionResult.Expression.Contains("\t"))
{
expressionResult.Expression = "(" + expressionResult.Expression + ")";
}
resolveResult = resolver.Resolve(expressionResult, new DomLocation(endPoint.Line, endPoint.Column));
if (resolveResult == null)
{
return(result);
}
IReturnType resolvedType = GetResolvedType(options, resolveResult);
AstType returnType;
if (resolveResult.ResolvedType == null || string.IsNullOrEmpty(resolveResult.ResolvedType.Name))
{
returnType = new SimpleType("var");
}
else
{
returnType = options.ShortenTypeName(resolvedType).ConvertToTypeReference();
}
varName = CreateVariableName(resolvedType, visitor);
options.ParseMember(resolveResult.CallingMember);
// insert local variable declaration
TextReplaceChange insert = new TextReplaceChange();
insert.FileName = options.Document.FileName;
insert.Description = GettextCatalog.GetString("Insert variable declaration");
var varDecl = new VariableDeclarationStatement(returnType, varName, provider.ParseExpression(data.SelectedText));
var node = unit.GetNodeAt(endPoint.Line, endPoint.Column);
var containing = node.Parent;
while (!(containing.Parent is BlockStatement))
{
containing = containing.Parent;
}
if (containing is BlockStatement)
{
lineSegment = data.Document.GetLine(data.Caret.Line);
}
else
{
lineSegment = data.Document.GetLine(containing.StartLocation.Line);
}
insert.Offset = lineSegment.Offset;
insert.InsertedText = options.GetWhitespaces(lineSegment.Offset) + provider.OutputNode(options.Dom, varDecl);
var insertOffset = insert.Offset + options.GetWhitespaces(lineSegment.Offset).Length + provider.OutputNode(options.Dom, varDecl.Type).Length + " ".Length;
offsets.Add(insertOffset);
result.Add(insert);
varCount++;
// replace main selection
TextReplaceChange replace = new TextReplaceChange();
replace.FileName = options.Document.FileName;
replace.Offset = data.SelectionRange.Offset;
replace.RemovedChars = data.SelectionRange.Length;
replace.InsertedText = varName;
result.Add(replace);
int delta = insert.InsertedText.Length - insert.RemovedChars;
offsets.Add(replace.Offset + delta);
Console.WriteLine(replace.Offset);
delta += varName.Length - replace.RemovedChars;
varCount++;
selectionStart = insert.Offset;
if (replaceAll)
{
matches.Sort((x, y) => x.StartLocation.CompareTo(y.StartLocation));
foreach (var match in matches)
{
replace = new TextReplaceChange();
replace.FileName = options.Document.FileName;
int start = data.LocationToOffset(match.StartLocation.Line, match.StartLocation.Column);
int end = data.LocationToOffset(match.EndLocation.Line, match.EndLocation.Column);
replace.Offset = start;
replace.RemovedChars = end - start;
replace.InsertedText = varName;
result.Add(replace);
offsets.Add(start + delta);
delta += varName.Length - replace.RemovedChars;
}
}
return(result);
}