private static string GetCannotExtractMessage(AP.CannotExtractReason reason)
{
switch (reason)
{
case AP.CannotExtractReason.InvalidTargetSelected:
return(Strings.ExtractMethodInvalidTargetSelected);
case AP.CannotExtractReason.InvalidExpressionSelected:
return(Strings.ExtractMethodInvalidExpressionSelected);
case AP.CannotExtractReason.MethodAssignsVariablesAndReturns:
return(Strings.ExtractMethodAssignsVariablesAndReturns);
case AP.CannotExtractReason.StatementsFromClassDefinition:
return(Strings.ExtractMethodStatementsFromClassDefinition);
case AP.CannotExtractReason.SelectionContainsBreakButNotEnclosingLoop:
return(Strings.ExtractMethodSelectionContainsBreakButNotEnclosingLoop);
case AP.CannotExtractReason.SelectionContainsContinueButNotEnclosingLoop:
return(Strings.ExtractMethodSelectionContainsContinueButNotEnclosingLoop);
case AP.CannotExtractReason.ContainsYieldExpression:
return(Strings.ExtractMethodContainsYieldExpression);
case AP.CannotExtractReason.ContainsFromImportStar:
return(Strings.ExtractMethodContainsFromImportStar);
case AP.CannotExtractReason.SelectionContainsReturn:
return(Strings.ExtractMethodSelectionContainsReturn);
default:
return(null);
}
}
private static bool IsValidExtraction(SelectionTarget target, out AP.CannotExtractReason failureReason)
{
if (target.Parents[target.Parents.Count - 1] is ClassDefinition)
{
failureReason = AP.CannotExtractReason.StatementsFromClassDefinition;
return(false);
}
var breakContinueWalker = new ContinueBreakWalker();
target.Walk(breakContinueWalker);
if (breakContinueWalker.ContainsBreak)
{
failureReason = AP.CannotExtractReason.SelectionContainsBreakButNotEnclosingLoop;
return(false);
}
else if (breakContinueWalker.ContainsContinue)
{
failureReason = AP.CannotExtractReason.SelectionContainsContinueButNotEnclosingLoop;
return(false);
}
var yieldWalker = new YieldWalker();
target.Walk(yieldWalker);
if (yieldWalker.ContainsYield)
{
failureReason = AP.CannotExtractReason.ContainsYieldExpression;
return(false);
}
var importStarWalker = new ImportStarWalker();
target.Walk(importStarWalker);
if (importStarWalker.ContainsImportStar)
{
failureReason = AP.CannotExtractReason.ContainsFromImportStar;
return(false);
}
var returnWalker = new ReturnWalker();
target.Walk(returnWalker);
if (returnWalker.ContainsReturn && !returnWalker.Returns)
{
failureReason = AP.CannotExtractReason.SelectionContainsReturn;
return(false);
}
target.ContainsReturn = returnWalker.ContainsReturn;
failureReason = AP.CannotExtractReason.None;
return(true);
}
