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|   | 
| using System.Globalization;  | 
| using System.Text.RegularExpressions;  | 
| using System.Windows.Controls;  | 
|   | 
| namespace QtVsTools.Wizards.Util  | 
| {  | 
|     internal class ClassNameValidationRule : VCLanguageManagerValidationRule  | 
|     {  | 
|         public ClassNameValidationRule()  | 
|         {  | 
|             SupportNamespaces = false;  | 
|             AllowEmptyIdentifier = false;  | 
|         }  | 
|   | 
|         public override ValidationResult Validate(object value, CultureInfo cultureInfo)  | 
|         {  | 
|             if (value is string) {  | 
|                 var identifier = value as string;  | 
|                 if (AllowEmptyIdentifier && string.IsNullOrEmpty(identifier))  | 
|                     return ValidationResult.ValidResult;  | 
|   | 
|                 if (SupportNamespaces) {  | 
|                     var index = identifier.LastIndexOf(@"::", System.StringComparison.Ordinal);  | 
|                     if (index >= 0)  | 
|                         identifier = identifier.Substring(index + 2);  | 
|                 }  | 
|   | 
|                 if (Regex.IsMatch(identifier, pattern) && !Vclm.IsReservedName(identifier))  | 
|                     return ValidationResult.ValidResult;  | 
|             }  | 
|             return new ValidationResult(false, @"Invalid identifier.");  | 
|         }  | 
|   | 
|         public bool SupportNamespaces { get; set; }  | 
|         public bool AllowEmptyIdentifier { get; set; }  | 
|   | 
|         const string pattern = @"^[a-zA-Z_][a-zA-Z0-9_]*$";  | 
|     }  | 
| }  |