mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/View/VBIdentifierName.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.View
   6 {
   7     using System.CodeDom.Compiler;
   8     using System.Globalization;
   9     using System.Windows;
  10     using System.Xaml;
  11     using System.Xml;
  12     using Microsoft.CSharp;
  13     using Microsoft.VisualBasic;
  14
  15     /// <summary>
  16     /// The class is not only used for VB(Dev10), but also for C# (Dev11).
  17     /// </summary>
  18     internal class VBIdentifierName : DependencyObject
  19     {
  20         public static readonly DependencyProperty IdentifierNameProperty =
  21             DependencyProperty.Register("IdentifierName", typeof(string), typeof(VBIdentifierName), new UIPropertyMetadata(OnIdentifierNameChanged));
  22
  23         public static readonly DependencyProperty IsValidProperty =
  24             DependencyProperty.Register("IsValid", typeof(bool), typeof(VBIdentifierName));
  25
  26         public static readonly DependencyProperty ErrorMessageProperty =
  27             DependencyProperty.Register("ErrorMessage", typeof(string), typeof(VBIdentifierName));
  28
  29         static VBCodeProvider vbProvider;
  30         static CSharpCodeProvider csProvider;
  31         static XamlSchemaContext xamlContext = new XamlSchemaContext();
  32         static XamlType xamlType = new XamlType(typeof(string), xamlContext);
  33
  34         bool checkAgainstXaml;
  35
  36         VBCodeProvider VBProvider
  37         {
  38             get
  39             {
  40                 if (vbProvider == null)
  41                 {
  42                     vbProvider = CodeDomProvider.CreateProvider("VisualBasic") as VBCodeProvider;
  43                 }
  44                 return vbProvider;
  45             }
  46         }
  47
  48         CSharpCodeProvider CSProvider
  49         {
  50             get
  51             {
  52                 if (csProvider == null)
  53                 {
  54                     csProvider = CodeDomProvider.CreateProvider("C#") as CSharpCodeProvider;
  55                 }
  56
  57                 return csProvider;
  58             }
  59         }
  60
  61         public string ErrorMessage
  62         {
  63             get { return (string)GetValue(ErrorMessageProperty); }
  64             set { SetValue(ErrorMessageProperty, value); }
  65         }
  66
  67         public bool IsValid
  68         {
  69             get { return (bool)GetValue(IsValidProperty); }
  70             set { SetValue(IsValidProperty, value); }
  71         }
  72
  73         public string IdentifierName
  74         {
  75             get { return (string)GetValue(IdentifierNameProperty); }
  76             set { SetValue(IdentifierNameProperty, value); }
  77         }
  78
  79         public bool CheckAgainstXaml
  80         {
  81             get
  82             {
  83                 return this.checkAgainstXaml;
  84             }
  85         }
  86
  87         public VBIdentifierName()
  88         {
  89             this.checkAgainstXaml = false;
  90         }
  91
  92         public VBIdentifierName(bool checkAgainstXaml)
  93         {
  94             this.checkAgainstXaml = checkAgainstXaml;
  95         }
  96
  97         static void OnIdentifierNameChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
  98         {
  99             ((VBIdentifierName)sender).OnIdentifierNameChanged();
 100         }
 101
 102         internal static bool IsValidXamlName(string name)
 103         {
 104             bool isValid = new XamlMember(name, xamlType, false).IsNameValid;
 105
 106             if (isValid)
 107             {
 108                 //Work around TFS bug #825815, in some cases, XamlMember.IsNameValid returns true but it's not valid Xml Name.
 109                 try
 110                 {
 111                     XmlConvert.VerifyName(name);
 112                 }
 113                 catch (XmlException)
 114                 {
 115                     isValid = false;
 116                 }
 117             }
 118
 119             return isValid;
 120         }
 121
 122         void OnIdentifierNameChanged()
 123         {
 124             string trimedName = this.IdentifierName;
 125             if (this.CheckAgainstXaml && !VBIdentifierName.IsValidXamlName(trimedName))
 126             {
 127                 this.IsValid = false;
 128                 this.ErrorMessage = string.Format(CultureInfo.CurrentUICulture, SR.InvalidXamlMemberName, trimedName);
 129             }
 130             else if (!this.VBProvider.IsValidIdentifier(trimedName) || !this.CSProvider.IsValidIdentifier(trimedName))
 131             {
 132                 this.IsValid = false;
 133                 this.ErrorMessage = string.Format(CultureInfo.CurrentUICulture, SR.InvalidIdentifier, trimedName);
 134             }
 135             else if (trimedName.StartsWith("[", StringComparison.Ordinal) && trimedName.EndsWith("]", StringComparison.Ordinal))
 136             {
 137                 this.IsValid = false;
 138                 this.ErrorMessage = string.Format(CultureInfo.CurrentUICulture, SR.InvalidIdentifier, trimedName);
 139             }
 140             else
 141             {
 142                 this.IsValid = true;
 143                 this.ErrorMessage = string.Empty;
 144             }
 145         }
 146     }
 147 }