RuntimeIdentifierPropertyAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / System / Windows / Markup / RuntimeIdentifierPropertyAttribute.cs / 1305600 / RuntimeIdentifierPropertyAttribute.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// File: RuntimeNamePropertyAttribute.cs
//
// Description: 
//   This attribute is placed on a class to identify the property that will
//   function as an Name for the given class 
// 
// History:
//    1/26/05:    fmunoz        Created 
//
// Copyright (C) 2005 by Microsoft Corporation.  All rights reserved.
//
//--------------------------------------------------------------------------- 

using System; 
using System.Globalization; 
using System.Runtime.CompilerServices;
 
#if PBTCOMPILER
namespace MS.Internal.Markup
#elif WINDOWS_BASE
using MS.Internal.WindowsBase;     // FriendAccessAllowed 
namespace System.Windows.Markup
#else 
namespace System.Windows.Markup 
#endif
{ 
#if !PBTCOMPILER && !TARGETTING35SP1 && !WINDOWS_BASE
    /// 
    /// This attribute is placed on a class to identify the property that will
    /// function as an Name for the given class 
    /// 
    [AttributeUsage(AttributeTargets.Class)] 
    [TypeForwardedFrom("WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")] 
    public sealed class RuntimeNamePropertyAttribute: Attribute
    { 
        /// 
        public RuntimeNamePropertyAttribute(string name)
        {
            _name = name; 
        }
 
        ///  
        /// The Name of the property in the class that will contain the ID of
        /// the class, this property needs to be of type string and have 
        /// both get and set access
        /// 
        public string Name
        { 
            get
            { 
                return _name; 
            }
        } 

        private string _name = null;
    }
#endif 

#if !SYSTEM_XAML 
    ///  
    ///     The string used in RuntimeNameProperty is expected to follow certain
    /// rules.  IsValidIdentifierName checks the given string against the rules. 
    /// NameValidationCallback extends to all object types and is in the right
    /// format to be used as a DependencyProperty ValidateValueCallback
    /// 
    internal static class NameValidationHelper 
    {
        // When a name string comes in programatically, validate it against the 
        //  same rules used by the XAML parser.  In XAML scenarios this is 
        //  technically redundant since the parser has already checked it against
        //  the same rules, but the parser is able to give a better error message 
        //  when it happens.
#if !PBTCOMPILER
        [FriendAccessAllowed] // Built into Base, used by Core and Framework.
        internal static bool NameValidationCallback(object candidateName) 
        {
            string name = candidateName as string; 
 
            if( name != null )
            { 
                // Non-null string, ask the XAML validation code for blessing.
                return IsValidIdentifierName(name);
            }
            else if( candidateName == null ) 
            {
                // Null string is allowed 
                return true; 
            }
            else 
            {
                // candiateName is not a string object.
                return false;
            } 
        }
#endif 
 
        /// 
        /// Validates the name to follow Naming guidelines 
        /// 
        /// string to validate
#if !PBTCOMPILER
        [FriendAccessAllowed] // Built into Base, used by Core and Framework. 
#endif
        internal static bool IsValidIdentifierName(string name) 
        { 
            // Grammar:
            //  ::=  (  |  )* 
            //  ::= [{Lu}{Ll}{Lt}{Lo}{Nl}('_')]
            //  ::= [{Mn}{Mc}{Lm}{Nd}]
            UnicodeCategory uc;
            for (int i = 0; i < name.Length; i++) 
            {
                uc = Char.GetUnicodeCategory(name[i]); 
                bool idStart = (uc == UnicodeCategory.UppercaseLetter || // (Lu) 
                             uc == UnicodeCategory.LowercaseLetter || // (Ll)
                             uc == UnicodeCategory.TitlecaseLetter || // (Lt) 
                             uc == UnicodeCategory.OtherLetter || // (Lo)
                             uc == UnicodeCategory.LetterNumber || // (Nl)
                             name[i] == '_');
                bool idExtend = (uc == UnicodeCategory.NonSpacingMark || // (Mn) 
                              uc == UnicodeCategory.SpacingCombiningMark || // (Mc)
                              uc == UnicodeCategory.ModifierLetter || // (Lm) 
                              uc == UnicodeCategory.DecimalDigitNumber); // (Nd) 
                if (i == 0)
                { 
                    if (!idStart)
                    {
                        return false;
                    } 
                }
                else if (!(idStart || idExtend)) 
                { 
                    return false;
                } 
            }
            return true;
        }
    } 
#endif
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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