TypeNameHelper.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 / ndp / cdf / src / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / TypeNameHelper.cs / 1305376 / TypeNameHelper.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Activities.Presentation 
{
    using System; 
    using System.Globalization; 
    using System.Text;
    using System.Text.RegularExpressions; 

    internal static class TypeNameHelper
    {
        // note: does not work for nested type when fullName is false 
        public static string GetDisplayName(Type type, bool fullName)
        { 
            if (type == null) 
            {
                return string.Empty; 
            }

            if (type.IsGenericParameter)
            { 
                return type.Name;
            } 
 
            if (!type.IsGenericType && !type.IsArray)
            { 
                if (fullName)
                {
                    return type.FullName;
                } 
                else
                { 
                    return type.Name; 
                }
            } 

            // replace `2 with 
            Regex regex = new Regex("`[0-9]+");
            GenericsMatchEvaluator evaluator = new GenericsMatchEvaluator(type.GetGenericArguments(), fullName); 

            // Remove [[fullName1, ..., fullNameX]] 
            string name; 
            if (fullName)
            { 
                name = type.FullName;
            }
            else
            { 
                name = type.Name;
            } 
            int start = name.IndexOf("[[", StringComparison.Ordinal); 
            int end = name.LastIndexOf("]]", StringComparison.Ordinal);
            if (start > 0 && end > 0) 
            {
                name = name.Substring(0, start) + name.Substring(end + 2);
            }
            return regex.Replace(name, evaluator.Evaluate); 
        }
 
        class GenericsMatchEvaluator 
        {
            Type[] generics = null; 
            int index;
            bool fullName;

            public GenericsMatchEvaluator(Type[] generics, bool fullName) 
            {
                this.generics = generics; 
                this.index = 0; 
                this.fullName = fullName;
            } 

            public string Evaluate(Match match)
            {
                int numberOfParameters = int.Parse(match.Value.Substring(1), CultureInfo.InvariantCulture); 

                StringBuilder sb = new StringBuilder(); 
 
                // matched "`N" is replaced by ""
                sb.Append("<"); 

                for (int i = 0; i < numberOfParameters; i++)
                {
                    if (i > 0) 
                    {
                        sb.Append(", "); 
                    } 

                    sb.Append(TypeNameHelper.GetDisplayName(this.generics[this.index++], fullName)); 
                }

                sb.Append(">");
 
                return sb.ToString();
            } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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