Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/FontNamesConverter.cs

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+//------------------------------------------------------------------------------
+// <copyright file="FontNamesConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System.ComponentModel.Design;
+    using System;
+    using System.ComponentModel;
+    using System.Collections;    
+    using System.Globalization;
+
+    /// <devdoc>
+    ///   Converts a string with font names separated by commas to and from 
+    ///   an array of strings containing individual names.
+    /// </devdoc>
+    public class FontNamesConverter : TypeConverter {
+
+
+        /// <devdoc>
+        ///   Determines if the specified data type can be converted to an array of strings
+        ///   containing individual font names.
+        /// </devdoc>
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+            return false;
+        }
+
+
+        /// <devdoc>
+        ///   Parses a string that represents a list of font names separated by 
+        ///   commas into an array of strings containing individual font names.
+        /// </devdoc>
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
+            if (value is string) {
+                if (((string)value).Length == 0) {
+                    return new string[0];
+                }
+                
+                string[] names = ((string)value).Split(new char[] { culture.TextInfo.ListSeparator[0] });
+                for (int i = 0; i < names.Length; i++) {
+                    names[i] = names[i].Trim();
+                }
+                return names;
+            }
+            throw GetConvertFromException(value);
+        }
+
+
+        /// <devdoc>
+        ///   Creates a string that represents a list of font names separated 
+        ///   by commas from an array of strings containing individual font names.
+        /// </devdoc>
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
+            if (destinationType == typeof(string)) {
+                
+                if (value == null) {
+                    return String.Empty;
+                }
+                return string.Join(culture.TextInfo.ListSeparator, ((string[])value));
+            }
+            throw GetConvertToException(value, destinationType);
+        }
+    }
+}