Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebControls/HorizontalAlignConverter.cs

@@ -0,0 +1,91 @@
+//------------------------------------------------------------------------------
+// <copyright file="HorizontalAlignConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+// 
+
+
+
+
+
+
+
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Globalization;
+
+    internal class HorizontalAlignConverter : EnumConverter {
+
+        static string[] stringValues = new String[(int) HorizontalAlign.Justify + 1];
+
+        static HorizontalAlignConverter () { 
+            stringValues[(int) HorizontalAlign.NotSet] = "NotSet";
+            stringValues[(int) HorizontalAlign.Left] = "Left";
+            stringValues[(int) HorizontalAlign.Center] = "Center";
+            stringValues[(int) HorizontalAlign.Right] = "Right";
+            stringValues[(int) HorizontalAlign.Justify] = "Justify";
+        }
+
+        // this constructor needs to be public despite the fact that it's in an internal
+        // class so it can be created by Activator.CreateInstance.
+        public HorizontalAlignConverter () : base(typeof(HorizontalAlign)) {}
+        
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+            else {
+                return base.CanConvertFrom(context, sourceType);
+            }
+        }
+
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
+            if (value == null)
+                return null;
+
+            if (value is string) {
+                string textValue = ((string)value).Trim();
+                if (textValue.Length == 0)
+                    return HorizontalAlign.NotSet;
+
+                switch (textValue) {
+                    case "NotSet":
+                        return HorizontalAlign.NotSet;
+                    case "Left":
+                        return HorizontalAlign.Left;
+                    case "Center":
+                        return HorizontalAlign.Center;
+                    case "Right":
+                        return HorizontalAlign.Right;
+                    case "Justify":
+                        return HorizontalAlign.Justify;
+                }
+            }
+            return base.ConvertFrom(context, culture, value);
+        }
+        
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+
+            return base.CanConvertTo(context, sourceType);
+        }
+        
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
+            if (destinationType == typeof(string) && ((int) value <= (int)HorizontalAlign.Justify)) {
+                return stringValues[(int) value];
+            }
+
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+    }
+}
+
+