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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// Contents: Value serializer for the RoutedEvent class
//
using System.Runtime.CompilerServices;
namespace System.Windows.Markup
{
internal class RoutedEventValueSerializer: ValueSerializer
{
public override bool CanConvertToString(object value, IValueSerializerContext context)
{
return ValueSerializer.GetSerializerFor(typeof(Type), context) != null;
}
public override bool CanConvertFromString(string value, IValueSerializerContext context)
{
return ValueSerializer.GetSerializerFor(typeof(Type), context) != null;
}
public override string ConvertToString(object value, IValueSerializerContext context)
{
RoutedEvent routedEvent = value as RoutedEvent;
if (routedEvent != null)
{
ValueSerializer typeSerializer = ValueSerializer.GetSerializerFor(typeof(Type), context);
if (typeSerializer != null)
{
return $"{typeSerializer.ConvertToString(routedEvent.OwnerType, context)}.{routedEvent.Name}";
}
}
return base.ConvertToString(value, context);
}
static Dictionary<Type, Type> initializedTypes = new Dictionary<Type, Type>();
static void ForceTypeConstructors(Type currentType)
{
// Force load the Statics by walking up the hierarchy and running class constructors
while (currentType != null && !initializedTypes.ContainsKey(currentType))
{
RuntimeHelpers.RunClassConstructor(currentType.TypeHandle);
initializedTypes[currentType] = currentType;
currentType = currentType.BaseType;
}
}
public override object ConvertFromString(string value, IValueSerializerContext context)
{
ValueSerializer typeSerializer = ValueSerializer.GetSerializerFor(typeof(Type), context);
if (typeSerializer != null)
{
int index = value.IndexOf('.');
if (index > 0)
{
Type type = typeSerializer.ConvertFromString(value.Substring(0, index), context) as Type;
string name = value.Substring(index + 1).Trim();
ForceTypeConstructors(type);
return EventManager.GetRoutedEventFromName(name, type);
}
}
return base.ConvertFromString(value, context);
}
}
}
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