80 lines
2.9 KiB
C#
80 lines
2.9 KiB
C#
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//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace Microsoft.VisualBasic.Activities.XamlIntegration
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{
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using System;
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using System.ComponentModel;
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using System.Runtime;
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using System.Globalization;
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using System.Activities;
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// this class is necessary in order for our value serializer to get called by XAML,
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// even though the functionality is a no-op
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public sealed class VisualBasicSettingsConverter : TypeConverter
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{
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public VisualBasicSettingsConverter()
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: base()
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{
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}
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
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{
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if (sourceType == TypeHelper.StringType)
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{
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return true;
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}
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return base.CanConvertFrom(context, sourceType);
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}
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public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
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{
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if (destinationType == TypeHelper.StringType)
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{
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return false;
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}
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return base.CanConvertTo(context, destinationType);
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}
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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string sourceString = value as string;
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if (sourceString != null)
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{
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if (sourceString.Equals(VisualBasicSettingsValueSerializer.ImplementationVisualBasicSettingsValue))
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{
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// this is the VBSettings for the internal implementation
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// suppress its Xaml serialization
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VisualBasicSettings settings = CollectXmlNamespacesAndAssemblies(context);
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if (settings != null)
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{
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settings.SuppressXamlSerialization = true;
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}
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return settings;
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}
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if (!(sourceString.Equals(String.Empty) || sourceString.Equals(VisualBasicSettingsValueSerializer.VisualBasicSettingsValue)))
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{
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throw FxTrace.Exception.AsError(new InvalidOperationException(SR.InvalidVisualBasicSettingsValue));
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}
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return CollectXmlNamespacesAndAssemblies(context);
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}
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return base.ConvertFrom(context, culture, value);
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}
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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return base.ConvertTo(context, culture, value, destinationType);
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}
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VisualBasicSettings CollectXmlNamespacesAndAssemblies(ITypeDescriptorContext context)
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{
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return VisualBasicExpressionConverter.CollectXmlNamespacesAndAssemblies(context);
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}
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}
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}
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