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ReferenceExtension.cs
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ReferenceExtension.cs
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/*
* Copyright(c) 2021 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
using System;
using System.ComponentModel;
using Tizen.NUI.Binding.Internals;
using Tizen.NUI.Binding;
namespace Tizen.NUI.Xaml
{
/// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
[EditorBrowsable(EditorBrowsableState.Never)]
[ContentProperty("Name")]
public class ReferenceExtension : IMarkupExtension
{
/// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
[EditorBrowsable(EditorBrowsableState.Never)]
public string Name { get; set; }
/// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
[EditorBrowsable(EditorBrowsableState.Never)]
public object ProvideValue(IServiceProvider serviceProvider)
{
if (serviceProvider == null)
throw new ArgumentNullException(nameof(serviceProvider));
var valueProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideParentValues;
if (valueProvider == null)
throw new ArgumentException("serviceProvider does not provide an IProvideValueTarget");
var namescopeprovider = serviceProvider.GetService(typeof(INameScopeProvider)) as INameScopeProvider;
if (namescopeprovider != null && namescopeprovider.NameScope != null)
{
var value = namescopeprovider.NameScope.FindByName(Name);
if (value != null)
return value;
}
foreach (var target in valueProvider.ParentObjects)
{
var bo = target as BindableObject;
if (bo == null)
continue;
var ns = NameScope.GetNameScope(bo) as INameScope;
if (ns == null)
continue;
var value = ns.FindByName(Name);
if (value != null)
return value;
}
//foreach (var target in valueProvider.ParentObjects)
//{
// var ns = target as INameScope;
// if (ns == null)
// continue;
// var value = ns.FindByName(Name);
// if (value != null)
// return value;
//}
var lineInfo = (serviceProvider?.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider)?.XmlLineInfo ?? new XmlLineInfo();
throw new XamlParseException($"Can not find the object referenced by `{Name}`", lineInfo);
}
}
}