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using System;
using System.Collections.Generic;
using System.Xml;
using Xamarin.Forms.Xaml;
namespace Xamarin.Forms.Internals
{
public class NameScope : INameScope
{
public static readonly BindableProperty NameScopeProperty = BindableProperty.CreateAttached("NameScope", typeof(INameScope), typeof(NameScope), default(INameScope));
readonly Dictionary<string, object> _names = new Dictionary<string, object>();
object INameScope.FindByName(string name)
{
if (_names.ContainsKey(name))
return _names[name];
return null;
}
void INameScope.RegisterName(string name, object scopedElement)
{
if (_names.ContainsKey(name))
throw new ArgumentException("An element with the same key already exists in NameScope", "name");
_names[name] = scopedElement;
}
void INameScope.RegisterName(string name, object scopedElement, IXmlLineInfo xmlLineInfo)
{
try
{
((INameScope)this).RegisterName(name, scopedElement);
}
catch (ArgumentException)
{
throw new XamlParseException(string.Format("An element with the name \"{0}\" already exists in this NameScope", name), xmlLineInfo);
}
}
void INameScope.UnregisterName(string name)
{
_names.Remove(name);
}
public static INameScope GetNameScope(BindableObject bindable)
{
return (INameScope)bindable.GetValue(NameScopeProperty);
}
public static void SetNameScope(BindableObject bindable, INameScope value)
{
bindable.SetValue(NameScopeProperty, value);
}
}
}
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