public bool IsResourceDictionary(ElementNode node) => typeof(ResourceDictionary).IsAssignableFrom(Context.Types[node]);
public void Visit(ElementNode node, INode parentNode)
{
object value = null;
var type = XamlParser.GetElementType(node.XmlType, node, Context.RootElement?.GetType().GetTypeInfo().Assembly,
out XamlParseException xpe);
if (xpe != null)
{
if (Context.ExceptionHandler != null)
{
Context.ExceptionHandler(xpe);
return;
}
throw xpe;
}
Context.Types[node] = type;
if (IsXaml2009LanguagePrimitive(node))
{
value = CreateLanguagePrimitive(type, node);
}
else if (node.Properties.ContainsKey(XmlName.xArguments) || node.Properties.ContainsKey(XmlName.xFactoryMethod))
{
value = CreateFromFactory(type, node);
}
else if (
type.GetTypeInfo()
.DeclaredConstructors.Any(
ci =>
ci.IsPublic && ci.GetParameters().Length != 0 &&
ci.GetParameters().All(pi => pi.CustomAttributes.Any(attr => attr.AttributeType == typeof(ParameterAttribute)))) &&
ValidateCtorArguments(type, node, out string ctorargname))
{
value = CreateFromParameterizedConstructor(type, node);
}
else if (!type.GetTypeInfo().DeclaredConstructors.Any(ci => ci.IsPublic && ci.GetParameters().Length == 0) &&
!ValidateCtorArguments(type, node, out ctorargname))
{
throw new XamlParseException($"The Property {ctorargname} is required to create a {type.FullName} object.", node);
}
else
{
//this is a trick as the DataTemplate parameterless ctor is internal, and we can't CreateInstance(..., false) on WP7
try
{
if (type == typeof(DataTemplate))
{
value = new DataTemplate();
}
if (type == typeof(ControlTemplate))
{
value = new ControlTemplate();
}
if (value == null && node.CollectionItems.Any() && node.CollectionItems.First() is ValueNode)
{
var serviceProvider = new XamlServiceProvider(node, Context);
var converted = ((ValueNode)node.CollectionItems.First()).Value.ConvertTo(type, () => type.GetTypeInfo(),
serviceProvider, out Exception exception);
if (exception != null)
{
if (Context.ExceptionHandler != null)
{
Context.ExceptionHandler(exception);
return;
}
throw exception;
}
if (converted != null && converted.GetType() == type)
{
value = converted;
}
}
if (value == null)
{
value = Activator.CreateInstance(type);
}
}
catch (TargetInvocationException e) when(e.InnerException is XamlParseException || e.InnerException is XmlException)
{
throw e.InnerException;
}
catch (MissingMemberException mme)
{
throw new XamlParseException(mme.Message, node, mme);
}
}
Values[node] = value;
if (value is IMarkupExtension markup && (value is TypeExtension || value is StaticExtension || value is ArrayExtension))
{
var serviceProvider = new XamlServiceProvider(node, Context);
var visitor = new ApplyPropertiesVisitor(Context);
foreach (var cnode in node.Properties.Values.ToList())
{
cnode.Accept(visitor, node);
}
foreach (var cnode in node.CollectionItems)
{
cnode.Accept(visitor, node);
}
try
{
value = markup.ProvideValue(serviceProvider);
}
catch (Exception e)
{
var xamlpe = e as XamlParseException ?? new XamlParseException("Markup extension failed", serviceProvider, e);
if (Context.ExceptionHandler != null)
{
Context.ExceptionHandler(xamlpe);
}
else
{
throw xamlpe;
}
}
if (!node.Properties.TryGetValue(XmlName.xKey, out INode xKey))
{
xKey = null;
}
node.Properties.Clear();
node.CollectionItems.Clear();
if (xKey != null)
{
node.Properties.Add(XmlName.xKey, xKey);
}
Values[node] = value;
}
if (value is BindableObject bindableValue && node.NameScopeRef != (parentNode as IElementNode)?.NameScopeRef)
{
NameScope.SetNameScope(bindableValue, node.NameScopeRef.NameScope);
}
var assemblyName = (Context.RootAssembly ?? Context.RootElement?.GetType().GetTypeInfo().Assembly)?.GetName().Name;
if (assemblyName != null && value != null && !value.GetType().GetTypeInfo().IsValueType&& XamlFilePathAttribute.GetFilePathForObject(Context.RootElement) is string path)
{
Diagnostics.VisualDiagnostics.RegisterSourceInfo(value, new Uri($"{path};assembly={assemblyName}", UriKind.Relative), ((IXmlLineInfo)node).LineNumber, ((IXmlLineInfo)node).LinePosition);
}
}
static INode ReadNode(XmlReader reader, bool nested = false)
{
var skipFirstRead = nested;
Debug.Assert(reader.NodeType == XmlNodeType.Element);
var name = reader.Name;
var nodes = new List <INode>();
while (skipFirstRead || reader.Read())
{
skipFirstRead = false;
INode node;
switch (reader.NodeType)
{
case XmlNodeType.EndElement:
Debug.Assert(reader.Name == name);
if (nodes.Count == 0) //Empty element
{
return(null);
}
if (nodes.Count == 1)
{
return(nodes[0]);
}
return(new ListNode(nodes, (IXmlNamespaceResolver)reader, ((IXmlLineInfo)reader).LineNumber,
((IXmlLineInfo)reader).LinePosition));
case XmlNodeType.Element:
var isEmpty = reader.IsEmptyElement && reader.Name == name;
var elementName = reader.Name;
var elementNsUri = reader.NamespaceURI;
var elementXmlInfo = (IXmlLineInfo)reader;
IList <KeyValuePair <string, string> > xmlns;
var attributes = ParseXamlAttributes(reader, out xmlns);
var prefixes = PrefixesToIgnore(xmlns);
var typeArguments = GetTypeArguments(attributes);
node = new ElementNode(new XmlType(elementNsUri, elementName, typeArguments), elementNsUri,
reader as IXmlNamespaceResolver, elementXmlInfo.LineNumber, elementXmlInfo.LinePosition);
((IElementNode)node).Properties.AddRange(attributes);
(node.IgnorablePrefixes ?? (node.IgnorablePrefixes = new List <string>())).AddRange(prefixes);
ParseXamlElementFor((IElementNode)node, reader);
nodes.Add(node);
if (isEmpty || nested)
{
return(node);
}
break;
case XmlNodeType.Text:
case XmlNodeType.CDATA:
node = new ValueNode(reader.Value.Trim(), (IXmlNamespaceResolver)reader, ((IXmlLineInfo)reader).LineNumber,
((IXmlLineInfo)reader).LinePosition);
nodes.Add(node);
break;
case XmlNodeType.Whitespace:
break;
default:
Debug.WriteLine("Unhandled node {0} {1} {2}", reader.NodeType, reader.Name, reader.Value);
break;
}
}
throw new XamlParseException("Closing PropertyElement expected", (IXmlLineInfo)reader);
}
public void Visit(ElementNode node, INode parentNode)
{
if (node.XmlType.Name != nameof(OnPlatformExtension) || node.XmlType.NamespaceUri != XamlParser.MauiUri)
{
return;
}
if (string.IsNullOrEmpty(TargetFramework))
{
return;
}
string target = null;
#if NETSTANDARD2_0
if (TargetFramework.Contains("-android"))
#else
if (TargetFramework.Contains("-android", StringComparison.Ordinal))
#endif
{ target = nameof(OnPlatformExtension.Android); }
#if NETSTANDARD2_0
if (TargetFramework.Contains("-ios"))
#else
if (TargetFramework.Contains("-ios", StringComparison.Ordinal))
#endif
{ target = nameof(OnPlatformExtension.iOS); }
#if NETSTANDARD2_0
if (TargetFramework.Contains("-macos"))
#else
if (TargetFramework.Contains("-macos", StringComparison.Ordinal))
#endif
{ target = nameof(OnPlatformExtension.macOS); }
#if NETSTANDARD2_0
if (TargetFramework.Contains("-maccatalyst"))
#else
if (TargetFramework.Contains("-maccatalyst", StringComparison.Ordinal))
#endif
{ target = nameof(OnPlatformExtension.MacCatalyst); }
if (target is null)
{
return;
}
if (node.Properties.TryGetValue(new XmlName("", target), out INode targetNode) ||
node.Properties.TryGetValue(new XmlName("", nameof(OnPlatformExtension.Default)), out targetNode))
{
if (!ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out XmlName name))
{
return;
}
if (parentNode is IElementNode parentEnode)
{
parentEnode.Properties[name] = targetNode;
}
}
else //no prop for target and no Default set
{
if (!ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out XmlName name))
{
return;
}
//if there's no value for the targetPlatform, ignore the node.
//this is slightly different than what OnPlatform does (return default(T))
if (parentNode is IElementNode parentEnode)
{
parentEnode.Properties.Remove(name);
}
}
}
public bool IsResourceDictionary(ElementNode node) => false;
static bool IsVisualStateGroupList(ElementNode node) => node?.XmlType.Name == "VisualStateGroup" && node?.Parent is IListNode;
public void Visit(ElementNode node, INode parentNode) => action(node, parentNode);
