public void Visit(ElementNode node, INode parentNode)
{
if (!Values.TryGetValue(node, out var value) && Context.ExceptionHandler != null)
{
return;
}
//Set RD to VE
if (typeof(ResourceDictionary).IsAssignableFrom(Context.Types[node]) && ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out XmlName propertyName))
{
if ((propertyName.LocalName == "Resources" ||
propertyName.LocalName.EndsWith(".Resources", StringComparison.Ordinal)) && value is ResourceDictionary)
{
var source = Values[parentNode];
ApplyPropertiesVisitor.SetPropertyValue(source, propertyName, value, Context.RootElement, node, Context, node);
return;
}
}
//Only proceed further if the node is a keyless RD
if (parentNode is IElementNode &&
Context.Types.TryGetValue((IElementNode)parentNode, out var parentType) &&
typeof(ResourceDictionary).IsAssignableFrom(parentType) &&
!((IElementNode)parentNode).Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new ApplyPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
}
else if (parentNode is ListNode &&
typeof(ResourceDictionary).IsAssignableFrom(Context.Types[((IElementNode)parentNode.Parent)]) &&
!((IElementNode)parentNode.Parent).Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new ApplyPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
}
}
public void Visit(ListNode node, INode parentNode)
{
//this is a gross hack to keep ListNode alive. ListNode must go in favor of Properties
if (ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out XmlName name))
{
node.XmlName = name;
}
}
private void SetPropertyValue(string prop, string strValue, object value, IServiceProvider serviceProvider)
{
MethodInfo setter;
if (prop == null)
{
//implicit property
var t = markupExtension.GetType();
prop = ApplyPropertiesVisitor.GetContentPropertyName(t.GetTypeInfo());
if (prop == null)
{
return;
}
try {
setter = t.GetRuntimeProperty(prop).SetMethod;
}
catch (AmbiguousMatchException e) {
throw new XamlParseException($"Multiple properties with name '{t}.{prop}' found.", serviceProvider, innerException: e);
}
}
else
{
try {
setter = markupExtension.GetType().GetRuntimeProperty(prop).SetMethod;
}
catch (AmbiguousMatchException e) {
throw new XamlParseException($"Multiple properties with name '{markupExtension.GetType()}.{prop}' found.", serviceProvider, innerException: e);
}
}
if (value == null && strValue != null)
{
try {
value = strValue.ConvertTo(markupExtension.GetType().GetRuntimeProperty(prop).PropertyType,
(Func <TypeConverter>)null, serviceProvider, out Exception converterException);
if (converterException != null)
{
throw converterException;
}
}
catch (AmbiguousMatchException e) {
throw new XamlParseException($"Multiple properties with name '{markupExtension.GetType()}.{prop}' found.", serviceProvider, innerException: e);
}
}
setter.Invoke(markupExtension, new[] { value });
}
public void Visit(ElementNode node, INode parentNode)
{
object value = null;
var type = XamlParser.GetElementType(node.XmlType, node, Context.RootElement?.GetType().GetTypeInfo().Assembly,
out XamlParseException xpe);
if (xpe != null)
{
if (Context.ExceptionHandler != null)
{
Context.ExceptionHandler(xpe);
return;
}
throw xpe;
}
Context.Types[node] = type;
if (IsXaml2009LanguagePrimitive(node))
{
value = CreateLanguagePrimitive(type, node);
}
else if (node.Properties.ContainsKey(XmlName.xArguments) || node.Properties.ContainsKey(XmlName.xFactoryMethod))
{
value = CreateFromFactory(type, node);
}
else if (
type.GetTypeInfo()
.DeclaredConstructors.Any(
ci =>
ci.IsPublic && ci.GetParameters().Length != 0 &&
ci.GetParameters().All(pi => pi.CustomAttributes.Any(attr => attr.AttributeType == typeof(ParameterAttribute)))) &&
ValidateCtorArguments(type, node, out string ctorargname))
{
value = CreateFromParameterizedConstructor(type, node);
}
else if (!type.GetTypeInfo().DeclaredConstructors.Any(ci => ci.IsPublic && ci.GetParameters().Length == 0) &&
!ValidateCtorArguments(type, node, out ctorargname))
{
throw new XamlParseException($"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)
{
try {
value = Activator.CreateInstance(type);
}
catch (Exception e) when(e is TargetInvocationException || e is MemberAccessException)
{
value = XamlLoader.InstantiationFailedCallback?.Invoke(new XamlLoader.CallbackTypeInfo {
XmlNamespace = node.XmlType.NamespaceUri, XmlTypeName = node.XmlType.Name
}, type, e) ?? throw e;
}
}
}
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);
}
if (XamlLoader.ValueCreatedCallback != null)
{
var name = node.XmlType.Name;
if (name.Contains(":"))
{
name = name.Substring(name.LastIndexOf(':') + 1);
}
XamlLoader.ValueCreatedCallback(new XamlLoader.CallbackTypeInfo {
XmlNamespace = node.XmlType.NamespaceUri, XmlTypeName = name
}, value);
}
}
