/// <summary>
/// Finds the specified property, or creates it if it doesn't exist.
/// </summary>
public XamlProperty FindOrCreateAttachedProperty(Type ownerType, string propertyName)
{
if (ownerType == null)
{
throw new ArgumentNullException("ownerType");
}
if (propertyName == null)
{
throw new ArgumentNullException("propertyName");
}
foreach (XamlProperty p in properties)
{
if (p.IsAttached && p.PropertyTargetType == ownerType && p.PropertyName == propertyName)
{
return(p);
}
}
XamlPropertyInfo info = XamlParser.TryFindAttachedProperty(ownerType, propertyName);
if (info == null)
{
throw new ArgumentException(
"The attached property '" + propertyName + "' doesn't exist on " + ownerType.FullName,
"propertyName");
}
XamlProperty newProperty = new XamlProperty(this, info);
properties.Add(newProperty);
return(newProperty);
}
internal static void ParseObjectAttribute(XamlObject obj, XmlAttribute attribute, bool real)
{
XamlPropertyInfo propertyInfo = GetPropertyInfo(obj.Instance, obj.ElementType, attribute,
obj.OwnerDocument.TypeFinder);
XamlPropertyValue value = null;
var valueText = attribute.Value;
if (valueText.StartsWith("{", StringComparison.Ordinal) &&
!valueText.StartsWith("{}", StringComparison.Ordinal))
{
var xamlObject = MarkupExtensionParser.Parse(valueText, obj, real ? attribute : null);
value = xamlObject;
}
else
{
if (real)
{
value = new XamlTextValue(obj.OwnerDocument, attribute);
}
else
{
value = new XamlTextValue(obj.OwnerDocument, valueText);
}
}
var property = new XamlProperty(obj, propertyInfo, value);
obj.AddProperty(property);
}
internal static XamlPropertyInfo GetPropertyInfo(XamlTypeFinder typeFinder, object elementInstance,
Type elementType, string xmlNamespace, string localName, bool tryFindAllProperties = false)
{
string typeName, propertyName;
SplitQualifiedIdentifier(localName, out typeName, out propertyName);
Type propertyType = FindType(typeFinder, xmlNamespace, typeName);
//Tries to Find All properties, even if they are not attached (For Setters, Bindings, ...)
if (tryFindAllProperties)
{
XamlPropertyInfo propertyInfo = null;
try
{
propertyInfo = FindProperty(elementInstance, propertyType, propertyName);
}
catch (Exception)
{
}
if (propertyInfo != null)
{
return(propertyInfo);
}
}
if (elementType.IsAssignableFrom(propertyType) || propertyType.IsAssignableFrom(elementType))
{
return(FindProperty(elementInstance, propertyType, propertyName));
}
else
{
// This is an attached property
return(FindAttachedProperty(propertyType, propertyName));
}
}
static bool IsElementChildACollectionForProperty(XamlTypeFinder typeFinder, XmlElement element,
XamlPropertyInfo propertyInfo)
{
var nodes = element.ChildNodes.Cast <XmlNode>().Where(x => !(x is XmlWhitespace)).ToList();
return(nodes.Count == 1 &&
propertyInfo.ReturnType.IsAssignableFrom(
FindType(typeFinder, nodes[0].NamespaceURI, nodes[0].LocalName)));
}
static XamlProperty FindExistingXamlProperty(XamlObject obj, XamlPropertyInfo propertyInfo)
{
foreach (XamlProperty existing in obj.Properties)
{
if (existing.propertyInfo.FullyQualifiedName == propertyInfo.FullyQualifiedName)
{
return(existing);
}
}
throw new XamlLoadException("Existing XamlProperty " + propertyInfo.FullyQualifiedName + " not found.");
}
// for use by parser only
internal XamlProperty(XamlObject parentObject, XamlPropertyInfo propertyInfo, XamlPropertyValue propertyValue)
: this(parentObject, propertyInfo)
{
PossiblyNameChanged(null, propertyValue);
this.propertyValue = propertyValue;
if (propertyValue != null)
{
propertyValue.ParentProperty = this;
}
UpdateValueOnInstance();
}
internal override object GetValueFor(XamlPropertyInfo targetProperty)
{
if (ParentProperty == null)
{
throw new InvalidOperationException("Cannot call GetValueFor while ParentProperty is null");
}
if (targetProperty == null)
{
return(this.Text);
}
return(XamlParser.CreateObjectFromAttributeText(Text, targetProperty, ParentProperty.ParentObject));
}
internal override object GetValueFor(XamlPropertyInfo targetProperty)
{
if (IsMarkupExtension)
{
var value = ProvideValue();
if (value is string && targetProperty != null && targetProperty.ReturnType != typeof(string))
{
return(XamlParser.CreateObjectFromAttributeText((string)value, targetProperty, this));
}
return(value);
}
else
{
return(instance);
}
}
static XamlPropertyInfo FindAttachedProperty(Type elementType, string propertyName)
{
XamlPropertyInfo pi = TryFindAttachedProperty(elementType, propertyName);
if (pi == null)
{
pi = TryFindAttachedEvent(elementType, propertyName);
}
if (pi != null)
{
return(pi);
}
else
{
throw new XamlLoadException("attached property " + elementType.Name + "." + propertyName +
" not found");
}
}
internal XamlProperty(XamlObject parentObject, XamlPropertyInfo propertyInfo)
{
this.parentObject = parentObject;
this.propertyInfo = propertyInfo;
if (propertyInfo.IsCollection)
{
isCollection = true;
collectionElements = new CollectionElementsCollection(this);
collectionElements.CollectionChanged += OnCollectionChanged;
if (propertyInfo.Name.Equals(XamlConstants.ResourcesPropertyName, StringComparison.Ordinal) &&
propertyInfo.ReturnType == typeof(ResourceDictionary))
{
isResources = true;
}
}
}
internal static XamlPropertyInfo FindProperty(object elementInstance, Type propertyType, string propertyName)
{
PropertyDescriptor propertyInfo = TypeDescriptor.GetProperties(propertyType)[propertyName];
if (propertyInfo == null && elementInstance != null)
{
propertyInfo = TypeDescriptor.GetProperties(elementInstance)
.OfType <DependencyPropertyDescriptor>()
.FirstOrDefault(x => x.IsAttached && x.Name == propertyName);
}
if (propertyInfo != null)
{
return(new XamlNormalPropertyInfo(propertyInfo));
}
else
{
XamlPropertyInfo pi = TryFindAttachedProperty(propertyType, propertyName);
if (pi != null)
{
return(pi);
}
}
EventDescriptorCollection events;
if (elementInstance != null)
{
events = TypeDescriptor.GetEvents(elementInstance);
}
else
{
events = TypeDescriptor.GetEvents(propertyType);
}
EventDescriptor eventInfo = events[propertyName];
if (eventInfo != null)
{
return(new XamlEventPropertyInfo(eventInfo));
}
throw new XamlLoadException("property " + propertyName + " not found");
}
internal static object CreateObjectFromAttributeText(string valueText, XamlPropertyInfo targetProperty,
XamlObject scope)
{
if (targetProperty.ReturnType == typeof(Uri))
{
return(scope.OwnerDocument.TypeFinder.ConvertUriToLocalUri(new Uri(valueText,
UriKind.RelativeOrAbsolute)));
}
else if (targetProperty.ReturnType == typeof(ImageSource))
{
var uri =
scope.OwnerDocument.TypeFinder.ConvertUriToLocalUri(new Uri(valueText, UriKind.RelativeOrAbsolute));
return(targetProperty.TypeConverter.ConvertFromString(
scope.OwnerDocument.GetTypeDescriptorContext(scope), CultureInfo.InvariantCulture, uri.ToString()));
}
return(targetProperty.TypeConverter.ConvertFromString(
scope.OwnerDocument.GetTypeDescriptorContext(scope),
CultureInfo.InvariantCulture, valueText));
}
protected override void InsertItem(int index, XamlPropertyValue item)
{
XamlPropertyInfo info = property.propertyInfo;
object collection = info.GetValue(property.ParentObject.Instance);
if (!CollectionSupport.TryInsert(info.ReturnType, collection, item, index))
{
CollectionSupport.AddToCollection(info.ReturnType, collection, item);
}
item.ParentProperty = property;
property.InsertNodeInCollection(item.GetNodeForCollection(), index);
base.InsertItem(index, item);
if (CollectionChanged != null)
{
CollectionChanged(this,
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item, index));
}
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value == null)
{
return(null);
}
if (value is string)
{
XamlTypeResolverProvider xamlTypeResolver =
(XamlTypeResolverProvider)context.GetService(typeof(XamlTypeResolverProvider));
if (xamlTypeResolver == null)
{
throw new XamlLoadException("XamlTypeResolverProvider not found in type descriptor context.");
}
XamlPropertyInfo prop = xamlTypeResolver.ResolveProperty((string)value);
if (prop == null)
{
throw new XamlLoadException("Could not find property " + value + ".");
}
XamlDependencyPropertyInfo depProp = prop as XamlDependencyPropertyInfo;
if (depProp != null)
{
return(depProp.DependencyProperty);
}
FieldInfo field = prop.TargetType.GetField(prop.Name + "Property",
BindingFlags.Public | BindingFlags.Static);
if (field != null && field.FieldType == typeof(DependencyProperty))
{
return((DependencyProperty)field.GetValue(null));
}
throw new XamlLoadException("Property " + value + " is not a dependency property.");
}
else
{
return(base.ConvertFrom(context, culture, value));
}
}
protected override void RemoveItem(int index)
{
XamlPropertyInfo info = property.propertyInfo;
object collection = info.GetValue(property.ParentObject.Instance);
if (!CollectionSupport.RemoveItemAt(info.ReturnType, collection, index))
{
var propertyValue = this[index];
CollectionSupport.RemoveItem(info.ReturnType, collection, propertyValue.GetValueFor(info),
propertyValue);
}
var item = this[index];
item.RemoveNodeFromParent();
item.ParentProperty = null;
base.RemoveItem(index);
if (CollectionChanged != null && !isClearing)
{
CollectionChanged(this,
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, index));
}
}
/// <summary> /// used internally by the XamlParser. /// </summary> internal abstract object GetValueFor(XamlPropertyInfo targetProperty);
void ParseObjectChildElementAsPropertyElement(XamlObject obj, XmlElement element,
XamlPropertyInfo defaultProperty)
{
Debug.Assert(element.LocalName.Contains("."));
// this is a element property syntax
XamlPropertyInfo propertyInfo = GetPropertyInfo(settings.TypeFinder, obj.Instance, obj.ElementType,
element.NamespaceURI, element.LocalName);
bool valueWasSet = false;
object collectionInstance = null;
bool isElementChildACollectionForProperty = false;
XamlProperty collectionProperty = null;
if (propertyInfo.IsCollection)
{
if (defaultProperty != null && defaultProperty.FullyQualifiedName == propertyInfo.FullyQualifiedName)
{
foreach (XamlProperty existing in obj.Properties)
{
if (existing.propertyInfo == defaultProperty)
{
collectionProperty = existing;
break;
}
}
}
if (collectionProperty == null)
{
obj.AddProperty(collectionProperty = new XamlProperty(obj, propertyInfo));
}
isElementChildACollectionForProperty =
IsElementChildACollectionForProperty(settings.TypeFinder, element, propertyInfo);
if (isElementChildACollectionForProperty)
{
collectionProperty.ParserSetPropertyElement((XmlElement)element.ChildNodes.Cast <XmlNode>()
.Where(x => !(x is XmlWhitespace))
.First());
}
else
{
collectionInstance = collectionProperty.propertyInfo.GetValue(obj.Instance);
collectionProperty.ParserSetPropertyElement(element);
collectionInstance = collectionInstance ??
Activator.CreateInstance(collectionProperty.propertyInfo.ReturnType);
}
}
XmlSpace oldXmlSpace = currentXmlSpace;
if (element.HasAttribute("xml:space"))
{
currentXmlSpace = (XmlSpace)Enum.Parse(typeof(XmlSpace), element.GetAttribute("xml:space"), true);
}
foreach (XmlNode childNode in element.ChildNodes)
{
currentParsedNode = childNode;
XamlPropertyValue childValue = ParseValue(childNode);
if (childValue != null)
{
if (propertyInfo.IsCollection)
{
if (isElementChildACollectionForProperty)
{
collectionProperty.PropertyValue = childValue;
}
else
{
CollectionSupport.AddToCollection(propertyInfo.ReturnType, collectionInstance, childValue);
collectionProperty.ParserAddCollectionElement(element, childValue);
}
}
else
{
if (valueWasSet)
{
throw new XamlLoadException("non-collection property may have only one child element");
}
valueWasSet = true;
XamlProperty xp = new XamlProperty(obj, propertyInfo, childValue);
xp.ParserSetPropertyElement(element);
obj.AddProperty(xp);
}
}
}
currentParsedNode = element;
currentXmlSpace = oldXmlSpace;
}
XamlObject ParseObject(XmlElement element)
{
Type elementType = settings.TypeFinder.GetType(element.NamespaceURI, element.LocalName);
if (typeof(FrameworkTemplate).IsAssignableFrom(elementType))
{
var xamlObj = new XamlObject(document, element, elementType,
TemplateHelper.GetFrameworkTemplate(element, currentXamlObject));
xamlObj.ParentObject = currentXamlObject;
return(xamlObj);
}
if (elementType == null)
{
elementType = settings.TypeFinder.GetType(element.NamespaceURI, element.LocalName + "Extension");
if (elementType == null)
{
throw new XamlLoadException("Cannot find type " + element.Name);
}
}
XmlSpace oldXmlSpace = currentXmlSpace;
XamlObject parentXamlObject = currentXamlObject;
if (element.HasAttribute("xml:space"))
{
currentXmlSpace = (XmlSpace)Enum.Parse(typeof(XmlSpace), element.GetAttribute("xml:space"), true);
}
XamlPropertyInfo defaultProperty = GetDefaultProperty(elementType);
XamlTextValue initializeFromTextValueInsteadOfConstructor = null;
if (defaultProperty == null)
{
int numberOfTextNodes = 0;
bool onlyTextNodes = true;
foreach (XmlNode childNode in element.ChildNodes)
{
if (childNode.NodeType == XmlNodeType.Text)
{
numberOfTextNodes++;
}
else if (childNode.NodeType == XmlNodeType.Element)
{
onlyTextNodes = false;
}
}
if (elementType == typeof(string) && numberOfTextNodes == 0)
{
initializeFromTextValueInsteadOfConstructor = new XamlTextValue(document, string.Empty);
}
else if (onlyTextNodes && numberOfTextNodes == 1)
{
foreach (XmlNode childNode in element.ChildNodes)
{
if (childNode.NodeType == XmlNodeType.Text)
{
currentParsedNode = childNode;
initializeFromTextValueInsteadOfConstructor = (XamlTextValue)ParseValue(childNode);
}
}
}
}
currentParsedNode = element;
object instance;
if (initializeFromTextValueInsteadOfConstructor != null)
{
instance = TypeDescriptor.GetConverter(elementType)
.ConvertFromString(
document.GetTypeDescriptorContext(null),
CultureInfo.InvariantCulture,
initializeFromTextValueInsteadOfConstructor.Text);
}
else
{
instance = settings.CreateInstanceCallback(elementType, emptyObjectArray);
}
XamlObject obj = new XamlObject(document, element, elementType, instance);
currentXamlObject = obj;
obj.ParentObject = parentXamlObject;
if (parentXamlObject == null && obj.Instance is DependencyObject)
{
NameScope.SetNameScope((DependencyObject)obj.Instance, new NameScope());
}
ISupportInitialize iSupportInitializeInstance = instance as ISupportInitialize;
if (iSupportInitializeInstance != null)
{
iSupportInitializeInstance.BeginInit();
}
foreach (XmlAttribute attribute in element.Attributes)
{
if (attribute.Value.StartsWith("clr-namespace", StringComparison.OrdinalIgnoreCase))
{
// the format is "clr-namespace:<Namespace here>;assembly=<Assembly name here>"
var clrNamespace = attribute.Value.Split(new[] { ':', ';', '=' });
if (clrNamespace.Length == 4)
{
// get the assembly name
var assembly = settings.TypeFinder.LoadAssembly(clrNamespace[3]);
if (assembly != null)
{
settings.TypeFinder.RegisterAssembly(assembly);
}
}
else
{
// if no assembly name is there, then load the assembly of the opened file.
var assembly = settings.TypeFinder.LoadAssembly(null);
if (assembly != null)
{
settings.TypeFinder.RegisterAssembly(assembly);
}
}
}
if (attribute.NamespaceURI == XamlConstants.XmlnsNamespace)
{
continue;
}
if (attribute.Name == "xml:space")
{
continue;
}
if (GetAttributeNamespace(attribute) == XamlConstants.XamlNamespace ||
GetAttributeNamespace(attribute) == XamlConstants.Xaml2009Namespace)
{
if (attribute.LocalName == "Name")
{
try
{
NameScopeHelper.NameChanged(obj, null, attribute.Value);
}
catch (Exception x)
{
ReportException(x, attribute);
}
}
continue;
}
ParseObjectAttribute(obj, attribute);
}
ParseObjectContent(obj, element, defaultProperty, initializeFromTextValueInsteadOfConstructor);
if (iSupportInitializeInstance != null)
{
iSupportInitializeInstance.EndInit();
}
currentXmlSpace = oldXmlSpace;
currentXamlObject = parentXamlObject;
return(obj);
}
void ParseObjectContent(XamlObject obj, XmlElement element, XamlPropertyInfo defaultProperty,
XamlTextValue initializeFromTextValueInsteadOfConstructor)
{
bool isDefaultValueSet = false;
XamlProperty collectionProperty = null;
object collectionInstance = null;
Type collectionType = null;
XmlElement collectionPropertyElement = null;
var elementChildNodes = GetNormalizedChildNodes(element);
if (defaultProperty == null && obj.Instance != null &&
CollectionSupport.IsCollectionType(obj.Instance.GetType()))
{
XamlObject parentObj = obj.ParentObject;
var parentElement = element.ParentNode;
XamlPropertyInfo propertyInfo;
if (parentObj != null)
{
propertyInfo = GetPropertyInfo(settings.TypeFinder, parentObj.Instance, parentObj.ElementType,
parentElement.NamespaceURI, parentElement.LocalName);
collectionProperty = FindExistingXamlProperty(parentObj, propertyInfo);
}
collectionInstance = obj.Instance;
collectionType = obj.ElementType;
collectionPropertyElement = element;
}
else if (defaultProperty != null && defaultProperty.IsCollection && !element.IsEmpty)
{
foreach (XmlNode childNode in elementChildNodes)
{
currentParsedNode = childNode;
XmlElement childElement = childNode as XmlElement;
if (childElement == null || !ObjectChildElementIsPropertyElement(childElement))
{
obj.AddProperty(collectionProperty = new XamlProperty(obj, defaultProperty));
collectionType = defaultProperty.ReturnType;
collectionInstance = defaultProperty.GetValue(obj.Instance);
break;
}
}
}
currentParsedNode = element;
if (collectionType != null && collectionInstance == null && elementChildNodes.Count() == 1)
{
var firstChild = elementChildNodes.First() as XmlElement;
if (ObjectChildElementIsCollectionInstance(firstChild, collectionType))
{
collectionInstance = ParseObject(firstChild);
collectionProperty.PropertyValue = (XamlPropertyValue)collectionInstance;
}
else
{
throw new XamlLoadException("Collection Instance is null");
}
}
else
{
foreach (XmlNode childNode in elementChildNodes)
{
currentParsedNode = childNode;
XmlElement childElement = childNode as XmlElement;
if (childElement != null)
{
if (childElement.NamespaceURI == XamlConstants.XamlNamespace)
{
continue;
}
if (ObjectChildElementIsPropertyElement(childElement))
{
ParseObjectChildElementAsPropertyElement(obj, childElement, defaultProperty);
continue;
}
}
if (initializeFromTextValueInsteadOfConstructor != null)
{
continue;
}
XamlPropertyValue childValue = ParseValue(childNode);
if (childValue != null)
{
if (collectionProperty != null)
{
collectionProperty.ParserAddCollectionElement(collectionPropertyElement, childValue);
CollectionSupport.AddToCollection(collectionType, collectionInstance, childValue);
}
else if (collectionProperty == null && collectionInstance is ResourceDictionary)
{
CollectionSupport.AddToCollection(collectionType, collectionInstance, childValue);
}
else
{
if (defaultProperty == null)
{
throw new XamlLoadException(
"This element does not have a default value, cannot assign to it");
}
if (isDefaultValueSet)
{
throw new XamlLoadException("default property may have only one value assigned");
}
obj.AddProperty(new XamlProperty(obj, defaultProperty, childValue));
isDefaultValueSet = true;
}
}
}
}
currentParsedNode = element;
}
