/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
/// <param name="visitor">The visitor to visit this node with.</param>
protected override void AcceptInternal(IExpressionVisitor visitor)
{
if (RelativeSourceExpression != null)
{
_relativeSourceExpression = AcceptWithCheck(visitor, RelativeSourceExpression, true);
}
}
public static IObserver CreateBindingSource(IRelativeSourceExpressionNode node, IDataContext context, [NotNull] object target, string pathEx)
{
if (target == null)
{
throw BindingExceptionManager.InvalidBindingTarget(node.Path);
}
string path = node.Path ?? String.Empty;
if (!string.IsNullOrEmpty(pathEx))
{
path = MergePath(path, pathEx);
}
if (node.Type != RelativeSourceExpressionNode.SelfType)
{
if (node.Type == RelativeSourceExpressionNode.ContextSourceType)
{
target = BindingServiceProvider.ContextManager.GetBindingContext(target);
}
else
{
target = new ParentSourceValue(target, node);
}
}
return(CreateBindingSource(context, path, target, false));
}
public BindingMemberExpressionNode([NotNull] IRelativeSourceExpressionNode relativeSource,
[NotNull] string paramName, int index)
: this(paramName, index)
{
Should.NotBeNull(relativeSource, nameof(relativeSource));
_relativeSourceExpression = relativeSource;
_path = relativeSource.Path;
}
/// <summary>
/// Initializes a new instance of the <see cref="BindingMemberExpressionNode" /> class.
/// </summary>
public BindingMemberExpressionNode([NotNull] IRelativeSourceExpressionNode relativeSource,
[NotNull] string paramName, int index)
: this(paramName, index)
{
Should.NotBeNull(relativeSource, "relativeSource");
_relativeSourceExpression = relativeSource;
_path = relativeSource.Path;
}
public ParentSourceValue(object target, IRelativeSourceExpressionNode node)
{
_node = node;
_isElementSource = _node.Type == RelativeSourceExpressionNode.ElementSourceType;
_targetReference = ServiceProvider.WeakReferenceFactory(target, true);
_value = Empty.WeakReference;
var rootMember = BindingServiceProvider.VisualTreeManager.GetRootMember(target.GetType());
if (rootMember != null)
{
_subscriber = rootMember.TryObserve(target, this);
}
TryHandle(null, null);
}
protected override void AcceptInternal(IExpressionVisitor visitor)
{
if (RelativeSourceExpression != null)
_relativeSourceExpression = AcceptWithCheck(visitor, RelativeSourceExpression, true);
}
private IExpressionNode VisitRelativeSource(IRelativeSourceExpressionNode rs)
{
string memberName = rs.Type + rs.Path + rs.Level.ToString() + rs.ElementName;
return(GetOrAddBindingMember(memberName, (s, i) => new BindingMemberExpressionNode(rs, s, i)));
}
/// <summary>
/// Initializes a new instance of the <see cref="RelativeSourceBehavior" /> class.
/// </summary>
public RelativeSourceBehavior(IRelativeSourceExpressionNode relativeSource)
{
_id = Guid.NewGuid();
_relativeSourceNode = relativeSource;
}
private IExpressionNode VisitRelativeSource(IRelativeSourceExpressionNode rs)
{
string memberName = rs.Type + rs.Path + rs.Level.ToString() + rs.ElementName;
return GetOrAddBindingMember(memberName, (s, i) => new BindingMemberExpressionNode(rs, s, i));
}
