private IExpressionNode VisitExpression(IExpressionNode node)
{
var nodes = new List <IExpressionNode>();
string memberName = node.TryGetMemberName(true, true, nodes);
if (memberName == null)
{
_isMulti = true;
return(node);
}
if (nodes[0] is ResourceExpressionNode)
{
return(GetResourceMember(node, memberName, nodes));
}
IBindingPath path = BindingServiceProvider.BindingPathFactory(memberName);
if (path.IsEmpty)
{
return(GetOrAddBindingMember(memberName, (s, i) => new BindingMemberExpressionNode(memberName, s, i)));
}
string firstMember = path.Parts[0];
if (_lamdaParameters.Contains(firstMember))
{
return(node);
}
return(GetOrAddBindingMember(memberName, (s, i) => new BindingMemberExpressionNode(memberName, s, i)));
}
public BindingContextSource(object source, IBindingMemberInfo member)
{
_member = member;
_observer = BindingServiceProvider
.ObserverProvider
.Observe(source, BindingServiceProvider.BindingPathFactory(member.Path), true, DataContext.Empty);
_observer.ValueChanged += ObserverOnValueChanged;
}
private IExpressionNode GetResourceMember(IExpressionNode node, string memberName, IList <IExpressionNode> nodes)
{
IExpressionNode staticValue;
if (_staticNodes.TryGetValue(node, out staticValue))
{
return(staticValue);
}
IBindingPath path = BindingServiceProvider.BindingPathFactory(memberName);
string firstMember = path.Parts[0];
Type type = BindingServiceProvider.ResourceResolver.ResolveType(firstMember, Context, false);
var resourceMember = (ResourceExpressionNode)nodes[0];
if (resourceMember.Dynamic && type == null)
{
memberName = BindingExtensions.MergePath(path.Parts.Skip(1).ToArray());
return(GetOrAddBindingMember("$" + path.Path, (s, i) => new BindingMemberExpressionNode(firstMember, memberName, s, i)));
}
bool dynamicMember = false;
IExpressionNode firstMemberNode = nodes[1];
if (!_staticNodes.TryGetValue(firstMemberNode, out staticValue))
{
if (type == null)
{
var value = BindingServiceProvider
.ResourceResolver
.ResolveObject(firstMember, Context, true)
.Value;
var dynamicObject = value as IDynamicObject;
if (dynamicObject == null || path.Parts.Count <= 1)
{
staticValue = new ConstantExpressionNode(value);
}
else
{
staticValue = new ConstantExpressionNode(dynamicObject.GetMember(path.Parts[1], Empty.Array <object>()));
dynamicMember = true;
}
}
else
{
staticValue = new ConstantExpressionNode(type, typeof(Type));
}
_staticNodes[firstMemberNode] = staticValue;
if (dynamicMember)
{
_staticNodes[nodes[2]] = staticValue;
}
}
if (firstMemberNode == node || (dynamicMember && node == nodes[2]))
{
return(staticValue);
}
return(node);
}