protected override object GetRawValueInternal(IBindingMemberInfo targetMember, IDataContext context,
bool throwOnError)
{
IBindingPathMembers members = _bindingSource.GetPathMembers(throwOnError);
return(members.LastMember.GetValue(members.PenultimateValue, null));
}
protected override object GetRawValueInternal(IBindingMemberInfo targetMember, IDataContext context,
bool throwOnError)
{
IBindingPathMembers members = _bindingSource.GetPathMembers(throwOnError);
var value = members.GetLastMemberValue();
if (members.Path.IsDebuggable)
{
DebugInfo($"Binding got a raw value: '{value}', for path: '{members.Path}'", new[] { value, members });
}
return(value);
}
private void TrySubscribe(IObserver source)
{
var pathMembers = source.GetPathMembers(false);
if (IsDirectSource)
{
if (!pathMembers.AllMembersAvailable)
{
return;
}
var value = pathMembers.GetLastMemberValue();
if (!ReferenceEquals(value, BindingConstants.ErrorsSourceValue))
{
return;
}
}
var dataErrorInfo = pathMembers.PenultimateValue as INotifyDataErrorInfo;
if (dataErrorInfo == null)
{
return;
}
var subscriber = BindingServiceProvider.WeakEventManager.TrySubscribe(dataErrorInfo, ErrorsChangedEvent, this);
if (subscriber != null)
{
_subscribers.Add(subscriber);
}
}
private void SetDefaultValue(IObserver source)
{
var pathMembers = source.GetPathMembers(false);
if (pathMembers.AllMembersAvailable)
{
object value = _value;
if (!pathMembers.LastMember.Type.IsInstanceOfType(value))
value = pathMembers.LastMember.Type.GetDefaultValue();
pathMembers.LastMember.SetValue(pathMembers.PenultimateValue, new[] { value });
}
}
private static bool IsAllMembersAvailable(this IObserver observer, bool checkLastMember)
{
var pathMembers = observer.GetPathMembers(false);
if (!pathMembers.AllMembersAvailable)
{
return(false);
}
if (checkLastMember && pathMembers.LastMember.CanRead)
{
return(!pathMembers.LastMember.GetValue(pathMembers.PenultimateValue, Empty.Array <object>()).IsUnsetValue());
}
return(true);
}
private void SetDefaultValue(IObserver source)
{
var pathMembers = source.GetPathMembers(false);
if (pathMembers.AllMembersAvailable)
{
object value = _value;
if (!pathMembers.LastMember.Type.IsInstanceOfType(value))
{
value = pathMembers.LastMember.Type.GetDefaultValue();
}
pathMembers.LastMember.SetSingleValue(pathMembers.PenultimateValue, value);
}
}
private void TrySubscribe(IObserver source)
{
var dataErrorInfo = source.GetPathMembers(false).PenultimateValue as INotifyDataErrorInfo;
if (dataErrorInfo == null)
{
return;
}
var subscriber = BindingServiceProvider.WeakEventManager.TrySubscribe(dataErrorInfo, ErrorsChangedEvent, this);
if (subscriber != null)
{
_subscribers.Add(subscriber);
}
}
internal static object GetCurrentValue(this IObserver source)
{
IBindingPathMembers pathMembers = source.GetPathMembers(true);
object value = pathMembers.LastMember.GetValue(pathMembers.PenultimateValue, null);
if (value.IsUnsetValue())
{
return(null);
}
var actionValue = value as BindingActionValue;
if (actionValue == null)
{
return(value);
}
return(actionValue.GetValue(null));
}
private void CollectErrors(ref List <object> errors, IObserver bindingSource)
{
var pathMembers = bindingSource.GetPathMembers(false);
if (IsDirectSource)
{
if (!pathMembers.AllMembersAvailable)
{
return;
}
var value = pathMembers.GetLastMemberValue();
if (!ReferenceEquals(value, BindingConstants.ErrorsSourceValue))
{
return;
}
}
var notifyDataErrorInfo = pathMembers.PenultimateValue as INotifyDataErrorInfo;
if (notifyDataErrorInfo == null)
{
return;
}
var path = bindingSource.Path.Parts.LastOrDefault();
if (!IsDirectSource)
{
CollectErrors(notifyDataErrorInfo, path, ref errors);
}
var paths = ErrorPaths;
if (paths == null || paths.Length == 0)
{
if (IsDirectSource)
{
CollectErrors(notifyDataErrorInfo, string.Empty, ref errors);
}
return;
}
for (int i = 0; i < paths.Length; i++)
{
CollectErrors(notifyDataErrorInfo, paths[i], ref errors);
}
}
private void CollectErrors(ref List <object> errors, IObserver bindingSource)
{
var notifyDataErrorInfo = bindingSource.GetPathMembers(false).PenultimateValue as INotifyDataErrorInfo;
if (notifyDataErrorInfo == null)
{
return;
}
var path = bindingSource.Path.Parts.LastOrDefault();
var paths = ErrorPaths;
if (!string.IsNullOrEmpty(path) || paths == null || paths.Length == 0)
{
CollectErrors(notifyDataErrorInfo, path, ref errors);
}
if (paths != null)
{
for (int i = 0; i < paths.Length; i++)
{
CollectErrors(notifyDataErrorInfo, paths[i], ref errors);
}
}
}
/// <summary>
/// Gets the source object include the path members.
/// </summary>
/// <param name="throwOnError">
/// true to throw an exception if the source is not valid.
/// </param>
public IBindingPathMembers GetPathMembers(bool throwOnError)
{
return(_observer.GetPathMembers(throwOnError));
}
private void CollectErrors(ref List<object> errors, IObserver bindingSource)
{
var notifyDataErrorInfo = bindingSource.GetPathMembers(false).PenultimateValue as INotifyDataErrorInfo;
if (notifyDataErrorInfo == null)
return;
var path = bindingSource.Path.Parts.LastOrDefault();
var paths = ErrorPaths;
if (!string.IsNullOrEmpty(path) || paths == null || paths.Length == 0)
CollectErrors(notifyDataErrorInfo, path, ref errors);
if (paths != null)
{
for (int i = 0; i < paths.Length; i++)
CollectErrors(notifyDataErrorInfo, paths[i], ref errors);
}
}
private void TrySubscribe(IObserver source)
{
var dataErrorInfo = source.GetPathMembers(false).PenultimateValue as INotifyDataErrorInfo;
if (dataErrorInfo == null)
return;
var subscriber = BindingServiceProvider.WeakEventManager.TrySubscribe(dataErrorInfo, ErrorsChangedEvent, this);
if (subscriber != null)
_subscribers.Add(subscriber);
}
