/// <summary>
/// Gets a list of active bindings on the specified FrameworkElement. Bindings are gathered
/// according to the same conditions BindingGroup uses to find bindings of descendent elements
/// within the visual tree.
/// </summary>
/// <param name="element">Root FrameworkElement to search under</param>
/// <param name="inheritedDataContext">DomainContext of the element's parent</param>
/// <param name="dataItem">Target DomainContext</param>
/// <param name="twoWayOnly">If true, only returns TwoWay Bindings</param>
/// <returns>The list of active bindings.</returns>
private static List <DataFormBindingInfo> GetDataFormBindingInfoOfSingleElement(this FrameworkElement element, object inheritedDataContext, object dataItem, bool twoWayOnly)
{
// Now see which of the possible dependency properties are being used
List <DataFormBindingInfo> bindingData = new List <DataFormBindingInfo>();
foreach (DependencyProperty bindingTarget in ValidationUtil.GetDependencyPropertiesForElement(element))
{
// We add bindings according to the same conditions as BindingGroups:
// Element.Binding.Mode == TwoWay
// Element.Binding.Source == null
// DataItem == ContextElement.DataContext where:
// If Element is ContentPresenter and TargetProperty is Content, ContextElement = Element.Parent
// Else if TargetProperty is DomainContext, ContextElement = Element.Parent
// Else ContextElement = Element
BindingExpression bindingExpression = element.GetBindingExpression(bindingTarget);
if (bindingExpression != null &&
bindingExpression.ParentBinding != null &&
(!twoWayOnly || bindingExpression.ParentBinding.Mode == BindingMode.TwoWay) &&
bindingExpression.ParentBinding.Source == null)
{
object dataContext;
if (bindingTarget == FrameworkElement.DataContextProperty ||
(element is ContentPresenter && bindingTarget == ContentPresenter.ContentProperty))
{
dataContext = inheritedDataContext;
}
else
{
dataContext = element.DataContext ?? inheritedDataContext;
}
if (dataItem == dataContext)
{
bindingData.Add(new DataFormBindingInfo(bindingExpression, bindingTarget, element));
}
}
}
return(bindingData);
}
