private static bool CanMoveInside(MoveStrategyContext context, BaseFrameworkElement candidateContainer)
{
if (context.PrimarySelection == null)
{
return(false);
}
IProperty contentProperty = MoveStrategyFactory.GetContentProperty(context, (SceneNode)candidateContainer);
if (contentProperty == null)
{
return(false);
}
PropertySceneInsertionPoint insertionPoint = new PropertySceneInsertionPoint((SceneElement)candidateContainer, contentProperty);
ControlTemplateElement controlTemplateElement;
if (candidateContainer.IsLockedOrAncestorLocked || candidateContainer.IsHiddenOrCollapsedOrAncestorHiddenOrCollapsed || (context.SelectedElements.Count == 0 || Enumerable.Any <SceneElement>((IEnumerable <SceneElement>)context.SelectedElements, (Func <SceneElement, bool>)(element => !insertionPoint.CanInsert((ITypeId)element.TrueTargetTypeId)))) || ProjectNeutralTypes.TabItem.IsAssignableFrom((ITypeId)candidateContainer.Type) || (candidateContainer.Name == "PART_ContentHost" && typeof(ScrollViewer).IsAssignableFrom(candidateContainer.TargetType) && ((controlTemplateElement = context.RootNode as ControlTemplateElement) != null && typeof(TextBoxBase).IsAssignableFrom(controlTemplateElement.TargetElementType)) || candidateContainer.IsPlaceholder))
{
return(false);
}
foreach (SceneNode sceneNode in context.DraggedElements)
{
if (sceneNode.IsAncestorOf((SceneNode)candidateContainer))
{
return(false);
}
}
return(true);
}
private static MoveStrategy CreateForLayoutMode(MoveStrategyContext context, SceneElement hitElement)
{
SceneElement sceneElement = hitElement;
while (sceneElement != null)
{
BaseFrameworkElement frameworkElement = sceneElement as BaseFrameworkElement;
if (frameworkElement != null && context.RootNode.IsAncestorOf((SceneNode)frameworkElement))
{
if (!MoveStrategyFactory.CanMoveInside(context, frameworkElement))
{
sceneElement = frameworkElement.ParentElement;
continue;
}
MoveStrategy byParentType = MoveStrategyFactory.CreateByParentType(context, frameworkElement);
if (byParentType != null)
{
bool flag = false;
ItemsControlElement itemsControlElement = frameworkElement.ParentElement as ItemsControlElement;
ContentControlElement contentControlElement = frameworkElement as ContentControlElement;
if (itemsControlElement != null && contentControlElement != null && (ItemsControlElement.ItemsProperty.Equals((object)itemsControlElement.GetPropertyForChild((SceneNode)frameworkElement)) && (itemsControlElement.ViewObject as IViewItemsControl).IsItemItsOwnContainer(contentControlElement.ViewObject)))
{
flag = true;
}
if (!flag)
{
IProperty contentProperty = MoveStrategyFactory.GetContentProperty(context, (SceneNode)frameworkElement);
int childrenForElement = MoveStrategy.GetMaxChildrenForElement((SceneElement)frameworkElement, contentProperty);
if (context.DraggedElements.Count <= childrenForElement && (childrenForElement != 1 || context.DraggedElements.Count != 1 || (!frameworkElement.IsAncestorOf((SceneNode)context.DraggedElements[0]) || context.DraggedElements[0].Parent == frameworkElement)))
{
byParentType.LayoutContainer = frameworkElement;
return(byParentType);
}
}
}
}
if (sceneElement != context.RootNode)
{
sceneElement = sceneElement.ParentElement;
}
else
{
break;
}
}
return((MoveStrategy)null);
}
public static MoveStrategy Create(MoveStrategyContext context, SceneElement hitElement, bool constraining)
{
MoveStrategy moveStrategy = (MoveStrategy)null;
if (context.IsRecordingKeyframes)
{
moveStrategy = MoveStrategyFactory.CreateForAnimationMode(context);
}
if (moveStrategy == null)
{
moveStrategy = MoveStrategyFactory.CreateForLayoutMode(context, hitElement);
}
if (moveStrategy != null)
{
moveStrategy.IsConstraining = constraining;
}
return(moveStrategy);
}
