protected virtual LayoutNode LayoutElement(LayoutNode currentNode, Element element)
{
// Eliminate empty groups, and groups with only one element
GroupElement groupElement = element as GroupElement;
if (groupElement != null)
{
if (groupElement.Elements.Count == 0)
{
return(currentNode);
}
if (!groupElement.ContainsMultipleElements())
{
return(LayoutElement(currentNode, groupElement.Elements[0]));
}
}
ElementNode elementNode = new ElementNode(element);
if ((element is GroupElement) && (((GroupElement)element).Elements.Count > 0))
{
LayoutNode newNode = new LayoutBuilder().Layout(((GroupElement)element).Elements);
if (newNode != null)
{
elementNode.Children.Add(newNode);
}
}
if (currentNode != null)
{
LayoutNode parent;
if (_flowBreak || _return)
{
parent = PrepareLayout(currentNode, ReverseFlow(_flow));
}
else
{
parent = PrepareLayout(currentNode, _flow);
}
if (_break)
{
PrepareLayout(parent, ReverseFlow(_flow)).Children.Add(PrepareLayout(elementNode, _flow));
}
else if (_return)
{
PrepareLayout(parent, _flow).Children.Add(elementNode);
}
else
{
parent.Children.Add(elementNode);
}
}
switch (element.Flow)
{
case Flow.Horizontal:
case Flow.Vertical: _flow = element.Flow; break;
}
_return = _flowBreak && !element.FlowBreak;
_break = element.Break;
_flowBreak = element.FlowBreak;
return(elementNode);
}
