public static IEnumerable <TreeNodeViewModel> SelectFrom(IEnumerable <Node> nodes)
{
foreach (var node in nodes)
{
TreeNodeViewModel element = Create(node);
if (element != null)
{
yield return(element);
}
}
}
protected override async Task Use(Uri url, HTMLDocument document, CancellationToken cancel)
{
nodes.Clear();
Status = "Constructing tree ...";
var elements = TreeNodeViewModel.SelectFrom(document.ChildNodes);
foreach (var element in elements)
{
element.Parent = nodes;
nodes.Add(element);
}
await Task.Yield();
}
static TreeNodeViewModel Create(Element node)
{
var vm = new TreeNodeViewModel {
Value = OpenTag(node)
};
foreach (var element in SelectFrom(node.ChildNodes))
{
element.parent = vm.children;
vm.children.Add(element);
}
if (vm.children.Count != 0)
{
vm.expansionElement = new TreeNodeViewModel {
Value = CloseTag(node)
}
}
;
return(vm);
}
static TreeNodeViewModel Create(Element node)
{
var vm = new TreeNodeViewModel { Value = OpenTag(node) };
foreach (var element in SelectFrom(node.ChildNodes))
{
element.parent = vm.children;
vm.children.Add(element);
}
if (vm.children.Count != 0)
vm.expansionElement = new TreeNodeViewModel { Value = CloseTag(node) };
return vm;
}