/// <summary>Occurs on the background thread immediately before <see cref="RootNode{TChild}.ReloadNodes"/> is called.</summary>
protected override void OnReloading(ICollection <BaseBranchNode> olds, ICollection <BaseBranchNode> news)
{
base.OnReloading(olds, news);
// recursive get branches...
List <string> branches = new List <string>();
Func <List <string>, BaseBranchNode, List <string> > getChildBranches = ((seed, node) =>
{
BranchPathNode branchPath = node as BranchPathNode;
if (branchPath != null)
{// BranchPath
return(branchPath.Recurse(
seed,
(bbp, count) => (from branchNode in branchPath.Children
let branch = branchNode as BranchNode
where branch != null
select branch.FullPath).ToList()));
}// else Branch
return(new List <string> {
node.FullPath
});
});
foreach (BaseBranchNode baseBranchNode in news)
{
branches.AddRange(getChildBranches(branches, baseBranchNode));
}
Branches = branches;
SetFavorites(news);
}
public T Recurse <T>(T seed, Func <BaseBranchNode, T, T> aggregate)
{
T egg = seed;
foreach (BaseBranchNode baseBranchNode in Children)
{
egg = aggregate(baseBranchNode, seed);
BranchPathNode branchPath = baseBranchNode as BranchPathNode;
if (branchPath != null)
{
egg = branchPath.Recurse(egg, aggregate);
}
}
return(egg);
}
void SetFavorites(ICollection <BaseBranchNode> news)
{
favorites.Clear();
var favs = (from section in UiCommands.Module.GetLocalConfig().ConfigSections
where Equals(section.SectionName, "branch")
let value = section.GetValue("fav")
where value.IsNotNullOrWhitespace()
select section.SubSection).ToList();
if (favs.Any() == false)
{// no branches config'd -> return
return;
} // else...
Func <List <BranchNode>, BaseBranchNode, List <BranchNode> > getFavBranches = ((seed, node) =>
{
BranchPathNode branchPath = node as BranchPathNode;
if (branchPath != null)
{
// BranchPath
return(branchPath.Recurse(
seed,
(bbp, favors) => (from branchNode in branchPath.Children
let branch = branchNode as BranchNode
where branch != null
let isFav = favs.Any(fav => Equals(fav, branchNode.FullPath))
where isFav
select branch).ToList()));
} // else (Branch)
BranchNode branchNod = node as BranchNode;
if (branchNod != null && favs.Any(fav => Equals(fav, branchNod.FullPath)))
{// branch AND
return(new List <BranchNode> {
branchNod
});
}
return(new List <BranchNode>());
});
foreach (BaseBranchNode baseBranchNode in news)
{
favorites.AddRange(getFavBranches(favorites, baseBranchNode));
}
}