IEnumerable <SearchResult> CollectSearchResults(SearchResultNode searchResultNode)
{
if (searchResultNode.SearchResult != null)
{
yield return(searchResultNode.SearchResult);
}
if (searchResultNode.ChildNodes != null)
{
foreach (var childNode in searchResultNode.ChildNodes)
{
foreach (var searchResult in CollectSearchResults(childNode))
{
yield return(searchResult);
}
}
}
}
void UpdateLibrarySearch()
{
string searchText = txtLibrarySearch.Text.Trim();
if (searchText.Length < 3)
{
searchText = "";
}
if (searchText == _lastSearchText)
{
return;
}
_lastSearchText = searchText;
bool isEmptySearch = string.IsNullOrWhiteSpace(searchText);
var rootNodes = new List <SearchResultNode>();
var currentNode = new List <(string PathComponent, SearchResultNode Node)>();
foreach (var result in _library.Search(searchText))
{
if (result.Components.Count < currentNode.Count)
{
currentNode.RemoveRange(result.Components.Count, currentNode.Count - result.Components.Count);
}
for (int i = 0; i < result.Components.Count; i++)
{
if ((i >= currentNode.Count) || !result.Components[i].Name.Equals(currentNode[i].PathComponent))
{
var node = new SearchResultNode();
if (i + 1 == result.Components.Count)
{
node.SearchResult = result;
result.ComponentsChanged +=
(sender, e) =>
{
node.Heading = CreateTextBlockForSearchResultComponent(result.Components.Last());
};
}
node.NodeType = (i + 1 < result.Components.Count) ? SearchResultNodeType.Folder : SearchResultNodeType.File;
node.Heading = CreateTextBlockForSearchResultComponent(result.Components[i]);
node.IsExpanded = !isEmptySearch;
if (i == 0)
{
rootNodes.Add(node);
}
else
{
var parentNode = currentNode[i - 1].Node;
if (parentNode.ChildNodes == null)
{
parentNode.ChildNodes = new System.Collections.ObjectModel.ObservableCollection <SearchResultNode>();
}
parentNode.ChildNodes.Add(node);
}
if (currentNode.Count > i)
{
currentNode.RemoveRange(i, currentNode.Count - i);
}
currentNode.Add((result.Components[i].Name, node));
}
}
}
tvLibrarySearchResults.ItemsSource = rootNodes;
}