/// <summary>
/// Handles search completion.
/// </summary>
/// <param name="sender">Event sender.</param>
/// <param name="e">Event arguments.</param>
private void searchWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
IsSearching = false;
if (e.Result != null)
{
var result = (Tuple <IEnumerable <ISearchHit>, int, string>)e.Result;
if (result.Item2 > 0)
{
// Start background worker, which will count the total number of matches
if (!mRequery)
{
if (mCountMatches)
{
IsCountingMatches = true;
if (mSearchHitCountWorker != null)
{
mSearchHitCountWorker.CancelAsync();
DetachFromSearchHitCountBackgroundWorker();
}
mSearchHitCountWorker = new BackgroundWorker();
mSearchHitCountWorker.WorkerReportsProgress = true;
mSearchHitCountWorker.WorkerSupportsCancellation = true;
mSearchHitCountWorker.DoWork += searchHitCounter_DoWork;
mSearchHitCountWorker.RunWorkerCompleted += searchHitCounter_RunWorkerCompleted;
mSearchHitCountWorker.ProgressChanged += searchHitCounter_ProgressChanged;
mSearchHitCountWorker.RunWorkerAsync(result.Item1);
}
}
var resultsEnumerable = new ObservableEnumerable();
resultsEnumerable.Enumerable = CreateViewModelsForSearchResults(result.Item1, resultsEnumerable);
SearchResults = resultsEnumerable;
}
else
{
SearchResults = new SearchHitViewModel[] {};
TotalMatchCount = 0;
}
// Set results.
SearchResultCount = result.Item2;
SearchResultsQuery = result.Item3;
}
else
{
// Set results.
SearchResultCount = 0;
TotalMatchCount = 0;
SearchResults = null;
}
// Restart search if requested.
if (mRequery)
{
mRequery = false;
StartSearch(mSearchType, mSearchQuery, mUseFileTypeFilter ? FileTypeFilter.AllowedFileTypes : null, mUseDirectoryFilter ? DirectoryFilter.AllowedDirectories : null);
}
}
/// <summary>
/// Returns an existing or creates a new view model for the specified search hit.
/// </summary>
/// <param name="searchHit">Search hit for which a view model should be returned, or created.</param>
/// <param name="parent">Parent enumerable</param>
/// <returns>Created or existing view model.</returns>
public static SearchHitViewModel GetOrCreateSearchHitViewModel(Engine.Interfaces.ISearchHit searchHit, ObservableEnumerable parent)
{
SearchHitViewModel viewModel = null;
if (!mViewModels.TryGetValue(searchHit, out viewModel))
{
viewModel = new SearchHitViewModel(searchHit, parent);
mViewModels.Add(searchHit, viewModel);
}
return(viewModel);
}
/// <summary>
/// Initialization constructor.
/// </summary>
/// <param name="searchHit">Underlying search hit.</param>
private SearchHitViewModel(Engine.Interfaces.ISearchHit searchHit, ObservableEnumerable parent)
{
mParent = parent;
mSearchHit = searchHit;
}
/// <summary>
/// Processes search results and creates a SearchHitViewModel for each search result.
/// </summary>
/// <param name="searchResults">Search results, for which view models should be created.</param>
/// <returns></returns>
private static IEnumerable CreateViewModelsForSearchResults(IEnumerable <ISearchHit> searchResults, ObservableEnumerable parent)
{
if (searchResults != null)
{
foreach (var searchResult in searchResults)
{
SearchHitViewModel viewModel = ViewModel.SearchHitViewModel.GetOrCreateSearchHitViewModel(searchResult, parent);
yield return(viewModel);
if (viewModel.IsExpanded)
{
foreach (var occurrence in viewModel.Occurrences)
{
yield return(occurrence);
}
}
}
}
yield break;
}
