private async void search_Click(object sender, RoutedEventArgs e)
{
search.IsEnabled = false;
Cursor = Cursors.Wait;
string word = searchText.Text;
bool isCaseSensitive = caseSensitive.IsChecked == true;
IEnumerable <WordLocation> wordLocs = (useWildcards.IsChecked == true) ?
await _wordSearcher.WildcardSearchAsync(word, isCaseSensitive) :
await _wordSearcher.SearchAsync(word, isCaseSensitive);
List <WordLocation> locations = wordLocs.ToList();
status.Text = $"{locations.Count} found";
searchResults.ItemsSource = locations;
List <Tuple <WordLocation, TextRange> > ranges = new List <Tuple <WordLocation, TextRange> >();
TextPointer pointer = paragraph.ContentStart;
while (pointer != null)
{
if (pointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
foreach (WordLocation loc in locations)
{
TextPointer start = pointer.GetPositionAtOffset(loc.Location),
end = start.GetPositionAtOffset(loc.Word.Length);
ranges.Add(Tuple.Create(loc, new TextRange(start, end)));
}
break;
}
pointer = pointer.GetNextContextPosition(LogicalDirection.Forward);
}
// Hilite all finds yellow:
Action hilite = () =>
{
if (_ranges != null)
{
_ranges.ForEach(tr => tr.Item2.ClearAllProperties());
}
_ranges = ranges;
if (locations.Count > 0)
{
searchResults.SelectedIndex = 0;
}
_ranges.ForEach((tr) =>
{
tr.Item2.ApplyPropertyValue(TextElement.BackgroundProperty, Brushes.Yellow);
tr.Item2.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Navy);
});
search.IsEnabled = true;
Cursor = Cursors.Arrow;
};
Dispatcher.BeginInvoke(hilite, DispatcherPriority.Background);
}