Ejemplo n.º 1
0
        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);
        }