private void InvalidateTokensInternalList()
{
Tokens.Clear();
var id = 1;
foreach (var item in ItemsSource)
{
var tokenInfo = new TokenInfo
{
Id = ++id, Content = item, Visibility = Visibility.Visible
};
Tokens.Add(tokenInfo);
}
}
private void ToggleContainerVisibility(FrameworkElement container, TokenInfo tokenInfo)
{
if (container == null || tokenInfo == null)
{
return;
}
var searchFields = container.ChildrenOfType<TextBlock>();
if (searchFields == null || searchFields.Count <= 0)
{
tokenInfo.Visibility = Visibility.Collapsed;
return;
}
var isFilterContained = false;
var highlightingForeground = HighlightingForeground;
var highlightingBackground = this.HighlightingBackground;
foreach (var field in searchFields)
{
if (TokenEditExtensions.GetIsExcludedFromSearch(field))
{
continue;
}
// clear any previously applied formatting
var contentRange = new TextRange(field.ContentStart, field.ContentEnd);
contentRange.ClearAllProperties();
var matches = Regex.Matches(field.Text, Filter, RegexOptions.IgnoreCase);
if (matches.Count == 0)
{
continue;
}
isFilterContained = true;
foreach (Match match in matches)
{
var textRange = field.GetTextRangeFromCharOffset(match.Index, match.Length);
textRange.ApplyPropertyValue(TextElement.BackgroundProperty, highlightingBackground);
if (highlightingForeground != null)
{
textRange.ApplyPropertyValue(TextElement.ForegroundProperty, highlightingForeground);
}
}
}
tokenInfo.Visibility = isFilterContained ? Visibility.Visible : Visibility.Collapsed;
}
/// <summary>
/// Handle changes in the source collection
/// </summary>
private void OnSourceSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
var id = Tokens.Max(ti => ti.Id);
foreach (var newToken in e.NewItems)
{
var tokenInfo = new TokenInfo
{
Id = ++id, Content = newToken, Visibility = Visibility.Visible
};
Tokens.Add(tokenInfo);
}
break;
}
case NotifyCollectionChangedAction.Remove:
{
foreach (var oldToken in e.OldItems)
{
var tokenInfo = Tokens.FirstOrDefault(ti => ti.Content == oldToken);
if (tokenInfo == null)
{
continue;
}
Tokens.Remove(tokenInfo);
}
break;
}
case NotifyCollectionChangedAction.Reset:
InvalidateTokensInternalList();
break;
default:
throw new InvalidOperationException();
}
}
