private void HandleKeyPress(object sender, KeyEventArgs e)
{
switch (e.Key)
{
case Key.Tab:
if (SelectedItem != null)
{
CommitSelectionAndMoveFocus();
}
break;
case Key.Enter:
CommitSelectionAndMoveFocus();
e.Handled = true;
break;
case Key.Escape:
Flyout.IsOpen = false;
SearchTextBox.ScrollToEnd();
SelectedItem = null;
e.Handled = true;
break;
case Key.Down:
if (Options.Items.Count > 0)
{
Options.ScrollIntoView(Options.Items[0]);
var fe = (FrameworkElement)Options.ItemContainerGenerator.ContainerFromIndex(0);
fe?.Focus();
Options.SelectedIndex = 0;
e.Handled = true;
}
break;
}
}
private void SearchTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
TextChange textChange = e.Changes.Last();
// We will invoke completion on text insertion and not deletion.
// Also, we don't want to invoke completion on dialog load as we pre populate the target
// location textbox with name of the folder when dialog is initially loaded.
if (textChange.AddedLength > 0 && SearchTextBox.CaretIndex > 0)
{
ThreadHelper.JoinableTaskFactory.RunAsync(async() =>
{
// grab these WPF dependant things while we're still on the UI thread
int caretIndex = SearchTextBox.CaretIndex;
SearchTextBoxViewModel viewModel = ViewModel;
string textBeforeGetCompletion = SearchTextBox.Text;
// Switch to a background thread to not block the UI thread, as this operation can take
// a while for slow network connections
await TaskScheduler.Default;
CompletionSet completionSet = await viewModel.GetCompletionSetAsync(caretIndex);
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
// If the value has changed then this request is out of date.
// If focus is elsewhere the work below won't be used anyway
if (textBeforeGetCompletion != SearchTextBox.Text || !SearchTextBox.IsFocused)
{
return;
}
if (completionSet.Completions == null || !completionSet.Completions.Any())
{
Flyout.IsOpen = false;
return;
}
// repopulate the completion list
CompletionEntries.Clear();
foreach (CompletionItem entry in completionSet.Completions)
{
CompletionEntries.Add(new CompletionEntry(entry, completionSet.Start, completionSet.Length));
}
PositionCompletionPopup(completionSet.Length);
if (CompletionEntries != null && CompletionEntries.Count > 0 && Options.SelectedIndex == -1)
{
CompletionItem selectionCandidate = await ViewModel.GetRecommendedSelectedCompletionAsync(
completionSet: completionSet,
lastSelected: SelectedItem?.CompletionItem);
SelectedItem = CompletionEntries.FirstOrDefault(x => x.CompletionItem.InsertionText == selectionCandidate.InsertionText) ?? CompletionEntries[0];
Options.ScrollIntoView(SelectedItem);
}
Flyout.IsOpen = true;
});
}
}
private void Commit(CompletionEntry completion)
{
if (completion == null)
{
return;
}
Text = completion.CompletionItem.InsertionText;
LibrarySearchBox.CaretIndex = Text.IndexOf(completion.CompletionItem.DisplayText, StringComparison.OrdinalIgnoreCase) + completion.CompletionItem.DisplayText.Length;
Flyout.IsOpen = false;
SelectedItem = null;
}
private void Commit(CompletionEntry completion)
{
if (completion == null || completion.CompletionItem.InsertionText == null)
{
return;
}
ViewModel.SearchText = completion.CompletionItem.InsertionText;
ViewModel.OnExternalTextChange();
SearchTextBox.CaretIndex = ViewModel.SearchText.IndexOf(completion.CompletionItem.DisplayText, StringComparison.OrdinalIgnoreCase) + completion.CompletionItem.DisplayText.Length;
Flyout.IsOpen = false;
SelectedItem = null;
}
private void HandleListBoxKeyPress(object sender, KeyEventArgs e)
{
int index = SearchTextBox.CaretIndex;
switch (e.Key)
{
case Key.Tab:
case Key.Enter:
CommitSelectionAndMoveFocus();
e.Handled = true;
break;
case Key.Up:
if (Options.SelectedIndex == 0)
{
SelectedItem = CompletionEntries[0];
LostFocus -= OnLostFocus;
SearchTextBox.Focus();
SearchTextBox.CaretIndex = index;
LostFocus += OnLostFocus;
}
break;
case Key.Escape:
Flyout.IsOpen = false;
SearchTextBox.ScrollToEnd();
SelectedItem = null;
e.Handled = true;
break;
case Key.Down:
case Key.PageDown:
case Key.PageUp:
case Key.Home:
case Key.End:
break;
default:
LostFocus -= OnLostFocus;
SearchTextBox.Focus();
SearchTextBox.CaretIndex = index;
LostFocus += OnLostFocus;
break;
}
}
private void SearchTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
TextChange textChange = e.Changes.Last();
// We will invoke completion on text insertion and not deletion.
// Also, we don't want to invoke completion on dialog load as we pre populate the target
// location textbox with name of the folder when dialog is initially loaded.
if (textChange.AddedLength > 0 && SearchTextBox.CaretIndex > 0)
{
VisualStudio.Shell.ThreadHelper.JoinableTaskFactory.Run(async() =>
{
CompletionSet completionSet = await ViewModel.GetCompletionSetAsync(SearchTextBox.CaretIndex);
if (completionSet.Completions == null || !completionSet.Completions.Any())
{
Flyout.IsOpen = false;
return;
}
// repopulate the completion list
CompletionEntries.Clear();
foreach (CompletionItem entry in completionSet.Completions)
{
CompletionEntries.Add(new CompletionEntry(entry, completionSet.Start, completionSet.Length));
}
PositionCompletionPopup(completionSet.Length);
if (CompletionEntries != null && CompletionEntries.Count > 0 && Options.SelectedIndex == -1)
{
CompletionItem selectionCandidate = await ViewModel.GetRecommendedSelectedCompletionAsync(
completionSet: completionSet,
lastSelected: SelectedItem?.CompletionItem);
SelectedItem = CompletionEntries.FirstOrDefault(x => x.CompletionItem.InsertionText == selectionCandidate.InsertionText) ?? CompletionEntries[0];
Options.ScrollIntoView(SelectedItem);
}
Flyout.IsOpen = true;
});
}
}
