private void OnUnloaded(object sender, RoutedEventArgs e)
{
ViewModel.DocumentChanged -= OnViewModelDocumentChanged;
CodeEditorToolTip.IsOpen = false;
CompletionListFlyout.Hide();
}
private async void OnCodeEditorCharacterReceived(UIElement sender, CharacterReceivedRoutedEventArgs e)
{
if (e.Character == '.' || IsValidCSharpIdentifierCharacter(e.Character))
{
await ShowCompletionListAsync();
}
else
{
CompletionListFlyout.Hide();
}
}
private async Task ShowCompletionListAsync()
{
if (ViewModel.CodeEditor is null)
{
return;
}
ITextRange range = CodeEditor.Document.Selection;
if (range.Length < 0)
{
range.EndPosition = range.StartPosition;
}
else
{
range.StartPosition = range.EndPosition;
}
TextSpan selectionSpan = GetAdjustedTextSpan(TextSpan.FromBounds(range.StartPosition, range.EndPosition), ViewModel.CurrentText, ViewModel.NewLineMode, true);
CompletionList?completionList = await ViewModel.GetCompletionListAsync(selectionSpan.Start);
if (completionList != null)
{
bool expandsToWord = true;
ITextRange wordRange = range.GetClone();
if (wordRange.Character == '\r')
{
ITextRange wordRangeClone = range.GetClone();
wordRangeClone.Move(TextRangeUnit.Word, -1);
expandsToWord = IsValidCSharpIdentifierCharacter(wordRangeClone.Character);
}
if (expandsToWord)
{
wordRange.Move(TextRangeUnit.Word, -1);
wordRange.MoveEnd(TextRangeUnit.Word, 1);
}
string word = wordRange.Text.Trim();
var completionItems = ViewModel.FilterCompletionItems(completionList.Items, word);
CompletionListFlyout.Items.Clear();
foreach (CompletionItem item in completionItems)
{
var properties = item.Properties;
if (properties.TryGetValue("SymbolName", out string symbolName))
{
MenuFlyoutItem menuFlyoutItem = new MenuFlyoutItem
{
Text = symbolName
};
menuFlyoutItem.Click += async(s, e) =>
{
CompletionChange?completionChange = await ViewModel.GetCompletionChangeAsync(item);
if (completionChange != null)
{
TextSpan span = GetAdjustedTextSpan(completionChange.TextChange.Span, ViewModel.CurrentText, ViewModel.NewLineMode);
CodeEditor.Document.Selection.StartPosition = span.Start;
CodeEditor.Document.Selection.EndPosition = span.End;
CodeEditor.Document.Selection.TypeText(completionChange.TextChange.NewText);
}
};
CompletionListFlyout.Items.Add(menuFlyoutItem);
}
}
if (CompletionListFlyout.Items.Count > 0)
{
Point flyoutPosition = GetAdjustedPointFromDocument(range);
flyoutPosition = new Point(flyoutPosition.X + 12, flyoutPosition.Y + 8);
CompletionListFlyout.ShowAt(CodeEditor, new FlyoutShowOptions {
Position = flyoutPosition, ShowMode = FlyoutShowMode.Transient
});
return;
}
}
CompletionListFlyout.Hide();
}
