private void CreateSingleEdit(Action editAction)
{
_ignoreChange = true;
editAction.Invoke();
TextDocument.EndUndoGroup();
TextDocument.BeginUndoGroup();
_ignoreChange = false;
}
private void RichEditBox_TextChanging(RichEditBox sender, RichEditBoxTextChangingEventArgs args)
{
if (_ignoreChange || !args.IsContentChanging)
{
return;
}
_ignoreChange = true;
ValidateTokensInDocument();
TextDocument.EndUndoGroup();
TextDocument.BeginUndoGroup();
_ignoreChange = false;
}
internal async Task CommitSuggestionAsync(object selectedItem)
{
var currentQuery = _currentQuery;
var range = currentQuery?.Range.GetClone();
var id = Guid.NewGuid();
var prefix = currentQuery?.Prefix;
var query = currentQuery?.QueryText;
// range has length of 0 at the end of the commit.
// Checking length == 0 to avoid committing twice.
if (prefix == null || query == null || range == null || range.Length == 0)
{
return;
}
var textBefore = range.Text;
var format = CreateTokenFormat(range);
var eventArgs = new SuggestionChosenEventArgs
{
Id = id,
Prefix = prefix,
QueryText = query,
SelectedItem = selectedItem,
DisplayText = query,
Format = format
};
if (SuggestionChosen != null)
{
await SuggestionChosen.InvokeAsync(this, eventArgs);
}
var text = eventArgs.DisplayText;
// Since this operation is async, the document may have changed at this point.
// Double check if the range still has the expected query.
if (string.IsNullOrEmpty(text) || textBefore != range.Text ||
!TryExtractQueryFromRange(range, out var testPrefix, out var testQuery) ||
testPrefix != prefix || testQuery != query)
{
return;
}
lock (_tokensLock)
{
var displayText = prefix + text;
_ignoreChange = true;
var committed = TryCommitSuggestionIntoDocument(range, displayText, id, eventArgs.Format ?? format);
TextDocument.EndUndoGroup();
TextDocument.BeginUndoGroup();
_ignoreChange = false;
if (committed)
{
var token = new RichSuggestToken(id, displayText)
{
Active = true, Item = selectedItem
};
token.UpdateTextRange(range);
_tokens.TryAdd(range.Link, token);
}
}
}