private void ValidateTokenFromRange(ITextRange range)
{
if (range.Length == 0 || !TryGetTokenFromRange(range, out var token))
{
return;
}
// Check for duplicate tokens. This can happen if the user copies and pastes the token multiple times.
if (token.Active && token.RangeStart != range.StartPosition && token.RangeEnd != range.EndPosition)
{
var guid = Guid.NewGuid();
if (TryCommitSuggestionIntoDocument(range, token.DisplayText, guid, CreateTokenFormat(range), false))
{
token = new RichSuggestToken(guid, token.DisplayText)
{
Active = true, Item = token.Item
};
token.UpdateTextRange(range);
_tokens.Add(range.Link, token);
}
return;
}
if (token.ToString() != range.Text)
{
range.Delete(TextRangeUnit.Story, 0);
token.Active = false;
return;
}
token.UpdateTextRange(range);
token.Active = true;
}
/// <summary>
/// Try getting the token associated with a text range.
/// </summary>
/// <param name="range">The range of the token to get.</param>
/// <param name="token">When this method returns, contains the token associated with the specified range; otherwise, it is null.</param>
/// <returns>true if there is a token associated with the text range; otherwise false.</returns>
public bool TryGetTokenFromRange(ITextRange range, out RichSuggestToken token)
{
token = null;
range = range.GetClone();
if (range != null && !string.IsNullOrEmpty(range.Link))
{
lock (_tokensLock)
{
return(_tokens.TryGetValue(range.Link, out token));
}
}
return(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;
}
var displayText = prefix + text;
void RealizeToken()
{
if (TryCommitSuggestionIntoDocument(range, displayText, id, eventArgs.Format ?? format, true))
{
var token = new RichSuggestToken(id, displayText)
{
Active = true, Item = selectedItem
};
token.UpdateTextRange(range);
_tokens.Add(range.Link, token);
}
}
lock (_tokensLock)
{
this.CreateSingleEdit(RealizeToken);
}
}