/// <summary>
/// Occurs when <see cref="TokensSource"/> property changes.
/// </summary>
protected virtual async void OnTokensSourceChanged(string Value)
{
if (!TokensChangeHandled)
{
TextChangeHandled = true;
await Dispatcher.BeginInvoke(() =>
{
var d = TokenDelimiter.ToString();
//Check to see if delimiter occurs more than once in any one place.
var Temp = Regex.Replace(Value, d + "+", d);
//If so, correct it
if (Temp != Value)
{
TokensChangeHandled = true;
TokensSource = Temp;
TokensChangeHandled = false;
}
Tokens.Clear();
Blocks.Clear();
if (Value?.ToString().IsEmpty() == false)
{
var p = new Paragraph();
Tokenizer?.Tokenize(Value, TokenDelimiter)?.ForEach(Token => p.Inlines.Add(GenerateInline(Token)));
Blocks.Add(p);
}
});
TextChangeHandled = false;
}
}
public IEnumerable <string> GetTokens()
{
foreach (InlineUIContainer inline in _rtb.CaretPosition.Paragraph.Inlines.Where(inline => inline is InlineUIContainer && ((inline as InlineUIContainer).Child as TokenItem).TokenKey != null))
{
if (inline.Child is TokenItem)
{
var str = (inline.Child as TokenItem).TokenKey.TrimEnd(TokenDelimiter.ToCharArray()).Trim();
if (!string.IsNullOrWhiteSpace(str))
{
yield return(str);
}
}
}
}
public void DeleteTokens(List <string> tokens)
{
var para = _rtb.CaretPosition.Paragraph;
var inlinesToRemove = para.Inlines.Where(inline => inline is InlineUIContainer && ((inline as InlineUIContainer).Child as TokenItem).TokenKey != null).ToList();
foreach (InlineUIContainer inlineToRemove in inlinesToRemove)
{
if (inlineToRemove.Child is TokenItem)
{
var str = (inlineToRemove.Child as TokenItem).TokenKey.TrimEnd(TokenDelimiter.ToCharArray()).Trim();
if (tokens.Contains(str))
{
para.Inlines.Remove(inlineToRemove);
}
}
}
}
private void ReplaceTextWithToken(string inputText, Token token)
{
_surpressTextChangedEvent = true;
var ok = !string.IsNullOrWhiteSpace(inputText.Trim().Trim(TokenDelimiter.ToCharArray()));
var para = _rtb.CaretPosition.Paragraph;
var matchedRun = para.Inlines.FirstOrDefault(inline =>
{
var run = inline as Run;
return(run != null && run.Text.EndsWith(inputText));
}) as Run;
if (matchedRun != null) // Found a Run that matched the inputText
{
var tokenContainer = CreateTokenContainer(token);
para.Inlines.InsertBefore(matchedRun, tokenContainer);
// Remove only if the Text in the Run is the same as inputText, else split up
if (matchedRun.Text == inputText)
{
para.Inlines.Remove(matchedRun);
}
else // Split up
{
var index = matchedRun.Text.IndexOf(inputText) + inputText.Length;
var tailEnd = new Run(matchedRun.Text.Substring(index));
para.Inlines.InsertAfter(matchedRun, tailEnd);
para.Inlines.Remove(matchedRun);
}
//now append the Text with the token key
if (!ok)
{
para.Inlines.Remove(tokenContainer);
}
}
_surpressTextChangedEvent = false;
}
