private TokenItem CreateTokenItem(Token token)
{
object item = token.Item;
var tokenItem = new TokenItem()
{
TokenKey = token.TokenKey,
Content = item,
ContentTemplate = TokenTemplate
};
if (TokenTemplate == null)
{
//if no template was supplied let's try to get a value from the object using the DisplayMemberPath
if (!String.IsNullOrEmpty(DisplayMemberPath))
{
var property = item.GetType().GetProperty(DisplayMemberPath);
if (property != null)
{
var value = property.GetValue(item, null);
if (value != null)
tokenItem.Content = value;
}
}
}
return tokenItem;
}
private InlineUIContainer CreateTokenContainer(Token token)
{
return new InlineUIContainer(CreateTokenItem(token))
{
BaselineAlignment = BaselineAlignment.Center
};
}
private Token ResolveTokenBySearchMemberPath(string searchText)
{
//create a new token and default the settings to the search text
var token = new Token(TokenDelimiter)
{
TokenKey = searchText,
Item = searchText
};
if (ItemsSource != null)
{
foreach (object item in ItemsSource)
{
var searchProperty = item.GetType().GetProperty(SearchMemberPath);
if (searchProperty != null)
{
var searchValue = searchProperty.GetValue(item, null);
if (searchText.Equals(searchValue.ToString(), StringComparison.InvariantCultureIgnoreCase))
{
var valueProperty = item.GetType().GetProperty(ValueMemberPath);
if (valueProperty != null)
token.TokenKey = valueProperty.GetValue(item, null).ToString();
token.Item = item;
break;
}
}
}
}
return token;
}
private void ReplaceTextWithToken(string inputText, Token token)
{
_surpressTextChangedEvent = true;
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
SetTextInternal(Text + token.TokenKey);
}
_surpressTextChangedEvent = false;
}
private void InitializeTokensFromText()
{
if (!String.IsNullOrEmpty(Text))
{
string[] tokenKeys = Text.Split(new string[] { TokenDelimiter }, StringSplitOptions.RemoveEmptyEntries);
foreach (string tokenKey in tokenKeys)
{
var para = _rtb.CaretPosition.Paragraph;
var token = new Token(TokenDelimiter)
{
TokenKey = tokenKey,
Item = ResolveItemByTokenKey(tokenKey)
};
para.Inlines.Add(CreateTokenContainer(token));
}
}
}
