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 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;
}
public void InitializeTokensFromText(string text)
{
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 ) );
}
}
}