Text control with truncateToFit property support

TruncatedText.as

package {

    import mx.controls.Text;
    import mx.core.UITextField;
    import mx.core.mx_internal;

    use namespace mx_internal;

    public class TruncatedText extends Text {
        
        protected static const TRUNCATION_INDICATOR : String = "...";

        public function TruncatedText() {
            super();
            
            truncateToFit = true;
        }
        
        override public function set text(text : String) : void {
            _isHTML = false;

            super.text = text;
        }
        
        override public function set htmlText(htmlText : String) : void {
            _isHTML = true;

             super.htmlText = htmlText;
        }
        
        protected function get truncationRequired() : Boolean {
            return (textField.height < textField.textHeight + UITextField.TEXT_HEIGHT_PADDING);
        }
        
        override protected function updateDisplayList(w : Number, h : Number) : void {
            super.updateDisplayList(w, h);
            
            if (truncateToFit) {
                if (!_isHTML) {
                    var originalText : String = textField.text = super.text;
                    if (truncationRequired) {
                        var l : int = 0;
                        var r : int = textField.text.length;
                        while (r - l > 1) {
                            var median : Number = Math.floor((l + r) / 2);
                            textField.text = originalText.substr(0, median) + TRUNCATION_INDICATOR;
                            if (truncationRequired) {
                                r = median;
                            } else {
                                l = median;
                            }
                        }
                        while (truncationRequired && median > 0) {
                            median--;
                            textField.text = originalText.substr(0, median) + TRUNCATION_INDICATOR;
                        }
                    }
                }
            }
            
        }
        
        private var _isHTML : Boolean;
    }
}