StyleSheet  - AS3

package {
    import flash.display.Sprite;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.text.StyleSheet;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.events.IOErrorEvent;
    import flash.events.Event;
    import flash.events.MouseEvent;

    public class StyleSheet_parseCSSExample extends Sprite {
        private var loader:URLLoader = new URLLoader();
        private var field:TextField = new TextField();
        private var exampleText:String = "<h1>This is a headline</h1>"
                    + "<p>This is a line of text. <span class='bluetext'>" 
                    + "This line of text is colored blue.</span></p>";
        private var sheet:StyleSheet = new StyleSheet();
        private var cssReady:Boolean = false;

        public function StyleSheet_parseCSSExample() {
            field.x = 10;
            field.y = 10;
            field.background = true;
            field.multiline = true;
            field.autoSize = TextFieldAutoSize.LEFT;
            field.htmlText = exampleText;

            field.addEventListener(MouseEvent.CLICK, clickHandler);
            
            addChild(field);
            
            var req:URLRequest = new URLRequest("test.css");
            loader.load(req);

            loader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
            loader.addEventListener(Event.COMPLETE, loaderCompleteHandler);
        }

        public function errorHandler(e:IOErrorEvent):void {
            field.htmlText = "Couldn't load the style sheet file.";
        }

        public function loaderCompleteHandler(event:Event):void {
            sheet.parseCSS(loader.data);
            cssReady = true;
        }

        public function clickHandler(e:MouseEvent):void {

            if (cssReady) {
                field.styleSheet = sheet;
                field.htmlText = exampleText;
                
                var style:Object = sheet.getStyle("h1");
                field.htmlText += "<p>Headline font-family is: " + style.fontFamily + "</p>";
                field.htmlText += "<p>Headline color is: " + style.color + "</p>";  

            } else {
                field.htmlText = "Couldn't apply the CSS styles.";
            }
        }
    }
}

package {
    import flash.display.Sprite;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.text.StyleSheet;
    import flash.text.TextField;
    import flash.text.TextFormat;
    import flash.text.TextFieldType;
    import flash.events.IOErrorEvent;
    import flash.events.Event;

    public class StyleSheet_transformExample extends Sprite {
        private var loader:URLLoader = new URLLoader();
        private var inputField:TextField = new TextField();
        private var sheet:StyleSheet = new StyleSheet();

        public function StyleSheet_transformExample() {
            inputField.x = 10;
            inputField.y = 10;
            inputField.background = true;
            inputField.width = 300;
            inputField.height = 200;
            inputField.wordWrap = true;
            inputField.multiline = true;    
            inputField.type = TextFieldType.INPUT;

            addChild(inputField);
            
            var req:URLRequest = new URLRequest("test.css");
            loader.load(req);

            loader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
            loader.addEventListener(Event.COMPLETE, loaderCompleteHandler);
        }

        public function errorHandler(e:IOErrorEvent):void {
            inputField.htmlText = "Couldn't load the style sheet file.";
        }

        public function loaderCompleteHandler(event:Event):void {
            var cssFormat:TextFormat = new TextFormat();
            sheet.parseCSS(loader.data);
            var style:Object = sheet.getStyle("p");
            cssFormat = sheet.transform(style);
            inputField.defaultTextFormat = cssFormat;
        }
    }
}