ISWFContext  - AS3

package flashx.textLayout.compose.examples {
    import flash.display.Sprite;
    
    import flashx.textLayout.compose.ISWFContext;
        
    public class EmbeddedFontLineCreator extends Sprite implements ISWFContext
    {
        [Embed( source="C:\\Windows\\Fonts\\BirchStd.otf", fontFamily="embeddedBirchStd", cff="embedAsCFF",
                unicodeRange="U+0041-U+005A, U+0061-U+007A, U+003F")]
        public var embeddedBirchStdFont:Class;
        
        public function callInContext(fn:Function, thisArg:Object, argsArray:Array, returns:Boolean=true):*
        {
            if (returns)
                return fn.apply(thisArg, argsArray);
            fn.apply(thisArg, argsArray);
        }
    }
}

package flashx.textLayout.compose.examples {
    import flash.display.Loader;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.net.URLRequest;
    import flash.text.engine.FontLookup;
    
    import flashx.textLayout.compose.StandardFlowComposer;
    import flashx.textLayout.container.ContainerController;
    import flashx.textLayout.conversion.TextConverter;
    import flashx.textLayout.elements.Configuration;
    import flashx.textLayout.elements.TextFlow;
    import flashx.textLayout.formats.TextLayoutFormat;
    
    public class FontConsumer extends Sprite
    {
        private var fontSWF:Loader = new Loader();    
        
        public function FontConsumer()
        {
            var fontSWFURL:URLRequest = new URLRequest("EmbeddedFontLineCreator.swf");
            fontSWF.contentLoaderInfo.addEventListener( Event.COMPLETE, createFlow );
            fontSWF.load( fontSWFURL );    
        }
        
        private function createFlow( event:Event ):void
        {
            var container:Sprite = new Sprite();
            this.addChild( container );
            var controller:ContainerController = new ContainerController( container, 600, 700 );
            
            var format:TextLayoutFormat = new TextLayoutFormat();
            format.fontFamily = "embeddedBirchStd";
            format.fontLookup = FontLookup.EMBEDDED_CFF;
            
            var config:Configuration = new Configuration();
            config.textFlowInitialFormat = format;
            
            var flow:TextFlow = TextConverter.importToFlow( "Shall I compare thee to a summer's day?", TextConverter.PLAIN_TEXT_FORMAT, config );
            flow.flowComposer = new StandardFlowComposer();
            
            var embeddedFontLineCreator:Class = fontSWF.contentLoaderInfo.applicationDomain.getDefinition( "flashx.textLayout.compose.examples.EmbeddedFontLineCreator" ) as Class;
            flow.flowComposer.swfContext = new embeddedFontLineCreator();
            
            flow.flowComposer.addController( controller );
            flow.flowComposer.updateAllControllers();
        }
    }
}