Flashでタイムラインを指定倍率で拡大縮小する

ExpandTimeline.jsfl

/**
 * Expand Timeline
 */
var _doc = fl.getDocumentDOM();
var _tl = _doc.getTimeline();

var _rate = parseFloat(prompt("Input rate.", "2"))
if(!isNaN(_rate) && _rate != 1 && _rate > 0){
	main();
}
else{
	alert("NG");
}
function main(){
	var layerList = _tl.layers;
	for(var l = 0, len = layerList.length; l < len; l++){
		var layer = layerList[l];
		var frameList = layer.frames;
		_tl.setSelectedLayers(l);
		if(_rate > 1){
			for(var f = frameList.length - 1; f > 0; f--){
				if(f == frameList[f].startFrame){
					moveFrame(f, Math.ceil(f*_rate));
				}
			}
		}
		else{
			var fin = 0;
			var num = frameList.length
			for(var f = 1; f < num; f++){
				if(f == frameList[f].startFrame){
					moveFrame(f, ~~(f*_rate));
					fin = f;
				}
			}
			_tl.removeFrames(~~(fin*_rate), num - 1);
		}
	}
}


function moveFrame(f, targetF){
	_tl.setSelectedFrames(f, f);
	_tl.copyFrames(f);
	_tl.pasteFrames(targetF);
	_tl.clearKeyframes(f);
}