UpgradeToLayers.jsfl

var gDidClearOutputPanel = false;
function trace(str)
{
    if (!gDidClearOutputPanel) {
        fl.outputPanel.clear();
        gDidClearOutputPanel = true;
    }
    
    fl.outputPanel.trace(str);
}



function isInstanceOk(instance)
{
    if (instance.name && instance.name != "") {
        return false
    }

    if (instance.libraryItem) {
        // Don't promote piano keys, as we need to maintain their depth
        var blackList = [
            "Shared/Black Key",
            "Shared/Highlighted Black Key",
            "Shared/White Key",
            "Shared/Highlighted White Key",
            "Shared/Small Keyboard - Black Key",
            "Shared/Small Keyboard - Highlighted Black Key",
            "Shared/Small Keyboard - White Key",
            "Shared/Small Keyboard - Highlighted White Key"
        ];
    
        var name = instance.libraryItem.name;
        for (var i = 0; i < blackList.length; i++) {
            if (name == blackList[i]) {
                return false;
            }
        }
    }

    return true;
}


function processSymbolInstance(instance, layerID)
{
    if (isInstanceOk(instance)) {
        trace("Upgrading " + instance);

        if (instance.symbolType == "graphic") {
            instance.symbolType = "movie clip";
        }

        instance.name = "_layer_" + layerID;
    }
}


function processFrame(frame, layerID)
{
    var elements = frame.elements;
    for (var i = 0; i < elements.length; i++) {
        if (elements[i].symbolType) {
            processSymbolInstance(elements[i], layerID);
        }
    }
}


function processDocument(document)
{
    var timeline = document.getTimeline();
    var layers   = timeline.layers;

    var layerID = 0;

    for (var i = 0; i < layers.length; i++) {
        var frames = layers[i].frames;
        var lastWasMotion = false;
        var needsNewID    = false;
    
        for (var j = 0; j < frames.length; j++) {
            var frame = frames[j];
            if (frame.tweenType == "motion") {
                if (needsNewID) {
                    ++layerID;
                    needsNewID = false;
                }

                processFrame(frame, layerID);
                lastWasMotion = true;

            } else if (lastWasMotion) {
                processFrame(frame, layerID);
                lastWasMotion = false;
                needsNewID = true;

            } else {
                needsNewID = true;
            }
        }
    }

}

processDocument(fl.getDocumentDOM());