Scripting layer comps of smart objects

Panels are persistent and do not »steal« focus, dialogs do take focus for as long as they are presented. 

So please clarify which behaviour you are after exactly. 

If you are fine with a ESTK-dialog this might provide a stepping stone; the function collects the Smart Object instances that have Layer Comps. 

With this it should be possible populate a dialog and then use the Layers’ IDs to apply a selected Layer Comp (via its ID) to all the instances of a specific Smart Object. 

// 2023, use it at your own risk;
if (app.documents.length > 0) {
var theThings = collectSmartObjectsWithLayerComps();
alert (theThings.length+" smart object instances with layer comps\n\n"+theThings.join("\n\n"));
};
////////////////////////////////////
////// collect smart objects, probably based on code by paul, mike or x //////
function collectSmartObjectsWithLayerComps () {
// the file;
var myDocument = app.activeDocument;
// get number of layers;
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); 
var applicationDesc = executeActionGet(ref);
var theNumber = applicationDesc.getInteger(stringIDToTypeID("numberOfLayers"));
// process the layers;
var theLayers = new Array;
for (var m = 0; m <= theNumber; m++) {
try {
var ref = new ActionReference();
ref.putIndex( charIDToTypeID( "Lyr " ), m);
var layerDesc = executeActionGet(ref);
var layerSet = typeIDToStringID(layerDesc.getEnumerationValue(stringIDToTypeID("layerSection")));
var isBackground = layerDesc.getBoolean(stringIDToTypeID("background"));
// if not layer group collect values;
if (layerSet != "layerSectionEnd" && layerSet != "layerSectionStart" && isBackground != true) {
var theName = layerDesc.getString(stringIDToTypeID('name'));
var theID = layerDesc.getInteger(stringIDToTypeID('layerID'));
if(layerDesc.hasKey(stringIDToTypeID('smartObject'))) {
    var soDesc = layerDesc.getObjectValue(stringIDToTypeID('smartObject'));
    var theFileRef = soDesc.getString(stringIDToTypeID('fileReference'));
    var theDocID = soDesc.getString(stringIDToTypeID('documentID'));
    var x = soDesc.getList(stringIDToTypeID("compsList"));
    var theCompsList = soDesc.getObjectValue(stringIDToTypeID("compsList"));
    if (theCompsList.count > 2) {
        var theCompsList = theCompsList.getList(stringIDToTypeID("compList"));
        var theSOComps = new Array;
        for (var n = 0; n < theCompsList.count; n++) {
        var thisOne = theCompsList.getObjectValue(n);
        var compName = thisOne.getString(stringIDToTypeID("name"));
        var compID = thisOne.getInteger(stringIDToTypeID("ID"));
        var theComment = thisOne.getString(stringIDToTypeID("comment"));
        theSOComps.push([compName, compID, theComment]);
        };
    theLayers.push([theName, theID, theFileRef, theDocID, theSOComps])
    };
//    theLayers.push([theName, theID, theFileRef, theDocID])
}
};
}
catch (e) {};
};
return theLayers
};