Layer comps ID and name

So, I figured it out... generator turned out to be a wild goose chase because the schema it prints for a document isn't the same schema that is used by ActionDescriptors. I figured out how to create a function that would print out all the keys in a descriptor:

function printKeysFromActionDesc( atnDesc )
{
    for( var i=0; i<atnDesc.count; i++ ){
        var key = atnDesc.getKey(i);
        $.writeln( typeIDToStringID(key) );
    }
}
then using this I was able to start inspecting wtf the real schema was.

the value of the currently selected layer comp on a smart object is under "smartObjectMore" > "comp"

here's some of Max's code modified:

  // get application description object
  var actref1 = new ActionReference();
  actref1.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
  var appDesc = executeActionGet(actref1);
  
  // get layer count from app description
  var layerCount = appDesc.getInteger(stringIDToTypeID("numberOfLayers"));
  
  // process layers
  for (var l = 0; l <= layerCount; l++) {
      
      var actref2 = new ActionReference();
      actref2.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
      actref2.putIndex( charIDToTypeID( "Lyr " ), l);
      
      var layerDesc;
      try{ layerDesc = executeActionGet(actref2); }
      catch(e){ continue; }
      
      var isSmartObject = layerDesc.hasKey(stringIDToTypeID('smartObject'));
      if(isSmartObject)
      {
        // get object descriptors
        var soDesc = layerDesc.getObjectValue(stringIDToTypeID('smartObject'));
        var soMoreDesc = layerDesc.getObjectValue(stringIDToTypeID('smartObjectMore'));
        var compsDesc = soDesc.getObjectValue(stringIDToTypeID('compsList'));
        var compList = compsDesc.getList(stringIDToTypeID('compList'));
         var compObjDesc = compList.getObjectValue(2);
        
        $.writeln ( "name: " + compObjDesc.getString(stringIDToTypeID('name')) );
        $.writeln ( "id: " + compObjDesc.getInteger(stringIDToTypeID('ID')) );
        $.writeln ( "comp: " + soMoreDesc.getInteger(stringIDToTypeID('comp')) );        
      }
  }
  

Within that code block, you can see getting a layer's comp and a list of all possible comps in "compList". (NOTE: "compList" is inside "compsList")

I also suspect that within "smartObjectMore", you can get the same data as "compsList" under "compInfo"

So, I think I can answer the 2 original questions in this thread now:

1) Is it possible to switch layer comp in document by layer comp ID somehow?

Yes, if you install the ScriptListener photoshop plugin, you can see the code required to do this which looks something like:

var idsetPlacedLayerComp = stringIDToTypeID( "setPlacedLayerComp" );     var desc11 = new ActionDescriptor();     var idnull = charIDToTypeID( "null" );         var ref9 = new ActionReference();         var idLyr = charIDToTypeID( "Lyr " );         var idOrdn = charIDToTypeID( "Ordn" );         var idTrgt = charIDToTypeID( "Trgt" );         ref9.putEnumerated( idLyr, idOrdn, idTrgt );     desc11.putReference( idnull, ref9 );     var idcompID = stringIDToTypeID( "compID" );     desc11.putInteger( idcompID, 1770071028 ); executeAction( idsetPlacedLayerComp, desc11, DialogModes.NO );

I haven't tried this myself, but I'm guessing that this code is implying that a null value means that the compID will be applied to the selected layer.

2) Is it possible to get layer comp name, if you know layer comp ID (and vice versa)?

yep, if you pull the compList as in my earlier example, you'll have an array of all the layer comps including "name" and "ID" which should give you what you need to lookup either one.

there's info on getting data passed from extend script to generator

Could you please post a link to that info?