How to get info from a layer which is applied with styles ?

xtools/xlib/Styles.js has a set of functions for working with layer styles. I do not know if it works with CS. I wrote it several years ago for either CS or CS2. If this doesn't work, then nothing will. The script retrieves a layer's style by saving it to disk then parsing the file for the desired ActionDescriptor.

There is a function at the bottom of the file that tests the Styles.js API.

Styles.test = function() {
  var doc = app.activeDocument;
  var layer0 = doc.artLayers[0];
  var gdesc = Styles.getLayerStyleDescriptor(doc, layer0);
  if (!gdesc) {
    alert("There is no layer style associated with the layer");
    return;
  }
//   this will set the layer style to another layer.
//   var layer1 = doc.artLayers[1];
//   Styles.setLayerStyleDescriptor(doc, layer1, gdesc);
  if (!gdesc.hasKey(cTID('FrFX'))) {  // look for a stroke effect
    return;
  }
  var frfx = gdesc.getObjectValue(cTID('FrFX'));
  if (!frfx.hasKey(cTID('Clr '))) {   // look for the color
    return;
  }
  var clr = frfx.getObjectValue(cTID('Clr '));
  // we should really check that the objectType is RGBC
  var r = clr.getDouble(cTID('Rd  '));
  var g = clr.getDouble(cTID('Grn '));
  var b = clr.getDouble(cTID('Bl  '));
  if (r == 0 && g == 0xFF && b == 0xFF) {
    return;
  }
  clr.putDouble(cTID('Rd  '), 0);
  clr.putDouble(cTID('Grn '), 0xFF);
  clr.putDouble(cTID('Bl  '), 0xFF);
  frfx.putObject(cTID('Clr '), cTID('RGBC'), clr);
  gdesc.putObject(cTID('FrFX'), cTID('FrFX'), frfx);
  Styles.setLayerStyleDescriptor(doc, layer0, gdesc);
};