Listing all fonts used in a document?

Question

   As I understand it, TextFonts is a collection of all fonts available to Illustraot.  Is there a collection of all fonts used in the open document?  Or would I have to step through every textFrame an create that list myself?

Answer 1

I don't know why and how you write error log, so I only add a single alert after all. "xmpString" and "XMP library" are two different methods, you only need one of then.
#target illustrator
var inputFolder = Folder.selectDialog("Select a folder contains '*.eps' files ");
if (inputFolder) {
    var fileList = inputFolder.getFiles('*.eps'),
        fontsInfo = [];
    loadXMPLibrary();
    for (var i = 0; i < fileList.length; i++) {
        if (fileList[i] instanceof File && fileList[i].hidden == false) {
            fontsInfo.push(getFontsInfo(fileList[i]));
    unloadXMPLibrary();
var Loginfo = new File(inputFolder + '/Font.info.txt');
Loginfo.open('w', 'TEXT', '????');
var info = fontsInfo.join('\n\n');
Loginfo.write(info);
Loginfo.close();
if (/(Open Type|TrueType)/.test(info)) {
    alert('Open Type / TrueType font found, see log file for details!')
function getFontsInfo(file) {
    var arr = ['File: ' + decodeURI (file.name)],
        xmpFile, oXmp, fontNumber, i, path, fontname, fonttype, ns = 'http://ns.adobe.com/xap/1.0/t/pg/';
    xmpFile = new XMPFile(file.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_READ);
    oXmp = xmpFile.getXMP(); //Returns an XMPMeta object
    fontNumber = oXmp.countArrayItems(ns, 'xmpTPg:Fonts');
    xmpFile.closeFile(XMPConst.CLOSE_UPDATE_SAFELY);
    if (fontNumber) { // if there's at least 1 font, proceed
        for (i = 1; i <= fontNumber; i++) {
            path = XMPUtils.composeArrayItemPath(ns, 'xmpTPg:Fonts', i);
            fontname = oXmp.getStructField(ns, path, XMPConst.TYPE_FONT, 'fontName');
            fonttype = oXmp.getStructField(ns, path, XMPConst.TYPE_FONT, 'fontType');
            arr.push([i, '. ', fontname, '-', fonttype].join(''));
    return arr.join('\n');
function loadXMPLibrary() {
    if (!ExternalObject.AdobeXMPScript) {
        try {
            ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');
        } catch (e) {
            alert('Unable to load the AdobeXMPScript library!');
            return false;
    return true;
function unloadXMPLibrary() {
    if (ExternalObject.AdobeXMPScript) {
        try {
            ExternalObject.AdobeXMPScript.unload();
            ExternalObject.AdobeXMPScript = undefined;
        } catch (e) {
            alert('Unable to unload the AdobeXMPScript library!');