Check xul structure

analyze_xul_structure.js

let fs = require("fs");
var {
  Parser
} = require("saxen");

function structure(filename) {
  let contents = fs.readFileSync(filename, "utf8");
  let parser = new Parser();
  let indent = 0;
  let out = "";
  parser.on("openTag", function(elementName, attrGetter, decodeEntities, selfClosing, getContext) {
    out += " ".repeat(indent) + elementName + "\n";
    indent += 2;
  });
  parser.on("closeTag", function(elementName, attrGetter, decodeEntities, selfClosing, getContext) {
    indent -= 2;
    // out += " ".repeat(indent) + ">" + elementName + "\n";
  });
  parser.ns({
    "http://www.w3.org/1999/xhtml": "html",
    "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul": "xul",
  });
  parser.parse(contents);
  return out;
}

function files(filename) {
  let contents = fs.readFileSync(filename, "utf8");
  return contents.split("\n").map((name) => "../../gecko/" + name);
}

function counts(filenames) {
  let unique = {};
  let errors = 0;
  let errorFiles = [];
  for (filename of filenames) {
    let struct;
    try {
      struct = structure(filename);
    } catch (e) {
      errors++;
      errorFiles.push(filename);
    }
    if (unique[struct]) {
      unique[struct].count++;
      unique[struct].files.push(filename);
    } else {
      unique[struct] = { count: 1, files: [filename], struct: struct };
    }
  }
  let sorted = [];
  for (var key in unique) {
    sorted.push(unique[key]);
  }
  sorted.sort((a, b) => (a.count > b.count) ? 1 : -1);
  let onlyOne = 0;
  for (let i = 0; i < sorted.length; i++) {
    if (sorted[i].count == 1) {
      onlyOne++;
    }
  }
  console.log("Last: ");
  for (let i = sorted.length - 25; i < sorted.length; i++) {
    console.log(sorted[i].count + " " + sorted[i].struct);
    console.log(sorted[i].files);
    // for (let j = 0; j < sorted[i].files.length; j++) {
    //   console.log()
    // }
  }
  console.log("Errors: " + errors);
  console.log("Only one: " + onlyOne);
  console.log("Number of unique structures: " + sorted.length);
  // return sorted;
}

// test "../../gecko/xpfe/appshell/test/test_hiddenPrivateWindow.xul"

let xulFiles = files("xul_files.txt");
counts(xulFiles);

// structure();