gecko-dev/xpcom/tests/TestWinReg.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * This script is intended to be run using xpcshell
 */

const nsIWindowsRegKey = Ci.nsIWindowsRegKey;
const BASE_PATH = "SOFTWARE\\Mozilla\\Firefox";

function idump(indent, str) {
  for (var j = 0; j < indent; ++j) {
    dump(" ");
  }
  dump(str);
}

function list_values(indent, key) {
  idump(indent, "{\n");
  var count = key.valueCount;
  for (var i = 0; i < count; ++i) {
    var vn = key.getValueName(i);
    var val = "";
    if (key.getValueType(vn) == nsIWindowsRegKey.TYPE_STRING) {
      val = key.readStringValue(vn);
    }
    if (vn == "") {
      idump(indent + 1, '(Default): "' + val + '"\n');
    } else {
      idump(indent + 1, vn + ': "' + val + '"\n');
    }
  }
  idump(indent, "}\n");
}

function list_children(indent, key) {
  list_values(indent, key);

  var count = key.childCount;
  for (var i = 0; i < count; ++i) {
    var cn = key.getChildName(i);
    idump(indent, "[" + cn + "]\n");
    list_children(indent + 1, key.openChild(cn, nsIWindowsRegKey.ACCESS_READ));
  }
}

// enumerate everything under BASE_PATH
var key = Cc["@mozilla.org/windows-registry-key;1"].createInstance(
  nsIWindowsRegKey
);
key.open(
  nsIWindowsRegKey.ROOT_KEY_LOCAL_MACHINE,
  BASE_PATH,
  nsIWindowsRegKey.ACCESS_READ
);
list_children(1, key);

key.close();
key.open(
  nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
  BASE_PATH,
  nsIWindowsRegKey.ACCESS_READ
);
list_children(1, key);