check-parentheses.js

CmdUtils.CreateCommand({
  names: ["check parentheses"],
  icon: "http://www.mozilla.com/favicon.ico",
  description: "Does a simple arithmetic check to see if a selected line of code has enough parentheses.",
  //help: "How to use your command.",
  author: {name: "Duncan Johnson", email: "duncan@duncanandmeg.org"},
  license: "GPL",
  homepage: "http://andyanglea.com/blog/2009/08/if-problems/",
  arguments: [{role: 'object', nountype: noun_arb_text}],
  preview: function preview(pblock, args) {
    pblock.innerHTML = "Your input is <b>" + args.object.html + "</b>.";
  },
  execute: function execute(args) {
    var charArray = args.object.text.split("");
    var test1Integer = 0;
    for (var item in charArray) {
      if (charArray[item] == "(") {
        test1Integer = test1Integer + 1;
      } else if (charArray[item] == ")") {
        test1Integer = test1Integer - 1;
      }
    }
    if (test1Integer !== 0) {
      displayMessage ("There is an error in the selected line");
    } else { displayMessage ("No error detected \(but you still might have bad code, this is no guarantee\)"); 
  }
});