edit-lighthouse-comments.user.js

// ==UserScript==
// @name           lighthouse: Edit your comments
// @description    Adds ability to edit your own ticket comments.
// @include        https://*.lighthouseapp.com/projects/*/tickets/*
//
// Mouseover the comment and an edit button will appear to the
// top-right of the comment.
// ==/UserScript==

(function(global, form) {
  form = document.forms &&
  form.length > 1 &&
  (form = form[2].action) &&
  global.$$('ul.info .tticket').each(function(element, i) {
    var version, match = element.readAttribute('id').match(/-\d+-(\d+)$/);
    if (match && !element.hasClassName('attachment')) {
      version = match[1];
      element
        .insert("<a href='" + form + "/versions/" + version + "' class='edit' style='display:none'>edit</a>")
        .observe('mouseover', function() {
          element.down('.edit').show();
        })
        .observe('mouseout', function() {
          element.down('.edit').hide();
        });
    }
  });
})(this.unsafeWindow || this);