GistBox copy code on double click

gistbox_userscript_copycode.js

// ==UserScript==
// @name       GitBox extra features
// @namespace  https://www.facebook.com/sergii.tk
// @version    0.1
// @description  Copies code blocks to clipboard
// @match      https://app.gistboxapp.com/*
// @copyright  2013+, Sergii Tkachenko
// @require https://raw.github.com/rafjaf/ClipCopy-for-TM/master/lib/installGM_setClipboard.js
// ==/UserScript==

// Tested with tampermonkey 3.5.3630.44.
// https://chrome.google.com/webstore/detail/gcalenpjmijncebpfijmoaglllgpjagf
function gitbox_extra_save_to_clipboard(text, text_copied) {
  if (text_copied == null) {
    text_copied = "Copied!";
  }

  GM_setClipboard(text);
  notyfy({text: text_copied, layout: 'topRight', type: 'Success', timeout: 2000});
}

// Copy code tags with double click.
$(document).on('dblclick', '.gist-file-code code', function() {
  gitbox_extra_save_to_clipboard($(this).text());
})