data:image/svg+xml;base64,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

<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" height="16" width="16">
    <path d="M 12.4,16 C 10.1,15.5 9.04,12.8 10.5,11 12.3,8.73 16,10 16,12.9 16,14.8 14.2,16.3 12.4,16 Z M 11.6,14.8 11.9,14.7 13,13.6 C 14,12.5 14,12.5 13.9,12.3 13.8,12.2 13.7,12.2 13,13 12.3,13.6 12.3,13.7 12.2,13.5 12.2,13.5 12.4,13.3 12.9,12.8 13.6,12.1 13.6,12 13.5,11.9 13.3,11.8 13.3,11.8 12.2,12.9 L 11.1,14 11.1,14.3 C 10.9,14.9 10.9,14.9 11.6,14.8 Z M 14.6,12 C 14.9,11.6 14.9,11.6 14.6,11.3 14.2,10.9 14.2,10.9 13.8,11.3 13.4,11.6 13.4,11.6 13.8,12 14.2,12.4 14.2,12.4 14.6,12 Z M 2.81,15.7 C 1.68,15.4 0.403,14.2 0.097,13 -0.103,12.3 0.025,11.4 0.437,10.7 0.632,10.4 3.75,7.15 4.22,6.85 4.71,6.48 5.23,6.29 5.87,6.25 L 6.25,6.25 6.25,5.87 C 6.29,5.23 6.48,4.71 6.85,4.22 7.08,3.84 10.4,0.61 10.6,0.456 12.2,-0.471 14.1,0.088 15.3,1.86 16,2.87 15.9,4.33 15.2,5.35 14.9,5.68 11.7,8.88 11.5,9.04 11,9.34 10.5,9.52 9.9,9.56 L 9.56,9.56 9.56,9.75 C 9.56,10.2 9.41,10.9 9.15,11.3 8.92,11.7 5.72,14.9 5.27,15.2 4.52,15.7 3.63,15.9 2.81,15.7 Z M 3.88,14.3 C 4.33,14.2 4.4,14.1 6.14,12.4 7.91,10.6 7.94,10.6 8.06,10.1 8.09,9.86 8.09,9.52 7.98,9.26 7.87,8.92 7.91,8.92 7.19,9.64 6.78,10 6.48,10.3 6.4,10.3 5.84,10.6 5.23,9.98 5.46,9.37 5.5,9.34 5.8,9 6.14,8.62 6.85,7.91 6.85,7.91 6.51,7.79 6.1,7.64 5.5,7.72 5.12,7.98 4.71,8.24 1.71,11.3 1.6,11.6 1.4,12 1.43,12.6 1.69,13.1 1.86,13.4 2.54,14 2.83,14.2 3.21,14.3 3.49,14.4 3.88,14.3 Z M 10.2,8.02 C 10.6,7.94 10.7,7.87 12.4,6.14 14.2,4.29 14.2,4.33 14.3,3.8 14.4,3.12 14,2.38 13.2,1.78 12.8,1.45 12.1,1.37 11.6,1.6 11.3,1.72 8.17,4.78 7.94,5.16 7.72,5.5 7.64,6.1 7.79,6.51 7.91,6.89 7.91,6.89 8.62,6.14 9,5.8 9.34,5.5 9.37,5.46 9.98,5.23 10.6,5.84 10.3,6.4 10.3,6.48 10,6.78 9.64,7.19 8.92,7.91 8.92,7.91 9.3,8.02 9.6,8.09 9.9,8.09 10.2,8.02 Z" style="fill:#787b7f" />
</svg>

let handler = ev => {
      evf(m => xhr.removeEventListener(m, handler, !1));
      var reURL = null;
      switch (ev.type) {
        case 'load':
          if (xhr.status == 200 || xhr.responseURL != aURL) {
            reURL = xhr.responseURL;
            cb(reURL);
            options.showAlert && (options.clickAlertToOpen
                                  ? alertsService.showAlertNotification(self.image, self.label,
                                                                        'Ссылка раскукожена!\nНажмите, чтобы открыть в новой вкладке:\n' + reURL,
                                                                        true, null, alertListener, "")
                                  : alertsService.showAlertNotification(self.image, self.label,
                                                                        'Ссылка раскукожена:\n' + reURL,
                                                                        false, "", null, ""));
            break;
          }

        default:
          cb(reURL);
          options.showAlert && alertsService.showAlertNotification(self.image, self.label,
                                                                   'Ошибка при попытке получить ссылку: ' + xhr.statusText + ' [' + ev.type + ':' + xhr.status + ']',
                                                                   false, "", null, "");
          break;
      }
    };

((cntxtMenu, elm, mItem) => {
  mItem.id = "cb-unshorten-url";
  mItem.setAttribute("label", "Раскукожить ссылку");
  mItem.setAttribute("class", "menuitem-iconic");
  mItem.setAttribute("image", self.image);
  elm.parentNode.insertBefore(mItem, elm);

  const alertsService = Cc["@mozilla.org/alerts-service;1"].getService(Ci.nsIAlertsService);

  var url, link, isUnshortened,
      shortenerServices = [
        "tinyurl.com",
        "po.st",
        "img.ly",
        "bit.ly",
        "goo.gl",
        "youtu.be",
        "t.co",
        "db.tt",
        "u.to"
      ],
      options = {
        replaceShortenedLinks: true,
        showAlert: true,
        clickAlertToOpen: true,
        showOnShortenedTextLinks: true,
        promptDialogForTextLinks: true,
        copyToClipboard: true,
        changeColorForUnshortenedLinks: true,
        changeColorBackAfterTimeout: true,
        unshortenedLinksColor: "lightgreen"
      };

  function isShortenedURL(aURL) {
    var uri;
    try {uri = makeURI(aURL)} catch(e) {};

    if (uri && shortenerServices.indexOf(uri.host) !== -1)
      return true;
    else
      return false;
  };

  function xhr(aURL, cb) {
    if (!aURL) {
      options.showAlert && alertsService.showAlertNotification(self.image, self.label,
                                                               'Неправильная ссылка!', false, "", null, "");
      return;
    }

    var alertListener = {
      observe: function(aSubject, aTopic, aData) {
        if (aTopic != 'alertclickcallback') return;
        gBrowser.selectedTab = gBrowser.addTab(xhr.responseURL);
      }
    }

    let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
    let handler = ev => {
      evf(m => xhr.removeEventListener(m, handler, !1));
      var reURL = null;
      switch (ev.type) {
        case 'load':
          if (xhr.status == 200 || xhr.responseURL != aURL) {
            reURL = xhr.responseURL;
            cb(reURL);
            options.showAlert && (options.clickAlertToOpen
                                  ? alertsService.showAlertNotification(self.image, self.label,
                                                                        'Ссылка раскукожена!\nНажмите, чтобы открыть в новой вкладке:\n' + reURL,
                                                                        true, null, alertListener, "")
                                  : alertsService.showAlertNotification(self.image, self.label,
                                                                        'Ссылка раскукожена:\n' + reURL,
                                                                        false, "", null, ""));
            break;
          }

        default:
          cb(reURL);
          options.showAlert && alertsService.showAlertNotification(self.image, self.label,
                                                                   'Ошибка при попытке получить ссылку: ' + xhr.statusText + ' [' + ev.type + ':' + xhr.status + ']',
                                                                   false, "", null, "");
          break;
      }
    };

    let evf = f => ['load', 'error', 'abort'].forEach(f);
    evf(m => xhr.addEventListener(m, handler, false));

    xhr.mozBackgroundRequest = true;
    xhr.open('HEAD', aURL, true);
    xhr.channel.loadFlags |= Ci.nsIRequest.LOAD_ANONYMOUS | Ci.nsIRequest.LOAD_BYPASS_CACHE | Ci.nsIRequest.INHIBIT_CACHING;
    xhr.setRequestHeader("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)", false);
    xhr.setRequestHeader("Accept", "text/html,text/xml", false);
    xhr.send(null);
  };

  function shouldDisplay() {
    if (gContextMenu.onLink && !gContextMenu.isTextSelected) {
      url = gContextMenu.getLinkURL();
      link = gContextMenu.link;
      isUnshortened = link.getAttribute("cb-short-url");
      mItem.label = isUnshortened ? "Скукожить ссылку" : "Раскукожить ссылку";
    }

    if (gContextMenu.onPlainTextLink && !gContextMenu.isTextSelected)
      url = gContextMenu.getLinkURL();

    if (gContextMenu.isTextSelected)
      url = document.commandDispatcher.focusedWindow.content.document.getSelection().toString().trim();

    mItem.hidden = !((gContextMenu.onLink || (gContextMenu.onPlainTextLink || gContextMenu.isTextSelected)
                      && options.showOnShortenedTextLinks) && isShortenedURL(url)
                     || gContextMenu.onLink && isUnshortened);
  };

  function promptDialog(aURL) {
    var input = {value: aURL};
    var prompt = Services.prompt.prompt(null, options.copyToClipboard ? "Раскукоженная ссылка скопирована!" : "Ссылка раскукожена!",
                                        "Отредактировать и открыть в новой вкладке?",
                                        input, null, {value: false});
    if (prompt)
      gBrowser.selectedTab = gBrowser.addTab(input.value);
  };

  mItem.onclick =()=> {
    if (gContextMenu.onLink && !gContextMenu.isTextSelected) {
      if (!isUnshortened) {
        if (options.changeColorForUnshortenedLinks) {
          link.style.color && link.setAttribute('cb-old-color', link.style.color);
          link.style.setProperty("color", "orangered", "important");

          var oldClr = link.getAttribute('cb-old-color');
        }

        xhr(url, reURL => {
          if (!reURL) {
            options.changeColorForUnshortenedLinks
              && (oldClr ? (link.style.setProperty("color", oldClr, "important"),
                            link.removeAttribute('cb-old-color')) : link.style.removeProperty("color"));
            return;
          }

          if (options.changeColorForUnshortenedLinks) {
            link.style.setProperty("color", options.unshortenedLinksColor, "important");
            options.changeColorBackAfterTimeout
              && setTimeout(()=> oldClr ? (link.style.setProperty("color", oldClr, "important"),
                                           link.removeAttribute('cb-old-color')) : link.style.removeProperty("color"), 1000);
          }

          options.copyToClipboard && gClipboard.write(reURL);

          options.replaceShortenedLinks && (link.setAttribute("cb-short-url", link.href),
                                            link.setAttribute("href", reURL));
        })
      }
      else {
        oldClr ? (link.style.setProperty("color", oldClr, "important"),
                  link.removeAttribute('cb-old-color')) : link.style.removeProperty("color");

        link.setAttribute("href", isUnshortened);
        link.removeAttribute("cb-short-url");
      }
    }
    else {
      xhr(url, reURL => {
        if (!reURL) return;
        options.copyToClipboard && gClipboard.write(reURL);
        options.promptDialogForTextLinks && promptDialog(reURL);
      })
    }
  };

  this._handleClick =()=> {
    url = gClipboard.read();
    if (!(url && isShortenedURL(url))) {
      options.showAlert && alertsService.showAlertNotification(self.image, self.label,
                                                               'Неправильная ссылка!', false, "", null, "");
      return;
    }

    xhr(url, reURL => {
      if (!reURL) return;

      options.copyToClipboard && gClipboard.write(reURL);
      promptDialog(reURL);
    })
  };

  cntxtMenu.addEventListener("popupshowing", shouldDisplay, false);

  addDestructor(()=> {
    cntxtMenu.removeEventListener("popupshowing", shouldDisplay, false);
    cntxtMenu.removeChild(mItem);
  });
})(document.getElementById("contentAreaContextMenu"), document.getElementById("context-sep-open"), document.createElement("menuitem"));