Openstreetmapru bookmarklet sources

(function() {
  var latlon, lat, lon, isYandex, zoom, map, x, y, ymax;

  function getLonByX(x, zoom) {
    try {
      return x / Math.pow(2, zoom) * 360 - 180;
    } catch(e) {}
  }

  function getLatByY(y, zoom) {
    try {
      var n = Math.PI - 2 * Math.PI * y / Math.pow(2, zoom);
      return 180 / Math.PI * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n)));
    } catch(e) {}
  }

  function goByUrl(url) {
    try {
      url = decodeURIComponent(url);
    } catch(e) {}

    // Common style
    lat = (lat = /(?:lat|latitude|fLat|\Wlt)[^\d-]+([\d.-]*)/.exec(url)) === null ? lat : lat[1];
    lon = (lon = /(?:lon|lng|long|longitude|fLon|\Wln)[^\d-]+([\d.-]*)/.exec(url)) === null ? lon : lon[1];
    zoom = (zoom = /(?:zoom|zl|\Wz)\D*([\d.]*)/.exec(url)) === null ? '14' : zoom[1];
    if (go()) return true;

    // Yandex and old Google style
    latlon = (latlon = /ll=([\d.,-]*)/.exec(url)) === null ? latlon : latlon[1].split(',');

    if (latlon && latlon.length > 1) {
      isYandex = /\/\/[^\/]*yandex/.test(url) | 0;
      lon = latlon[1 - isYandex];
      lat = latlon[isYandex];
      if (go()) return true;
    }

    // New Google style
    latlon = /@([\d.-]*),([\d.-]*),(\d+)z/.exec(url);
    if (latlon) {
      lat = latlon[1];
      lon = latlon[2];
      zoom = latlon[3];
      if (go()) return true;
    }

    // Openstreetmap new style
    latlon = /(\d+)\/(-?\d+\.\d+)\/(-?\d+\.\d+)/.exec(url);
    if (latlon) {
      lat = latlon[2];
      lon = latlon[3];
      zoom = latlon[1];
      if (go()) return true;
    }

    // 2Gis style
    latlon = /(-?\d+\.\d+),(-?\d+\.\d+)\/zoom\/(\d+)/.exec(url);
    if (latlon) {
      lat = latlon[2];
      lon = latlon[1];
      zoom = latlon[3];
      if (go()) return true;
    }

    // OSM/TMS tile
    latlon = /(\d+)\/(-?\d+)\/(-?\d+)/.exec(url);
    if (latlon) {
      zoom = parseInt(latlon[1]);
      y = parseInt(latlon[3]);
      x = parseInt(latlon[2]);
      lat = getLatByY(y, zoom);
      lon = getLonByX(x, zoom);
      go(true);

      // TMS URL
      ymax = 1 << zoom;
      y = ymax - y - 1;
      lat = getLatByY(y, zoom);
      lon = getLonByX(x, zoom);
      if (go()) return true;
    }

    // x/y tile
    x = /x=(\d+)/.exec(url);
    y = /y=(\d+)/.exec(url);
    zoom = /z=(\d+)/.exec(url);
    if (x !== null && y !== null && zoom !== null) {
      x = parseInt(x[1]);
      y = parseInt(y[1]);
      zoom = parseInt(zoom[1]);
      lat = getLatByY(y, zoom);
      lon = getLonByX(x, zoom);
      go(true);

      // TMS URL
      ymax = 1 << zoom;
      y = ymax - y - 1;
      lat = getLatByY(y, zoom);
      lon = getLonByX(x, zoom);
    }

    return go();
  }

  function goBySelectedUrls(selector, urlAttribute) {
    var elements = document.querySelectorAll(selector);
    var length = elements.length > 500 ? 500 : elements.length;
    for (var i = 0; i < length; i++)
      if (goByUrl(elements[i][urlAttribute])) return true;
  }

  function go(inNewWindow) {
    if (!(lat && lon)) return;

    var url = 'http://openstreetmap.ru/#map=' + zoom + '/' + lat + '/' + lon;

    if (inNewWindow)
      window.open(url);
    else
      window.location = url;
    return true;
  }

  if (goByUrl(window.location.href)) return;

  // Vkontakte
  map = window.placeMap || (window.cur ? window.cur.placeMap : null);
  if (map) {
    latlon = map.getCenter();
    lat = latlon.lat;
    lon = latlon.lon;
    zoom = map.getZoom();
    if (go()) return;
  }

  // Bing
  map = window.map;
  if (map && map.get_center && map.get_zoomLevel) {
    latlon = map.get_center();
    lon = latlon.longitude;
    lat = latlon.latitude;
    zoom = map.get_zoomLevel();
    if (go()) return;
  }

  // Try to extract from links on page
  if (goBySelectedUrls('a[href*="map"],a[href*="lat="],a[href*="lon="]', 'href')) return;
  if (goBySelectedUrls('img[src*="map"],img[src*="tile"]', 'src')) return;
  goBySelectedUrls('a[href]', 'href');
})();