Google Maps Walker

By Dan F — Last update Jan 30, 2008 — Installed 664 times. Daily Installs: 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 
// ==UserScript==
// @name           Google Maps Walker
// @namespace      dan@danfinnie.com
// @description    Tells you how long a route will take when walking/biking, etc.
// @include        http://maps.google.com*
// ==/UserScript==


//                                mode     spd <-- In units of (whatever is displayed on Google maps) per hour.  i.e. kph or mph.
var modes_of_transportation = [ ["walking", 4],
                                ["biking", 12] ];

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// Return true if the given index is the last element of the given array
function isLastElement(i, ary)
{
  return i == ary.length - 1;
}

var distance_div = YAHOO.util.Selector.query("td.timedist div div")[0];

if (true)
{
  var distance = parseFloat(
                             distance_div
                             .innerHTML
                             .match(/^\W*([0-9\,\.]+)/)[1]
                             .replace(",", "")
                           );

  // Add in our modes of transportation, construct tooltip
  var tooltip = ""
  for(var i = 0; i < modes_of_transportation.length; i++)
  {
    var verb = modes_of_transportation[i][0];
    var mph = modes_of_transportation[i][1];
    
    var minutes = distance / mph * 60;
    var hours = Math.round(minutes / 60);
    minutes = Math.round(minutes % 60);
    
    if (hours > 0)
      tooltip += hours.toString() + " hours and ";
    
    tooltip += minutes.toString() + " minutes " + verb;
    
    if (!isLastElement(i, modes_of_transportation))
      tooltip += ", ";
  }

  // Attach tooltip
  distance_div.setAttribute("title", tooltip);
}