// ==UserScript==
// @name         Jasper's Google Reader subscribe
// @namespace    http://browservulsel.blogspot.com/
// @description  v0.3 - Another Google Reader subscriber. This one was designed to use as little screen size as possible. It only adds a feed icon in the top right corner. On mouse over the subscribe links are shown.
// ==/UserScript==

/*
  Author: Jasper de Vries, jepsar@gmail.com
  Date:   2006-04-13
  
  Change for version 0.3 by Mihai Parparita: Check if the user is already
  subscribed, and modify the appearance of the image accordingly.

*/

const SUBSCRIBED_IMAGE = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM%2FrhtAAAABGdBTUEAANbY1E9YMgAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAAQnSURBVHja7JhdbBRVFMf%2Fs1%2Fdpew2212gbVCwKaayRh%2BICdhVHqgmxpD4oC8mSkyMPvIoPBgj4Z3wYEyqIVrCRyAxRh7Q2IiabRSxEI1QpWF5aNntwiyz2%2B7M7Hx7ZnZWB9xv2unGcJK7s5m5H7%2F533PPuXMZwzDQzcY8BGwHhmESdBmjMkQlRWxTXQNIcK%2FRJeG4xRHbUV8XgIXoYsIN3%2Fcoav74ugDuDXtKa5qni%2BG4NQNsRTmy9JoAtghnWsr1MNMOnBliXAVsAy5DTBOuB2oCfKcVOCrHiUl0FZDg3qwR52qt2gknXF1AO%2BXscHQ6RfVS1efs56P9SiY3LbPFUaVcac%2FUGfWrNIM5PsCeuqweK%2FCa2ABuksbgmubiGimnamYH1tLPHo7MBoPGqDyyB1r%2FLvh9DHp9JRi3vkaPcgteD2MBT%2F4gIJ1TUS5IWBLBfpySP6rRr2grx9Ui97UIB1tNC1BeXB7dtHMj0kIII6%2B856hyCOWFFMRf3scX317BzduqdTcY9kMq8PE6cMfrwd0DSHDJBnBw%2BpAqUX1ZRVicxqUj49B0Az0DT2FLch%2F6tyRx5ru3cG2pRGr%2BAY%2BnMvm6VrPPswSXaeSYTgXHmjhx9J9%2FOgEqKmJMEbr0E8wJ7ctfwtLpCRzJPI9879MIbXsZy9d0rBeu0stTG6O%2ByzQyj62eufxDTeqG7FhGElIpq2DvSBg8wGPgQAl49Ud8Of8k2NkpFH%2BdhCqXEd6%2BF7InRvV166Ucdq4VOGeqC7YYMaJVBSFr8GkquNkLyM1dxtmp35GNvwRlYxJhNQd%2B7nurqvexF6CrmlNBE26m1RDV7nYragVTE1BSEPOTkKf34LOLBn7jH8Hm517HupHdEJaz8GUuQhyiqY5uhYQIARaq4WqmnQHb3SwMVhU0JB2SoOPTnw1wArDZmEdu%2BkTlrYd3I2B6wsKVSqvY49hBa9gZS1cLMFEFZEmQk5s%2BRH7XB2CeeRcemsIIvwA%2Bn0WgbxBimTovLVrVnxjeimc3dJaF2p5iWijj518EphfXwxureD4THoBAQCEvoKhl616JItwGRkcikcCYLkH468EAuTbaJL%2BZJ%2Bf3lxC4m0GgfwhaIYsec0EQrzBzBlpvFHFado96CkioN4A71%2BGFOwpaJhlgIzri6oVPwJJS8V4g4K3EuohOChazGFoHvD3AQzp%2FELxMzwL4s5OxLB9slGpq2ak0ji0pyCtKZVp5YuL4f4ufospYH3CTBW4XKSLpuB4INk0EjT%2Fcybf235MtOre6O5OOFezAD12BW2nAFYdbScBVgVspwFWDuz%2FMpDton7H3dKsC958tv5klzEDcYtu0DSe6ej7YZNtftRlqd27NDjAJ0vyi21unjanaVddOI%2Bp9FxNk1FZyvKqafSTBwUV7eEb9vwf8W4ABAClz84zUeuOSAAAAAElFTkSuQmCC";

var result = document.evaluate('//link[@rel="alternate"][contains(@type, "rss") or contains(@type, "atom") or contains(@type, "rdf")]', document, null, 0, null);
var item;
var feeds = [];
while (item = result.iterateNext()) feeds.push(item);

if (feeds.length > 0) {
  GM_addStyle('#JGRSmain { position: fixed; z-index: 32767; top: 0; right: 0; padding: 0 0 0 20px; min-height: 20px; background: 2px 2px url("chrome://browser/skin/page-livemarks.png") no-repeat; }');
  GM_addStyle("#JGRSmain.subscribed { background: url(" + SUBSCRIBED_IMAGE + "); min-height: 40px; padding: 0 0 0 40px;}");
  GM_addStyle("#JGRSmain.subscribed:hover { background: transparent;}");
  GM_addStyle('#JGRSmain:hover { padding: 0; }');
  GM_addStyle('#JGRSmain > div { display: none; }');
  GM_addStyle('#JGRSmain:hover > div { display: block; padding: 1px 0; background: #f8f8f8; -moz-border-radius: 0 0 0 10px; border: solid #ccc; border-width: 0 0 1px 1px; }');
  GM_addStyle('#JGRSmain a { display: block; margin: 4px 0; padding: 0 10px; font-family: "Verdana"; font-size: 11px; line-height: 14px; font-weight: normal; color: #669; text-decoration: underline; text-align: left; background: #f8f8f8; border: 0; }');
  GM_addStyle('#JGRSmain a:hover { color: #f66; }');

  var JGRSmain = document.createElement('div');
  JGRSmain.setAttribute('id', 'JGRSmain');
  document.body.appendChild(JGRSmain);

  var JGRSfeeds = document.createElement('div');
  JGRSmain.appendChild(JGRSfeeds);
  
  for (var i = 0, feed; feed = feeds[i]; i++) {
    var encodedFeedUrl = encodeURIComponent(feed.href);
    JGRSfeeds.innerHTML += '<a href=http://www.google.com/reader/view/feed/'+ encodedFeedUrl +'>'+ feed.title +'</a>';
    
    GM_xmlhttpRequest({
      method: "GET",
      url: "http://www.google.com/reader/api/0/subscribed?s=feed%2F" + encodedFeedUrl,
      onload: function(response) {
          if (response.responseText == "true") {
            isSubscribed = true;
            JGRSmain.className = "subscribed";        
          }
        }
    });
  }
}