Flickr disable/enable photo notes

By alto maltés — Last update Dec 30, 2007 — Installed 5,092 times. Daily Installs: 3, 4, 2, 3, 0, 4, 1, 2, 1, 3, 0, 1, 0, 3, 2, 1, 4, 5, 4, 0, 4, 2, 3, 0, 0, 1, 2, 1, 0, 0, 0, 0 
// ==UserScript==
// @namespace     tag:edward.grech.name,2007:/dev/greasemonkey
// @name          Flickr disable/enable photo notes
// @description   Disables notes on a Flickr photo page, and strikes out the “This photo has notes…” message. Clicking on that message then re-enables/disables notes.
// @author        Edward Grech | edward@grech.name | alto maltés | http://flickr.com/people/dwardu
// @date          2007-12-30
// @version       0.1
// @include       http://flickr.com/photos/*/*
// @include       http://*.flickr.com/photos/*/*
// ==/UserScript==

// More info at http://flickr.com/groups/flickrhacks/discuss/72157603565687671/

//  Date        Version   Comments
//  2007-12-30  0.1       If a page has notes but for some reason has no span[@id='noteCount'], it gets created and inserted before div[@id='DiscussPhoto']
//  2007-12-28  0.0       Original version

(function() {

  if(!unsafeWindow.page_p)
    return;

  var notes = unsafeWindow.page_p.notesA || [];
  
  if(notes.length == 0)
    return;
    
  var note_count_span = document.evaluate("//span[@id='noteCount']", document, null, XPathResult.ANY_UNORDERED_NODE_TYPE, null).singleNodeValue; // "This photo has notes. Move your mouse over the photo to see them."
  
  if(!note_count_span) { // If for some reason this photo has notes, but there is no span[@id='noteCount'], create it and insert it before div[@id='DiscussPhoto']
    note_count_span = document.createElement('span');
    note_count_span.setAttribute('id', 'noteCount');
    note_count_span.appendChild(document.createTextNode('This photo has notes. Move your mouse over the photo to see them.'));
    var discuss_photo_div = document.evaluate("//div[@id='DiscussPhoto']", document, null, XPathResult.ANY_UNORDERED_NODE_TYPE, null).singleNodeValue;
    discuss_photo_div.parentNode.insertBefore(note_count_span, discuss_photo_div);
  }

  var photo_notes_div = document.evaluate("//div[@id='photo_notes']", document, null, XPathResult.ANY_UNORDERED_NODE_TYPE, null).singleNodeValue;
  
  function apply_setting(enabled) {
    photo_notes_div.setAttribute('style', 'display: '+(enabled ? 'block' : 'none'));
    note_count_span.setAttribute('style', 'text-decoration: '+(enabled ? 'none' : 'line-through')); 
  }
  
  function current_setting() {
    return GM_getValue('notes_enabled', false);
  }

  function toggle_setting(e) {
    var enabled = !current_setting();
    GM_setValue('notes_enabled', enabled);
    apply_setting(enabled);
    alert(enabled ? 'Notes enabled.' : 'Notes disabled.');
  }

  note_count_span.addEventListener('click', toggle_setting, false);
  note_count_span.addEventListener('mouseover', function(e) { apply_setting(!current_setting()); }, false);
  note_count_span.addEventListener('mouseout',  function(e) { apply_setting( current_setting()); }, false);

  apply_setting(current_setting());

})();