The Thread Updater now updates the sticky/closed icons.

It will also open notifications when these change. Close #934.

4chan_x.user.js

@@ -5316,9 +5316,37 @@
         }
       });
     },
+    updateThreadStatus: function(title, OP) {
+      var icon, message, root, titleLC;
+      titleLC = title.toLowerCase();
+      if (ThreadUpdater.thread["is" + title] === !!OP[titleLC]) {
+        return;
+      }
+      if (!(ThreadUpdater.thread["is" + title] = !!OP[titleLC])) {
+        message = title === 'Sticky' ? 'The thread is not a sticky anymore.' : 'The thread is not closed anymore.';
+        new Notification('info', message, 30);
+        $.rm($("." + titleLC + "Icon", ThreadUpdater.thread.OP.nodes.info));
+        return;
+      }
+      message = title === 'Sticky' ? 'The thread is now a sticky.' : 'The thread is now closed.';
+      new Notification('info', message, 30);
+      icon = $.el('img', {
+        src: "//static.4chan.org/image/" + titleLC + ".gif",
+        alt: title,
+        title: title,
+        className: "" + titleLC + "Icon"
+      });
+      root = $('[title="Quote this post"]', ThreadUpdater.thread.OP.nodes.info);
+      if (title === 'Closed') {
+        root = $('.stickyIcon', ThreadUpdater.thread.OP.nodes.info) || root;
+      }
+      return $.after(root, [$.tn(' '), icon]);
+    },
     parse: function(postObjects) {
       var ID, count, deletedFiles, deletedPosts, files, index, node, nodes, num, post, postObject, posts, scroll, _i, _len, _ref;
       Build.spoilerRange[ThreadUpdater.thread.board] = postObjects[0].custom_spoiler;
+      ThreadUpdater.updateThreadStatus('Sticky', postObjects[0]);
+      ThreadUpdater.updateThreadStatus('Closed', postObjects[0]);
       nodes = [];
       posts = [];
       index = [];

changelog

@@ -20,6 +20,7 @@ beta
     There is now a setting to allow expanding spoilers.
 
   Thread Updater changes:
+    The Thread Updater will now notify of sticky/closed status change and update the icons.
     The Thread Updater will pause when offline, and resume when online.
     Added an option to always auto-scroll to the bottom.
 

src/features.coffee

@@ -3599,9 +3599,38 @@ ThreadUpdater =
     ThreadUpdater.req = $.ajax url, onloadend: ThreadUpdater.cb.load,
       headers: 'If-Modified-Since': ThreadUpdater.lastModified
 
+  updateThreadStatus: (title, OP) ->
+    titleLC = title.toLowerCase()
+    return if ThreadUpdater.thread["is#{title}"] is !!OP[titleLC]
+    unless ThreadUpdater.thread["is#{title}"] = !!OP[titleLC]
+      message = if title is 'Sticky'
+        'The thread is not a sticky anymore.'
+      else
+        'The thread is not closed anymore.'
+      new Notification 'info', message, 30
+      $.rm $ ".#{titleLC}Icon", ThreadUpdater.thread.OP.nodes.info
+      return
+    message = if title is 'Sticky'
+      'The thread is now a sticky.'
+    else
+      'The thread is now closed.'
+    new Notification 'info', message, 30
+    icon = $.el 'img',
+      src: "//static.4chan.org/image/#{titleLC}.gif"
+      alt: title
+      title: title
+      className: "#{titleLC}Icon"
+    root = $ '[title="Quote this post"]', ThreadUpdater.thread.OP.nodes.info
+    if title is 'Closed'
+      root = $('.stickyIcon', ThreadUpdater.thread.OP.nodes.info) or root
+    $.after root, [$.tn(' '), icon]
+
   parse: (postObjects) ->
     Build.spoilerRange[ThreadUpdater.thread.board] = postObjects[0].custom_spoiler
 
+    ThreadUpdater.updateThreadStatus 'Sticky', postObjects[0]
+    ThreadUpdater.updateThreadStatus 'Closed', postObjects[0]
+
     nodes = [] # post container elements
     posts = [] # post objects
     index = [] # existing posts