Make the Unread Line optional.

4chan_x.user.js

@@ -92,6 +92,7 @@
         'Thread Updater': [true, 'Fetch and insert new replies. Has more options in its own dialog.'],
         'Unread Count': [true, 'Show the unread posts count in the tab title.'],
         'Unread Tab Icon': [true, 'Show a different favicon when there are unread posts.'],
+        'Unread Line': [true, 'Show a line to distinguish read posts from unread ones.'],
         'Thread Excerpt': [true, 'Show an excerpt of the thread in the tab title.'],
         'Thread Stats': [true, 'Display reply and image count.'],
         'Thread Watcher': [true, 'Bookmark threads.'],
@@ -5243,14 +5244,16 @@
         }
       }
       Unread.addPosts(posts);
-      if (Unread.hr.parentNode) {
+      if (Unread.posts.length) {
-        Unread.hr.scrollIntoView(false);
+        $.x('preceding-sibling::div[contains(@class,"postContainer")][1]', Unread.posts[0].nodes.root).scrollIntoView(false);
-      } else if (posts.length && !Unread.posts.length) {
+      } else if (posts.length) {
         posts[posts.length - 1].nodes.root.scrollIntoView();
       }
       $.on(d, 'ThreadUpdate', Unread.onUpdate);
       $.on(d, 'scroll visibilitychange', Unread.read);
-      return $.on(d, 'visibilitychange', Unread.setLine);
+      if (Conf['Unread Line']) {
+        return $.on(d, 'visibilitychange', Unread.setLine);
+      }
     },
     addPosts: function(newPosts) {
       var ID, post, youInThisThread, yourPosts, _i, _len, _ref;
@@ -5269,7 +5272,9 @@
           Unread.addPostQuotingYou(post, yourPosts);
         }
       }
-      Unread.setLine((_ref = Unread.posts[0], __indexOf.call(newPosts, _ref) >= 0));
+      if (Conf['Unread Line']) {
+        Unread.setLine((_ref = Unread.posts[0], __indexOf.call(newPosts, _ref) >= 0));
+      }
       Unread.read();
       return Unread.update();
     },

CHANGELOG.md

@@ -34,7 +34,7 @@ Thread Updater changes:
  - Added a setting to always auto-scroll to the bottom instead of the first new post.
 
 Unread posts changes:
- - Added a line to distinguish read post from unread ones.
+ - Added a line to distinguish read posts from unread ones.
  - Read posts won't be marked as unread after reloading a thread.
  - The page will scroll to the last read post after reloading a thread.
  - Visible posts will not be taken into account towards the unread count.

src/config.coffee

@@ -37,6 +37,7 @@ Config =
       'Thread Updater':               [true,  'Fetch and insert new replies. Has more options in its own dialog.']
       'Unread Count':                 [true,  'Show the unread posts count in the tab title.']
       'Unread Tab Icon':              [true,  'Show a different favicon when there are unread posts.']
+      'Unread Line':                  [true,  'Show a line to distinguish read posts from unread ones.']
       'Thread Excerpt':               [true,  'Show an excerpt of the thread in the tab title.']
       'Thread Stats':                 [true,  'Display reply and image count.']
       'Thread Watcher':               [true,  'Bookmark threads.']

src/features.coffee

@@ -3524,14 +3524,15 @@ Unread =
     for ID, post of @posts
       posts.push post if post.isReply
     Unread.addPosts posts
-    if Unread.hr.parentNode
+    if Unread.posts.length
-      Unread.hr.scrollIntoView false
+      # Scroll to before the first unread post.
-    else if posts.length and !Unread.posts.length
+      $.x('preceding-sibling::div[contains(@class,"postContainer")][1]', Unread.posts[0].nodes.root).scrollIntoView false
+    else if posts.length
       # Scroll to the last read post.
       posts[posts.length - 1].nodes.root.scrollIntoView()
     $.on d, 'ThreadUpdate',            Unread.onUpdate
     $.on d, 'scroll visibilitychange', Unread.read
-    $.on d, 'visibilitychange',        Unread.setLine
+    $.on d, 'visibilitychange',        Unread.setLine if Conf['Unread Line']
 
   addPosts: (newPosts) ->
     if Conf['Quick Reply']
@@ -3543,8 +3544,9 @@ Unread =
         continue
       Unread.posts.push post
       Unread.addPostQuotingYou post, yourPosts if yourPosts
-    # Force line on visible threads if there were no unread posts previously.
+    if Conf['Unread Line']
-    Unread.setLine Unread.posts[0] in newPosts
+      # Force line on visible threads if there were no unread posts previously.
+      Unread.setLine Unread.posts[0] in newPosts
     Unread.read()
     Unread.update()