Refactor page number code; fix off-by-one error and page number on archived threads

src/General/Build.coffee

@@ -151,12 +151,6 @@ Build =
     else
       "/#{boardID}/thread/#{threadID}\#q#{postID}"
 
-    pageIcon = if isOP and g.VIEW is 'index' and Conf['JSON Navigation']
-      pageNum   = Math.floor(Index.liveThreadIDs.indexOf(postID) / Index.threadsNumPerPage) + 1
-      <%= html(' <span class="page-num" title="This thread is on page ${pageNum} in the original index.">[${pageNum}]</span>') %>
-    else
-      <%= html('') %>
-
     sticky = if isSticky
       <%= html(' <img src="//s.4cdn.org/image/sticky${retina}.gif" alt="Sticky" title="Sticky" class="stickyIcon retina">') %>
     else
@@ -181,7 +175,7 @@ Build =
         '<span class="postNum${desktop2}">' +
           '<a href="${postLink}" title="Link to this post">No.</a>' +
           '<a href="${quoteLink}" title="Reply to this post">${postID}</a>' +
-          '&{pageIcon}&{sticky}&{closed}&{replyLink}' +
+          '&{sticky}&{closed}&{replyLink}' +
         '</span>' +
       '</div>'
     ) %>

src/General/Index.coffee

@@ -317,7 +317,6 @@ Index =
       try
         threadRoot = Build.thread g.BOARD, threadData
         if thread = g.BOARD.threads[threadData.no]
-          thread.setPage Math.floor i / Index.threadsNumPerPage
           thread.setStatus 'Sticky', !!threadData.sticky
           thread.setStatus 'Closed', !!threadData.closed
         else
@@ -326,6 +325,7 @@ Index =
         Index.nodes.push threadRoot
         continue if thread.ID of thread.posts
         posts.push new Post $('.opContainer', threadRoot), thread, g.BOARD
+        thread.setPage i // Index.threadsNumPerPage + 1
       catch err
         # Skip posts that we failed to parse.
         errors = [] unless errors

src/General/lib/thread.class

@@ -13,10 +13,12 @@ class Thread
     g.threads.push @fullID, board.threads.push @, @
 
   setPage: (pageNum) ->
-    icon = $ '.page-num', @OP.nodes.post
-    for key in ['title', 'textContent']
-      icon[key] = icon[key].replace /\d+/, pageNum
-    return
+    {info} = @OP.nodes
+    unless icon = $ '.page-num', info
+      icon = $.el 'span', className: 'page-num'
+      $.after $('a[title="Reply to this post"]', info), [$.tn(' '), icon]
+    icon.title       = "This thread is on page #{pageNum} in the original index."
+    icon.textContent = "[#{pageNum}]"
   setStatus: (type, status) ->
     name = "is#{type}"
     return if @[name] is status