From 87fe975ac69eb31a11019011a793024bc944dc47 Mon Sep 17 00:00:00 2001
From: ccd0 <admin@containerchan.org>
Date: Fri, 7 Dec 2018 12:59:26 -0800
Subject: [PATCH] Implement PostsRemoved event.

---
 src/Filtering/ThreadHiding.coffee     |  8 ++++++--
 src/General/Index.coffee              |  2 ++
 src/Miscellaneous/ExpandThread.coffee |  2 ++
 src/Quotelinks/QuoteInline.coffee     |  2 ++
 src/Quotelinks/QuotePreview.coffee    |  2 ++
 src/main/Main.coffee                  | 16 +++++++++++++---
 6 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/Filtering/ThreadHiding.coffee b/src/Filtering/ThreadHiding.coffee
index 625f93395..b5352fc80 100644
--- a/src/Filtering/ThreadHiding.coffee
+++ b/src/Filtering/ThreadHiding.coffee
@@ -183,7 +183,9 @@ ThreadHiding =
     threadRoot = thread.nodes.root
     thread.isHidden = true
     Index.updateHideLabel()
-    $.rm thread.catalogView.nodes.root if thread.catalogView and !Index.showHiddenThreads
+    if thread.catalogView and !Index.showHiddenThreads
+      $.rm thread.catalogView.nodes.root
+      $.event 'PostsRemoved', null, Index.root
 
     return threadRoot.hidden = true unless makeStub
 
@@ -196,4 +198,6 @@ ThreadHiding =
     threadRoot = thread.nodes.root
     threadRoot.hidden = thread.isHidden = false
     Index.updateHideLabel()
-    $.rm thread.catalogView.nodes.root if thread.catalogView and Index.showHiddenThreads
+    if thread.catalogView and Index.showHiddenThreads
+      $.rm thread.catalogView.nodes.root
+      $.event 'PostsRemoved', null, Index.root
diff --git a/src/General/Index.coffee b/src/General/Index.coffee
index 08418028d..5dd02a09f 100644
--- a/src/General/Index.coffee
+++ b/src/General/Index.coffee
@@ -869,6 +869,8 @@ Index =
     delete Index.pageNum
     $.rmAll Index.root
     $.rmAll Header.hover
+    if Index.loaded and Index.root.parentNode
+      $.event 'PostsRemoved', null, Index.root
     if Conf['Index Mode'] is 'catalog'
       Index.buildCatalog threadIDs
     else
diff --git a/src/Miscellaneous/ExpandThread.coffee b/src/Miscellaneous/ExpandThread.coffee
index bb689fc11..aff64b19b 100644
--- a/src/Miscellaneous/ExpandThread.coffee
+++ b/src/Miscellaneous/ExpandThread.coffee
@@ -84,6 +84,8 @@ ExpandThread =
       postsCount++
       filesCount++ if 'file' of Get.postFromRoot reply
       $.rm reply
+    if Index.enabled # otherwise handled by Main.addPosts
+      $.event 'PostsRemoved', null, a.parentNode
     a.textContent = Build.summaryText '+', postsCount, filesCount
     $.rm $('.summary-bottom', threadRoot)
 
diff --git a/src/Quotelinks/QuoteInline.coffee b/src/Quotelinks/QuoteInline.coffee
index ea80963eb..1cda988ad 100644
--- a/src/Quotelinks/QuoteInline.coffee
+++ b/src/Quotelinks/QuoteInline.coffee
@@ -87,7 +87,9 @@ QuoteInline =
     root = QuoteInline.findRoot quotelink, isBacklink
     root = $.x "following-sibling::div[@data-full-i-d='#{boardID}.#{postID}'][1]", root
     qroot = $.x 'ancestor::*[contains(@class,"postContainer")][1]', root
+    {parentNode} = root
     $.rm root
+    $.event 'PostsRemoved', null, parentNode
 
     unless $ '.inline', qroot
       $.rmClass qroot, 'hasInline'
diff --git a/src/Quotelinks/QuotePreview.coffee b/src/Quotelinks/QuotePreview.coffee
index ff63a9277..90fc43bf0 100644
--- a/src/Quotelinks/QuotePreview.coffee
+++ b/src/Quotelinks/QuotePreview.coffee
@@ -52,6 +52,8 @@ QuotePreview =
     # Stop if it only contains text.
     return if not (root = @el.firstElementChild)
 
+    $.event 'PostsRemoved', null, Header.hover
+
     clone = Get.postFromRoot root
     post  = clone.origin
     post.rmClone root.dataset.clone
diff --git a/src/main/Main.coffee b/src/main/Main.coffee
index 8ee5f176c..b9f3abc80 100644
--- a/src/main/Main.coffee
+++ b/src/main/Main.coffee
@@ -370,19 +370,29 @@ Main =
     return
 
   addPosts: (records) ->
-    threads = []
-    posts   = []
-    errors  = []
+    threads   = []
+    threadsRM = []
+    posts     = []
+    errors    = []
     for record in records
       thread = Get.threadFromRoot record.target
       n = posts.length
       Main.parsePosts record.addedNodes, thread, posts, errors
       if posts.length > n and thread not in threads
         threads.push thread
+      anyRemoved = false
+      for el in record.removedNodes
+        if Get.postFromRoot(el)?.nodes.root is el and !doc.contains(el)
+          anyRemoved = true
+          break
+      if anyRemoved and thread not in threadsRM
+        threadsRM.push thread
     Main.handleErrors errors if errors.length
     Main.callbackNodesDB 'Post', posts, ->
       for thread in threads
         $.event 'PostsInserted', null, thread.nodes.root
+      for thread in threadsRM
+        $.event 'PostsRemoved', null, thread.nodes.root
       return
 
   callbackNodes: (klass, nodes) ->