From 67d22a15e9f1df70ab174caa5cd195eb9b2b9b8a Mon Sep 17 00:00:00 2001
From: ccd0 <admin@containerchan.org>
Date: Mon, 7 Nov 2016 12:19:54 -0800
Subject: [PATCH] Add `Prune by Default` option (default: false): Turn Reply
 Pruning on by default in all threads, except when navigating to a post that
 would be hidden. #1115

---
 src/Monitoring/ReplyPruning.coffee   |  8 +++-----
 src/Quotelinks/QuoteThreading.coffee | 10 ++++++----
 src/config/Config.coffee             |  5 +++++
 3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/Monitoring/ReplyPruning.coffee b/src/Monitoring/ReplyPruning.coffee
index 481efaf0b..1c419ba02 100644
--- a/src/Monitoring/ReplyPruning.coffee
+++ b/src/Monitoring/ReplyPruning.coffee
@@ -2,8 +2,6 @@ ReplyPruning =
   init: ->
     return unless g.VIEW is 'thread' and Conf['Reply Pruning']
 
-    @active = not (Conf['Quote Threading'] and Conf['Thread Quotes'])
-
     @container = $.frag()
 
     @summary = $.el 'span',
@@ -14,7 +12,7 @@ ReplyPruning =
       @inputs.enabled.checked = !@inputs.enabled.checked
       $.event 'change', null, @inputs.enabled
 
-    label = UI.checkbox 'Prune Replies', 'Show Last', @active
+    label = UI.checkbox 'Prune Replies', 'Show Last', Conf['Prune by Default']
     el = $.el 'span',
       title: 'Maximum number of replies to show.'
     ,
@@ -25,6 +23,7 @@ ReplyPruning =
       enabled: label.firstElementChild
       replies: el.lastElementChild
 
+    @setEnabled.call @inputs.enabled
     $.on @inputs.enabled, 'change', @setEnabled
     $.on @inputs.replies, 'change', $.cb.value
 
@@ -63,11 +62,10 @@ ReplyPruning =
         (ReplyPruning.totalFiles++ if post.file)
 
     # If we're linked to a post that we would hide, don't hide the posts in the first place.
-    # Also don't hide posts if we open the thread by a link to the OP.
     if (
       ReplyPruning.active and
       /^#p\d+$/.test(location.hash) and
-      0 <= @posts.keys.indexOf(location.hash[2..]) < 1 + Math.max(ReplyPruning.total - +Conf["Max Replies"], 0)
+      1 <= @posts.keys.indexOf(location.hash[2..]) < 1 + Math.max(ReplyPruning.total - +Conf["Max Replies"], 0)
     )
       ReplyPruning.active = ReplyPruning.inputs.enabled.checked = false
 
diff --git a/src/Quotelinks/QuoteThreading.coffee b/src/Quotelinks/QuoteThreading.coffee
index feb9ed80f..d032d7621 100644
--- a/src/Quotelinks/QuoteThreading.coffee
+++ b/src/Quotelinks/QuoteThreading.coffee
@@ -39,10 +39,12 @@ QuoteThreading =
   inserted: {}
 
   setEnabled: ->
-    other = ReplyPruning.inputs?.enabled
-    if @checked and other?.checked
-      other.checked = false
-      $.event 'change', null, other
+    if @checked
+      $.set 'Prune by Default', false
+      other = ReplyPruning.inputs?.enabled
+      if other?.checked
+        other.checked = false
+        $.event 'change', null, other
     $.cb.checked.call @
 
   setThread: ->
diff --git a/src/config/Config.coffee b/src/config/Config.coffee
index 080b4c294..69291e027 100644
--- a/src/config/Config.coffee
+++ b/src/config/Config.coffee
@@ -409,6 +409,11 @@ Config =
         true
         'Hide old replies in long threads. Number of replies shown can be set from header menu.'
       ]
+      'Prune by Default': [
+        false
+        'Turn Reply Pruning on by default in all threads, except when navigating to a post that would be hidden.'
+        1
+      ]
 
     'Posting and Captchas':
       'Quick Reply': [