From 92fbc73760721902ed206312973a6d86613fb5a5 Mon Sep 17 00:00:00 2001
From: Piotr Sarnacki <drogus@gmail.com>
Date: Fri, 20 Feb 2015 13:59:45 +0100
Subject: [PATCH] Show 'Top' button only if log has any content

---
 app/models/log.coffee      | 2 ++
 app/templates/jobs/pre.hbs | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/models/log.coffee b/app/models/log.coffee
index b72551a0..fd4c0471 100644
--- a/app/models/log.coffee
+++ b/app/models/log.coffee
@@ -41,6 +41,8 @@ Log = Ember.Object.extend
   isLoaded: false
   length: 0
 
+  hasContent: Ember.computed.gt('parts.length', 0)
+
   fetchMissingParts: (partNumbers, after) ->
     return if @get('notStarted')
 
diff --git a/app/templates/jobs/pre.hbs b/app/templates/jobs/pre.hbs
index c8793760..ff9e1293 100644
--- a/app/templates/jobs/pre.hbs
+++ b/app/templates/jobs/pre.hbs
@@ -12,7 +12,9 @@
   </a>
   <pre id="log" class="ansi"></pre>
 
-  <a href='#' class="to-top" {{action "toTop" target=view}}>Top</a>
+  {{#if view.log.hasContent}}
+    <a href='#' class="to-top" {{action "toTop" target=view}}>Top</a>
+  {{/if}}
 
   {{#if view.limited}}
     <p class="warning">