Update footer.swig

1. Fix by comments some blocks.
2. Target blank in external links.
3. Separate `powered`, `theme` and `custom` options & refactor some formatting.

layout/_partials/footer.swig

@@ -1,7 +1,7 @@
-<div class="copyright" >
-  {% set current = date(Date.now(), "YYYY") %}
-  &copy; {% if theme.footer.since and theme.footer.since != current %} {{ theme.footer.since }} &mdash; {% endif %}
-  <span itemprop="copyrightYear">{{ current }}</span>
+<div class="copyright">{#
+#}{% set current = date(Date.now(), "YYYY") %}{#
+#}&copy; {% if theme.footer.since and theme.footer.since != current %}{{ theme.footer.since }} &mdash; {% endif %}{#
+#}<span itemprop="copyrightYear">{{ current }}</span>
   <span class="with-love">
     <i class="fa fa-{{ theme.footer.icon }}"></i>
   </span>
@@ -15,31 +15,33 @@
     {% if theme.post_wordcount.item_text %}
       <span class="post-meta-item-text">{{ __('post.totalcount') }}&#58;</span>
     {% endif %}
-    <span title="{{ __('post.totalcount') }}">
-      {{ totalcount(site, '0,0.0a') }}
-    </span>
+    <span title="{{ __('post.totalcount') }}">{#
+    #}{{ totalcount(site, '0,0.0a') }}{#
+  #}</span>
   {% endif %}
 </div>
 
 {% if theme.footer.powered %}
   <div class="powered-by">{#
-  #}{{ __('footer.powered', '<a class="theme-link" href="https://hexo.io">Hexo</a>') }}{#
+  #}{{ __('footer.powered', '<a class="theme-link" target="_blank" href="https://hexo.io">Hexo</a>') }}{#
 #}</div>
+{% endif %}
 
-  {% if theme.footer.theme %}
-    <span class="post-meta-divider">|</span>
-    <div class="theme-info">{#
-    #}{{ __('footer.theme') }} &mdash; {#
-    #}<a class="theme-link" href="https://github.com/iissnan/hexo-theme-next">{#
-      #}NexT.{{ theme.scheme }}{#
-    #}</a>{% if theme.footer.version %} v{{ theme.version }}{% endif %}{#
-  #}</div>
-  {% endif %}
+{% if theme.footer.powered and theme.footer.theme.enable %}
+  <span class="post-meta-divider">|</span>
+{% endif %}
 
-  {% if theme.footer.custom_text %}
-    <span class="post-meta-divider">|</span>
-    <div class="powered-by">{#
-    #}{{ theme.footer.custom_text }}{#
-  #}</div>
-  {% endif %}
+{% if theme.footer.theme.enable %}
+  <div class="theme-info">{#
+  #}{{ __('footer.theme') }} &mdash; {#
+  #}<a class="theme-link" target="_blank" href="https://github.com/iissnan/hexo-theme-next">{#
+    #}NexT.{{ theme.scheme }}{#
+  #}</a>{% if theme.footer.theme.version %} v{{ theme.version }}{% endif %}{#
+#}</div>
+{% endif %}
+
+{% if theme.footer.custom_text %}
+  <div class="footer-custom">{#
+  #}{{ theme.footer.custom_text }}{#
+#}</div>
 {% endif %}