add theme

themes/butterfly/layout/includes/third-party/share/addtoany.pug

@@ -0,0 +1,10 @@
+.addtoany
+  .a2a_kit.a2a_kit_size_32.a2a_default_style
+    - let addtoanyItem = theme.share.addtoany.item.split(',')
+    each name in addtoanyItem
+      a(class="a2a_button_" + name)
+
+    a.a2a_dd(href="https://www.addtoany.com/share")
+script(async src='https://static.addtoany.com/menu/page.js')
+
+

themes/butterfly/layout/includes/third-party/share/index.pug

@@ -0,0 +1,9 @@
+- const { use } = theme.share
+
+if use
+  .post-share
+    case use
+      when 'addtoany'
+        !=partial('includes/third-party/share/addtoany', {}, {cache: true})
+      when 'sharejs'
+        include ./share-js.pug

themes/butterfly/layout/includes/third-party/share/share-js.pug

@@ -0,0 +1,4 @@
+- const coverVal = page.cover_type === 'img' ? page.cover : theme.avatar.img
+.social-share(data-image=url_for(coverVal) data-sites= theme.share.sharejs.sites)
+link(rel='stylesheet' href=url_for(theme.asset.sharejs_css) media="print" onload="this.media='all'")
+script(src=url_for(theme.asset.sharejs) defer)