Add direction tags to HTML e-mails for RTL languages (#6373)

app/helpers/application_helper.rb

@@ -22,10 +22,18 @@ module ApplicationHelper
   end
 
   def add_rtl_body_class(other_classes)
-    other_classes = "#{other_classes} rtl" if [:ar, :fa, :he].include?(I18n.locale)
+    other_classes = "#{other_classes} rtl" if locale_direction == 'rtl'
     other_classes
   end
 
+  def locale_direction
+    if [:ar, :fa, :he].include?(I18n.locale)
+      'rtl'
+    else
+      'ltr'
+    end
+  end
+
   def favicon_path
     env_suffix = Rails.env.production? ? '' : '-dev'
     "/favicon#{env_suffix}.ico"

app/mailers/application_mailer.rb

@@ -3,6 +3,7 @@
 class ApplicationMailer < ActionMailer::Base
   layout 'mailer'
 
+  helper :application
   helper :instance
   helper :mailer
 

app/mailers/user_mailer.rb

@@ -3,6 +3,7 @@
 class UserMailer < Devise::Mailer
   layout 'mailer'
 
+  helper :application
   helper :instance
 
   add_template_helper RoutingHelper

app/views/layouts/mailer.html.haml

@@ -7,7 +7,7 @@
     %title/
 
     = stylesheet_pack_tag 'mailer'
-  %body
+  %body{ dir: locale_direction }
     %table.email-table{ cellspacing: 0, cellpadding: 0 }
       %tbody
         %tr

app/views/notification_mailer/_status.html.haml

@@ -1,6 +1,6 @@
 - i ||= 0
 
-%table.email-table{ cellspacing: 0, cellpadding: 0 }
+%table.email-table{ cellspacing: 0, cellpadding: 0, dir: 'ltr' }
   %tbody
     %tr
       %td.email-body
@@ -24,6 +24,7 @@
                                       %bdi= display_name(status.account)
                                       = "@#{status.account.acct}"
 
+                              %div{ dir: rtl_status?(status) ? 'rtl' : 'ltr' }
                                 = Formatter.instance.format(status)
 
                               %p.status-footer