add aria-hidden if no subevents

src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar.html

@@ -52,7 +52,7 @@
     </ul>
 </nav>
 <div class="calendar-container">
-    {% include "pretixpresale/fragment_calendar.html" with show_avail=event.settings.event_list_availability weeks=subevent_list.weeks show_names=subevent_list.show_names %}
+    {% include "pretixpresale/fragment_calendar.html" with show_avail=event.settings.event_list_availability weeks=subevent_list.weeks show_names=subevent_list.show_names any_events=subevent_list.any_events %}
     {% if subevent_list.any_events is False %}
         <div class="calendar-empty">
             <span class="fa fa-calendar-times-o fa-4x text-muted"></span>

src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar_week.html

@@ -61,7 +61,7 @@
     </ul>
 </nav>
 <div class="calendar-container">
-    {% include "pretixpresale/fragment_week_calendar.html" with show_avail=event.settings.event_list_availability days=subevent_list.days show_names=subevent_list.show_names %}
+    {% include "pretixpresale/fragment_week_calendar.html" with show_avail=event.settings.event_list_availability days=subevent_list.days show_names=subevent_list.show_names any_events=subevent_list.any_events %}
     {% if subevent_list.any_events is False %}
         <div class="calendar-empty">
             <span class="fa fa-calendar-times-o fa-4x text-muted"></span>

src/pretix/presale/templates/pretixpresale/fragment_calendar.html

@@ -3,7 +3,7 @@
 {% load date_fast %}
 {% load calendarhead %}
 <div class="table-responsive">
-    <table class="table table-calendar" role="grid">
+    <table class="table table-calendar" role="grid"{% if any_events is False %} aria-hidden="true"{% endif %}>
         <caption class="sr-only">{% trans "Calendar" %}</caption>
         <thead>
         <tr>

src/pretix/presale/templates/pretixpresale/fragment_week_calendar.html

@@ -1,7 +1,7 @@
 {% load html_time %}
 {% load i18n %}
 {% load date_fast %}
-<div class="week-calendar">
+<div class="week-calendar"{% if any_events is False %} aria-hidden="true"{% endif %}>
     {% for day in days %}
         <details class="weekday {% if day.events %}has-events{% else %}no-events{% endif %} {% if day.today %}today{% endif %}"
                 data-date="{{ day.date|date_fast:"SHORT_DATE_FORMAT" }}" open>