Add more favicons for browser shortcuts

src/pretix/presale/views/theme.py

@@ -0,0 +1,50 @@
+from django.http import HttpResponse
+from django.templatetags.static import static
+from django.views.decorators.cache import cache_page
+
+
+@cache_page(3600)
+def browserconfig_xml(request):
+    return HttpResponse(
+        """<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="{}"/>
+            <square310x310logo src="{}"/>
+            <TileColor>#3b1c4a</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>""".format(
+            static('pretixbase/img/icons/mstile-150x150.png'),
+            static('pretixbase/img/icons/mstile-310x310.png'),
+        ), content_type='text/xml'
+    )
+
+
+@cache_page(3600)
+def webmanifest(request):
+    return HttpResponse(
+        """{
+    "name": "",
+    "short_name": "",
+    "icons": [
+        {
+            "src": "%s",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "%s",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#3b1c4a",
+    "background_color": "#3b1c4a",
+    "display": "standalone"
+}""" % (
+            static('pretixbase/img/icons/android-chrome-192x192.png'),
+            static('pretixbase/img/icons/android-chrome-512x512.png'),
+        ), content_type='text/json'
+    )