publichealth/home/models/__init__.py

@@ -2,3 +2,4 @@ from .forms import *
 from .models import *
 from .snippets import *
 from .admin import *
+from .image_formats import *

publichealth/home/models/image_formats.py

@@ -0,0 +1,17 @@
+# image_formats.py
+from django.utils.html import format_html
+from wagtail.images.formats import Format, register_image_format
+
+
+class OriginalImageFormat(Format):
+
+    def image_to_html(self, image, alt_text, extra_attributes=None):
+
+        default_html = super().image_to_html(image, alt_text, extra_attributes)
+
+        return format_html("{}<figcaption>{}</figcaption>", default_html, alt_text)
+
+
+register_image_format(
+    OriginalImageFormat('original_fullwidth', 'Original image', 'bodytext-image', 'original')
+)