Merge branch 'master' of edugit.org:AlekSIS/official/AlekSIS

aleksis/core/templatetags/html_helpers.py

+from typing import Any
+
+from django import template
+
+from bs4 import BeautifulSoup
+
+register = template.Library()
+
+
+@register.filter
+def add_class_to_el(value: str, arg: str) -> str:
+    """Add a CSS class to every occurence of an element type.
+
+    Example: {{ mymodel.myhtmlfield|add_class_to_el:"ul,browser-default"
+    """
+
+    el, cls = value.split(",")
+    soup = BeautifulSoup(value, "html.parser")
+
+    for el in soup.find_all(el):
+        el["class"] = el.get("class", "") + f" {cls}"
+
+    return str(soup)