Added a modified slugify function and template filter, which converts slashes to dashes instead of eliding them. This is necessary in order to be able to distinguish the slugified room names like 'Schinkel I/II' from 'Schinkel III'.

 - Legacy-Id: 11589

Author: levkowetz

ietf/utils/templatetags/textfilters.py

@@ -0,0 +1,18 @@
+from __future__ import unicode_literals
+
+from django.template.base import Library
+from django.template.defaultfilters import stringfilter
+
+from ietf.utils.text import xslugify as _xslugify
+
+register = Library()
+
+@register.filter(is_safe=True)
+@stringfilter
+def xslugify(value):
+    """
+    Converts to ASCII. Converts spaces to hyphens. Removes characters that
+    aren't alphanumerics, underscores, slashes, or hyphens. Converts to
+    lowercase.  Also strips leading and trailing whitespace.
+    """
+    return _xslugify(value)

ietf/utils/text.py

@@ -0,0 +1,20 @@
+from __future__ import unicode_literals
+
+import re
+import unicodedata
+
+from django.utils.functional import allow_lazy
+from django.utils import six
+from django.utils.safestring import mark_safe
+
+def xslugify(value):
+    """
+    Converts to ASCII. Converts spaces to hyphens. Removes characters that
+    aren't alphanumerics, underscores, slash, or hyphens. Converts to
+    lowercase.  Also strips leading and trailing whitespace.
+    (I.e., does the same as slugify, but also converts slashes to dashes.)
+    """
+    value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')
+    value = re.sub('[^\w\s/-]', '', value).strip().lower()
+    return mark_safe(re.sub('[-\s/]+', '-', value))
+xslugify = allow_lazy(xslugify, six.text_type)