Introduce a word-wrapping filter that checks if there are lines (containing spaces to not

count URLs) longer than 100 characters, and only wraps the text if that's the case, to 
prevent messing up pre-wrapped text. Use this filter in the review email code.

Branch ready for merge.
 - Legacy-Id: 13495

Author: OleLaursen

ietf/doc/templatetags/ietf_filters.py

@@ -17,6 +17,7 @@
 from django.template.defaultfilters import truncatewords_html, linebreaksbr, stringfilter, striptags, urlize
 from django.utils.safestring import mark_safe, SafeData
 from django.utils.html import strip_tags
+from django.utils.text import wrap
 
 register = template.Library()
 
@@ -313,6 +314,19 @@ def wrap_text(text, width=72):
         prev_indent = indent
     return "\n".join(filled)
 
+@register.filter
+def wrap_text_if_unwrapped(text, width=72, max_tolerated_line_length=100):
+    text = re.sub(" *\r\n", "\n", text) # get rid of DOS line endings
+    text = re.sub(" *\r", "\n", text)   # get rid of MAC line endings
+
+    contains_long_lines = any(" " in l and len(l) > max_tolerated_line_length
+                              for l in text.split("\n"))
+
+    if contains_long_lines:
+        return wrap(text, width)
+    else:
+        return text
+
 @register.filter(name="compress_empty_lines")
 def compress_empty_lines(text):
     text = re.sub("( *\n){3,}", "\n\n", text)

ietf/doc/tests_review.py

@@ -660,7 +660,7 @@ def test_partially_complete_review(self):
             "state": ReviewRequestStateName.objects.get(slug="part-completed").pk,
             "reviewed_rev": review_req.doc.rev,
             "review_submission": "enter",
-            "review_content": "This is a review\nwith two lines",
+            "review_content": "This is a review with a somewhat long line spanning over 80 characters to test word wrapping\nand another line",
         })
         self.assertEqual(r.status_code, 302)
 
@@ -694,7 +694,7 @@ def test_partially_complete_review(self):
             "state": ReviewRequestStateName.objects.get(slug="completed").pk,
             "reviewed_rev": review_req.doc.rev,
             "review_submission": "enter",
-            "review_content": "This is another review\nwith\nthree lines",
+            "review_content": "This is another review with a really, really, really, really, really, really, really, really, really, really long line",
         })
         self.assertEqual(r.status_code, 302)
 

ietf/templates/review/completed_review.txt

@@ -1,4 +1,4 @@
-{% autoescape off %}{% filter wordwrap:70 %}{% if review_req.state_id == "part-completed" %}Review is partially done. Another review request has been registered for completing it.
+{% autoescape off %}{% load ietf_filters %}{% filter wrap_text_if_unwrapped:80 %}{% if review_req.state_id == "part-completed" %}Review is partially done. Another review request has been registered for completing it.
 
 {% endif %}Reviewer: {{ review_req.reviewer.person }}
 Review result: {{ review_req.result.name }}