Move process_footnote_backlinks function to external file

1 files changed, 12 insertions, 0 deletions

diff --git a/utils/utils.py b/utils/utils.py
index 401e133e..f8cb8ef6 100644
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -165,3 +165,15 @@ def _pre_tag_insert_line_numbers(soup, pre_tag):
         # empty <span> tag warning
         ln_tag.append(soup.new_string("", bs4.Comment))
         pre_tag.code.append(ln_tag)
+
+
+def process_footnote_backlinks(soup):
+    """Add class attribute "footnotes-backlink" to each footnote backlink."""
+    for footnotes in soup.find_all("div", attrs={"class": "footnotes"}):
+        for fn_a_tag in footnotes.find_all(lambda tag:
+                                           tag.name == "a" and
+                                           tag.has_attr("href") and
+                                           tag["href"].startswith("#fnref") and
+                                           tag.string == "\u21A9"):  # U+21A9: LEFTWARDS ARROW WITH HOOK
+            fn_a_tag["class"] = "footnotes-backlink"
+            fn_a_tag.string = "\u21A9\uFE0E" # U+FE0E: VARIATION SELECTOR-15