diff --git a/searx/webutils.py b/searx/webutils.py
index 35f4401d2..150b376fa 100644
--- a/searx/webutils.py
+++ b/searx/webutils.py
@@ -113,31 +113,65 @@ def prettify_url(url, max_length=74):
return url
+def contains_cjko(s: str) -> bool:
+ """This function check whether or not a string contains Chinese, Japanese,
+ or Korean characters. It employs regex and uses the u escape sequence to
+ match any character in a set of Unicode ranges.
+
+ Args:
+ s (str): string to be checked.
+
+ Returns:
+ bool: True if the input s contains the characters and False otherwise.
+ """
+ unicode_ranges = ('\u4e00-\u9fff' # Chinese characters
+ '\u3040-\u309f' # Japanese hiragana
+ '\u30a0-\u30ff' # Japanese katakana
+ '\u4e00-\u9faf' # Japanese kanji
+ '\uac00-\ud7af' # Korean hangul syllables
+ '\u1100-\u11ff' # Korean hangul jamo
+ )
+ return bool(re.search(fr'[{unicode_ranges}]', s))
+
+
+def regex_highlight_cjk(word: str) -> str:
+ """Generate the regex pattern to match for a given word according
+ to whether or not the word contains CJK characters or not.
+ If the word is and/or contains CJK character, the regex pattern
+ will match standalone word by taking into account the presence
+ of whitespace before and after it; if not, it will match any presence
+ of the word throughout the text, ignoring the whitespace.
+
+ Args:
+ word (str): the word to be matched with regex pattern.
+
+ Returns:
+ str: the regex pattern for the word.
+ """
+ rword = re.escape(word)
+ if contains_cjko(rword):
+ return fr'({rword})'
+ else:
+ return fr'\b({rword})(?!\w)'
+
+
def highlight_content(content, query):
if not content:
return None
+
# ignoring html contents
# TODO better html content detection
if content.find('<') != -1:
return content
- if content.lower().find(query.lower()) > -1:
- query_regex = '({0})'.format(re.escape(query))
- content = re.sub(query_regex, '\\1', content, flags=re.I | re.U)
- else:
- regex_parts = []
- for chunk in query.split():
- chunk = chunk.replace('"', '')
- if len(chunk) == 0:
- continue
- elif len(chunk) == 1:
- regex_parts.append('\\W+{0}\\W+'.format(re.escape(chunk)))
- else:
- regex_parts.append('{0}'.format(re.escape(chunk)))
- query_regex = '({0})'.format('|'.join(regex_parts))
- content = re.sub(query_regex, '\\1', content, flags=re.I | re.U)
-
+ querysplit = query.split()
+ queries = []
+ for qs in querysplit:
+ queries.extend(re.findall(regex_highlight_cjk(qs), content, flags=re.I | re.U))
+ if len(queries) > 0:
+ for q in set(queries):
+ content = re.sub(regex_highlight_cjk(q), f'{q}', content)
return content