From 6c421110b57c695e9c0a0d9212bc271d701d17da Mon Sep 17 00:00:00 2001 From: ahmad-alkadri Date: Sat, 14 Jan 2023 23:00:08 +0000 Subject: [PATCH] Perso branch - added cjk check and enclosement --- searx/webutils.py | 66 +++++++++++++++++++++++++++++++++++------------ 1 file changed, 50 insertions(+), 16 deletions(-) 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