-
-def strip(context, text):
- """Remove unneeded whitespace from beginning and end"""
- if isinstance(text, list):
- text = ''.join(text)
- return re.sub(r'\s+', ' ', text).strip()
-
-
-def substitute_entities(context, text):
- """XPath extension function converting all entites in passed text."""
- if isinstance(text, list):
- text = ''.join(text)
- for entity, substitutution in ENTITY_SUBSTITUTIONS:
- text = text.replace(entity, substitutution)
- return text
-
-
-def wrap_words(context, text, wrapping):
- """XPath extension function automatically wrapping words in passed text"""
- if isinstance(text, list):
- text = ''.join(text)
- if not wrapping:
- return text
-
- words = re.split(r'\s', text)
-
- line_length = 0
- lines = [[]]
- for word in words:
- line_length += len(word) + 1
- if line_length > wrapping:
- # Max line length was exceeded. We create new line
- lines.append([])
- line_length = len(word)
- lines[-1].append(word)
- return '\n'.join(' '.join(line) for line in lines)
-
-
-# Register substitute_entities function with lxml
-ns = etree.FunctionNamespace('http://wolnelektury.pl/functions')
-ns['strip'] = strip
-ns['substitute_entities'] = substitute_entities
-ns['wrap_words'] = wrap_words
-
-