mygpo/web/templatetags/mygpoutil.py

   1
   2 from django import template
   3 from django.utils.safestring import mark_safe
   4
   5 import re
   6 from htmlentitydefs import entitydefs
   7
   8 register = template.Library()
   9
  10 @register.filter
  11 def remove_html_tags(html):
  12     # If we would want more speed, we could make these global
  13     re_strip_tags = re.compile('<[^>]*>')
  14     re_unicode_entities = re.compile('&#(\d{2,4});')
  15     re_html_entities = re.compile('&(.{2,8});')
  16     re_newline_tags = re.compile('(<br[^>]*>|<[/]?ul[^>]*>|</li>)', re.I)
  17     re_listing_tags = re.compile('<li[^>]*>', re.I)
  18
  19     result = html
  20
  21     # Convert common HTML elements to their text equivalent
  22     result = re_newline_tags.sub('\n', result)
  23     result = re_listing_tags.sub('\n * ', result)
  24     result = re.sub('<[Pp]>', '\n\n', result)
  25
  26     # Remove all HTML/XML tags from the string
  27     result = re_strip_tags.sub('', result)
  28
  29     # Convert numeric XML entities to their unicode character
  30     result = re_unicode_entities.sub(lambda x: unichr(int(x.group(1))), result)
  31
  32     # Convert named HTML entities to their unicode character
  33     result = re_html_entities.sub(lambda x: unicode(entitydefs.get(x.group(1),''), 'iso-8859-1'), result)
  34
  35     # Convert more than two newlines to two newlines
  36     result = re.sub('([\r\n]{2})([\r\n])+', '\\1', result)
  37
  38     return mark_safe(result.strip())
  39