src/librarian/elements/figures/ilustr.py

   1 import six.moves
   2 from PIL import Image
   3 from ..base import WLElement
   4
   5
   6 class Ilustr(WLElement):
   7     EPUB_TAG = HTML_TAG = 'img'
   8
   9     def get_html_attr(self, builder):
  10         ## TODO: thumbnail.
  11
  12         url = six.moves.urllib.parse.urljoin(
  13             builder.base_url,
  14             self.get('src')
  15         )
  16
  17         imgfile = six.moves.urllib.request.urlopen(url)
  18         img = Image.open(imgfile)
  19         th_format, ext, media_type = {
  20             'GIF': ('GIF', 'gif', 'image/gif'),
  21             'PNG': ('PNG', 'png', 'image/png'),
  22         }.get(img.format, ('JPEG', 'jpg', 'image/jpeg'))
  23
  24         width = 1200
  25         if img.size[0] < width:
  26             th = img
  27         else:
  28             th = img.resize((width, round(width * img.size[1] / img.size[0])))
  29
  30         buffer = six.BytesIO()
  31         th.save(buffer, format=th_format)
  32         imgfile.close()
  33         file_name = 'image%d.%s' % (
  34             builder.assign_image_number(),
  35             ext
  36         )
  37
  38         builder.add_file(
  39             content=buffer.getvalue(),
  40             file_name=file_name,
  41             media_type=media_type,
  42         )
  43
  44         return {
  45             'src': file_name,
  46             'alt': self.attrib['alt'],
  47             'title': self.attrib['alt'],
  48         }
  49
  50     get_epub_attr = get_html_attr