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         imgfile.close()
  31         buffer = six.BytesIO()
  32         th.save(buffer, format=th_format)
  33         ## TODO: Counter
  34         file_name = 'image%d.%s' % (
  35             builder.assign_image_number(),
  36             ext
  37         )
  38
  39         builder.add_file(
  40             content=buffer.getvalue(),
  41             file_name=file_name,
  42             media_type=media_type,
  43         )
  44
  45         return {
  46             'src': file_name,
  47             'alt': self.attrib['alt'],
  48             'title': self.attrib['alt'],
  49         }
  50
  51     get_epub_attr = get_html_attr