librarian/mobi.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
   4 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   5 #
   6 from copy import deepcopy
   7 import os
   8 import subprocess
   9 from tempfile import NamedTemporaryFile
  10
  11 from librarian import IOFile
  12 from librarian import get_resource
  13
  14
  15 def transform(wldoc, verbose=False,
  16               sample=None, cover=None, flags=None):
  17     """ produces a MOBI file
  18
  19     wldoc: a WLDocument
  20     sample=n: generate sample e-book (with at least n paragraphs)
  21     cover: a cover.Cover factory overriding default
  22     flags: less-advertising,
  23     """
  24
  25     document = deepcopy(wldoc)
  26     del wldoc
  27     book_info = document.book_info
  28
  29     # provide a cover by default
  30     # if not cover:
  31     #     cover = WLCover
  32     cover_file = NamedTemporaryFile(suffix='.png', delete=False)
  33     bound_cover = cover(book_info)
  34     bound_cover.save(cover_file)
  35
  36     if bound_cover.uses_dc_cover:
  37         if document.book_info.cover_by:
  38             document.edoc.getroot().set('data-cover-by', document.book_info.cover_by)
  39         if document.book_info.cover_source:
  40             document.edoc.getroot().set('data-cover-source', document.book_info.cover_source)
  41
  42     if not flags:
  43         flags = []
  44     flags = list(flags) + ['without-fonts']
  45     epub = document.as_epub(
  46         verbose=verbose, sample=sample, html_toc=True, flags=flags, style=get_resource('mobi/style.css'))
  47
  48     if verbose:
  49         kwargs = {}
  50     else:
  51         devnull = open("/dev/null", 'w')
  52         kwargs = {"stdout": devnull, "stderr": devnull}
  53
  54     output_file = NamedTemporaryFile(prefix='librarian', suffix='.mobi', delete=False)
  55     output_file.close()
  56     subprocess.check_call(
  57         ['ebook-convert', epub.get_filename(), output_file.name, '--no-inline-toc', '--cover=%s' % cover_file.name],
  58         **kwargs)
  59     os.unlink(cover_file.name)
  60     return IOFile.from_filename(output_file.name)