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Viewer: If the book has no ToC try to generate one from headings, if any. Fixes #1847277 [Book viewer don't display content of fb2](https://bugs.launchpad.net/calibre/+bug/1847277)

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Kovid Goyal 2019-10-09 20:20:18 +05:30
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commit 4a3df07974
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src/calibre/srv/render_book.py
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@ -27,7 +27,7 @@ from calibre.ebooks.oeb.iterator.book import extract_book
from calibre.ebooks.oeb.polish.container import Container as ContainerBase from calibre.ebooks.oeb.polish.container import Container as ContainerBase
from calibre.ebooks.oeb.polish.cover import find_cover_image, set_epub_cover from calibre.ebooks.oeb.polish.cover import find_cover_image, set_epub_cover
from calibre.ebooks.oeb.polish.css import transform_css from calibre.ebooks.oeb.polish.css import transform_css
from calibre.ebooks.oeb.polish.toc import get_landmarks, get_toc from calibre.ebooks.oeb.polish.toc import from_xpaths, get_landmarks, get_toc
from calibre.ebooks.oeb.polish.utils import extract, guess_type from calibre.ebooks.oeb.polish.utils import extract, guess_type
from calibre.srv.metadata import encode_datetime from calibre.srv.metadata import encode_datetime
from calibre.utils.date import EPOCH from calibre.utils.date import EPOCH
@ -220,7 +220,10 @@ class Container(ContainerBase):
name == self.opf_name or mt == guess_type('a.ncx') or name.startswith('META-INF/') or name == self.opf_name or mt == guess_type('a.ncx') or name.startswith('META-INF/') or
name == 'mimetype' or not self.has_name_and_is_not_empty(name)} name == 'mimetype' or not self.has_name_and_is_not_empty(name)}
raster_cover_name, titlepage_name = self.create_cover_page(input_fmt.lower()) raster_cover_name, titlepage_name = self.create_cover_page(input_fmt.lower())
toc = get_toc(self).to_dict(count()) toc = get_toc(self).to_dict(count())
if not toc or not toc.get('children'):
toc = from_xpaths(self, ['//h:h1', '//h:h2', '//h:h3']).to_dict(count())
spine = [name for name, is_linear in self.spine_names] spine = [name for name, is_linear in self.spine_names]
spineq = frozenset(spine) spineq = frozenset(spine)
landmarks = [l for l in get_landmarks(self) if l['dest'] in spineq] landmarks = [l for l in get_landmarks(self) if l['dest'] in spineq]