mirror of
https://github.com/kovidgoyal/calibre.git
synced 2025-11-03 19:17:02 -05:00
100 lines
4.1 KiB
Python
100 lines
4.1 KiB
Python
#!/usr/bin/env python
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# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
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__license__ = 'GPL v3'
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__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
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__docformat__ = 'restructuredtext en'
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import os
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from calibre.ebooks.oeb.base import OPF
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from calibre.ebooks.oeb.polish.check.links import UnreferencedResource, check_links
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from calibre.ebooks.oeb.polish.container import OEB_DOCS, get_container
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from calibre.ebooks.oeb.polish.pretty import pretty_html_tree, pretty_opf
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from calibre.utils.imghdr import identify
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from sphinx.builders.epub3 import Epub3Builder as EpubBuilder
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from polyglot.builtins import iteritems
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class EPUBHelpBuilder(EpubBuilder):
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name = 'myepub'
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def build_epub(self, outdir=None, outname=None):
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if outdir:
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EpubBuilder.build_epub(self, outdir, outname)
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else:
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EpubBuilder.build_epub(self)
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outdir = self.outdir
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outname = self.config.epub_basename + '.epub'
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container = get_container(os.path.join(outdir, outname))
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self.fix_epub(container)
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container.commit()
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def fix_epub(self, container):
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' Fix all the brokenness that sphinx\'s epub builder creates '
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for name, mt in iteritems(container.mime_map):
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if mt in OEB_DOCS:
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self.workaround_ade_quirks(container, name)
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pretty_html_tree(container, container.parsed(name))
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container.dirty(name)
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self.fix_opf(container)
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def workaround_ade_quirks(self, container, name):
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root = container.parsed(name)
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# ADE blows up floating images if their sizes are not specified
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for img in root.xpath('//*[local-name() = "img" and (@class = "float-right-img" or @class = "float-left-img")]'):
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if 'style' not in img.attrib:
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imgname = container.href_to_name(img.get('src'), name)
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fmt, width, height = identify(container.raw_data(imgname))
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if width == -1:
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raise ValueError('Failed to read size of: %s' % imgname)
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img.set('style', 'width: %dpx; height: %dpx' % (width, height))
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def fix_opf(self, container):
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spine_names = {n for n, l in container.spine_names}
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spine = container.opf_xpath('//opf:spine')[0]
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rmap = {v:k for k, v in iteritems(container.manifest_id_map)}
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# Add unreferenced text files to the spine
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for name, mt in iteritems(container.mime_map):
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if mt in OEB_DOCS and name not in spine_names:
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spine_names.add(name)
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container.insert_into_xml(spine, spine.makeelement(OPF('itemref'), idref=rmap[name]))
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# Remove duplicate entries from spine
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seen = set()
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for item, name, linear in container.spine_iter:
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if name in seen:
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container.remove_from_xml(item)
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seen.add(name)
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# Remove the <guide> which is not needed in EPUB 3
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for guide in container.opf_xpath('//*[local-name()="guide"]'):
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guide.getparent().remove(guide)
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# Ensure that the cover-image property is set
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cover_id = rmap['_static/' + self.config.epub_cover[0]]
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for item in container.opf_xpath('//opf:item[@id="{}"]'.format(cover_id)):
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item.set('properties', 'cover-image')
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for item in container.opf_xpath('//opf:item[@href="epub-cover.xhtml"]'):
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item.set('properties', 'svg calibre:title-page')
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for item in container.opf_xpath('//opf:package'):
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prefix = item.get('prefix') or ''
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if prefix:
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prefix += ' '
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item.set('prefix', prefix + 'calibre: https://calibre-ebook.com')
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# Remove any <meta cover> tag as it is not needed in epub 3
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for meta in container.opf_xpath('//opf:meta[@name="cover"]'):
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meta.getparent().remove(meta)
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# Remove unreferenced files
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for error in check_links(container):
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if error.__class__ is UnreferencedResource:
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container.remove_item(error.name)
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# Pretty print the OPF
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pretty_opf(container.parsed(container.opf_name))
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container.dirty(container.opf_name)
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