Current File : //usr/lib/calibre/calibre/ebooks/metadata/opf.py
#!/usr/bin/env python3
# License: GPLv3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
from lxml import etree
from calibre.ebooks.metadata.opf2 import OPF, pretty_print
from calibre.ebooks.metadata.opf3 import apply_metadata, read_metadata
from calibre.ebooks.metadata.utils import parse_opf, normalize_languages, create_manifest_item, parse_opf_version
from calibre.ebooks.metadata import MetaInformation
from polyglot.builtins import iteritems
class DummyFile:
def __init__(self, raw):
self.raw = raw
def read(self):
return self.raw
def get_metadata2(root, ver):
opf = OPF(None, preparsed_opf=root, read_toc=False)
return opf.to_book_metadata(), ver, opf.raster_cover, opf.first_spine_item()
def get_metadata3(root, ver):
return read_metadata(root, ver=ver, return_extra_data=True)
def get_metadata_from_parsed(root):
ver = parse_opf_version(root.get('version'))
f = get_metadata2 if ver.major < 3 else get_metadata3
return f(root, ver)
def get_metadata(stream):
if isinstance(stream, bytes):
stream = DummyFile(stream)
root = parse_opf(stream)
return get_metadata_from_parsed(root)
def set_metadata_opf2(root, cover_prefix, mi, opf_version,
cover_data=None, apply_null=False, update_timestamp=False, force_identifiers=False, add_missing_cover=True):
mi = MetaInformation(mi)
for x in ('guide', 'toc', 'manifest', 'spine'):
setattr(mi, x, None)
opf = OPF(None, preparsed_opf=root, read_toc=False)
if mi.languages:
mi.languages = normalize_languages(list(opf.raw_languages) or [], mi.languages)
opf.smart_update(mi, apply_null=apply_null)
if getattr(mi, 'uuid', None):
opf.application_id = mi.uuid
if apply_null or force_identifiers:
opf.set_identifiers(mi.get_identifiers())
else:
orig = opf.get_identifiers()
orig.update(mi.get_identifiers())
opf.set_identifiers({k:v for k, v in iteritems(orig) if k and v})
if update_timestamp and mi.timestamp is not None:
opf.timestamp = mi.timestamp
raster_cover = opf.raster_cover
if raster_cover is None and cover_data is not None and add_missing_cover:
guide_raster_cover = opf.guide_raster_cover
i = None
if guide_raster_cover is not None:
i = guide_raster_cover
raster_cover = i.get('href')
else:
if cover_prefix and not cover_prefix.endswith('/'):
cover_prefix += '/'
name = cover_prefix + 'cover.jpg'
i = create_manifest_item(opf.root, name, 'cover')
if i is not None:
raster_cover = name
if i is not None:
if opf_version.major < 3:
[x.getparent().remove(x) for x in opf.root.xpath('//*[local-name()="meta" and @name="cover"]')]
m = opf.create_metadata_element('meta', is_dc=False)
m.set('name', 'cover'), m.set('content', i.get('id'))
else:
for x in opf.root.xpath('//*[local-name()="item" and contains(@properties, "cover-image")]'):
x.set('properties', x.get('properties').replace('cover-image', '').strip())
i.set('properties', 'cover-image')
with pretty_print:
return opf.render(), raster_cover
def set_metadata_opf3(root, cover_prefix, mi, opf_version,
cover_data=None, apply_null=False, update_timestamp=False, force_identifiers=False, add_missing_cover=True):
raster_cover = apply_metadata(
root, mi, cover_prefix=cover_prefix, cover_data=cover_data,
apply_null=apply_null, update_timestamp=update_timestamp,
force_identifiers=force_identifiers, add_missing_cover=add_missing_cover)
return etree.tostring(root, encoding='utf-8'), raster_cover
def set_metadata(stream, mi, cover_prefix='', cover_data=None, apply_null=False, update_timestamp=False, force_identifiers=False, add_missing_cover=True):
if isinstance(stream, bytes):
stream = DummyFile(stream)
root = parse_opf(stream)
ver = parse_opf_version(root.get('version'))
f = set_metadata_opf2 if ver.major < 3 else set_metadata_opf3
opfbytes, raster_cover = f(
root, cover_prefix, mi, ver, cover_data=cover_data,
apply_null=apply_null, update_timestamp=update_timestamp,
force_identifiers=force_identifiers, add_missing_cover=add_missing_cover)
return opfbytes, ver, raster_cover
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