mirror of
https://github.com/kovidgoyal/calibre.git
synced 2025-07-09 03:04:10 -04:00
Refactor parts of OEBBook to sanely handle much more broken OPF.
This commit is contained in:
Marshall T. Vandegrift
parent
a3ad3a07dd
commit
076ec9bbad
@ -10,7 +10,7 @@ import os
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import sys
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from collections import defaultdict
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from types import StringTypes
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from itertools import izip, count
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from itertools import izip, count, chain
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from urlparse import urldefrag, urlparse, urlunparse
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from urllib import unquote as urlunquote
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import logging
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@ -22,6 +22,7 @@ from lxml import html
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from calibre import LoggingInterface
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from calibre.translations.dynamic import translate
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from calibre.startup import get_lang
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from calibre.ebooks.oeb.entitydefs import ENTITYDEFS
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XML_NS = 'http://www.w3.org/XML/1998/namespace'
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XHTML_NS = 'http://www.w3.org/1999/xhtml'
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@ -40,6 +41,7 @@ XPNSMAP = {'h': XHTML_NS, 'o1': OPF1_NS, 'o2': OPF2_NS,
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'd09': DC09_NS, 'd10': DC10_NS, 'd11': DC11_NS,
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'xsi': XSI_NS, 'dt': DCTERMS_NS, 'ncx': NCX_NS,
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'svg': SVG_NS, 'xl': XLINK_NS}
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DC_PREFIXES = ('d11', 'd10', 'd09')
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def XML(name): return '{%s}%s' % (XML_NS, name)
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def XHTML(name): return '{%s}%s' % (XHTML_NS, name)
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@ -61,6 +63,7 @@ GIF_MIME = 'image/gif'
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JPEG_MIME = 'image/jpeg'
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PNG_MIME = 'image/png'
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SVG_MIME = 'image/svg+xml'
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BINARY_MIME = 'application/octet-stream'
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OEB_STYLES = set([CSS_MIME, OEB_CSS_MIME, 'text/x-oeb-css'])
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OEB_DOCS = set([XHTML_MIME, 'text/html', OEB_DOC_MIME, 'text/x-oeb-document'])
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@ -69,6 +72,8 @@ OEB_IMAGES = set([GIF_MIME, JPEG_MIME, PNG_MIME, SVG_MIME])
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MS_COVER_TYPE = 'other.ms-coverimage-standard'
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ENTITY_RE = re.compile(r'&([a-zA-Z_:][a-zA-Z0-9.-_:]+);')
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COLLAPSE_RE = re.compile(r'[ \t\r\n\v]+')
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def element(parent, *args, **kwargs):
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if parent is not None:
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@ -191,11 +196,8 @@ class Metadata(object):
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def __init__(self, term, value, fq_attrib={}, **kwargs):
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self.fq_attrib = fq_attrib = dict(fq_attrib)
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fq_attrib.update(kwargs)
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if term == OPF('meta') and not value:
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term = self.fq_attrib.pop('name')
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value = self.fq_attrib.pop('content')
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elif barename(term).lower() in Metadata.TERMS and \
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(not namespace(term) or namespace(term) in DC_NSES):
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if barename(term).lower() in Metadata.TERMS and \
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(not namespace(term) or namespace(term) in DC_NSES):
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# Anything looking like Dublin Core is coerced
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term = DC(barename(term).lower())
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elif namespace(term) == OPF2_NS:
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@ -329,8 +331,11 @@ class Manifest(object):
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% (self.id, self.href, self.media_type)
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def _force_xhtml(self, data):
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# Possibly decode in user-specified encoding
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if self.oeb.encoding is not None:
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data = data.decode(self.oeb.encoding, 'replace')
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# Force to UNIX line encodings
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data = data.replace('\r\n', '\n').replace('\r', '\n')
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# Handle broken XHTML w/ SVG (ugh)
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if 'svg:' in data and SVG_NS not in data:
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data = data.replace(
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@ -338,18 +343,29 @@ class Manifest(object):
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if 'xlink:' in data and XLINK_NS not in data:
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data = data.replace(
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'<html', '<html xmlns:xlink="%s"' % XLINK_NS, 1)
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# Try with more & more drastic measures to parse
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try:
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data = etree.fromstring(data)
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except etree.XMLSyntaxError:
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data = html.fromstring(data)
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data = etree.tostring(data, encoding=unicode)
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data = etree.fromstring(data)
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repl = lambda m: ENTITYDEFS.get(m.group(1), m.group(0))
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data = ENTITY_RE.sub(repl, data)
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try:
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data = etree.fromstring(data)
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except etree.XMLSyntaxError:
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self.oeb.logger.warn('Parsing file %r as HTML' % self.href)
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data = html.fromstring(data)
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data.attrib.pop('xmlns', None)
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data = etree.tostring(data, encoding=unicode)
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data = etree.fromstring(data)
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# Force into the XHTML namespace
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if namespace(data.tag) != XHTML_NS:
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data.attrib['xmlns'] = XHTML_NS
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data = etree.tostring(data, encoding=unicode)
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data = etree.fromstring(data)
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# Remove any encoding-specifying <meta/> elements
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for meta in self.META_XP(data):
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meta.getparent().remove(meta)
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# Ensure has a <head/>
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head = xpath(data, '/h:html/h:head')
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head = head[0] if head else None
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if head is None:
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@ -364,6 +380,7 @@ class Manifest(object):
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'File %r missing <title/> element' % self.href)
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title = etree.SubElement(head, XHTML('title'))
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title.text = self.oeb.translate(__('Unknown'))
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# Ensure has a <body/>
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if not xpath(data, '/h:html/h:body'):
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self.oeb.logger.warn(
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'File %r missing <body/> element' % self.href)
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@ -494,9 +511,9 @@ class Manifest(object):
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elem = element(parent, 'manifest')
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for item in self.ids.values():
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media_type = item.media_type
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if media_type == XHTML_MIME:
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if media_type in OEB_DOCS:
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media_type = OEB_DOC_MIME
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elif media_type == CSS_MIME:
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elif media_type in OEB_STYLES:
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media_type = OEB_CSS_MIME
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attrib = {'id': item.id, 'href': item.href,
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'media-type': media_type}
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@ -508,6 +525,11 @@ class Manifest(object):
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def to_opf2(self, parent=None):
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elem = element(parent, OPF('manifest'))
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for item in self.ids.values():
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media_type = item.media_type
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if media_type in OEB_DOCS:
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media_type = XHTML_MIME
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elif media_type in OEB_STYLES:
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media_type = CSS_MIME
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attrib = {'id': item.id, 'href': item.href,
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'media-type': item.media_type}
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if item.fallback:
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@ -771,25 +793,19 @@ class OEBBook(object):
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opf = self._read_opf(opfpath)
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self._all_from_opf(opf)
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def _convert_opf1(self, opf):
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# Seriously, seriously wrong
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if namespace(opf.tag) == OPF1_NS:
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opf.tag = barename(opf.tag)
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for elem in opf.iterdescendants():
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if isinstance(elem.tag, basestring) \
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and namespace(elem.tag) == OPF1_NS:
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elem.tag = barename(elem.tag)
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def _clean_opf(self, opf):
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for elem in opf.iter():
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if isinstance(elem.tag, basestring) \
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and namespace(elem.tag) in ('', OPF1_NS):
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elem.tag = OPF(barename(elem.tag))
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attrib = dict(opf.attrib)
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attrib['version'] = '2.0'
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nroot = etree.Element(OPF('package'),
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nsmap={None: OPF2_NS}, attrib=attrib)
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metadata = etree.SubElement(nroot, OPF('metadata'),
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nsmap={'opf': OPF2_NS, 'dc': DC11_NS,
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'xsi': XSI_NS, 'dcterms': DCTERMS_NS})
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for prefix in ('d11', 'd10', 'd09'):
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elements = xpath(opf, 'metadata//%s:*' % prefix)
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if elements: break
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for element in elements:
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dc = lambda prefix: xpath(opf, 'o2:metadata//%s:*' % prefix)
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for element in chain(*(dc(prefix) for prefix in DC_PREFIXES)):
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if not element.text: continue
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tag = barename(element.tag).lower()
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element.tag = '{%s}%s' % (DC11_NS, tag)
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@ -799,28 +815,27 @@ class OEBBook(object):
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element.attrib[nsname] = element.attrib[name]
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del element.attrib[name]
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metadata.append(element)
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for element in opf.xpath('metadata//meta'):
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for element in xpath(opf, 'o2:metadata//o2:meta'):
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metadata.append(element)
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for item in opf.xpath('manifest/item'):
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media_type = item.attrib['media-type'].lower()
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if media_type in OEB_DOCS:
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media_type = XHTML_MIME
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elif media_type in OEB_STYLES:
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media_type = CSS_MIME
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item.attrib['media-type'] = media_type
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for tag in ('manifest', 'spine', 'tours', 'guide'):
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for element in opf.xpath(tag):
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for tag in ('o2:manifest', 'o2:spine', 'o2:tours', 'o2:guide'):
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for element in xpath(opf, tag):
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nroot.append(element)
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return etree.fromstring(etree.tostring(nroot))
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return nroot
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def _read_opf(self, opfpath):
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opf = self.container.read_xml(opfpath)
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version = float(opf.get('version', 1.0))
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opf = self.container.read(opfpath)
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opf = opf.replace('\r\n', '\n').replace('\r', '\n')
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try:
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opf = etree.fromstring(opf)
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except etree.XMLSyntaxError:
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repl = lambda m: ENTITYDEFS.get(m.group(1), m.group(0))
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opf = ENTITY_RE.sub(repl, opf)
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opf = etree.fromstring(opf)
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self.logger.warn('OPF contains invalid HTML named entities')
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ns = namespace(opf.tag)
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if ns not in ('', OPF1_NS, OPF2_NS):
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raise OEBError('Invalid namespace %r for OPF document' % ns)
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if ns != OPF2_NS or version < 2.0:
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opf = self._convert_opf1(opf)
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opf = self._clean_opf(opf)
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return opf
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def _metadata_from_opf(self, opf):
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@ -829,8 +844,16 @@ class OEBBook(object):
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self.metadata = metadata = Metadata(self)
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ignored = (OPF('dc-metadata'), OPF('x-metadata'))
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for elem in xpath(opf, '/o2:package/o2:metadata//*'):
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if elem.tag not in ignored and (elem.text or elem.attrib):
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metadata.add(elem.tag, elem.text, elem.attrib)
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if elem.tag in ignored: continue
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term = elem.tag
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value = elem.text
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if term == OPF('meta'):
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term = elem.attrib.pop('name', None)
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value = elem.attrib.pop('content', None)
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if value:
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value = COLLAPSE_RE.sub(' ', value.strip())
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if term and (value or elem.attrib):
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metadata.add(term, value, elem.attrib)
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haveuuid = haveid = False
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for ident in metadata.identifier:
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if unicode(ident).startswith('urn:uuid:'):
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@ -845,36 +868,38 @@ class OEBBook(object):
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self.uid = item
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break
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else:
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self.logger.warn(u'Unique-identifier %r not found.' % uid)
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self.logger.warn(u'Unique-identifier %r not found' % uid)
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for ident in metadata.identifier:
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if 'id' in ident.attrib:
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self.uid = metadata.identifier[0]
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break
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if not metadata.language:
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self.logger.warn(u'Language not specified.')
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self.logger.warn(u'Language not specified')
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metadata.add('language', get_lang())
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if not metadata.creator:
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self.logger.warn(u'Creator not specified.')
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metadata.add('creator', _('Unknown'))
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self.logger.warn('Creator not specified')
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metadata.add('creator', self.translate(__('Unknown')))
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if not metadata.title:
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self.logger.warn(u'Title not specified.')
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metadata.add('title', _('Unknown'))
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self.logger.warn('Title not specified')
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metadata.add('title', self.translate(__('Unknown')))
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def _manifest_from_opf(self, opf):
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self.manifest = manifest = Manifest(self)
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for elem in xpath(opf, '/o2:package/o2:manifest/o2:item'):
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id = elem.get('id')
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href = elem.get('href')
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media_type = elem.get('media-type')
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media_type = elem.get('media-type', None)
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if media_type is None:
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media_type = elem.get('mediatype', BINARY_MIME)
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fallback = elem.get('fallback')
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if href in manifest.hrefs:
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self.logger.warn(u'Duplicate manifest entry for %r.' % href)
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self.logger.warn(u'Duplicate manifest entry for %r' % href)
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continue
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if not self.container.exists(href):
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self.logger.warn(u'Manifest item %r not found.' % href)
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self.logger.warn(u'Manifest item %r not found' % href)
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continue
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if id in manifest.ids:
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self.logger.warn(u'Duplicate manifest id %r.' % id)
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self.logger.warn(u'Duplicate manifest id %r' % id)
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id, href = manifest.generate(id, href)
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manifest.add(id, href, media_type, fallback)
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@ -883,7 +908,7 @@ class OEBBook(object):
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for elem in xpath(opf, '/o2:package/o2:spine/o2:itemref'):
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idref = elem.get('idref')
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if idref not in self.manifest:
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self.logger.warn(u'Spine item %r not found.' % idref)
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self.logger.warn(u'Spine item %r not found' % idref)
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continue
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item = self.manifest[idref]
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spine.add(item, elem.get('linear'))
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@ -931,7 +956,8 @@ class OEBBook(object):
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item = self.manifest.ids[id]
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ncx = item.data
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self.manifest.remove(item)
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title = xpath(ncx, 'ncx:docTitle/ncx:text/text()')[0]
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title = xpath(ncx, 'ncx:docTitle/ncx:text/text()')
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title = title[0].strip() if title else unicode(self.metadata.title)
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self.toc = toc = TOC(title)
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navmaps = xpath(ncx, 'ncx:navMap')
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for navmap in navmaps:
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@ -988,7 +1014,8 @@ class OEBBook(object):
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if not item.linear: continue
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html = item.data
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title = xpath(html, '/h:html/h:head/h:title/text()')
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if title: titles.append(title[0])
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title = title[0].strip() if title else None
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if title: titles.append(title)
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headers.append('(unlabled)')
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for tag in ('h1', 'h2', 'h3', 'h4', 'h5', 'strong'):
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expr = '/h:html/h:body//h:%s[position()=1]/text()' % (tag,)
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256
src/calibre/ebooks/oeb/entitydefs.py
Normal file
256
src/calibre/ebooks/oeb/entitydefs.py
Normal file
@ -0,0 +1,256 @@
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"""
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Replacement for htmlentitydefs which uses purely numeric entities.
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"""
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__license__ = 'GPL v3'
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__copyright__ = '2008, Marshall T. Vandegrift <llasram@gmail.com>'
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ENTITYDEFS = \
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{'AElig': 'Æ',
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'Aacute': 'Á',
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'Acirc': 'Â',
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'Agrave': 'À',
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'Alpha': 'Α',
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'Aring': 'Å',
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'Atilde': 'Ã',
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'Auml': 'Ä',
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'Beta': 'Β',
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'Ccedil': 'Ç',
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'Chi': 'Χ',
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'Dagger': '‡',
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'Delta': 'Δ',
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'ETH': 'Ð',
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'Eacute': 'É',
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'Ecirc': 'Ê',
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'Egrave': 'È',
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'Epsilon': 'Ε',
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'Eta': 'Η',
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'Euml': 'Ë',
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'Gamma': 'Γ',
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'Iacute': 'Í',
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'Icirc': 'Î',
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'Igrave': 'Ì',
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'Iota': 'Ι',
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'Iuml': 'Ï',
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'Kappa': 'Κ',
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'Lambda': 'Λ',
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'Mu': 'Μ',
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'Ntilde': 'Ñ',
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'Nu': 'Ν',
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'OElig': 'Œ',
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'Oacute': 'Ó',
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'Ocirc': 'Ô',
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'Ograve': 'Ò',
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'Omega': 'Ω',
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'Omicron': 'Ο',
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'Oslash': 'Ø',
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'Otilde': 'Õ',
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'Ouml': 'Ö',
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'Phi': 'Φ',
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'Pi': 'Π',
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'Prime': '″',
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'Psi': 'Ψ',
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'Rho': 'Ρ',
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'Scaron': 'Š',
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'Sigma': 'Σ',
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'THORN': 'Þ',
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'Tau': 'Τ',
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'Theta': 'Θ',
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'Uacute': 'Ú',
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'Ucirc': 'Û',
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'Ugrave': 'Ù',
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'Upsilon': 'Υ',
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'Uuml': 'Ü',
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'Xi': 'Ξ',
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'Yacute': 'Ý',
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'Yuml': 'Ÿ',
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'Zeta': 'Ζ',
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'aacute': 'á',
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'acirc': 'â',
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'acute': '´',
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'aelig': 'æ',
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'agrave': 'à',
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'alefsym': 'ℵ',
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'alpha': 'α',
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'and': '∧',
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'ang': '∠',
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'aring': 'å',
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'asymp': '≈',
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'atilde': 'ã',
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'auml': 'ä',
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'bdquo': '„',
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'beta': 'β',
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'brvbar': '¦',
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'bull': '•',
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'cap': '∩',
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'ccedil': 'ç',
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'cedil': '¸',
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||||
'cent': '¢',
|
||||
'chi': 'χ',
|
||||
'circ': 'ˆ',
|
||||
'clubs': '♣',
|
||||
'cong': '≅',
|
||||
'copy': '©',
|
||||
'crarr': '↵',
|
||||
'cup': '∪',
|
||||
'curren': '¤',
|
||||
'dArr': '⇓',
|
||||
'dagger': '†',
|
||||
'darr': '↓',
|
||||
'deg': '°',
|
||||
'delta': 'δ',
|
||||
'diams': '♦',
|
||||
'divide': '÷',
|
||||
'eacute': 'é',
|
||||
'ecirc': 'ê',
|
||||
'egrave': 'è',
|
||||
'empty': '∅',
|
||||
'emsp': ' ',
|
||||
'ensp': ' ',
|
||||
'epsilon': 'ε',
|
||||
'equiv': '≡',
|
||||
'eta': 'η',
|
||||
'eth': 'ð',
|
||||
'euml': 'ë',
|
||||
'euro': '€',
|
||||
'exist': '∃',
|
||||
'fnof': 'ƒ',
|
||||
'forall': '∀',
|
||||
'frac12': '½',
|
||||
'frac14': '¼',
|
||||
'frac34': '¾',
|
||||
'frasl': '⁄',
|
||||
'gamma': 'γ',
|
||||
'ge': '≥',
|
||||
'hArr': '⇔',
|
||||
'harr': '↔',
|
||||
'hearts': '♥',
|
||||
'hellip': '…',
|
||||
'iacute': 'í',
|
||||
'icirc': 'î',
|
||||
'iexcl': '¡',
|
||||
'igrave': 'ì',
|
||||
'image': 'ℑ',
|
||||
'infin': '∞',
|
||||
'int': '∫',
|
||||
'iota': 'ι',
|
||||
'iquest': '¿',
|
||||
'isin': '∈',
|
||||
'iuml': 'ï',
|
||||
'kappa': 'κ',
|
||||
'lArr': '⇐',
|
||||
'lambda': 'λ',
|
||||
'lang': '〈',
|
||||
'laquo': '«',
|
||||
'larr': '←',
|
||||
'lceil': '⌈',
|
||||
'ldquo': '“',
|
||||
'le': '≤',
|
||||
'lfloor': '⌊',
|
||||
'lowast': '∗',
|
||||
'loz': '◊',
|
||||
'lrm': '‎',
|
||||
'lsaquo': '‹',
|
||||
'lsquo': '‘',
|
||||
'macr': '¯',
|
||||
'mdash': '—',
|
||||
'micro': 'µ',
|
||||
'middot': '·',
|
||||
'minus': '−',
|
||||
'mu': 'μ',
|
||||
'nabla': '∇',
|
||||
'nbsp': ' ',
|
||||
'ndash': '–',
|
||||
'ne': '≠',
|
||||
'ni': '∋',
|
||||
'not': '¬',
|
||||
'notin': '∉',
|
||||
'nsub': '⊄',
|
||||
'ntilde': 'ñ',
|
||||
'nu': 'ν',
|
||||
'oacute': 'ó',
|
||||
'ocirc': 'ô',
|
||||
'oelig': 'œ',
|
||||
'ograve': 'ò',
|
||||
'oline': '‾',
|
||||
'omega': 'ω',
|
||||
'omicron': 'ο',
|
||||
'oplus': '⊕',
|
||||
'or': '∨',
|
||||
'ordf': 'ª',
|
||||
'ordm': 'º',
|
||||
'oslash': 'ø',
|
||||
'otilde': 'õ',
|
||||
'otimes': '⊗',
|
||||
'ouml': 'ö',
|
||||
'para': '¶',
|
||||
'part': '∂',
|
||||
'permil': '‰',
|
||||
'perp': '⊥',
|
||||
'phi': 'φ',
|
||||
'pi': 'π',
|
||||
'piv': 'ϖ',
|
||||
'plusmn': '±',
|
||||
'pound': '£',
|
||||
'prime': '′',
|
||||
'prod': '∏',
|
||||
'prop': '∝',
|
||||
'psi': 'ψ',
|
||||
'rArr': '⇒',
|
||||
'radic': '√',
|
||||
'rang': '〉',
|
||||
'raquo': '»',
|
||||
'rarr': '→',
|
||||
'rceil': '⌉',
|
||||
'rdquo': '”',
|
||||
'real': 'ℜ',
|
||||
'reg': '®',
|
||||
'rfloor': '⌋',
|
||||
'rho': 'ρ',
|
||||
'rlm': '‏',
|
||||
'rsaquo': '›',
|
||||
'rsquo': '’',
|
||||
'sbquo': '‚',
|
||||
'scaron': 'š',
|
||||
'sdot': '⋅',
|
||||
'sect': '§',
|
||||
'shy': '­',
|
||||
'sigma': 'σ',
|
||||
'sigmaf': 'ς',
|
||||
'sim': '∼',
|
||||
'spades': '♠',
|
||||
'sub': '⊂',
|
||||
'sube': '⊆',
|
||||
'sum': '∑',
|
||||
'sup': '⊃',
|
||||
'sup1': '¹',
|
||||
'sup2': '²',
|
||||
'sup3': '³',
|
||||
'supe': '⊇',
|
||||
'szlig': 'ß',
|
||||
'tau': 'τ',
|
||||
'there4': '∴',
|
||||
'theta': 'θ',
|
||||
'thetasym': 'ϑ',
|
||||
'thinsp': ' ',
|
||||
'thorn': 'þ',
|
||||
'tilde': '˜',
|
||||
'times': '×',
|
||||
'trade': '™',
|
||||
'uArr': '⇑',
|
||||
'uacute': 'ú',
|
||||
'uarr': '↑',
|
||||
'ucirc': 'û',
|
||||
'ugrave': 'ù',
|
||||
'uml': '¨',
|
||||
'upsih': 'ϒ',
|
||||
'upsilon': 'υ',
|
||||
'uuml': 'ü',
|
||||
'weierp': '℘',
|
||||
'xi': 'ξ',
|
||||
'yacute': 'ý',
|
||||
'yen': '¥',
|
||||
'yuml': 'ÿ',
|
||||
'zeta': 'ζ',
|
||||
'zwj': '‍',
|
||||
'zwnj': '‌'}
|
||||
Loading…
x
Reference in New Issue
Block a user