import copy
import mimetypes
import os
import re
import tempfile
import urllib.parse
import uuid
import zipfile
import bs4
import tinycss2
from voussoirkit import pathclass
MIMETYPE_CONTENT = 'application/epub+zip'
HTML_LINK_PROPERTIES = {
'a': ['href'],
'audio': ['src'],
'image': ['href', 'xlink:href'],
'img': ['src'],
'link': ['href'],
'script': ['src'],
'source': ['src'],
'track': ['src'],
'video': ['src', 'poster'],
}
EXTENSION_MIMETYPES = {
'htm': 'application/xhtml+xml',
'html': 'application/xhtml+xml',
'otf': 'font/otf',
'pls': 'application/pls+xml',
'smi': 'application/smil+xml',
'smil': 'application/smil+xml',
'sml': 'application/smil+xml',
'ttf': 'font/ttf',
'woff': 'font/woff',
'woff2': 'font/woff2',
'xhtml': 'application/xhtml+xml',
}
MIMETYPE_DIRECTORIES = {
'application/font-sfnt': 'Fonts',
'application/x-dtbncx+xml': '.',
'application/x-font-ttf': 'Fonts',
'application/xhtml+xml': 'Text',
'audio': 'Audio',
'font': 'Fonts',
'image': 'Images',
'text/css': 'Styles',
'video': 'Video',
}
MIMETYPE_FILE_TEMPLATE = 'application/epub+zip'
CONTAINER_XML_TEMPLATE = '''
'''.strip()
OPF_TEMPLATE = '''
{uuid}author
aut
titleund
'''.strip()
NCX_TEMPLATE = '''
{title}
{navpoints}
'''.strip()
NAV_XHTML_TEMPLATE = '''
'''.strip()
TEXT_TEMPLATE = '''
{head_content}
{body_content}
'''.strip()
def compress_epub(directory, epub_filepath):
directory = pathclass.Path(directory)
epub_filepath = pathclass.Path(epub_filepath)
if epub_filepath in directory:
raise ValueError('Epub inside its own directory')
if epub_filepath.extension != 'epub':
epub_filepath = epub_filepath.add_extension('epub')
with zipfile.ZipFile(epub_filepath.absolute_path, 'w') as z:
z.write(directory.with_child('mimetype').absolute_path, arcname='mimetype')
for file in directory.walk():
if file in [directory.with_child('mimetype'), directory.with_child('sigil.cfg')]:
continue
z.write(
file.absolute_path,
arcname=file.relative_to(directory),
compress_type=zipfile.ZIP_DEFLATED,
)
return epub_filepath
def extract_epub(epub_filepath, directory):
epub_filepath = pathclass.Path(epub_filepath)
directory = pathclass.Path(directory)
with zipfile.ZipFile(epub_filepath.absolute_path, 'r') as z:
z.extractall(directory.absolute_path)
def fix_xhtml(xhtml, return_soup=False):
if isinstance(xhtml, bs4.BeautifulSoup):
soup = xhtml
else:
# For the text pages, html5lib is the best because html.parser and lxml
# lowercase all attributes, breaking svg's case-sensitive viewBox etc.
# and xml loses all of the namespaces when namespaced elements are nested
# like .
# The downside of html5lib is it turns the xml declaration at the top
# into a comment which we must undo manually.
soup = bs4.BeautifulSoup(xhtml, 'html5lib')
if not soup.html:
html = soup.new_tag('html')
for child in list(soup.contents):
html.append(child)
soup.append(html)
if not soup.html.body:
body = soup.new_tag('body')
for child in list(soup.html.contents):
body.append(child)
soup.html.append(body)
if not soup.html.get('xmlns'):
soup.html['xmlns'] = 'http://www.w3.org/1999/xhtml'
try:
doctype = next(i for i in soup.contents if isinstance(i, bs4.Doctype))
except StopIteration:
doctype = bs4.Doctype('html')
soup.html.insert_before(doctype)
# html5lib turns the xml declaration into a comment which we must revert.
try:
if isinstance(soup.contents[0], bs4.Comment):
declaration = bs4.Declaration('xml version="1.0" encoding="utf-8"')
soup.insert(0, declaration)
declaration.next.extract()
except StopIteration:
pass
try:
declaration = next(i for i in soup.contents if isinstance(i, bs4.Declaration))
except StopIteration:
declaration = bs4.Declaration('xml version="1.0" encoding="utf-8"')
doctype.insert_before(declaration)
if return_soup:
return soup
return str(soup)
def get_directory_for_mimetype(mime):
directory = (
MIMETYPE_DIRECTORIES.get(mime) or
MIMETYPE_DIRECTORIES.get(mime.split('/')[0]) or
'Misc'
)
return directory
def get_mimetype_for_basename(basename):
extension = os.path.splitext(basename)[1].strip('.')
mime = (
EXTENSION_MIMETYPES.get(extension) or
mimetypes.guess_type(basename)[0] or
'application/octet-stream'
)
return mime
def make_manifest_item(id, href, mime):
manifest_item = f''
# 'html.parser' just for having the simplest output.
manifest_item = bs4.BeautifulSoup(manifest_item, 'html.parser')
return manifest_item.item
def make_meta_item(content=None, attrs=None):
if content:
meta_item = f'{content}'
else:
meta_item = f''
meta_item = bs4.BeautifulSoup(meta_item, 'html.parser')
if attrs:
meta_item.attrs.update(attrs)
return meta_item.meta
def make_spine_item(id):
spine_item = f''
# 'html.parser' just for having the simplest output.
spine_item = bs4.BeautifulSoup(spine_item, 'html.parser')
return spine_item.itemref
class EpubfileException(Exception):
error_message = ''
def __init__(self, *args, **kwargs):
super().__init__()
self.given_args = args
self.given_kwargs = kwargs
self.error_message = self.error_message.format(*args, **kwargs)
self.args = (self.error_message, args, kwargs)
def __str__(self):
return self.error_message
class InvalidEpub(EpubfileException):
error_message = '{} is invalid: {}'
class FileExists(EpubfileException):
error_message = 'There is already a file at {}.'
class IDExists(EpubfileException):
error_message = 'There is already a file with id {}.'
class NotInManifest(EpubfileException):
error_message = '{} is not in the manifest.'
class NotInSpine(EpubfileException):
error_message = '{} is not in the spine.'
class Epub:
def __init__(self, directory, _original_epub_filepath=None):
if isinstance(directory, tempfile.TemporaryDirectory):
self._tempdir_reference = directory
directory = directory.name
self.root_directory = pathclass.Path(directory, force_sep='/')
self._original_path = _original_epub_filepath or self.root_directory.absolute_path
self.opf_filepath = None
self.opf = None
self.read_opf(self.get_opfs()[0])
def __repr__(self):
return f'Epub({repr(self.root_directory.absolute_path)})'
def assert_file_not_exists(self, filepath):
if filepath.exists:
existing = filepath.relative_to(self.opf_filepath.parent)
raise FileExists(existing)
def assert_id_not_exists(self, id):
if self.opf.manifest.find('item', {'id': id}):
raise IDExists(id)
# VALIDATION
############################################################################
def auto_correct_and_validate(self):
# Ensure we have a mimetype file.
mimetype_file = self.root_directory.with_child('mimetype')
if not mimetype_file.exists:
with open(mimetype_file.absolute_path, 'w', encoding='utf-8') as handle:
handle.write(MIMETYPE_FILE_TEMPLATE)
# Assert that all manifest items exist on disk.
for item in self.get_manifest_items(soup=True):
filepath = self.get_filepath(item['id'])
if not filepath.exists:
raise InvalidEpub(self._original_path, f'Manifest item {item["id"]} = {item["href"]} does not exist.')
# LOADING AND SAVING
############################################################################
@classmethod
def new(cls):
def writefile(filepath, content):
os.makedirs(filepath.parent.absolute_path, exist_ok=True)
with open(filepath.absolute_path, 'w', encoding='utf-8') as handle:
handle.write(content)
uid = uuid.uuid4().urn
tempdir = tempfile.TemporaryDirectory(prefix='epubfile-')
root = pathclass.Path(tempdir.name)
writefile(root.join('mimetype'), MIMETYPE_FILE_TEMPLATE)
writefile(root.join('META-INF/container.xml'), CONTAINER_XML_TEMPLATE)
writefile(root.join('OEBPS/content.opf'), OPF_TEMPLATE.format(uuid=uid))
writefile(root.join('OEBPS/toc.ncx'), NCX_TEMPLATE.format(uuid=uid, title='Unknown', navpoints=''))
writefile(root.join('OEBPS/Text/nav.xhtml'), NAV_XHTML_TEMPLATE.format(toc_contents=''))
return cls(tempdir)
@classmethod
def open(cls, epub_filepath):
extract_to = tempfile.TemporaryDirectory(prefix='epubfile-')
extract_epub(epub_filepath, extract_to.name)
return cls(extract_to, _original_epub_filepath=epub_filepath)
def save(self, epub_filepath):
self.write_opf()
self.auto_correct_and_validate()
compress_epub(self.root_directory, epub_filepath)
# CONTAINER & OPF
############################################################################
def get_opfs(self):
container = self.read_container_xml()
rootfiles = container.find_all('rootfile')
rootfiles = [x.get('full-path') for x in rootfiles]
rootfiles = [self.root_directory.join(x) for x in rootfiles]
return rootfiles
def read_container_xml(self):
container_xml_path = self.root_directory.join('META-INF/container.xml')
container = open(container_xml_path.absolute_path, 'r', encoding='utf-8')
# 'xml' and 'html.parser' seem about even here except that html.parser doesn't self-close.
container = bs4.BeautifulSoup(container, 'xml')
return container
def read_opf(self, rootfile):
rootfile = pathclass.Path(rootfile, force_sep='/')
rootfile_xml = open(rootfile.absolute_path, 'r', encoding='utf-8').read()
# 'html.parser' preserves namespacing the best, but unfortunately it
# botches the items because it wants them to be self-closing
# and the string contents come out. We will fix in just a moment.
# This is still preferable to 'xml' which handles the dc: prefixes when
# parsing only the metadata block, but loses all namespaces when parsing
# the whole doc. 'lxml' wraps the content in and also
# botches the metas so it's not any better than html.parser.
self.opf = bs4.BeautifulSoup(rootfile_xml, 'html.parser')
# Let's fix those metas.
metas = self.opf.select('meta')
for meta in metas:
neighbor = meta.next
if neighbor.parent != meta.parent:
break
if not isinstance(neighbor, bs4.element.NavigableString):
continue
meta.append(neighbor.extract().strip())
self.opf_filepath = rootfile
return self.opf
def write_container_xml(self, container):
if isinstance(container, bs4.BeautifulSoup):
container = str(container)
container_xml_path = self.root_directory.join('META-INF/container.xml')
container_xml = open(container_xml_path.absolute_path, 'w', encoding='utf-8')
container_xml.write(container)
def write_opf(self):
with open(self.opf_filepath.absolute_path, 'w', encoding='utf-8') as rootfile:
rootfile.write(str(self.opf))
# FILE OPERATIONS
############################################################################
def add_file(self, id, basename, content):
self.assert_id_not_exists(id)
basename = os.path.basename(basename)
mime = get_mimetype_for_basename(basename)
directory = get_directory_for_mimetype(mime)
directory = self.opf_filepath.parent.with_child(directory)
os.makedirs(directory.absolute_path, exist_ok=True)
filepath = directory.with_child(basename)
self.assert_file_not_exists(filepath)
if mime == 'application/xhtml+xml':
# bs4 converts bytes to str so this must come before the handle choice.
content = fix_xhtml(content)
if isinstance(content, str):
handle = open(filepath.absolute_path, 'w', encoding='utf-8')
elif isinstance(content, bytes):
handle = open(filepath.absolute_path, 'wb')
else:
raise TypeError(type(content))
with handle:
handle.write(content)
href = filepath.relative_to(self.opf_filepath.parent, simple=True)
href = urllib.parse.quote(href)
manifest_item = make_manifest_item(id, href, mime)
self.opf.manifest.append(manifest_item)
if mime == 'application/xhtml+xml':
spine_item = make_spine_item(id)
self.opf.spine.append(spine_item)
return id
def easy_add_file(self, filepath):
filepath = pathclass.Path(filepath)
with open(filepath.absolute_path, 'rb') as handle:
self.add_file(
id=filepath.basename,
basename=filepath.basename,
content=handle.read(),
)
def delete_file(self, id):
os.remove(self.get_filepath(id).absolute_path)
spine_item = self.opf.spine.find('itemref', {'idref': id})
if spine_item:
spine_item.extract()
manifest_item = self.opf.manifest.find('item', {'id': id})
manifest_item.extract()
def get_filepath(self, id):
href = self.opf.manifest.find('item', {'id': id})['href']
filepath = self.opf_filepath.parent.join(href)
if not filepath.exists:
href = urllib.parse.unquote(href)
filepath = self.opf_filepath.parent.join(href)
return filepath
def open_file(self, id, mode):
if mode not in ('r', 'w'):
raise ValueError(f'Mode {mode} should be either r or w.')
filepath = self.get_filepath(id)
mime = self.opf.manifest.find('item', {'id': id})['media-type']
is_text = (
mime in ('application/xhtml+xml', 'application/x-dtbncx+xml') or
mime.startswith('text/')
)
if is_text:
handle = open(filepath.absolute_path, mode, encoding='utf-8')
else:
handle = open(filepath.absolute_path, mode + 'b')
return handle
def read_file(self, id, *, soup=False):
# text vs binary handled by open_file.
content = self.open_file(id, 'r').read()
if soup and self.get_manifest_item(id)['media-type'] == 'application/xhtml+xml':
return fix_xhtml(content, return_soup=True)
return content
def rename_file(self, id, new_basename=None, *, fix_interlinking=True):
if isinstance(id, dict):
basename_map = id
else:
if new_basename is None:
raise TypeError('new_basename can be omitted if id is a dict.')
basename_map = {id: new_basename}
rename_map = {}
for (id, new_basename) in basename_map.items():
old_filepath = self.get_filepath(id)
new_filepath = old_filepath.parent.with_child(new_basename)
if not new_filepath.extension:
new_filepath = new_filepath.add_extension(old_filepath.extension)
self.assert_file_not_exists(new_filepath)
os.rename(old_filepath.absolute_path, new_filepath.absolute_path)
rename_map[old_filepath] = new_filepath
if fix_interlinking:
self.fix_interlinking(rename_map)
else:
self.fix_interlinking_opf(rename_map)
return rename_map
def write_file(self, id, content):
# text vs binary handled by open_file.
if isinstance(content, bs4.BeautifulSoup):
content = str(content)
with self.open_file(id, 'w') as handle:
handle.write(content)
# GETTING THINGS
############################################################################
def get_manifest_items(self, filter='', soup=False, spine_order=False):
query = f'item{filter}'
items = self.opf.manifest.select(query)
if spine_order:
items = {x['id']: x for x in items}
ordered_items = []
for spine_id in self.get_spine_order():
ordered_items.append(items.pop(spine_id))
ordered_items.extend(items.values())
items = ordered_items
if soup:
return items
return [x['id'] for x in items]
def get_manifest_item(self, id):
item = self.opf.manifest.find('item', {'id': id})
if not item:
raise NotInManifest(id)
return item
def get_fonts(self, *, soup=False):
return self.get_manifest_items(
filter='[media-type^="application/font"],[media-type^="font/"]',
soup=soup,
)
def get_images(self, *, soup=False):
return self.get_manifest_items(
filter='[media-type^="image/"]',
soup=soup,
)
def get_media(self, *, soup=False):
return self.get_manifest_items(
filter='[media-type^="video/"],[media-type^="audio/"]',
soup=soup,
)
def get_nav(self, *, soup=False):
nav = self.opf.manifest.find('item', {'properties': 'nav'})
if not nav:
return None
if soup:
return nav
return nav['id']
def get_ncx(self, *, soup=False):
ncx = self.opf.manifest.find('item', {'media-type': 'application/x-dtbncx+xml'})
if not ncx:
return None
if soup:
return ncx
return ncx['id']
def get_styles(self, *, soup=False):
return self.get_manifest_items(
filter='[media-type="text/css"]',
soup=soup,
)
def get_texts(self, *, soup=False, skip_nav=False):
texts = self.get_manifest_items(
filter='[media-type="application/xhtml+xml"]',
soup=True,
spine_order=True,
)
if skip_nav:
texts = [x for x in texts if x.get('properties') != 'nav']
if soup:
return texts
return [x['id'] for x in texts]
# COVER
############################################################################
def get_cover_image(self, *, soup=False):
cover = self.opf.manifest.find('item', {'properties': 'cover-image'})
if cover:
return cover if soup else cover['id']
cover = self.opf.metadata.find('meta', {'name': 'cover'})
if cover:
return cover if soup else cover['content']
return None
def remove_cover_image(self):
current_cover = self.get_cover_image(soup=True)
if not current_cover:
return
del current_cover['properties']
meta = self.opf.metadata.find('meta', {'name': 'cover'})
if meta:
meta.extract()
def set_cover_image(self, id):
if id is None:
self.remove_cover_image()
current_cover = self.get_cover_image(soup=True)
if not current_cover:
pass
elif current_cover['id'] == id:
return
else:
del current_cover['properties']
manifest_item = self.get_manifest_item(id)
manifest_item['properties'] = 'cover-image'
current_meta = self.opf.metadata.find('meta', {'name': 'cover'})
if current_meta:
current_meta[content] = id
else:
meta = make_meta_item(attrs={'name': 'cover', 'content': id})
self.opf.metadata.append(meta)
# SPINE
############################################################################
def get_spine_order(self, *, linear_only=False):
items = self.opf.spine.find_all('itemref')
if linear_only:
items = [x for x in items if x.get('linear') != 'no']
return [x['idref'] for x in items]
return ids
def set_spine_order(self, ids):
manifest_ids = self.get_manifest_items()
# Fetch the existing entries so that we can preserve their attributes
# while rearranging, only creating new spine entries for ids that aren't
# already present.
spine_items = self.opf.spine.select('itemref')
spine_items = {item['idref']: item for item in spine_items}
for id in ids:
if id not in manifest_ids:
raise NotInManifest(id)
if id in spine_items:
self.opf.spine.append(spine_items.pop(id))
else:
self.opf.spine.append(make_spine_item(id))
# The remainder of the current spine items were not used, so pop them out.
for spine_item in spine_items.values():
spine_item.extract()
def get_spine_linear(self, id):
spine_item = self.opf.spine.find('itemref', {'idref': id})
if not spine_item:
raise NotInSpine(id)
linear = spine_item.get('linear')
linear = {None: None, 'yes': True, 'no': False}.get(linear, linear)
return linear
def set_spine_linear(self, id, linear):
'''
Set linear to yes or no. Or pass None to remove the property.
'''
spine_item = self.opf.spine.find('itemref', {'idref': id})
if not spine_item:
raise NotInSpine(id)
if linear is None:
del spine_item['linear']
return
if isinstance(linear, str):
if linear not in ('yes', 'no'):
raise ValueError(f'Linear must be yes or no, not {linear}.')
elif isinstance(linear, (bool, int)):
linear = {True: 'yes', False: 'no'}[bool(linear)]
else:
raise TypeError(linear)
spine_item['linear'] = linear
# METADATA
############################################################################
def get_authors(self):
'''
Thank you double_j for showing how to deal with find_all not working
on namespaced tags.
https://stackoverflow.com/a/44681560
'''
creators = self.opf.metadata.find_all({'dc:creator'})
creators = [str(c.contents[0]) for c in creators if len(c.contents) == 1]
return creators
def get_languages(self):
languages = self.opf.metadata.find_all({'dc:language'})
languages = [str(l.contents[0]) for l in languages if len(l.contents) == 1]
return languages
def get_titles(self):
titles = self.opf.metadata.find_all({'dc:title'})
titles = [str(t.contents[0]) for t in titles if len(t.contents) == 1]
return titles
# UTILITIES
############################################################################
def fix_all_xhtml(self):
for id in self.get_texts():
self.write_file(id, self.read_file(id, soup=True))
@staticmethod
def _fix_interlinking_helper(link, rename_map, relative_to, old_relative_to=None):
if link is None:
return None
link = urllib.parse.urlsplit(link)
if link.scheme:
return None
if old_relative_to is None:
old_relative_to = relative_to
new_filepath = (
rename_map.get(link.path) or
rename_map.get(old_relative_to.join(link.path)) or
rename_map.get(old_relative_to.join(urllib.parse.unquote(link.path))) or
None
)
if new_filepath is None:
return None
link = link._replace(path=new_filepath.relative_to(relative_to, simple=True))
link = link._replace(path=urllib.parse.quote(link.path))
return link.geturl()
@staticmethod
def _fix_interlinking_css_helper(tag):
links = []
commit = lambda: None
if not isinstance(tag, bs4.element.Tag):
pass
elif tag.name == 'style' and tag.contents:
style = tinycss2.parse_stylesheet(tag.contents[0])
links = [
token
for rule in style if isinstance(rule, tinycss2.ast.QualifiedRule)
for token in rule.content if isinstance(token, tinycss2.ast.URLToken)
]
commit = lambda: tag.contents[0].replace_with(tinycss2.serialize(style))
elif tag.get('style'):
style = tinycss2.parse_declaration_list(tag['style'])
links = [
token
for declaration in style if isinstance(declaration, tinycss2.ast.Declaration)
for token in declaration.value if isinstance(token, tinycss2.ast.URLToken)
]
commit = lambda: tag.attrs.update(style=tinycss2.serialize(style))
return (links, commit)
def fix_interlinking_text(self, id, rename_map, old_relative_to=None):
if not rename_map:
return
text_parent = self.get_filepath(id).parent
soup = self.read_file(id, soup=True)
for tag in soup.descendants:
for link_property in HTML_LINK_PROPERTIES.get(tag.name, []):
link = tag.get(link_property)
link = self._fix_interlinking_helper(link, rename_map, text_parent, old_relative_to)
if not link:
continue
tag[link_property] = link
(style_links, style_commit) = self._fix_interlinking_css_helper(tag)
for token in style_links:
link = token.value
link = self._fix_interlinking_helper(link, rename_map, text_parent, old_relative_to)
if not link:
continue
token.value = link
style_commit()
text = str(soup)
self.write_file(id, text)
def fix_interlinking_ncx(self, rename_map, old_relative_to=None):
if not rename_map:
return
ncx_id = self.get_ncx()
if not ncx_id:
return
ncx_parent = self.get_filepath(ncx_id).parent
ncx = self.read_file(ncx_id)
# 'xml' because 'lxml' and 'html.parser' lowercase the navPoint tag name.
ncx = bs4.BeautifulSoup(ncx, 'xml')
for point in ncx.select('navPoint > content[src]'):
link = point['src']
link = self._fix_interlinking_helper(link, rename_map, ncx_parent, old_relative_to)
if not link:
continue
point['src'] = link
ncx = str(ncx)
self.write_file(ncx_id, ncx)
def fix_interlinking_opf(self, rename_map):
if not rename_map:
return
opf_parent = self.opf_filepath.parent
for opf_item in self.opf.select('guide > reference[href], manifest > item[href]'):
link = opf_item['href']
link = self._fix_interlinking_helper(link, rename_map, opf_parent)
if not link:
continue
opf_item['href'] = link
def fix_interlinking(self, rename_map):
if not rename_map:
return
self.fix_interlinking_opf(rename_map)
for id in self.get_texts():
self.fix_interlinking_text(id, rename_map)
self.fix_interlinking_ncx(rename_map)
def _set_nav_toc(self, nav_id, new_toc):
for li in new_toc.find_all('li'):
href = li['nav_anchor']
atag = new_toc.new_tag('a')
atag.append(li['text'])
atag['href'] = href
li.insert(0, atag)
del li['nav_anchor']
del li['ncx_anchor']
del li['text']
soup = self.read_file(nav_id, soup=True)
toc = soup.find('nav', {'epub:type': 'toc'})
if not toc:
toc = soup.new_tag('nav')
toc['epub:type'] = 'toc'
soup.body.insert(0, toc)
if toc.ol:
toc.ol.extract()
toc.append(new_toc.ol)
self.write_file(nav_id, soup)
def _set_ncx_toc(self, ncx_id, new_toc):
play_order = 1
def li_to_navpoint(li):
# result:
#
#
# {text}
#
#
# {children}
#
nonlocal play_order
navpoint = new_toc.new_tag('navPoint', id=f'navPoint{play_order}', playOrder=play_order)
play_order += 1
label = new_toc.new_tag('navLabel')
text = new_toc.new_tag('text')
text.append(li['text'])
label.append(text)
navpoint.append(label)
content = new_toc.new_tag('content', src=li['ncx_anchor'])
navpoint.append(content)
children = li.ol.children if li.ol else []
children = [li_to_navpoint(li) for li in children]
for child in children:
navpoint.append(child)
return navpoint
# xml because we have to preserve the casing on navMap.
soup = bs4.BeautifulSoup(self.read_file(ncx_id), 'xml')
navmap = soup.navMap
for child in list(navmap.children):
child.extract()
for li in list(new_toc.ol.children):
navpoint = li_to_navpoint(li)
li.insert_before(navpoint)
li.extract()
for navpoint in list(new_toc.ol.children):
navmap.append(navpoint)
self.write_file(ncx_id, soup)
def generate_toc(self, max_level=None, linear_only=True):
'''
Generate the table of contents (toc.nav and nav.xhtml) by collecting
..
throughout all of the text documents.
'''
def new_list(root=False):
r = bs4.BeautifulSoup('', 'html.parser')
if root:
return r
return r.ol
nav_id = self.get_nav()
if nav_id:
nav_filepath = self.get_filepath(nav_id)
ncx_id = self.get_ncx()
if ncx_id:
ncx_filepath = self.get_filepath(ncx_id)
if not nav_id and not ncx_id:
return
toc = new_list(root=True)
current_level = None
current_list = toc.ol
toc_line_index = 1
HEADER_TAGS = ['h1', 'h2', 'h3', 'h4', 'h5', 'h6']
spine = self.get_spine_order(linear_only=linear_only)
spine = [s for s in spine if s != nav_id]
for file_id in spine:
file_path = self.get_filepath(file_id)
soup = self.read_file(file_id, soup=True)
for header in soup.descendants:
if header.name not in HEADER_TAGS:
continue
# 'hX' -> X
level = int(header.name[1])
if max_level is not None and level > max_level:
continue
header['id'] = f'toc_{toc_line_index}'
toc_line_index += 1
toc_line = toc.new_tag('li')
toc_line['text'] = header.text
if nav_id:
relative = file_path.relative_to(nav_filepath.parent, simple=True)
toc_line['nav_anchor'] = f'{relative}#{header["id"]}'
if ncx_id:
relative = file_path.relative_to(ncx_filepath.parent, simple=True)
toc_line['ncx_anchor'] = f'{relative}#{header["id"]}'
if current_level is None:
current_level = level
while level < current_level:
current_level -= 1
# Because the sub- are actually a child of the last
#
of the previous , we must .parent twice.
current_list = current_list.parent
if current_list.name == 'li':
current_list = current_list.parent
# If the file has headers in a non-ascending order, like an
# h4 and then an h1, then backstepping too far will take us
# out of the list. So at that point we can just snap
# current_level and start using the root list again.
if current_list == toc:
current_level = level
current_list = toc.ol
if level > current_level:
current_level = level
# In order to properly render nested , you're supposed
# to make the new a child of the last
of the
# previous .
# Don't worry, .children can never be empty because on the
# first
this condition can never occur, and new s
# always receive a child right after being created.
_l = new_list()
list(current_list.children)[-1].append(_l)
current_list = _l
current_list.append(toc_line)
# We have to save the id="toc_X" that we gave to all the headers.
self.write_file(file_id, soup)
if nav_id:
self._set_nav_toc(nav_id, copy.copy(toc))
if ncx_id:
self._set_ncx_toc(ncx_id, copy.copy(toc))
def move_nav_to_end(self):
'''
Move the nav.xhtml file to the end and set linear=no.
'''
nav = self.get_nav()
if not nav:
return
spine = self.get_spine_order()
for (index, id) in enumerate(spine):
if id == nav:
spine.append(spine.pop(index))
break
else:
spine.append(nav)
self.set_spine_order(spine)
self.set_spine_linear(nav, False)
def normalize_directory_structure(self):
# This must come before the opf rewrite because that would affect the
# location of all all manifest item hrefs.
manifest_items = self.get_manifest_items(soup=True)
old_filepaths = {item['id']: self.get_filepath(item['id']) for item in manifest_items}
old_ncx = self.get_ncx()
try:
old_ncx_parent = self.get_filepath(self.get_ncx()).parent
except Exception:
old_ncx_parent = None
if self.opf_filepath.parent == self.root_directory:
oebps = self.root_directory.with_child('OEBPS')
os.makedirs(oebps.absolute_path, exist_ok=True)
self.write_opf()
new_opf_path = oebps.with_child(self.opf_filepath.basename)
os.rename(self.opf_filepath.absolute_path, new_opf_path.absolute_path)
container = self.read_container_xml()
rootfile = container.find('rootfile', {'full-path': self.opf_filepath.basename})
rootfile['full-path'] = new_opf_path.relative_to(self.root_directory, simple=True)
self.write_container_xml(container)
self.opf_filepath = new_opf_path
rename_map = {}
for manifest_item in manifest_items:
old_filepath = old_filepaths[manifest_item['id']]
directory = get_directory_for_mimetype(manifest_item['media-type'])
directory = self.opf_filepath.parent.with_child(directory)
os.makedirs(directory.absolute_path, exist_ok=True)
new_filepath = directory.with_child(old_filepath.basename)
if new_filepath != old_filepath:
rename_map[old_filepath] = new_filepath
os.rename(old_filepath.absolute_path, new_filepath.absolute_path)
manifest_item['href'] = new_filepath.relative_to(self.opf_filepath.parent, simple=True)
self.fix_interlinking_opf(rename_map)
for id in self.get_texts():
self.fix_interlinking_text(id, rename_map, old_relative_to=old_filepaths[id].parent)
self.fix_interlinking_ncx(rename_map, old_relative_to=old_ncx_parent)
# COMMAND LINE TOOLS
################################################################################
import argparse
import glob
import html
import random
import string
import sys
from voussoirkit import betterhelp
DOCSTRING = '''
{addfile}
{covercomesfirst}
{holdit}
{merge}
{normalize}
'''.lstrip()
SUB_DOCSTRINGS = {
'addfile':
'''
addfile:
Add files into the book.
> epubfile.py addfile book.epub page1.html image.jpg
'''.strip(),
'covercomesfirst':
'''
covercomesfirst:
Rename the cover image file so that it is the alphabetically-first image.
> epubfile.py covercomesfirst book.epub
I use CBXShell to get thumbnails of epub files on Windows, and because it
is generalized for zip files and doesn't read epub metadata, alphabetized
mode works best for getting epub covers as icons.
In my testing, CBXShell considers the image's whole path and not just the
basename, so you may want to consider normalizing the directory structure
first, otherwise some /a/image.jpg will always be before /images/cover.jpg.
'''.strip(),
'generate_toc':
'''
generate_toc:
Regenerate the toc.ncx and nav.xhtml based on headers in the files.
> epubfile.py generate_toc book.epub epubfile.py holdit book.epub
''',
'merge':
'''
merge:
Merge multiple books into one.
> epubfile.py merge book1.epub book2.epub --output final.epub
flags:
--headerfile:
Add a file before each book with an
containing its title.
-y | --autoyes:
Overwrite the output file without prompting.
'''.strip(),
'normalize':
'''
normalize:
Rename files and directories in the book to match a common structure.
Moves all book content from / into /OEBPS and sorts files into
subdirectories by type: Text, Images, Styles, etc.
> epubfile.py normalize book.epub
'''.strip()
}
DOCSTRING = betterhelp.add_previews(DOCSTRING, SUB_DOCSTRINGS)
def random_string(length, characters=string.ascii_lowercase):
return ''.join(random.choice(characters) for x in range(length))
def addfile_argparse(args):
book = Epub.open(args.epub)
for file in args.files:
print(f'Adding file {file}.')
file = pathclass.Path(file)
try:
book.easy_add_file(file)
except (IDExists, FileExists) as exc:
rand_suffix = random_string(3, string.digits)
base = file.replace_extension('').basename
id = f'{base}_{rand_suffix}'
basename = f'{base}_{rand_suffix}{file.dot_extension}'
content = open(file.absolute_path, 'rb').read()
book.add_file(id, basename, content)
book.move_nav_to_end()
book.save(args.epub)
def covercomesfirst(book):
basenames = {i: book.get_filepath(i).basename for i in book.get_images()}
if len(basenames) <= 1:
return
cover_image = book.get_cover_image()
if not cover_image:
return
cover_basename = book.get_filepath(cover_image).basename
cover_index = sorted(basenames.values()).index(cover_basename)
if cover_index == 0:
return
rename_map = basenames.copy()
if not cover_basename.startswith('!'):
cover_basename = '!' + cover_basename
rename_map[cover_image] = cover_basename
else:
rename_map.pop(cover_image)
for (id, basename) in rename_map.copy().items():
if id == cover_image:
continue
if basename > cover_basename:
rename_map.pop(id)
continue
if basename < cover_basename and basename.startswith('!'):
basename = basename.lstrip('!')
rename_map[id] = basename
if basename < cover_basename or basename.startswith('.'):
basename = '_' + basename
rename_map[id] = basename
book.rename_file(rename_map)
book.save(args.epub)
def covercomesfirst_argparse(args):
epubs = [epub for pattern in args.epubs for epub in glob.glob(pattern)]
for epub in epubs:
print(epub)
book = Epub.open(epub)
covercomesfirst(book)
def generate_toc_argparse(args):
epubs = [epub for pattern in args.epubs for epub in glob.glob(pattern)]
books = []
for epub in epubs:
book = Epub.open(epub)
book.generate_toc(max_level=int(args.max_level) if args.max_level else None)
book.save(epub)
def holdit_argparse(args):
epubs = [epub for pattern in args.epubs for epub in glob.glob(pattern)]
books = []
for epub in epubs:
book = Epub.open(epub)
print(f'{epub} = {book.root_directory.absolute_path}')
books.append((epub, book))
input('Press Enter when ready.')
for (epub, book) in books:
# Saving re-writes the opf from memory, which might undo any manual changes.
# So let's re-read it first.
book.read_opf(book.opf_filepath)
book.save(epub)
def merge(input_filepaths, output_filename, do_headerfile=False):
book = Epub.new()
index_length = len(str(len(input_filepaths)))
rand_prefix = random_string(3, string.digits)
input_filepaths = [pathclass.Path(p) for pattern in input_filepaths for p in glob.glob(pattern)]
for (index, input_filepath) in enumerate(input_filepaths):
print(f'Merging {input_filepath.absolute_path}.')
prefix = f'{rand_prefix}_{index:>0{index_length}}_{{}}'
input_book = Epub.open(input_filepath)
input_book.normalize_directory_structure()
input_ncx = input_book.get_ncx()
input_nav = input_book.get_nav()
manifest_ids = input_book.get_manifest_items(spine_order=True)
manifest_ids = [x for x in manifest_ids if x not in (input_ncx, input_nav)]
basename_map = {}
for id in manifest_ids:
old_basename = input_book.get_filepath(id).basename
new_basename = prefix.format(old_basename)
basename_map[id] = new_basename
# Don't worry, we're not going to save this!
input_book.rename_file(basename_map)
if do_headerfile:
content = ''
try:
title = input_book.get_titles()[0]
except IndexError:
title = input_filepath.replace_extension('').basename
finally:
content += f'
{html.escape(title)}
'
try:
author = input_book.get_authors()[0]
content += f'
{html.escape(author)}
'
except IndexError:
pass
headerfile_id = prefix.format('headerfile')
headerfile_basename = prefix.format('headerfile.html')
book.add_file(headerfile_id, headerfile_basename, content)
for id in manifest_ids:
new_id = f'{rand_prefix}_{index:>0{index_length}}_{id}'
new_basename = basename_map[id]
book.add_file(new_id, new_basename, input_book.read_file(id))
book.move_nav_to_end()
book.save(output_filename)
def merge_argparse(args):
if os.path.exists(args.output):
ok = args.autoyes
if not ok:
ok = input(f'Overwrite {args.output}? y/n\n>').lower() in ('y', 'yes')
if not ok:
raise ValueError(f'{args.output} exists.')
return merge(input_filepaths=args.epubs, output_filename=args.output, do_headerfile=args.headerfile)
def normalize_argparse(args):
epubs = [epub for pattern in args.epubs for epub in glob.glob(pattern)]
for epub in epubs:
print(epub)
book = Epub.open(epub)
book.normalize_directory_structure()
book.move_nav_to_end()
book.save(epub)
@betterhelp.subparser_betterhelp(main_docstring=DOCSTRING, sub_docstrings=SUB_DOCSTRINGS)
def main(argv):
parser = argparse.ArgumentParser(description=__doc__)
subparsers = parser.add_subparsers()
p_addfile = subparsers.add_parser('addfile')
p_addfile.add_argument('epub')
p_addfile.add_argument('files', nargs='+', default=[])
p_addfile.set_defaults(func=addfile_argparse)
p_covercomesfirst = subparsers.add_parser('covercomesfirst')
p_covercomesfirst.add_argument('epubs', nargs='+', default=[])
p_covercomesfirst.set_defaults(func=covercomesfirst_argparse)
p_generate_toc = subparsers.add_parser('generate_toc')
p_generate_toc.add_argument('epubs', nargs='+', default=[])
p_generate_toc.add_argument('--max_level', dest='max_level', default=None)
p_generate_toc.set_defaults(func=generate_toc_argparse)
p_holdit = subparsers.add_parser('holdit')
p_holdit.add_argument('epubs', nargs='+', default=[])
p_holdit.set_defaults(func=holdit_argparse)
p_merge = subparsers.add_parser('merge')
p_merge.add_argument('epubs', nargs='+', default=[])
p_merge.add_argument('--output', dest='output', default=None, required=True)
p_merge.add_argument('--headerfile', dest='headerfile', action='store_true')
p_merge.add_argument('-y', '--autoyes', dest='autoyes', action='store_true')
p_merge.set_defaults(func=merge_argparse)
p_normalize = subparsers.add_parser('normalize')
p_normalize.add_argument('epubs', nargs='+', default=[])
p_normalize.set_defaults(func=normalize_argparse)
args = parser.parse_args(argv)
args.func(args)
if __name__ == '__main__':
raise SystemExit(main(sys.argv[1:]))