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sphinx/sphinx/builders/epub.py
Roland Meister b2a237b8b4 Omit nodes without refuri attribute from toc.ncx. 
This fixes bug report on sphinx-dev.
2010-06-30 21:32:18 +02:00

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# -*- coding: utf-8 -*-
"""
sphinx.builders.epub
~~~~~~~~~~~~~~~~~~~~
Build epub files.
Originally derived from qthelp.py.
:copyright: Copyright 2007-2010 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import os
import codecs
from os import path
import zipfile
from docutils import nodes
from docutils.transforms import Transform
from sphinx.builders.html import StandaloneHTMLBuilder
from sphinx.util.osutil import EEXIST
from sphinx.util.smartypants import sphinx_smarty_pants as ssp
# (Fragment) templates from which the metainfo files content.opf, toc.ncx,
# mimetype, and META-INF/container.xml are created.
# This template section also defines strings that are embedded in the html
# output but that may be customized by (re-)setting module attributes,
# e.g. from conf.py.
_mimetype_template = 'application/epub+zip' # no EOL!
_container_template = u'''\
<?xml version="1.0" encoding="UTF-8"?>
<container version="1.0"
xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
<rootfiles>
<rootfile full-path="content.opf"
media-type="application/oebps-package+xml"/>
</rootfiles>
</container>
'''
_toc_template = u'''\
<?xml version="1.0"?>
<ncx version="2005-1" xmlns="http://www.daisy.org/z3986/2005/ncx/">
<head>
<meta name="dtb:uid" content="%(uid)s"/>
<meta name="dtb:depth" content="%(level)d"/>
<meta name="dtb:totalPageCount" content="0"/>
<meta name="dtb:maxPageNumber" content="0"/>
</head>
<docTitle>
<text>%(title)s</text>
</docTitle>
<navMap>
%(navpoints)s
</navMap>
</ncx>
'''
_navpoint_template = u'''\
%(indent)s <navPoint id="%(navpoint)s" playOrder="%(playorder)d">
%(indent)s <navLabel>
%(indent)s <text>%(text)s</text>
%(indent)s </navLabel>
%(indent)s <content src="%(refuri)s" />
%(indent)s </navPoint>'''
_navpoint_indent = ' '
_navPoint_template = 'navPoint%d'
_content_template = u'''\
<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" version="2.0"
unique-identifier="%(uid)s">
<metadata xmlns:opf="http://www.idpf.org/2007/opf"
xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:language>%(lang)s</dc:language>
<dc:title>%(title)s</dc:title>
<dc:creator opf:role="aut">%(author)s</dc:creator>
<dc:publisher>%(publisher)s</dc:publisher>
<dc:rights>%(copyright)s</dc:rights>
<dc:identifier id="%(uid)s" opf:scheme="%(scheme)s">%(id)s</dc:identifier>
</metadata>
<manifest>
<item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml" />
%(files)s
</manifest>
<spine toc="ncx">
%(spine)s
</spine>
</package>
'''
_file_template = u'''\
<item id="%(id)s"
href="%(href)s"
media-type="%(media_type)s" />'''
_spine_template = u'''\
<itemref idref="%(idref)s" />'''
_toctree_template = u'toctree-l%d'
_link_target_template = u' [%(uri)s]'
_css_link_target_class = u'link-target'
_media_types = {
'.html': 'application/xhtml+xml',
'.css': 'text/css',
'.png': 'image/png',
'.gif': 'image/gif',
'.svg': 'image/svg+xml',
'.jpg': 'image/jpeg',
'.jpeg': 'image/jpeg',
'.otf': 'application/x-font-otf',
'.ttf': 'application/x-font-ttf',
}
# The transform to show link targets
class VisibleLinksTransform(Transform):
"""
Add the link target of references to the text, unless it is already
present in the description.
"""
# This transform must run after the references transforms
default_priority = 680
def apply(self):
for ref in self.document.traverse(nodes.reference):
uri = ref.get('refuri', '')
if ( uri.startswith('http:') or uri.startswith('https:') or \
uri.startswith('ftp:') ) and uri not in ref.astext():
uri = _link_target_template % {'uri': uri}
if uri:
idx = ref.parent.index(ref) + 1
link = nodes.inline(uri, uri)
link['classes'].append(_css_link_target_class)
ref.parent.insert(idx, link)
# The epub publisher
class EpubBuilder(StandaloneHTMLBuilder):
"""Builder that outputs epub files.
It creates the metainfo files container.opf, toc.ncx, mimetype, and
META-INF/container.xml. Afterwards, all necessary files are zipped to an
epub file.
"""
name = 'epub'
# don't copy the reST source
copysource = False
supported_image_types = ['image/svg+xml', 'image/png', 'image/gif',
'image/jpeg']
# don't add links
add_permalinks = False
# don't add sidebar etc.
embedded = True
def init(self):
StandaloneHTMLBuilder.init(self)
# the output files for epub must be .html only
self.out_suffix = '.html'
self.playorder = 0
# Disable transform until the issue with cached doctrees is solved.
# Building the html file after the epub file shows the
# visible links also in the HTML output.
#self.app.add_transform(VisibleLinksTransform)
def get_theme_config(self):
return self.config.epub_theme, {}
# generic support functions
def make_id(self, name):
"""Replace all characters not allowed for (X)HTML ids."""
return name.replace('/', '_').replace(' ', '')
def esc(self, name):
"""Replace all characters not allowed in text an attribute values."""
# Like cgi.escape, but also replace apostrophe
name = name.replace('&', '&amp;')
name = name.replace('<', '&lt;')
name = name.replace('>', '&gt;')
name = name.replace('"', '&quot;')
name = name.replace('\'', '&apos;')
return name
def get_refnodes(self, doctree, result):
"""Collect section titles, their depth in the toc and the refuri."""
# XXX: is there a better way than checking the attribute
# toctree-l[1-8] on the parent node?
if isinstance(doctree, nodes.reference) and hasattr(doctree, 'refuri'):
refuri = doctree['refuri']
if refuri.startswith('http://') or refuri.startswith('https://') \
or refuri.startswith('irc:') or refuri.startswith('mailto:'):
return result
classes = doctree.parent.attributes['classes']
for level in range(8, 0, -1): # or range(1, 8)?
if (_toctree_template % level) in classes:
result.append({
'level': level,
'refuri': self.esc(refuri),
'text': ssp(self.esc(doctree.astext()))
})
break
else:
for elem in doctree.children:
result = self.get_refnodes(elem, result)
return result
def get_toc(self):
"""Get the total table of contents, containg the master_doc
and pre and post files not managed by sphinx.
"""
doctree = self.env.get_and_resolve_doctree(self.config.master_doc,
self, prune_toctrees=False)
self.refnodes = self.get_refnodes(doctree, [])
self.refnodes.insert(0, {
'level': 1,
'refuri': self.esc(self.config.master_doc + '.html'),
'text': ssp(self.esc(
self.env.titles[self.config.master_doc].astext()))
})
for file, text in reversed(self.config.epub_pre_files):
self.refnodes.insert(0, {
'level': 1,
'refuri': self.esc(file),
'text': ssp(self.esc(text))
})
for file, text in self.config.epub_post_files:
self.refnodes.append({
'level': 1,
'refuri': self.esc(file),
'text': ssp(self.esc(text))
})
# Finish by building the epub file
def handle_finish(self):
"""Create the metainfo files and finally the epub."""
self.get_toc()
self.build_mimetype(self.outdir, 'mimetype')
self.build_container(self.outdir, 'META-INF/container.xml')
self.build_content(self.outdir, 'content.opf')
self.build_toc(self.outdir, 'toc.ncx')
self.build_epub(self.outdir, self.config.epub_basename + '.epub')
def build_mimetype(self, outdir, outname):
"""Write the metainfo file mimetype."""
self.info('writing %s file...' % outname)
f = codecs.open(path.join(outdir, outname), 'w', 'utf-8')
try:
f.write(_mimetype_template)
finally:
f.close()
def build_container(self, outdir, outname):
"""Write the metainfo file META-INF/cointainer.xml."""
self.info('writing %s file...' % outname)
fn = path.join(outdir, outname)
try:
os.mkdir(path.dirname(fn))
except OSError, err:
if err.errno != EEXIST:
raise
f = codecs.open(path.join(outdir, outname), 'w', 'utf-8')
try:
f.write(_container_template)
finally:
f.close()
def content_metadata(self, files, spine):
"""Create a dictionary with all metadata for the content.opf
file properly escaped.
"""
metadata = {}
metadata['title'] = self.esc(self.config.epub_title)
metadata['author'] = self.esc(self.config.epub_author)
metadata['uid'] = self.esc(self.config.epub_uid)
metadata['lang'] = self.esc(self.config.epub_language)
metadata['publisher'] = self.esc(self.config.epub_publisher)
metadata['copyright'] = self.esc(self.config.epub_copyright)
metadata['scheme'] = self.esc(self.config.epub_scheme)
metadata['id'] = self.esc(self.config.epub_identifier)
metadata['files'] = files
metadata['spine'] = spine
return metadata
def build_content(self, outdir, outname):
"""Write the metainfo file content.opf It contains bibliographic data,
a file list and the spine (the reading order).
"""
self.info('writing %s file...' % outname)
# files
if not outdir.endswith(os.sep):
outdir += os.sep
olen = len(outdir)
projectfiles = []
self.files = []
self.ignored_files = ['.buildinfo',
'mimetype', 'content.opf', 'toc.ncx', 'META-INF/container.xml',
self.config.epub_basename + '.epub'] + \
self.config.epub_exclude_files
for root, dirs, files in os.walk(outdir):
for fn in files:
filename = path.join(root, fn)[olen:]
if filename in self.ignored_files:
continue
ext = path.splitext(filename)[-1]
if ext not in _media_types:
self.warn('unknown mimetype for %s, ignoring' % filename)
continue
projectfiles.append(_file_template % {
'href': self.esc(filename),
'id': self.esc(self.make_id(filename)),
'media_type': self.esc(_media_types[ext])
})
self.files.append(filename)
projectfiles = '\n'.join(projectfiles)
# spine
spine = []
for item in self.refnodes:
if '#' in item['refuri']:
continue
if item['refuri'] in self.ignored_files:
continue
spine.append(_spine_template % {
'idref': self.esc(self.make_id(item['refuri']))
})
spine = '\n'.join(spine)
# write the project file
f = codecs.open(path.join(outdir, outname), 'w', 'utf-8')
try:
f.write(_content_template % \
self.content_metadata(projectfiles, spine))
finally:
f.close()
def new_navpoint(self, node, level, incr=True):
"""Create a new entry in the toc from the node at given level."""
# XXX Modifies the node
if incr:
self.playorder += 1
node['indent'] = _navpoint_indent * level
node['navpoint'] = self.esc(_navPoint_template % self.playorder)
node['playorder'] = self.playorder
return _navpoint_template % node
def insert_subnav(self, node, subnav):
"""Insert nested navpoints for given node.
The node and subnav are already rendered to text.
"""
nlist = node.rsplit('\n', 1)
nlist.insert(-1, subnav)
return '\n'.join(nlist)
def build_navpoints(self, nodes):
"""Create the toc navigation structure.
Subelements of a node are nested inside the navpoint.
For nested nodes the parent node is reinserted in the subnav.
"""
navstack = []
navlist = []
level = 1
lastnode = None
for node in nodes:
file = node['refuri'].split('#')[0]
if file in self.ignored_files:
continue
if node['level'] > self.config.epub_tocdepth:
continue
if node['level'] == level:
navlist.append(self.new_navpoint(node, level))
elif node['level'] == level + 1:
navstack.append(navlist)
navlist = []
level += 1
if lastnode:
# Insert starting point in subtoc with same playOrder
navlist.append(self.new_navpoint(lastnode, level, False))
navlist.append(self.new_navpoint(node, level))
else:
while node['level'] < level:
subnav = '\n'.join(navlist)
navlist = navstack.pop()
navlist[-1] = self.insert_subnav(navlist[-1], subnav)
level -= 1
navlist.append(self.new_navpoint(node, level))
lastnode = node
while level != 1:
subnav = '\n'.join(navlist)
navlist = navstack.pop()
navlist[-1] = self.insert_subnav(navlist[-1], subnav)
level -= 1
return '\n'.join(navlist)
def toc_metadata(self, level, navpoints):
"""Create a dictionary with all metadata for the toc.ncx
file properly escaped.
"""
metadata = {}
metadata['uid'] = self.config.epub_uid
metadata['title'] = self.config.epub_title
metadata['level'] = level
metadata['navpoints'] = navpoints
return metadata
def build_toc(self, outdir, outname):
"""Write the metainfo file toc.ncx."""
self.info('writing %s file...' % outname)
navpoints = self.build_navpoints(self.refnodes)
level = max(item['level'] for item in self.refnodes)
level = min(level, self.config.epub_tocdepth)
f = codecs.open(path.join(outdir, outname), 'w', 'utf-8')
try:
f.write(_toc_template % self.toc_metadata(level, navpoints))
finally:
f.close()
def build_epub(self, outdir, outname):
"""Write the epub file.
It is a zip file with the mimetype file stored uncompressed
as the first entry.
"""
self.info('writing %s file...' % outname)
projectfiles = ['META-INF/container.xml', 'content.opf', 'toc.ncx'] \
+ self.files
epub = zipfile.ZipFile(path.join(outdir, outname), 'w', \
zipfile.ZIP_DEFLATED)
epub.write(path.join(outdir, 'mimetype'), 'mimetype', \
zipfile.ZIP_STORED)
for file in projectfiles:
epub.write(path.join(outdir, file), file, zipfile.ZIP_DEFLATED)
epub.close()
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