Actually add HTML TOC generation.

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Marshall T. Vandegrift 2009-01-09 10:21:59 -05:00
parent dd613b5fa4
commit 66b401ea93

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'''
HTML-TOC-adding transform.
'''
from __future__ import with_statement
__license__ = 'GPL v3'
__copyright__ = '2008, Marshall T. Vandegrift <llasram@gmail.com>'
import sys
import os
from lxml import etree
from calibre.ebooks.oeb.base import XML, XHTML, XHTML_NS
from calibre.ebooks.oeb.base import XHTML_MIME, CSS_MIME
from calibre.ebooks.oeb.base import element
STYLE_CSS = {
'nested': """
.calibre_toc_header {
text-align: center;
}
.calibre_toc_block {
margin-left: 1.2em;
text-indent: -1.2em;
}
.calibre_toc_block .calibre_toc_block {
margin-left: 2.4em;
}
.calibre_toc_block .calibre_toc_block .calibre_toc_block {
margin-left: 3.6em;
}
""",
'centered': """
.calibre_toc_header {
text-align: center;
}
.calibre_toc_block {
text-align: center;
}
body > .calibre_toc_block {
margin-top: 1.2em;
}
"""
}
class HTMLTOCAdder(object):
def __init__(self, style='nested'):
self.style = style
def transform(self, oeb, context):
if 'toc' in oeb.guide:
return
oeb.logger.info('Generating in-line TOC...')
style = self.style
if style not in STYLE_CSS:
oeb.logger.error('Unknown TOC style %r' % style)
style = 'nested'
id, css_href = oeb.manifest.generate('tocstyle', 'tocstyle.css')
oeb.manifest.add(id, css_href, CSS_MIME, data=STYLE_CSS[style])
language = str(oeb.metadata.language[0])
contents = element(None, XHTML('html'), nsmap={None: XHTML_NS},
attrib={XML('lang'): language})
head = element(contents, XHTML('head'))
title = element(head, XHTML('title'))
title.text = 'Table of Contents'
element(head, XHTML('link'), rel='stylesheet', type=CSS_MIME,
href=css_href)
body = element(contents, XHTML('body'),
attrib={'class': 'calibre_toc'})
h1 = element(body, XHTML('h1'),
attrib={'class': 'calibre_toc_header'})
h1.text = 'Table of Contents'
self.add_toc_level(body, oeb.toc)
id, href = oeb.manifest.generate('contents', 'contents.xhtml')
item = oeb.manifest.add(id, href, XHTML_MIME, data=contents)
oeb.spine.add(item, linear=False)
oeb.guide.add('toc', 'Table of Contents', href)
def add_toc_level(self, elem, toc):
for node in toc:
block = element(elem, XHTML('div'),
attrib={'class': 'calibre_toc_block'})
line = element(elem, XHTML('a'),
attrib={'href': node.href,
'class': 'calibre_toc_line'})
line.text = node.title
self.add_toc_level(block, node)