# This file is part of EbookLib.
# Copyright (c) 2013 Aleksandar Erkalovic <aerkalov@gmail.com>
#
# EbookLib is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# EbookLib is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with EbookLib. If not, see <http://www.gnu.org/licenses/>.
from ebooklib.plugins.base import BasePlugin
from ebooklib.utils import parse_html_string
[docs]class SourceHighlighter(BasePlugin):
def __init__(self):
pass
[docs] def html_before_write(self, book, chapter):
from lxml import etree, html
from pygments import highlight
from pygments.formatters import HtmlFormatter
from ebooklib import epub
try:
tree = parse_html_string(chapter.content)
except:
return
root = tree.getroottree()
had_source = False
if len(root.find('body')) != 0:
body = tree.find('body')
# check for embeded source
for source in body.xpath('//pre[contains(@class,"source-")]'):
css_class = source.get('class')
source_text = (source.text or '') + ''.join([html.tostring(child) for child in source.iterchildren()])
if 'source-python' in css_class:
from pygments.lexers import PythonLexer
# _text = highlight(source_text, PythonLexer(), HtmlFormatter(linenos="inline"))
_text = highlight(source_text, PythonLexer(), HtmlFormatter())
if 'source-css' in css_class:
from pygments.lexers import CssLexer
_text = highlight(source_text, CssLexer(), HtmlFormatter())
_parent = source.getparent()
_parent.replace(source, etree.XML(_text))
had_source = True
if had_source:
chapter.add_link(href="style/code.css", rel="stylesheet", type="text/css")
chapter.content = etree.tostring(tree, pretty_print=True, encoding='utf-8')