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gryf
2020-03-31 17:15:23 +02:00
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ebook_converter/ebooks/conversion/plugins/html_output.py Normal file
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from __future__ import absolute_import, division, print_function, unicode_literals
__license__ = 'GPL 3'
__copyright__ = '2010, Fabian Grassl <fg@jusmeum.de>'
__docformat__ = 'restructuredtext en'
import os, re, shutil
from os.path import dirname, abspath, relpath as _relpath, exists, basename
from calibre.customize.conversion import OutputFormatPlugin, OptionRecommendation
from calibre import CurrentDir
from calibre.ptempfile import PersistentTemporaryDirectory
from polyglot.builtins import unicode_type
def relpath(*args):
return _relpath(*args).replace(os.sep, '/')
class HTMLOutput(OutputFormatPlugin):
name = 'HTML Output'
author = 'Fabian Grassl'
file_type = 'zip'
commit_name = 'html_output'
options = {
OptionRecommendation(name='template_css',
help=_('CSS file used for the output instead of the default file')),
OptionRecommendation(name='template_html_index',
help=_('Template used for generation of the HTML index file instead of the default file')),
OptionRecommendation(name='template_html',
help=_('Template used for the generation of the HTML contents of the book instead of the default file')),
OptionRecommendation(name='extract_to',
help=_('Extract the contents of the generated ZIP file to the '
'specified directory. WARNING: The contents of the directory '
'will be deleted.')
),
}
recommendations = {('pretty_print', True, OptionRecommendation.HIGH)}
def generate_toc(self, oeb_book, ref_url, output_dir):
'''
Generate table of contents
'''
from lxml import etree
from polyglot.urllib import unquote
from calibre.ebooks.oeb.base import element
from calibre.utils.cleantext import clean_xml_chars
with CurrentDir(output_dir):
def build_node(current_node, parent=None):
if parent is None:
parent = etree.Element('ul')
elif len(current_node.nodes):
parent = element(parent, ('ul'))
for node in current_node.nodes:
point = element(parent, 'li')
href = relpath(abspath(unquote(node.href)), dirname(ref_url))
if isinstance(href, bytes):
href = href.decode('utf-8')
link = element(point, 'a', href=clean_xml_chars(href))
title = node.title
if isinstance(title, bytes):
title = title.decode('utf-8')
if title:
title = re.sub(r'\s+', ' ', title)
link.text = clean_xml_chars(title)
build_node(node, point)
return parent
wrap = etree.Element('div')
wrap.append(build_node(oeb_book.toc))
return wrap
def generate_html_toc(self, oeb_book, ref_url, output_dir):
from lxml import etree
root = self.generate_toc(oeb_book, ref_url, output_dir)
return etree.tostring(root, pretty_print=True, encoding='unicode',
xml_declaration=False)
def convert(self, oeb_book, output_path, input_plugin, opts, log):
from lxml import etree
from calibre.utils import zipfile
from templite import Templite
from polyglot.urllib import unquote
from calibre.ebooks.html.meta import EasyMeta
# read template files
if opts.template_html_index is not None:
with open(opts.template_html_index, 'rb') as f:
template_html_index_data = f.read()
else:
template_html_index_data = P('templates/html_export_default_index.tmpl', data=True)
if opts.template_html is not None:
with open(opts.template_html, 'rb') as f:
template_html_data = f.read()
else:
template_html_data = P('templates/html_export_default.tmpl', data=True)
if opts.template_css is not None:
with open(opts.template_css, 'rb') as f:
template_css_data = f.read()
else:
template_css_data = P('templates/html_export_default.css', data=True)
template_html_index_data = template_html_index_data.decode('utf-8')
template_html_data = template_html_data.decode('utf-8')
template_css_data = template_css_data.decode('utf-8')
self.log = log
self.opts = opts
meta = EasyMeta(oeb_book.metadata)
tempdir = os.path.realpath(PersistentTemporaryDirectory())
output_file = os.path.join(tempdir,
basename(re.sub(r'\.zip', '', output_path)+'.html'))
output_dir = re.sub(r'\.html', '', output_file)+'_files'
if not exists(output_dir):
os.makedirs(output_dir)
css_path = output_dir+os.sep+'calibreHtmlOutBasicCss.css'
with open(css_path, 'wb') as f:
f.write(template_css_data.encode('utf-8'))
with open(output_file, 'wb') as f:
html_toc = self.generate_html_toc(oeb_book, output_file, output_dir)
templite = Templite(template_html_index_data)
nextLink = oeb_book.spine[0].href
nextLink = relpath(output_dir+os.sep+nextLink, dirname(output_file))
cssLink = relpath(abspath(css_path), dirname(output_file))
tocUrl = relpath(output_file, dirname(output_file))
t = templite.render(has_toc=bool(oeb_book.toc.count()),
toc=html_toc, meta=meta, nextLink=nextLink,
tocUrl=tocUrl, cssLink=cssLink,
firstContentPageLink=nextLink)
if isinstance(t, unicode_type):
t = t.encode('utf-8')
f.write(t)
with CurrentDir(output_dir):
for item in oeb_book.manifest:
path = abspath(unquote(item.href))
dir = dirname(path)
if not exists(dir):
os.makedirs(dir)
if item.spine_position is not None:
with open(path, 'wb') as f:
pass
else:
with open(path, 'wb') as f:
f.write(item.bytes_representation)
item.unload_data_from_memory(memory=path)
for item in oeb_book.spine:
path = abspath(unquote(item.href))
dir = dirname(path)
root = item.data.getroottree()
# get & clean HTML <HEAD>-data
head = root.xpath('//h:head', namespaces={'h': 'http://www.w3.org/1999/xhtml'})[0]
head_content = etree.tostring(head, pretty_print=True, encoding='unicode')
head_content = re.sub(r'\<\/?head.*\>', '', head_content)
head_content = re.sub(re.compile(r'\<style.*\/style\>', re.M|re.S), '', head_content)
head_content = re.sub(r'<(title)([^>]*)/>', r'<\1\2></\1>', head_content)
# get & clean HTML <BODY>-data
body = root.xpath('//h:body', namespaces={'h': 'http://www.w3.org/1999/xhtml'})[0]
ebook_content = etree.tostring(body, pretty_print=True, encoding='unicode')
ebook_content = re.sub(r'\<\/?body.*\>', '', ebook_content)
ebook_content = re.sub(r'<(div|a|span)([^>]*)/>', r'<\1\2></\1>', ebook_content)
# generate link to next page
if item.spine_position+1 < len(oeb_book.spine):
nextLink = oeb_book.spine[item.spine_position+1].href
nextLink = relpath(abspath(nextLink), dir)
else:
nextLink = None
# generate link to previous page
if item.spine_position > 0:
prevLink = oeb_book.spine[item.spine_position-1].href
prevLink = relpath(abspath(prevLink), dir)
else:
prevLink = None
cssLink = relpath(abspath(css_path), dir)
tocUrl = relpath(output_file, dir)
firstContentPageLink = oeb_book.spine[0].href
# render template
templite = Templite(template_html_data)
toc = lambda: self.generate_html_toc(oeb_book, path, output_dir)
t = templite.render(ebookContent=ebook_content,
prevLink=prevLink, nextLink=nextLink,
has_toc=bool(oeb_book.toc.count()), toc=toc,
tocUrl=tocUrl, head_content=head_content,
meta=meta, cssLink=cssLink,
firstContentPageLink=firstContentPageLink)
# write html to file
with open(path, 'wb') as f:
f.write(t.encode('utf-8'))
item.unload_data_from_memory(memory=path)
zfile = zipfile.ZipFile(output_path, "w")
zfile.add_dir(output_dir, basename(output_dir))
zfile.write(output_file, basename(output_file), zipfile.ZIP_DEFLATED)
if opts.extract_to:
if os.path.exists(opts.extract_to):
shutil.rmtree(opts.extract_to)
os.makedirs(opts.extract_to)
zfile.extractall(opts.extract_to)
self.log('Zip file extracted to', opts.extract_to)
zfile.close()
# cleanup temp dir
shutil.rmtree(tempdir)