# -*- coding: utf-8 -*- # # This file is part of Librarian, licensed under GNU Affero GPLv3 or later. # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # from librarian import ValidationError, NoDublinCore, ParseError, NoProvider from librarian import RDFNS from librarian.cover import make_cover from librarian import dcparser from xml.parsers.expat import ExpatError from lxml import etree from lxml.etree import XMLSyntaxError, XSLTApplyError import os import re from StringIO import StringIO class WLDocument(object): LINE_SWAP_EXPR = re.compile(r'/\s', re.MULTILINE | re.UNICODE) provider = None def __init__(self, edoc, parse_dublincore=True, provider=None, strict=False, meta_fallbacks=None): self.edoc = edoc self.provider = provider root_elem = edoc.getroot() dc_path = './/' + RDFNS('RDF') if root_elem.tag != 'utwor': raise ValidationError("Invalid root element. Found '%s', should be 'utwor'" % root_elem.tag) if parse_dublincore: self.rdf_elem = root_elem.find(dc_path) if self.rdf_elem is None: raise NoDublinCore('Document has no DublinCore - which is required.') self.book_info = dcparser.BookInfo.from_element( self.rdf_elem, fallbacks=meta_fallbacks, strict=strict) else: self.book_info = None @classmethod def from_string(cls, xml, *args, **kwargs): return cls.from_file(StringIO(xml), *args, **kwargs) @classmethod def from_file(cls, xmlfile, *args, **kwargs): # first, prepare for parsing if isinstance(xmlfile, basestring): file = open(xmlfile, 'rb') try: data = file.read() finally: file.close() else: data = xmlfile.read() if not isinstance(data, unicode): data = data.decode('utf-8') data = data.replace(u'\ufeff', '') try: parser = etree.XMLParser(remove_blank_text=False) tree = etree.parse(StringIO(data.encode('utf-8')), parser) return cls(tree, *args, **kwargs) except (ExpatError, XMLSyntaxError, XSLTApplyError), e: raise ParseError(e) def swap_endlines(self): """Converts line breaks in stanzas into
tags.""" # only swap inside stanzas for elem in self.edoc.iter('strofa'): for child in list(elem): if child.tail: chunks = self.LINE_SWAP_EXPR.split(child.tail) ins_index = elem.index(child) + 1 while len(chunks) > 1: ins = etree.Element('br') ins.tail = chunks.pop() elem.insert(ins_index, ins) child.tail = chunks.pop(0) if elem.text: chunks = self.LINE_SWAP_EXPR.split(elem.text) while len(chunks) > 1: ins = etree.Element('br') ins.tail = chunks.pop() elem.insert(0, ins) elem.text = chunks.pop(0) def parts(self): if self.provider is None: raise NoProvider('No document provider supplied.') if self.book_info is None: raise NoDublinCore('No Dublin Core in document.') for part_uri in self.book_info.parts: yield self.from_file(self.provider.by_uri(part_uri), provider=self.provider) def chunk(self, path): # convert the path to XPath expr = self.path_to_xpath(path) elems = self.edoc.xpath(expr) if len(elems) == 0: return None else: return elems[0] def path_to_xpath(self, path): parts = [] for part in path.split('/'): match = re.match(r'([^\[]+)\[(\d+)\]', part) if not match: parts.append(part) else: tag, n = match.groups() parts.append("*[%d][name() = '%s']" % (int(n)+1, tag)) if parts[0] == '.': parts[0] = '' return '/'.join(parts) def transform(self, stylesheet, **options): return self.edoc.xslt(stylesheet, **options) def update_dc(self): if self.book_info: parent = self.rdf_elem.getparent() parent.replace(self.rdf_elem, self.book_info.to_etree(parent)) def serialize(self): self.update_dc() return etree.tostring(self.edoc, encoding=unicode, pretty_print=True) def merge_chunks(self, chunk_dict): unmerged = [] for key, data in chunk_dict.iteritems(): try: xpath = self.path_to_xpath(key) node = self.edoc.xpath(xpath)[0] repl = etree.fromstring(u"<%s>%s" % (node.tag, data, node.tag)) node.getparent().replace(node, repl) except Exception, e: unmerged.append(repr((key, xpath, e))) return unmerged def clean_ed_note(self, note_tag='nota_red'): """ deletes forbidden tags from nota_red """ for node in self.edoc.xpath('|'.join('//%s//%s' % (note_tag, tag) for tag in ('pa', 'pe', 'pr', 'pt', 'begin', 'end', 'motyw'))): tail = node.tail node.clear() node.tag = 'span' node.tail = tail def editors(self): """Returns a set of all editors for book and its children. :returns: set of dcparser.Person objects """ if self.book_info is None: raise NoDublinCore('No Dublin Core in document.') persons = set(self.book_info.editors + self.book_info.technical_editors) for child in self.parts(): persons.update(child.editors()) if None in persons: persons.remove(None) return persons # Converters def as_html(self, *args, **kwargs): from librarian import html return html.transform(self, *args, **kwargs) def as_text(self, *args, **kwargs): from librarian import text return text.transform(self, *args, **kwargs) def as_epub(self, *args, **kwargs): from librarian import epub return epub.transform(self, *args, **kwargs) def as_pdf(self, *args, **kwargs): from librarian import pdf return pdf.transform(self, *args, **kwargs) def as_mobi(self, *args, **kwargs): from librarian import mobi return mobi.transform(self, *args, **kwargs) def as_fb2(self, *args, **kwargs): from librarian import fb2 return fb2.transform(self, *args, **kwargs) def as_cover(self, cover_class=None, *args, **kwargs): if cover_class is None: cover_class = make_cover return cover_class(self.book_info, *args, **kwargs).output_file() # for debugging only def latex_dir(self, *args, **kwargs): kwargs['latex_dir'] = True from librarian import pdf return pdf.transform(self, *args, **kwargs) def save_output_file(self, output_file, output_path=None, output_dir_path=None, make_author_dir=False, ext=None): if output_dir_path: save_path = output_dir_path if make_author_dir: save_path = os.path.join(save_path, unicode(self.book_info.author).encode('utf-8')) save_path = os.path.join(save_path, self.book_info.url.slug) if ext: save_path += '.%s' % ext else: save_path = output_path output_file.save_as(save_path)