X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/07fdba2c7fe8e11b6867712d47bdd608e88c29fb..acce82fe7f7b293328d241588e03b4b3b7171822:/librarian/html.py?ds=inline diff --git a/librarian/html.py b/librarian/html.py index b279e5d..92fc134 100644 --- a/librarian/html.py +++ b/librarian/html.py @@ -1,12 +1,18 @@ # -*- 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. +# import os import cStringIO import re import copy -import pkgutil from lxml import etree +from librarian.parser import WLDocument +from librarian import XHTMLNS, ParseError +from lxml.etree import XMLSyntaxError, XSLTApplyError ENTITY_SUBSTITUTIONS = [ (u'---', u'—'), @@ -16,6 +22,14 @@ ENTITY_SUBSTITUTIONS = [ (u'"', u'”'), ] +STYLESHEETS = { + 'legacy': 'xslt/book2html.xslt', + 'full': 'xslt/wl2html_full.xslt', + 'partial': 'xslt/wl2html_partial.xslt' +} + +def get_stylesheet(name): + return os.path.join(os.path.dirname(__file__), STYLESHEETS[name]) def substitute_entities(context, text): """XPath extension function converting all entites in passed text.""" @@ -25,42 +39,54 @@ def substitute_entities(context, text): text = text.replace(entity, substitutution) return text - # Register substitute_entities function with lxml ns = etree.FunctionNamespace('http://wolnelektury.pl/functions') ns['substitute_entities'] = substitute_entities +def html_has_content(text): + return etree.ETXPath('//p|//{%(ns)s}p|//h1|//{%(ns)s}h1' % {'ns': str(XHTMLNS)})(text) -def transform(input_filename, output_filename): - """Transforms file input_filename in XML to output_filename in XHTML.""" - # Parse XSLT - style_filename = os.path.join(os.path.dirname(__file__), 'book2html.xslt') - style = etree.parse(style_filename) - - doc_file = cStringIO.StringIO() - expr = re.compile(r'/\s', re.MULTILINE | re.UNICODE); +def transform(input, output_filename=None, is_file=True, \ + parse_dublincore=True, stylesheet='legacy', options={}): + """Transforms file input_filename in XML to output_filename in XHTML. - f = open(input_filename, 'r') - for line in f: - line = line.decode('utf-8') - line = expr.sub(u'
\n', line) - doc_file.write(line.encode('utf-8')) - f.close() + If output_filename is None, returns an XML, + otherwise returns True if file has been written,False if it hasn't. + File won't be written if it has no content. + """ + # Parse XSLT + try: + style_filename = get_stylesheet(stylesheet) + style = etree.parse(style_filename) - doc_file.seek(0); + if is_file: + document = WLDocument.from_file(input, True, \ + parse_dublincore=parse_dublincore) + else: + document = WLDocument.from_string(input, True, \ + parse_dublincore=parse_dublincore) - parser = etree.XMLParser(remove_blank_text=True) - doc = etree.parse(doc_file, parser) + result = document.transform(style, **options) + del document # no longer needed large object :) - result = doc.xslt(style) - if result.find('//p') is not None: - add_anchors(result.getroot()) - add_table_of_contents(result.getroot()) - result.write(output_filename, xml_declaration=False, pretty_print=True, encoding='utf-8') - return True - else: - return False + if html_has_content(result): + add_anchors(result.getroot()) + add_table_of_contents(result.getroot()) + if output_filename is not None: + result.write(output_filename, xml_declaration=False, pretty_print=True, encoding='utf-8') + else: + return result + return True + else: + if output_filename is not None: + return False + else: + return "" + except KeyError: + raise ValueError("'%s' is not a valid stylesheet.") + except (XMLSyntaxError, XSLTApplyError), e: + raise ParseError(e) class Fragment(object): def __init__(self, id, themes): @@ -173,7 +199,7 @@ def add_anchor(element, prefix, with_link=True, with_target=True, link_text=None anchor.tail = element.text element.text = u'' element.insert(0, anchor) - + if with_target: anchor_target = etree.Element('a', name='%s' % prefix) anchor_target.set('class', 'target') @@ -197,7 +223,7 @@ def add_anchors(root): if any_ancestor(element, lambda e: e.get('class') in ('note', 'motto', 'motto_podpis', 'dedication') or e.tag == 'blockquote'): continue - + if element.tag == 'p' and 'verse' in element.get('class', ''): if counter == 1 or counter % 5 == 0: add_anchor(element, "f%d" % counter, link_text=counter) @@ -214,14 +240,14 @@ def add_table_of_contents(root): if element.tag in ('h2', 'h3'): if any_ancestor(element, lambda e: e.get('id') in ('footnotes',) or e.get('class') in ('person-list',)): continue - + if element.tag == 'h3' and len(sections) and sections[-1][1] == 'h2': sections[-1][3].append((counter, element.tag, ''.join(element.xpath('text()')), [])) else: sections.append((counter, element.tag, ''.join(element.xpath('text()')), [])) add_anchor(element, "s%d" % counter, with_link=False) counter += 1 - + toc = etree.Element('div') toc.set('id', 'toc') toc_header = etree.SubElement(toc, 'h2') @@ -231,12 +257,12 @@ def add_table_of_contents(root): for n, section, text, subsections in sections: section_element = etree.SubElement(toc_list, 'li') add_anchor(section_element, "s%d" % n, with_target=False, link_text=text) - + if len(subsections): subsection_list = etree.SubElement(section_element, 'ol') for n, subsection, text, _ in subsections: subsection_element = etree.SubElement(subsection_list, 'li') add_anchor(subsection_element, "s%d" % n, with_target=False, link_text=text) - + root.insert(0, toc)