X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/143b2e4e4ebbcc4e3de1b23f56df933317b269ff..bd2ad2356d916f72762de867890b5d176830f73b:/librarian/epub.py diff --git a/librarian/epub.py b/librarian/epub.py index 92df2d4..5481516 100644 --- a/librarian/epub.py +++ b/librarian/epub.py @@ -1,47 +1,26 @@ # -*- 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. +# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # from __future__ import with_statement import os import os.path -import shutil -import sys +import subprocess +from StringIO import StringIO from copy import deepcopy from lxml import etree import zipfile +from tempfile import mkdtemp, NamedTemporaryFile +from shutil import rmtree -from librarian import XMLNamespace, RDFNS, DCNS, WLNS, XHTMLNS, NoDublinCore -from librarian.parser import WLDocument +from librarian import RDFNS, WLNS, NCXNS, OPFNS, XHTMLNS, OutputFile +from librarian.cover import WLCover -#TODO: shouldn't be repeated here -NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/") -OPFNS = XMLNamespace("http://www.idpf.org/2007/opf") +from librarian import functions, get_resource - -class DocProvider(object): - class DoesNotExist(Exception): - pass - - def by_slug(self, slug): - raise NotImplemented - - def __getitem__(self, slug): - return self.by_slug(slug) - - def by_uri(self, uri): - return self.by_slug(uri.rsplit('/', 1)[1]) - - -class DirDocProvider(DocProvider): - def __init__(self, dir): - self.dir = dir - self.files = {} - - def by_slug(self, slug): - return open(os.path.join(self.dir, '%s.xml' % slug)) +functions.reg_person_name() def inner_xml(node): @@ -52,7 +31,7 @@ def inner_xml(node): """ nt = node.text if node.text is not None else '' - return ''.join([nt] + [etree.tostring(child) for child in node]) + return ''.join([nt] + [etree.tostring(child) for child in node]) def set_inner_xml(node, text): """ sets node's text and children from a string @@ -63,7 +42,6 @@ def set_inner_xml(node, text): xyz """ - p = etree.fromstring('%s' % text) node.text = p.text node[:] = p[:] @@ -94,27 +72,24 @@ def xslt(xml, sheet): return xml.xslt(etree.parse(xsltf)) -_resdir = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'epub') -def res(fname): - return os.path.join(_resdir, fname) - - def replace_characters(node): def replace_chars(text): if text is None: return None - return text.replace("---", u"\u2014")\ + return text.replace(u"\ufeff", u"")\ + .replace("---", u"\u2014")\ .replace("--", u"\u2013")\ .replace(",,", u"\u201E")\ .replace('"', u"\u201D")\ .replace("'", u"\u2019") - if node.tag == 'extra': + if node.tag in ('uwaga', 'extra'): + t = node.tail node.clear() - else: - node.text = replace_chars(node.text) - node.tail = replace_chars(node.tail) - for child in node: - replace_characters(child) + node.tail = t + node.text = replace_chars(node.text) + node.tail = replace_chars(node.tail) + for child in node: + replace_characters(child) def find_annotations(annotations, source, part_no): @@ -130,7 +105,7 @@ def find_annotations(annotations, source, part_no): child.clear() child.tail = tail child.text = number - if child.tag not in ('extra', 'podtytul'): + if child.tag not in ('extra', 'uwaga'): find_annotations(annotations, child, part_no) @@ -181,19 +156,23 @@ def add_to_spine(spine, partno): class TOC(object): - def __init__(self, name=None, part_number=None): + def __init__(self, name=None, part_href=None): self.children = [] self.name = name - self.part_number = part_number + self.part_href = part_href self.sub_number = None - def add(self, name, part_number, level=0, is_part=True): + def add(self, name, part_href, level=0, is_part=True, index=None): + assert level == 0 or index is None if level > 0 and self.children: - return self.children[-1].add(name, part_number, level-1, is_part) + return self.children[-1].add(name, part_href, level-1, is_part) else: t = TOC(name) - t.part_number = part_number - self.children.append(t) + t.part_href = part_href + if index is not None: + self.children.insert(index, t) + else: + self.children.append(t) if not is_part: t.sub_number = len(self.children) + 1 return t.sub_number @@ -210,7 +189,13 @@ class TOC(object): else: return 0 - def write_to_xml(self, nav_map, counter): + def href(self): + src = self.part_href + if self.sub_number is not None: + src += '#sub%d' % self.sub_number + return src + + def write_to_xml(self, nav_map, counter=1): for child in self.children: nav_point = nav_map.makeelement(NCXNS('navPoint')) nav_point.set('id', 'NavPoint-%d' % counter) @@ -223,15 +208,34 @@ class TOC(object): nav_point.append(nav_label) content = nav_map.makeelement(NCXNS('content')) - src = 'part%d.html' % child.part_number - if child.sub_number is not None: - src += '#sub%d' % child.sub_number - content.set('src', src) + content.set('src', child.href()) nav_point.append(content) nav_map.append(nav_point) counter = child.write_to_xml(nav_point, counter + 1) return counter + def html_part(self, depth=0): + texts = [] + for child in self.children: + texts.append( + "
%s
" % + (depth, child.href(), child.name)) + texts.append(child.html_part(depth+1)) + return "\n".join(texts) + + def html(self): + with open(get_resource('epub/toc.html')) as f: + t = unicode(f.read(), 'utf-8') + return t % self.html_part() + + +def used_chars(element): + """ Lists characters used in an ETree Element """ + chars = set((element.text or '') + (element.tail or '')) + for child in element: + chars = chars.union(used_chars(child)) + return chars + def chop(main_text): """ divide main content of the XML file into chunks """ @@ -257,78 +261,119 @@ def chop(main_text): yield part_xml -def transform_chunk(chunk_xml, chunk_no, annotations): - """ transforms one chunk, returns a HTML string and a TOC object """ +def transform_chunk(chunk_xml, chunk_no, annotations, empty=False, _empty_html_static=[]): + """ transforms one chunk, returns a HTML string, a TOC object and a set of used characters """ toc = TOC() for element in chunk_xml[0]: if element.tag in ("naglowek_czesc", "naglowek_rozdzial", "naglowek_akt", "srodtytul"): - toc.add(node_name(element), chunk_no) + toc.add(node_name(element), "part%d.html" % chunk_no) elif element.tag in ('naglowek_podrozdzial', 'naglowek_scena'): - subnumber = toc.add(node_name(element), chunk_no, level=1, is_part=False) + subnumber = toc.add(node_name(element), "part%d.html" % chunk_no, level=1, is_part=False) element.set('sub', str(subnumber)) - find_annotations(annotations, chunk_xml, chunk_no) - replace_by_verse(chunk_xml) - output_html = etree.tostring(xslt(chunk_xml, res('xsltScheme.xsl')), pretty_print=True) - return output_html, toc - - -def transform(provider, slug, output_file): - """ produces an epub - - provider is a DocProvider - output_file should be filelike object + if empty: + if not _empty_html_static: + _empty_html_static.append(open(get_resource('epub/emptyChunk.html')).read()) + chars = set() + output_html = _empty_html_static[0] + else: + find_annotations(annotations, chunk_xml, chunk_no) + replace_by_verse(chunk_xml) + html_tree = xslt(chunk_xml, get_resource('epub/xsltScheme.xsl')) + chars = used_chars(html_tree.getroot()) + output_html = etree.tostring(html_tree, method="html", pretty_print=True) + return output_html, toc, chars + + +def transform(wldoc, verbose=False, + style=None, html_toc=False, + sample=None, cover=None, flags=None): + """ produces a EPUB file + + sample=n: generate sample e-book (with at least n paragraphs) + cover: a cover.Cover object or True for default + flags: less-advertising, without-fonts, working-copy """ - def transform_file(input_xml, chunk_counter=1, first=True): + def transform_file(wldoc, chunk_counter=1, first=True, sample=None): """ processes one input file and proceeds to its children """ - children = [child.text for child in input_xml.findall('.//'+DCNS('relation.hasPart'))] + replace_characters(wldoc.edoc.getroot()) # every input file will have a TOC entry, # pointing to starting chunk - toc = TOC(node_name(input_xml.find('.//'+DCNS('title'))), chunk_counter) + toc = TOC(wldoc.book_info.title, "part%d.html" % chunk_counter) + chars = set() if first: # write book title page + html_tree = xslt(wldoc.edoc, get_resource('epub/xsltTitle.xsl')) + chars = used_chars(html_tree.getroot()) zip.writestr('OPS/title.html', - etree.tostring(xslt(input_xml, res('xsltTitle.xsl')), pretty_print=True)) - elif children: + etree.tostring(html_tree, method="html", pretty_print=True)) + # add a title page TOC entry + toc.add(u"Strona tytułowa", "title.html") + elif wldoc.book_info.parts: # write title page for every parent - zip.writestr('OPS/part%d.html' % chunk_counter, - etree.tostring(xslt(input_xml, res('xsltChunkTitle.xsl')), pretty_print=True)) + if sample is not None and sample <= 0: + chars = set() + html_string = open(get_resource('epub/emptyChunk.html')).read() + else: + html_tree = xslt(wldoc.edoc, get_resource('epub/xsltChunkTitle.xsl')) + chars = used_chars(html_tree.getroot()) + html_string = etree.tostring(html_tree, method="html", pretty_print=True) + zip.writestr('OPS/part%d.html' % chunk_counter, html_string) add_to_manifest(manifest, chunk_counter) add_to_spine(spine, chunk_counter) chunk_counter += 1 - if len(input_xml.getroot()) > 1: + if len(wldoc.edoc.getroot()) > 1: # rdf before style master - main_text = input_xml.getroot()[1] + main_text = wldoc.edoc.getroot()[1] else: # rdf in style master - main_text = input_xml.getroot()[0] + main_text = wldoc.edoc.getroot()[0] if main_text.tag == RDFNS('RDF'): main_text = None if main_text is not None: - replace_characters(main_text) + for chunk_xml in chop(main_text): + empty = False + if sample is not None: + if sample <= 0: + empty = True + else: + sample -= len(chunk_xml.xpath('//strofa|//akap|//akap_cd|//akap_dialog')) + chunk_html, chunk_toc, chunk_chars = transform_chunk(chunk_xml, chunk_counter, annotations, empty) - for chunk_no, chunk_xml in enumerate(chop(main_text), chunk_counter): - chunk_html, chunk_toc = transform_chunk(chunk_xml, chunk_counter, annotations) toc.extend(chunk_toc) + chars = chars.union(chunk_chars) zip.writestr('OPS/part%d.html' % chunk_counter, chunk_html) add_to_manifest(manifest, chunk_counter) add_to_spine(spine, chunk_counter) chunk_counter += 1 - if children: - for child in children: - child_xml = etree.parse(provider.by_uri(child)) - child_toc, chunk_counter = transform_file(child_xml, chunk_counter, first=False) - toc.append(child_toc) + for child in wldoc.parts(): + child_toc, chunk_counter, chunk_chars, sample = transform_file( + child, chunk_counter, first=False, sample=sample) + toc.append(child_toc) + chars = chars.union(chunk_chars) - return toc, chunk_counter + return toc, chunk_counter, chars, sample + document = deepcopy(wldoc) + del wldoc + + if flags: + for flag in flags: + document.edoc.getroot().set(flag, 'yes') + + opf = xslt(document.book_info.to_etree(), get_resource('epub/xsltContent.xsl')) + manifest = opf.find('.//' + OPFNS('manifest')) + guide = opf.find('.//' + OPFNS('guide')) + spine = opf.find('.//' + OPFNS('spine')) + + output_file = NamedTemporaryFile(prefix='librarian', suffix='.epub', delete=False) zip = zipfile.ZipFile(output_file, 'w', zipfile.ZIP_DEFLATED) # write static elements @@ -342,18 +387,41 @@ def transform(provider, slug, output_file): '' \ '') - for fname in 'style.css', 'logo_wolnelektury.png': - zip.write(res(fname), os.path.join('OPS', fname)) - - # metadata from first file - input_xml = etree.parse(provider[slug]) - metadata = input_xml.find('.//'+RDFNS('Description')) - if metadata is None: - raise NoDublinCore('Document has no DublinCore - which is required.') - metadata = etree.ElementTree(metadata) - opf = xslt(metadata, res('xsltContent.xsl')) - manifest = opf.find('.//' + OPFNS('manifest')) - spine = opf.find('.//' + OPFNS('spine')) + zip.write(get_resource('res/wl-logo-small.png'), os.path.join('OPS', 'logo_wolnelektury.png')) + zip.write(get_resource('res/jedenprocent.png'), os.path.join('OPS', 'jedenprocent.png')) + if not style: + style = get_resource('epub/style.css') + zip.write(style, os.path.join('OPS', 'style.css')) + + if cover: + if cover is True: + cover = WLCover + if cover.uses_dc_cover: + if document.book_info.cover_by: + document.edoc.getroot().set('data-cover-by', document.book_info.cover_by) + if document.book_info.cover_source: + document.edoc.getroot().set('data-cover-source', document.book_info.cover_source) + + cover_file = StringIO() + c = cover(document.book_info) + c.save(cover_file) + c_name = 'cover.%s' % c.ext() + zip.writestr(os.path.join('OPS', c_name), cover_file.getvalue()) + del cover_file + + cover_tree = etree.parse(get_resource('epub/cover.html')) + cover_tree.find('//' + XHTMLNS('img')).set('src', c_name) + zip.writestr('OPS/cover.html', etree.tostring( + cover_tree, method="html", pretty_print=True)) + + manifest.append(etree.fromstring( + '')) + manifest.append(etree.fromstring( + '' % (c_name, c.mime_type()))) + spine.insert(0, etree.fromstring('')) + opf.getroot()[0].append(etree.fromstring('')) + guide.append(etree.fromstring('')) + annotations = etree.Element('annotations') @@ -361,32 +429,66 @@ def transform(provider, slug, output_file): '"-//NISO//DTD ncx 2005-1//EN" "http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">' \ '' \ - '' \ - 'Strona tytułowa' \ - '' \ - 'Początek utworu' \ - '') + '') nav_map = toc_file[-1] - toc, chunk_counter = transform_file(input_xml) - toc_counter = toc.write_to_xml(nav_map, 3) # we already have 2 navpoints + if html_toc: + manifest.append(etree.fromstring( + '')) + spine.append(etree.fromstring( + '')) + guide.append(etree.fromstring('')) + + toc, chunk_counter, chars, sample = transform_file(document, sample=sample) + + if len(toc.children) < 2: + toc.add(u"Początek utworu", "part1.html") # Last modifications in container files and EPUB creation if len(annotations) > 0: - nav_map.append(etree.fromstring( - 'Przypisy'\ - '' % {'i': toc_counter})) + toc.add("Przypisy", "annotations.html") manifest.append(etree.fromstring( '')) spine.append(etree.fromstring( '')) replace_by_verse(annotations) + html_tree = xslt(annotations, get_resource('epub/xsltAnnotations.xsl')) + chars = chars.union(used_chars(html_tree.getroot())) zip.writestr('OPS/annotations.html', etree.tostring( - xslt(annotations, res("xsltAnnotations.xsl")), pretty_print=True)) + html_tree, method="html", pretty_print=True)) + + toc.add("Strona redakcyjna", "last.html") + manifest.append(etree.fromstring( + '')) + spine.append(etree.fromstring( + '')) + html_tree = xslt(document.edoc, get_resource('epub/xsltLast.xsl')) + chars.update(used_chars(html_tree.getroot())) + zip.writestr('OPS/last.html', etree.tostring( + html_tree, method="html", pretty_print=True)) + + if not flags or not 'without-fonts' in flags: + # strip fonts + tmpdir = mkdtemp('-librarian-epub') + cwd = os.getcwd() + + os.chdir(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'font-optimizer')) + for fname in 'DejaVuSerif.ttf', 'DejaVuSerif-Bold.ttf', 'DejaVuSerif-Italic.ttf', 'DejaVuSerif-BoldItalic.ttf': + optimizer_call = ['perl', 'subset.pl', '--chars', ''.join(chars).encode('utf-8'), + get_resource('fonts/' + fname), os.path.join(tmpdir, fname)] + if verbose: + print "Running font-optimizer" + subprocess.check_call(optimizer_call) + else: + subprocess.check_call(optimizer_call, stdout=subprocess.PIPE, stderr=subprocess.PIPE) + zip.write(os.path.join(tmpdir, fname), os.path.join('OPS', fname)) + manifest.append(etree.fromstring( + '' % (fname, fname))) + rmtree(tmpdir) + os.chdir(cwd) zip.writestr('OPS/content.opf', etree.tostring(opf, pretty_print=True)) - contents = [] - title = node_name(etree.ETXPath('.//'+DCNS('title'))(input_xml)[0]) + title = document.book_info.title attributes = "dtb:uid", "dtb:depth", "dtb:totalPageCount", "dtb:maxPageNumber" for st in attributes: meta = toc_file.makeelement(NCXNS('meta')) @@ -396,19 +498,13 @@ def transform(provider, slug, output_file): toc_file[0][0].set('content', ''.join((title, 'WolneLektury.pl'))) toc_file[0][1].set('content', str(toc.depth())) set_inner_xml(toc_file[1], ''.join(('', title, ''))) + + # write TOC + if html_toc: + toc.add(u"Spis treści", "toc.html", index=1) + zip.writestr('OPS/toc.html', toc.html().encode('utf-8')) + toc.write_to_xml(nav_map) zip.writestr('OPS/toc.ncx', etree.tostring(toc_file, pretty_print=True)) zip.close() - -if __name__ == '__main__': - if len(sys.argv) < 2: - print >> sys.stderr, 'Usage: python epub.py ' - sys.exit(1) - - main_input = sys.argv[1] - basepath, ext = os.path.splitext(main_input) - path, slug = os.path.realpath(basepath).rsplit('/', 1) - output = basepath + '.epub' - provider = DirDocProvider(path) - transform(provider, slug, open(output, 'w')) - + return OutputFile.from_filename(output_file.name)