X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/223fd8f247b4a588d263afaf798dca4cb9ffa639..be641fe5a98107edfe4fa423337c0bf8a06a9a4b:/librarian/pdf.py diff --git a/librarian/pdf.py b/librarian/pdf.py index 169d661..a0a0899 100644 --- a/librarian/pdf.py +++ b/librarian/pdf.py @@ -3,22 +3,32 @@ # This file is part of Librarian, licensed under GNU Affero GPLv3 or later. # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # +from __future__ import with_statement import os import os.path import shutil from StringIO import StringIO from tempfile import mkdtemp import re +from copy import deepcopy +from subprocess import call, PIPE + +import sys from Texml.processor import process from lxml import etree from lxml.etree import XMLSyntaxError, XSLTApplyError +from librarian.dcparser import Person from librarian.parser import WLDocument -from librarian import ParseError +from librarian import ParseError, DCNS from librarian import functions + functions.reg_substitute_entities() +functions.reg_strip() +functions.reg_starts_white() +functions.reg_ends_white() STYLESHEETS = { 'wl2tex': 'xslt/wl2tex.xslt', @@ -26,24 +36,31 @@ STYLESHEETS = { def insert_tags(doc, split_re, tagname): - print tagname - for elem in doc.iter(): + """ inserts for every occurence of `split_re' in text nodes in the `doc' tree + + >>> t = etree.fromstring('A-B-CX-Y-Z'); + >>> insert_tags(t, re.compile('-'), 'd'); + >>> print etree.tostring(t) + ABCXYZ + """ + + for elem in doc.iter(tag=etree.Element): if elem.text: chunks = split_re.split(elem.text) - elem.text = chunks.pop(0) - while chunks: + while len(chunks) > 1: ins = etree.Element(tagname) ins.tail = chunks.pop() elem.insert(0, ins) + elem.text = chunks.pop(0) if elem.tail: chunks = split_re.split(elem.tail) parent = elem.getparent() ins_index = parent.index(elem) + 1 - elem.tail = chunks.pop(0) - while chunks: + while len(chunks) > 1: ins = etree.Element(tagname) - ins.tail = chunks.pop(0) + ins.tail = chunks.pop() parent.insert(ins_index, ins) + elem.tail = chunks.pop(0) def substitute_hyphens(doc): @@ -58,67 +75,191 @@ def fix_hanging(doc): "nbsp") -def get_stylesheet(name): - return os.path.join(os.path.dirname(__file__), STYLESHEETS[name]) +def move_motifs_inside(doc): + """ moves motifs to be into block elements """ + for master in doc.xpath('//powiesc|//opowiadanie|//liryka_l|//liryka_lp|//dramat_wierszowany_l|//dramat_wierszowany_lp|//dramat_wspolczesny'): + for motif in master.xpath('motyw'): + print motif.text + for sib in motif.itersiblings(): + if sib.tag not in ('sekcja_swiatlo', 'sekcja_asterysk', 'separator_linia', 'begin', 'end', 'motyw', 'extra', 'uwaga'): + # motif shouldn't have a tail - it would be untagged text + motif.tail = None + motif.getparent().remove(motif) + sib.insert(0, motif) + break + -def transform(provider, slug, output_file=None, output_dir=None): - """ produces a pdf file +def hack_motifs(doc): + """ dirty hack for the marginpar-creates-orphans LaTeX problem + see http://www.latex-project.org/cgi-bin/ltxbugs2html?pr=latex/2304 - provider is a DocProvider - either output_file (a file-like object) or output_dir (path to file/dir) should be specified - if output_dir is specified, file will be written to //.pdf + moves motifs in stanzas from first verse to second + and from next to last to last, then inserts negative vspace before them + """ + for motif in doc.findall('//strofa//motyw'): + # find relevant verse-level tag + verse, stanza = motif, motif.getparent() + while stanza is not None and stanza.tag != 'strofa': + verse, stanza = stanza, stanza.getparent() + breaks_before = sum(1 for i in verse.itersiblings('br', preceding=True)) + breaks_after = sum(1 for i in verse.itersiblings('br')) + if (breaks_before == 0 and breaks_after > 0) or breaks_after == 1: + move_by = 1 + if breaks_after == 2: + move_by += 1 + moved_motif = deepcopy(motif) + motif.tag = 'span' + motif.text = None + moved_motif.tail = None + moved_motif.set('moved', str(move_by)) + + for br in verse.itersiblings('br'): + if move_by > 1: + move_by -= 1 + continue + br.addnext(moved_motif) + break + + +def parse_creator(doc): + """ find all dc:creator tags and add dc:creator_parsed with forenames first """ + for creator in doc.findall('//'+DCNS('creator')): + p = Person.from_text(creator.text) + creator_parsed = deepcopy(creator) + creator_parsed.tag = DCNS('creator_parsed') + creator_parsed.text = ' '.join(p.first_names + (p.last_name,)) + creator.getparent().insert(0, creator_parsed) + + +def get_resource(path): + return os.path.join(os.path.dirname(__file__), path) + +def get_stylesheet(name): + return get_resource(STYLESHEETS[name]) + + +def package_available(package, args='', verbose=False): + """ check if a verion of a latex package accepting given args is available """ + tempdir = mkdtemp('-wl2pdf-test') + fpath = os.path.join(tempdir, 'test.tex') + f = open(fpath, 'w') + f.write(r""" + \documentclass{book} + \usepackage[%s]{%s} + \begin{document} + \end{document} + """ % (args, package)) + f.close() + if verbose: + p = call(['xelatex', '-output-directory', tempdir, fpath]) + else: + p = call(['xelatex', '-interaction=batchmode', '-output-directory', tempdir, fpath], stdout=PIPE, stderr=PIPE) + shutil.rmtree(tempdir) + return p == 0 + + +def transform(provider, slug=None, file_path=None, output_file=None, output_dir=None, make_dir=False, verbose=False, save_tex=None): + """ produces a PDF file with XeLaTeX + + provider: a DocProvider + slug: slug of file to process, available by provider + file_path can be provided instead of a slug + output_file: file-like object or path to output file + output_dir: path to directory to save output file to; either this or output_file must be present + make_dir: writes output to //.pdf istead of /.pdf + verbose: prints all output from LaTeX + save_tex: path to save the intermediary LaTeX file to """ # Parse XSLT try: - style_filename = get_stylesheet("wl2tex") - style = etree.parse(style_filename) - - document = load_including_children(provider, slug) - + if file_path: + if slug: + raise ValueError('slug or file_path should be specified, not both') + document = load_including_children(provider, file_path=file_path) + else: + if not slug: + raise ValueError('either slug or file_path should be specified') + document = load_including_children(provider, slug=slug) + + # check for LaTeX packages + if not package_available('morefloats', 'maxfloats=19'): + # using old morefloats or none at all + document.edoc.getroot().set('old-morefloats', 'yes') + + # hack the tree + move_motifs_inside(document.edoc) + hack_motifs(document.edoc) + parse_creator(document.edoc) substitute_hyphens(document.edoc) fix_hanging(document.edoc) - - print etree.tostring(document.edoc) - # if output to dir, create the file - if output_dir is not None: + # find output dir + if make_dir and output_dir is not None: author = unicode(document.book_info.author) output_dir = os.path.join(output_dir, author) + # wl -> TeXML + style_filename = get_stylesheet("wl2tex") + style = etree.parse(style_filename) texml = document.transform(style) del document # no longer needed large object :) - temp = mkdtemp('wl2pdf-') + # TeXML -> LaTeX + temp = mkdtemp('-wl2pdf') tex_path = os.path.join(temp, 'doc.tex') fout = open(tex_path, 'w') - process(StringIO(texml), fout, 'utf8', 255, 0, 0) + process(StringIO(texml), fout, 'utf-8') fout.close() del texml - print "pdflatex -output-directory %s %s" % (temp, os.path.join(temp, 'doc.tex')) - if os.system("pdflatex -output-directory %s %s" % (temp, os.path.join(temp, 'doc.tex'))): + if save_tex: + shutil.copy(tex_path, save_tex) + + # LaTeX -> PDF + shutil.copy(get_resource('pdf/wl.sty'), temp) + shutil.copy(get_resource('pdf/wl-logo.png'), temp) + + cwd = os.getcwd() + os.chdir(temp) + + if verbose: + p = call(['xelatex', tex_path]) + else: + p = call(['xelatex', '-interaction=batchmode', tex_path], stdout=PIPE, stderr=PIPE) + if p: raise ParseError("Error parsing .tex file") + os.chdir(cwd) + + # save the PDF pdf_path = os.path.join(temp, 'doc.pdf') if output_dir is not None: try: os.makedirs(output_dir) except OSError: pass - output_path = os.path.join(output_dir, '%s.pdf' % slug) + if slug: + output_path = os.path.join(output_dir, '%s.pdf' % slug) + else: + output_path = os.path.join(output_dir, os.path.splitext(os.path.basename(file_path))[0] + '.pdf') shutil.move(pdf_path, output_path) else: - with open(pdf_path) as f: - output_file.write(f.read()) - output_file.close() + if hasattr(output_file, 'write'): + # file-like object + with open(pdf_path) as f: + output_file.write(f.read()) + output_file.close() + else: + # path to output file + shutil.copy(pdf_path, output_file) + shutil.rmtree(temp) - return True except (XMLSyntaxError, XSLTApplyError), e: raise ParseError(e) -def load_including_children(provider, slug=None, uri=None): +def load_including_children(provider, slug=None, uri=None, file_path=None): """ makes one big xml file with children inserted at end either slug or uri must be provided """ @@ -127,31 +268,19 @@ def load_including_children(provider, slug=None, uri=None): f = provider.by_uri(uri) elif slug: f = provider[slug] + elif file_path: + f = open(file_path, 'r') else: - raise ValueError('Neither slug nor URI provided for a book.') + raise ValueError('Neither slug, URI nor file path provided for a book.') document = WLDocument.from_file(f, True, parse_dublincore=True, preserve_lines=False) + f.close() + for child_uri in document.book_info.parts: child = load_including_children(provider, uri=child_uri) document.edoc.getroot().append(child.edoc.getroot()) return document - - -if __name__ == '__main__': - import sys - from librarian import DirDocProvider - - if len(sys.argv) < 2: - print >> sys.stderr, 'Usage: python pdf.py ' - sys.exit(1) - - main_input = sys.argv[1] - basepath, ext = os.path.splitext(main_input) - path, slug = os.path.realpath(basepath).rsplit('/', 1) - provider = DirDocProvider(path) - transform(provider, slug, output_dir=path) -