mirror of https://github.com/patacrep/patacrep.git
Engine for LaTeX songbooks
http://www.patacrep.com
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105 lines
3.1 KiB
105 lines
3.1 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""PlasTeX module to process song files."""
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from plasTeX.TeX import TeX
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from plasTeX.Base.LaTeX import Sentences
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import codecs
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import locale
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import os
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import sys
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def process_unbr_spaces(node):
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r"""Replace '~' and '\ ' in node by nodes that
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will be rendered as unbreakable space.
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Return node object for convenience.
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"""
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if (type(node) == Sentences.InterWordSpace or
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(type(node) == Sentences.NoLineBreak and node.source == '~ ')):
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node.unicode = unichr(160)
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for child in node.childNodes:
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process_unbr_spaces(child)
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return node
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def simpleparse(text):
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"""Parse a simple LaTeX string.
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"""
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tex = TeX()
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tex.input(text.decode('utf8'))
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doc = tex.parse()
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return process_unbr_spaces(doc.textContent)
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class SongParser(object):
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"""Analyseur syntaxique de fichiers .sg"""
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def __init__(self):
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pass
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@staticmethod
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def create_tex():
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"""Create a TeX object, ready to parse a tex file."""
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tex = TeX()
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tex.disableLogging()
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tex.ownerDocument.context.loadBaseMacros()
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sys.path.append(os.path.dirname(__file__))
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tex.ownerDocument.context.loadPackage(tex, "plastex_patchedbabel")
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tex.ownerDocument.context.loadPackage(tex, "plastex_songs")
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sys.path.pop()
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return tex
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@classmethod
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def parse(cls, filename):
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"""Parse a TeX file, and return its plasTeX representation."""
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tex = cls.create_tex()
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tex.input(codecs.open(filename, 'r+', 'utf-8', 'replace'))
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return tex.parse()
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def parsetex(filename):
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r"""Analyse syntaxique d'un fichier .sg
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Renvoie un dictionnaire contenant les métadonnées lues dans le fichier. Les
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clefs sont :
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- languages: l'ensemble des langages utilisés (recherche des
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\selectlanguages{}) ;
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- titles: la liste des titres ;
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- args: le dictionnaire des paramètres passés à \beginsong.
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"""
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# /* BEGIN plasTeX patch
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# The following lines, and another line a few lines later, are used to
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# circumvent a plasTeX bug. It has been reported and corrected :
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# https://github.com/tiarno/plastex/commit/8f4e5a385f3cb6a04d5863f731ce24a7e856f2a4
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# To see if you can delete those lines, set your LC_TIME locale to French,
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# during a month containing diacritics (e.g. Février), and run songbook. If
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# no plasTeX bug appears, it is safe to remove those lines.
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oldlocale = locale.getlocale(locale.LC_TIME)
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locale.setlocale(locale.LC_TIME, 'C')
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# plasTeX patch END */
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# Analyse syntaxique
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doc = SongParser.parse(filename)
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# /* BEGIN plasTeX patch
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if oldlocale[0] and oldlocale[1]:
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locale.setlocale(locale.LC_TIME, "%s.%s" % oldlocale)
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# plasTeX patch END */
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# Extraction des données
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data = {
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"languages": set(),
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}
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for node in doc.allChildNodes:
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if node.nodeName == "selectlanguage":
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data["languages"].add(node.attributes['lang'])
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if node.nodeName == "beginsong":
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data["titles"] = node.attributes["titles"]
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data["args"] = node.attributes["args"]
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return data
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