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#! /usr/bin/env python
import codecs
import gettext
import json
# To deal with keys that occur in more than one place and have a
# different translation, gettext uses contexts and the
# pgettext(context, msg) call. This would fit well with what we
# are trying to do.
# gettext uses a hack: the context and msg are concatenated into
# one string with an unprintable character between them, '\004'.
# A lot of gettext tools can then be oblivious to contexts.
#
# The problem however is that xgettext (to extract the strings)
# doesn't support pgettext when used with --language=Python.
#
# Two possibilities:
# 1. we roll our own xgettext for javascript (starting from e.g. the
# jslint parser). The code below should be adapted to recognise
# the '\004' character and extract the context.
# 2. we abandon using contexts and combine the context and msg into
# one string. e.g. '$.ui.kFooter.Play Again'
# Other remarks:
# 1. If there is no context specified, we should not use 'default'
# as context, because that context might already be used.
# We should restructure the $.i18n.<lang> dict, e.g.:
# $.i18n.<lang> =
# { strings = { 'key': 'val', ...},
# contextualized_strings = { context1 = { 'key' : 'val', ...},
# context2 = { 'key' : 'val', ...}}};
# 2. We should rename messages.<lang>.json to messages.<lang>.js
# 3. In lesson.html we should refer to messages.js, which is a link to
# one of the messages.<lang>.js
def gettext_json(fp, indent = False):
import gettext
import json
try:
tr = gettext.GNUTranslations(fp)
keys = tr._catalog.keys()
keys.sort()
ret = {}
for k in keys:
v = tr._catalog[k]
if type(k) is tuple:
# plural: k = (key, n)
if k[0] not in ret:
ret[k[0]] = []
ret[k[0]].append(v)
else:
ret[k] = v
return json.dumps(ret, ensure_ascii = False, indent = indent)
except IOError:
return None
def usage(argv0):
print 'Usage:'
print '\t' + argv0 + ' language mo-file js-file'
if __name__ == '__main__':
import sys
if len(sys.argv) != 4:
usage(sys.argv[0])
sys.exit(1)
[lang, mo, js] = sys.argv[1:]
f = codecs.open(js, encoding='utf-8', mode='w+')
lang = sys.argv[1]
f.write('$.i18n.%s = {};\n' % lang);
f.write('$.i18n.%s.strings =\n' % lang);
f.write(gettext_json(open(mo, 'r'), True))
f.write(';\n');
f.write('$.i18n.setLocale(\'%s\');\n' % lang);
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