Author: mark
Date: 2008-08-13 09:17:18 -0600 (Wed, 13 Aug 2008)
New Revision: 3558
Modified:
FormEncode/trunk/formencode/national.py
Log:
validator for languages
Modified: FormEncode/trunk/formencode/national.py
===================================================================
--- FormEncode/trunk/formencode/national.py 2008-08-13 14:28:10 UTC (rev
3557)
+++ FormEncode/trunk/formencode/national.py 2008-08-13 15:17:18 UTC (rev
3558)
@@ -46,11 +46,29 @@
def get_country(code):
return dict(get_countries())[code]
+
+ def get_languages():
+ c1 = tgformat.get_languages('en')
+ c2 = tgformat.get_languages()
+ if len(c1) > len(c2):
+ d = dict(c1)
+ d.update(dict(c2))
+ return d.items()
+ else:
+ return c2
+
+ def get_language(code):
+ try:
+ return tgformat.get_language(code)
+ except KeyError:
+ return tgformat.get_language(code, 'en')
elif has_pycountry:
# @@ mark: interestingly, common gettext notation does not work here
import gettext
gettext.bindtextdomain('iso3166', pycountry.LOCALES_DIR)
_c = lambda t: gettext.dgettext('iso3166', t)
+ gettext.bindtextdomain('iso639', pycountry.LOCALES_DIR)
+ _l = lambda t: gettext.dgettext('iso639', t)
def get_countries():
c1 = set([(e.alpha2, _c(e.name)) for e in pycountry.countries])
@@ -59,9 +77,15 @@
def get_country(code):
return _c(pycountry.countries.get(alpha2=code).name)
+
+ def get_languages():
+ return [(e.alpha2, _l(e.name)) for e in pycountry.languages]
+
+ def get_language(code):
+ return _l(pycountry.languages.get(alpha2=code).name)
else:
from warnings import warn
- warn('Please easy_install pycountry or validators handling country names
will not work.', DeprecationWarning)
+ warn('Please easy_install pycountry or validators handling country names
and/or languages will not work.', DeprecationWarning)
#endif
############################################################
@@ -620,3 +644,63 @@
if not self._phoneIsSane.search(value):
raise Invalid(self.message('phoneFormat', state), value, state)
return value
+
+############################################################
+## language validators
+############################################################
+
+class LanguageValidator(FancyValidator):
+
+ """
+ Converts a given language into its ISO 639 alpha 2 code, if there is any.
+ Returns the language's full name in the reverse.
+
+ Warning: ISO 639 neither differentiates between languages such as Cantonese
+ and Mandarin nor does it contain all spoken languages. E.g., Lechitic
+ languages are missing.
+ Warning: ISO 639 is a smaller subset of ISO 639-2
+
+ @param key_ok accept the language's code instead of its name for
input
+ defaults to True
+
+ ::
+
+ >>> l = LanguageValidator()
+ >>> l.to_python('German')
+ 'de'
+ >>> l.to_python('Chinese')
+ 'zh'
+ >>> l.to_python('Klingonian')
+ Traceback (most recent call last):
+ ...
+ Invalid: That language is not listed in ISO-639-2
+ >>> l.from_python('de')
+ 'German'
+ >>> l.from_python('zh')
+ 'Chinese'
+ """
+
+ key_ok = True
+
+ messages = {
+ 'valueNotFound': _("That language is not listed in ISO-639-2"),
+ }
+
+ def _to_python(self, value, state):
+ upval = value.upper()
+ if self.key_ok:
+ try:
+ c = get_language(value)
+ return value
+ except:
+ pass
+ for k, v in get_languages():
+ if v.upper() == upval:
+ return k
+ raise Invalid(self.message('valueNotFound', state), value, state)
+
+ def _from_python(self, value, state):
+ try:
+ return get_language(value.lower())
+ except KeyError:
+ return value
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