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from django.template import Library, Node, TemplateSyntaxError
from django.utils import formats
from django.utils.encoding import force_text
register = Library()
@register.filter(is_safe=False)
def localize(value):
"""
Forces a value to be rendered as a localized value,
regardless of the value of ``settings.USE_L10N``.
"""
return force_text(formats.localize(value, use_l10n=True))
@register.filter(is_safe=False)
def unlocalize(value):
"""
Forces a value to be rendered as a non-localized value,
regardless of the value of ``settings.USE_L10N``.
"""
return force_text(value)
class LocalizeNode(Node):
def __init__(self, nodelist, use_l10n):
self.nodelist = nodelist
self.use_l10n = use_l10n
def __repr__(self):
return "<LocalizeNode>"
def render(self, context):
old_setting = context.use_l10n
context.use_l10n = self.use_l10n
output = self.nodelist.render(context)
context.use_l10n = old_setting
return output
@register.tag('localize')
def localize_tag(parser, token):
"""
Forces or prevents localization of values, regardless of the value of
`settings.USE_L10N`.
Sample usage::
{% localize off %}
var pi = {{ 3.1415 }};
{% endlocalize %}
"""
use_l10n = None
bits = list(token.split_contents())
if len(bits) == 1:
use_l10n = True
elif len(bits) > 2 or bits[1] not in ('on', 'off'):
raise TemplateSyntaxError("%r argument should be 'on' or 'off'" % bits[0])
else:
use_l10n = bits[1] == 'on'
nodelist = parser.parse(('endlocalize',))
parser.delete_first_token()
return LocalizeNode(nodelist, use_l10n)
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