localizable strings

templating.py

import jinja2
from pyramid.renderers import render
from pyramid.threadlocal import get_current_request
from translationstring import TranslationString
import uuid

from myapp.utils.i18n import DEFAULT_DOMAIN

log = __import__('logging').getLogger(__name__)

def includeme(config):
    config.include('pyramid_jinja2')

    config.add_jinja2_search_path('myapp:templates')
    config.add_settings({
        'jinja2.i18n.domain': DEFAULT_DOMAIN,
        'jinja2.filters': {
            'tojson': tojson_filter,
        },
        'jinja2.finalize': translate_value,
    })

    config.add_subscriber(renderer_globals, 'pyramid.interfaces.IBeforeRender')

def renderer_globals(event):
    request = event['request']
    event['url'] = request.route_url

@jinja2.contextfilter
def tojson_filter(context, value):
    request = context.get('request') or get_current_request()
    return jinja2.Markup(render('json', value, request=request))

@jinja2.contextfunction
def translate_value(ctx, value):
    if isinstance(value, TranslationString):
        request = ctx.get('request') or get_current_request()
        return request.localizer.translate(value)
    return value