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# -*- coding: utf-8 -*-
"""
flask.templating
~~~~~~~~~~~~~~~~
Implements the bridge to Jinja2.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
from jinja2 import BaseLoader, FileSystemLoader, TemplateNotFound
from flask.globals import _request_ctx_stack
class _DispatchingJinjaLoader(BaseLoader):
"""A loader that looks for templates in the application and all
the module folders.
"""
def __init__(self, app):
self.app = app
def get_source(self, environment, template):
name = template
loader = None
try:
module, name = template.split('/', 1)
loader = self.app.modules[module].jinja_loader
except (ValueError, KeyError):
pass
if loader is None:
loader = self.app.jinja_loader
try:
return loader.get_source(environment, name)
except TemplateNotFound:
# re-raise the exception with the correct fileame here.
# (the one that includes the prefix)
raise TemplateNotFound(template)
def list_templates(self):
result = self.app.jinja_loader.list_templates()
for name, module in self.app.modules.iteritems():
if module.jinja_loader is not None:
for template in module.jinja_loader.list_templates():
result.append('%s/%s' % (name, template))
return result
def render_template(template_name, **context):
"""Renders a template from the template folder with the given
context.
:param template_name: the name of the template to be rendered
:param context: the variables that should be available in the
context of the template.
"""
ctx = _request_ctx_stack.top
ctx.app.update_template_context(context)
return ctx.app.jinja_env.get_template(template_name).render(context)
def render_template_string(source, **context):
"""Renders a template from the given template source string
with the given context.
:param template_name: the sourcecode of the template to be
rendered
:param context: the variables that should be available in the
context of the template.
"""
ctx = _request_ctx_stack.top
ctx.app.update_template_context(context)
return ctx.app.jinja_env.from_string(source).render(context)
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