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import sys
from webob import Response
from zope.interface import implements
try:
from chameleon.core.template import TemplateFile
except ImportError: # pragma: no cover
exc_class, exc, tb = sys.exc_info()
# Chameleon doesn't work on non-CPython platforms
class TemplateFile(object):
def __init__(self, *arg, **kw):
raise ImportError, exc, tb
try:
from chameleon.zpt.language import Parser
except ImportError: # pragma: no cover
# Chameleon doesn't work on non-CPython platforms
class Parser(object):
pass
from repoze.bfg.interfaces import IResponseFactory
from repoze.bfg.interfaces import ITemplateRenderer
from repoze.bfg.interfaces import IChameleonTranslate
from repoze.bfg.decorator import reify
from repoze.bfg.renderers import template_renderer_factory
from repoze.bfg.settings import get_settings
from repoze.bfg.threadlocal import get_current_registry
class TextTemplateFile(TemplateFile):
default_parser = Parser()
def __init__(self, filename, parser=None, format='text', doctype=None,
**kwargs):
if parser is None:
parser = self.default_parser
super(TextTemplateFile, self).__init__(filename, parser, format,
doctype, **kwargs)
def renderer_factory(path):
return template_renderer_factory(path, TextTemplateRenderer)
class TextTemplateRenderer(object):
implements(ITemplateRenderer)
def __init__(self, path):
self.path = path
@reify # avoid looking up reload_templates before manager pushed
def template(self):
settings = get_settings()
auto_reload = settings and settings['reload_templates']
reg = get_current_registry()
translate = None
if reg is not None:
translate = reg.queryUtility(IChameleonTranslate)
return TextTemplateFile(self.path, auto_reload=auto_reload,
translate=translate)
def implementation(self):
return self.template
def __call__(self, value, system):
try:
system.update(value)
except (TypeError, ValueError):
raise ValueError('renderer was passed non-dictionary as value')
result = self.template(**system)
return result
def get_renderer(path):
""" Return a callable object which can be used to render a
:term:`Chameleon` text template using the template implied by the
``path`` argument. The ``path`` argument may be a
package-relative path, an absolute path, or a :term:`resource
specification`."""
return renderer_factory(path)
def get_template(path):
""" Return the underyling object representing a :term:`Chameleon`
text template using the template implied by the ``path`` argument.
The ``path`` argument may be a package-relative path, an absolute
path, or a :term:`resource specification`."""
renderer = renderer_factory(path)
return renderer.implementation()
def render_template(path, **kw):
""" Render a :term:`Chameleon` text template using the template
implied by the ``path`` argument. The ``path`` argument may be a
package-relative path, an absolute path, or a :term:`resource
specification`. The arguments in ``*kw`` are passed as top-level
names to the template, and so may be used within the template
itself. Returns a string."""
renderer = renderer_factory(path)
return renderer(kw, {})
def render_template_to_response(path, **kw):
""" Render a :term:`Chameleon` text template using the template
implied by the ``path`` argument. The ``path`` argument may be a
package-relative path, an absolute path, or a :term:`resource
specification`. The arguments in ``*kw`` are passed as top-level
names to the template, and so may be used within the template
itself. Returns a :term:`Response` object with the body as the
template result.."""
renderer = renderer_factory(path)
result = renderer(kw, {})
reg = get_current_registry()
response_factory = reg.queryUtility(IResponseFactory, default=Response)
return response_factory(result)
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