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# coding: utf-8
"""
Exposes a class that represents a parsed (or compiled) template.
This module is meant only for internal use.
"""
class ParsedTemplate(object):
def __init__(self):
"""
Arguments:
parse_tree: a list, each element of which is either--
(1) a unicode string, or
(2) a "rendering" callable that accepts a ContextStack instance
and returns a unicode string.
The possible rendering callables are the return values of the
following functions:
* RenderEngine._make_get_escaped()
* RenderEngine._make_get_inverse()
* RenderEngine._make_get_literal()
* RenderEngine._make_get_partial()
* RenderEngine._make_get_section()
"""
self._parse_tree = []
def __repr__(self):
return "[%s]" % (", ".join([repr(part) for part in self._parse_tree]))
def add(self, node):
self._parse_tree.append(node)
def render(self, engine, context):
"""
Returns: a string of type unicode.
"""
# We avoid use of the ternary operator for Python 2.4 support.
def get_unicode(val):
if type(val) is unicode:
return val
return val.render(engine, context)
parts = map(get_unicode, self._parse_tree)
s = ''.join(parts)
return unicode(s)
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