def _cook(self):
"""Compile the TAL and METAL statments.
Cooking must not fail due to compilation errors in templates.
"""
source_file = self.pt_source_file()
if self.html():
gen = TALGenerator(getEngine(), xml=0, source_file=source_file)
parser = HTMLTALParser(gen)
else:
gen = TALGenerator(getEngine(), source_file=source_file)
parser = TALParser(gen)
self._v_errors = ()
try:
parser.parseString(self._text)
self._v_program, self._v_macros = parser.getCode()
except:
self._v_errors = ["Compilation failed",
"%s: %s" % sys.exc_info()[:2]]
self._v_warnings = parser.getWarnings()
self._v_cooked = 1
def pt_render(self, source=0, extra_context={}):
"""Render this Page Template"""
if not self._v_cooked:
self._cook()
__traceback_supplement__ = (PageTemplateTracebackSupplement, self)
if self._v_errors:
raise PTRuntimeError, 'Page Template %s has errors.' % self.id
output = self.StringIO()
c = self.pt_getContext()
c.update(extra_context)
TALInterpreter(self._v_program, self._v_macros,
getEngine().getContext(c),
output,
tal=not source, strictinsert=0)()
return output.getvalue()