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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
"""Support for Zope Page Templates using the simpletal library."""
import logging
import os
import pkg_resources
import StringIO
from simpletal import simpleTAL, simpleTALES
logging.getLogger("simpleTAL").setLevel(logging.INFO)
logging.getLogger("simpleTALES").setLevel(logging.INFO)
_zpt_cache = {}
def zpt(tfile):
tinstance = _zpt_cache.get(tfile)
stat = os.stat(tfile)
if tinstance is None or tinstance.stat != stat:
tinstance = _zpt_cache[tfile] = TemplateWrapper(
simpleTAL.compileXMLTemplate(open(tfile)), tfile, stat)
return tinstance
class TemplateWrapper(object):
def __init__(self, template, filename, stat):
self.template = template
self.filename = filename
self.stat = stat
def expand(self, **info):
context = simpleTALES.Context(allowPythonPath=1)
for k, v in info.iteritems():
context.addGlobal(k, v)
s = StringIO.StringIO()
self.template.expandInline(context, s)
return s.getvalue()
def expand_into(self, f, **info):
context = simpleTALES.Context(allowPythonPath=1)
for k, v in info.iteritems():
context.addGlobal(k, v)
self.template.expand(context, f, 'utf-8')
@property
def macros(self):
return self.template.macros
def load_template(classname):
"""Searches for a template along the Python path.
Template files must end in ".pt" and be in legitimate packages.
Templates are automatically checked for changes and reloaded as
neccessary.
"""
divider = classname.rfind(".")
if divider > -1:
package = classname[0:divider]
basename = classname[divider+1:]
else:
raise ValueError("All templates must be in a package")
tfile = pkg_resources.resource_filename(
package, "%s.%s" % (basename, "pt"))
return zpt(tfile)
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