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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Support for Zope Page Templates using the simpletal library."""
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"TurboGears support for Zope Page Templates"
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from template import PageTemplate
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from simpletal import simpleTAL, simpleTALES
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logging.getLogger("simpleTAL").setLevel(logging.INFO)
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logging.getLogger("simpleTALES").setLevel(logging.INFO)
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tinstance = _zpt_cache.get(tfile)
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if tinstance is None or tinstance.stat != stat:
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tinstance = _zpt_cache[tfile] = TemplateWrapper(
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simpleTAL.compileXMLTemplate(open(tfile)), tfile, stat)
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class TemplateWrapper(object):
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def __init__(self, template, filename, stat):
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self.template = template
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self.filename = filename
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def expand(self, **info):
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context = simpleTALES.Context(allowPythonPath=1)
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for k, v in info.iteritems():
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context.addGlobal(k, v)
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s = StringIO.StringIO()
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self.template.expandInline(context, s)
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def expand_into(self, f, **info):
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context = simpleTALES.Context(allowPythonPath=1)
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for k, v in info.iteritems():
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context.addGlobal(k, v)
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self.template.expand(context, f, 'utf-8')
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return self.template.macros
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def load_template(classname):
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"""Searches for a template along the Python path.
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Template files must end in ".pt" and be in legitimate packages.
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Templates are automatically checked for changes and reloaded as
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divider = classname.rfind(".")
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package = classname[0:divider]
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basename = classname[divider+1:]
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raise ValueError, "All templates must be in a package"
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tfile = pkg_resources.resource_filename(
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package, "%s.%s" % (basename, "pt"))
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log = logging.getLogger("turbogears.zptsupport")
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def _recompile_template(package, basename, tfile, classname):
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log.debug("Recompiling template for %s" % classname)
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mod = PageTemplate(tfile)
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mtime = os.stat(tfile).st_mtime
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def __init__(self, extra_vars_func=None, options={}):
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self.options = options
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self.get_extra_vars = extra_vars_func
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self.compiledTemplates = {}
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def load_template(self, classname, loadingSite=False):
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"""Searches for a template along the Python path.
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Template files must end in ".pt" and be in legitimate packages.
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U can set "zpt.cache_templates" option to cache a loaded template
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class and only check for updates. Templates are automatically
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checked for changes and reloaded as neccessary.
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ct = self.compiledTemplates
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divider = classname.rfind(".")
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package = classname[0:divider]
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basename = classname[divider+1:]
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raise ValueError, "All templates must be in a package"
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cache_templates = self.options.get("zpt.cache_templates", True)
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tfile = pkg_resources.resource_filename(package,
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if ct.has_key(classname):
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mtime = os.stat(tfile).st_mtime
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if mod.__mtime__ != mtime:
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mod = _recompile_template(package, basename, tfile, classname)
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# use template from cache
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# First time compile template
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mod = PageTemplate(tfile)
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mod.__mtime__ = os.stat(tfile).st_mtime
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mod = PageTemplate(tfile)
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def render(self, info, format="html", fragment=False, template=None):
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"""Renders data in the desired format.
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@param info: the data / context itself
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@type format: "string"
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@para template: name of the template to use
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@type template: string
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#if isinstance(template, type):
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tinstance = self.load_template(template)
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log.debug("Applying template %s" % (tinstance.filename))
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if self.get_extra_vars:
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data.update(self.get_extra_vars())
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return str(tinstance(**data))
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def transform(self, info, template):
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"Render the output to Elements"