diff options
| author | Sebastian Koslowski <sebastian.koslowski@gmail.com> | 2016-05-03 17:13:08 +0200 |
|---|---|---|
| committer | Johnathan Corgan <johnathan@corganlabs.com> | 2017-06-29 09:16:49 -0700 |
| commit | 7f7fa2f91467fdb2b11312be8562e7b51fdeb199 (patch) | |
| tree | 24268bac15b9920d2a15ddbb45eaf3b9b03718a1 /grc/core/blocks/_templates.py | |
| parent | 44cae388881821942e691a4d69a923bbd8d347db (diff) | |
grc: added yaml/mako support
Includes basic converter from XML/Cheetah to YAML/Mako based block format.
Diffstat (limited to 'grc/core/blocks/_templates.py')
| -rw-r--r-- | grc/core/blocks/_templates.py | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/grc/core/blocks/_templates.py b/grc/core/blocks/_templates.py new file mode 100644 index 0000000000..0b15166423 --- /dev/null +++ b/grc/core/blocks/_templates.py @@ -0,0 +1,77 @@ +# Copyright 2016 Free Software Foundation, Inc. +# This file is part of GNU Radio +# +# GNU Radio Companion 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. +# +# GNU Radio Companion 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA +""" +This dict class holds a (shared) cache of compiled mako templates. +These + +""" +from __future__ import absolute_import, print_function + +from mako.template import Template +from mako.exceptions import SyntaxException + +from ..errors import TemplateError + + +class MakoTemplates(dict): + + _template_cache = {} + + def __init__(self, _bind_to=None, *args, **kwargs): + self.instance = _bind_to + dict.__init__(self, *args, **kwargs) + + def __get__(self, instance, owner): + if instance is None or self.instance is not None: + return self + copy = self.__class__(_bind_to=instance, **self) + if getattr(instance.__class__, 'templates', None) is self: + setattr(instance, 'templates', copy) + return copy + + @classmethod + def compile(cls, text): + text = str(text) + try: + template = Template(text) + except SyntaxException as error: + raise TemplateError(text, *error.args) + + cls._template_cache[text] = template + return template + + def _get_template(self, text): + try: + return self._template_cache[str(text)] + except KeyError: + return self.compile(text) + + def render(self, item): + text = self.get(item) + if not text: + return '' + namespace = self.instance.namespace_templates + + try: + if isinstance(text, list): + templates = (self._get_template(t) for t in text) + return [template.render(**namespace) for template in templates] + else: + template = self._get_template(text) + return template.render(**namespace) + except Exception as error: + raise TemplateError(error, text) |