From 7f7fa2f91467fdb2b11312be8562e7b51fdeb199 Mon Sep 17 00:00:00 2001
From: Sebastian Koslowski <sebastian.koslowski@gmail.com>
Date: Tue, 3 May 2016 17:13:08 +0200
Subject: grc: added yaml/mako support
Includes basic converter from XML/Cheetah to YAML/Mako based block format.
---
grc/core/blocks/_templates.py | 77 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 77 insertions(+)
create mode 100644 grc/core/blocks/_templates.py
(limited to 'grc/core/blocks/_templates.py')
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)
--
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