[svn] added jinja gti plugin

--HG--
branch : trunk

diff --git a/jinja/plugin.py b/jinja/plugin.py
new file mode 100644 (file)
index 0000000..5eb70bf
--- /dev/null
+++ b/jinja/plugin.py
@@ -0,0 +1,87 @@
+# -*- coding: utf-8 -*-
+"""
+    jinja.plugin
+    ~~~~~~~~~~~~
+
+    Support for the `GeneralTemplateInterface`__.
+
+    __ http://trac.pocoo.org/wiki/GeneralTemplateInterface
+
+    :copyright: 2007 by Armin Ronacher.
+    :license: BSD, see LICENSE for more details.
+"""
+from jinja.environment import Environment
+from jinja.loaders import FunctionLoader
+from jinja.exceptions import TemplateNotFound
+
+
+def jinja_plugin_factory(options):
+    """
+    Basic implementation of the `GeneralTemplateInterface`.
+
+    Supports ``loader_func`` and ``getmtime_func``, as well as
+    string and file loading but ignores ``mode`` since it's a
+    text based template engine.
+
+    All options passed to this function are forwarded to the
+    jinja environment. Exceptions are the following keys:
+
+    =================== =================================================
+    ``environment``     If this is provided it must be the only
+                        configuration value and it's used as jinja
+                        environment.
+    ``loader_func``     Function that takes the name of the template to
+                        load. If it returns a string or unicode object
+                        it's used to load a template. If the return
+                        value is None it's considered missing.
+    ``getmtime_func``   Function used to check if templates requires
+                        reloading. Has to return the UNIX timestamp of
+                        the last template change or 0 if this template
+                        does not exist or requires updates at any cost.
+    ``use_memcache``    Set this to ``True`` to enable memory caching.
+                        This is usually a good idea in production mode,
+                        but disable it during development since it won't
+                        reload template changes automatically.
+                        This only works in persistent environments like
+                        FastCGI.
+    ``memcache_size``   Number of template instance you want to cache.
+                        Defaults to ``40``.
+    ``cache_folder``    Set this to an existing directory to enable
+                        caching of templates on the file system. Note
+                        that this only affects templates transformed
+                        into python code. Default is ``None`` which means
+                        that caching is disabled.
+    ``auto_reload``     Set this to `False` for a slightly better
+                        performance. In that case of `getmtime_func`
+                        not being provided this won't have an effect.
+    =================== =================================================
+    """
+    if 'environment' in options:
+        env = options['environment']
+        if not len(options) == 1:
+            raise TypeError('if environment provided no other '
+                            'arguments are allowed')
+    else:
+        loader_func = options.pop('loader_func', None)
+        getmtime_func = options.pop('getmtime_func', None)
+        use_memcache = options.pop('use_memcache', False)
+        memcache_size = options.pop('memcache_size', 40)
+        cache_folder = options.pop('cache_folder', None)
+        auto_reload = options.pop('auto_reload', True)
+        if loader_func is not None:
+            options['loader'] = FunctionLoader(loader_func, getmtime_func,
+                                               use_memcache, memcache_size,
+                                               cache_folder, auto_reload)
+        env = Environment(**options)
+
+    def render_function(template, values, options):
+        if options.get('is_string'):
+            tmpl = env.from_string(template)
+        else:
+            try:
+                tmpl = env.get_template(template)
+            except TemplateNotFound:
+                return
+        return (tmpl.render(**values),)
+
+    return render_function