Source Code for Module oort.util.templating

 1  # Based on design in: 
 2  #   <http://www.turbogears.org/docs/plugins/template.html> 
 3  #   <http://projects.dowski.com/view/buffet> 
 4   
 5  import pkg_resources 
 6   
 7  available_engines = dict([ (entry_point.name, entry_point.load()) 
 8          for entry_point in pkg_resources. 
 9                  iter_entry_points('python.templating.engines') ]) 
10   
11 -class TemplateEngineManager(object): 
12   
13 -    def __init__(self, extra_vars_func=None, engine_opts=None): 
14          self.extra_vars_func = extra_vars_func 
15          self.engine_opts = engine_opts 
16          self.engines = {} 
17   
18 -    def get_engine_and_path(self, path, default_engine=None): 
19          if not ':' in path: 
20              dotted_path = path 
21              engine_name = default_engine 
22          else: 
23              engine_name, dotted_path = path.split(':', 1) 
24          engine = self._get_engine(engine_name) 
25          return engine, dotted_path 
26   
27 -    def render_template(self, path, data, format, fragment=False): 
28          engine, dotted_path = self.get_engine_and_path(path) 
29          result = engine.render( 
30                  data, format=format, fragment=fragment, template=dotted_path) 
31          return result 
32   
33 -    def _get_engine(self, engine_name): 
34          engine = self.engines.get(engine_name) 
35          if not engine: 
36              Engine = available_engines.get(engine_name, None) 
37              if not Engine: 
38                  msg = 'No engine for "%s" found. Please install it.' 
39                  raise TemplateEngineMissing(msg % (engine_name,)) 
40              self.engines[engine_name] = \ 
41                      engine = Engine(self.extra_vars_func, self.engine_opts) 
42          return engine 
43   
44 -class TemplateEngineMissing(Exception): 
45      pass 
46