1# Copyright 2013 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5from data_source_registry import CreateDataSources
6from third_party.motemplate import Motemplate
7from url_constants import GITHUB_BASE, EXTENSIONS_SAMPLES
8
9
10class TemplateRenderer(object):
11  '''Renders templates with the server's available data sources.
12  '''
13
14  def __init__(self, server_instance):
15    self._server_instance = server_instance
16
17  def Render(self,
18             template,
19             request,
20             data_sources=None,
21             additional_context=None):
22    '''Renders |template| using |request|.
23
24    Specify |data_sources| to only include the DataSources with the given names
25    when rendering the template.
26
27    Specify |additional_context| to inject additional template context when
28    rendering the template.
29    '''
30    assert isinstance(template, Motemplate), type(template)
31    render_context = CreateDataSources(self._server_instance, request)
32    if data_sources is not None:
33      render_context = dict((name, d) for name, d in render_context.iteritems()
34                            if name in data_sources)
35    render_context.update({
36      'apps_samples_url': GITHUB_BASE,
37      'base_path': self._server_instance.base_path,
38      'extensions_samples_url': EXTENSIONS_SAMPLES,
39      'static': self._server_instance.base_path + 'static',
40    })
41    render_context.update(additional_context or {})
42    render_data = template.Render(render_context)
43    return render_data.text, render_data.errors
44