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1#!/usr/bin/env python
2# Copyright (c) 2012 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6'''Container nodes that don't have any logic.
7'''
8
9
10from grit.node import base
11from grit.node import include
12from grit.node import structure
13from grit.node import message
14from grit.node import io
15from grit.node import misc
16
17
18class GroupingNode(base.Node):
19  '''Base class for all the grouping elements (<structures>, <includes>,
20  <messages> and <identifiers>).'''
21  def DefaultAttributes(self):
22    return {
23      'first_id' : '',
24      'comment' : '',
25      'fallback_to_english' : 'false',
26      'fallback_to_low_resolution' : 'false',
27    }
28
29
30class IncludesNode(GroupingNode):
31  '''The <includes> element.'''
32  def _IsValidChild(self, child):
33    return isinstance(child, (include.IncludeNode, misc.IfNode, misc.PartNode))
34
35
36class MessagesNode(GroupingNode):
37  '''The <messages> element.'''
38  def _IsValidChild(self, child):
39    return isinstance(child, (message.MessageNode, misc.IfNode, misc.PartNode))
40
41
42class StructuresNode(GroupingNode):
43  '''The <structures> element.'''
44  def _IsValidChild(self, child):
45    return isinstance(child, (structure.StructureNode,
46                              misc.IfNode, misc.PartNode))
47
48
49class TranslationsNode(base.Node):
50  '''The <translations> element.'''
51  def _IsValidChild(self, child):
52    return isinstance(child, (io.FileNode, misc.IfNode, misc.PartNode))
53
54
55class OutputsNode(base.Node):
56  '''The <outputs> element.'''
57  def _IsValidChild(self, child):
58    return isinstance(child, (io.OutputNode, misc.IfNode, misc.PartNode))
59
60
61class IdentifiersNode(GroupingNode):
62  '''The <identifiers> element.'''
63  def _IsValidChild(self, child):
64    return isinstance(child, misc.IdentifierNode)
65