1#!/usr/bin/env python
2# Copyright (C) 2013 Google Inc. All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7#
8#     * Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10#     * Redistributions in binary form must reproduce the above
11# copyright notice, this list of conditions and the following disclaimer
12# in the documentation and/or other materials provided with the
13# distribution.
14#     * Neither the name of Google Inc. nor the names of its
15# contributors may be used to endorse or promote products derived from
16# this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30import sys
31from collections import defaultdict
32
33import in_generator
34import template_expander
35import name_utilities
36
37from make_qualified_names import MakeQualifiedNamesWriter
38
39
40class MakeElementFactoryWriter(MakeQualifiedNamesWriter):
41    defaults = dict(MakeQualifiedNamesWriter.default_parameters, **{
42        'JSInterfaceName': None,
43        'Conditional': None,
44        'constructorNeedsCreatedByParser': None,
45        'constructorNeedsFormElement': None,
46        'interfaceName': None,
47        'noConstructor': None,
48        'noTypeHelpers': None,
49        'runtimeEnabled': None,
50    })
51    default_parameters = dict(MakeQualifiedNamesWriter.default_parameters, **{
52        'fallbackInterfaceName': '',
53        'fallbackJSInterfaceName': '',
54    })
55    filters = MakeQualifiedNamesWriter.filters
56
57    def __init__(self, in_file_paths):
58        super(MakeElementFactoryWriter, self).__init__(in_file_paths)
59
60        # FIXME: When we start using these element factories, we'll want to
61        # remove the "new" prefix and also have our base class generate
62        # *Names.h and *Names.cpp.
63        self._outputs.update({
64            (self.namespace + 'ElementFactory.h'): self.generate_factory_header,
65            (self.namespace + 'ElementFactory.cpp'): self.generate_factory_implementation,
66        })
67
68        fallback_interface = self.tags_in_file.parameters['fallbackInterfaceName'].strip('"')
69        fallback_js_interface = self.tags_in_file.parameters['fallbackJSInterfaceName'].strip('"') or fallback_interface
70
71        interface_counts = defaultdict(int)
72        tags = self._template_context['tags']
73        for tag in tags:
74            tag['has_js_interface'] = self._has_js_interface(tag)
75            tag['js_interface'] = self._js_interface(tag)
76            tag['interface'] = self._interface(tag)
77            interface_counts[tag['interface']] += 1
78
79        for tag in tags:
80            tag['multipleTagNames'] = (interface_counts[tag['interface']] > 1 or tag['interface'] == fallback_interface)
81
82        self._template_context.update({
83            'fallback_interface': fallback_interface,
84            'fallback_js_interface': fallback_js_interface,
85        })
86
87    @template_expander.use_jinja('ElementFactory.h.tmpl', filters=filters)
88    def generate_factory_header(self):
89        return self._template_context
90
91    @template_expander.use_jinja('ElementFactory.cpp.tmpl', filters=filters)
92    def generate_factory_implementation(self):
93        return self._template_context
94
95    def _interface(self, tag):
96        if tag['interfaceName']:
97            return tag['interfaceName']
98        name = name_utilities.upper_first(tag['name'])
99        # FIXME: We shouldn't hard-code HTML here.
100        if name == 'HTML':
101            name = 'Html'
102        dash = name.find('-')
103        while dash != -1:
104            name = name[:dash] + name[dash + 1].upper() + name[dash + 2:]
105            dash = name.find('-')
106        return '%s%sElement' % (self.namespace, name)
107
108    def _js_interface(self, tag):
109        if tag['JSInterfaceName']:
110            return tag['JSInterfaceName']
111        return self._interface(tag)
112
113    def _has_js_interface(self, tag):
114        return not tag['noConstructor'] and self._js_interface(tag) != ('%sElement' % self.namespace)
115
116
117if __name__ == "__main__":
118    in_generator.Maker(MakeElementFactoryWriter).main(sys.argv)
119