third_party/WebKit/Source/build/scripts/make_element_factory.py

   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
  26 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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
  30 import sys
  31 from collections import defaultdict
  32
  33 import in_generator
  34 import template_expander
  35 import name_utilities
  36
  37 from make_qualified_names import MakeQualifiedNamesWriter
  38
  39
  40 class 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
 117 if __name__ == "__main__":
 118     in_generator.Maker(MakeElementFactoryWriter).main(sys.argv)