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

   1 #!/usr/bin/env python
   2 # Copyright (C) 2013 Google Inc. All rights reserved.
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  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         'contextConditional': None,
  47         'interfaceName': None,
  48         'noConstructor': None,
  49         'noTypeHelpers': None,
  50         'runtimeEnabled': None,
  51     })
  52     default_parameters = dict(MakeQualifiedNamesWriter.default_parameters, **{
  53         'fallbackInterfaceName': '',
  54         'fallbackJSInterfaceName': '',
  55     })
  56     filters = MakeQualifiedNamesWriter.filters
  57
  58     def __init__(self, in_file_paths):
  59         super(MakeElementFactoryWriter, self).__init__(in_file_paths)
  60
  61         # FIXME: When we start using these element factories, we'll want to
  62         # remove the "new" prefix and also have our base class generate
  63         # *Names.h and *Names.cpp.
  64         self._outputs.update({
  65             (self.namespace + 'ElementFactory.h'): self.generate_factory_header,
  66             (self.namespace + 'ElementFactory.cpp'): self.generate_factory_implementation,
  67             ('V8' + self.namespace + 'ElementWrapperFactory.h'): self.generate_wrapper_factory_header,
  68             ('V8' + self.namespace + 'ElementWrapperFactory.cpp'): self.generate_wrapper_factory_implementation,
  69         })
  70
  71         fallback_interface = self.tags_in_file.parameters['fallbackInterfaceName'].strip('"')
  72         fallback_js_interface = self.tags_in_file.parameters['fallbackJSInterfaceName'].strip('"') or fallback_interface
  73
  74         interface_counts = defaultdict(int)
  75         tags = self._template_context['tags']
  76         for tag in tags:
  77             tag['has_js_interface'] = self._has_js_interface(tag)
  78             tag['js_interface'] = self._js_interface(tag)
  79             tag['interface'] = self._interface(tag)
  80             interface_counts[tag['interface']] += 1
  81
  82         for tag in tags:
  83             tag['multipleTagNames'] = (interface_counts[tag['interface']] > 1 or tag['interface'] == fallback_interface)
  84
  85         self._template_context.update({
  86             'fallback_interface': fallback_interface,
  87             'fallback_js_interface': fallback_js_interface,
  88         })
  89
  90     @template_expander.use_jinja('ElementFactory.h.tmpl', filters=filters)
  91     def generate_factory_header(self):
  92         return self._template_context
  93
  94     @template_expander.use_jinja('ElementFactory.cpp.tmpl', filters=filters)
  95     def generate_factory_implementation(self):
  96         return self._template_context
  97
  98     @template_expander.use_jinja('ElementWrapperFactory.h.tmpl', filters=filters)
  99     def generate_wrapper_factory_header(self):
 100         return self._template_context
 101
 102     @template_expander.use_jinja('ElementWrapperFactory.cpp.tmpl', filters=filters)
 103     def generate_wrapper_factory_implementation(self):
 104         return self._template_context
 105
 106     def _interface(self, tag):
 107         if tag['interfaceName']:
 108             return tag['interfaceName']
 109         name = name_utilities.upper_first(tag['name'])
 110         # FIXME: We shouldn't hard-code HTML here.
 111         if name == 'HTML':
 112             name = 'Html'
 113         dash = name.find('-')
 114         while dash != -1:
 115             name = name[:dash] + name[dash + 1].upper() + name[dash + 2:]
 116             dash = name.find('-')
 117         return '%s%sElement' % (self.namespace, name)
 118
 119     def _js_interface(self, tag):
 120         if tag['JSInterfaceName']:
 121             return tag['JSInterfaceName']
 122         return self._interface(tag)
 123
 124     def _has_js_interface(self, tag):
 125         return not tag['noConstructor'] and self._js_interface(tag) != ('%sElement' % self.namespace)
 126
 127
 128 if __name__ == "__main__":
 129     in_generator.Maker(MakeElementFactoryWriter).main(sys.argv)