Extract common logic from Backend.BaseClassName().

lib/html/scripts/systemnative.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 83 matching lines @@
   def ImplementationTemplate(self):
     template = None
     interface_name = self._interface_type_info.interface_name()
     if interface_name == self._interface.id or not self._database.HasInterface(interface_name):
       template_file = 'impl_%s.darttemplate' % interface_name
       template = self._template_loader.TryLoad(template_file)
     if not template:
       template = self._template_loader.Load('dart_implementation.darttemplate')
     return template
 
+  def RootClassName(self):
+    return 'NativeFieldWrapperClass1'
+
   def AdditionalImplementedInterfaces(self):
     return []
 
   def NativeSpec(self):
     return ''
 
   def StartInterface(self, memebers_emitter):
     # Create emitters for c++ implementation.
     if not IsPureInterface(self._interface.id):
       self._cpp_header_emitter = self._cpp_library_emitter.CreateHeaderEmitter(self._interface.id)
@@ skipping 51 matching lines @@
     function_expression = '%s::%s' % (self._interface_type_info.native_type(), create_function)
     self._GenerateNativeCallback(
         'constructorCallback',
         False,
         function_expression,
         self._interface,
         constructor_info.idl_args,
         self._interface.id,
         'ConstructorRaisesException' in ext_attrs)
 
-  def BaseClassName(self):
-    root_class = 'NativeFieldWrapperClass1'
-
-    if not self._interface.parents:
-      return root_class
-
-    supertype = self._interface.parents[0].type.id
-
-    if IsPureInterface(supertype):    # The class is a root.
-      return root_class
-
-    # FIXME: We're currently injecting List<..> and EventTarget as
-    # supertypes in dart.idl. We should annotate/preserve as
-    # attributes instead.  For now, this hack lets the self._interfaces
-    # inherit, but not the classes.
-    # List methods are injected in AddIndexer.
-    if IsDartListType(supertype) or IsDartCollectionType(supertype):
-      return root_class
-
-    return self._type_registry.TypeInfo(supertype).implementation_name()
-
   ATTRIBUTES_OF_CONSTRUCTABLE = set([
     'CustomConstructor',
     'V8CustomConstructor',
     'Constructor',
     'NamedConstructor'])
 
   def _IsConstructable(self):
     ext_attrs = self._interface.ext_attrs
 
     if self.ATTRIBUTES_OF_CONSTRUCTABLE & set(ext_attrs):
@@ skipping 673 matching lines @@
   def EmitResolver(self, template, output_dir):
     file_path = os.path.join(output_dir, 'DartResolver.cpp')
     includes_emitter, body_emitter = self._emitters.FileEmitter(file_path).Emit(template)
     for header_file in self._headers_list:
       path = os.path.relpath(header_file, output_dir)
       includes_emitter.Emit('#include "$PATH"\n', PATH=path)
       body_emitter.Emit(
           '    if (Dart_NativeFunction func = $CLASS_NAME::resolver(name, argumentCount))\n'
           '        return func;\n',
           CLASS_NAME=os.path.splitext(os.path.basename(path))[0])