Give generatored bindings classes a field remembering an index into a cache of handles on the corre…

tools/dom/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 111 matching lines @@
     cpp_type_name = _cpp_callback_map[cpp_tuple]
   elif (interface_name, cpp_name) in _cpp_overloaded_callback_map:
     cpp_type_name = _cpp_overloaded_callback_map[(interface_name, cpp_name)]
   else:
     cpp_type_name = interface_name
   return cpp_type_name
 
 class DartiumBackend(HtmlDartGenerator):
   """Generates Dart implementation for one DOM IDL interface."""
 
-  def __init__(self, interface, cpp_library_emitter, options):
+  def __init__(self, interface, cid, cpp_library_emitter, options):
     super(DartiumBackend, self).__init__(interface, options)
 
     self._interface = interface
+    self._cid = cid;
     self._cpp_library_emitter = cpp_library_emitter
     self._database = options.database
     self._template_loader = options.templates
     self._type_registry = options.type_registry
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
     self._metadata = options.metadata
 
   def ImplementsMergedMembers(self):
     # We could not add merged functions to implementation class because
     # underlying c++ object doesn't implement them. Merged functions are
@@ skipping 204 matching lines @@
       return (value[0], 'true')
     else:
       return 'true'
 
   def FinishInterface(self):
     self._GenerateCPPHeader()
 
     self._cpp_impl_emitter.Emit(
         self._template_loader.Load('cpp_implementation.template'),
         INTERFACE=self._interface.id,
+        CID=str(self._cid),
         INCLUDES=self._GenerateCPPIncludes(self._cpp_impl_includes),
         CALLBACKS=self._cpp_definitions_emitter.Fragments(),
         RESOLVER=self._cpp_resolver_emitter.Fragments(),
         WEBCORE_CLASS_NAME=self._interface_type_info.native_type(),
         WEBCORE_CLASS_NAME_ESCAPED=
         self._interface_type_info.native_type().replace('<', '_').replace('>', '_'),
         DART_IMPLEMENTATION_CLASS=self._interface_type_info.implementation_name(),
         DART_IMPLEMENTATION_LIBRARY='dart:%s' % self._renamer.GetLibraryName(self._interface))
 
   def _GenerateCPPHeader(self):
@@ skipping 768 matching lines @@
             '    if (Dart_NativeFunction func = $CLASS_NAME::resolver(name, argumentCount))\n'
             '        return func;\n',
             CLASS_NAME=os.path.splitext(os.path.basename(path))[0])
 
 def _IsOptionalStringArgumentInInitEventMethod(interface, operation, argument):
   return (
       interface.id.endswith('Event') and
       operation.id.startswith('init') and
       argument.ext_attrs.get('Default') == 'Undefined' and
       argument.type.id == 'DOMString')