Emitting CustomElementCallbackDispatcher for all APIs impacting custom element lifecycle

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 719 matching lines @@
       arguments,
       return_type,
       return_type_is_nullable,
       raises_dom_exception):
 
     ext_attrs = node.ext_attrs
 
     cpp_arguments = []
     runtime_check = None
     raises_exceptions = raises_dom_exception or arguments
+    needs_custom_element_callbacks = False
 
     # TODO(antonm): unify with ScriptState below.
     requires_stack_info = (ext_attrs.get('CallWith') == 'ScriptArguments|ScriptState' or
                            ext_attrs.get('ConstructorCallWith') == 'ScriptArguments|ScriptState' or
                            ext_attrs.get('CallWith') == 'ScriptArguments&ScriptState' or
                            ext_attrs.get('ConstructorCallWith') == 'ScriptArguments&ScriptState')
     if requires_stack_info:
       raises_exceptions = True
       cpp_arguments = ['&state', 'scriptArguments.release()']
       # WebKit uses scriptArguments to reconstruct last argument, so
@@ skipping 34 matching lines @@
       assert needs_receiver
       self._cpp_impl_includes.add('"%s.h"' % ext_attrs['ImplementedBy'])
       cpp_arguments.append('receiver')
 
     if 'Reflect' in ext_attrs:
       cpp_arguments = [self._GenerateWebCoreReflectionAttributeName(node)]
 
     if return_type_is_nullable:
       cpp_arguments = ['isNull']
 
+    if ext_attrs.get('CustomElementCallbacks') == 'Enable':
+      self._cpp_impl_includes.add('"core/dom/CustomElementCallbackDispatcher.h"')
+      needs_custom_element_callbacks = True
+
     v8EnabledPerContext = ext_attrs.get('synthesizedV8EnabledPerContext', ext_attrs.get('V8EnabledPerContext'))
     v8EnabledAtRuntime = ext_attrs.get('synthesizedV8EnabledAtRuntime', ext_attrs.get('V8EnabledAtRuntime'))
     assert(not (v8EnabledPerContext and v8EnabledAtRuntime))
 
     if v8EnabledPerContext:
       raises_exceptions = True
       self._cpp_impl_includes.add('"ContextFeatures.h"')
       self._cpp_impl_includes.add('"DOMWindow.h"')
       runtime_check = emitter.Format(
           '        if (!ContextFeatures::$(FEATURE)Enabled(DartUtilities::domWindowForCurrentIsolate()->document())) {\n'
@@ skipping 99 matching lines @@
           '\n'
           '        Dart_Handle customArgument = Dart_GetNativeArgument(args, $INDEX);\n'
           '        RefPtr<ScriptArguments> scriptArguments(DartUtilities::createScriptArguments(customArgument, exception));\n'
           '        if (!scriptArguments)\n'
           '            goto fail;\n'
           '        RefPtr<ScriptCallStack> scriptCallStack(DartUtilities::createScriptCallStack());\n'
           '        if (!scriptCallStack->size())\n'
           '            return;\n',
           INDEX=len(arguments) + 1)
 
+    if needs_custom_element_callbacks:
+      body_emitter.Emit('        CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;\n');
+
     # Emit arguments.
     start_index = 1 if needs_receiver else 0
     for i, argument in enumerate(arguments):
       type_info = self._TypeInfo(argument.type.id)
       self._cpp_impl_includes |= set(type_info.conversion_includes())
       argument_expression_template, type, cls, function = \
           type_info.to_native_info(argument, self._interface.id)
 
       def AllowsNull():
         # TODO(vsm): HTMLSelectElement's indexed setter treats a null as a remove.
@@ skipping 248 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')