Move native system generator to a separate script.

client/dom/scripts/systemnative.py

Index: client/dom/scripts/systemnative.py
diff --git a/client/dom/scripts/systemnative.py b/client/dom/scripts/systemnative.py
new file mode 100644
index 0000000000000000000000000000000000000000..03aa72dfa02b65ecab1e96b59d01a708361f7d98
--- /dev/null
+++ b/client/dom/scripts/systemnative.py
@@ -0,0 +1,740 @@
+#!/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
+import systemwrapping
+from generator import *
+from systembase import *
+
+class NativeImplementationSystem(System):
+
+  def __init__(self, templates, database, emitters, auxiliary_dir, output_dir):
+    super(NativeImplementationSystem, self).__init__(
+        templates, database, emitters, output_dir)
+
+    self._auxiliary_dir = auxiliary_dir
+    self._dom_public_files = []
+    self._dom_impl_files = []
+    self._cpp_header_files = []
+    self._cpp_impl_files = []
+
+  def InterfaceGenerator(self,
+                         interface,
+                         common_prefix,
+                         super_interface_name,
+                         source_filter):
+    interface_name = interface.id
+
+    dart_interface_path = self._FilePathForDartInterface(interface_name)
+    self._dom_public_files.append(dart_interface_path)
+
+    pure_interfaces = set([

[sra1, 2012/02/21 19:22:13]

This could be moved to generator.py 

+        'ElementTimeControl',
+        'ElementTraversal',
+        'MediaQueryListListener',
+        'NodeSelector',
+        'SVGExternalResourcesRequired',
+        'SVGFilterPrimitiveStandardAttributes',
+        'SVGFitToViewBox',
+        'SVGLangSpace',
+        'SVGLocatable',
+        'SVGStylable',
+        'SVGTests',
+        'SVGTransformable',
+        'SVGURIReference',
+        'SVGViewSpec',
+        'SVGZoomAndPan'])
+    if interface_name in pure_interfaces:
+      return None
+
+    dart_impl_path = self._FilePathForDartImplementation(interface_name)
+    self._dom_impl_files.append(dart_impl_path)
+
+    cpp_header_path = self._FilePathForCppHeader(interface_name)
+    self._cpp_header_files.append(cpp_header_path)
+
+    cpp_impl_path = self._FilePathForCppImplementation(interface_name)
+    self._cpp_impl_files.append(cpp_impl_path)
+
+    return NativeImplementationGenerator(interface, super_interface_name,
+        self._emitters.FileEmitter(dart_impl_path),
+        self._emitters.FileEmitter(cpp_header_path),
+        self._emitters.FileEmitter(cpp_impl_path),
+        self._BaseDefines(interface),
+        self._templates)
+
+  def ProcessCallback(self, interface, info):
+    self._interface = interface
+
+    dart_interface_path = self._FilePathForDartInterface(self._interface.id)
+    self._dom_public_files.append(dart_interface_path)
+
+    cpp_header_handlers_emitter = emitter.Emitter()
+    cpp_impl_handlers_emitter = emitter.Emitter()
+    class_name = 'Dart%s' % self._interface.id
+    for operation in interface.operations:
+      if operation.type.id == 'void':
+        return_type = 'void'
+        return_prefix = ''
+      else:
+        return_type = 'bool'
+        return_prefix = 'return '
+
+      parameters = []
+      arguments = []
+      for argument in operation.arguments:
+        argument_type_info = GetIDLTypeInfo(argument.type)
+        parameters.append('%s %s' % (argument_type_info.parameter_type(),
+                                     argument.id))
+        arguments.append(argument.id)
+
+      cpp_header_handlers_emitter.Emit(
+          '\n'
+          '    virtual $TYPE handleEvent($PARAMETERS);\n',
+          TYPE=return_type, PARAMETERS=', '.join(parameters))
+
+      cpp_impl_handlers_emitter.Emit(
+          '\n'
+          '$TYPE $CLASS_NAME::handleEvent($PARAMETERS)\n'
+          '{\n'
+          '    $(RETURN_PREFIX)m_callback.handleEvent($ARGUMENTS);\n'
+          '}\n',
+          TYPE=return_type,
+          CLASS_NAME=class_name,
+          PARAMETERS=', '.join(parameters),
+          RETURN_PREFIX=return_prefix,
+          ARGUMENTS=', '.join(arguments))
+
+    cpp_header_path = self._FilePathForCppHeader(self._interface.id)
+    cpp_header_emitter = self._emitters.FileEmitter(cpp_header_path)
+    cpp_header_emitter.Emit(
+        self._templates.Load('cpp_callback_header.template'),
+        INTERFACE=self._interface.id,
+        HANDLERS=cpp_header_handlers_emitter.Fragments())
+
+    cpp_impl_path = self._FilePathForCppImplementation(self._interface.id)
+    self._cpp_impl_files.append(cpp_impl_path)
+    cpp_impl_emitter = self._emitters.FileEmitter(cpp_impl_path)
+    cpp_impl_emitter.Emit(
+        self._templates.Load('cpp_callback_implementation.template'),
+        INTERFACE=self._interface.id,
+        HANDLERS=cpp_impl_handlers_emitter.Fragments())
+
+  def GenerateLibraries(self, lib_dir):
+    auxiliary_dir = os.path.relpath(self._auxiliary_dir, self._output_dir)
+
+    # Generate dom_public.dart.
+    self._GenerateLibFile(
+        'dom_public.darttemplate',
+        os.path.join(self._output_dir, 'dom_public.dart'),
+        self._dom_public_files,
+        AUXILIARY_DIR=auxiliary_dir);
+
+    # Generate dom_impl.dart.
+    self._GenerateLibFile(
+        'dom_impl.darttemplate',
+        os.path.join(self._output_dir, 'dom_impl.dart'),
+        self._dom_impl_files,
+        AUXILIARY_DIR=auxiliary_dir);
+
+    # Generate DartDerivedSourcesAll.cpp.
+    cpp_all_in_one_path = os.path.join(self._output_dir,
+        'DartDerivedSourcesAll.cpp')
+
+    includes_emitter = emitter.Emitter()
+    for f in self._cpp_impl_files:
+        path = os.path.relpath(f, os.path.dirname(cpp_all_in_one_path))
+        includes_emitter.Emit('#include "$PATH"\n', PATH=path)
+
+    cpp_all_in_one_emitter = self._emitters.FileEmitter(cpp_all_in_one_path)
+    cpp_all_in_one_emitter.Emit(
+        self._templates.Load('cpp_all_in_one.template'),
+        INCLUDES=includes_emitter.Fragments())
+
+    # Generate DartResolver.cpp.
+    cpp_resolver_path = os.path.join(self._output_dir, 'DartResolver.cpp')
+
+    includes_emitter = emitter.Emitter()
+    resolver_body_emitter = emitter.Emitter()
+    for f in self._cpp_header_files:
+      path = os.path.relpath(f, os.path.dirname(cpp_resolver_path))
+      includes_emitter.Emit('#include "$PATH"\n', PATH=path)
+      resolver_body_emitter.Emit(
+          '    if (Dart_NativeFunction func = $CLASS_NAME::resolver(name, argumentCount))\n'
+          '        return func;\n',
+          CLASS_NAME=os.path.splitext(os.path.basename(path))[0])
+
+    cpp_resolver_emitter = self._emitters.FileEmitter(cpp_resolver_path)
+    cpp_resolver_emitter.Emit(
+        self._templates.Load('cpp_resolver.template'),
+        INCLUDES=includes_emitter.Fragments(),
+        RESOLVER_BODY=resolver_body_emitter.Fragments())
+
+    # Generate DartDerivedSourcesAll.cpp
+    cpp_all_in_one_path = os.path.join(self._output_dir,
+        'DartDerivedSourcesAll.cpp')
+
+    includes_emitter = emitter.Emitter()
+    for file in self._cpp_impl_files:
+        path = os.path.relpath(file, os.path.dirname(cpp_all_in_one_path))
+        includes_emitter.Emit('#include "$PATH"\n', PATH=path)
+
+    cpp_all_in_one_emitter = self._emitters.FileEmitter(cpp_all_in_one_path)
+    cpp_all_in_one_emitter.Emit(
+        self._templates.Load('cpp_all_in_one.template'),
+        INCLUDES=includes_emitter.Fragments())
+
+    # Generate DartResolver.cpp
+    cpp_resolver_path = os.path.join(self._output_dir, 'DartResolver.cpp')
+
+    includes_emitter = emitter.Emitter()
+    resolver_body_emitter = emitter.Emitter()
+    for file in self._cpp_header_files:
+        path = os.path.relpath(file, os.path.dirname(cpp_resolver_path))
+        includes_emitter.Emit('#include "$PATH"\n', PATH=path)
+        resolver_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])
+
+    cpp_resolver_emitter = self._emitters.FileEmitter(cpp_resolver_path)
+    cpp_resolver_emitter.Emit(
+        self._templates.Load('cpp_resolver.template'),
+        INCLUDES=includes_emitter.Fragments(),
+        RESOLVER_BODY=resolver_body_emitter.Fragments())
+
+  def Finish(self):
+    pass
+
+  def _FilePathForDartInterface(self, interface_name):
+    return os.path.join(self._output_dir, 'src', 'interface',
+                        '%s.dart' % interface_name)
+
+  def _FilePathForDartImplementation(self, interface_name):
+    return os.path.join(self._output_dir, 'dart',
+                        '%sImplementation.dart' % interface_name)
+
+  def _FilePathForCppHeader(self, interface_name):
+    return os.path.join(self._output_dir, 'cpp', 'Dart%s.h' % interface_name)
+
+  def _FilePathForCppImplementation(self, interface_name):
+    return os.path.join(self._output_dir, 'cpp', 'Dart%s.cpp' % interface_name)
+
+
+class NativeImplementationGenerator(systemwrapping.WrappingInterfaceGenerator):
+  """Generates Dart implementation for one DOM IDL interface."""
+
+  def __init__(self, interface, super_interface,
+               dart_impl_emitter, cpp_header_emitter, cpp_impl_emitter,
+               base_members, templates):
+    """Generates Dart and C++ code for the given interface.
+
+    Args:
+
+      interface: an IDLInterface instance. It is assumed that all types have
+          been converted to Dart types (e.g. int, String), unless they are in
+          the same package as the interface.
+      super_interface: A string or None, the name of the common interface that
+         this interface implements, if any.
+      dart_impl_emitter: an Emitter for the file containing the Dart
+         implementation class.
+      cpp_header_emitter: an Emitter for the file containing the C++ header.
+      cpp_impl_emitter: an Emitter for the file containing the C++
+         implementation.
+      base_members: a set of names of members defined in a base class.  This is
+          used to avoid static member 'overriding' in the generated Dart code.
+    """
+    self._interface = interface
+    self._super_interface = super_interface
+    self._dart_impl_emitter = dart_impl_emitter
+    self._cpp_header_emitter = cpp_header_emitter
+    self._cpp_impl_emitter = cpp_impl_emitter
+    self._base_members = base_members
+    self._templates = templates
+    self._current_secondary_parent = None
+
+  def StartInterface(self):
+    self._class_name = self._ImplClassName(self._interface.id)
+    self._interface_type_info = GetIDLTypeInfoByName(self._interface.id)
+    self._members_emitter = emitter.Emitter()
+    self._cpp_declarations_emitter = emitter.Emitter()
+    self._cpp_impl_includes = {}
+    self._cpp_definitions_emitter = emitter.Emitter()
+    self._cpp_resolver_emitter = emitter.Emitter()
+
+    # Generate constructor.
+    # FIXME: add proper support for non-custom constructors.
+    if ('CustomConstructor' in self._interface.ext_attrs or
+        'V8CustomConstructor' in self._interface.ext_attrs or
+        self._interface.id in ['FileReader', 'WebKitCSSMatrix', 'XSLTProcessor']):
+      self._cpp_resolver_emitter.Emit(
+          '    if (name == "$(INTERFACE_NAME)_constructor_Callback")\n'
+          '        return Dart$(INTERFACE_NAME)Internal::constructorCallback;\n',
+          INTERFACE_NAME=self._interface.id)
+      self._cpp_declarations_emitter.Emit(
+          '\n'
+          'void constructorCallback(Dart_NativeArguments);\n')
+
+  def _ImplClassName(self, interface_name):
+    return interface_name + 'Implementation'
+
+  def FinishInterface(self):
+    base = self._BaseClassName(self._interface)
+    self._dart_impl_emitter.Emit(
+        self._templates.Load('dart_implementation.darttemplate'),
+        CLASS=self._class_name, BASE=base, INTERFACE=self._interface.id,
+        MEMBERS=self._members_emitter.Fragments())
+
+    self._GenerateCppHeader()
+
+    self._cpp_impl_emitter.Emit(
+        self._templates.Load('cpp_implementation.template'),
+        INTERFACE=self._interface.id,
+        INCLUDES=''.join(['#include "%s.h"\n' %
+          k for k in self._cpp_impl_includes.keys()]),
+        CALLBACKS=self._cpp_definitions_emitter.Fragments(),
+        RESOLVER=self._cpp_resolver_emitter.Fragments())
+
+  def _GenerateCppHeader(self):
+    webcore_include = self._interface_type_info.webcore_include()
+    if webcore_include:
+      webcore_include = '#include "%s.h"\n' % webcore_include
+    else:
+      webcore_include = ''
+
+    if ('CustomToJS' in self._interface.ext_attrs or
+        'CustomToJSObject' in self._interface.ext_attrs or
+        'PureInterface' in self._interface.ext_attrs or
+        'CPPPureInterface' in self._interface.ext_attrs or
+        self._interface_type_info.custom_to_dart()):
+      to_dart_value_template = (
+          'Dart_Handle toDartValue($(WEBCORE_CLASS_NAME)* value);\n')
+    else:
+      to_dart_value_template = (
+          'inline Dart_Handle toDartValue($(WEBCORE_CLASS_NAME)* value)\n'
+          '{\n'
+          '    return DartDOMWrapper::toDart<Dart$(INTERFACE)>(value);\n'
+          '}\n')
+    to_dart_value_emitter = emitter.Emitter()
+    to_dart_value_emitter.Emit(
+        to_dart_value_template,
+        INTERFACE=self._interface.id,
+        WEBCORE_CLASS_NAME=self._interface_type_info.native_type())
+
+    self._cpp_header_emitter.Emit(
+        self._templates.Load('cpp_header.template'),
+        INTERFACE=self._interface.id,
+        WEBCORE_INCLUDE=webcore_include,
+        ADDITIONAL_INCLUDES='',
+        WEBCORE_CLASS_NAME=self._interface_type_info.native_type(),
+        TO_DART_VALUE=to_dart_value_emitter.Fragments(),
+        DECLARATIONS=self._cpp_declarations_emitter.Fragments())
+
+  def AddAttribute(self, getter, setter):
+    # FIXME: Dartium does not support attribute event listeners. However, JS
+    # implementation falls back to them when addEventListener is not available.
+    # Make sure addEventListener is available in all EventTargets and remove
+    # this check.
+    if (getter or setter).type.id == 'EventListener':
+      return
+
+    # FIXME: support 'ImplementedBy'.
+    if 'ImplementedBy' in (getter or setter).ext_attrs:
+      return
+
+    # FIXME: these should go away.
+    classes_with_unsupported_custom_getters = [
+        'Clipboard', 'Console', 'Coordinates', 'DeviceMotionEvent',
+        'DeviceOrientationEvent', 'FileReader', 'JavaScriptCallFrame',
+        'HTMLInputElement', 'HTMLOptionsCollection', 'HTMLOutputElement',
+        'ScriptProfileNode', 'WebKitAnimation']
+    if (self._interface.id in classes_with_unsupported_custom_getters and
+        getter and set(['Custom', 'CustomGetter']) & set(getter.ext_attrs)):
+      return
+
+    if getter:
+      self._AddGetter(getter)
+    if setter:
+      self._AddSetter(setter)
+
+  def _AddGetter(self, attr):
+    dart_declaration = '%s get %s()' % (attr.type.id, attr.id)
+    is_custom = 'Custom' in attr.ext_attrs or 'CustomGetter' in attr.ext_attrs
+    cpp_callback_name = self._GenerateNativeBinding(attr.id, 1,
+        dart_declaration, 'Getter', is_custom)
+    if is_custom:
+      return
+
+    arguments = []
+    if 'Reflect' in attr.ext_attrs:
+      webcore_function_name = GetIDLTypeInfo(attr.type).webcore_getter_name()
+      if 'URL' in attr.ext_attrs:
+        if 'NonEmpty' in attr.ext_attrs:
+          webcore_function_name = 'getNonEmptyURLAttribute'
+        else:
+          webcore_function_name = 'getURLAttribute'
+      arguments.append(self._GenerateWebCoreReflectionAttributeName(attr))
+    else:
+      if attr.id == 'operator':
+        webcore_function_name = '_operator'
+      elif attr.id == 'target' and attr.type.id == 'SVGAnimatedString':
+        webcore_function_name = 'svgTarget'
+      else:
+        webcore_function_name = re.sub(r'^(HTML|URL|JS|XML|XSLT|\w)',
+                                       lambda s: s.group(1).lower(),
+                                       attr.id)
+        webcore_function_name = re.sub(r'^(create|exclusive)',
+                                       lambda s: 'is' + s.group(1).capitalize(),
+                                       webcore_function_name)
+      if attr.type.id.startswith('SVGAnimated'):
+        webcore_function_name += 'Animated'
+
+    self._GenerateNativeCallback(cpp_callback_name, attr, '',
+        webcore_function_name, arguments, idl_return_type=attr.type,
+        raises_dart_exceptions=attr.get_raises,
+        raises_dom_exceptions=attr.get_raises)
+
+  def _AddSetter(self, attr):
+    dart_declaration = 'void set %s(%s)' % (attr.id, attr.type.id)
+    is_custom = set(['Custom', 'CustomSetter', 'V8CustomSetter']) & set(attr.ext_attrs)
+    cpp_callback_name = self._GenerateNativeBinding(attr.id, 2,
+        dart_declaration, 'Setter', is_custom)
+    if is_custom:
+      return
+
+    arguments = []
+    if 'Reflect' in attr.ext_attrs:
+      webcore_function_name = GetIDLTypeInfo(attr.type).webcore_setter_name()
+      arguments.append(self._GenerateWebCoreReflectionAttributeName(attr))
+    else:
+      webcore_function_name = re.sub(r'^(xml(?=[A-Z])|\w)',
+                                     lambda s: s.group(1).upper(),
+                                     attr.id)
+      webcore_function_name = 'set%s' % webcore_function_name
+      if attr.type.id.startswith('SVGAnimated'):
+        webcore_function_name += 'Animated'
+
+    arguments.append(attr.id)
+    parameter_definitions_emitter = emitter.Emitter()
+    self._GenerateParameterAdapter(parameter_definitions_emitter, attr, 0)
+    parameter_definitions = parameter_definitions_emitter.Fragments()
+    self._GenerateNativeCallback(cpp_callback_name, attr, parameter_definitions,
+        webcore_function_name, arguments, idl_return_type=None,
+        raises_dart_exceptions=True,
+        raises_dom_exceptions=attr.set_raises)
+
+  def _HasNativeIndexGetter(self, interface):
+    return ('CustomIndexedGetter' in interface.ext_attrs or
+            'NumericIndexedGetter' in interface.ext_attrs)
+
+  def _EmitNativeIndexGetter(self, interface, element_type):
+    dart_declaration = '%s operator[](int index)' % element_type
+    self._GenerateNativeBinding('numericIndexGetter', 2, dart_declaration,
+        'Callback', True)
+
+  def _EmitNativeIndexSetter(self, interface, element_type):
+    dart_declaration = 'void operator[]=(int index, %s value)' % element_type
+    self._GenerateNativeBinding('numericIndexSetter', 3, dart_declaration,
+        'Callback', True)
+
+  def AddOperation(self, info):
+    """
+    Arguments:
+      info: An OperationInfo object.
+    """
+
+    if 'Custom' in info.overloads[0].ext_attrs:
+      parameters = info.ParametersImplementationDeclaration()
+      dart_declaration = '%s %s(%s)' % (info.type_name, info.name, parameters)
+      argument_count = 1 + len(info.arg_infos)
+      self._GenerateNativeBinding(info.name, argument_count, dart_declaration,
+          'Callback', True)
+      return
+
+    body = self._members_emitter.Emit(
+        '\n'
+        '  $TYPE $NAME($PARAMETERS) {\n'
+        '$!BODY'
+        '  }\n',
+        TYPE=info.type_name,
+        NAME=info.name,
+        PARAMETERS=info.ParametersImplementationDeclaration())
+
+    # Process in order of ascending number of arguments to ensure missing
+    # optional arguments are processed early.
+    overloads = sorted(info.overloads,
+                       key=lambda overload: len(overload.arguments))
+    self._native_version = 0
+    fallthrough = self.GenerateDispatch(body, info, '    ', 0, overloads)
+    if fallthrough:
+      body.Emit('    throw "Incorrect number or type of arguments";\n');
+
+  def GenerateSingleOperation(self,  dispatch_emitter, info, indent, operation):
+    """Generates a call to a single operation.
+
+    Arguments:
+      dispatch_emitter: an dispatch_emitter for the body of a block of code.
+      info: the compound information about the operation and its overloads.
+      indent: an indentation string for generated code.
+      operation: the IDLOperation to call.
+    """
+
+    # FIXME: support ImplementedBy callbacks.
+    if 'ImplementedBy' in operation.ext_attrs:
+      return
+
+    for op in self._interface.operations:
+      if op.id != operation.id or len(op.arguments) <= len(operation.arguments):
+        continue
+      next_argument = op.arguments[len(operation.arguments)]
+      if next_argument.is_optional and 'Callback' in next_argument.ext_attrs:
+        # FIXME: '[Optional, Callback]' arguments could be non-optional in
+        # webcore. We need to fix overloads handling to generate native
+        # callbacks properly.
+        return
+
+    self._native_version += 1
+    native_name = info.name
+    if self._native_version > 1:
+      native_name = '%s_%s' % (native_name, self._native_version)
+    argument_list = ', '.join([info.arg_infos[i][0]
+                               for (i, arg) in enumerate(operation.arguments)])
+
+    # Generate dispatcher.
+    if info.type_name != 'void':
+      dispatch_emitter.Emit('$(INDENT)return _$NATIVENAME($ARGS);\n',
+                            INDENT=indent,
+                            NATIVENAME=native_name,
+                            ARGS=argument_list)
+    else:
+      dispatch_emitter.Emit('$(INDENT)_$NATIVENAME($ARGS);\n'
+                            '$(INDENT)return;\n',
+                            INDENT=indent,
+                            NATIVENAME=native_name,
+                            ARGS=argument_list)
+    # Generate binding.
+    dart_declaration = '%s _%s(%s)' % (info.type_name, native_name,
+                                       argument_list)
+    is_custom = 'Custom' in operation.ext_attrs
+    cpp_callback_name = self._GenerateNativeBinding(
+        native_name, 1 + len(operation.arguments), dart_declaration, 'Callback',
+        is_custom)
+    if is_custom:
+      return
+
+    # Generate callback.
+    webcore_function_name = operation.id
+    if 'ImplementedAs' in operation.ext_attrs:
+      webcore_function_name = operation.ext_attrs['ImplementedAs']
+
+    parameter_definitions_emitter = emitter.Emitter()
+    raises_dart_exceptions = len(operation.arguments) > 0 or operation.raises
+    arguments = []
+
+    # Process 'CallWith' argument.
+    if 'CallWith' in operation.ext_attrs:
+      call_with = operation.ext_attrs['CallWith']
+      if call_with == 'ScriptExecutionContext':
+        parameter_definitions_emitter.Emit(
+            '        ScriptExecutionContext* context = DartUtilities::scriptExecutionContext();\n'
+            '        if (!context)\n'
+            '            return;\n')
+        arguments.append('context')
+      elif call_with == 'ScriptArguments|CallStack':
+        raises_dart_exceptions = True
+        self._cpp_impl_includes['ScriptArguments'] = 1
+        self._cpp_impl_includes['ScriptCallStack'] = 1
+        self._cpp_impl_includes['V8Proxy'] = 1
+        self._cpp_impl_includes['v8'] = 1
+        parameter_definitions_emitter.Emit(
+            '        v8::HandleScope handleScope;\n'
+            '        v8::Context::Scope scope(V8Proxy::mainWorldContext(DartUtilities::domWindowForCurrentIsolate()->frame()));\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(operation.arguments))
+        arguments.extend(['scriptArguments', 'scriptCallStack'])
+
+    # Process Dart arguments.
+    for (i, argument) in enumerate(operation.arguments):
+      if i == len(operation.arguments) - 1 and self._interface.id == 'Console' and argument.id == 'arg':
+        # FIXME: we are skipping last argument here because it was added in
+        # supplemental dart.idl. Cleanup dart.idl and remove this check.
+        break
+      self._GenerateParameterAdapter(parameter_definitions_emitter, argument, i)
+      arguments.append(argument.id)
+
+    if operation.id in ['addEventListener', 'removeEventListener']:
+      # addEventListener's and removeEventListener's last argument is marked
+      # as optional in idl, but is not optional in webcore implementation.
+      if len(operation.arguments) == 2:
+        arguments.append('false')
+
+    if self._interface.id == 'CSSStyleDeclaration' and operation.id == 'setProperty':
+      # CSSStyleDeclaration.setProperty priority parameter is optional in Dart
+      # idl, but is not optional in webcore implementation.
+      if len(operation.arguments) == 2:
+        arguments.append('String()')
+
+    if 'NeedsUserGestureCheck' in operation.ext_attrs:
+      arguments.extend('DartUtilities::processingUserGesture')
+
+    parameter_definitions = parameter_definitions_emitter.Fragments()
+    self._GenerateNativeCallback(cpp_callback_name, operation,
+        parameter_definitions, webcore_function_name, arguments,
+        idl_return_type=operation.type,
+        raises_dart_exceptions=raises_dart_exceptions,
+        raises_dom_exceptions=operation.raises)
+
+  def _GenerateNativeCallback(self, callback_name, idl_node,
+      parameter_definitions, function_name, arguments, idl_return_type,
+      raises_dart_exceptions, raises_dom_exceptions):
+    receiver = self._interface_type_info.receiver()
+    if raises_dom_exceptions:
+      arguments.append('ec')
+    callback = '%s%s(%s)' % (receiver, function_name, ', '.join(arguments))
+
+    nested_templates = []
+    if idl_return_type and idl_return_type.id != 'void':
+      return_type_info = GetIDLTypeInfo(idl_return_type)
+      conversion_cast = return_type_info.conversion_cast('$BODY')
+      if isinstance(return_type_info, SVGTearOffIDLTypeInfo):
+        svg_primitive_types = ['SVGAngle', 'SVGLength', 'SVGMatrix',
+            'SVGNumber', 'SVGPoint', 'SVGRect', 'SVGTransform']
+        conversion_cast = '%s::create($BODY)'
+        if self._interface.id.startswith('SVGAnimated'):
+          conversion_cast = 'static_cast<%s*>($BODY)'
+        elif return_type_info.idl_type() == 'SVGStringList':
+          conversion_cast = '%s::create(receiver, $BODY)'
+        elif self._interface.id.endswith('List'):
+          conversion_cast = 'static_cast<%s*>($BODY.get())'
+        elif return_type_info.idl_type() in svg_primitive_types:
+          conversion_cast = '%s::create($BODY)'
+        else:
+          conversion_cast = 'static_cast<%s*>($BODY)'
+        conversion_cast = conversion_cast % return_type_info.native_type()
+      nested_templates.append(conversion_cast)
+
+      if return_type_info.conversion_include():
+        self._cpp_impl_includes[return_type_info.conversion_include()] = 1
+      if (return_type_info.idl_type() in ['DOMString', 'AtomicString'] and
+          'TreatReturnedNullStringAs' in idl_node.ext_attrs):
+        nested_templates.append('$BODY, ConvertDefaultToNull')
+      nested_templates.append(
+          '        Dart_Handle returnValue = toDartValue($BODY);\n'
+          '        if (returnValue)\n'
+          '            Dart_SetReturnValue(args, returnValue);\n')
+    else:
+      nested_templates.append('        $BODY;\n')
+
+    if raises_dom_exceptions:
+      nested_templates.append(
+          '        ExceptionCode ec = 0;\n'
+          '$BODY'
+          '        if (UNLIKELY(ec)) {\n'
+          '            exception = DartDOMWrapper::exceptionCodeToDartException(ec);\n'
+          '            goto fail;\n'
+          '        }\n')
+
+    nested_templates.append(
+        '    {\n'
+        '        $WEBCORE_CLASS_NAME* receiver = DartDOMWrapper::receiver< $WEBCORE_CLASS_NAME >(args);\n'
+        '$PARAMETER_DEFINITIONS'
+        '\n'
+        '$BODY'
+        '        return;\n'
+        '    }\n')
+
+    if raises_dart_exceptions:
+      nested_templates.append(
+          '    Dart_Handle exception;\n'
+          '$BODY'
+          '\n'
+          'fail:\n'
+          '    Dart_ThrowException(exception);\n'
+          '    ASSERT_NOT_REACHED();\n')
+
+    nested_templates.append(
+        '\n'
+        'static void $CALLBACK_NAME(Dart_NativeArguments args)\n'
+        '{\n'
+        '    DartApiScope dartApiScope;\n'
+        '$BODY'
+        '}\n')
+
+    template_parameters = {
+        'CALLBACK_NAME': callback_name,
+        'WEBCORE_CLASS_NAME': self._interface_type_info.native_type(),
+        'PARAMETER_DEFINITIONS': parameter_definitions,
+    }
+    for template in nested_templates:
+      template_parameters['BODY'] = callback
+      callback_emitter = emitter.Emitter()
+      callback_emitter.Emit(template, **template_parameters)
+      callback = ''.join(callback_emitter.Fragments())
+
+    self._cpp_definitions_emitter.Emit(callback)
+
+  def _GenerateParameterAdapter(self, emitter, idl_argument, index):
+    type_info = GetIDLTypeInfo(idl_argument.type)
+    (adapter_type, include_name) = type_info.parameter_adapter_info()
+    if include_name:
+      self._cpp_impl_includes[include_name] = 1
+    emitter.Emit(
+        '\n'
+        '        const $ADAPTER_TYPE $NAME(Dart_GetNativeArgument(args, $INDEX));\n'
+        '        if (!$NAME.conversionSuccessful()) {\n'
+        '            exception = $NAME.exception();\n'
+        '            goto fail;\n'
+        '        }\n',
+        ADAPTER_TYPE=adapter_type,
+        NAME=idl_argument.id,
+        INDEX=index + 1)
+
+  def _GenerateNativeBinding(self, idl_name, argument_count, dart_declaration,
+      native_suffix, is_custom):
+    native_binding = '%s_%s_%s' % (self._interface.id, idl_name, native_suffix)
+    self._members_emitter.Emit(
+        '\n'
+        '  $DART_DECLARATION native "$NATIVE_BINDING";\n',
+        DART_DECLARATION=dart_declaration, NATIVE_BINDING=native_binding)
+
+    cpp_callback_name = '%s%s' % (idl_name, native_suffix)
+    self._cpp_resolver_emitter.Emit(
+        '    if (argumentCount == $ARGC && name == "$NATIVE_BINDING")\n'
+        '        return Dart$(INTERFACE_NAME)Internal::$CPP_CALLBACK_NAME;\n',
+        ARGC=argument_count,
+        NATIVE_BINDING=native_binding,
+        INTERFACE_NAME=self._interface.id,
+        CPP_CALLBACK_NAME=cpp_callback_name)
+
+    if is_custom:
+      self._cpp_declarations_emitter.Emit(
+          '\n'
+          'void $CPP_CALLBACK_NAME(Dart_NativeArguments);\n',
+          CPP_CALLBACK_NAME=cpp_callback_name)
+
+    return cpp_callback_name
+
+  def _GenerateWebCoreReflectionAttributeName(self, attr):
+    namespace = 'HTMLNames'
+    svg_exceptions = ['class', 'id', 'onabort', 'onclick', 'onerror', 'onload',
+                      'onmousedown', 'onmousemove', 'onmouseout', 'onmouseover',
+                      'onmouseup', 'onresize', 'onscroll', 'onunload']
+    if self._interface.id.startswith('SVG') and not attr.id in svg_exceptions:
+      namespace = 'SVGNames'
+    self._cpp_impl_includes[namespace] = 1
+
+    attribute_name = attr.ext_attrs['Reflect'] or attr.id.lower()
+    return 'WebCore::%s::%sAttr' % (namespace, attribute_name)
+