Support named ctors.

client/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 260 matching lines @@
       # We have a custom implementation for it.
       self._cpp_declarations_emitter.Emit(
           '\n'
           'void constructorCallback(Dart_NativeArguments);\n')
       return
 
     raises_dom_exceptions = 'ConstructorRaisesException' in self._interface.ext_attrs
     raises_dart_exceptions = raises_dom_exceptions or len(constructor_info.idl_args) > 0
     arguments = []
     parameter_definitions_emitter = emitter.Emitter()
+    create_function = 'create'
+    if 'NamedConstructor' in self._interface.ext_attrs:
+      raises_dart_exceptions = True
+      parameter_definitions_emitter.Emit(
+            '        DOMWindow* domWindow = DartUtilities::domWindowForCurrentIsolate();\n'
+            '        if (!domWindow) {\n'
+            '            exception = Dart_NewString("Failed to fetch domWindow");\n'
+            '            goto fail;\n'
+            '        }\n'
+            '        Document* document = domWindow->document();\n')
+      arguments.append('document')
+      create_function = 'createForJSConstructor'
     if 'CallWith' in self._interface.ext_attrs:
       call_with = self._interface.ext_attrs['CallWith']
       if call_with == 'ScriptExecutionContext':
         raises_dart_exceptions = True
         parameter_definitions_emitter.Emit(
             '        ScriptExecutionContext* context = DartUtilities::scriptExecutionContext();\n'
             '        if (!context) {\n'
             '            exception = Dart_NewString("Failed to create an object");\n'
             '            goto fail;\n'
             '        }\n')
         arguments.append('context')
       else:
         raise Exception('Unsupported CallWith=%s attribute' % call_with)
 
     # Process constructor arguments.
     for (i, arg) in enumerate(constructor_info.idl_args):
       self._GenerateParameterAdapter(parameter_definitions_emitter, arg, i - 1)
       arguments.append(arg.id)
 
-    function_expression = '%s::create' % self._interface_type_info.native_type()
+    function_expression = '%s::%s' % (self._interface_type_info.native_type(), create_function)
     invocation = self._GenerateWebCoreInvocation(function_expression, arguments,
         self._interface, self._interface.ext_attrs, raises_dom_exceptions)
     self._GenerateNativeCallback(callback_name='constructorCallback',
         parameter_definitions=parameter_definitions_emitter.Fragments(),
         needs_receiver=False, invocation=invocation,
         raises_exceptions=raises_dart_exceptions)
 
   def _ImplClassName(self, interface_name):
     return interface_name + 'Implementation'
 
   def _IsConstructable(self):
     # FIXME: support ConstructorTemplate.
-    # FIXME: support NamedConstructor.
-    return set(['CustomConstructor', 'V8CustomConstructor', 'Constructor']) & set(self._interface.ext_attrs)
+    return set(['CustomConstructor', 'V8CustomConstructor', 'Constructor', 'NamedConstructor']) & set(self._interface.ext_attrs)
 
   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()
 
@@ skipping 334 matching lines @@
         '}\n',
         CALLBACK_NAME=callback_name,
         BODY=body)
 
   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
     flags = ''
-    if (idl_argument.ext_attrs.get('Optionial') == 'DefaultIsNullString' or
+    if (idl_argument.ext_attrs.get('Optional') == 'DefaultIsNullString' or
         ('Optional' in idl_argument.ext_attrs and 'Callback' in idl_argument.ext_attrs)):
       flags = ', DartUtilities::ConvertNullToDefaultValue'
     emitter.Emit(
         '\n'
         '        const $ADAPTER_TYPE $NAME(Dart_GetNativeArgument(args, $INDEX)$FLAGS);\n'
         '        if (!$NAME.conversionSuccessful()) {\n'
         '            exception = $NAME.exception();\n'
         '            goto fail;\n'
         '        }\n',
         ADAPTER_TYPE=adapter_type,
@@ skipping 92 matching lines @@
           '            goto fail;\n'
           '        }\n',
           INVOCATION=invocation_template)
 
     if 'ImplementedBy' in attributes:
       arguments.insert(0, 'receiver')
       self._cpp_impl_includes[attributes['ImplementedBy']] = 1
 
     return emitter.Format(invocation_template,
         FUNCTION_CALL='%s(%s)' % (function_expression, ', '.join(arguments)))