Exposing native doubles as doubles when they are read-only or method return values.

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 358 matching lines @@
         WEBCORE_CLASS_NAME_ESCAPED=
         self._interface_type_info.native_type().replace('<', '_').replace('>', '_'),
         DECLARATIONS=self._cpp_declarations_emitter.Fragments(),
         IS_NODE=TypeCheckHelper(is_node_test),
         IS_ACTIVE=TypeCheckHelper(is_active_test),
         IS_EVENT_TARGET=TypeCheckHelper(is_event_target_test),
         TO_NATIVE=to_native_emitter.Fragments(),
         TO_DART=to_dart_emitter.Fragments())
 
   def EmitAttribute(self, attribute, html_name, read_only):
-    self._AddGetter(attribute, html_name)
+    self._AddGetter(attribute, html_name, read_only)
     if not read_only:
       self._AddSetter(attribute, html_name)
 
-  def _AddGetter(self, attr, html_name):
+  def _AddGetter(self, attr, html_name, read_only):
     # Temporary hack to force dart:scalarlist clamped array for ImageData.data.
     # TODO(antonm): solve in principled way.
     if self._interface.id == 'ImageData' and html_name == 'data':
       html_name = '_data'
     type_info = self._TypeInfo(attr.type.id)
     dart_declaration = '%s get %s' % (
-        self.SecureOutputType(attr.type.id), html_name)
+        self.SecureOutputType(attr.type.id, False, read_only), html_name)
     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
 
     if 'Reflect' in attr.ext_attrs:
       webcore_function_name = self._TypeInfo(attr.type.id).webcore_getter_name()
       if 'URL' in attr.ext_attrs:
         if 'NonEmpty' in attr.ext_attrs:
@@ skipping 153 matching lines @@
         'Callback', True)
 
   def EmitOperation(self, info, html_name):
     """
     Arguments:
       info: An OperationInfo object.
     """
 
     dart_declaration = '%s%s %s(%s)' % (
         'static ' if info.IsStatic() else '',
-        self.SecureOutputType(info.type_name),
+        self.SecureOutputType(info.type_name, False, True),
         html_name,
         info.ParametersDeclaration(self._DartType))
 
     operation = info.operations[0]
     is_custom = 'Custom' in operation.ext_attrs
     has_optional_arguments = any(self._IsArgumentOptionalInWebCore(operation, argument) for argument in operation.arguments)
     needs_dispatcher = not is_custom and (len(info.operations) > 1 or has_optional_arguments)
 
     if info.callback_args:
       self._AddFutureifiedOperation(info, html_name)
@@ skipping 432 matching lines @@
     return ''.join(['#include %s\n' % include for include in sorted(includes)])
 
   def _ToWebKitName(self, name):
     name = name[0].lower() + name[1:]
     name = re.sub(r'^(hTML|uRL|jS|xML|xSLT)', lambda s: s.group(1).lower(),
                   name)
     return re.sub(r'^(create|exclusive)',
                   lambda s: 'is' + s.group(1).capitalize(),
                   name)
 
-  def _TypeInfo(self, type_name):
-    return self._type_registry.TypeInfo(type_name)
-
-  def _DartType(self, type_name):
-    return self._type_registry.DartType(type_name)
-
-
 class CPPLibraryEmitter():
   def __init__(self, emitters, cpp_sources_dir):
     self._emitters = emitters
     self._cpp_sources_dir = cpp_sources_dir
     self._library_headers = dict((lib, []) for lib in HTML_LIBRARY_NAMES)
     self._sources_list = []
 
   def CreateHeaderEmitter(self, interface_name, library_name, is_callback=False):
     path = os.path.join(self._cpp_sources_dir, 'Dart%s.h' % interface_name)
     if not is_callback:
@@ skipping 30 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')