Implement automatically generated constructors for frog and dartium dart:html

client/dom/scripts/systemhtml.py

Index: client/dom/scripts/systemhtml.py
diff --git a/client/dom/scripts/systemhtml.py b/client/dom/scripts/systemhtml.py
index 64748f425d9e1ea2ddcfd0e1cda4b8009d174bc8..81629091995957d66559735a9e39bc829b3a24f6 100644
--- a/client/dom/scripts/systemhtml.py
+++ b/client/dom/scripts/systemhtml.py
@@ -591,8 +591,16 @@ class HtmlDartInterfaceGenerator(DartInterfaceGenerator):
     if suppressed_extends:
       extends_str += ' /*%s %s */' % (comment, ', '.join(suppressed_extends))
 
+    factory_provider = None
+    constructor_info = AnalyzeConstructor(self._interface)
+    if constructor_info:
+      factory_provider = '_' + typename + 'FactoryProvider';
+
     if typename in interface_factories:
-      extends_str += ' default ' + interface_factories[typename]
+      factory_provider = interface_factories[typename]
+
+    if factory_provider:
+      extends_str += ' default ' + factory_provider
 
     # TODO(vsm): Add appropriate package / namespace syntax.
     (self._members_emitter,
@@ -601,6 +609,13 @@ class HtmlDartInterfaceGenerator(DartInterfaceGenerator):
          ID=typename,
          EXTENDS=extends_str)
 
+    if constructor_info:
+      self._members_emitter.Emit(
+          '\n'
+          '  $CTOR($PARAMS);\n',
+          CTOR=typename,
+          PARAMS=constructor_info.ParametersInterfaceDeclaration());
+
     element_type = MaybeTypedArrayElementType(self._interface)
     if element_type:
       self._members_emitter.Emit(
@@ -738,6 +753,27 @@ class HtmlFrogClassGenerator(FrogInterfaceGenerator):
     if element_type:
       self.AddTypedArrayConstructors(element_type)
 
+    # Emit a factory provider class for the constructor.
+    constructor_info = AnalyzeConstructor(interface)
+    if constructor_info:
+      self._EmitFactoryProvider(interface_name, constructor_info)
+
+  def _EmitFactoryProvider(self, interface_name, constructor_info):
+    template_file = 'factoryprovider_%s.darttemplate' % interface_name
+    template = self._system._templates.TryLoad(template_file)
+    if not template:
+      template = self._system._templates.Load('factoryprovider.darttemplate')
+
+    factory_provider = '_' + interface_name + 'FactoryProvider'
+    emitter = self._system._ImplFileEmitter(factory_provider)
+    emitter.Emit(
+        template,
+        FACTORYPROVIDER=factory_provider,
+        CONSTRUCTOR=interface_name,
+        PARAMETERS=constructor_info.ParametersImplementationDeclaration(),
+        NAMED_CONSTRUCTOR=constructor_info.name or interface_name,
+        ARGUMENTS=constructor_info.ParametersAsArgumentList())
+
   def AddIndexer(self, element_type):
     """Adds all the methods required to complete implementation of List."""
     # We would like to simply inherit the implementation of everything except
@@ -1000,15 +1036,12 @@ class HtmlFrogSystem(HtmlSystem):
                          super_interface_name,
                          source_filter):
     """."""
-    dart_frog_file_path = self._FilePathForFrogImpl(interface.id)
-    self._dart_frog_file_paths.append(dart_frog_file_path)
-
     template_file = 'impl_%s.darttemplate' % interface.id
     template = self._templates.TryLoad(template_file)
     if not template:
       template = self._templates.Load('frog_impl.darttemplate')
 
-    dart_code = self._emitters.FileEmitter(dart_frog_file_path)
+    dart_code = self._ImplFileEmitter(interface.id)
     return HtmlFrogClassGenerator(self, interface, template,
                                   super_interface_name, dart_code, self._shared)
 
@@ -1023,11 +1056,12 @@ class HtmlFrogSystem(HtmlSystem):
   def Finish(self):
     pass
 
-  def _FilePathForFrogImpl(self, interface_name):
-    """Returns the file path of the Frog implementation."""
+  def _ImplFileEmitter(self, name):
+    """Returns the file emitter of the Frog implementation file."""
     # TODO(jmesserly): is this the right path
-    return os.path.join(self._output_dir, 'html', 'frog',
-                        '%s.dart' % interface_name)
+    path = os.path.join(self._output_dir, 'html', 'frog', '%s.dart' % name)
+    self._dart_frog_file_paths.append(path)
+    return self._emitters.FileEmitter(path)
 
 # -----------------------------------------------------------------------------
 
@@ -1050,25 +1084,22 @@ class HtmlDartiumSystem(HtmlSystem):
                          super_interface_name,
                          source_filter):
     """."""
-    dart_dartium_file_path = self._FilePathForImpl(interface.id)
-    self._dart_dartium_file_paths.append(dart_dartium_file_path)
-
     template_file = 'impl_%s.darttemplate' % interface.id
     template = self._templates.TryLoad(template_file)
     # TODO(jacobr): change this name as it is confusing.
     if not template:
       template = self._templates.Load('frog_impl.darttemplate')
 
-    dart_code = self._emitters.FileEmitter(dart_dartium_file_path)
+    dart_code = self._ImplFileEmitter(interface.id)
     return HtmlDartiumInterfaceGenerator(self, interface, template,
         super_interface_name, dart_code, self._BaseDefines(interface),
         self._shared)
 
-  def _FilePathForImpl(self, interface_name):
-    """Returns the file path of the Frog implementation."""
-    # TODO(jmesserly): is this the right path
-    return os.path.join(self._output_dir, 'html', 'dartium',
-                        '%s.dart' % interface_name)
+  def _ImplFileEmitter(self, name):
+    """Returns the file emitter of the Dartium implementation file."""
+    path = os.path.join(self._output_dir, 'html', 'dartium', '%s.dart' % name)
+    self._dart_dartium_file_paths.append(path)
+    return self._emitters.FileEmitter(path);
 
   def ProcessCallback(self, interface, info):
     pass
@@ -1080,7 +1111,6 @@ class HtmlDartiumSystem(HtmlSystem):
         os.path.join(lib_dir, 'html_dartium.dart'),
         (self._interface_system._dart_interface_file_paths +
          self._interface_system._dart_callback_file_paths +
-         # FIXME: Move the implementation to a separate library.
          self._dart_dartium_file_paths
          ),
         WRAPCASES='\n'.join(self._wrap_cases))
@@ -1202,6 +1232,27 @@ class HtmlDartiumInterfaceGenerator(object):
           '  $(CLASSNAME)._wrap(ptr) : super._wrap(ptr);\n',
           CLASSNAME=self._class_name)
 
+    # Emit a factory provider class for the constructor.
+    constructor_info = AnalyzeConstructor(interface)
+    if constructor_info:
+      self._EmitFactoryProvider(interface_name, constructor_info)
+
+  def _EmitFactoryProvider(self, interface_name, constructor_info):
+    template_file = 'factoryprovider_%s.darttemplate' % interface_name
+    template = self._system._templates.TryLoad(template_file)
+    if not template:
+      template = self._system._templates.Load('factoryprovider.darttemplate')
+
+    factory_provider = '_' + interface_name + 'FactoryProvider'
+    emitter = self._system._ImplFileEmitter(factory_provider)
+    emitter.Emit(
+        template,
+        FACTORYPROVIDER=factory_provider,
+        CONSTRUCTOR=interface_name,
+        PARAMETERS=constructor_info.ParametersImplementationDeclaration(),
+        NAMED_CONSTRUCTOR=constructor_info.name or interface_name,
+        ARGUMENTS=constructor_info.ParametersAsArgumentList())
+
   def _BaseClassName(self, interface):
     if not interface.parents:
       return '_DOMTypeBase'