Move html events generation to domimpl.

lib/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
 from generator import *
 from systembase import *
+from systemhtml import *

[sra1, 2012/05/14 17:29:15]

Please make new imports more specific.

[podivilov, 2012/05/15 10:24:26]

Done.

 
 class NativeImplementationSystem(System):
 
-  def __init__(self, templates, database, emitters, auxiliary_dir, output_dir):
+  def __init__(self, templates, database, html_renames, emitters, auxiliary_dir,
+               output_dir):
     super(NativeImplementationSystem, self).__init__(
         templates, database, emitters, output_dir)
 
+    self._html_renames = html_renames
     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,
@@ skipping 208 matching lines @@
   def StartInterface(self):
     self._class_name = self._ImplClassName(self._interface.id)
     self._interface_type_info = GetIDLTypeInfo(self._interface.id)
     self._members_emitter = emitter.Emitter()
     self._cpp_declarations_emitter = emitter.Emitter()
     self._cpp_impl_includes = set()
     self._cpp_definitions_emitter = emitter.Emitter()
     self._cpp_resolver_emitter = emitter.Emitter()
 
     self._GenerateConstructors()
+    self._GenerateEvents()
 
   def _GenerateConstructors(self):
     if not self._IsConstructable():
       return
 
     # TODO(antonm): currently we don't have information about number of arguments expected by
     # the constructor, so name only dispatch.
     self._cpp_resolver_emitter.Emit(
         '    if (name == "$(INTERFACE_NAME)_constructor_Callback")\n'
         '        return Dart$(INTERFACE_NAME)Internal::constructorCallback;\n',
@@ skipping 49 matching lines @@
       arguments.append(argument_expression)
 
     function_expression = '%s::%s' % (self._interface_type_info.native_type(), create_function)
     invocation = self._GenerateWebCoreInvocation(function_expression, arguments,
         self._interface.id, 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_exceptions)
 
+  def _GenerateEvents(self):
+    events_attributes =  [attr for attr in self._interface.attributes
+                          if attr.type.id == 'EventListener']
+
+    if not 'EventTarget' in self._interface.ext_attrs and not events_attributes:
+      return
+
+    is_root = not _HasEventTargetParent(self._system._database, self._interface)
+    if is_root:
+      self._members_emitter.Emit('  EventsImplementation _on;\n')
+
+    if not events_attributes:
+      if is_root:
+        self._EmitEventGetter('EventsImplementation')
+      return
+
+    events_class = '%sEventsImplementation' % self._interface.id
+    self._EmitEventGetter(events_class)
+
+    parent = _ParentWithEventAttributes(self._system._database, self._interface) or ''
+    html_inteface = self._system._html_renames.get(self._interface.id, self._interface.id)
+    events_members = self._dart_impl_emitter.Emit(
+        '\n'
+        'class $EVENTS_CLASS extends $PARENT_EVENTS_CLASS implements $EVENTS_INTERFACE {\n'
+        '  $EVENTS_CLASS(_ptr) : super(_ptr);\n'
+        '$!MEMBERS\n'
+        '}\n',
+        EVENTS_CLASS=events_class,
+        PARENT_EVENTS_CLASS='%sEventsImplementation' % parent,
+        EVENTS_INTERFACE='html.%sEvents' % html_inteface)
+
+    events_attributes = DomToHtmlEvents(self._interface.id, events_attributes)
+    for event_name in events_attributes:
+      events_members.Emit(
+          "  EventListenerList get $HTML_NAME() => _get('$DOM_NAME');\n",
+          HTML_NAME=DomToHtmlEvent(event_name),
+          DOM_NAME=event_name)
+
+  def _EmitEventGetter(self, events_class):
+    self._members_emitter.Emit(
+        '\n'
+        '  $EVENTS_CLASS get on() {\n'
+        '    if (_on == null) _on = new $EVENTS_CLASS(this);\n'
+        '    return _on;\n'
+        '  }\n',
+        EVENTS_CLASS=events_class)
+
   def _ImplClassName(self, interface_name):
     return interface_name + 'Implementation'
 
   def _BaseClassName(self):
     if not self._interface.parents:
       return 'DOMWrapperBase'
 
     supertype = self._interface.parents[0].type.id
 
     # FIXME: We're currently injecting List<..> and EventTarget as
@@ skipping 816 matching lines @@
 def _InstanceOfNode(database, interface):
   if interface.id == 'Node':
     return True
   for parent in interface.parents:
     if not database.HasInterface(parent.type.id):
       continue
     parent_interface = database.GetInterface(parent.type.id)
     if _InstanceOfNode(database, parent_interface):
       return True
   return False
+
+def _HasEventTargetParent(database, interface):
+  for parent in interface.parents:
+    parent_name = parent.type.id
+    if parent_name == 'EventTarget' or not database.HasInterface(parent_name):
+      continue
+    parent_interface = database.GetInterface(parent.type.id)
+    if ('EventTarget' in parent_interface.ext_attrs or
+        _HasEventTargetParent(database, parent_interface)):
+      return True
+  return False
+
+def _ParentWithEventAttributes(database, interface):
+  for parent in interface.parents:
+    parent_name = parent.type.id
+    if parent_name == 'EventTarget' or not database.HasInterface(parent_name):
+      continue
+    parent_interface = database.GetInterface(parent_name)
+    for attribute in parent_interface.attributes:
+      if attribute.type.id == 'EventListener':
+        return parent_interface.id
+    parent_interface = _ParentWithEventAttributes(database, parent_interface)
+    if parent_interface:
+      return parent_interface
+  return None