Remove shadow trees and custom elements from sky/engine/.

Remove all code relating to shadow trees, insertion points, shadow
boundaries, traversing composed trees, distribution, template
documents, custom elements, registering elements, element registries,
element factories, shadow roots, etc.

Remove the following features from the IDLs and from the binding
generators: CustomElementCallbacks, Reflect*, EventHandler.

Remove the CSS custom pseudo-element concept, since we no longer have
a UA style sheet worth talking about, no longer have shadow trees or
custom elements, no longer use pseudo-elements, and generally
therefore don't use this code at all.

Author: Hixie

sky/engine/bindings/IDLExtendedAttributes.txt

@@ -38,7 +38,6 @@ CallWith=ScriptState|ScriptArguments|ActiveWindow|FirstWindow|ThisValue
 Constructor
 Custom=|Getter|Setter|VisitDOMWrapper|Wrap|PropertyGetter|PropertyEnumerator|PropertyQuery
 CustomConstructor
-CustomElementCallbacks
 Default=Undefined
 DependentLifetime
 DoNotCheckConstants
@@ -64,11 +63,6 @@ PartialInterfaceImplementedAs=*
 PrivateDart
 PutForwards=*
 RaisesException=|Getter|Setter|Constructor
-Reflect=|*
-ReflectEmpty=*
-ReflectInvalid=*
-ReflectMissing=*
-ReflectOnly=*
 Replaceable
 SetterCallWith=ExecutionContext|ScriptArguments|ActiveWindow|FirstWindow
 SetWrapperReferenceFrom=*

sky/engine/bindings/scripts/dart_attributes.py

@@ -114,22 +114,19 @@ def getter_context(interface, attribute, context):
     extended_attributes = attribute.extended_attributes
 
     cpp_value = getter_expression(interface, attribute, context)
-    # Normally we can inline the function call into the return statement to
-    # avoid the overhead of using a Ref<> temporary, but for some cases
-    # (nullable types, EventHandler, [CachedAttribute], or if there are
-    # exceptions), we need to use a local variable.
+    # Normally we can inline the function call into the return
+    # statement to avoid the overhead of using a Ref<> temporary, but
+    # for some cases (nullable types, [CachedAttribute], or if there
+    # are exceptions), we need to use a local variable.
     # FIXME: check if compilers are smart enough to inline this, and if so,
     # always use a local variable (for readability and CG simplicity).
     release = False
     if (idl_type.is_nullable or
-        base_idl_type == 'EventHandler' or
         'CachedAttribute' in extended_attributes or
-        'ReflectOnly' in extended_attributes or
         context['is_getter_raises_exception']):
         context['cpp_value_original'] = cpp_value
         cpp_value = 'result'
-        # EventHandler has special handling
-        if base_idl_type != 'EventHandler' and idl_type.is_interface_type:
+        if idl_type.is_interface_type:
             release = True
 
     dart_set_return_value = \
@@ -229,16 +226,8 @@ def setter_expression(interface, attribute, context):
         not attribute.is_static):
         arguments.append('*receiver')
     idl_type = attribute.idl_type
-    if idl_type.base_type == 'EventHandler':
-        getter_name = DartUtilities.scoped_name(interface, attribute, DartUtilities.cpp_name(attribute))
-        context['event_handler_getter_expression'] = '%s(%s)' % (
-            getter_name, ', '.join(arguments))
-        # FIXME(vsm): Do we need to support this? If so, what's our analogue of
-        # V8EventListenerList?
-        arguments.append('nullptr')
-    else:
-        attribute_name = dart_types.check_reserved_name(attribute.name)
-        arguments.append(attribute_name)
+    attribute_name = dart_types.check_reserved_name(attribute.name)
+    arguments.append(attribute_name)
     if context['is_setter_raises_exception']:
         arguments.append('es')
 

sky/engine/bindings/scripts/dart_types.py

@@ -500,15 +500,6 @@ def preprocess_idl_type_and_value(idl_type, cpp_value, extended_attributes):
     # FIXME(vsm): V8 maps 'long long' and 'unsigned long long' to double
     # as they are not representable in ECMAScript.  Should we do the same?
 
-    # HTML5 says that unsigned reflected attributes should be in the range
-    # [0, 2^31). When a value isn't in this range, a default value (or 0)
-    # should be returned instead.
-    extended_attributes = extended_attributes or {}
-    if ('Reflect' in extended_attributes and
-        idl_type.base_type in ['unsigned long', 'unsigned short']):
-        cpp_value = cpp_value.replace('getUnsignedIntegralAttribute',
-                                      'getIntegralAttribute')
-        cpp_value = 'std::max(0, %s)' % cpp_value
     return idl_type, cpp_value
 
 
@@ -645,8 +636,8 @@ def dart_conversion_type(idl_type, extended_attributes):
     # TODO(terry): Remove ForMainWorld stuff.
     'DOMWrapperForMainWorld': DART_FIX_ME,
     # FIXME(vsm): V8 has a fast path. Do we?
-    'DOMWrapperFast': 'DartConverter<{implemented_as}*>::SetReturnValue(args, WTF::getPtr({cpp_value}), {auto_scope})',
-    'DOMWrapperDefault': 'DartConverter<{implemented_as}*>::SetReturnValue(args, WTF::getPtr({cpp_value}), {auto_scope})',
+    'DOMWrapperFast': '/*DOMWrapperFast*/ DartConverter<{implemented_as}*>::SetReturnValue(args, WTF::getPtr({cpp_value}), {auto_scope})',
+    'DOMWrapperDefault': '/*DOMWrapperDefault*/ DartConverter<{implemented_as}*>::SetReturnValue(args, WTF::getPtr({cpp_value}), {auto_scope})',
     # Typed arrays don't have special Dart* classes for Dart.
     'ArrayBuffer': 'Dart_SetReturnValue(args, DartUtilities::arrayBufferToDart({cpp_value}))',
     'TypedList': 'Dart_SetReturnValue(args, DartUtilities::arrayBufferViewToDart({cpp_value}))',

sky/engine/bindings/scripts/templates/attributes_cpp.template

@@ -48,8 +48,7 @@ ExceptionState es;
   {% endif %}
   {% if attribute.cached_attribute_validation_method or
         attribute.is_getter_raises_exception or
-        attribute.is_nullable or
-        attribute.idl_type == 'EventHandler' %}
+        attribute.is_nullable %}
 {{attribute.cpp_type}} {{attribute.cpp_value}} = {{attribute.cpp_value_original}};
   {% endif %}
   {% if attribute.is_nullable %}
@@ -74,17 +73,14 @@ DART_UNIMPLEMENTED();
 {% macro attribute_setter(cpp_class, attribute) %}
 static void {{static_attribute_name(attribute, 'Setter')}}(Dart_NativeArguments args)
 {
-{% if attribute.idl_type == "EventHandler" or not attribute.cpp_setter %}
+{% if not attribute.cpp_setter %}
 {# TODO(terry): Need to fix properly. #}
     // FIXME: proper implementation.
     DART_UNIMPLEMENTED();
 {% else %}
     Dart_Handle exception = nullptr;
     {
         {{cpp_class}}* receiver = GetReceiver<{{cpp_class}}>(args);
-{% if attribute.is_custom_element_callbacks %}
-        CustomElementCallbackScope deliveryScope;
-{% endif %}
 {% set attribute_name = attribute.name if not attribute.put_forwards else 'value' %}
 
         {{attribute.local_cpp_type}} {{attribute.setter_lvalue}} = {{attribute.dart_value_to_local_cpp_value}};
@@ -151,7 +147,6 @@ if (result.isNull()) {
     result = "{{reflect_empty}}";
 {% else %}
 if (result.isEmpty()) {
-{# FIXME: should use [ReflectEmpty] instead; need to change IDL files #}
 {% if reflect_missing %}
     result = "{{reflect_missing}}";
 {% else %}

sky/engine/bindings/scripts/templates/interface_h.template

@@ -36,9 +36,6 @@ namespace {{dart_class}}Internal {
   {% if has_event_constructor %}
   void initialize{{interface_name}}ForDart({{interface_name}}Init&, const String&, const HashMap<String, Dart_Handle>&, Dart_Handle&);
   {% endif %}
-  {% for method in methods if method.is_custom_element_callbacks and not method.suppressed %}
-  void {{method.name}}_{{method.number_of_arguments}}(Dart_NativeArguments);
-  {% endfor %}
   {% for method in methods if method.is_custom or method.custom_dart_new %}
   void {{static_method_name(method.name)}}(Dart_NativeArguments args);
     {% if method.overload_index == 1 %}

sky/engine/bindings/scripts/templates/methods_cpp.template

@@ -80,9 +80,6 @@ static void {{static_method_name(method.name, overload_index)}}(Dart_NativeArgum
 {% if not method.is_static %}
     {{cpp_class}}* /* FIXME(vsm): Remove this. */ ALLOW_UNUSED receiver = GetReceiver<{{cpp_class}}>(args);
 {% endif %}
-{% if method.is_custom_element_callbacks %}
-    CustomElementCallbackScope deliveryScope;
-{% endif %}
 {% if arguments_count > 0 or
       method.has_exception_state or
       method.is_call_with_script_state or

sky/engine/bindings/scripts/v8_attributes.py

@@ -50,22 +50,12 @@ def attribute_context(interface, attribute):
 
     idl_type.add_includes_for_type()
 
-    # [CustomElementCallbacks], [Reflect]
-    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
-    is_reflect = 'Reflect' in extended_attributes
-    if is_custom_element_callbacks or is_reflect:
-        includes.add('sky/engine/core/dom/custom/custom_element_callback_scope.h')
     # [TypeChecking]
     has_type_checking_unrestricted = (
         (has_extended_attribute_value(interface, 'TypeChecking', 'Unrestricted') or
          has_extended_attribute_value(attribute, 'TypeChecking', 'Unrestricted')) and
          idl_type.name in ('Float', 'Double'))
 
-    if (base_idl_type == 'EventHandler' and
-        interface.name in ['Window'] and
-        attribute.name == 'onerror'):
-        includes.add('bindings/core/v8/V8ErrorHandler.h')
-
     context = {
         'argument_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
         'cached_attribute_validation_method': extended_attributes.get('CachedAttribute'),
@@ -82,7 +72,6 @@ def attribute_context(interface, attribute):
         'idl_type': str(idl_type),  # need trailing [] on array for Dictionary::ConversionContext::setConversionType
         'is_call_with_execution_context': v8_utilities.has_extended_attribute_value(attribute, 'CallWith', 'ExecutionContext'),
         'is_call_with_script_state': v8_utilities.has_extended_attribute_value(attribute, 'CallWith', 'ScriptState'),
-        'is_custom_element_callbacks': is_custom_element_callbacks,
         'is_getter_raises_exception':  # [RaisesException]
             'RaisesException' in extended_attributes and
             extended_attributes['RaisesException'] in (None, 'Getter'),
@@ -94,16 +83,11 @@ def attribute_context(interface, attribute):
         'is_partial_interface_member':
             'PartialInterfaceImplementedAs' in extended_attributes,
         'is_read_only': attribute.is_read_only,
-        'is_reflect': is_reflect,
         'is_replaceable': 'Replaceable' in attribute.extended_attributes,
         'is_static': attribute.is_static,
         'is_url': 'URL' in extended_attributes,
         'name': attribute.name,
         'put_forwards': 'PutForwards' in extended_attributes,
-        'reflect_empty': extended_attributes.get('ReflectEmpty'),
-        'reflect_invalid': extended_attributes.get('ReflectInvalid', ''),
-        'reflect_missing': extended_attributes.get('ReflectMissing'),
-        'reflect_only': extended_attribute_value_as_list(attribute, 'ReflectOnly'),
         'setter_callback': setter_callback_name(interface, attribute),
     }
 
@@ -161,10 +145,9 @@ def getter_expression(interface, attribute, context):
 def getter_base_name(interface, attribute, arguments):
     extended_attributes = attribute.extended_attributes
 
-    if 'Reflect' not in extended_attributes:
-        return uncapitalize(cpp_name(attribute))
+    return uncapitalize(cpp_name(attribute))
 
-    content_attribute_name = extended_attributes['Reflect'] or attribute.name.lower()
+    content_attribute_name = attribute.name.lower()
     if content_attribute_name in ['class', 'id']:
         # Special-case for performance optimization.
         return 'get%sAttribute' % content_attribute_name.capitalize()
@@ -254,18 +237,11 @@ def setter_context(interface, attribute, context):
 
 
 def setter_base_name(interface, attribute, arguments):
-    if 'Reflect' not in attribute.extended_attributes:
-        return 'set%s' % capitalize(cpp_name(attribute))
-    arguments.append(scoped_content_attribute_name(interface, attribute))
-
-    base_idl_type = attribute.idl_type.base_type
-    if base_idl_type in CONTENT_ATTRIBUTE_SETTER_NAMES:
-        return CONTENT_ATTRIBUTE_SETTER_NAMES[base_idl_type]
-    return 'setAttribute'
+    return 'set%s' % capitalize(cpp_name(attribute))
 
 
 def scoped_content_attribute_name(interface, attribute):
-    content_attribute_name = attribute.extended_attributes['Reflect'] or attribute.name.lower()
+    content_attribute_name = attribute.name.lower()
     namespace = 'HTMLNames'
     includes.add('gen/sky/core/%s.h' % namespace)
     return '%s::%sAttr' % (namespace, content_attribute_name)

sky/engine/bindings/scripts/v8_interface.py

@@ -282,7 +282,7 @@ def interface_context(interface):
     return context
 
 
-# [DeprecateAs], [Reflect]
+# [DeprecateAs]
 def constant_context(constant):
     # (Blink-only) string literals are unquoted in tokenizer, must be re-quoted
     # in C++.
@@ -296,8 +296,6 @@ def constant_context(constant):
         'cpp_class': extended_attributes.get('PartialInterfaceImplementedAs'),
         'idl_type': constant.idl_type.name,
         'name': constant.name,
-        # FIXME: use 'reflected_name' as correct 'name'
-        'reflected_name': extended_attributes.get('Reflect', constant.name),
         'value': value,
     }
 

sky/engine/bindings/scripts/v8_methods.py

@@ -99,9 +99,6 @@ def function_template():
     is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
     if is_call_with_script_state:
         includes.add('bindings/core/v8/ScriptState.h')
-    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
-    if is_custom_element_callbacks:
-        includes.add('sky/engine/core/dom/custom/custom_element_callback_scope.h')
 
     is_raises_exception = 'RaisesException' in extended_attributes
 
@@ -135,7 +132,6 @@ def function_template():
         'is_call_with_script_arguments': is_call_with_script_arguments,
         'is_call_with_script_state': is_call_with_script_state,
         'is_custom': 'Custom' in extended_attributes,
-        'is_custom_element_callbacks': is_custom_element_callbacks,
         'is_explicit_nullable': idl_type.is_explicit_nullable,
         'is_partial_interface_member':
             'PartialInterfaceImplementedAs' in extended_attributes,

sky/engine/bindings/scripts/v8_types.py

@@ -319,15 +319,6 @@ def preprocess_idl_type_and_value(idl_type, cpp_value, extended_attributes):
         if is_nullable:
             idl_type = IdlNullableType(idl_type)
         cpp_value = 'static_cast<double>(%s)' % cpp_value
-    # HTML5 says that unsigned reflected attributes should be in the range
-    # [0, 2^31). When a value isn't in this range, a default value (or 0)
-    # should be returned instead.
-    extended_attributes = extended_attributes or {}
-    if ('Reflect' in extended_attributes and
-        idl_type.base_type in ['unsigned long', 'unsigned short']):
-        cpp_value = cpp_value.replace('getUnsignedIntegralAttribute',
-                                      'getIntegralAttribute')
-        cpp_value = 'std::max(0, static_cast<int>(%s))' % cpp_value
     return idl_type, cpp_value