def member_context(dictionary, member):
    extended_attributes = member.extended_attributes
    idl_type = member.idl_type
    idl_type.add_includes_for_type(extended_attributes)
    unwrapped_idl_type = unwrap_nullable_if_needed(idl_type)

    if member.is_required and member.default_value:
        raise Exception(
            'Required member %s must not have a default value.' % member.name)

    def default_values():
        if not member.default_value:
            return None, None
        if member.default_value.is_null:
            return None, 'v8::Null(isolate)'
        cpp_default_value = unwrapped_idl_type.literal_cpp_value(
            member.default_value)
        v8_default_value = unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value=cpp_default_value, isolate='isolate',
            creation_context='creationContext')
        return cpp_default_value, v8_default_value

    cpp_default_value, v8_default_value = default_values()
    cpp_name = v8_utilities.cpp_name(member)
    getter_name = getter_name_for_dictionary_member(member)
    is_deprecated_dictionary = unwrapped_idl_type.name == 'Dictionary'

    return {
        'cpp_default_value': cpp_default_value,
        'cpp_name': cpp_name,
        'cpp_type': unwrapped_idl_type.cpp_type,
        'cpp_value_to_v8_value': unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value='impl.%s()' % getter_name, isolate='isolate',
            creation_context='creationContext',
            extended_attributes=extended_attributes),
        'deprecate_as': v8_utilities.deprecate_as(member),
        'enum_type': idl_type.enum_type,
        'enum_values': unwrapped_idl_type.enum_values,
        'getter_name': getter_name,
        'has_method_name': has_method_name_for_dictionary_member(member),
        'idl_type': idl_type.base_type,
        'is_interface_type': idl_type.is_interface_type and not is_deprecated_dictionary,
        'is_nullable': idl_type.is_nullable,
        'is_object': unwrapped_idl_type.name == 'Object' or is_deprecated_dictionary,
        'is_required': member.is_required,
        'name': member.name,
        'runtime_enabled_feature_name': v8_utilities.runtime_enabled_feature_name(member),  # [RuntimeEnabled]
        'setter_name': setter_name_for_dictionary_member(member),
        'null_setter_name': null_setter_name_for_dictionary_member(member),
        'v8_default_value': v8_default_value,
        'v8_value_to_local_cpp_value': unwrapped_idl_type.v8_value_to_local_cpp_value(
            extended_attributes, member.name + 'Value',
            member.name + 'CppValue', isolate='isolate', use_exception_state=True),
    }

def constant_context(constant):
    extended_attributes = constant.extended_attributes
    return {
        'cpp_class': extended_attributes.get('PartialInterfaceImplementedAs'),
        'deprecate_as': v8_utilities.deprecate_as(constant),  # [DeprecateAs]
        'idl_type': constant.idl_type.name,
        'measure_as': v8_utilities.measure_as(constant),  # [MeasureAs]
        'name': constant.name,
        # FIXME: use 'reflected_name' as correct 'name'
        'reflected_name': extended_attributes.get('Reflect', constant.name),
        'runtime_enabled_function': runtime_enabled_function_name(constant),
        'value': constant.value,
    }

def member_context(dictionary, member):
    idl_type = member.idl_type
    idl_type.add_includes_for_type()
    unwrapped_idl_type = unwrap_nullable_if_needed(idl_type)

    if member.is_required and member.default_value:
        raise Exception("Required member %s must not have a default value." % member.name)

    def default_values():
        if not member.default_value:
            return None, None
        if member.default_value.is_null:
            return None, "v8::Null(isolate)"
        cpp_default_value = unwrapped_idl_type.literal_cpp_value(member.default_value)
        v8_default_value = unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value=cpp_default_value, isolate="isolate", creation_context="creationContext"
        )
        return cpp_default_value, v8_default_value

    cpp_default_value, v8_default_value = default_values()
    cpp_name = v8_utilities.cpp_name(member)

    return {
        "cpp_default_value": cpp_default_value,
        "cpp_name": cpp_name,
        "cpp_type": unwrapped_idl_type.cpp_type,
        "cpp_value_to_v8_value": unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value="impl.%s()" % cpp_name,
            isolate="isolate",
            creation_context="creationContext",
            extended_attributes=member.extended_attributes,
        ),
        "deprecate_as": v8_utilities.deprecate_as(member),
        "enum_type": idl_type.enum_type,
        "enum_values": unwrapped_idl_type.enum_values,
        "has_method_name": has_method_name_for_dictionary_member(member),
        "idl_type": idl_type.base_type,
        "is_interface_type": idl_type.is_interface_type and not idl_type.is_dictionary,
        "is_nullable": idl_type.is_nullable,
        "is_object": unwrapped_idl_type.name == "Object",
        "is_required": member.is_required,
        "name": member.name,
        "setter_name": setter_name_for_dictionary_member(member),
        "null_setter_name": null_setter_name_for_dictionary_member(member),
        "v8_default_value": v8_default_value,
        "v8_value_to_local_cpp_value": unwrapped_idl_type.v8_value_to_local_cpp_value(
            member.extended_attributes, member.name + "Value", member.name, isolate="isolate", use_exception_state=True
        ),
    }

def generate_getter(interface, attribute, contents):
    idl_type = attribute.idl_type
    v8_types.add_includes_for_type(idl_type)
    extended_attributes = attribute.extended_attributes

    cpp_value = getter_expression(interface, attribute, contents)
    # 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.
    # FIXME: check if compilers are smart enough to inline this, and if so,
    # always use a local variable (for readability and CG simplicity).
    if (attribute.is_nullable or
        idl_type == 'EventHandler' or
        'CachedAttribute' in extended_attributes or
        contents['is_getter_raises_exception']):
        contents['cpp_value_original'] = cpp_value
        cpp_value = 'jsValue'
    contents['cpp_value'] = cpp_value

    if contents['is_keep_alive_for_gc']:
        v8_set_return_value_statement = 'v8SetReturnValue(info, wrapper)'
        includes.add('bindings/v8/V8HiddenPropertyName.h')
    else:
        v8_set_return_value_statement = v8_types.v8_set_return_value(idl_type, cpp_value, extended_attributes=extended_attributes, script_wrappable='imp')
    contents['v8_set_return_value'] = v8_set_return_value_statement

    if (idl_type == 'EventHandler' and
        interface.name in ['Window', 'WorkerGlobalScope'] and
        attribute.name == 'onerror'):
        includes.add('bindings/v8/V8ErrorHandler.h')

    # [CheckSecurityForNode]
    is_check_security_for_node = 'CheckSecurityForNode' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/v8/BindingSecurity.h')
    if is_check_security_for_node or contents['is_getter_raises_exception']:
        includes.update(set(['bindings/v8/ExceptionMessages.h',
                             'bindings/v8/ExceptionState.h']))

    contents.update({
        'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        'is_check_security_for_node': is_check_security_for_node,
        'is_unforgeable': 'Unforgeable' in extended_attributes,
        'measure_as': v8_utilities.measure_as(attribute),  # [MeasureAs]
    })

def member_context(member):
    idl_type = member.idl_type
    idl_type.add_includes_for_type()
    unwrapped_idl_type = unwrap_nullable_if_needed(idl_type)

    def default_values():
        if not member.default_value:
            return None, None
        if member.default_value.is_null:
            return None, 'v8::Null(isolate)'
        cpp_default_value = str(member.default_value)
        v8_default_value = unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value=cpp_default_value, isolate='isolate',
            creation_context='creationContext')
        return cpp_default_value, v8_default_value

    cpp_default_value, v8_default_value = default_values()
    cpp_name = v8_utilities.cpp_name(member)

    return {
        'cpp_default_value': cpp_default_value,
        'cpp_name': cpp_name,
        'cpp_type': unwrapped_idl_type.cpp_type,
        'cpp_value_to_v8_value': unwrapped_idl_type.cpp_value_to_v8_value(
            cpp_value='impl.%s()' % cpp_name, isolate='isolate',
            creation_context='creationContext',
            extended_attributes=member.extended_attributes),
        'deprecate_as': v8_utilities.deprecate_as(member),
        'enum_validation_expression': unwrapped_idl_type.enum_validation_expression,
        'has_method_name': has_method_name_for_dictionary_member(member),
        'idl_type': idl_type.base_type,
        'is_interface_type': idl_type.is_interface_type and not idl_type.is_dictionary,
        'is_nullable': idl_type.is_nullable,
        'is_object': unwrapped_idl_type.name == 'Object',
        'name': member.name,
        'setter_name': setter_name_for_dictionary_member(member),
        'null_setter_name': null_setter_name_for_dictionary_member(member),
        'use_output_parameter_for_result': unwrapped_idl_type.use_output_parameter_for_result,
        'v8_default_value': v8_default_value,
        'v8_value_to_local_cpp_value': unwrapped_idl_type.v8_value_to_local_cpp_value(
            member.extended_attributes, member.name + 'Value',
            member.name, isolate='isolate'),
    }

def attribute_context(interface, attribute):
    idl_type = attribute.idl_type
    base_idl_type = idl_type.base_type
    extended_attributes = attribute.extended_attributes

    idl_type.add_includes_for_type(extended_attributes)
    if idl_type.enum_values:
        includes.add("core/inspector/ConsoleMessage.h")

    # [CheckSecurity]
    is_do_not_check_security = "DoNotCheckSecurity" in extended_attributes
    is_check_security_for_receiver = (
        has_extended_attribute_value(interface, "CheckSecurity", "Receiver") and not is_do_not_check_security
    )
    is_check_security_for_return_value = has_extended_attribute_value(attribute, "CheckSecurity", "ReturnValue")
    if is_check_security_for_receiver or is_check_security_for_return_value:
        includes.add("bindings/core/v8/BindingSecurity.h")
    # [Constructor]
    # TODO(yukishiino): Constructors are much like methods although constructors
    # are not methods.  Constructors must be data-type properties, and we can
    # support them as a kind of methods.
    constructor_type = idl_type.constructor_type_name if is_constructor_attribute(attribute) else None
    # [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("core/dom/custom/CustomElementProcessingStack.h")
    # [ImplementedInPrivateScript]
    is_implemented_in_private_script = "ImplementedInPrivateScript" in extended_attributes
    if is_implemented_in_private_script:
        includes.add("bindings/core/v8/PrivateScriptRunner.h")
        includes.add("core/frame/LocalFrame.h")
        includes.add("platform/ScriptForbiddenScope.h")
    # [OnlyExposedToPrivateScript]
    is_only_exposed_to_private_script = "OnlyExposedToPrivateScript" in extended_attributes
    # [PerWorldBindings]
    if "PerWorldBindings" in extended_attributes:
        assert (
            idl_type.is_wrapper_type or "LogActivity" in extended_attributes
        ), "[PerWorldBindings] should only be used with wrapper types: %s.%s" % (interface.name, attribute.name)

    if (
        base_idl_type == "EventHandler"
        and interface.name in ["Window", "WorkerGlobalScope"]
        and attribute.name == "onerror"
    ):
        includes.add("bindings/core/v8/V8ErrorHandler.h")

    conditional_string = v8_utilities.conditional_string(attribute)
    if conditional_string:
        includes.add("wtf/build_config.h")

    cached_attribute_validation_method = extended_attributes.get("CachedAttribute")
    keep_alive_for_gc = is_keep_alive_for_gc(interface, attribute)
    if cached_attribute_validation_method or keep_alive_for_gc:
        includes.add("bindings/core/v8/V8HiddenValue.h")

    if "APIExperimentEnabled" in extended_attributes:
        includes.add("core/experiments/ExperimentalFeatures.h")
        includes.add("core/inspector/ConsoleMessage.h")

    context = {
        "access_control_list": access_control_list(interface, attribute),
        "activity_logging_world_list_for_getter": v8_utilities.activity_logging_world_list(
            attribute, "Getter"
        ),  # [ActivityLogging]
        "activity_logging_world_list_for_setter": v8_utilities.activity_logging_world_list(
            attribute, "Setter"
        ),  # [ActivityLogging]
        "activity_logging_world_check": v8_utilities.activity_logging_world_check(attribute),  # [ActivityLogging]
        "api_experiment_enabled": v8_utilities.api_experiment_enabled_function(attribute),  # [APIExperimentEnabled]
        "api_experiment_enabled_per_interface": v8_utilities.api_experiment_enabled_function(
            interface
        ),  # [APIExperimentEnabled]
        "api_experiment_name": extended_attributes.get("APIExperimentEnabled"),  # [APIExperimentEnabled]
        "argument_cpp_type": idl_type.cpp_type_args(used_as_rvalue_type=True),
        "cached_attribute_validation_method": cached_attribute_validation_method,
        "conditional_string": conditional_string,
        "constructor_type": constructor_type,
        "cpp_name": cpp_name(attribute),
        "cpp_type": idl_type.cpp_type,
        "cpp_type_initializer": idl_type.cpp_type_initializer,
        "deprecate_as": v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        "enum_type": idl_type.enum_type,
        "enum_values": idl_type.enum_values,
        "exposed_test": v8_utilities.exposed(attribute, interface),  # [Exposed]
        "has_custom_getter": has_custom_getter(attribute),
        "has_custom_setter": has_custom_setter(attribute),
        "has_setter": has_setter(attribute),
        "idl_type": str(idl_type),  # need trailing [] on array for Dictionary::ConversionContext::setConversionType
        "is_api_experiment_enabled": v8_utilities.api_experiment_enabled_function(attribute)
        or v8_utilities.api_experiment_enabled_function(interface),  # [APIExperimentEnabled]
        "is_call_with_execution_context": has_extended_attribute_value(attribute, "CallWith", "ExecutionContext"),
        "is_call_with_script_state": has_extended_attribute_value(attribute, "CallWith", "ScriptState"),
        "is_check_security_for_receiver": is_check_security_for_receiver,
        "is_check_security_for_return_value": is_check_security_for_return_value,
        "is_custom_element_callbacks": is_custom_element_callbacks,
        # TODO(yukishiino): Make all DOM attributes accessor-type properties.
        "is_data_type_property": constructor_type or interface.name == "Window" or interface.name == "Location",
        "is_getter_raises_exception": "RaisesException" in extended_attributes  # [RaisesException]
#.........这里部分代码省略.........

def generate_method(interface, method):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name

    v8_types.add_includes_for_type(idl_type)
    this_cpp_value = cpp_value(interface, method, len(arguments))

    def function_template():
        if is_static:
            return 'functionTemplate'
        if 'Unforgeable' in extended_attributes:
            return 'instanceTemplate'
        return 'prototypeTemplate'

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/v8/ScriptCallStackFactory.h',
                         'core/inspector/ScriptArguments.h'])
    is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
    if is_call_with_script_state:
        includes.add('bindings/v8/ScriptState.h')
    is_check_security_for_node = 'CheckSecurity' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/v8/BindingSecurity.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/dom/custom/CustomElementCallbackDispatcher.h')

    is_check_security_for_frame = (
        'CheckSecurity' in interface.extended_attributes and
        'DoNotCheckSecurity' not in extended_attributes)
    is_raises_exception = 'RaisesException' in extended_attributes

    return {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': [generate_argument(interface, method, argument, index)
                      for index, argument in enumerate(arguments)],
        'conditional_string': v8_utilities.conditional_string(method),
        'cpp_type': v8_types.cpp_type(idl_type),
        'cpp_value': this_cpp_value,
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'do_not_check_signature': not(is_static or
            v8_utilities.has_extended_attribute(method,
                ['DoNotCheckSecurity', 'DoNotCheckSignature', 'NotEnumerable',
                 'ReadOnly', 'RuntimeEnabled', 'Unforgeable'])),
        'function_template': function_template(),
        'idl_type': idl_type,
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_frame or
            any(argument for argument in arguments
                if argument.idl_type == 'SerializedScriptValue' or
                   v8_types.is_integer_type(argument.idl_type)) or
            name in ['addEventListener', 'removeEventListener'],
        'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_arguments': is_call_with_script_arguments,
        'is_call_with_script_state': is_call_with_script_state,
        'is_check_security_for_frame': is_check_security_for_frame,
        'is_check_security_for_node': is_check_security_for_node,
        'is_custom': 'Custom' in extended_attributes,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_do_not_check_security': 'DoNotCheckSecurity' in extended_attributes,
        'is_do_not_check_signature': 'DoNotCheckSignature' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_raises_exception': is_raises_exception,
        'is_read_only': 'ReadOnly' in extended_attributes,
        'is_static': is_static,
        'is_strict_type_checking':
            'StrictTypeChecking' in extended_attributes or
            'StrictTypeChecking' in interface.extended_attributes,
        'is_variadic': arguments and arguments[-1].is_variadic,
        'measure_as': v8_utilities.measure_as(method),  # [MeasureAs]
        'name': name,
        'number_of_arguments': len(arguments),
        'number_of_required_arguments': len([
            argument for argument in arguments
            if not (argument.is_optional or argument.is_variadic)]),
        'number_of_required_or_variadic_arguments': len([
            argument for argument in arguments
            if not argument.is_optional]),
        'per_context_enabled_function': v8_utilities.per_context_enabled_function_name(method),  # [PerContextEnabled]
        'property_attributes': property_attributes(method),
        'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
        'signature': 'v8::Local<v8::Signature>()' if is_static or 'DoNotCheckSignature' in extended_attributes else 'defaultSignature',
        'union_arguments': union_arguments(idl_type),
        'v8_set_return_value_for_main_world': v8_set_return_value(interface.name, method, this_cpp_value, for_main_world=True),
        'v8_set_return_value': v8_set_return_value(interface.name, method, this_cpp_value),
        'world_suffixes': ['', 'ForMainWorld'] if 'PerWorldBindings' in extended_attributes else [''],  # [PerWorldBindings]
    }

def generate_attribute(interface, attribute):
    idl_type = attribute.idl_type
    base_idl_type = idl_type.base_type
    extended_attributes = attribute.extended_attributes

    idl_type.add_includes_for_type()

    # [CheckSecurity]
    is_check_security_for_node = 'CheckSecurity' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/v8/BindingSecurity.h')
    # [Custom]
    has_custom_getter = ('Custom' in extended_attributes and
                         extended_attributes['Custom'] in [None, 'Getter'])
    has_custom_setter = (not attribute.is_read_only and
                         'Custom' in extended_attributes and
                         extended_attributes['Custom'] in [None, 'Setter'])
    # [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('core/dom/custom/CustomElementCallbackDispatcher.h')
    # [RaisesException], [RaisesException=Setter]
    is_setter_raises_exception = (
        'RaisesException' in extended_attributes and
        extended_attributes['RaisesException'] in [None, 'Setter'])
    # [StrictTypeChecking]
    has_strict_type_checking = (
        ('StrictTypeChecking' in extended_attributes or
         'StrictTypeChecking' in interface.extended_attributes) and
        idl_type.is_wrapper_type)

    if (base_idl_type == 'EventHandler' and
        interface.name in ['Window', 'WorkerGlobalScope'] and
        attribute.name == 'onerror'):
        includes.add('bindings/v8/V8ErrorHandler.h')

    contents = {
        'access_control_list': access_control_list(attribute),
        'activity_logging_world_list_for_getter': v8_utilities.activity_logging_world_list(attribute, 'Getter'),  # [ActivityLogging]
        'activity_logging_world_list_for_setter': v8_utilities.activity_logging_world_list(attribute, 'Setter'),  # [ActivityLogging]
        'cached_attribute_validation_method': extended_attributes.get('CachedAttribute'),
        'conditional_string': v8_utilities.conditional_string(attribute),
        'constructor_type': idl_type.constructor_type_name
                            if is_constructor_attribute(attribute) else None,
        'cpp_name': cpp_name(attribute),
        'cpp_type': idl_type.cpp_type,
        'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        'enum_validation_expression': idl_type.enum_validation_expression,
        'has_custom_getter': has_custom_getter,
        'has_custom_setter': has_custom_setter,
        'has_strict_type_checking': has_strict_type_checking,
        '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_new_script_state': v8_utilities.has_extended_attribute_value(attribute, 'CallWith', 'NewScriptState'),
        'is_check_security_for_node': is_check_security_for_node,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_expose_js_accessors': 'ExposeJSAccessors' in extended_attributes,
        'is_getter_raises_exception': (  # [RaisesException]
            'RaisesException' in extended_attributes and
            extended_attributes['RaisesException'] in [None, 'Getter']),
        'is_initialized_by_event_constructor':
            'InitializedByEventConstructor' in extended_attributes,
        'is_keep_alive_for_gc': is_keep_alive_for_gc(interface, attribute),
        'is_nullable': attribute.idl_type.is_nullable,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_read_only': attribute.is_read_only,
        'is_reflect': is_reflect,
        'is_replaceable': 'Replaceable' in attribute.extended_attributes,
        'is_setter_call_with_execution_context': v8_utilities.has_extended_attribute_value(attribute, 'SetterCallWith', 'ExecutionContext'),
        'is_setter_raises_exception': is_setter_raises_exception,
        'has_setter_exception_state': (
            is_setter_raises_exception or has_strict_type_checking or
            idl_type.is_integer_type),
        'is_static': attribute.is_static,
        'is_url': 'URL' in extended_attributes,
        'is_unforgeable': 'Unforgeable' in extended_attributes,
        'measure_as': v8_utilities.measure_as(attribute),  # [MeasureAs]
        'name': attribute.name,
        'per_context_enabled_function': v8_utilities.per_context_enabled_function_name(attribute),  # [PerContextEnabled]
        'property_attributes': property_attributes(attribute),
        '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_attributes['ReflectOnly'].split('|')
            if 'ReflectOnly' in extended_attributes else None,
        'setter_callback': setter_callback_name(interface, attribute),
        'v8_type': v8_types.v8_type(base_idl_type),
        'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
        'world_suffixes': ['', 'ForMainWorld']
                          if 'PerWorldBindings' in extended_attributes
                          else [''],  # [PerWorldBindings]
    }

    if is_constructor_attribute(attribute):
        generate_constructor_getter(interface, attribute, contents)
        return contents
#.........这里部分代码省略.........

def generate_method(interface, method):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name

    this_cpp_value = cpp_value(interface, method, len(arguments))
    this_custom_signature = custom_signature(method, arguments)

    def function_template():
        # FIXME: Rename as follows (also in v8/V8DOMConfiguration):
        # desc => functionTemplate
        # instance => instanceTemplate
        # proto => prototypeTemplate
        if is_static:
            return 'desc'
        if 'Unforgeable' in extended_attributes:
            return 'instance'
        return 'proto'

    def signature():
        if this_custom_signature:
            return name + 'Signature'
        if is_static or 'DoNotCheckSignature' in extended_attributes:
            return 'v8::Local<v8::Signature>()'
        return 'defaultSignature'

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/v8/ScriptCallStackFactory.h',
                         'core/inspector/ScriptArguments.h'])
    is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
    if is_call_with_script_state:
        includes.add('bindings/v8/ScriptState.h')
    is_check_security_for_node = 'CheckSecurityForNode' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/v8/BindingSecurity.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/dom/custom/CustomElementCallbackDispatcher.h')
    is_raises_exception = 'RaisesException' in extended_attributes
    if is_raises_exception:
        includes.update(['bindings/v8/ExceptionMessages.h',
                         'bindings/v8/ExceptionState.h'])

    contents = {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': [generate_argument(interface, method, argument, index)
                      for index, argument in enumerate(arguments)],
        'conditional_string': v8_utilities.conditional_string(method),
        'cpp_type': v8_types.cpp_type(idl_type),
        'cpp_value': this_cpp_value,
        'custom_signature': this_custom_signature,
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'do_not_check_signature': not(this_custom_signature or is_static or
            v8_utilities.has_extended_attribute(method,
                ['DoNotCheckSignature', 'NotEnumerable', 'ReadOnly',
                 'RuntimeEnabled', 'Unforgeable'])),
        'function_template': function_template(),
        'idl_type': idl_type,
        'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_arguments': is_call_with_script_arguments,
        'is_call_with_script_state': is_call_with_script_state,
        'is_check_security_for_node': is_check_security_for_node,
        'is_custom': 'Custom' in extended_attributes,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_raises_exception': is_raises_exception,
        'is_static': is_static,
        'measure_as': v8_utilities.measure_as(method),  # [MeasureAs]
        'name': name,
        'number_of_arguments': len(arguments),
        'number_of_required_arguments': len([
            argument for argument in arguments
            if not (argument.is_optional or argument.is_variadic)]),
        'number_of_required_or_variadic_arguments': len([
            argument for argument in arguments
            if not argument.is_optional]),
        'per_context_enabled_function_name': v8_utilities.per_context_enabled_function_name(method),  # [PerContextEnabled]
        'property_attributes': property_attributes(method),
        'runtime_enabled_function_name': v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
        'signature': signature(),
        'v8_set_return_value': v8_set_return_value(method, this_cpp_value),
        'world_suffixes': ['', 'ForMainWorld'] if 'PerWorldBindings' in extended_attributes else [''],  # [PerWorldBindings]
    }
    return contents

def method_context(interface, method):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name
    return_promise = idl_type.name == 'Promise'

    idl_type.add_includes_for_type()
    this_cpp_value = cpp_value(interface, method, len(arguments))

    def function_template():
        if is_static:
            return 'functionTemplate'
        if 'Unforgeable' in extended_attributes:
            return 'instanceTemplate'
        return 'prototypeTemplate'

    is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
    if is_implemented_in_private_script:
        includes.add('bindings/core/v8/PrivateScriptRunner.h')
        includes.add('core/frame/LocalFrame.h')
        includes.add('platform/ScriptForbiddenScope.h')

    # [OnlyExposedToPrivateScript]
    is_only_exposed_to_private_script = 'OnlyExposedToPrivateScript' in extended_attributes

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/core/v8/ScriptCallStackFactory.h',
                         'core/inspector/ScriptArguments.h'])
    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_check_security_for_node = 'CheckSecurity' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/core/v8/BindingSecurity.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/dom/custom/CustomElementCallbackDispatcher.h')

    is_check_security_for_frame = (
        'CheckSecurity' in interface.extended_attributes and
        'DoNotCheckSecurity' not in extended_attributes)
    is_raises_exception = 'RaisesException' in extended_attributes

    arguments_need_try_catch = (
        any(argument_needs_try_catch(argument, return_promise)
            for argument in arguments))

    return {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': [argument_context(interface, method, argument, index)
                      for index, argument in enumerate(arguments)],
        'argument_declarations_for_private_script':
            argument_declarations_for_private_script(interface, method),
        'arguments_need_try_catch': arguments_need_try_catch,
        'conditional_string': v8_utilities.conditional_string(method),
        'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type)
                     if idl_type.is_explicit_nullable else idl_type.cpp_type),
        'cpp_value': this_cpp_value,
        'cpp_type_initializer': idl_type.cpp_type_initializer,
        'custom_registration_extended_attributes':
            CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES.intersection(
                extended_attributes.iterkeys()),
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'exposed_test': v8_utilities.exposed(method, interface),  # [Exposed]
        'function_template': function_template(),
        'has_custom_registration': is_static or
            v8_utilities.has_extended_attribute(
                method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_frame or
            interface.name == 'EventTarget' or  # FIXME: merge with is_check_security_for_frame http://crbug.com/383699
            any(argument for argument in arguments
                if argument.idl_type.name == 'SerializedScriptValue' or
                   argument.idl_type.may_raise_exception_on_conversion),
        'idl_type': idl_type.base_type,
        'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_arguments': is_call_with_script_arguments,
        'is_call_with_script_state': is_call_with_script_state,
        'is_check_security_for_frame': is_check_security_for_frame,
        'is_check_security_for_node': is_check_security_for_node,
        'is_custom': 'Custom' in extended_attributes,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_do_not_check_security': 'DoNotCheckSecurity' in extended_attributes,
        'is_do_not_check_signature': 'DoNotCheckSignature' in extended_attributes,
        'is_explicit_nullable': idl_type.is_explicit_nullable,
        'is_implemented_in_private_script': is_implemented_in_private_script,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_raises_exception': is_raises_exception,
        'is_read_only': 'Unforgeable' in extended_attributes,
        'is_static': is_static,
        'is_variadic': arguments and arguments[-1].is_variadic,
        'measure_as': v8_utilities.measure_as(method),  # [MeasureAs]
        'name': name,
        'number_of_arguments': len(arguments),
#.........这里部分代码省略.........

def attribute_context(interface, attribute):
    idl_type = attribute.idl_type
    base_idl_type = idl_type.base_type
    extended_attributes = attribute.extended_attributes

    idl_type.add_includes_for_type()

    # [CheckSecurity]
    is_check_security_for_node = 'CheckSecurity' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/core/v8/BindingSecurity.h')
    # [Custom]
    has_custom_getter = ('Custom' in extended_attributes and
                         extended_attributes['Custom'] in [None, 'Getter'])
    has_custom_setter = (not attribute.is_read_only and
                         'Custom' in extended_attributes and
                         extended_attributes['Custom'] in [None, 'Setter'])
    # [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('core/dom/custom/CustomElementCallbackDispatcher.h')
    # [PerWorldBindings]
    if 'PerWorldBindings' in extended_attributes:
        assert idl_type.is_wrapper_type or 'LogActivity' in extended_attributes, '[PerWorldBindings] should only be used with wrapper types: %s.%s' % (interface.name, attribute.name)
    # [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'))
    # [ImplementedInPrivateScript]
    is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
    if is_implemented_in_private_script:
        includes.add('bindings/core/v8/PrivateScriptRunner.h')
        includes.add('core/frame/LocalFrame.h')

    if (base_idl_type == 'EventHandler' and
        interface.name in ['Window', 'WorkerGlobalScope'] and
        attribute.name == 'onerror'):
        includes.add('bindings/core/v8/V8ErrorHandler.h')

    # Nullable type where the corresponding C++ type supports a null value.
    is_nullable_simple = idl_type.is_nullable and (
        (idl_type.is_string_type or idl_type.is_wrapper_type) and
        not idl_type.array_or_sequence_type)

    context = {
        'access_control_list': access_control_list(attribute),
        'activity_logging_world_list_for_getter': v8_utilities.activity_logging_world_list(attribute, 'Getter'),  # [ActivityLogging]
        'activity_logging_world_list_for_setter': v8_utilities.activity_logging_world_list(attribute, 'Setter'),  # [ActivityLogging]
        'activity_logging_include_old_value_for_setter': 'LogPreviousValue' in extended_attributes,  # [ActivityLogging]
        'activity_logging_world_check': v8_utilities.activity_logging_world_check(attribute),  # [ActivityLogging]
        'argument_cpp_type': idl_type.cpp_type_args(used_as_argument=True),
        'cached_attribute_validation_method': extended_attributes.get('CachedAttribute'),
        'conditional_string': v8_utilities.conditional_string(attribute),
        'constructor_type': idl_type.constructor_type_name
                            if is_constructor_attribute(attribute) else None,
        'cpp_name': cpp_name(attribute),
        'cpp_type': idl_type.cpp_type,
        'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        'enum_validation_expression': idl_type.enum_validation_expression,
        'has_custom_getter': has_custom_getter,
        'has_custom_setter': has_custom_setter,
        'has_type_checking_unrestricted': has_type_checking_unrestricted,
        '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_check_security_for_node': is_check_security_for_node,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_expose_js_accessors': 'ExposeJSAccessors' in extended_attributes,
        'is_getter_raises_exception':  # [RaisesException]
            'RaisesException' in extended_attributes and
            extended_attributes['RaisesException'] in (None, 'Getter'),
        'is_implemented_in_private_script': is_implemented_in_private_script,
        'is_initialized_by_event_constructor':
            'InitializedByEventConstructor' in extended_attributes,
        'is_keep_alive_for_gc': is_keep_alive_for_gc(interface, attribute),
        'is_nullable': idl_type.is_nullable,
        'is_nullable_simple': is_nullable_simple,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' 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,
        'is_unforgeable': 'Unforgeable' in extended_attributes,
        'measure_as': v8_utilities.measure_as(attribute),  # [MeasureAs]
        'name': attribute.name,
        'per_context_enabled_function': v8_utilities.per_context_enabled_function_name(attribute),  # [PerContextEnabled]
        'private_script_v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
            extended_attributes, 'v8Value', 'cppValue', isolate='scriptState->isolate()', used_in_private_script=True),
        'property_attributes': property_attributes(attribute),
        '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_attributes['ReflectOnly'].split('|')
            if 'ReflectOnly' in extended_attributes else None,
#.........这里部分代码省略.........

def method_context(interface, method, is_visible=True):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name

    if is_visible:
        idl_type.add_includes_for_type(extended_attributes)

    this_cpp_value = cpp_value(interface, method, len(arguments))

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/core/v8/ScriptCallStack.h',
                         'core/inspector/ScriptArguments.h'])
    is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
    is_call_with_this_value = has_extended_attribute_value(method, 'CallWith', 'ThisValue')
    if is_call_with_script_state or is_call_with_this_value:
        includes.add('platform/bindings/ScriptState.h')

    # [CheckSecurity]
    is_cross_origin = 'CrossOrigin' in extended_attributes
    is_check_security_for_receiver = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Receiver') and
        not is_cross_origin)
    is_check_security_for_return_value = (
        has_extended_attribute_value(method, 'CheckSecurity', 'ReturnValue'))
    if is_check_security_for_receiver or is_check_security_for_return_value:
        includes.add('bindings/core/v8/BindingSecurity.h')

    is_ce_reactions = 'CEReactions' in extended_attributes
    if is_ce_reactions:
        includes.add('core/html/custom/CEReactionsScope.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/html/custom/V0CustomElementProcessingStack.h')

    is_raises_exception = 'RaisesException' in extended_attributes
    is_custom_call_prologue = has_extended_attribute_value(method, 'Custom', 'CallPrologue')
    is_custom_call_epilogue = has_extended_attribute_value(method, 'Custom', 'CallEpilogue')
    is_post_message = 'PostMessage' in extended_attributes
    if is_post_message:
        includes.add('bindings/core/v8/serialization/SerializedScriptValueFactory.h')
        includes.add('bindings/core/v8/serialization/Transferables.h')
        includes.add('core/typed_arrays/DOMArrayBufferBase.h')
        includes.add('core/imagebitmap/ImageBitmap.h')

    if 'LenientThis' in extended_attributes:
        raise Exception('[LenientThis] is not supported for operations.')

    argument_contexts = [
        argument_context(interface, method, argument, index, is_visible=is_visible)
        for index, argument in enumerate(arguments)]

    return {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': argument_contexts,
        'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type)
                     if idl_type.is_explicit_nullable else idl_type.cpp_type),
        'cpp_value': this_cpp_value,
        'cpp_type_initializer': idl_type.cpp_type_initializer,
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'do_not_test_new_object': 'DoNotTestNewObject' in extended_attributes,
        'exposed_test': v8_utilities.exposed(method, interface),  # [Exposed]
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_receiver or
            any(argument for argument in arguments
                if (argument.idl_typ