Beispiel #1
0
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_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')
    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('bindings/core/v8/ScriptState.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(method, 'CheckSecurity', 'ReturnValue'))
    if is_check_security_for_receiver or is_check_security_for_return_value:
        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/CustomElementProcessingStack.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/SerializedScriptValueFactory.h')
        includes.add('core/dom/DOMArrayBuffer.h')
        includes.add('core/dom/MessagePort.h')
        includes.add('core/frame/ImageBitmap.h')

    conditional_string = v8_utilities.conditional_string(method)
    if conditional_string:
        includes.add('wtf/build_config.h')

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

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

    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]
        'api_experiment_enabled': v8_utilities.api_experiment_enabled_function(method),  # [APIExperimentEnabled]
        'api_experiment_enabled_per_interface': v8_utilities.api_experiment_enabled_function(interface),  # [APIExperimentEnabled]
        'arguments': argument_contexts,
        'argument_declarations_for_private_script':
            argument_declarations_for_private_script(interface, method),
        'conditional_string': conditional_string,
        '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]
        # TODO(yukishiino): Retire has_custom_registration flag.  Should be
        # replaced with V8DOMConfiguration::PropertyLocationConfiguration.
        'has_custom_registration':
            v8_utilities.has_extended_attribute(
                method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_receiver or
            any(argument for argument in arguments
                if (argument.idl_type.name == 'SerializedScriptValue' or
                    argument_conversion_needs_exception_state(method, argument))),
        'has_optional_argument_without_default_value':
            any(True for argument_context in argument_contexts
                if argument_context['is_optional_without_default_value']),
        'idl_type': idl_type.base_type,
        'is_api_experiment_enabled': v8_utilities.api_experiment_enabled_function(method) or v8_utilities.api_experiment_enabled_function(interface),  # [APIExperimentEnabled]
        '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_call_with_this_value': is_call_with_this_value,
        'is_check_security_for_receiver': is_check_security_for_receiver,
        'is_check_security_for_return_value': is_check_security_for_return_value,
        'is_custom': 'Custom' in extended_attributes and
            not (is_custom_call_prologue or is_custom_call_epilogue),
        'is_custom_call_prologue': is_custom_call_prologue,
        'is_custom_call_epilogue': is_custom_call_epilogue,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_do_not_check_security': is_do_not_check_security,
        '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_post_message': is_post_message,
        'is_raises_exception': is_raises_exception,
        'is_static': is_static,
        'is_unforgeable': is_unforgeable(interface, method),
        'is_variadic': arguments and arguments[-1].is_variadic,
        'measure_as': v8_utilities.measure_as(method, interface),  # [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]),
        'on_instance': v8_utilities.on_instance(interface, method),
        'on_interface': v8_utilities.on_interface(interface, method),
        'on_prototype': v8_utilities.on_prototype(interface, method),
        'only_exposed_to_private_script': is_only_exposed_to_private_script,
        'private_script_v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
            extended_attributes, 'v8Value', 'cppValue', isolate='scriptState->isolate()', bailout_return_value='false'),
        'property_attributes': property_attributes(interface, method),
        'returns_promise': method.returns_promise,
        'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
        'should_be_exposed_to_script': not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        'use_output_parameter_for_result': idl_type.use_output_parameter_for_result,
        'use_local_result': use_local_result(method),
        'v8_set_return_value': v8_set_return_value(interface.name, method, this_cpp_value),
        'v8_set_return_value_for_main_world': v8_set_return_value(interface.name, method, this_cpp_value, for_main_world=True),
        'visible': is_visible,
        'world_suffixes': ['', 'ForMainWorld'] if 'PerWorldBindings' in extended_attributes else [''],  # [PerWorldBindings],
    }
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]
        and extended_attributes["RaisesException"] in (None, "Getter"),
        "is_implemented_in_private_script": is_implemented_in_private_script,
        "is_keep_alive_for_gc": keep_alive_for_gc,
        "is_lenient_this": "LenientThis" in extended_attributes,
        "is_nullable": idl_type.is_nullable,
        "is_explicit_nullable": idl_type.is_explicit_nullable,
        "is_partial_interface_member": "PartialInterfaceImplementedAs" in extended_attributes,
        "is_per_world_bindings": "PerWorldBindings" in extended_attributes,
        "is_put_forwards": "PutForwards" 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": is_unforgeable(interface, attribute),
        "on_instance": v8_utilities.on_instance(interface, attribute),
        "on_interface": v8_utilities.on_interface(interface, attribute),
        "on_prototype": v8_utilities.on_prototype(interface, attribute),
        "use_output_parameter_for_result": idl_type.use_output_parameter_for_result,
        "measure_as": v8_utilities.measure_as(attribute, interface),  # [MeasureAs]
        "name": attribute.name,
        "only_exposed_to_private_script": is_only_exposed_to_private_script,
        "private_script_v8_value_to_local_cpp_value": idl_type.v8_value_to_local_cpp_value(
            extended_attributes, "v8Value", "cppValue", bailout_return_value="false", isolate="scriptState->isolate()"
        ),
        "property_attributes": property_attributes(interface, attribute),
        "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"),
        "runtime_enabled_function": v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
        "should_be_exposed_to_script": not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        "world_suffixes": ["", "ForMainWorld"]
        if "PerWorldBindings" in extended_attributes
        else [""],  # [PerWorldBindings]
    }

    if is_constructor_attribute(attribute):
        update_constructor_attribute_context(interface, attribute, context)
    if not has_custom_getter(attribute):
        getter_context(interface, attribute, context)
    if not has_custom_setter(attribute) and has_setter(attribute):
        setter_context(interface, attribute, context)

    return context
Beispiel #3
0
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')

    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,
        '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]
            'RaisesException' in extended_attributes and
            extended_attributes['RaisesException'] in (None, 'Getter'),
        'is_implemented_in_private_script': is_implemented_in_private_script,
        'is_keep_alive_for_gc': keep_alive_for_gc,
        'is_lenient_this': 'LenientThis' in extended_attributes,
        'is_nullable': idl_type.is_nullable,
        'is_explicit_nullable': idl_type.is_explicit_nullable,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_put_forwards': 'PutForwards' 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': is_unforgeable(interface, attribute),
        'on_instance': v8_utilities.on_instance(interface, attribute),
        'on_interface': v8_utilities.on_interface(interface, attribute),
        'on_prototype': v8_utilities.on_prototype(interface, attribute),
        'use_output_parameter_for_result': idl_type.use_output_parameter_for_result,
        'measure_as': v8_utilities.measure_as(attribute, interface),  # [MeasureAs]
        'name': attribute.name,
        'only_exposed_to_private_script': is_only_exposed_to_private_script,
        'private_script_v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
            extended_attributes, 'v8Value', 'cppValue', bailout_return_value='false', isolate='scriptState->isolate()'),
        'property_attributes': property_attributes(interface, attribute),
        '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'),
        'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
        'should_be_exposed_to_script': not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        'world_suffixes': ['', 'ForMainWorld']
                          if 'PerWorldBindings' in extended_attributes
                          else [''],  # [PerWorldBindings]
    }

    if is_constructor_attribute(attribute):
        update_constructor_attribute_context(interface, attribute, context)
    if not has_custom_getter(attribute):
        getter_context(interface, attribute, context)
    if not has_custom_setter(attribute) and has_setter(attribute):
        setter_context(interface, attribute, context)

    return context
Beispiel #4
0
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_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')
    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('bindings/core/v8/ScriptState.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(
        method, 'CheckSecurity', 'ReturnValue'))
    if is_check_security_for_receiver or is_check_security_for_return_value:
        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/CustomElementProcessingStack.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/SerializedScriptValueFactory.h')
        includes.add('core/dom/DOMArrayBuffer.h')
        includes.add('core/dom/MessagePort.h')
        includes.add('core/frame/ImageBitmap.h')

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

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

    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]
        'api_experiment_enabled':
        v8_utilities.api_experiment_enabled_function(
            method),  # [APIExperimentEnabled]
        'api_experiment_enabled_per_interface':
        v8_utilities.api_experiment_enabled_function(
            interface),  # [APIExperimentEnabled]
        'arguments':
        argument_contexts,
        'argument_declarations_for_private_script':
        argument_declarations_for_private_script(interface, 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]
        # TODO(yukishiino): Retire has_custom_registration flag.  Should be
        # replaced with V8DOMConfiguration::PropertyLocationConfiguration.
        'has_custom_registration':
        v8_utilities.has_extended_attribute(
            method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
        'has_exception_state':
        is_raises_exception or is_check_security_for_receiver
        or any(argument for argument in arguments if (
            argument.idl_type.name == 'SerializedScriptValue'
            or argument_conversion_needs_exception_state(method, argument))),
        'has_optional_argument_without_default_value':
        any(True for argument_context in argument_contexts
            if argument_context['is_optional_without_default_value']),
        'idl_type':
        idl_type.base_type,
        'is_api_experiment_enabled':
        v8_utilities.api_experiment_enabled_function(method)
        or v8_utilities.api_experiment_enabled_function(
            interface),  # [APIExperimentEnabled]
        '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_call_with_this_value':
        is_call_with_this_value,
        'is_check_security_for_receiver':
        is_check_security_for_receiver,
        'is_check_security_for_return_value':
        is_check_security_for_return_value,
        'is_custom':
        'Custom' in extended_attributes
        and not (is_custom_call_prologue or is_custom_call_epilogue),
        'is_custom_call_prologue':
        is_custom_call_prologue,
        'is_custom_call_epilogue':
        is_custom_call_epilogue,
        'is_custom_element_callbacks':
        is_custom_element_callbacks,
        'is_do_not_check_security':
        is_do_not_check_security,
        '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_post_message':
        is_post_message,
        'is_raises_exception':
        is_raises_exception,
        'is_static':
        is_static,
        'is_unforgeable':
        is_unforgeable(interface, method),
        'is_variadic':
        arguments and arguments[-1].is_variadic,
        'measure_as':
        v8_utilities.measure_as(method, interface),  # [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]),
        'on_instance':
        v8_utilities.on_instance(interface, method),
        'on_interface':
        v8_utilities.on_interface(interface, method),
        'on_prototype':
        v8_utilities.on_prototype(interface, method),
        'only_exposed_to_private_script':
        is_only_exposed_to_private_script,
        'private_script_v8_value_to_local_cpp_value':
        idl_type.v8_value_to_local_cpp_value(extended_attributes,
                                             'v8Value',
                                             'cppValue',
                                             isolate='scriptState->isolate()',
                                             bailout_return_value='false'),
        'property_attributes':
        property_attributes(interface, method),
        'returns_promise':
        method.returns_promise,
        'runtime_enabled_function':
        v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
        'should_be_exposed_to_script':
        not (is_implemented_in_private_script
             and is_only_exposed_to_private_script),
        'use_output_parameter_for_result':
        idl_type.use_output_parameter_for_result,
        'use_local_result':
        use_local_result(method),
        'v8_set_return_value':
        v8_set_return_value(interface.name, method, this_cpp_value),
        'v8_set_return_value_for_main_world':
        v8_set_return_value(interface.name,
                            method,
                            this_cpp_value,
                            for_main_world=True),
        'visible':
        is_visible,
        'world_suffixes': ['', 'ForMainWorld'] if 'PerWorldBindings'
        in extended_attributes else [''],  # [PerWorldBindings],
    }
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')

    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,
        '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]
            'RaisesException' in extended_attributes and
            extended_attributes['RaisesException'] in (None, 'Getter'),
        'is_implemented_in_private_script': is_implemented_in_private_script,
        'is_keep_alive_for_gc': keep_alive_for_gc,
        'is_lenient_this': 'LenientThis' in extended_attributes,
        'is_nullable': idl_type.is_nullable,
        'is_explicit_nullable': idl_type.is_explicit_nullable,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_put_forwards': 'PutForwards' 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': is_unforgeable(interface, attribute),
        'on_instance': v8_utilities.on_instance(interface, attribute),
        'on_interface': v8_utilities.on_interface(interface, attribute),
        'on_prototype': v8_utilities.on_prototype(interface, attribute),
        'use_output_parameter_for_result': idl_type.use_output_parameter_for_result,
        'measure_as': v8_utilities.measure_as(attribute, interface),  # [MeasureAs]
        'name': attribute.name,
        'only_exposed_to_private_script': is_only_exposed_to_private_script,
        'private_script_v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
            extended_attributes, 'v8Value', 'cppValue', bailout_return_value='false', isolate='scriptState->isolate()'),
        'property_attributes': property_attributes(interface, attribute),
        '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'),
        'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
        'should_be_exposed_to_script': not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        'world_suffixes': ['', 'ForMainWorld']
                          if 'PerWorldBindings' in extended_attributes
                          else [''],  # [PerWorldBindings]
    }

    if is_constructor_attribute(attribute):
        update_constructor_attribute_context(interface, attribute, context)
    if not has_custom_getter(attribute):
        getter_context(interface, attribute, context)
    if not has_custom_setter(attribute) and has_setter(attribute):
        setter_context(interface, attribute, context)

    return context