src/third_party/blink/Source/bindings/templates/attributes.cpp - cobalt - Git at Google

 {##############################################################################}
 {% macro attribute_getter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeGetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 const v8::PropertyCallbackInfo<v8::Value>& info
 {%- endif %})
 {
     {% if attribute.is_reflect and not attribute.is_url
           and attribute.idl_type == 'DOMString' and is_node
           and not attribute.is_implemented_in_private_script %}
     {% set cpp_class, v8_class = 'Element', 'V8Element' %}
     {% endif %}
     {# holder #}
     {% if not attribute.is_static %}
     v8::Handle<v8::Object> holder = info.Holder();
     {% endif %}
     {# impl #}
     {% if attribute.cached_attribute_validation_method %}
     v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "{{attribute.name}}");
     {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
     if (!impl->{{attribute.cached_attribute_validation_method}}()) {
         v8::Handle<v8::Value> v8Value = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
         if (!v8Value.IsEmpty()) {
             v8SetReturnValue(info, v8Value);
             return;
         }
     }
     {% elif not attribute.is_static %}
     {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
     {% endif %}
     {% if interface_name == 'Window' and attribute.idl_type == 'EventHandler' %}
     if (!impl->document())
         return;
     {% endif %}
     {# Local variables #}
     {% if attribute.is_call_with_execution_context %}
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     {% endif %}
     {% if attribute.is_call_with_script_state %}
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     {% endif %}
     {% if attribute.is_check_security_for_node or
           attribute.is_getter_raises_exception %}
     ExceptionState exceptionState(ExceptionState::GetterContext, "{{attribute.name}}", "{{interface_name}}", holder, info.GetIsolate());
     {% endif %}
     {% if attribute.is_explicit_nullable %}
     bool isNull = false;
     {% endif %}
     {% if attribute.is_implemented_in_private_script %}
     {{attribute.cpp_type}} result{{attribute.cpp_type_initializer}};
     if (!{{attribute.cpp_value_original}})
         return;
     {% elif attribute.cpp_value_original %}
     {{attribute.cpp_type}} {{attribute.cpp_value}}({{attribute.cpp_value_original}});
     {% endif %}
     {# Checks #}
     {% if attribute.is_getter_raises_exception %}
     if (UNLIKELY(exceptionState.throwIfNeeded()))
         return;
     {% endif %}
     {% if attribute.is_check_security_for_node %}
     if (!BindingSecurity::shouldAllowAccessToNode(info.GetIsolate(), {{attribute.cpp_value}}, exceptionState)) {
         v8SetReturnValueNull(info);
         exceptionState.throwIfNeeded();
         return;
     }
     {% endif %}
     {% if attribute.reflect_only %}
     {{release_only_check(attribute.reflect_only, attribute.reflect_missing,
                          attribute.reflect_invalid, attribute.reflect_empty,
                          attribute.cpp_value)
       | indent}}
     {% endif %}
     {% if attribute.is_explicit_nullable %}
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     {% endif %}
     {% if attribute.cached_attribute_validation_method %}
     V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, {{attribute.cpp_value_to_v8_value}});
     {% endif %}
     {# v8SetReturnValue #}
     {% if attribute.is_keep_alive_for_gc %}
     if ({{attribute.cpp_value}} && DOMDataStore::setReturnValueFromWrapper{{world_suffix}}<V8{{attribute.idl_type}}>(info.GetReturnValue(), {{attribute.cpp_value}}.get()))
         return;
     v8::Handle<v8::Value> wrapper = toV8({{attribute.cpp_value}}.get(), holder, info.GetIsolate());
     if (!wrapper.IsEmpty()) {
         V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "{{attribute.name}}"), wrapper);
         {{attribute.v8_set_return_value}};
     }
     {% elif world_suffix %}
     {{attribute.v8_set_return_value_for_main_world}};
     {% else %}
     {{attribute.v8_set_return_value}};
     {% endif %}
 }
 {% endfilter %}
 {% endmacro %}

 {######################################}
 {% macro release_only_check(reflect_only_values, reflect_missing,
                             reflect_invalid, reflect_empty, cpp_value) %}
 {# Attribute is limited to only known values: check that the attribute value is
    one of those. If not, set it to the empty string.
    http://www.whatwg.org/specs/web-apps/current-work/#limited-to-only-known-values #}
 {% if reflect_empty %}
 if ({{cpp_value}}.isNull()) {
 {% if reflect_missing %}
     {{cpp_value}} = "{{reflect_missing}}";
 {% else %}
     ;
 {% endif %}
 } else if ({{cpp_value}}.isEmpty()) {
     {{cpp_value}} = "{{reflect_empty}}";
 {% else %}
 if ({{cpp_value}}.isEmpty()) {
 {# FIXME: should use [ReflectEmpty] instead; need to change IDL files #}
 {% if reflect_missing %}
     {{cpp_value}} = "{{reflect_missing}}";
 {% else %}
     ;
 {% endif %}
 {% endif %}
 {% for value in reflect_only_values %}
 } else if (equalIgnoringCase({{cpp_value}}, "{{value}}")) {
     {{cpp_value}} = "{{value}}";
 {% endfor %}
 } else {
     {{cpp_value}} = "{{reflect_invalid}}";
 }
 {% endmacro %}


 {##############################################################################}
 {% macro attribute_getter_callback(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeGetterCallback{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info
 {%- endif %})
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     {% if attribute.deprecate_as %}
     UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
     {% endif %}
     {% if attribute.measure_as %}
     UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
     {% endif %}
     {% if world_suffix in attribute.activity_logging_world_list_for_getter %}
     ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
     V8PerContextData* contextData = scriptState->perContextData();
     {% if attribute.activity_logging_world_check %}
     if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger())
     {% else %}
     if (contextData && contextData->activityLogger())
     {% endif %}
         contextData->activityLogger()->logGetter("{{interface_name}}.{{attribute.name}}");
     {% endif %}
     {% if attribute.has_custom_getter %}
     {{v8_class}}::{{attribute.name}}AttributeGetterCustom(info);
     {% else %}
     {{cpp_class_or_partial}}V8Internal::{{attribute.name}}AttributeGetter{{world_suffix}}(info);
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}


 {##############################################################################}
 {% macro constructor_getter_callback(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}ConstructorGetterCallback{{world_suffix}}(v8::Local<v8::String> property, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     {% if attribute.deprecate_as %}
     UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
     {% endif %}
     {% if attribute.measure_as %}
     UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
     {% endif %}
     {{cpp_class_or_partial}}V8Internal::{{cpp_class}}ConstructorGetter{{world_suffix}}(property, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}


 {##############################################################################}
 {% macro attribute_setter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeSetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 v8::Local<v8::Value> v8Value, const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
 {%- endif %})
 {
     {% if attribute.is_reflect and attribute.idl_type == 'DOMString'
           and is_node and not attribute.is_implemented_in_private_script %}
     {% set cpp_class, v8_class = 'Element', 'V8Element' %}
     {% endif %}
     {# Local variables #}
     {% if not attribute.is_static %}
     v8::Handle<v8::Object> holder = info.Holder();
     {% endif %}
     {% if attribute.has_setter_exception_state %}
     ExceptionState exceptionState(ExceptionState::SetterContext, "{{attribute.name}}", "{{interface_name}}", holder, info.GetIsolate());
     {% endif %}
     {# Type checking #}
     {% if attribute.has_type_checking_interface %}
     {# Type checking for interface types (if interface not implemented, throw
        TypeError), per http://www.w3.org/TR/WebIDL/#es-interface #}
     if ({% if attribute.is_nullable %}!isUndefinedOrNull(v8Value) && {% endif %}!V8{{attribute.idl_type}}::hasInstance(v8Value, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type '{{attribute.idl_type}}'.");
         exceptionState.throwIfNeeded();
         return;
     }
     {% endif %}
     {# impl #}
     {% if attribute.put_forwards %}
     {{cpp_class}}* proxyImpl = {{v8_class}}::toImpl(holder);
     {{attribute.cpp_type}} impl = WTF::getPtr(proxyImpl->{{attribute.name}}());
     if (!impl)
         return;
     {% elif not attribute.is_static %}
     {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
     {% endif %}
     {% if attribute.idl_type == 'EventHandler' and interface_name == 'Window' %}
     if (!impl->document())
         return;
     {% endif %}
     {# Convert JS value to C++ value #}
     {% if attribute.idl_type != 'EventHandler' %}
     {{attribute.v8_value_to_local_cpp_value}};
     {% elif not is_node %}{# EventHandler hack #}
     moveEventListenerToNewWrapper(info.GetIsolate(), holder, {{attribute.event_handler_getter_expression}}, v8Value, {{v8_class}}::eventListenerCacheIndex);
     {% endif %}
     {# Type checking, possibly throw a TypeError, per:
        http://www.w3.org/TR/WebIDL/#es-type-mapping #}
     {% if attribute.has_type_checking_unrestricted %}
     {# Non-finite floating point values (NaN, +Infinity or −Infinity), per:
        http://heycam.github.io/webidl/#es-float
        http://heycam.github.io/webidl/#es-double #}
     if (!std::isfinite(cppValue)) {
         exceptionState.throwTypeError("The provided {{attribute.idl_type}} value is non-finite.");
         exceptionState.throwIfNeeded();
         return;
     }
     {% elif attribute.enum_validation_expression %}
     {# Setter ignores invalid enum values:
        http://www.w3.org/TR/WebIDL/#idl-enums #}
     String string = cppValue;
     if (!({{attribute.enum_validation_expression}}))
         return;
     {% endif %}
     {# Pre-set context #}
     {% if attribute.is_custom_element_callbacks or
           (attribute.is_reflect and
            not(attribute.idl_type == 'DOMString' and is_node)) %}
     {# Skip on compact node DOMString getters #}
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     {% endif %}
     {% if attribute.is_call_with_execution_context or
           attribute.is_setter_call_with_execution_context %}
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     {% endif %}
     {# Set #}
     {{attribute.cpp_setter}};
     {# Post-set #}
     {% if attribute.is_setter_raises_exception %}
     exceptionState.throwIfNeeded();
     {% endif %}
     {% if attribute.cached_attribute_validation_method %}
     V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "{{attribute.name}}")); // Invalidate the cached value.
     {% endif %}
 }
 {% endfilter %}
 {% endmacro %}


 {##############################################################################}
 {% macro attribute_setter_callback(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeSetterCallback{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
 {%- endif %})
 {
     {% if attribute.is_expose_js_accessors %}
     v8::Local<v8::Value> v8Value = info[0];
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     {% if attribute.deprecate_as %}
     UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
     {% endif %}
     {% if attribute.measure_as %}
     UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
     {% endif %}
     {% if world_suffix in attribute.activity_logging_world_list_for_setter %}
     ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
     V8PerContextData* contextData = scriptState->perContextData();
     {% if attribute.activity_logging_world_check %}
     if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger()) {
     {% else %}
     if (contextData && contextData->activityLogger()) {
     {% endif %}
         contextData->activityLogger()->logSetter("{{interface_name}}.{{attribute.name}}", v8Value);
     }
     {% endif %}
     {% if attribute.is_custom_element_callbacks or attribute.is_reflect %}
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     {% endif %}
     {% if attribute.has_custom_setter %}
     {{v8_class}}::{{attribute.name}}AttributeSetterCustom(v8Value, info);
     {% else %}
     {{cpp_class_or_partial}}V8Internal::{{attribute.name}}AttributeSetter{{world_suffix}}(v8Value, info);
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}


 {##############################################################################}
 {% macro attribute_getter_implemented_in_private_script(attribute) %}
 bool {{v8_class}}::PrivateScript::{{attribute.name}}AttributeGetter(LocalFrame* frame, {{cpp_class}}* holderImpl, {{attribute.cpp_type}}* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Handle<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;

     ScriptState::Scope scope(scriptState);
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());

     ExceptionState exceptionState(ExceptionState::GetterContext, "{{attribute.name}}", "{{cpp_class}}", scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "{{cpp_class}}", "{{attribute.name}}", holder);
     if (v8Value.IsEmpty())
         return false;
     {{attribute.private_script_v8_value_to_local_cpp_value}};
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 {% endmacro %}


 {% macro attribute_setter_implemented_in_private_script(attribute) %}
 bool {{v8_class}}::PrivateScript::{{attribute.name}}AttributeSetter(LocalFrame* frame, {{cpp_class}}* holderImpl, {{attribute.argument_cpp_type}} cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Handle<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;

     ScriptState::Scope scope(scriptState);
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());

     ExceptionState exceptionState(ExceptionState::SetterContext, "{{attribute.name}}", "{{cpp_class}}", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "{{cpp_class}}", "{{attribute.name}}", holder, {{attribute.private_script_cpp_value_to_v8_value}});
 }
 {% endmacro %}


 {##############################################################################}
 {% macro attribute_configuration(attribute) %}
 {% set getter_callback =
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class_or_partial, attribute.name)
        if not attribute.constructor_type else
        ('%sV8Internal::%sConstructorGetterCallback' %
             (cpp_class_or_partial, attribute.name)
         if attribute.needs_constructor_getter_callback else
        '%sV8Internal::%sConstructorGetter' % (cpp_class_or_partial, cpp_class)) %}
 {% set getter_callback_for_main_world =
        '%sV8Internal::%sAttributeGetterCallbackForMainWorld' %
             (cpp_class_or_partial, attribute.name)
        if attribute.is_per_world_bindings else '0' %}
 {% set setter_callback = attribute.setter_callback %}
 {% set setter_callback_for_main_world =
        '%sV8Internal::%sAttributeSetterCallbackForMainWorld' %
            (cpp_class_or_partial, attribute.name)
        if attribute.is_per_world_bindings and
           (not attribute.is_read_only or attribute.put_forwards) else '0' %}
 {% set wrapper_type_info =
        'const_cast<WrapperTypeInfo*>(&V8%s::wrapperTypeInfo)' %
             attribute.constructor_type
         if attribute.constructor_type else '0' %}
 {% set access_control = 'static_cast<v8::AccessControl>(%s)' %
                         ' | '.join(attribute.access_control_list) %}
 {% set property_attribute = 'static_cast<v8::PropertyAttribute>(%s)' %
                             ' | '.join(attribute.property_attributes) %}
 {% set only_exposed_to_private_script = 'V8DOMConfiguration::OnlyExposedToPrivateScript' if attribute.only_exposed_to_private_script else 'V8DOMConfiguration::ExposedToAllScripts' %}
 {% set on_prototype = 'V8DOMConfiguration::OnPrototype'
        if interface_name == 'Window' and attribute.idl_type == 'EventHandler'
        else 'V8DOMConfiguration::OnInstance' %}
 {% set attribute_configuration_list = [
        '"%s"' % attribute.name,
        getter_callback,
        setter_callback,
        getter_callback_for_main_world,
        setter_callback_for_main_world,
        wrapper_type_info,
        access_control,
        property_attribute,
        only_exposed_to_private_script,
    ] %}
 {% if not attribute.is_expose_js_accessors %}
 {% set attribute_configuration_list = attribute_configuration_list
                                     + [on_prototype] %}
 {% endif %}
 {{'{'}}{{attribute_configuration_list | join(', ')}}{{'}'}}
 {%- endmacro %}
	{##############################################################################}
	{% macro attribute_getter(attribute, world_suffix) %}
	{% filter conditional(attribute.conditional_string) %}
	static void {{attribute.name}}AttributeGetter{{world_suffix}}(
	{%- if attribute.is_expose_js_accessors %}
	const v8::FunctionCallbackInfo<v8::Value>& info
	{%- else %}
	const v8::PropertyCallbackInfo<v8::Value>& info
	{%- endif %})
	{
	{% if attribute.is_reflect and not attribute.is_url
	and attribute.idl_type == 'DOMString' and is_node
	and not attribute.is_implemented_in_private_script %}
	{% set cpp_class, v8_class = 'Element', 'V8Element' %}
	{% endif %}
	{# holder #}
	{% if not attribute.is_static %}
	v8::Handle<v8::Object> holder = info.Holder();
	{% endif %}
	{# impl #}
	{% if attribute.cached_attribute_validation_method %}
	v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "{{attribute.name}}");
	{{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
	if (!impl->{{attribute.cached_attribute_validation_method}}()) {
	v8::Handle<v8::Value> v8Value = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
	if (!v8Value.IsEmpty()) {
	v8SetReturnValue(info, v8Value);
	return;
	}
	}
	{% elif not attribute.is_static %}
	{{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
	{% endif %}
	{% if interface_name == 'Window' and attribute.idl_type == 'EventHandler' %}
	if (!impl->document())
	return;
	{% endif %}
	{# Local variables #}
	{% if attribute.is_call_with_execution_context %}
	ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
	{% endif %}
	{% if attribute.is_call_with_script_state %}
	ScriptState* scriptState = ScriptState::current(info.GetIsolate());
	{% endif %}
	{% if attribute.is_check_security_for_node or
	attribute.is_getter_raises_exception %}
	ExceptionState exceptionState(ExceptionState::GetterContext, "{{attribute.name}}", "{{interface_name}}", holder, info.GetIsolate());
	{% endif %}
	{% if attribute.is_explicit_nullable %}
	bool isNull = false;
	{% endif %}
	{% if attribute.is_implemented_in_private_script %}
	{{attribute.cpp_type}} result{{attribute.cpp_type_initializer}};
	if (!{{attribute.cpp_value_original}})
	return;
	{% elif attribute.cpp_value_original %}
	{{attribute.cpp_type}} {{attribute.cpp_value}}({{attribute.cpp_value_original}});
	{% endif %}
	{# Checks #}
	{% if attribute.is_getter_raises_exception %}
	if (UNLIKELY(exceptionState.throwIfNeeded()))
	return;
	{% endif %}
	{% if attribute.is_check_security_for_node %}
	if (!BindingSecurity::shouldAllowAccessToNode(info.GetIsolate(), {{attribute.cpp_value}}, exceptionState)) {
	v8SetReturnValueNull(info);
	exceptionState.throwIfNeeded();
	return;
	}
	{% endif %}
	{% if attribute.reflect_only %}
	{{release_only_check(attribute.reflect_only, attribute.reflect_missing,
	attribute.reflect_invalid, attribute.reflect_empty,
	attribute.cpp_value)
	\| indent}}
	{% endif %}
	{% if attribute.is_explicit_nullable %}
	if (isNull) {
	v8SetReturnValueNull(info);
	return;
	}
	{% endif %}
	{% if attribute.cached_attribute_validation_method %}
	V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, {{attribute.cpp_value_to_v8_value}});
	{% endif %}
	{# v8SetReturnValue #}
	{% if attribute.is_keep_alive_for_gc %}
	if ({{attribute.cpp_value}} && DOMDataStore::setReturnValueFromWrapper{{world_suffix}}<V8{{attribute.idl_type}}>(info.GetReturnValue(), {{attribute.cpp_value}}.get()))
	return;
	v8::Handle<v8::Value> wrapper = toV8({{attribute.cpp_value}}.get(), holder, info.GetIsolate());
	if (!wrapper.IsEmpty()) {
	V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "{{attribute.name}}"), wrapper);
	{{attribute.v8_set_return_value}};
	}
	{% elif world_suffix %}
	{{attribute.v8_set_return_value_for_main_world}};
	{% else %}
	{{attribute.v8_set_return_value}};
	{% endif %}
	}
	{% endfilter %}
	{% endmacro %}

	{######################################}
	{% macro release_only_check(reflect_only_values, reflect_missing,
	reflect_invalid, reflect_empty, cpp_value) %}
	{# Attribute is limited to only known values: check that the attribute value is
	one of those. If not, set it to the empty string.
	http://www.whatwg.org/specs/web-apps/current-work/#limited-to-only-known-values #}
	{% if reflect_empty %}
	if ({{cpp_value}}.isNull()) {
	{% if reflect_missing %}
	{{cpp_value}} = "{{reflect_missing}}";
	{% else %}
	;
	{% endif %}
	} else if ({{cpp_value}}.isEmpty()) {
	{{cpp_value}} = "{{reflect_empty}}";
	{% else %}
	if ({{cpp_value}}.isEmpty()) {
	{# FIXME: should use [ReflectEmpty] instead; need to change IDL files #}
	{% if reflect_missing %}
	{{cpp_value}} = "{{reflect_missing}}";
	{% else %}
	;
	{% endif %}
	{% endif %}
	{% for value in reflect_only_values %}
	} else if (equalIgnoringCase({{cpp_value}}, "{{value}}")) {
	{{cpp_value}} = "{{value}}";
	{% endfor %}
	} else {
	{{cpp_value}} = "{{reflect_invalid}}";
	}
	{% endmacro %}


	{##############################################################################}
	{% macro attribute_getter_callback(attribute, world_suffix) %}
	{% filter conditional(attribute.conditional_string) %}
	static void {{attribute.name}}AttributeGetterCallback{{world_suffix}}(
	{%- if attribute.is_expose_js_accessors %}
	const v8::FunctionCallbackInfo<v8::Value>& info
	{%- else %}
	v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info
	{%- endif %})
	{
	TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
	{% if attribute.deprecate_as %}
	UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
	{% endif %}
	{% if attribute.measure_as %}
	UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
	{% endif %}
	{% if world_suffix in attribute.activity_logging_world_list_for_getter %}
	ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
	V8PerContextData* contextData = scriptState->perContextData();
	{% if attribute.activity_logging_world_check %}
	if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger())
	{% else %}
	if (contextData && contextData->activityLogger())
	{% endif %}
	contextData->activityLogger()->logGetter("{{interface_name}}.{{attribute.name}}");
	{% endif %}
	{% if attribute.has_custom_getter %}
	{{v8_class}}::{{attribute.name}}AttributeGetterCustom(info);
	{% else %}
	{{cpp_class_or_partial}}V8Internal::{{attribute.name}}AttributeGetter{{world_suffix}}(info);
	{% endif %}
	TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
	}
	{% endfilter %}
	{% endmacro %}


	{##############################################################################}
	{% macro constructor_getter_callback(attribute, world_suffix) %}
	{% filter conditional(attribute.conditional_string) %}
	static void {{attribute.name}}ConstructorGetterCallback{{world_suffix}}(v8::Local<v8::String> property, const v8::PropertyCallbackInfo<v8::Value>& info)
	{
	TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
	{% if attribute.deprecate_as %}
	UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
	{% endif %}
	{% if attribute.measure_as %}
	UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
	{% endif %}
	{{cpp_class_or_partial}}V8Internal::{{cpp_class}}ConstructorGetter{{world_suffix}}(property, info);
	TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
	}
	{% endfilter %}
	{% endmacro %}


	{##############################################################################}
	{% macro attribute_setter(attribute, world_suffix) %}
	{% filter conditional(attribute.conditional_string) %}
	static void {{attribute.name}}AttributeSetter{{world_suffix}}(
	{%- if attribute.is_expose_js_accessors %}
	v8::Local<v8::Value> v8Value, const v8::FunctionCallbackInfo<v8::Value>& info
	{%- else %}
	v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
	{%- endif %})
	{
	{% if attribute.is_reflect and attribute.idl_type == 'DOMString'
	and is_node and not attribute.is_implemented_in_private_script %}
	{% set cpp_class, v8_class = 'Element', 'V8Element' %}
	{% endif %}
	{# Local variables #}
	{% if not attribute.is_static %}
	v8::Handle<v8::Object> holder = info.Holder();
	{% endif %}
	{% if attribute.has_setter_exception_state %}
	ExceptionState exceptionState(ExceptionState::SetterContext, "{{attribute.name}}", "{{interface_name}}", holder, info.GetIsolate());
	{% endif %}
	{# Type checking #}
	{% if attribute.has_type_checking_interface %}
	{# Type checking for interface types (if interface not implemented, throw
	TypeError), per http://www.w3.org/TR/WebIDL/#es-interface #}
	if ({% if attribute.is_nullable %}!isUndefinedOrNull(v8Value) && {% endif %}!V8{{attribute.idl_type}}::hasInstance(v8Value, info.GetIsolate())) {
	exceptionState.throwTypeError("The provided value is not of type '{{attribute.idl_type}}'.");
	exceptionState.throwIfNeeded();
	return;
	}
	{% endif %}
	{# impl #}
	{% if attribute.put_forwards %}
	{{cpp_class}}* proxyImpl = {{v8_class}}::toImpl(holder);
	{{attribute.cpp_type}} impl = WTF::getPtr(proxyImpl->{{attribute.name}}());
	if (!impl)
	return;
	{% elif not attribute.is_static %}
	{{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
	{% endif %}
	{% if attribute.idl_type == 'EventHandler' and interface_name == 'Window' %}
	if (!impl->document())
	return;
	{% endif %}
	{# Convert JS value to C++ value #}
	{% if attribute.idl_type != 'EventHandler' %}
	{{attribute.v8_value_to_local_cpp_value}};
	{% elif not is_node %}{# EventHandler hack #}
	moveEventListenerToNewWrapper(info.GetIsolate(), holder, {{attribute.event_handler_getter_expression}}, v8Value, {{v8_class}}::eventListenerCacheIndex);
	{% endif %}
	{# Type checking, possibly throw a TypeError, per:
	http://www.w3.org/TR/WebIDL/#es-type-mapping #}
	{% if attribute.has_type_checking_unrestricted %}
	{# Non-finite floating point values (NaN, +Infinity or −Infinity), per:
	http://heycam.github.io/webidl/#es-float
	http://heycam.github.io/webidl/#es-double #}
	if (!std::isfinite(cppValue)) {
	exceptionState.throwTypeError("The provided {{attribute.idl_type}} value is non-finite.");
	exceptionState.throwIfNeeded();
	return;
	}
	{% elif attribute.enum_validation_expression %}
	{# Setter ignores invalid enum values:
	http://www.w3.org/TR/WebIDL/#idl-enums #}
	String string = cppValue;
	if (!({{attribute.enum_validation_expression}}))
	return;
	{% endif %}
	{# Pre-set context #}
	{% if attribute.is_custom_element_callbacks or
	(attribute.is_reflect and
	not(attribute.idl_type == 'DOMString' and is_node)) %}
	{# Skip on compact node DOMString getters #}
	CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
	{% endif %}
	{% if attribute.is_call_with_execution_context or
	attribute.is_setter_call_with_execution_context %}
	ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
	{% endif %}
	{# Set #}
	{{attribute.cpp_setter}};
	{# Post-set #}
	{% if attribute.is_setter_raises_exception %}
	exceptionState.throwIfNeeded();
	{% endif %}
	{% if attribute.cached_attribute_validation_method %}
	V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "{{attribute.name}}")); // Invalidate the cached value.
	{% endif %}
	}
	{% endfilter %}
	{% endmacro %}


	{##############################################################################}
	{% macro attribute_setter_callback(attribute, world_suffix) %}
	{% filter conditional(attribute.conditional_string) %}
	static void {{attribute.name}}AttributeSetterCallback{{world_suffix}}(
	{%- if attribute.is_expose_js_accessors %}
	const v8::FunctionCallbackInfo<v8::Value>& info
	{%- else %}
	v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
	{%- endif %})
	{
	{% if attribute.is_expose_js_accessors %}
	v8::Local<v8::Value> v8Value = info[0];
	{% endif %}
	TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
	{% if attribute.deprecate_as %}
	UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
	{% endif %}
	{% if attribute.measure_as %}
	UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
	{% endif %}
	{% if world_suffix in attribute.activity_logging_world_list_for_setter %}
	ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
	V8PerContextData* contextData = scriptState->perContextData();
	{% if attribute.activity_logging_world_check %}
	if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger()) {
	{% else %}
	if (contextData && contextData->activityLogger()) {
	{% endif %}
	contextData->activityLogger()->logSetter("{{interface_name}}.{{attribute.name}}", v8Value);
	}
	{% endif %}
	{% if attribute.is_custom_element_callbacks or attribute.is_reflect %}
	CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
	{% endif %}
	{% if attribute.has_custom_setter %}
	{{v8_class}}::{{attribute.name}}AttributeSetterCustom(v8Value, info);
	{% else %}
	{{cpp_class_or_partial}}V8Internal::{{attribute.name}}AttributeSetter{{world_suffix}}(v8Value, info);
	{% endif %}
	TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
	}
	{% endfilter %}
	{% endmacro %}


	{##############################################################################}
	{% macro attribute_getter_implemented_in_private_script(attribute) %}
	bool {{v8_class}}::PrivateScript::{{attribute.name}}AttributeGetter(LocalFrame* frame, {{cpp_class}}* holderImpl, {{attribute.cpp_type}}* result)
	{
	if (!frame)
	return false;
	v8::HandleScope handleScope(toIsolate(frame));
	ScriptForbiddenScope::AllowUserAgentScript script;
	v8::Handle<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
	if (contextInPrivateScript.IsEmpty())
	return false;
	ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
	ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
	if (!scriptState->executionContext())
	return false;

	ScriptState::Scope scope(scriptState);
	v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());

	ExceptionState exceptionState(ExceptionState::GetterContext, "{{attribute.name}}", "{{cpp_class}}", scriptState->context()->Global(), scriptState->isolate());
	v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "{{cpp_class}}", "{{attribute.name}}", holder);
	if (v8Value.IsEmpty())
	return false;
	{{attribute.private_script_v8_value_to_local_cpp_value}};
	RELEASE_ASSERT(!exceptionState.hadException());
	*result = cppValue;
	return true;
	}
	{% endmacro %}


	{% macro attribute_setter_implemented_in_private_script(attribute) %}
	bool {{v8_class}}::PrivateScript::{{attribute.name}}AttributeSetter(LocalFrame* frame, {{cpp_class}}* holderImpl, {{attribute.argument_cpp_type}} cppValue)
	{
	if (!frame)
	return false;
	v8::HandleScope handleScope(toIsolate(frame));
	ScriptForbiddenScope::AllowUserAgentScript script;
	v8::Handle<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
	if (contextInPrivateScript.IsEmpty())
	return false;
	ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
	ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
	if (!scriptState->executionContext())
	return false;

	ScriptState::Scope scope(scriptState);
	v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());

	ExceptionState exceptionState(ExceptionState::SetterContext, "{{attribute.name}}", "{{cpp_class}}", scriptState->context()->Global(), scriptState->isolate());
	return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "{{cpp_class}}", "{{attribute.name}}", holder, {{attribute.private_script_cpp_value_to_v8_value}});
	}
	{% endmacro %}


	{##############################################################################}
	{% macro attribute_configuration(attribute) %}
	{% set getter_callback =
	'%sV8Internal::%sAttributeGetterCallback' %
	(cpp_class_or_partial, attribute.name)
	if not attribute.constructor_type else
	('%sV8Internal::%sConstructorGetterCallback' %
	(cpp_class_or_partial, attribute.name)
	if attribute.needs_constructor_getter_callback else
	'%sV8Internal::%sConstructorGetter' % (cpp_class_or_partial, cpp_class)) %}
	{% set getter_callback_for_main_world =
	'%sV8Internal::%sAttributeGetterCallbackForMainWorld' %
	(cpp_class_or_partial, attribute.name)
	if attribute.is_per_world_bindings else '0' %}
	{% set setter_callback = attribute.setter_callback %}
	{% set setter_callback_for_main_world =
	'%sV8Internal::%sAttributeSetterCallbackForMainWorld' %
	(cpp_class_or_partial, attribute.name)
	if attribute.is_per_world_bindings and
	(not attribute.is_read_only or attribute.put_forwards) else '0' %}
	{% set wrapper_type_info =
	'const_cast<WrapperTypeInfo*>(&V8%s::wrapperTypeInfo)' %
	attribute.constructor_type
	if attribute.constructor_type else '0' %}
	{% set access_control = 'static_cast<v8::AccessControl>(%s)' %
	' \| '.join(attribute.access_control_list) %}
	{% set property_attribute = 'static_cast<v8::PropertyAttribute>(%s)' %
	' \| '.join(attribute.property_attributes) %}
	{% set only_exposed_to_private_script = 'V8DOMConfiguration::OnlyExposedToPrivateScript' if attribute.only_exposed_to_private_script else 'V8DOMConfiguration::ExposedToAllScripts' %}
	{% set on_prototype = 'V8DOMConfiguration::OnPrototype'
	if interface_name == 'Window' and attribute.idl_type == 'EventHandler'
	else 'V8DOMConfiguration::OnInstance' %}
	{% set attribute_configuration_list = [
	'"%s"' % attribute.name,
	getter_callback,
	setter_callback,
	getter_callback_for_main_world,
	setter_callback_for_main_world,
	wrapper_type_info,
	access_control,
	property_attribute,
	only_exposed_to_private_script,
	] %}
	{% if not attribute.is_expose_js_accessors %}
	{% set attribute_configuration_list = attribute_configuration_list
	+ [on_prototype] %}
	{% endif %}
	{{'{'}}{{attribute_configuration_list \| join(', ')}}{{'}'}}
	{%- endmacro %}