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https://github.com/SerenityOS/serenity
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LibIDL+LibWeb: Mark [FIXME] interfaces as [[Unimplemented]]
Methods and attributes marked with [FIXME] are now implemented as direct properties with the value `undefined` and are marked with the [[Unimplemented]] attribute. This allows accesses to these properties to be reported, while having no other side-effects. This fixes an issue where [FIXME] methods broke feature detection on some sites. (cherry picked from commit 2f5cf8ac204a58dc2a6f722dd95015c6c2fb7a78)
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@ -1947,15 +1947,6 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@function.name:snakecase@@overload_suffi
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[[maybe_unused]] auto& realm = *vm.current_realm();
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)~~~");
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if (function.extended_attributes.contains("FIXME")) {
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function_generator.append(R"~~~(
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dbgln("FIXME: Unimplemented IDL interface '@namespaced_name@.@function.name@'");
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return JS::js_undefined();
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}
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)~~~");
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return;
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}
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if (is_static_function == StaticFunction::No) {
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function_generator.append(R"~~~(
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auto* impl = TRY(impl_from(vm));
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@ -2697,6 +2688,8 @@ static void generate_prototype_or_global_mixin_declarations(IDL::Interface const
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}
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for (auto& attribute : interface.attributes) {
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if (attribute.extended_attributes.contains("FIXME"))
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continue;
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.name:snakecase", attribute.name.to_snakecase());
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attribute_generator.append(R"~~~(
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@ -2778,6 +2771,8 @@ static void collect_attribute_values_of_an_inheritance_stack(SourceGenerator& fu
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// NOTE: Functions, constructors and static functions cannot be JSON types, so they're not checked here.
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for (auto& attribute : interface_in_chain.attributes) {
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if (attribute.extended_attributes.contains("FIXME"))
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continue;
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if (!attribute.type->is_json(interface_in_chain))
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continue;
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@ -3131,6 +3126,15 @@ void @class_name@::initialize(JS::Realm& realm)
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// https://webidl.spec.whatwg.org/#es-attributes
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for (auto& attribute : interface.attributes) {
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if (attribute.extended_attributes.contains("FIXME")) {
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auto fixme_attribute_generator = generator.fork();
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fixme_attribute_generator.set("attribute.name", attribute.name);
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fixme_attribute_generator.append(R"~~~(
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define_direct_property("@attribute.name@", JS::js_undefined(), default_attributes | JS::Attribute::Unimplemented);
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)~~~");
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continue;
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}
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.name", attribute.name);
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attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
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@ -3151,6 +3155,16 @@ void @class_name@::initialize(JS::Realm& realm)
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)~~~");
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}
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for (auto& function : interface.functions) {
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if (function.extended_attributes.contains("FIXME")) {
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auto fixme_function_generator = generator.fork();
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fixme_function_generator.set("function.name", function.name);
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fixme_function_generator.append(R"~~~(
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define_direct_property("@function.name@", JS::js_undefined(), default_attributes | JS::Attribute::Unimplemented);
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)~~~");
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}
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}
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// https://webidl.spec.whatwg.org/#es-constants
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for (auto& constant : interface.constants) {
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// FIXME: Do constants need to be added to the unscopable list?
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@ -3310,6 +3324,8 @@ void @class_name@::initialize(JS::Realm& realm)
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}
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for (auto& attribute : interface.attributes) {
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if (attribute.extended_attributes.contains("FIXME"))
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continue;
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auto attribute_generator = generator.fork();
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attribute_generator.set("attribute.name", attribute.name);
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attribute_generator.set("attribute.getter_callback", attribute.getter_callback_name);
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@ -3342,26 +3358,6 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.getter_callback@)
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[[maybe_unused]] auto& realm = *vm.current_realm();
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[[maybe_unused]] auto* impl = TRY(impl_from(vm));
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)~~~");
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if (attribute.extended_attributes.contains("FIXME")) {
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attribute_generator.append(R"~~~(
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dbgln("FIXME: Unimplemented IDL interface '@namespaced_name@.@attribute.name@'");
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return JS::js_undefined();
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}
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)~~~");
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if (!attribute.readonly || attribute.extended_attributes.contains("PutForwards"sv)) {
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attribute_generator.append(R"~~~(
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JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
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{
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WebIDL::log_trace(vm, "@class_name@::@attribute.setter_callback@");
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dbgln("FIXME: Unimplemented IDL interface '@namespaced_name@.@attribute.name@'");
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return JS::js_undefined();
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}
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)~~~");
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}
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continue;
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}
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if (attribute.extended_attributes.contains("CEReactions")) {
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// 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
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attribute_generator.append(R"~~~(
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@ -3757,6 +3753,8 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
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// Implementation: Functions
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for (auto& function : interface.functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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if (function.extended_attributes.contains("Default")) {
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if (function.name == "toJSON"sv && function.return_type->name() == "object"sv) {
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generate_default_to_json_function(generator, class_name, interface);
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@ -4192,8 +4190,11 @@ void @namespace_class@::finalize()
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)~~~");
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}
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for (auto const& function : interface.functions)
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for (auto const& function : interface.functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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generate_function(generator, function, StaticFunction::Yes, interface.namespace_class, interface.name, interface);
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}
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for (auto const& overload_set : interface.overload_sets) {
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if (overload_set.value.size() == 1)
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continue;
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@ -4484,8 +4485,11 @@ JS_DEFINE_NATIVE_FUNCTION(@constructor_class@::@attribute.getter_callback@)
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}
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// Implementation: Static Functions
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for (auto& function : interface.static_functions)
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for (auto& function : interface.static_functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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generate_function(generator, function, StaticFunction::Yes, interface.constructor_class, interface.fully_qualified_name, interface);
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}
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for (auto const& overload_set : interface.static_overload_sets) {
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if (overload_set.value.size() == 1)
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continue;
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@ -4586,6 +4590,8 @@ void generate_prototype_implementation(IDL::Interface const& interface, StringBu
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bool has_ce_reactions = false;
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for (auto const& function : interface.functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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if (function.extended_attributes.contains("CEReactions")) {
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has_ce_reactions = true;
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break;
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@ -1158,6 +1158,8 @@ Interface& Parser::parse()
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// Create overload sets
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for (auto& function : interface.functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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auto& overload_set = interface.overload_sets.ensure(function.name);
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function.overload_index = overload_set.size();
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overload_set.append(function);
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@ -1169,6 +1171,8 @@ Interface& Parser::parse()
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overloaded_function.is_overloaded = true;
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}
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for (auto& function : interface.static_functions) {
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if (function.extended_attributes.contains("FIXME"))
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continue;
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auto& overload_set = interface.static_overload_sets.ensure(function.name);
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function.overload_index = overload_set.size();
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overload_set.append(function);
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@ -1180,6 +1184,8 @@ Interface& Parser::parse()
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overloaded_function.is_overloaded = true;
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}
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for (auto& constructor : interface.constructors) {
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if (constructor.extended_attributes.contains("FIXME"))
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continue;
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auto& overload_set = interface.constructor_overload_sets.ensure(constructor.name);
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constructor.overload_index = overload_set.size();
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overload_set.append(constructor);
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@ -81,6 +81,9 @@ ErrorOr<void> initialize_main_thread_vm()
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VERIFY(!s_main_thread_vm);
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s_main_thread_vm = TRY(JS::VM::create(make<WebEngineCustomData>()));
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s_main_thread_vm->on_unimplemented_property_access = [](auto const& object, auto const& property_key) {
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dbgln("FIXME: Unimplemented IDL interface: '{}.{}'", object.class_name(), property_key.to_string());
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};
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// NOTE: We intentionally leak the main thread JavaScript VM.
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// This avoids doing an exhaustive garbage collection on process exit.
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