f71f404e0c
The environment settings object is effectively the context a piece of script is running under, for example, it contains the origin, responsible document, realm, global object and event loop for the current context. This effectively replaces ScriptExecutionContext, but it cannot be removed in this commit as EventTarget still depends on it. https://html.spec.whatwg.org/multipage/webappapis.html#environment-settings-object
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/*
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* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/FlyString.h>
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#include <AK/WeakPtr.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Module.h>
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#include <LibJS/Runtime/MarkedValueList.h>
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#include <LibJS/Runtime/PrivateEnvironment.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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using ScriptOrModule = Variant<Empty, WeakPtr<Script>, WeakPtr<Module>>;
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// 9.4 Execution Contexts, https://tc39.es/ecma262/#sec-execution-contexts
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struct ExecutionContext {
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explicit ExecutionContext(Heap& heap)
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: arguments(heap)
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{
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}
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[[nodiscard]] ExecutionContext copy() const
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{
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ExecutionContext copy { arguments };
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copy.function = function;
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copy.realm = realm;
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copy.script_or_module = script_or_module;
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copy.lexical_environment = lexical_environment;
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copy.variable_environment = variable_environment;
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copy.private_environment = private_environment;
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copy.current_node = current_node;
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copy.function_name = function_name;
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copy.this_value = this_value;
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copy.is_strict_mode = is_strict_mode;
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return copy;
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}
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private:
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explicit ExecutionContext(MarkedValueList existing_arguments)
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: arguments(move(existing_arguments))
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{
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}
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public:
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FunctionObject* function { nullptr }; // [[Function]]
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Realm* realm { nullptr }; // [[Realm]]
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ScriptOrModule script_or_module; // [[ScriptOrModule]]
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Environment* lexical_environment { nullptr }; // [[LexicalEnvironment]]
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Environment* variable_environment { nullptr }; // [[VariableEnvironment]]
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PrivateEnvironment* private_environment { nullptr }; // [[PrivateEnvironment]]
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ASTNode const* current_node { nullptr };
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FlyString function_name;
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Value this_value;
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MarkedValueList arguments;
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bool is_strict_mode { false };
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// https://html.spec.whatwg.org/multipage/webappapis.html#skip-when-determining-incumbent-counter
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// FIXME: Move this out of LibJS (e.g. by using the CustomData concept), as it's used exclusively by LibWeb.
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size_t skip_when_determining_incumbent_counter { 0 };
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};
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}
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