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
97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@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/Function.h>
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#include <AK/WeakPtr.h>
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#include <LibCore/Forward.h>
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#include <LibJS/Forward.h>
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#include <LibWeb/HTML/EventLoop/TaskQueue.h>
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namespace Web::HTML {
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class EventLoop {
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public:
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enum class Type {
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// https://html.spec.whatwg.org/multipage/webappapis.html#window-event-loop
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Window,
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// https://html.spec.whatwg.org/multipage/webappapis.html#worker-event-loop
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Worker,
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// https://html.spec.whatwg.org/multipage/webappapis.html#worklet-event-loop
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Worklet,
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};
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EventLoop();
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~EventLoop();
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Type type() const { return m_type; }
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TaskQueue& task_queue() { return m_task_queue; }
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TaskQueue const& task_queue() const { return m_task_queue; }
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TaskQueue& microtask_queue() { return m_microtask_queue; }
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TaskQueue const& microtask_queue() const { return m_microtask_queue; }
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void spin_until(Function<bool()> goal_condition);
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void process();
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Task const* currently_running_task() const { return m_currently_running_task; }
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JS::VM& vm() { return *m_vm; }
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JS::VM const& vm() const { return *m_vm; }
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void set_vm(JS::VM&);
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void schedule();
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void perform_a_microtask_checkpoint();
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void register_document(Badge<DOM::Document>, DOM::Document&);
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void unregister_document(Badge<DOM::Document>, DOM::Document&);
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NonnullRefPtrVector<DOM::Document> documents_in_this_event_loop() const;
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void push_onto_backup_incumbent_settings_object_stack(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject& environment_settings_object);
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void pop_backup_incumbent_settings_object_stack(Badge<EnvironmentSettingsObject>);
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EnvironmentSettingsObject& top_of_backup_incumbent_settings_object_stack();
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bool is_backup_incumbent_settings_object_stack_empty() const { return m_backup_incumbent_settings_object_stack.is_empty(); }
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void register_environment_settings_object(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject&);
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void unregister_environment_settings_object(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject&);
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private:
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Type m_type { Type::Window };
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TaskQueue m_task_queue;
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TaskQueue m_microtask_queue;
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// https://html.spec.whatwg.org/multipage/webappapis.html#currently-running-task
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Task* m_currently_running_task { nullptr };
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JS::VM* m_vm { nullptr };
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RefPtr<Core::Timer> m_system_event_loop_timer;
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// https://html.spec.whatwg.org/#performing-a-microtask-checkpoint
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bool m_performing_a_microtask_checkpoint { false };
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Vector<WeakPtr<DOM::Document>> m_documents;
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// Used to implement step 4 of "perform a microtask checkpoint".
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Vector<EnvironmentSettingsObject&> m_related_environment_settings_objects;
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// https://html.spec.whatwg.org/multipage/webappapis.html#backup-incumbent-settings-object-stack
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Vector<EnvironmentSettingsObject&> m_backup_incumbent_settings_object_stack;
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};
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EventLoop& main_thread_event_loop();
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void old_queue_global_task_with_document(HTML::Task::Source, DOM::Document&, Function<void()> steps);
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void queue_global_task(HTML::Task::Source, JS::GlobalObject&, Function<void()> steps);
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void queue_a_microtask(DOM::Document*, Function<void()> steps);
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void perform_a_microtask_checkpoint();
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}
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