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LibWeb: Introduce the Environment Settings Object

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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
This commit is contained in:
Luke Wilde 2021-10-14 16:12:53 +01:00 • committed by Linus Groh
parent 4db5406d62
commit f71f404e0c
29 changed files with 883 additions and 86 deletions
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19
Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h
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@ -55,6 +55,14 @@ public:
NonnullRefPtrVector<DOM::Document> documents_in_this_event_loop() const;
void push_onto_backup_incumbent_settings_object_stack(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject& environment_settings_object);
void pop_backup_incumbent_settings_object_stack(Badge<EnvironmentSettingsObject>);
EnvironmentSettingsObject& top_of_backup_incumbent_settings_object_stack();
bool is_backup_incumbent_settings_object_stack_empty() const { return m_backup_incumbent_settings_object_stack.is_empty(); }
void register_environment_settings_object(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject&);
void unregister_environment_settings_object(Badge<EnvironmentSettingsObject>, EnvironmentSettingsObject&);
private:
Type m_type { Type::Window };
@ -72,11 +80,18 @@ private:
bool m_performing_a_microtask_checkpoint { false };
Vector<WeakPtr<DOM::Document>> m_documents;
// Used to implement step 4 of "perform a microtask checkpoint".
Vector<EnvironmentSettingsObject&> m_related_environment_settings_objects;
// https://html.spec.whatwg.org/multipage/webappapis.html#backup-incumbent-settings-object-stack
Vector<EnvironmentSettingsObject&> m_backup_incumbent_settings_object_stack;
};
EventLoop& main_thread_event_loop();
void queue_global_task(HTML::Task::Source, DOM::Document&, Function<void()> steps);
void queue_a_microtask(DOM::Document&, Function<void()> steps);
void old_queue_global_task_with_document(HTML::Task::Source, DOM::Document&, Function<void()> steps);
void queue_global_task(HTML::Task::Source, JS::GlobalObject&, Function<void()> steps);
void queue_a_microtask(DOM::Document*, Function<void()> steps);
void perform_a_microtask_checkpoint();
}