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LibWeb: Start implementing "create and initialize a Document" from HTML

The way we've been creating DOM::Document has been pretty far from what
the spec tells us to do, and this is a first big step towards getting us
closer to spec.

The new Document::create_and_initialize() is called by FrameLoader after
loading a "text/html" resource.

We create the JS Realm and the Window object when creating the Document
(previously, we'd do it on first access to Document::interpreter().)

The realm execution context is owned by the Environment Settings Object.
This commit is contained in:
Andreas Kling 2022-08-04 21:30:33 +02:00
parent 0781bdb23e
commit 602f927982
13 changed files with 315 additions and 78 deletions

View file

@ -366,4 +366,28 @@ void queue_mutation_observer_microtask(DOM::Document& document)
});
}
// https://html.spec.whatwg.org/multipage/webappapis.html#creating-a-new-javascript-realm
NonnullOwnPtr<JS::ExecutionContext> create_a_new_javascript_realm(JS::VM& vm, Function<JS::Value(JS::Realm&)> create_global_object, Function<JS::Value(JS::Realm&)> create_global_this_value)
{
// 1. Perform InitializeHostDefinedRealm() with the provided customizations for creating the global object and the global this binding.
// 2. Let realm execution context be the running JavaScript execution context.
auto realm_execution_context = MUST(JS::Realm::initialize_host_defined_realm(vm, move(create_global_object), move(create_global_this_value)));
// 3. Remove realm execution context from the JavaScript execution context stack.
vm.execution_context_stack().remove_first_matching([&realm_execution_context](auto* execution_context) {
return execution_context == realm_execution_context.ptr();
});
// NO-OP: 4. Let realm be realm execution context's Realm component.
// NO-OP: 5. Set realm's agent to agent.
// FIXME: 6. If agent's agent cluster's cross-origin isolation mode is "none", then:
// 1. Let global be realm's global object.
// 2. Let status be ! global.[[Delete]]("SharedArrayBuffer").
// 3. Assert: status is true.
// 7. Return realm execution context.
return realm_execution_context;
}
}