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LibWeb: Implement size attribute of ByteLengthQueuingStrategy

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Co-authored-by: Matthew Olsson <mattco@serenityos.org>
This commit is contained in:
Shannon Booth 2023-06-23 08:49:12 +12:00 • committed by Andreas Kling
parent b2a51e86e5
commit a975fca42e
5 changed files with 42 additions and 1 deletions
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25
Userland/Libraries/LibWeb/HTML/Window.cpp
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@ -111,6 +111,7 @@ void Window::visit_edges(JS::Cell::Visitor& visitor)
for (auto& mime_type_object : m_pdf_viewer_mime_type_objects)
visitor.visit(mime_type_object);
visitor.visit(m_count_queuing_strategy_size_function);
visitor.visit(m_byte_length_queuing_strategy_size_function);
}
Window::~Window() = default;
@ -780,6 +781,30 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::CallbackType>> Window::count_queuin
return JS::NonnullGCPtr { *m_count_queuing_strategy_size_function };
}
// https://streams.spec.whatwg.org/#byte-length-queuing-strategy-size-function
WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::CallbackType>> Window::byte_length_queuing_strategy_size_function()
{
auto& realm = this->realm();
if (!m_byte_length_queuing_strategy_size_function) {
// 1. Let steps be the following steps, given chunk:
auto steps = [](JS::VM& vm) {
auto chunk = vm.argument(0);
// 1. Return ? GetV(chunk, "byteLength").
return chunk.get(vm, vm.names.byteLength);
};
// 2. Let F be ! CreateBuiltinFunction(steps, 1, "size", « », globalObject’s relevant Realm).
auto function = JS::NativeFunction::create(realm, move(steps), 1, "size", &realm);
// 3. Set globalObject’s byte length queuing strategy size function to a Function that represents a reference to F, with callback context equal to globalObject’s relevant settings object.
m_byte_length_queuing_strategy_size_function = MUST_OR_THROW_OOM(heap().allocate<WebIDL::CallbackType>(realm, *function, relevant_settings_object(*this)));
}
return JS::NonnullGCPtr { *m_byte_length_queuing_strategy_size_function };
}
WebIDL::ExceptionOr<void> Window::initialize_web_interfaces(Badge<WindowEnvironmentSettingsObject>)
{
auto& realm = this->realm();