ladybird/Userland/Libraries/LibWeb/HTML/Scripting/TemporaryExecutionContext.h
Andrew Kaster 2c3531ab78 LibWeb: Move JS::Promise <-> WebIDL conversion into IDL
This change also removes as much direct use of JS::Promise in LibWeb
as possible. When specs refer to `Promise<T>` they should be assumed
to be referring to the WebIDL Promise type, not the JS::Promise type.

The one exception is the HostPromiseRejectionTracker hook on the JS
VM. This facility and its associated sets and events are intended to
expose the exact opaque object handles that were rejected to author
code. This is not possible with the WebIDL Promise type, so we have
to use JS::Promise or JS::Object to hold onto the promises.

It also exposes which specs need some updates in the area of
promises. WebDriver stands out in this regard. WebAudio could use
some more cross-references to WebIDL as well to clarify things.
2024-10-25 14:04:21 -06:00

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/*
* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Heap/GCPtr.h>
#include <LibWeb/Forward.h>
namespace Web::HTML {
// When JS is run from outside the context of any user script, we currently do not have a running execution context.
// This results in a crash when we access VM::running_execution_context(). This is a spec issue. Until it is resolved,
// this is a workaround to temporarily push an execution context.
class TemporaryExecutionContext {
public:
enum class CallbacksEnabled {
No,
Yes,
};
explicit TemporaryExecutionContext(EnvironmentSettingsObject&, CallbacksEnabled = CallbacksEnabled::No);
~TemporaryExecutionContext();
private:
JS::NonnullGCPtr<EnvironmentSettingsObject> m_environment_settings;
CallbacksEnabled m_callbacks_enabled { CallbacksEnabled::No };
};
}