LibWeb: Add the IdleDeadline interface from the RequestIdleCallback spec

Userland/Libraries/LibWeb/RequestIdleCallback/IdleDeadline.cpp

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/RequestIdleCallback/IdleDeadline.h>
+
+namespace Web::RequestIdleCallback {
+
+NonnullRefPtr<IdleDeadline> IdleDeadline::create(double time_remaining, bool did_timeout)
+{
+    return adopt_ref(*new IdleDeadline(time_remaining, did_timeout));
+}
+
+IdleDeadline::IdleDeadline(double time_remaining, bool did_timeout)
+    : m_time_remaining(time_remaining)
+    , m_did_timeout(did_timeout)
+{
+}
+
+IdleDeadline::~IdleDeadline()
+{
+}
+
+}

Userland/Libraries/LibWeb/RequestIdleCallback/IdleDeadline.h

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+/*
+ * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/StdLibExtras.h>
+#include <LibWeb/Bindings/Wrappable.h>
+
+namespace Web::RequestIdleCallback {
+
+class IdleDeadline final
+    : public RefCounted<IdleDeadline>
+    , public Bindings::Wrappable {
+public:
+    using WrapperType = Bindings::IdleDeadlineWrapper;
+    using AllowOwnPtr = TrueType;
+
+    static NonnullRefPtr<IdleDeadline> create(double time_remaining, bool did_timeout);
+    virtual ~IdleDeadline() override;
+
+    double time_remaining() const { return m_time_remaining; }
+    bool did_timeout() const { return m_did_timeout; }
+
+private:
+    IdleDeadline(double time_remaining, bool did_timeout);
+
+    double m_time_remaining { 0 };
+    bool m_did_timeout { false };
+};
+
+}

Userland/Libraries/LibWeb/RequestIdleCallback/IdleDeadline.idl

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+[Exposed=Window] interface IdleDeadline {
+
+    double timeRemaining();
+    readonly attribute boolean didTimeout;
+
+};