LibWeb/HTML: Implement TextTrackCueList idl interface

Author: https://github.com/jamierocks
Commit: cfec88feb3
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1494
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/tcl3 ✅

Userland/Libraries/LibWeb/HTML/TextTrackCueList.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Heap/MarkedVector.h>
+#include <LibWeb/DOM/EventTarget.h>
+#include <LibWeb/HTML/TextTrackCue.h>
+
+namespace Web::HTML {
+
+// https://html.spec.whatwg.org/multipage/media.html#texttrackcuelist
+class TextTrackCueList final : public DOM::EventTarget {
+    WEB_PLATFORM_OBJECT(TextTrackCueList, DOM::EventTarget);
+    JS_DECLARE_ALLOCATOR(TextTrackCueList);
+
+public:
+    virtual ~TextTrackCueList() override;
+
+    size_t length() const;
+
+    JS::GCPtr<TextTrackCue> get_cue_by_id(StringView id) const;
+
+private:
+    TextTrackCueList(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Visitor&) override;
+
+    virtual JS::ThrowCompletionOr<Optional<JS::PropertyDescriptor>> internal_get_own_property(JS::PropertyKey const& property_name) const override;
+
+    Vector<JS::NonnullGCPtr<TextTrackCue>> m_cues;
+};
+
+}