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LibWeb: Add an interface to be notified of Document state changes

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Some HTML elements, e.g. HTMLMediaElement, need to take action when the
document becomes inactive.
This commit is contained in:
Timothy Flynn
2023-05-04 08:48:53 -04:00
committed by Andreas Kling
parent 88b8969443
commit f78eadf00f
Notes: sideshowbarker 2024-07-16 20:42:33 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/f78eadf00f
Pull-request: https://github.com/SerenityOS/serenity/pull/18638
Reviewed-by: https://github.com/awesomekling
6 changed files with 92 additions and 1 deletions
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32
Userland/Libraries/LibWeb/DOM/DocumentObserver.cpp Normal file
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/*
* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Realm.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/DocumentObserver.h>
namespace Web::DOM {
DocumentObserver::DocumentObserver(JS::Realm& realm, DOM::Document& document)
: Bindings::PlatformObject(realm)
, m_document(document)
{
m_document->register_document_observer({}, *this);
}
void DocumentObserver::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_document);
}
void DocumentObserver::finalize()
{
Base::finalize();
m_document->unregister_document_observer({}, *this);
}
}