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LibWeb: Add basic support for DOM's NodeIterator and NodeFilter

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This patch adds NodeIterator (created via Document.createNodeIterator())
which allows you to iterate through all the nodes in a subtree while
filtering with a provided NodeFilter callback along the way.

This first cut implements the full API, but does not yet handle nodes
being removed from the document while referenced by the iterator. That
will be done in a subsequent patch.
This commit is contained in:
Andreas Kling 2022-03-09 14:34:32 +01:00
parent ba87f23f22
commit fabcee016f
12 changed files with 357 additions and 5 deletions
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9
Userland/Libraries/LibWeb/DOM/Document.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
@ -31,6 +31,7 @@
#include <LibWeb/DOM/Event.h>
#include <LibWeb/DOM/ExceptionOr.h>
#include <LibWeb/DOM/HTMLCollection.h>
#include <LibWeb/DOM/NodeIterator.h>
#include <LibWeb/DOM/Range.h>
#include <LibWeb/DOM/ShadowRoot.h>
#include <LibWeb/DOM/Text.h>
@ -1460,4 +1461,10 @@ ExceptionOr<Document::PrefixAndTagName> Document::validate_qualified_name(String
};
}
// https://dom.spec.whatwg.org/#dom-document-createnodeiterator
NonnullRefPtr<NodeIterator> Document::create_node_iterator(Node& root, unsigned what_to_show, RefPtr<NodeFilter> filter)
{
return NodeIterator::create(root, what_to_show, move(filter));
}
}