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`convert_nodes_to_single_node` is inside its own file so ChildNode can include and use it without having to include other headers such as DOM/Node.h. This is to prevent circular includes.
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
/*
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* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <LibWeb/DOM/DocumentFragment.h>
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#include <LibWeb/DOM/NodeOperations.h>
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#include <LibWeb/DOM/Text.h>
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namespace Web::DOM {
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// https://dom.spec.whatwg.org/#converting-nodes-into-a-node
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ExceptionOr<NonnullRefPtr<Node>> convert_nodes_to_single_node(Vector<Variant<NonnullRefPtr<Node>, String>> const& nodes, DOM::Document& document)
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{
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// 1. Let node be null.
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// 2. Replace each string in nodes with a new Text node whose data is the string and node document is document.
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// 3. If nodes contains one node, then set node to nodes[0].
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// 4. Otherwise, set node to a new DocumentFragment node whose node document is document, and then append each node in nodes, if any, to it.
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// 5. Return node.
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auto potentially_convert_string_to_text_node = [&document](Variant<NonnullRefPtr<Node>, String> const& node) -> NonnullRefPtr<Node> {
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if (node.has<NonnullRefPtr<Node>>())
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return node.get<NonnullRefPtr<Node>>();
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return adopt_ref(*new Text(document, node.get<String>()));
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};
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if (nodes.size() == 1)
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return potentially_convert_string_to_text_node(nodes.first());
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// This is NNRP<Node> instead of NNRP<DocumentFragment> to be compatible with the return type.
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NonnullRefPtr<Node> document_fragment = adopt_ref(*new DocumentFragment(document));
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for (auto& unconverted_node : nodes) {
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auto node = potentially_convert_string_to_text_node(unconverted_node);
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auto result = document_fragment->append_child(node);
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if (result.is_exception())
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return result.exception();
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}
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return document_fragment;
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}
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}
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