123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354 |
- /*
- * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <LibWeb/DOM/LiveNodeList.h>
- #include <LibWeb/DOM/Node.h>
- namespace Web::DOM {
- LiveNodeList::LiveNodeList(Node& root, Function<bool(Node const&)> filter)
- : m_root(root)
- , m_filter(move(filter))
- {
- }
- NonnullRefPtrVector<Node> LiveNodeList::collection() const
- {
- NonnullRefPtrVector<Node> nodes;
- m_root->for_each_in_inclusive_subtree_of_type<Node>([&](auto& node) {
- if (m_filter(node))
- nodes.append(node);
- return IterationDecision::Continue;
- });
- return nodes;
- }
- // https://dom.spec.whatwg.org/#dom-nodelist-length
- u32 LiveNodeList::length() const
- {
- return collection().size();
- }
- // https://dom.spec.whatwg.org/#dom-nodelist-item
- Node const* LiveNodeList::item(u32 index) const
- {
- // The item(index) method must return the indexth node in the collection. If there is no indexth node in the collection, then the method must return null.
- auto nodes = collection();
- if (index >= nodes.size())
- return nullptr;
- return &nodes[index];
- }
- // https://dom.spec.whatwg.org/#ref-for-dfn-supported-property-indices
- bool LiveNodeList::is_supported_property_index(u32 index) const
- {
- // The object’s supported property indices are the numbers in the range zero to one less than the number of nodes represented by the collection.
- // If there are no such elements, then there are no supported property indices.
- return index < length();
- }
- }
|