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https://github.com/RGBCube/serenity
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df1bb0ff49
Some of the live HTMLCollection only ever contain children of their root node. When we know that's the case, we can avoid doing a full subtree traversal of all descendants and only visit children. This cuts the ECMA262 spec loading time by over 10 seconds. :^)
97 lines
4 KiB
C++
97 lines
4 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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* Copyright (c) 2022, Andreas Kling <kling@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 <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/DOM/ElementFactory.h>
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#include <LibWeb/DOM/HTMLCollection.h>
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#include <LibWeb/HTML/HTMLTableRowElement.h>
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#include <LibWeb/HTML/HTMLTableSectionElement.h>
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#include <LibWeb/Namespace.h>
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namespace Web::HTML {
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HTMLTableSectionElement::HTMLTableSectionElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: HTMLElement(document, move(qualified_name))
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{
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}
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HTMLTableSectionElement::~HTMLTableSectionElement() = default;
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JS::ThrowCompletionOr<void> HTMLTableSectionElement::initialize(JS::Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLTableSectionElementPrototype>(realm, "HTMLTableSectionElement"));
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return {};
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}
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void HTMLTableSectionElement::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_rows);
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}
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// https://html.spec.whatwg.org/multipage/tables.html#dom-tbody-rows
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JS::NonnullGCPtr<DOM::HTMLCollection> HTMLTableSectionElement::rows() const
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{
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// The rows attribute must return an HTMLCollection rooted at this element,
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// whose filter matches only tr elements that are children of this element.
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if (!m_rows) {
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m_rows = DOM::HTMLCollection::create(const_cast<HTMLTableSectionElement&>(*this), DOM::HTMLCollection::Scope::Children, [](Element const& element) {
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return is<HTMLTableRowElement>(element);
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}).release_value_but_fixme_should_propagate_errors();
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}
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return *m_rows;
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}
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// https://html.spec.whatwg.org/multipage/tables.html#dom-tbody-insertrow
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WebIDL::ExceptionOr<JS::NonnullGCPtr<HTMLTableRowElement>> HTMLTableSectionElement::insert_row(long index)
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{
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auto rows_collection = rows();
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auto rows_collection_size = static_cast<long>(rows_collection->length());
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// 1. If index is less than −1 or greater than the number of elements in the rows collection, throw an "IndexSizeError" DOMException.
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if (index < -1 || index > rows_collection_size)
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return WebIDL::IndexSizeError::create(realm(), "Index is negative or greater than the number of rows");
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// 2. Let table row be the result of creating an element given this element's node document, tr, and the HTML namespace.
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auto& table_row = static_cast<HTMLTableRowElement&>(*TRY(DOM::create_element(document(), TagNames::tr, Namespace::HTML)));
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// 3. If index is −1 or equal to the number of items in the rows collection, then append table row to this element.
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if (index == -1 || index == rows_collection_size)
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TRY(append_child(table_row));
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// 4. Otherwise, insert table row as a child of this element, immediately before the index-th tr element in the rows collection.
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else
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table_row.insert_before(*this, rows_collection->item(index));
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// 5. Return table row.
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return JS::NonnullGCPtr(table_row);
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}
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// https://html.spec.whatwg.org/multipage/tables.html#dom-tbody-deleterow
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WebIDL::ExceptionOr<void> HTMLTableSectionElement::delete_row(long index)
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{
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auto rows_collection = rows();
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auto rows_collection_size = static_cast<long>(rows_collection->length());
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// 1. If index is less than −1 or greater than or equal to the number of elements in the rows collection, then throw an "IndexSizeError" DOMException.
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if (index < -1 || index >= rows_collection_size)
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return WebIDL::IndexSizeError::create(realm(), "Index is negative or greater than or equal to the number of rows");
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// 2. If index is −1, then remove the last element in the rows collection from this element, or do nothing if the rows collection is empty.
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if (index == -1) {
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if (rows_collection_size > 0)
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rows_collection->item(rows_collection_size - 1)->remove();
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}
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// 3. Otherwise, remove the indexth element in the rows collection from this element.
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else {
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rows_collection->item(index)->remove();
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}
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return {};
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}
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}
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