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@@ -1,11 +1,12 @@
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/*
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* Copyright (c) 2020, the SerenityOS developers.
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- * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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+ * Copyright (c) 2021-2022, 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/HTML/HTMLFormElement.h>
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+#include <LibWeb/HTML/HTMLOptGroupElement.h>
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#include <LibWeb/HTML/HTMLOptionElement.h>
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#include <LibWeb/HTML/HTMLSelectElement.h>
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@@ -33,4 +34,56 @@ RefPtr<HTMLOptionsCollection> const& HTMLSelectElement::options()
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return m_options;
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}
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+// https://html.spec.whatwg.org/multipage/form-elements.html#concept-select-option-list
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+NonnullRefPtrVector<HTMLOptionElement> HTMLSelectElement::list_of_options() const
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+{
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+ // The list of options for a select element consists of all the option element children of the select element,
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+ // and all the option element children of all the optgroup element children of the select element, in tree order.
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+ NonnullRefPtrVector<HTMLOptionElement> list;
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+
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+ for_each_child_of_type<HTMLOptionElement>([&](HTMLOptionElement const& option_element) {
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+ list.append(option_element);
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+ });
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+
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+ for_each_child_of_type<HTMLOptGroupElement>([&](HTMLOptGroupElement const& optgroup_element) {
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+ optgroup_element.for_each_child_of_type<HTMLOptionElement>([&](HTMLOptionElement const& option_element) {
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+ list.append(option_element);
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+ });
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+ });
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+
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+ return list;
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+}
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+
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+// https://html.spec.whatwg.org/multipage/form-elements.html#dom-select-selectedindex
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+int HTMLSelectElement::selected_index() const
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+{
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+ // The selectedIndex IDL attribute, on getting, must return the index of the first option element in the list of options
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+ // in tree order that has its selectedness set to true, if any. If there isn't one, then it must return −1.
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+
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+ int index = 0;
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+ for (auto const& option_element : list_of_options()) {
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+ if (option_element.selected())
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+ return index;
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+ ++index;
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+ }
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+ return -1;
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+}
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+
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+void HTMLSelectElement::set_selected_index(int index)
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+{
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+ // On setting, the selectedIndex attribute must set the selectedness of all the option elements in the list of options to false,
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+ // and then the option element in the list of options whose index is the given new value,
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+ // if any, must have its selectedness set to true and its dirtiness set to true.
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+ auto options = list_of_options();
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+ for (auto& option : options)
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+ option.m_selected = false;
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+
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+ if (index < 0 || index >= static_cast<int>(options.size()))
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+ return;
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+
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+ auto& selected_option = options[index];
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+ selected_option.m_selected = true;
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+ selected_option.m_dirty = true;
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+}
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+
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}
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