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LibWeb: Implement HTMLSelectElement.selectedIndex

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This commit is contained in:
Andreas Kling 2022-03-20 16:13:23 +01:00
parent 5dc0855489
commit a606345576
Notes: sideshowbarker 2024-07-17 18:49:10 +09:00
4 changed files with 70 additions and 2 deletions
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55
Userland/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
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@ -1,11 +1,12 @@
/*
* Copyright (c) 2020, the SerenityOS developers.
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/HTML/HTMLFormElement.h>
#include <LibWeb/HTML/HTMLOptGroupElement.h>
#include <LibWeb/HTML/HTMLOptionElement.h>
#include <LibWeb/HTML/HTMLSelectElement.h>
@ -33,4 +34,56 @@ RefPtr<HTMLOptionsCollection> const& HTMLSelectElement::options()
return m_options;
}
// https://html.spec.whatwg.org/multipage/form-elements.html#concept-select-option-list
NonnullRefPtrVector<HTMLOptionElement> HTMLSelectElement::list_of_options() const
{
// The list of options for a select element consists of all the option element children of the select element,
// and all the option element children of all the optgroup element children of the select element, in tree order.
NonnullRefPtrVector<HTMLOptionElement> list;
for_each_child_of_type<HTMLOptionElement>([&](HTMLOptionElement const& option_element) {
list.append(option_element);
});
for_each_child_of_type<HTMLOptGroupElement>([&](HTMLOptGroupElement const& optgroup_element) {
optgroup_element.for_each_child_of_type<HTMLOptionElement>([&](HTMLOptionElement const& option_element) {
list.append(option_element);
});
});
return list;
}
// https://html.spec.whatwg.org/multipage/form-elements.html#dom-select-selectedindex
int HTMLSelectElement::selected_index() const
{
// The selectedIndex IDL attribute, on getting, must return the index of the first option element in the list of options
// in tree order that has its selectedness set to true, if any. If there isn't one, then it must return −1.
int index = 0;
for (auto const& option_element : list_of_options()) {
if (option_element.selected())
return index;
++index;
}
return -1;
}
void HTMLSelectElement::set_selected_index(int index)
{
// On setting, the selectedIndex attribute must set the selectedness of all the option elements in the list of options to false,
// and then the option element in the list of options whose index is the given new value,
// if any, must have its selectedness set to true and its dirtiness set to true.
auto options = list_of_options();
for (auto& option : options)
option.m_selected = false;
if (index < 0 || index >= static_cast<int>(options.size()))
return;
auto& selected_option = options[index];
selected_option.m_selected = true;
selected_option.m_dirty = true;
}
}