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1defc4595b
This allows us to improve the const-correctness in RadioNodeList, which
has been made possible as of: 5f0ccfb499 now that a GC-visit accepts a
const GC pointer.
106 lines
4.0 KiB
C++
106 lines
4.0 KiB
C++
/*
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* Copyright (c) 2023, Shannon Booth <shannon@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/Bindings/RadioNodeListPrototype.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/RadioNodeList.h>
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#include <LibWeb/HTML/HTMLInputElement.h>
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namespace Web::DOM {
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JS_DEFINE_ALLOCATOR(RadioNodeList);
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JS::NonnullGCPtr<RadioNodeList> RadioNodeList::create(JS::Realm& realm, Node const& root, Scope scope, Function<bool(Node const&)> filter)
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{
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return realm.heap().allocate<RadioNodeList>(realm, realm, root, scope, move(filter));
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}
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RadioNodeList::RadioNodeList(JS::Realm& realm, Node const& root, Scope scope, Function<bool(Node const&)> filter)
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: LiveNodeList(realm, root, scope, move(filter))
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{
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}
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RadioNodeList::~RadioNodeList() = default;
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void RadioNodeList::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::RadioNodeListPrototype>(realm, "RadioNodeList"_fly_string));
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}
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static HTML::HTMLInputElement const* radio_button(Node const& node)
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{
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if (!is<HTML::HTMLInputElement>(node))
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return nullptr;
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auto const& input_element = verify_cast<HTML::HTMLInputElement>(node);
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if (input_element.type_state() != HTML::HTMLInputElement::TypeAttributeState::RadioButton)
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return nullptr;
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return &input_element;
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}
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// https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#dom-radionodelist-value
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FlyString RadioNodeList::value() const
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{
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// 1. Let element be the first element in tree order represented by the RadioNodeList object that is an input element whose type
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// attribute is in the Radio Button state and whose checkedness is true. Otherwise, let it be null.
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auto* element = verify_cast<HTML::HTMLInputElement>(first_matching([](Node const& node) -> bool {
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auto const* button = radio_button(node);
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if (!button)
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return false;
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return button->checked();
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}));
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// 2. If element is null, return the empty string.
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if (!element)
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return String {};
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// 3. If element is an element with no value attribute, return the string "on".
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// 4. Otherwise, return the value of element's value attribute.
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return element->get_attribute(HTML::AttributeNames::value).value_or("on"_string);
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}
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void RadioNodeList::set_value(FlyString const& value)
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{
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HTML::HTMLInputElement* element = nullptr;
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// 1. If the new value is the string "on": let element be the first element in tree order represented by the RadioNodeList object
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// that is an input element whose type attribute is in the Radio Button state and whose value content attribute is either absent,
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// or present and equal to the new value, if any. If no such element exists, then instead let element be null.
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if (value == "on"sv) {
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element = verify_cast<HTML::HTMLInputElement>(first_matching([&value](auto const& node) {
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auto const* button = radio_button(node);
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if (!button)
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return false;
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auto const maybe_value = button->get_attribute(HTML::AttributeNames::value);
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return !maybe_value.has_value() || maybe_value.value() == value;
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}));
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}
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// 2. Otherwise: let element be the first element in tree order represented by the RadioNodeList object that is an input element whose
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// type attribute is in the Radio Button state and whose value content attribute is present and equal to the new value, if any. If
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// no such element exists, then instead let element be null.
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else {
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element = verify_cast<HTML::HTMLInputElement>(first_matching([&value](auto const& node) {
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auto const* button = radio_button(node);
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if (!button)
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return false;
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auto const maybe_value = button->get_attribute(HTML::AttributeNames::value);
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return maybe_value.has_value() && maybe_value.value() == value;
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}));
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}
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// 3. If element is not null, then set its checkedness to true.
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if (element)
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element->set_checked(true);
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}
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}
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