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LibWeb: Implement value attribute of RadioNodeList

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Shannon Booth 2023-08-25 12:28:36 +12:00 • committed by Andreas Kling
parent 708263790a
commit f115e44066
5 changed files with 180 additions and 1 deletions
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77
Userland/Libraries/LibWeb/DOM/RadioNodeList.cpp
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@ -8,6 +8,7 @@
#include <LibWeb/Bindings/RadioNodeListPrototype.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/RadioNodeList.h>
#include <LibWeb/HTML/HTMLInputElement.h>
namespace Web::DOM {
@ -29,4 +30,80 @@ void RadioNodeList::initialize(JS::Realm& realm)
set_prototype(&Bindings::ensure_web_prototype<Bindings::RadioNodeListPrototype>(realm, "RadioNodeList"));
}
static HTML::HTMLInputElement const* radio_button(Node const& node)
{
if (!is<HTML::HTMLInputElement>(node))
return nullptr;
auto const& input_element = verify_cast<HTML::HTMLInputElement>(node);
if (input_element.type_state() != HTML::HTMLInputElement::TypeAttributeState::RadioButton)
return nullptr;
return &input_element;
}
// https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#dom-radionodelist-value
FlyString RadioNodeList::value() const
{
// 1. Let element be the first element in tree order represented by the RadioNodeList object that is an input element whose type
// attribute is in the Radio Button state and whose checkedness is true. Otherwise, let it be null.
auto* element = verify_cast<HTML::HTMLInputElement>(first_matching([](Node const& node) -> bool {
auto const* button = radio_button(node);
if (!button)
return false;
return button->checked();
}));
// 2. If element is null, return the empty string.
if (!element)
return String {};
// 3. If element is an element with no value attribute, return the string "on".
auto const value = element->get_attribute(HTML::AttributeNames::value);
if (value.is_null())
return "on"_fly_string;
// 4. Otherwise, return the value of element's value attribute.
return MUST(FlyString::from_deprecated_fly_string(value));
}
void RadioNodeList::set_value(FlyString const& value)
{
HTML::HTMLInputElement* element = nullptr;
auto deprecated_value = value.to_deprecated_fly_string();
// 1. If the new value is the string "on": let element be the first element in tree order represented by the RadioNodeList object
// that is an input element whose type attribute is in the Radio Button state and whose value content attribute is either absent,
// or present and equal to the new value, if any. If no such element exists, then instead let element be null.
if (value == "on"sv) {
element = verify_cast<HTML::HTMLInputElement>(first_matching([&deprecated_value](auto const& node) {
auto const* button = radio_button(node);
if (!button)
return false;
auto const value = button->get_attribute(HTML::AttributeNames::value);
return value.is_null() || value == deprecated_value;
}));
}
// 2. Otherwise: let element be the first element in tree order represented by the RadioNodeList object that is an input element whose
// type attribute is in the Radio Button state and whose value content attribute is present and equal to the new value, if any. If
// no such element exists, then instead let element be null.
else {
element = verify_cast<HTML::HTMLInputElement>(first_matching([&deprecated_value](auto const& node) {
auto const* button = radio_button(node);
if (!button)
return false;
auto const value = button->get_attribute(HTML::AttributeNames::value);
return !value.is_null() && value == deprecated_value;
}));
}
// 3. If element is not null, then set its checkedness to true.
if (element)
element->set_checked(true);
}
}