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LibWeb: Implement the HTMLInputElement.list attribute

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This returns the `HTMLDataListElement` pointed to by the `list`
content attribute.
This commit is contained in:
Tim Ledbetter 2025-03-03 15:23:48 +00:00 • committed by Tim Ledbetter
parent a37315da87
commit 6178557a07
Notes: github-actions[bot] 2025-03-09 15:11:49 +00:00
7 changed files with 164 additions and 1 deletions
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34
Libraries/LibWeb/HTML/HTMLInputElement.cpp
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@ -32,6 +32,7 @@
#include <LibWeb/HTML/Dates.h>
#include <LibWeb/HTML/DecodedImageData.h>
#include <LibWeb/HTML/EventNames.h>
#include <LibWeb/HTML/HTMLDataListElement.h>
#include <LibWeb/HTML/HTMLDivElement.h>
#include <LibWeb/HTML/HTMLFormElement.h>
#include <LibWeb/HTML/HTMLInputElement.h>
@ -190,6 +191,39 @@ void HTMLInputElement::set_indeterminate(bool value)
m_indeterminate = value;
}
// https://html.spec.whatwg.org/multipage/input.html#dom-input-list
GC::Ptr<HTMLDataListElement const> HTMLInputElement::list() const
{
// The list IDL attribute must return the current suggestions source element, if any, or null otherwise.
if (auto data_list_element = suggestions_source_element(); data_list_element.has_value())
return *data_list_element;
return nullptr;
}
// https://html.spec.whatwg.org/multipage/input.html#concept-input-list
Optional<GC::Ref<HTMLDataListElement const>> HTMLInputElement::suggestions_source_element() const
{
// The suggestions source element is the first element in the tree in tree order to have an ID equal to the value of the list attribute,
// if that element is a datalist element. If there is no list attribute, or if there is no element with that ID,
// or if the first element with that ID is not a datalist element, then there is no suggestions source element.
Optional<GC::Ref<HTMLDataListElement const>> result;
if (auto list_attribute_value = get_attribute(HTML::AttributeNames::list); list_attribute_value.has_value()) {
root().for_each_in_inclusive_subtree_of_type<DOM::Element>([&](auto& element) {
if (element.id() == *list_attribute_value) {
if (auto data_list_element = as_if<HTMLDataListElement>(element))
result = *data_list_element;
return TraversalDecision::Break;
}
return TraversalDecision::Continue;
});
}
return result;
}
// https://html.spec.whatwg.org/multipage/input.html#compiled-pattern-regular-expression
Optional<Regex<ECMA262>> HTMLInputElement::compiled_pattern_regular_expression() const
{