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LibWeb: Implement the HTMLLabelElement.form attribute

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This returns the form element associated with the given label element's
control or null if the label has no control.
This commit is contained in:
Tim Ledbetter 2024-05-17 06:05:39 +01:00 • committed by Andreas Kling
parent 5296338e7a
commit 6bf22075ed
Notes: sideshowbarker 2024-07-17 00:49:59 +09:00
5 changed files with 60 additions and 1 deletions
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18
Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp
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@ -6,6 +6,7 @@
#include <LibWeb/Bindings/HTMLLabelElementPrototype.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/FormAssociatedElement.h>
#include <LibWeb/HTML/HTMLLabelElement.h>
#include <LibWeb/Layout/Label.h>
@ -66,4 +67,21 @@ JS::GCPtr<HTMLElement> HTMLLabelElement::control() const
return control;
}
// https://html.spec.whatwg.org/multipage/forms.html#dom-label-form
JS::GCPtr<HTMLFormElement> HTMLLabelElement::form() const
{
auto labeled_control = control();
// 1. If the label element has no labeled control, then return null.
if (!labeled_control)
return {};
// 2. If the label element's labeled control is not a form-associated element, then return null.
if (!is<FormAssociatedElement>(*labeled_control))
return {};
// 3. Return the label element's labeled control's form owner (which can still be null).
return dynamic_cast<FormAssociatedElement*>(labeled_control.ptr())->form();
}
}