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LibWeb: Support HTMLFormElement.elements and HTMLFormElement.length

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Note that we implement .elements as a HTMLCollection for now, instead of
the correct HTMLFormControlsCollection subclass. This covers most
use-cases already.

1% progression on ACID3. :^)
This commit is contained in:
Andreas Kling 2022-02-25 21:19:06 +01:00
parent fbee0490a3
commit fa17776a51
3 changed files with 51 additions and 0 deletions
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42
Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
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@ -8,8 +8,14 @@
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/HTML/EventNames.h>
#include <LibWeb/HTML/HTMLButtonElement.h>
#include <LibWeb/HTML/HTMLFieldSetElement.h>
#include <LibWeb/HTML/HTMLFormElement.h>
#include <LibWeb/HTML/HTMLInputElement.h>
#include <LibWeb/HTML/HTMLObjectElement.h>
#include <LibWeb/HTML/HTMLOutputElement.h>
#include <LibWeb/HTML/HTMLSelectElement.h>
#include <LibWeb/HTML/HTMLTextAreaElement.h>
#include <LibWeb/HTML/SubmitEvent.h>
#include <LibWeb/Page/Page.h>
#include <LibWeb/URL/URL.h>
@ -152,4 +158,40 @@ String HTMLFormElement::action() const
return value;
}
static bool is_form_control(DOM::Element const& element)
{
if (is<HTMLButtonElement>(element)
|| is<HTMLFieldSetElement>(element)
|| is<HTMLObjectElement>(element)
|| is<HTMLOutputElement>(element)
|| is<HTMLSelectElement>(element)
|| is<HTMLTextAreaElement>(element)) {
return true;
}
if (is<HTMLInputElement>(element)
&& !element.get_attribute(HTML::AttributeNames::type).equals_ignoring_case("image")) {
return true;
}
return false;
}
// https://html.spec.whatwg.org/multipage/forms.html#dom-form-elements
NonnullRefPtr<DOM::HTMLCollection> HTMLFormElement::elements() const
{
// FIXME: This should return the same HTMLFormControlsCollection object every time,
// but that would cause a reference cycle since HTMLCollection refs the root.
return DOM::HTMLCollection::create(const_cast<HTMLFormElement&>(*this), [this](Element const& element) {
return is_form_control(element);
});
}
// https://html.spec.whatwg.org/multipage/forms.html#dom-form-length
unsigned HTMLFormElement::length() const
{
// The length IDL attribute must return the number of nodes represented by the elements collection.
return elements()->length();
}
}