FormAssociatedElement.cpp [plain text]
#include "config.h"
#include "FormAssociatedElement.h"
#include "EditorClient.h"
#include "FormController.h"
#include "Frame.h"
#include "HTMLFormControlElement.h"
#include "HTMLFormElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "IdTargetObserver.h"
namespace WebCore {
using namespace HTMLNames;
class FormAttributeTargetObserver final : private IdTargetObserver {
WTF_MAKE_FAST_ALLOCATED;
public:
FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement&);
private:
virtual void idTargetChanged() override;
FormAssociatedElement& m_element;
};
FormAssociatedElement::FormAssociatedElement()
: m_form(nullptr)
{
}
FormAssociatedElement::~FormAssociatedElement()
{
setForm(nullptr);
}
void FormAssociatedElement::didMoveToNewDocument(Document* oldDocument)
{
HTMLElement& element = asHTMLElement();
if (oldDocument && element.fastHasAttribute(formAttr))
resetFormAttributeTargetObserver();
}
void FormAssociatedElement::insertedInto(ContainerNode& insertionPoint)
{
if (!insertionPoint.inDocument())
return;
HTMLElement& element = asHTMLElement();
if (element.fastHasAttribute(formAttr))
resetFormAttributeTargetObserver();
}
void FormAssociatedElement::removedFrom(ContainerNode& insertionPoint)
{
HTMLElement& element = asHTMLElement();
if (insertionPoint.inDocument() && element.fastHasAttribute(formAttr))
m_formAttributeTargetObserver = nullptr;
if (m_form && element.highestAncestor() != m_form->highestAncestor())
setForm(0);
}
HTMLFormElement* FormAssociatedElement::findAssociatedForm(const HTMLElement* element, HTMLFormElement* currentAssociatedForm)
{
const AtomicString& formId(element->fastGetAttribute(formAttr));
if (!formId.isNull() && element->inDocument()) {
HTMLFormElement* newForm = nullptr;
Element* newFormCandidate = element->treeScope().getElementById(formId);
if (is<HTMLFormElement>(newFormCandidate))
newForm = downcast<HTMLFormElement>(newFormCandidate);
return newForm;
}
if (!currentAssociatedForm)
return HTMLFormElement::findClosestFormAncestor(*element);
return currentAssociatedForm;
}
void FormAssociatedElement::formRemovedFromTree(const Node* formRoot)
{
ASSERT(m_form);
if (asHTMLElement().highestAncestor() != formRoot)
setForm(0);
}
void FormAssociatedElement::setForm(HTMLFormElement* newForm)
{
if (m_form == newForm)
return;
willChangeForm();
if (m_form)
m_form->removeFormElement(this);
m_form = newForm;
if (m_form)
m_form->registerFormElement(this);
didChangeForm();
}
void FormAssociatedElement::willChangeForm()
{
}
void FormAssociatedElement::didChangeForm()
{
}
void FormAssociatedElement::formWillBeDestroyed()
{
ASSERT(m_form);
if (!m_form)
return;
willChangeForm();
m_form = 0;
didChangeForm();
}
void FormAssociatedElement::resetFormOwner()
{
HTMLFormElement* originalForm = m_form;
setForm(findAssociatedForm(&asHTMLElement(), m_form));
HTMLElement& element = asHTMLElement();
if (m_form && m_form != originalForm && m_form->inDocument())
element.document().didAssociateFormControl(&element);
}
void FormAssociatedElement::formAttributeChanged()
{
HTMLElement& element = asHTMLElement();
if (!element.fastHasAttribute(formAttr)) {
HTMLFormElement* originalForm = m_form;
setForm(HTMLFormElement::findClosestFormAncestor(element));
if (m_form && m_form != originalForm && m_form->inDocument())
element.document().didAssociateFormControl(&element);
m_formAttributeTargetObserver = nullptr;
} else {
resetFormOwner();
if (element.inDocument())
resetFormAttributeTargetObserver();
}
}
bool FormAssociatedElement::customError() const
{
return willValidate() && !m_customValidationMessage.isEmpty();
}
bool FormAssociatedElement::hasBadInput() const
{
return false;
}
bool FormAssociatedElement::patternMismatch() const
{
return false;
}
bool FormAssociatedElement::rangeOverflow() const
{
return false;
}
bool FormAssociatedElement::rangeUnderflow() const
{
return false;
}
bool FormAssociatedElement::stepMismatch() const
{
return false;
}
bool FormAssociatedElement::tooLong() const
{
return false;
}
bool FormAssociatedElement::typeMismatch() const
{
return false;
}
bool FormAssociatedElement::valid() const
{
bool someError = typeMismatch() || stepMismatch() || rangeUnderflow() || rangeOverflow()
|| tooLong() || patternMismatch() || valueMissing() || hasBadInput() || customError();
return !someError;
}
bool FormAssociatedElement::valueMissing() const
{
return false;
}
String FormAssociatedElement::customValidationMessage() const
{
return m_customValidationMessage;
}
String FormAssociatedElement::validationMessage() const
{
return customError() ? m_customValidationMessage : String();
}
void FormAssociatedElement::setCustomValidity(const String& error)
{
m_customValidationMessage = error;
}
void FormAssociatedElement::resetFormAttributeTargetObserver()
{
m_formAttributeTargetObserver = std::make_unique<FormAttributeTargetObserver>(asHTMLElement().fastGetAttribute(formAttr), *this);
}
void FormAssociatedElement::formAttributeTargetChanged()
{
resetFormOwner();
}
const AtomicString& FormAssociatedElement::name() const
{
const AtomicString& name = asHTMLElement().getNameAttribute();
return name.isNull() ? emptyAtom : name;
}
bool FormAssociatedElement::isFormControlElementWithState() const
{
return false;
}
FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement& element)
: IdTargetObserver(element.asHTMLElement().treeScope().idTargetObserverRegistry(), id)
, m_element(element)
{
}
void FormAttributeTargetObserver::idTargetChanged()
{
m_element.formAttributeTargetChanged();
}
}