blob: f0d92cbe55a030cc3301fb6307301e89e32d0a3e [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "core/html/FormAssociatedElement.h"
#include "HTMLNames.h"
#include "core/dom/IdTargetObserver.h"
#include "core/html/HTMLFormControlElement.h"
#include "core/html/HTMLFormElement.h"
#include "core/html/HTMLObjectElement.h"
#include "core/html/ValidityState.h"
namespace WebCore {
using namespace HTMLNames;
class FormAttributeTargetObserver : IdTargetObserver {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<FormAttributeTargetObserver> create(const AtomicString& id, FormAssociatedElement*);
virtual void idTargetChanged() OVERRIDE;
private:
FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement*);
FormAssociatedElement* m_element;
};
FormAssociatedElement::FormAssociatedElement()
: m_form(0)
{
}
FormAssociatedElement::~FormAssociatedElement()
{
// We can't call setForm here because it contains virtual calls.
}
ValidityState* FormAssociatedElement::validity()
{
if (!m_validityState)
m_validityState = ValidityState::create(this);
return m_validityState.get();
}
void FormAssociatedElement::didMoveToNewDocument(Document& oldDocument)
{
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr))
m_formAttributeTargetObserver = nullptr;
}
void FormAssociatedElement::insertedInto(ContainerNode* insertionPoint)
{
if (m_form && insertionPoint->highestAncestor() != m_form->highestAncestor())
setForm(0);
resetFormOwner();
if (!insertionPoint->inDocument())
return;
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr))
resetFormAttributeTargetObserver();
}
void FormAssociatedElement::removedFrom(ContainerNode* insertionPoint)
{
HTMLElement* element = toHTMLElement(this);
if (insertionPoint->inDocument() && element->fastHasAttribute(formAttr))
m_formAttributeTargetObserver = nullptr;
// If the form and element are both in the same tree, preserve the connection to the form.
// Otherwise, null out our form and remove ourselves from the form's list of elements.
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()) {
// The HTML5 spec says that the element should be associated with
// the first element in the document to have an ID that equal to
// the value of form attribute, so we put the result of
// treeScope()->getElementById() over the given element.
HTMLFormElement* newForm = 0;
Element* newFormCandidate = element->treeScope().getElementById(formId);
if (newFormCandidate && newFormCandidate->hasTagName(formTag))
newForm = toHTMLFormElement(newFormCandidate);
return newForm;
}
if (!currentAssociatedForm)
return element->findFormAncestor();
return currentAssociatedForm;
}
void FormAssociatedElement::formRemovedFromTree(const Node* formRoot)
{
ASSERT(m_form);
if (toHTMLElement(this)->highestAncestor() == formRoot)
return;
RefPtr<HTMLElement> protector(toHTMLElement(this));
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(toHTMLElement(this), m_form));
HTMLElement* element = toHTMLElement(this);
if (m_form && m_form != originalForm && m_form->inDocument())
element->document().didAssociateFormControl(element);
}
void FormAssociatedElement::formAttributeChanged()
{
HTMLElement* element = toHTMLElement(this);
if (!element->fastHasAttribute(formAttr)) {
// The form attribute removed. We need to reset form owner here.
HTMLFormElement* originalForm = m_form;
setForm(element->findFormAncestor());
HTMLElement* element = toHTMLElement(this);
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
{
const HTMLElement* element = toHTMLElement(this);
return element->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()
{
ASSERT(toHTMLElement(this)->inDocument());
m_formAttributeTargetObserver = FormAttributeTargetObserver::create(toHTMLElement(this)->fastGetAttribute(formAttr), this);
}
void FormAssociatedElement::formAttributeTargetChanged()
{
resetFormOwner();
}
const AtomicString& FormAssociatedElement::name() const
{
const AtomicString& name = toHTMLElement(this)->getNameAttribute();
return name.isNull() ? emptyAtom : name;
}
bool FormAssociatedElement::isFormControlElementWithState() const
{
return false;
}
const HTMLElement& toHTMLElement(const FormAssociatedElement& associatedElement)
{
if (associatedElement.isFormControlElement())
return toHTMLFormControlElement(associatedElement);
// Assumes the element is an HTMLObjectElement
return toHTMLObjectElement(associatedElement);
}
const HTMLElement* toHTMLElement(const FormAssociatedElement* associatedElement)
{
ASSERT(associatedElement);
return &toHTMLElement(*associatedElement);
}
HTMLElement* toHTMLElement(FormAssociatedElement* associatedElement)
{
return const_cast<HTMLElement*>(toHTMLElement(static_cast<const FormAssociatedElement*>(associatedElement)));
}
HTMLElement& toHTMLElement(FormAssociatedElement& associatedElement)
{
return const_cast<HTMLElement&>(toHTMLElement(static_cast<const FormAssociatedElement&>(associatedElement)));
}
PassOwnPtr<FormAttributeTargetObserver> FormAttributeTargetObserver::create(const AtomicString& id, FormAssociatedElement* element)
{
return adoptPtr(new FormAttributeTargetObserver(id, element));
}
FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement* element)
: IdTargetObserver(toHTMLElement(element)->treeScope().idTargetObserverRegistry(), id)
, m_element(element)
{
}
void FormAttributeTargetObserver::idTargetChanged()
{
m_element->formAttributeTargetChanged();
}
} // namespace Webcore