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/*
* 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 "FormAssociatedElement.h"
#include "HTMLFormControlElement.h"
#include "HTMLFormElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "ValidityState.h"
namespace WebCore {
using namespace HTMLNames;
FormAssociatedElement::FormAssociatedElement(HTMLFormElement* form)
: m_form(form)
{
}
FormAssociatedElement::~FormAssociatedElement()
{
}
ValidityState* FormAssociatedElement::validity()
{
if (!m_validityState)
m_validityState = ValidityState::create(this);
return m_validityState.get();
}
void FormAssociatedElement::willMoveToNewOwnerDocument()
{
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr))
element->document()->unregisterFormElementWithFormAttribute(this);
}
void FormAssociatedElement::insertedIntoDocument()
{
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr))
element->document()->registerFormElementWithFormAttribute(this);
}
void FormAssociatedElement::removedFromDocument()
{
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr))
element->document()->unregisterFormElementWithFormAttribute(this);
}
void FormAssociatedElement::insertedIntoTree()
{
HTMLElement* element = toHTMLElement(this);
if (element->fastHasAttribute(formAttr)) {
Element* formElement = element->document()->getElementById(element->fastGetAttribute(formAttr));
if (formElement && formElement->hasTagName(formTag)) {
if (m_form)
m_form->removeFormElement(this);
m_form = static_cast<HTMLFormElement*>(formElement);
m_form->registerFormElement(this);
}
}
if (!m_form) {
// This handles the case of a new form element being created by
// JavaScript and inserted inside a form. In the case of the parser
// setting a form, we will already have a non-null value for m_form,
// and so we don't need to do anything.
m_form = element->findFormAncestor();
if (m_form)
m_form->registerFormElement(this);
}
}
static inline Node* findRoot(Node* n)
{
Node* root = n;
for (; n; n = n->parentNode())
root = n;
return root;
}
void FormAssociatedElement::removedFromTree()
{
HTMLElement* element = toHTMLElement(this);
// 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 && findRoot(element) != findRoot(m_form))
removeFromForm();
}
void FormAssociatedElement::removeFromForm()
{
if (!m_form)
return;
m_form->removeFormElement(this);
m_form = 0;
}
void FormAssociatedElement::resetFormOwner(HTMLFormElement* form)
{
HTMLElement* element = toHTMLElement(this);
const AtomicString& formId(element->fastGetAttribute(formAttr));
if (m_form) {
if (formId.isNull())
return;
m_form->removeFormElement(this);
}
m_form = 0;
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
// document()->getElementById() over the given element.
Element* firstElement = element->document()->getElementById(formId);
if (firstElement && firstElement->hasTagName(formTag))
m_form = static_cast<HTMLFormElement*>(firstElement);
else
m_form = form;
} else
m_form = element->findFormAncestor();
if (m_form)
m_form->registerFormElement(this);
}
void FormAssociatedElement::formAttributeChanged()
{
HTMLElement* element = toHTMLElement(this);
if (!element->fastHasAttribute(formAttr)) {
// The form attribute removed. We need to reset form owner here.
if (m_form)
m_form->removeFormElement(this);
m_form = element->findFormAncestor();
if (m_form)
form()->registerFormElement(this);
element->document()->unregisterFormElementWithFormAttribute(this);
} else
resetFormOwner(0);
}
const HTMLElement* toHTMLElement(const FormAssociatedElement* associatedElement)
{
if (associatedElement->isFormControlElement())
return static_cast<const HTMLFormControlElement*>(associatedElement);
// Assumes the element is an HTMLObjectElement
const HTMLElement* element = static_cast<const HTMLObjectElement*>(associatedElement);
ASSERT(element->hasTagName(objectTag));
return element;
}
HTMLElement* toHTMLElement(FormAssociatedElement* associatedElement)
{
return const_cast<HTMLElement*>(toHTMLElement(static_cast<const FormAssociatedElement*>(associatedElement)));
}
} // namespace Webcore
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