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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, 2010 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 "HTMLLabelElement.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "HTMLFormControlElement.h"
#include "HTMLFormElement.h"
#include "HTMLNames.h"
namespace WebCore {
using namespace HTMLNames;
static HTMLFormControlElement* nodeAsLabelableFormControl(Node* node)
{
if (!node || !node->isElementNode() || !static_cast<Element*>(node)->isFormControlElement())
return 0;
HTMLFormControlElement* formControlElement = static_cast<HTMLFormControlElement*>(node);
if (!formControlElement->isLabelable())
return 0;
return formControlElement;
}
inline HTMLLabelElement::HTMLLabelElement(const QualifiedName& tagName, Document* document)
: HTMLElement(tagName, document)
{
ASSERT(hasTagName(labelTag));
}
PassRefPtr<HTMLLabelElement> HTMLLabelElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new HTMLLabelElement(tagName, document));
}
bool HTMLLabelElement::isFocusable() const
{
return false;
}
HTMLFormControlElement* HTMLLabelElement::control()
{
const AtomicString& controlId = getAttribute(forAttr);
if (controlId.isNull()) {
// Search the children and descendants of the label element for a form element.
// per http://dev.w3.org/html5/spec/Overview.html#the-label-element
// the form element must be "labelable form-associated element".
Node* node = this;
while ((node = node->traverseNextNode(this))) {
if (HTMLFormControlElement* formControlElement = nodeAsLabelableFormControl(node))
return formControlElement;
}
return 0;
}
// Find the first element whose id is controlId. If it is found and it is a labelable form control,
// return it, otherwise return 0.
return nodeAsLabelableFormControl(document()->getElementById(controlId));
}
void HTMLLabelElement::setActive(bool down, bool pause)
{
if (down == active())
return;
// Update our status first.
HTMLElement::setActive(down, pause);
// Also update our corresponding control.
if (HTMLElement* element = control())
element->setActive(down, pause);
}
void HTMLLabelElement::setHovered(bool over)
{
if (over == hovered())
return;
// Update our status first.
HTMLElement::setHovered(over);
// Also update our corresponding control.
if (HTMLElement* element = control())
element->setHovered(over);
}
void HTMLLabelElement::defaultEventHandler(Event* evt)
{
static bool processingClick = false;
if (evt->type() == eventNames().clickEvent && !processingClick) {
RefPtr<HTMLElement> element = control();
// If we can't find a control or if the control received the click
// event, then there's no need for us to do anything.
if (!element || (evt->target() && element->containsIncludingShadowDOM(evt->target()->toNode())))
return;
processingClick = true;
// Click the corresponding control.
element->dispatchSimulatedClick(evt);
// If the control can be focused via the mouse, then do that too.
if (element->isMouseFocusable())
element->focus();
processingClick = false;
evt->setDefaultHandled();
}
HTMLElement::defaultEventHandler(evt);
}
void HTMLLabelElement::focus(bool)
{
// to match other browsers, always restore previous selection
if (HTMLElement* element = control())
element->focus();
}
void HTMLLabelElement::accessKeyAction(bool sendToAnyElement)
{
if (HTMLElement* element = control())
element->accessKeyAction(sendToAnyElement);
else
HTMLElement::accessKeyAction(sendToAnyElement);
}
void HTMLLabelElement::parseMappedAttribute(Attribute* attribute)
{
if (attribute->name() == forAttr) {
// htmlFor attribute change affects other nodes than this.
// Clear the caches to ensure that the labels caches are cleared.
if (document())
document()->notifyLocalNodeListsLabelChanged();
} else
HTMLElement::parseMappedAttribute(attribute);
}
} // namespace
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