/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 */

#ifndef LabelableElement_h
#define LabelableElement_h

#include "HTMLElement.h"

namespace WebCore {

// LabelableElement represents "labelable element" defined in the HTML
// specification, and provides the implementation of the "labels" attribute.
class LabelableElement : public HTMLElement {
public:
    virtual ~LabelableElement();
    PassRefPtr<NodeList> labels();
    virtual bool supportLabels() const { return false; }

protected:
    LabelableElement(const QualifiedName& tagName, Document*);

private:
    virtual bool isLabelable() const OVERRIDE FINAL { return true; }
};

inline bool isLabelableElement(const Node* node)
{
    if (!node->isHTMLElement())
        return false;
    return static_cast<const HTMLElement*>(node)->isLabelable();
}

inline bool isLabelableElement(const Node& node)
{
    if (!node.isHTMLElement())
        return false;
    return static_cast<const HTMLElement&>(node).isLabelable();
}

inline bool isLabelableElement(const HTMLElement* element)
{
    return element->isLabelable();
}

inline bool isLabelableElement(const HTMLElement& element)
{
    return element.isLabelable();
}

template <typename ArgType>
struct ElementTypeCastTraits<const LabelableElement, ArgType> {
    static bool is(ArgType& node) { return isLabelableElement(node); }
};

} // namespace WebCore

#endif
