/*
 * Copyright (C) 2008 Apple 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef OpaqueJSString_h
#define OpaqueJSString_h

#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/text/WTFString.h>

namespace JSC {
    class Identifier;
    class VM;
}

struct OpaqueJSString : public ThreadSafeRefCounted<OpaqueJSString> {

    static PassRefPtr<OpaqueJSString> create() // null
    {
        return adoptRef(new OpaqueJSString);
    }

    static PassRefPtr<OpaqueJSString> create(const LChar* characters, unsigned length)
    {
        return adoptRef(new OpaqueJSString(characters, length));
    }

    static PassRefPtr<OpaqueJSString> create(const UChar* characters, unsigned length)
    {
        return adoptRef(new OpaqueJSString(characters, length));
    }

    JS_EXPORT_PRIVATE static PassRefPtr<OpaqueJSString> create(const String&);

    const UChar* characters() { return !!this ? m_string.characters() : 0; }
    unsigned length() { return !!this ? m_string.length() : 0; }

    JS_EXPORT_PRIVATE String string() const;
    JSC::Identifier identifier(JSC::VM*) const;
#if PLATFORM(QT)
    QString qString() const { return m_string; }
#endif

private:
    friend class WTF::ThreadSafeRefCounted<OpaqueJSString>;

    OpaqueJSString()
    {
    }

    OpaqueJSString(const String& string)
        : m_string(string.isolatedCopy())
    {
    }

    OpaqueJSString(const LChar* characters, unsigned length)
    {
        m_string = String(characters, length);
    }

    OpaqueJSString(const UChar* characters, unsigned length)
    {
        m_string = String(characters, length);
    }

    String m_string;
};

#endif