/*

 * CSS Media Query

 *

 * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * 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 THE AUTHOR ``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. 

 */

#include "config.h"

#include "MediaQueryExp.h"

#include "CSSParser.h"

#include "CSSPrimitiveValue.h"

#include "CSSValueList.h"

#include "StringBuilder.h"

namespace WebCore {

MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)

    : m_mediaFeature(mediaFeature)

    , m_value(0)

    , m_isValid(true)

{

    if (valueList) {

        if (valueList->size() == 1) {

            CSSParserValue* value = valueList->current();

            if (value->id != 0)

                m_value = CSSPrimitiveValue::createIdentifier(value->id);

            else if (value->unit == CSSPrimitiveValue::CSS_STRING)

                m_value = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);

            else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER &&

                      value->unit <= CSSPrimitiveValue::CSS_KHZ)

                m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);

            valueList->next();

        } else if (valueList->size() > 1) {

            // create list of values

            // currently accepts only <integer>/<integer>

            RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();

            CSSParserValue* value = 0;

            bool isValid = true;

            while ((value = valueList->current()) && isValid) {

                if (value->unit == CSSParserValue::Operator && value->iValue == '/')

                    list->append(CSSPrimitiveValue::create("/", CSSPrimitiveValue::CSS_STRING));

                else if (value->unit == CSSPrimitiveValue::CSS_NUMBER)

                    list->append(CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER));

                else

                    isValid = false;

                value = valueList->next();

            }

            if (isValid)

                m_value = list.release();

        }

        m_isValid = m_value;

    }

}

MediaQueryExp::~MediaQueryExp()

{

}

String MediaQueryExp::serialize() const

{

    if (!m_serializationCache.isNull())

        return m_serializationCache;

    StringBuilder result;

    result.append("(");

    result.append(m_mediaFeature.lower());

    if (m_value) {

        result.append(": ");

        result.append(m_value->cssText());

    }

    result.append(")");

    const_cast<MediaQueryExp*>(this)->m_serializationCache = result.toString();

    return m_serializationCache;

}

} // namespace