/**

 * (C) 1999-2003 Lars Knoll (knoll@kde.org)

 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2002, 2005, 2006 Apple Computer, Inc.

 * Copyright (C) 2006 Samuel Weinig (sam@webkit.org)

 *

 * 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 "CSSMediaRule.h"

#include "CSSParser.h"

#include "ExceptionCode.h"

namespace WebCore {

CSSMediaRule::CSSMediaRule(CSSStyleSheet* parent, PassRefPtr<MediaList> media, PassRefPtr<CSSRuleList> rules)

    : CSSRule(parent)

    , m_lstMedia(media)

    , m_lstCSSRules(rules)

{

}

CSSMediaRule::~CSSMediaRule()

{

    if (m_lstMedia)

        m_lstMedia->setParent(0);

    int length = m_lstCSSRules->length();

    for (int i = 0; i < length; i++)

        m_lstCSSRules->item(i)->setParent(0);

}

unsigned CSSMediaRule::append(CSSRule* rule)

{

    if (!rule)

        return 0;

    rule->setParent(this);

    return m_lstCSSRules->insertRule(rule, m_lstCSSRules->length());

}

unsigned CSSMediaRule::insertRule(const String& rule, unsigned index, ExceptionCode& ec)

{

    if (index > m_lstCSSRules->length()) {

        // INDEX_SIZE_ERR: Raised if the specified index is not a valid insertion point.

        ec = INDEX_SIZE_ERR;

        return 0;

    }

    CSSParser p(useStrictParsing());

    RefPtr<CSSRule> newRule = p.parseRule(parentStyleSheet(), rule);

    if (!newRule) {

        // SYNTAX_ERR: Raised if the specified rule has a syntax error and is unparsable.

        ec = SYNTAX_ERR;

        return 0;

    }

    if (newRule->isImportRule()) {

        // FIXME: an HIERARCHY_REQUEST_ERR should also be thrown for a @charset or a nested

        // @media rule.  They are currently not getting parsed, resulting in a SYNTAX_ERR

        // to get raised above.

        // HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified

        // index, e.g., if an @import rule is inserted after a standard rule set or other

        // at-rule.

        ec = HIERARCHY_REQUEST_ERR;

        return 0;

    }

    newRule->setParent(this);

    unsigned returnedIndex = m_lstCSSRules->insertRule(newRule.get(), index);

    // stylesheet() can only return 0 for computed style declarations.

    stylesheet()->styleSheetChanged();

    return returnedIndex;

}

void CSSMediaRule::deleteRule(unsigned index, ExceptionCode& ec)

{

    if (index >= m_lstCSSRules->length()) {

        // INDEX_SIZE_ERR: Raised if the specified index does not correspond to a

        // rule in the media rule list.

        ec = INDEX_SIZE_ERR;

        return;

    }

    m_lstCSSRules->deleteRule(index);

    // stylesheet() can only return 0 for computed style declarations.

    stylesheet()->styleSheetChanged();

}

String CSSMediaRule::cssText() const

{

    String result = "@media ";

    if (m_lstMedia) {

        result += m_lstMedia->mediaText();

        result += " ";

    }

    result += "{ \n";

    if (m_lstCSSRules) {

        unsigned len = m_lstCSSRules->length();

        for (unsigned i = 0; i < len; i++) {

            result += "  ";

            result += m_lstCSSRules->item(i)->cssText();

            result += "\n";

        }

    }

    result += "}";

    return result;

}

} // namespace WebCore