/**

 * This file is part of the DOM implementation for KDE.

 *

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

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

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

 *

 * 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 "CSSImportRule.h"

#include "CachedCSSStyleSheet.h"

#include "CSSStyleSheet.h"

#include "DocLoader.h"

#include "Document.h"

#include "KURL.h"

#include "MediaList.h"

namespace WebCore {

CSSImportRule::CSSImportRule(StyleBase* parent, const String& href, MediaList* media)

    : CSSRule(parent)

    , m_strHref(href)

    , m_lstMedia(media)

    , m_cachedSheet(0)

    , m_loading(false)

{

    if (m_lstMedia)

        m_lstMedia->setParent(this);

    else

        m_lstMedia = new MediaList(this, String());

}

CSSImportRule::~CSSImportRule()

{

    if (m_lstMedia)

        m_lstMedia->setParent(0);

    if (m_styleSheet)

        m_styleSheet->setParent(0);

    if (m_cachedSheet)

        m_cachedSheet->deref(this);

}

void CSSImportRule::setCSSStyleSheet(const String& url, const String& charset, const String& sheet)

{

    if (m_styleSheet)

        m_styleSheet->setParent(0);

    m_styleSheet = new CSSStyleSheet(this, url, charset);

    CSSStyleSheet* parent = parentStyleSheet();

    m_styleSheet->parseString(sheet, !parent || parent->useStrictParsing());

    m_loading = false;

    checkLoaded();

}

bool CSSImportRule::isLoading() const

{

    return m_loading || (m_styleSheet && m_styleSheet->isLoading());

}

void CSSImportRule::insertedIntoParent()

{

    StyleBase* root = this;

    StyleBase* parent;

    while ((parent = root->parent()))

        root = parent;

    if (!root->isCSSStyleSheet())

        return;

    DocLoader* docLoader = static_cast<CSSStyleSheet*>(root)->docLoader();

    if (!docLoader)

        return;

    String absHref = m_strHref;

    CSSStyleSheet* parentSheet = parentStyleSheet();

    if (!parentSheet->href().isNull())

        // use parent styleheet's URL as the base URL

        absHref = KURL(parentSheet->href().deprecatedString(), m_strHref.deprecatedString()).url();

    // Check for a cycle in our import chain.  If we encounter a stylesheet

    // in our parent chain with the same URL, then just bail.

    for (parent = static_cast<StyleBase*>(this)->parent(); parent; parent = parent->parent()) {

        if (absHref == parent->baseURL())

            return;

    }

    m_cachedSheet = docLoader->requestCSSStyleSheet(absHref, parentSheet->charset());

    if (m_cachedSheet) {

        // if the import rule is issued dynamically, the sheet may be

        // removed from the pending sheet count, so let the doc know

        // the sheet being imported is pending.

        if (parentSheet && parentSheet->loadCompleted() && parentSheet->doc())

            parentSheet->doc()->addPendingSheet();

        m_loading = true;

        m_cachedSheet->ref(this);

    }

}

String CSSImportRule::cssText() const

{

    String result = "@import url(\"";

    result += m_strHref;

    result += "\")";

    if (m_lstMedia) {

        result += " ";

        result += m_lstMedia->mediaText();

    }

    result += ";";

    return result;

}

} // namespace WebCore