/**

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

 *

 * Copyright (C) 2000 Peter Kelly (pmk@post.com)

 * Copyright (C) 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 "ProcessingInstruction.h"

#include "CSSStyleSheet.h"

#include "CachedCSSStyleSheet.h"

#include "CachedXSLStyleSheet.h"

#include "Document.h"

#include "DocLoader.h"

#include "ExceptionCode.h"

#include "Frame.h"

#include "FrameLoader.h"

#include "XSLStyleSheet.h"

#include "XMLTokenizer.h" // for parseAttributes()

namespace WebCore {

ProcessingInstruction::ProcessingInstruction(Document* doc)

    : ContainerNode(doc)

    , m_cachedSheet(0)

    , m_loading(false)

#if ENABLE(XSLT)

    , m_isXSL(false)

#endif

{

}

ProcessingInstruction::ProcessingInstruction(Document* doc, const String& target, const String& data)

    : ContainerNode(doc)

    , m_target(target)

    , m_data(data)

    , m_cachedSheet(0)

    , m_loading(false)

#if ENABLE(XSLT)

    , m_isXSL(false)

#endif

{

}

ProcessingInstruction::~ProcessingInstruction()

{

    if (m_cachedSheet)

        m_cachedSheet->deref(this);

}

void ProcessingInstruction::setData(const String& data, ExceptionCode& ec)

{

    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.

    if (isReadOnlyNode()) {

        ec = NO_MODIFICATION_ALLOWED_ERR;

        return;

    }

    m_data = data;

}

String ProcessingInstruction::nodeName() const

{

    return m_target;

}

Node::NodeType ProcessingInstruction::nodeType() const

{

    return PROCESSING_INSTRUCTION_NODE;

}

String ProcessingInstruction::nodeValue() const

{

    return m_data;

}

void ProcessingInstruction::setNodeValue(const String& nodeValue, ExceptionCode& ec)

{

    // NO_MODIFICATION_ALLOWED_ERR: taken care of by setData()

    setData(nodeValue, ec);

}

PassRefPtr<Node> ProcessingInstruction::cloneNode(bool /*deep*/)

{

    // ### copy m_localHref

    return new ProcessingInstruction(document(), m_target, m_data);

}

// DOM Section 1.1.1

bool ProcessingInstruction::childTypeAllowed(NodeType)

{

    return false;

}

bool ProcessingInstruction::checkStyleSheet()

{

    if (m_target == "xml-stylesheet") {

        // see http://www.w3.org/TR/xml-stylesheet/

        // ### support stylesheet included in a fragment of this (or another) document

        // ### make sure this gets called when adding from javascript

        bool attrsOk;

        const HashMap<String, String> attrs = parseAttributes(m_data, attrsOk);

        if (!attrsOk)

            return true;

        HashMap<String, String>::const_iterator i = attrs.find("type");

        String type;

        if (i != attrs.end())

            type = i->second;

        bool isCSS = type.isEmpty() || type == "text/css";

#if ENABLE(XSLT)

        m_isXSL = (type == "text/xml" || type == "text/xsl" || type == "application/xml" ||

                   type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom=xml");

        if (!isCSS && !m_isXSL)

#else

        if (!isCSS)

#endif

            return true;

        String href = attrs.get("href");

        if (href.length() > 1) {

            if (href[0] == '#') {

                m_localHref = href.substring(1);

#if ENABLE(XSLT)

                // We need to make a synthetic XSLStyleSheet that is embedded.  It needs to be able

                // to kick off import/include loads that can hang off some parent sheet.

                if (m_isXSL) {

                    m_sheet = new XSLStyleSheet(this, m_localHref, true);

                    m_loading = false;

                }

                return !m_isXSL;

#endif

            }

            else

            {

                // FIXME: some validation on the URL?

                if (document()->frame()) {

                    m_loading = true;

                    document()->addPendingSheet();

                    if (m_cachedSheet)

                        m_cachedSheet->deref(this);

#if ENABLE(XSLT)

                    if (m_isXSL)

                        m_cachedSheet = document()->docLoader()->requestXSLStyleSheet(document()->completeURL(href));

                    else

#endif

                    {

                        String charset = attrs.get("charset");

                        if (charset.isEmpty())

                            charset = document()->frame()->loader()->encoding();

                        m_cachedSheet = document()->docLoader()->requestCSSStyleSheet(document()->completeURL(href), charset);

                    }

                    if (m_cachedSheet)

                        m_cachedSheet->ref(this);

#if ENABLE(XSLT)

                    return !m_isXSL;

#endif

                }

            }

        }

    }

    return true;

}

bool ProcessingInstruction::isLoading() const

{

    if (m_loading)

        return true;

    if (!m_sheet)

        return false;

    return m_sheet->isLoading();

}

bool ProcessingInstruction::sheetLoaded()

{

    if (!isLoading()) {

        document()->removePendingSheet();

        return true;

    }

    return false;

}

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

{

#if ENABLE(XSLT)

    ASSERT(!m_isXSL);

#endif

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

    parseStyleSheet(sheet);

}

#if ENABLE(XSLT)

void ProcessingInstruction::setXSLStyleSheet(const String& url, const String& sheet)

{

    ASSERT(m_isXSL);

    m_sheet = new XSLStyleSheet(this, url);

    parseStyleSheet(sheet);

}

#endif

void ProcessingInstruction::parseStyleSheet(const String& sheet)

{

    m_sheet->parseString(sheet, true);

    if (m_cachedSheet)

        m_cachedSheet->deref(this);

    m_cachedSheet = 0;

    m_loading = false;

    m_sheet->checkLoaded();

}

String ProcessingInstruction::toString() const

{

    String result = "<?";

    result += m_target;

    result += " ";

    result += m_data;

    result += "?>";

    return result;

}

void ProcessingInstruction::setCSSStyleSheet(CSSStyleSheet* sheet)

{

    ASSERT(!m_cachedSheet);

    ASSERT(!m_loading);

    m_sheet = sheet;

}

bool ProcessingInstruction::offsetInCharacters() const

{

    return true;

}

} // namespace