/*

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

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 *           (C) 2001 Peter Kelly (pmk@post.com)

 *           (C) 2001 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.

 *

 * 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 "Attr.h"

#include "Document.h"

#include "Element.h"

#include "ExceptionCode.h"

#include "Text.h"

namespace WebCore {

Attr::Attr(Element* element, Document* docPtr, Attribute* a)

    : ContainerNode(docPtr),

      m_element(element),

      m_attribute(a),

      m_ignoreChildrenChanged(0)

{

    ASSERT(!m_attribute->attr());

    m_attribute->m_impl = this;

    m_attrWasSpecifiedOrElementHasRareData = true;

}

Attr::~Attr()

{

    ASSERT(m_attribute->attr() == this);

    m_attribute->m_impl = 0;

}

void Attr::createTextChild()

{

    ASSERT(refCount());

    if (!m_attribute->value().isEmpty()) {

        RefPtr<Text> textNode = document()->createTextNode(m_attribute->value().impl());

        // This does everything appendChild() would do in this situation (assuming m_ignoreChildrenChanged was set),

        // but much more efficiently.

        textNode->setParent(this);

        setFirstChild(textNode.get());

        setLastChild(textNode.get());

    }

}

String Attr::nodeName() const

{

    return name();

}

Node::NodeType Attr::nodeType() const

{

    return ATTRIBUTE_NODE;

}

const AtomicString& Attr::localName() const

{

    return m_attribute->localName();

}

const AtomicString& Attr::namespaceURI() const

{

    return m_attribute->namespaceURI();

}

const AtomicString& Attr::prefix() const

{

    return m_attribute->prefix();

}

void Attr::setPrefix(const AtomicString &_prefix, ExceptionCode& ec)

{

    checkSetPrefix(_prefix, ec);

    if (ec)

        return;

    m_attribute->setPrefix(_prefix);

}

String Attr::nodeValue() const

{

    return value();

}

void Attr::setValue( const String& v, ExceptionCode& ec)

{

    ec = 0;

    // do not interprete entities in the string, its literal!

    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly

    if (isReadOnlyNode()) {

        ec = NO_MODIFICATION_ALLOWED_ERR;

        return;

    }

    int e = 0;

    m_ignoreChildrenChanged++;

    removeChildren();

    appendChild(document()->createTextNode(v.impl()), e);

    m_ignoreChildrenChanged--;

    m_attribute->setValue(v.impl());

    if (m_element)

        m_element->attributeChanged(m_attribute.get());

}

void Attr::setNodeValue(const String& v, ExceptionCode& ec)

{

    // NO_MODIFICATION_ALLOWED_ERR: taken care of by setValue()

    setValue(v, ec);

}

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

{

    RefPtr<Attr> clone = new Attr(0, document(), m_attribute->clone());

    cloneChildNodes(clone.get());

    return clone.release();

}

// DOM Section 1.1.1

bool Attr::childTypeAllowed(NodeType type)

{

    switch (type) {

        case TEXT_NODE:

        case ENTITY_REFERENCE_NODE:

            return true;

        default:

            return false;

    }

}

void Attr::childrenChanged()

{

    Node::childrenChanged();

    if (m_ignoreChildrenChanged > 0)

        return;

    // FIXME: We should include entity references in the value

    String val = "";

    for (Node *n = firstChild(); n; n = n->nextSibling()) {

        if (n->isTextNode())

            val += static_cast<Text *>(n)->data();

    }

    m_attribute->setValue(val.impl());

    if (m_element)

        m_element->attributeChanged(m_attribute.get());

}

String Attr::toString() const

{

    String result;

    result += nodeName();

    // FIXME: substitute entities for any instances of " or ' --

    // maybe easier to just use text value and ignore existing

    // entity refs?

    if (firstChild() != NULL) {

        result += "=\"";

        for (Node *child = firstChild(); child != NULL; child = child->nextSibling()) {

            result += child->toString();

        }

        result += "\"";

    }

    return result;

}

}