/*

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

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

 *           (C) 2000 Simon Hausmann (hausmann@kde.org)

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

 * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.

 * Copyright (C) 2009 Ericsson AB. 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 "HTMLIFrameElement.h"

#include "Attribute.h"

#include "CSSPropertyNames.h"

#include "Frame.h"

#include "HTMLDocument.h"

#include "HTMLNames.h"

#include "RenderIFrame.h"

namespace WebCore {

using namespace HTMLNames;

inline HTMLIFrameElement::HTMLIFrameElement(const QualifiedName& tagName, Document* document)

    : HTMLFrameElementBase(tagName, document)

{

    ASSERT(hasTagName(iframeTag));

}

PassRefPtr<HTMLIFrameElement> HTMLIFrameElement::create(const QualifiedName& tagName, Document* document)

{

    return adoptRef(new HTMLIFrameElement(tagName, document));

}

bool HTMLIFrameElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const

{

    if (attrName == widthAttr || attrName == heightAttr) {

        result = eUniversal;

        return false;

    }

    if (attrName == alignAttr) {

        result = eReplaced; // Share with <img> since the alignment behavior is the same.

        return false;

    }

    if (attrName == frameborderAttr) {

        result = eReplaced;

        return false;

    }

    return HTMLFrameElementBase::mapToEntry(attrName, result);

}

#if ENABLE(SANDBOX)

static SandboxFlags parseSandboxAttribute(Attribute* attribute)

{

    if (attribute->isNull())

        return SandboxNone;

    // Parse the unordered set of unique space-separated tokens.

    SandboxFlags flags = SandboxAll;

    const UChar* characters = attribute->value().characters();

    unsigned length = attribute->value().length();

    unsigned start = 0;

    while (true) {

        while (start < length && isASCIISpace(characters[start]))

            ++start;

        if (start >= length)

            break;

        unsigned end = start + 1;

        while (end < length && !isASCIISpace(characters[end]))

            ++end;

        // Turn off the corresponding sandbox flag if it's set as "allowed".

        String sandboxToken = String(characters + start, end - start);

        if (equalIgnoringCase(sandboxToken, "allow-same-origin"))

            flags &= ~SandboxOrigin;

        else if (equalIgnoringCase(sandboxToken, "allow-forms"))

            flags &= ~SandboxForms;

        else if (equalIgnoringCase(sandboxToken, "allow-scripts"))

            flags &= ~SandboxScripts;

        else if (equalIgnoringCase(sandboxToken, "allow-top-navigation"))

            flags &= ~SandboxTopNavigation;

        start = end + 1;

    }

    return flags;

}

#endif

void HTMLIFrameElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == widthAttr)

        addCSSLength(attr, CSSPropertyWidth, attr->value());

    else if (attr->name() == heightAttr)

        addCSSLength(attr, CSSPropertyHeight, attr->value());

    else if (attr->name() == alignAttr)

        addHTMLAlignment(attr);

    else if (attr->name() == nameAttr) {

        const AtomicString& newName = attr->value();

        if (inDocument() && document()->isHTMLDocument()) {

            HTMLDocument* document = static_cast<HTMLDocument*>(this->document());

            document->removeExtraNamedItem(m_name);

            document->addExtraNamedItem(newName);

        }

        m_name = newName;

    } else if (attr->name() == frameborderAttr) {

        // Frame border doesn't really match the HTML4 spec definition for iframes.  It simply adds

        // a presentational hint that the border should be off if set to zero.

        if (!attr->isNull() && !attr->value().toInt())

            // Add a rule that nulls out our border width.

            addCSSLength(attr, CSSPropertyBorderWidth, "0");

    }

#if ENABLE(SANDBOX)

    else if (attr->name() == sandboxAttr)

        setSandboxFlags(parseSandboxAttribute(attr));

#endif

    else

        HTMLFrameElementBase::parseMappedAttribute(attr);

}

bool HTMLIFrameElement::rendererIsNeeded(RenderStyle* style)

{

    return isURLAllowed() && style->display() != NONE;

}

RenderObject* HTMLIFrameElement::createRenderer(RenderArena* arena, RenderStyle*)

{

    return new (arena) RenderIFrame(this);

}

void HTMLIFrameElement::insertedIntoDocument()

{

    if (document()->isHTMLDocument())

        static_cast<HTMLDocument*>(document())->addExtraNamedItem(m_name);

    HTMLFrameElementBase::insertedIntoDocument();

}

void HTMLIFrameElement::removedFromDocument()

{

    if (document()->isHTMLDocument())

        static_cast<HTMLDocument*>(document())->removeExtraNamedItem(m_name);

    HTMLFrameElementBase::removedFromDocument();

}

bool HTMLIFrameElement::isURLAttribute(Attribute* attr) const

{

    return attr->name() == srcAttr;

}

}