/*

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

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

 *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)

 * Copyright (C) 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.

 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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 "HTMLEmbedElement.h"

#include "Attribute.h"

#include "CSSHelper.h"

#include "CSSPropertyNames.h"

#include "Frame.h"

#include "HTMLDocument.h"

#include "HTMLImageLoader.h"

#include "HTMLNames.h"

#include "HTMLObjectElement.h"

#include "RenderEmbeddedObject.h"

#include "RenderImage.h"

#include "RenderWidget.h"

#include "ScriptController.h"

#include "Settings.h"

namespace WebCore {

using namespace HTMLNames;

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

    : HTMLPlugInImageElement(tagName, document)

    , m_needWidgetUpdate(false)

{

    ASSERT(hasTagName(embedTag));

}

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

{

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

}

static inline RenderWidget* findWidgetRenderer(const Node* n) 

{

    if (!n->renderer())

        do

            n = n->parentNode();

        while (n && !n->hasTagName(objectTag));

    if (n && n->renderer() && n->renderer()->isWidget())

        return toRenderWidget(n->renderer());

    return 0;

}

RenderWidget* HTMLEmbedElement::renderWidgetForJSBindings() const

{

    document()->updateLayoutIgnorePendingStylesheets();

    return findWidgetRenderer(this);

}

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

{

    if (attrName == hiddenAttr) {

        result = eUniversal;

        return false;

    }

    return HTMLPlugInElement::mapToEntry(attrName, result);

}

void HTMLEmbedElement::parseMappedAttribute(Attribute* attr)

{

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

    if (attr->name() == typeAttr) {

        m_serviceType = value.string().lower();

        int pos = m_serviceType.find(";");

        if (pos != -1)

            m_serviceType = m_serviceType.left(pos);

        if (!isImageType() && m_imageLoader)

            m_imageLoader.clear();

    } else if (attr->name() == codeAttr)

        m_url = deprecatedParseURL(value.string());

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

        m_url = deprecatedParseURL(value.string());

        if (renderer() && isImageType()) {

            if (!m_imageLoader)

                m_imageLoader.set(new HTMLImageLoader(this));

            m_imageLoader->updateFromElementIgnoringPreviousError();

        }

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

        if (equalIgnoringCase(value.string(), "yes") || equalIgnoringCase(value.string(), "true")) {

            // FIXME: Not dynamic, since we add this but don't remove it, but it may be OK for now

            // that this rarely-used attribute won't work properly if you remove it.

            addCSSLength(attr, CSSPropertyWidth, "0");

            addCSSLength(attr, CSSPropertyHeight, "0");

        }

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

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

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

            document->removeNamedItem(m_name);

            document->addNamedItem(value);

        }

        m_name = value;

    } else

        HTMLPlugInElement::parseMappedAttribute(attr);

}

bool HTMLEmbedElement::rendererIsNeeded(RenderStyle* style)

{

    if (isImageType())

        return HTMLPlugInElement::rendererIsNeeded(style);

    Frame* frame = document()->frame();

    if (!frame)

        return false;

    Node* p = parentNode();

    if (p && p->hasTagName(objectTag)) {

        ASSERT(p->renderer());

        return false;

    }

#if ENABLE(DASHBOARD_SUPPORT)

    // Workaround for <rdar://problem/6642221>. 

    if (Settings* settings = frame->settings()) {

        if (settings->usesDashboardBackwardCompatibilityMode())

            return true;

    }

#endif

    return HTMLPlugInElement::rendererIsNeeded(style);

}

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

{

    if (isImageType())

        return new (arena) RenderImage(this);

    return new (arena) RenderEmbeddedObject(this);

}

void HTMLEmbedElement::attach()

{

    m_needWidgetUpdate = true;

    bool isImage = isImageType();

    if (!isImage)

        queuePostAttachCallback(&HTMLPlugInElement::updateWidgetCallback, this);

    HTMLPlugInElement::attach();

    if (isImage && renderer()) {

        if (!m_imageLoader)

            m_imageLoader.set(new HTMLImageLoader(this));

        m_imageLoader->updateFromElement();

        if (renderer())

            toRenderImage(renderer())->setCachedImage(m_imageLoader->image());

    }

}

void HTMLEmbedElement::updateWidget()

{

    document()->updateStyleIfNeeded();

    if (m_needWidgetUpdate && renderer() && !isImageType())

        toRenderEmbeddedObject(renderer())->updateWidget(true);

}

void HTMLEmbedElement::insertedIntoDocument()

{

    if (document()->isHTMLDocument())

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

    String width = getAttribute(widthAttr);

    String height = getAttribute(heightAttr);

    if (!width.isEmpty() || !height.isEmpty()) {

        Node* n = parent();

        while (n && !n->hasTagName(objectTag))

            n = n->parent();

        if (n) {

            if (!width.isEmpty())

                static_cast<HTMLObjectElement*>(n)->setAttribute(widthAttr, width);

            if (!height.isEmpty())

                static_cast<HTMLObjectElement*>(n)->setAttribute(heightAttr, height);

        }

    }

    HTMLPlugInElement::insertedIntoDocument();

}

void HTMLEmbedElement::removedFromDocument()

{

    if (document()->isHTMLDocument())

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

    HTMLPlugInElement::removedFromDocument();

}

void HTMLEmbedElement::attributeChanged(Attribute* attr, bool preserveDecls)

{

    HTMLPlugInElement::attributeChanged(attr, preserveDecls);

    if ((attr->name() == widthAttr || attr->name() == heightAttr) && !attr->isEmpty()) {

        Node* n = parent();

        while (n && !n->hasTagName(objectTag))

            n = n->parent();

        if (n)

            static_cast<HTMLObjectElement*>(n)->setAttribute(attr->name(), attr->value());

    }

}

bool HTMLEmbedElement::isURLAttribute(Attribute* attr) const

{

    return attr->name() == srcAttr;

}

const QualifiedName& HTMLEmbedElement::imageSourceAttributeName() const

{

    return srcAttr;

}

void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const

{

    HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);

    addSubresourceURL(urls, document()->completeURL(getAttribute(srcAttr)));

}

}