/**
 * This file is part of the DOM implementation for KDE.
 *
 * 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 Apple Computer, Inc.
 * Copyright (C) 2007 Trolltech ASA
 *
 * 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 "CSSHelper.h"
#include "CSSPropertyNames.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLDocument.h"
#include "HTMLObjectElement.h"
#include "HTMLNames.h"
#include "RenderPartObject.h"

#if ENABLE(SVG)
#include "ExceptionCode.h"
#include "SVGDocument.h"
#endif

namespace WebCore {

using namespace HTMLNames;

HTMLEmbedElement::HTMLEmbedElement(Document* doc)
    : HTMLPlugInElement(embedTag, doc)
    , m_needWidgetUpdate(false)
{
}

HTMLEmbedElement::~HTMLEmbedElement()
{
#if USE(JAVASCRIPTCORE_BINDINGS)
    // m_instance should have been cleaned up in detach().
    ASSERT(!m_instance);
#endif
}

#if USE(JAVASCRIPTCORE_BINDINGS)
static inline RenderWidget* findWidgetRenderer(const Node* n) 
{
    if (!n->renderer())
        do
            n = n->parentNode();
        while (n && !n->hasTagName(objectTag));
    
    return (n && n->renderer() && n->renderer()->isWidget()) 
        ? static_cast<RenderWidget*>(n->renderer()) : 0;
}
    
KJS::Bindings::Instance *HTMLEmbedElement::getInstance() const
{
    Frame* frame = document()->frame();
    if (!frame)
        return 0;

    if (m_instance)
        return m_instance.get();
    
    RenderWidget* renderWidget = findWidgetRenderer(this);
    if (renderWidget && !renderWidget->widget()) {
        document()->updateLayoutIgnorePendingStylesheets();
        renderWidget = findWidgetRenderer(this);
    }
    
    if (renderWidget && renderWidget->widget()) 
        m_instance = frame->createScriptInstanceForWidget(renderWidget->widget());
    
    return m_instance.get();
}
#endif

bool HTMLEmbedElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
{
    if (attrName == hiddenAttr) {
        result = eUniversal;
        return false;
    }
        
    return HTMLPlugInElement::mapToEntry(attrName, result);
}

void HTMLEmbedElement::parseMappedAttribute(MappedAttribute* attr)
{
    String val = attr->value();
  
    if (attr->name() == typeAttr) {
        m_serviceType = val.lower();
        int pos = m_serviceType.find(";");
        if (pos != -1)
            m_serviceType = m_serviceType.left(pos);
    } else if (attr->name() == codeAttr || attr->name() == srcAttr)
         url = parseURL(val).deprecatedString();
    else if (attr->name() == pluginpageAttr || attr->name() == pluginspageAttr)
        m_pluginPage = val;
    else if (attr->name() == hiddenAttr) {
        if (val.lower() == "yes" || val.lower() == "true") {
            // FIXME: Not dynamic, but it's not really important that such a rarely-used
            // feature work dynamically.
            addCSSLength(attr, CSS_PROP_WIDTH, "0");
            addCSSLength(attr, CSS_PROP_HEIGHT, "0");
        }
    } else if (attr->name() == nameAttr) {
        if (inDocument() && document()->isHTMLDocument()) {
            HTMLDocument* doc = static_cast<HTMLDocument*>(document());
            doc->removeNamedItem(oldNameAttr);
            doc->addNamedItem(val);
        }
        oldNameAttr = val;
    } else
        HTMLPlugInElement::parseMappedAttribute(attr);
}

bool HTMLEmbedElement::rendererIsNeeded(RenderStyle *style)
{
    Frame *frame = document()->frame();
    if (!frame)
        return false;

    Node *p = parentNode();
    if (p && p->hasTagName(objectTag)) {
        ASSERT(p->renderer());
        return false;
    }

    return true;
}

RenderObject *HTMLEmbedElement::createRenderer(RenderArena *arena, RenderStyle *style)
{
    return new (arena) RenderPartObject(this);
}

void HTMLEmbedElement::attach()
{
    m_needWidgetUpdate = true;
    queuePostAttachCallback(&HTMLPlugInElement::updateWidgetCallback, this);
    HTMLPlugInElement::attach();
}

void HTMLEmbedElement::detach()
{
#if USE(JAVASCRIPTCORE_BINDINGS)
    m_instance = 0;
#endif
    HTMLPlugInElement::detach();
}

void HTMLEmbedElement::updateWidget()
{
    if (m_needWidgetUpdate && renderer())
        static_cast<RenderPartObject*>(renderer())->updateWidget(true);
}

void HTMLEmbedElement::insertedIntoDocument()
{
    if (document()->isHTMLDocument()) {
        HTMLDocument *doc = static_cast<HTMLDocument *>(document());
        doc->addNamedItem(oldNameAttr);
    }

    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()) {
        HTMLDocument *doc = static_cast<HTMLDocument *>(document());
        doc->removeNamedItem(oldNameAttr);
    }

    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;
}

String HTMLEmbedElement::src() const
{
    return getAttribute(srcAttr);
}

void HTMLEmbedElement::setSrc(const String& value)
{
    setAttribute(srcAttr, value);
}

String HTMLEmbedElement::type() const
{
    return getAttribute(typeAttr);
}

void HTMLEmbedElement::setType(const String& value)
{
    setAttribute(typeAttr, value);
}

#if ENABLE(SVG)
SVGDocument* HTMLEmbedElement::getSVGDocument(ExceptionCode& ec) const
{
    Document* doc = contentDocument();
    if (doc && doc->isSVGDocument())
        return static_cast<SVGDocument*>(doc);
    // Spec: http://www.w3.org/TR/SVG/struct.html#InterfaceGetSVGDocument
    ec = NOT_SUPPORTED_ERR;
    return 0;
}
#endif

}