/*
    Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
                  2004, 2005, 2007 Rob Buis <buis@kde.org>
                  2007 Eric Seidel <eric@webkit.org>

    This file is part of the KDE project

    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 "wtf/Platform.h"

#if ENABLE(SVG)
#include "SVGAElement.h"

/*#include "Attr.h"
#include "CSSHelper.h"*/
#include "Document.h"
/*#include "EventHandler.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "KeyboardEvent.h"
#include "MouseEvent.h"
#include "PlatformMouseEvent.h"*/
#include "RenderSVGTransformableContainer.h"
#include "RenderSVGInline.h"
/*#include "ResourceRequest.h"
#include "SVGSMILElement.h"*/
#include "SVGNames.h"
#include "XLinkNames.h"

namespace WebCore
{

//using namespace EventNames;

SVGAElement::SVGAElement(const QualifiedName &tagName, Document *doc)
    : SVGStyledTransformableElement(tagName, doc)
    , SVGURIReference()
    , SVGTests()
    , SVGLangSpace()
    , SVGExternalResourcesRequired()
{
}

SVGAElement::~SVGAElement()
{
}

String SVGAElement::title() const
{
    return getAttribute(XLinkNames::titleAttr);
}

ANIMATED_PROPERTY_DEFINITIONS(SVGAElement, String, String, string, Target, target, SVGNames::targetAttr, m_target)

void SVGAElement::parseMappedAttribute(MappedAttribute *attr)
{
    if (attr->name() == SVGNames::targetAttr) {
        setTargetBaseValue(attr->value());
    } else {
        if (SVGURIReference::parseMappedAttribute(attr)) {
            return;
        }
        if (SVGTests::parseMappedAttribute(attr)) {
            return;
        }
        if (SVGLangSpace::parseMappedAttribute(attr)) {
            return;
        }
        if (SVGExternalResourcesRequired::parseMappedAttribute(attr)) {
            return;
        }
        SVGStyledTransformableElement::parseMappedAttribute(attr);
    }
}

void SVGAElement::svgAttributeChanged(const QualifiedName &attrName)
{
    SVGStyledTransformableElement::svgAttributeChanged(attrName);

    // Unlike other SVG*Element classes, SVGAElement only listens to SVGURIReference changes
    // as none of the other properties changes the linking behaviour for our <a> element.
    if (SVGURIReference::isKnownAttribute(attrName)) {
        /*khtml FIXME bool wasLink = m_isLink;
        m_isLink = !href().isNull();

        if (wasLink != m_isLink)
            setChanged();*/
    }
}

RenderObject *SVGAElement::createRenderer(RenderArena *arena, RenderStyle *style)
{
    Q_UNUSED(style);
    if (static_cast<SVGElement *>(parent())->isTextContent()) {
        return new(arena) RenderSVGInline(this);
    }

    return new(arena) RenderSVGTransformableContainer(this);
}

void SVGAElement::defaultEventHandler(Event *evt)
{
    /*if (m_isLink && (evt->type() == clickEvent || (evt->type() == keydownEvent && m_focused))) {
        MouseEvent* e = 0;
        if (evt->type() == clickEvent && evt->isMouseEvent())
            e = static_cast<MouseEvent*>(evt);

        KeyboardEvent* k = 0;
        if (evt->type() == keydownEvent && evt->isKeyboardEvent())
            k = static_cast<KeyboardEvent*>(evt);

        if (e && e->button() == RightButton) {
            SVGStyledTransformableElement::defaultEventHandler(evt);
            return;
        }

        if (k) {
            if (k->keyIdentifier() != "Enter") {
                SVGStyledTransformableElement::defaultEventHandler(evt);
                return;
            }
            evt->setDefaultHandled();
            dispatchSimulatedClick(evt);
            return;
        }

        String target = this->target();
        if (e && e->button() == MiddleButton)
            target = "_blank";
        else if (target.isEmpty()) // if target is empty, default to "_self" or use xlink:target if set
            target = (getAttribute(XLinkNames::showAttr) == "new") ? "_blank" : "_self";

        if (!evt->defaultPrevented()) {
            String url = parseURL(href());
    #if ENABLE(SVG_ANIMATION)
            if (url.startsWith("#")) {
                Element* targetElement = document()->getElementById(url.substring(1));
                if (SVGSMILElement::isSMILElement(targetElement)) {
                    SVGSMILElement* timed = static_cast<SVGSMILElement*>(targetElement);
                    timed->beginByLinkActivation();
                    evt->setDefaultHandled();
                    SVGStyledTransformableElement::defaultEventHandler(evt);
                    return;
                }
            }
    #endif
            if (document()->frame())
                document()->frame()->loader()->urlSelected(document()->completeURL(url), target, evt, false, true);
        }

        evt->setDefaultHandled();
    }*/

    SVGStyledTransformableElement::defaultEventHandler(evt);
}

bool SVGAElement::supportsFocus() const
{
    /*if (isContentEditable())
        return SVGStyledTransformableElement::supportsFocus();*/
    return isFocusable() || (document() && !document()->haveStylesheetsLoaded());
}

bool SVGAElement::isFocusableImpl(FocusType ft) const
{
    if (ft == FT_Mouse) {
        return false;
    }

    if (isContentEditable()) {
        return SVGStyledTransformableElement::isFocusableImpl(ft);
    }

    // TODO: implement focus rules for SVG
    return false;
}

bool SVGAElement::childShouldCreateRenderer(Node *child) const
{
    // https://www.w3.org/2003/01/REC-SVG11-20030114-errata#linking-text-environment
    // The 'a' element may contain any element that its parent may contain, except itself.
    if (child->hasTagName(SVGNames::aTag)) {
        return false;
    }
    if (parent() && parent()->isSVGElement()) {
        return static_cast<SVGElement *>(parent())->childShouldCreateRenderer(child);
    }

    return SVGElement::childShouldCreateRenderer(child);
}

} // namespace WebCore

#endif // ENABLE(SVG)
