/*

    Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>

                  2005 Alexander Kellett <lypanov@kde.org>

                  2009 Dirk Schulze <krit@webkit.org>

    Copyright (C) Research In Motion Limited 2009-2010. 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"

#if ENABLE(SVG)

#include "SVGMaskElement.h"

#include "Attribute.h"

#include "CSSStyleSelector.h"

#include "RenderSVGResourceMasker.h"

#include "SVGLength.h"

#include "SVGNames.h"

#include "SVGRenderSupport.h"

#include "SVGUnitTypes.h"

using namespace std;

namespace WebCore {

SVGMaskElement::SVGMaskElement(const QualifiedName& tagName, Document* doc)

    : SVGStyledLocatableElement(tagName, doc)

    , SVGURIReference()

    , SVGTests()

    , SVGLangSpace()

    , SVGExternalResourcesRequired()

    , m_maskUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)

    , m_maskContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)

    , m_x(LengthModeWidth, "-10%")

    , m_y(LengthModeHeight, "-10%")

    , m_width(LengthModeWidth, "120%")

    , m_height(LengthModeHeight, "120%")

{

    // Spec: If the x/y attribute is not specified, the effect is as if a value of "-10%" were specified.

    // Spec: If the width/height attribute is not specified, the effect is as if a value of "120%" were specified.

}

SVGMaskElement::~SVGMaskElement()

{

}

void SVGMaskElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == SVGNames::maskUnitsAttr) {

        if (attr->value() == "userSpaceOnUse")

            setMaskUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);

        else if (attr->value() == "objectBoundingBox")

            setMaskUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

    } else if (attr->name() == SVGNames::maskContentUnitsAttr) {

        if (attr->value() == "userSpaceOnUse")

            setMaskContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);

        else if (attr->value() == "objectBoundingBox")

            setMaskContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

    } else if (attr->name() == SVGNames::xAttr)

        setXBaseValue(SVGLength(LengthModeWidth, attr->value()));

    else if (attr->name() == SVGNames::yAttr)

        setYBaseValue(SVGLength(LengthModeHeight, attr->value()));

    else if (attr->name() == SVGNames::widthAttr)

        setWidthBaseValue(SVGLength(LengthModeWidth, attr->value()));

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

        setHeightBaseValue(SVGLength(LengthModeHeight, attr->value()));

    else {

        if (SVGURIReference::parseMappedAttribute(attr))

            return;

        if (SVGTests::parseMappedAttribute(attr))

            return;

        if (SVGLangSpace::parseMappedAttribute(attr))

            return;

        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))

            return;

        SVGStyledElement::parseMappedAttribute(attr);

    }

}

void SVGMaskElement::svgAttributeChanged(const QualifiedName& attrName)

{

    SVGStyledElement::svgAttributeChanged(attrName);

    bool invalidateClients = false;

    if (attrName == SVGNames::xAttr

        || attrName == SVGNames::yAttr

        || attrName == SVGNames::widthAttr

        || attrName == SVGNames::heightAttr) {

        invalidateClients = true;

        updateRelativeLengthsInformation();

    }

    if (invalidateClients

        || attrName == SVGNames::maskUnitsAttr

        || attrName == SVGNames::maskContentUnitsAttr

        || SVGURIReference::isKnownAttribute(attrName)

        || SVGTests::isKnownAttribute(attrName)

        || SVGLangSpace::isKnownAttribute(attrName)

        || SVGExternalResourcesRequired::isKnownAttribute(attrName)

        || SVGStyledElement::isKnownAttribute(attrName))

        invalidateResourceClients();

}

void SVGMaskElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGStyledElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizeMaskUnits();

        synchronizeMaskContentUnits();

        synchronizeX();

        synchronizeY();

        synchronizeExternalResourcesRequired();

        synchronizeHref();

        return;

    }

    if (attrName == SVGNames::maskUnitsAttr)

        synchronizeMaskUnits();

    else if (attrName == SVGNames::maskContentUnitsAttr)

        synchronizeMaskContentUnits();

    else if (attrName == SVGNames::xAttr)

        synchronizeX();

    else if (attrName == SVGNames::yAttr)

        synchronizeY();

    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))

        synchronizeExternalResourcesRequired();

    else if (SVGURIReference::isKnownAttribute(attrName))

        synchronizeHref();

}

void SVGMaskElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)

{

    SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);

    if (!changedByParser)

        invalidateResourceClients();

}

FloatRect SVGMaskElement::maskBoundingBox(const FloatRect& objectBoundingBox) const

{

    FloatRect maskBBox;

    if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)

        maskBBox = FloatRect(x().valueAsPercentage() * objectBoundingBox.width() + objectBoundingBox.x(),

                             y().valueAsPercentage() * objectBoundingBox.height() + objectBoundingBox.y(),

                             width().valueAsPercentage() * objectBoundingBox.width(),

                             height().valueAsPercentage() * objectBoundingBox.height());

    else

        maskBBox = FloatRect(x().value(this),

                             y().value(this),

                             width().value(this),

                             height().value(this));

    return maskBBox;

}

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

{

    return new (arena) RenderSVGResourceMasker(this);

}

bool SVGMaskElement::selfHasRelativeLengths() const

{

    return x().isRelative()

        || y().isRelative()

        || width().isRelative()

        || height().isRelative();

}

}

#endif // ENABLE(SVG)