/*

    Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>

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

    Copyright (C) Research In Motion Limited 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 "SVGPatternElement.h"

#include "AffineTransform.h"

#include "Attribute.h"

#include "Document.h"

#include "FloatConversion.h"

#include "GraphicsContext.h"

#include "ImageBuffer.h"

#include "PatternAttributes.h"

#include "RenderSVGContainer.h"

#include "RenderSVGResourcePattern.h"

#include "SVGLength.h"

#include "SVGNames.h"

#include "SVGRenderSupport.h"

#include "SVGSVGElement.h"

#include "SVGStyledTransformableElement.h"

#include "SVGTransformList.h"

#include "SVGTransformable.h"

#include "SVGUnitTypes.h"

#include <math.h>

#include <wtf/MathExtras.h>

#include <wtf/OwnPtr.h>

using namespace std;

namespace WebCore {

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

    : SVGStyledElement(tagName, doc)

    , SVGURIReference()

    , SVGTests()

    , SVGLangSpace()

    , SVGExternalResourcesRequired()

    , SVGFitToViewBox()

    , m_x(LengthModeWidth)

    , m_y(LengthModeHeight)

    , m_width(LengthModeWidth)

    , m_height(LengthModeHeight)

    , m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)

    , m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)

    , m_patternTransform(SVGTransformList::create(SVGNames::patternTransformAttr))

{

}

SVGPatternElement::~SVGPatternElement()

{

}

void SVGPatternElement::parseMappedAttribute(Attribute* attr)

{

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

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

            setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);

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

            setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

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

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

            setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);

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

            setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

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

        SVGTransformList* patternTransforms = patternTransformBaseValue();

        if (!SVGTransformable::parseTransformAttribute(patternTransforms, attr->value())) {

            ExceptionCode ec = 0;

            patternTransforms->clear(ec);

        }

    } 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()));

        if (widthBaseValue().value(this) < 0.0)

            document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed");

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

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

        if (heightBaseValue().value(this) < 0.0)

            document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <height> is not allowed");

    } else {

        if (SVGURIReference::parseMappedAttribute(attr))

            return;

        if (SVGTests::parseMappedAttribute(attr))

            return;

        if (SVGLangSpace::parseMappedAttribute(attr))

            return;

        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))

            return;

        if (SVGFitToViewBox::parseMappedAttribute(document(), attr))

            return;

        SVGStyledElement::parseMappedAttribute(attr);

    }

}

void SVGPatternElement::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::patternUnitsAttr

        || attrName == SVGNames::patternContentUnitsAttr

        || attrName == SVGNames::patternTransformAttr

        || SVGURIReference::isKnownAttribute(attrName)

        || SVGTests::isKnownAttribute(attrName)

        || SVGLangSpace::isKnownAttribute(attrName)

        || SVGExternalResourcesRequired::isKnownAttribute(attrName)

        || SVGFitToViewBox::isKnownAttribute(attrName)

        || SVGStyledElement::isKnownAttribute(attrName))

        invalidateResourceClients();

}

void SVGPatternElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGStyledElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizePatternUnits();

        synchronizePatternContentUnits();

        synchronizePatternTransform();

        synchronizeX();

        synchronizeY();

        synchronizeWidth();

        synchronizeHeight();

        synchronizeExternalResourcesRequired();

        synchronizeViewBox();

        synchronizePreserveAspectRatio();

        synchronizeHref();

        return;

    }

    if (attrName == SVGNames::patternUnitsAttr)

        synchronizePatternUnits();

    else if (attrName == SVGNames::patternContentUnitsAttr)

        synchronizePatternContentUnits();

    else if (attrName == SVGNames::patternTransformAttr)

        synchronizePatternTransform();

    else if (attrName == SVGNames::xAttr)

        synchronizeX();

    else if (attrName == SVGNames::yAttr)

        synchronizeY();

    else if (attrName == SVGNames::widthAttr)

        synchronizeWidth();

    else if (attrName == SVGNames::heightAttr)

        synchronizeHeight();

    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))

        synchronizeExternalResourcesRequired();

    else if (SVGFitToViewBox::isKnownAttribute(attrName)) {

        synchronizeViewBox();

        synchronizePreserveAspectRatio();

    } else if (SVGURIReference::isKnownAttribute(attrName))

        synchronizeHref();

}

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

{

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

    if (!changedByParser)

        invalidateResourceClients();

}

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

{

    return new (arena) RenderSVGResourcePattern(this);

}

PatternAttributes SVGPatternElement::collectPatternProperties() const

{

    PatternAttributes attributes;

    HashSet<const SVGPatternElement*> processedPatterns;

    const SVGPatternElement* current = this;

    while (current) {

        if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))

            attributes.setX(current->x());

        if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))

            attributes.setY(current->y());

        if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))

            attributes.setWidth(current->width());

        if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))

            attributes.setHeight(current->height());

        if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr))

            attributes.setBoundingBoxMode(current->patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

        if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr))

            attributes.setBoundingBoxModeContent(current->patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);

        if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr))

            attributes.setPatternTransform(current->patternTransform()->consolidate().matrix());

        if (!attributes.hasPatternContentElement() && current->hasChildNodes())

            attributes.setPatternContentElement(current);

        processedPatterns.add(current);

        // Respect xlink:href, take attributes from referenced element

        Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));

        if (refNode && refNode->hasTagName(SVGNames::patternTag)) {

            current = static_cast<const SVGPatternElement*>(const_cast<const Node*>(refNode));

            // Cycle detection

            if (processedPatterns.contains(current))

                return PatternAttributes();

        } else

            current = 0;

    }

    return attributes;

}

bool SVGPatternElement::selfHasRelativeLengths() const

{

    return x().isRelative()

        || y().isRelative()

        || width().isRelative()

        || height().isRelative();

}

}

#endif // ENABLE(SVG)