/*
 * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
 * Copyright (C) 2005 Alexander Kellett <lypanov@kde.org>
 * Copyright (C) 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 "core/svg/SVGMaskElement.h"

#include "core/dom/StyleChangeReason.h"
#include "core/layout/svg/LayoutSVGResourceMasker.h"

namespace blink {

inline SVGMaskElement::SVGMaskElement(Document& document)
    : SVGElement(SVGNames::maskTag, document),
      SVGTests(this),
      m_x(SVGAnimatedLength::create(this,
                                    SVGNames::xAttr,
                                    SVGLength::create(SVGLengthMode::Width))),
      m_y(SVGAnimatedLength::create(this,
                                    SVGNames::yAttr,
                                    SVGLength::create(SVGLengthMode::Height))),
      m_width(
          SVGAnimatedLength::create(this,
                                    SVGNames::widthAttr,
                                    SVGLength::create(SVGLengthMode::Width))),
      m_height(
          SVGAnimatedLength::create(this,
                                    SVGNames::heightAttr,
                                    SVGLength::create(SVGLengthMode::Height))),
      m_maskUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(
          this,
          SVGNames::maskUnitsAttr,
          SVGUnitTypes::kSvgUnitTypeObjectboundingbox)),
      m_maskContentUnits(
          SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(
              this,
              SVGNames::maskContentUnitsAttr,
              SVGUnitTypes::kSvgUnitTypeUserspaceonuse)) {
  // Spec: If the x/y attribute is not specified, the effect is as if a value of
  // "-10%" were specified.
  m_x->setDefaultValueAsString("-10%");
  m_y->setDefaultValueAsString("-10%");

  // Spec: If the width/height attribute is not specified, the effect is as if a
  // value of "120%" were specified.
  m_width->setDefaultValueAsString("120%");
  m_height->setDefaultValueAsString("120%");

  addToPropertyMap(m_x);
  addToPropertyMap(m_y);
  addToPropertyMap(m_width);
  addToPropertyMap(m_height);
  addToPropertyMap(m_maskUnits);
  addToPropertyMap(m_maskContentUnits);
}

DEFINE_TRACE(SVGMaskElement) {
  visitor->trace(m_x);
  visitor->trace(m_y);
  visitor->trace(m_width);
  visitor->trace(m_height);
  visitor->trace(m_maskUnits);
  visitor->trace(m_maskContentUnits);
  SVGElement::trace(visitor);
  SVGTests::trace(visitor);
}

DEFINE_NODE_FACTORY(SVGMaskElement)

bool SVGMaskElement::isPresentationAttribute(
    const QualifiedName& attrName) const {
  if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr ||
      attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr)
    return true;
  return SVGElement::isPresentationAttribute(attrName);
}

bool SVGMaskElement::isPresentationAttributeWithSVGDOM(
    const QualifiedName& attrName) const {
  if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr ||
      attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr)
    return true;
  return SVGElement::isPresentationAttributeWithSVGDOM(attrName);
}

void SVGMaskElement::collectStyleForPresentationAttribute(
    const QualifiedName& name,
    const AtomicString& value,
    MutableStylePropertySet* style) {
  SVGAnimatedPropertyBase* property = propertyFromAttribute(name);
  if (property == m_x)
    addPropertyToPresentationAttributeStyle(
        style, CSSPropertyX, m_x->currentValue()->asCSSPrimitiveValue());
  else if (property == m_y)
    addPropertyToPresentationAttributeStyle(
        style, CSSPropertyY, m_y->currentValue()->asCSSPrimitiveValue());
  else if (property == m_width)
    addPropertyToPresentationAttributeStyle(
        style, CSSPropertyWidth,
        m_width->currentValue()->asCSSPrimitiveValue());
  else if (property == m_height)
    addPropertyToPresentationAttributeStyle(
        style, CSSPropertyHeight,
        m_height->currentValue()->asCSSPrimitiveValue());
  else
    SVGElement::collectStyleForPresentationAttribute(name, value, style);
}

void SVGMaskElement::svgAttributeChanged(const QualifiedName& attrName) {
  bool isLengthAttr =
      attrName == SVGNames::xAttr || attrName == SVGNames::yAttr ||
      attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr;

  if (isLengthAttr || attrName == SVGNames::maskUnitsAttr ||
      attrName == SVGNames::maskContentUnitsAttr ||
      SVGTests::isKnownAttribute(attrName)) {
    SVGElement::InvalidationGuard invalidationGuard(this);

    if (isLengthAttr) {
      invalidateSVGPresentationAttributeStyle();
      setNeedsStyleRecalc(LocalStyleChange,
                          StyleChangeReasonForTracing::fromAttribute(attrName));
      updateRelativeLengthsInformation();
    }

    LayoutSVGResourceContainer* layoutObject =
        toLayoutSVGResourceContainer(this->layoutObject());
    if (layoutObject)
      layoutObject->invalidateCacheAndMarkForLayout();

    return;
  }

  SVGElement::svgAttributeChanged(attrName);
}

void SVGMaskElement::childrenChanged(const ChildrenChange& change) {
  SVGElement::childrenChanged(change);

  if (change.byParser)
    return;

  if (LayoutObject* object = layoutObject())
    object->setNeedsLayoutAndFullPaintInvalidation(
        LayoutInvalidationReason::ChildChanged);
}

LayoutObject* SVGMaskElement::createLayoutObject(const ComputedStyle&) {
  return new LayoutSVGResourceMasker(this);
}

bool SVGMaskElement::selfHasRelativeLengths() const {
  return m_x->currentValue()->isRelative() ||
         m_y->currentValue()->isRelative() ||
         m_width->currentValue()->isRelative() ||
         m_height->currentValue()->isRelative();
}

}  // namespace blink