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/*
* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
* Copyright (C) 2018 Apple Inc. 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"
#include "SVGGraphicsElement.h"
#include "RenderSVGPath.h"
#include "RenderSVGResource.h"
#include "SVGMatrix.h"
#include "SVGNames.h"
#include "SVGPathData.h"
#include "SVGRect.h"
#include "SVGSVGElement.h"
#include "SVGStringList.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGGraphicsElement);
SVGGraphicsElement::SVGGraphicsElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
, SVGTests(this)
, m_shouldIsolateBlending(false)
{
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::transformAttr, &SVGGraphicsElement::m_transform>();
});
}
SVGGraphicsElement::~SVGGraphicsElement() = default;
Ref<SVGMatrix> SVGGraphicsElement::getCTMForBindings()
{
return SVGMatrix::create(getCTM());
}
AffineTransform SVGGraphicsElement::getCTM(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGLocatable::computeCTM(this, SVGLocatable::NearestViewportScope, styleUpdateStrategy);
}
Ref<SVGMatrix> SVGGraphicsElement::getScreenCTMForBindings()
{
return SVGMatrix::create(getScreenCTM());
}
AffineTransform SVGGraphicsElement::getScreenCTM(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGLocatable::computeCTM(this, SVGLocatable::ScreenScope, styleUpdateStrategy);
}
AffineTransform SVGGraphicsElement::animatedLocalTransform() const
{
AffineTransform matrix;
auto* style = renderer() ? &renderer()->style() : nullptr;
// If CSS property was set, use that, otherwise fallback to attribute (if set).
if (style && style->hasTransform()) {
FloatRect boundingBox;
switch (style->transformBox()) {
case TransformBox::FillBox:
boundingBox = renderer()->objectBoundingBox();
break;
case TransformBox::BorderBox:
// For SVG elements without an associated CSS layout box, the used value for border-box is view-box.
case TransformBox::ViewBox: {
FloatSize viewportSize;
SVGLengthContext(this).determineViewport(viewportSize);
boundingBox.setSize(viewportSize);
break;
}
}
// Note: objectBoundingBox is an emptyRect for elements like pattern or clipPath.
// See the "Object bounding box units" section of http://dev.w3.org/csswg/css3-transforms/
TransformationMatrix transform;
style->applyTransform(transform, boundingBox);
// Flatten any 3D transform.
matrix = transform.toAffineTransform();
// CSS bakes the zoom factor into lengths, including translation components.
// In order to align CSS & SVG transforms, we need to invert this operation.
float zoom = style->effectiveZoom();
if (zoom != 1) {
matrix.setE(matrix.e() / zoom);
matrix.setF(matrix.f() / zoom);
}
} else
matrix = transform().concatenate();
if (m_supplementalTransform)
return *m_supplementalTransform * matrix;
return matrix;
}
AffineTransform* SVGGraphicsElement::supplementalTransform()
{
if (!m_supplementalTransform)
m_supplementalTransform = makeUnique<AffineTransform>();
return m_supplementalTransform.get();
}
void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == SVGNames::transformAttr) {
m_transform->baseVal()->parse(value);
return;
}
SVGElement::parseAttribute(name, value);
SVGTests::parseAttribute(name, value);
}
void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (attrName == SVGNames::transformAttr) {
InstanceInvalidationGuard guard(*this);
if (auto renderer = this->renderer()) {
renderer->setNeedsTransformUpdate();
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
}
return;
}
SVGElement::svgAttributeChanged(attrName);
SVGTests::svgAttributeChanged(attrName);
}
SVGElement* SVGGraphicsElement::nearestViewportElement() const
{
return SVGTransformable::nearestViewportElement(this);
}
SVGElement* SVGGraphicsElement::farthestViewportElement() const
{
return SVGTransformable::farthestViewportElement(this);
}
Ref<SVGRect> SVGGraphicsElement::getBBoxForBindings()
{
return SVGRect::create(getBBox());
}
FloatRect SVGGraphicsElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGTransformable::getBBox(this, styleUpdateStrategy);
}
RenderPtr<RenderElement> SVGGraphicsElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return createRenderer<RenderSVGPath>(*this, WTFMove(style));
}
Path SVGGraphicsElement::toClipPath()
{
Path path = pathFromGraphicsElement(this);
// FIXME: How do we know the element has done a layout?
path.transform(animatedLocalTransform());
return path;
}
}