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/*
* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
*
* 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 "AffineTransform.h"
#include "RenderSVGPath.h"
#include "RenderSVGResource.h"
#include "SVGNames.h"
#include "SVGPathData.h"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
// Animated property definitions
DEFINE_ANIMATED_TRANSFORM_LIST(SVGGraphicsElement, SVGNames::transformAttr, Transform, transform)
BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGGraphicsElement)
REGISTER_LOCAL_ANIMATED_PROPERTY(transform)
REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement)
REGISTER_PARENT_ANIMATED_PROPERTIES(SVGTests)
END_REGISTER_ANIMATED_PROPERTIES
SVGGraphicsElement::SVGGraphicsElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
, m_shouldIsolateBlending(false)
{
registerAnimatedPropertiesForSVGGraphicsElement();
}
SVGGraphicsElement::~SVGGraphicsElement()
{
}
AffineTransform SVGGraphicsElement::getCTM(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGLocatable::computeCTM(this, SVGLocatable::NearestViewportScope, styleUpdateStrategy);
}
AffineTransform SVGGraphicsElement::getScreenCTM(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGLocatable::computeCTM(this, SVGLocatable::ScreenScope, styleUpdateStrategy);
}
AffineTransform SVGGraphicsElement::animatedLocalTransform() const
{
AffineTransform matrix;
RenderStyle* style = renderer() ? &renderer()->style() : nullptr;
// If CSS property was set, use that, otherwise fallback to attribute (if set).
if (style && style->hasTransform()) {
// 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, renderer()->objectBoundingBox());
// 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
transform().concatenate(matrix);
if (m_supplementalTransform)
return *m_supplementalTransform * matrix;
return matrix;
}
AffineTransform* SVGGraphicsElement::supplementalTransform()
{
if (!m_supplementalTransform)
m_supplementalTransform = std::make_unique<AffineTransform>();
return m_supplementalTransform.get();
}
bool SVGGraphicsElement::isSupportedAttribute(const QualifiedName& attrName)
{
static NeverDestroyed<HashSet<QualifiedName>> supportedAttributes;
if (supportedAttributes.get().isEmpty()) {
SVGTests::addSupportedAttributes(supportedAttributes);
supportedAttributes.get().add(SVGNames::transformAttr);
}
return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName);
}
void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == SVGNames::transformAttr) {
SVGTransformList newList;
newList.parse(value);
detachAnimatedTransformListWrappers(newList.size());
setTransformBaseValue(newList);
return;
}
SVGElement::parseAttribute(name, value);
SVGTests::parseAttribute(name, value);
}
void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (!isSupportedAttribute(attrName)) {
SVGElement::svgAttributeChanged(attrName);
return;
}
InstanceInvalidationGuard guard(*this);
if (SVGTests::handleAttributeChange(this, attrName))
return;
auto renderer = this->renderer();
if (!renderer)
return;
if (attrName == SVGNames::transformAttr) {
renderer->setNeedsTransformUpdate();
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
return;
}
ASSERT_NOT_REACHED();
}
SVGElement* SVGGraphicsElement::nearestViewportElement() const
{
return SVGTransformable::nearestViewportElement(this);
}
SVGElement* SVGGraphicsElement::farthestViewportElement() const
{
return SVGTransformable::farthestViewportElement(this);
}
FloatRect SVGGraphicsElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
{
return SVGTransformable::getBBox(this, styleUpdateStrategy);
}
RenderPtr<RenderElement> SVGGraphicsElement::createElementRenderer(Ref<RenderStyle>&& style, const RenderTreePosition&)
{
// By default, any subclass is expected to do path-based drawing
return createRenderer<RenderSVGPath>(*this, WTFMove(style));
}
void SVGGraphicsElement::toClipPath(Path& path)
{
updatePathFromGraphicsElement(this, path);
// FIXME: How do we know the element has done a layout?
path.transform(animatedLocalTransform());
}
}
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