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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 "LegacyRenderSVGPath.h"
#include "RenderAncestorIterator.h"
#include "RenderElementInlines.h"
#include "RenderLayer.h"
#include "RenderSVGHiddenContainer.h"
#include "RenderSVGPath.h"
#include "RenderSVGResource.h"
#include "SVGMatrix.h"
#include "SVGNames.h"
#include "SVGPathData.h"
#include "SVGRect.h"
#include "SVGRenderSupport.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, UniqueRef<SVGPropertyRegistry>&& propertyRegistry)
: SVGElement(tagName, document, WTFMove(propertyRegistry))
, 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
{
#if ENABLE(LAYER_BASED_SVG_ENGINE)
// LBSE handles transforms via RenderLayer, no need to handle CSS transforms here.
if (document().settings().layerBasedSVGEngineEnabled()) {
if (m_supplementalTransform)
return *m_supplementalTransform * transform().concatenate();
return transform().concatenate();
}
#endif
AffineTransform matrix;
auto* style = renderer() ? &renderer()->style() : nullptr;
bool hasSpecifiedTransform = style && style->hasTransform();
// Honor any of the transform-related CSS properties if set.
if (hasSpecifiedTransform || (style && (style->translate() || style->scale() || style->rotate()))) {
// 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()->transformReferenceBoxRect());
// 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);
}
}
// If we didn't have the CSS "transform" property set, we must account for the "transform" attribute.
if (!hasSpecifiedTransform && style) {
auto t = style->computeTransformOrigin(renderer()->transformReferenceBoxRect()).xy();
matrix.translate(t);
matrix *= transform().concatenate();
matrix.translate(-t.x(), -t.y());
}
if (m_supplementalTransform)
return *m_supplementalTransform * matrix;
return matrix;
}
AffineTransform* SVGGraphicsElement::ensureSupplementalTransform()
{
if (!m_supplementalTransform)
m_supplementalTransform = makeUnique<AffineTransform>();
return m_supplementalTransform.get();
}
void SVGGraphicsElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
if (name == SVGNames::transformAttr)
m_transform->baseVal()->parse(newValue);
SVGTests::parseAttribute(name, newValue);
SVGElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (PropertyRegistry::isKnownAttribute(attrName)) {
ASSERT(attrName == SVGNames::transformAttr);
InstanceInvalidationGuard guard(*this);
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (document().settings().layerBasedSVGEngineEnabled()) {
if (auto* layerRenderer = dynamicDowncast<RenderLayerModelObject>(renderer()))
layerRenderer->repaintOrRelayoutAfterSVGTransformChange();
return;
}
#endif
if (auto* renderer = this->renderer())
renderer->setNeedsTransformUpdate();
updateSVGRendererForElementChange();
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&)
{
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (document().settings().layerBasedSVGEngineEnabled())
return createRenderer<RenderSVGPath>(*this, WTFMove(style));
#endif
return createRenderer<LegacyRenderSVGPath>(*this, WTFMove(style));
}
void SVGGraphicsElement::didAttachRenderers()
{
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (document().settings().layerBasedSVGEngineEnabled()) {
if (auto* svgRenderer = dynamicDowncast<RenderLayerModelObject>(renderer()); svgRenderer && lineageOfType<RenderSVGHiddenContainer>(*svgRenderer).first()) {
if (auto* layer = svgRenderer->layer())
layer->dirtyVisibleContentStatus();
}
}
#endif
}
Path SVGGraphicsElement::toClipPath()
{
// FIXME: [LBSE] Stop mutating the path here and stop calling animatedLocalTransform().
Path path = pathFromGraphicsElement(this);
// FIXME: How do we know the element has done a layout?
path.transform(animatedLocalTransform());
return path;
}
}
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