void RenderSVGShape::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
SVGGraphicsElement* element = toSVGGraphicsElement(node());
bool updateCachedBoundariesInParents = false;
if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
updateShapeFromElement();
m_needsShapeUpdate = false;
updateRepaintBoundingBox();
m_needsBoundariesUpdate = false;
updateCachedBoundariesInParents = true;
}
if (m_needsTransformUpdate) {
m_localTransform = element->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(this);
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
RenderSVGModelObject::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
bool RenderSVGTransformableContainer::calculateLocalTransform()
{
SVGGraphicsElement* element = toSVGGraphicsElement(node());
// If we're either the renderer for a <use> element, or for any <g> element inside the shadow
// tree, that was created during the use/symbol/svg expansion in SVGUseElement. These containers
// need to respect the translations induced by their corresponding use elements x/y attributes.
SVGUseElement* useElement = 0;
if (element->hasTagName(SVGNames::useTag))
useElement = toSVGUseElement(element);
else if (element->isInShadowTree() && element->hasTagName(SVGNames::gTag)) {
SVGElement* correspondingElement = element->correspondingElement();
if (correspondingElement && correspondingElement->hasTagName(SVGNames::useTag))
useElement = toSVGUseElement(correspondingElement);
}
if (useElement) {
SVGLengthContext lengthContext(useElement);
FloatSize translation(useElement->x().value(lengthContext), useElement->y().value(lengthContext));
if (translation != m_lastTranslation)
m_needsTransformUpdate = true;
m_lastTranslation = translation;
}
m_didTransformToRootUpdate = m_needsTransformUpdate || SVGRenderSupport::transformToRootChanged(parent());
if (!m_needsTransformUpdate)
return false;
m_localTransform = element->animatedLocalTransform();
m_localTransform.translate(m_lastTranslation.width(), m_lastTranslation.height());
m_needsTransformUpdate = false;
return true;
}
bool SVGSVGElement::checkIntersectionOrEnclosure(
const SVGElement& element,
const FloatRect& rect,
CheckIntersectionOrEnclosure mode) const {
LayoutObject* layoutObject = element.layoutObject();
ASSERT(!layoutObject || layoutObject->style());
if (!layoutObject ||
layoutObject->style()->pointerEvents() == EPointerEvents::None)
return false;
if (!isIntersectionOrEnclosureTarget(layoutObject))
return false;
AffineTransform ctm = toSVGGraphicsElement(element).computeCTM(
AncestorScope, DisallowStyleUpdate, this);
FloatRect mappedRepaintRect =
ctm.mapRect(layoutObject->visualRectInLocalSVGCoordinates());
bool result = false;
switch (mode) {
case CheckIntersection:
result = intersectsAllowingEmpty(rect, mappedRepaintRect);
break;
case CheckEnclosure:
result = rect.contains(mappedRepaintRect);
break;
default:
ASSERT_NOT_REACHED();
break;
}
return result;
}
void RenderSVGShape::layout()
{
bool updateCachedBoundariesInParents = false;
if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
updateShapeFromElement();
m_needsShapeUpdate = false;
updatePaintInvalidationBoundingBox();
m_needsBoundariesUpdate = false;
updateCachedBoundariesInParents = true;
}
if (m_needsTransformUpdate) {
m_localTransform = toSVGGraphicsElement(element())->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(this);
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
RenderSVGModelObject::setNeedsBoundariesUpdate();
clearNeedsLayout();
}
void LayoutSVGShape::createPath()
{
clearPath();
m_path = adoptPtr(new Path);
ASSERT(LayoutSVGShape::isShapeEmpty());
updatePathFromGraphicsElement(toSVGGraphicsElement(element()), path());
}
bool SVGElement::getBoundingBox(FloatRect& rect)
{
if (!isSVGGraphicsElement())
return false;
rect = toSVGGraphicsElement(this)->getBBox();
return true;
}
AffineTransform LayoutSVGShape::nonScalingStrokeTransform() const
{
AffineTransform t = toSVGGraphicsElement(element())->getScreenCTM(SVGGraphicsElement::DisallowStyleUpdate);
// Width of non-scaling stroke is independent of translation, so zero it out here.
t.setE(0);
t.setF(0);
return t;
}
void LayoutSVGShape::updateLocalTransform() {
SVGGraphicsElement* graphicsElement = toSVGGraphicsElement(element());
if (graphicsElement->hasTransform(SVGElement::IncludeMotionTransform)) {
m_localTransform.setTransform(graphicsElement->calculateTransform(
SVGElement::IncludeMotionTransform));
} else {
m_localTransform = AffineTransform();
}
}
// FIXME: This does not belong here.
AffineTransform RenderSVGResourceContainer::transformOnNonScalingStroke(RenderObject* object, const AffineTransform& resourceTransform)
{
if (!object->isSVGShape())
return resourceTransform;
SVGGraphicsElement* element = toSVGGraphicsElement(object->node());
AffineTransform transform = element->getScreenCTM(SVGGraphicsElement::DisallowStyleUpdate);
transform *= resourceTransform;
return transform;
}
bool RenderSVGResourceClipper::pathOnlyClipping(GraphicsContext* context, const AffineTransform& animatedLocalTransform, const FloatRect& objectBoundingBox)
{
// If the current clip-path gets clipped itself, we have to fallback to masking.
if (!style()->svgStyle()->clipperResource().isEmpty())
return false;
WindRule clipRule = RULE_NONZERO;
Path clipPath = Path();
// If clip-path only contains one visible shape or path, we can use path-based clipping. Invisible
// shapes don't affect the clipping and can be ignored. If clip-path contains more than one
// visible shape, the additive clipping may not work, caused by the clipRule. EvenOdd
// as well as NonZero can cause self-clipping of the elements.
// See also http://www.w3.org/TR/SVG/painting.html#FillRuleProperty
for (Node* childNode = clipPathElement().firstChild(); childNode; childNode = childNode->nextSibling()) {
RenderObject* renderer = childNode->renderer();
if (!renderer)
continue;
// Only shapes or paths are supported for direct clipping. We need to fallback to masking for texts.
if (renderer->isSVGText())
return false;
if (!childNode->isSVGElement() || !toSVGElement(childNode)->isSVGGraphicsElement())
continue;
SVGGraphicsElement* styled = toSVGGraphicsElement(childNode);
RenderStyle* style = renderer->style();
if (!style || style->display() == NONE || style->visibility() != VISIBLE)
continue;
const SVGRenderStyle* svgStyle = style->svgStyle();
// Current shape in clip-path gets clipped too. Fallback to masking.
if (!svgStyle->clipperResource().isEmpty())
return false;
// Fallback to masking, if there is more than one clipping path.
if (clipPath.isEmpty()) {
styled->toClipPath(clipPath);
clipRule = svgStyle->clipRule();
} else
return false;
}
// Only one visible shape/path was found. Directly continue clipping and transform the content to userspace if necessary.
if (clipPathElement().clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
AffineTransform transform;
transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
clipPath.transform(transform);
}
// Transform path by animatedLocalTransform.
clipPath.transform(animatedLocalTransform);
// The SVG specification wants us to clip everything, if clip-path doesn't have a child.
if (clipPath.isEmpty())
clipPath.addRect(FloatRect());
context->clipPath(clipPath, clipRule);
return true;
}
void RenderSVGShape::updateShapeFromElement()
{
m_path.clear();
m_path = adoptPtr(new Path);
ASSERT(RenderSVGShape::isShapeEmpty());
updatePathFromGraphicsElement(toSVGGraphicsElement(element()), path());
processMarkerPositions();
m_fillBoundingBox = calculateObjectBoundingBox();
m_strokeBoundingBox = calculateStrokeBoundingBox();
}
void LayoutSVGShape::updateLocalTransform()
{
SVGGraphicsElement* graphicsElement = toSVGGraphicsElement(element());
if (graphicsElement->hasAnimatedLocalTransform()) {
if (m_localTransform)
m_localTransform->setTransform(graphicsElement->calculateAnimatedLocalTransform());
else
m_localTransform = adoptPtr(new AffineTransform(graphicsElement->calculateAnimatedLocalTransform()));
} else {
m_localTransform = 0;
}
}
void SVGRenderSupport::updateMaskedAncestorShouldIsolateBlending(const RenderElement& renderer)
{
ASSERT(renderer.element());
ASSERT(renderer.element()->isSVGElement());
bool maskedAncestorShouldIsolateBlending = renderer.style().hasBlendMode();
for (auto* ancestor = renderer.element()->parentElement(); ancestor && ancestor->isSVGElement(); ancestor = ancestor->parentElement()) {
if (!toSVGElement(ancestor)->isSVGGraphicsElement() || !isolatesBlending(*ancestor->computedStyle()))
continue;
if (ancestor->computedStyle()->svgStyle().hasMasker())
toSVGGraphicsElement(ancestor)->setShouldIsolateBlending(maskedAncestorShouldIsolateBlending);
return;
}
}
void SVGUseElement::toClipPath(Path& path)
{
ASSERT(path.isEmpty());
Node* n = m_targetElementInstance ? m_targetElementInstance->shadowTreeElement() : 0;
if (!n)
return;
if (n->isSVGElement() && toSVGElement(*n).isSVGGraphicsElement()) {
if (!isDirectReference(toSVGElement(*n))) {
// Spec: Indirect references are an error (14.3.5)
document().accessSVGExtensions()->reportError("Not allowed to use indirect reference in <clip-path>");
} else {
toSVGGraphicsElement(*n).toClipPath(path);
// FIXME: Avoid manual resolution of x/y here. Its potentially harmful.
SVGLengthContext lengthContext(this);
path.translate(FloatSize(x().value(lengthContext), y().value(lengthContext)));
path.transform(animatedLocalTransform());
}
}
}
SVGGraphicsElement* SVGUseElement::targetGraphicsElementForClipping() const
{
Node* n = userAgentShadowRoot()->firstChild();
if (!n || !n->isSVGElement())
return nullptr;
SVGElement& element = toSVGElement(*n);
if (!element.isSVGGraphicsElement())
return nullptr;
// Spec: "If a <use> element is a child of a clipPath element, it must directly
// reference <path>, <text> or basic shapes elements. Indirect references are an
// error and the clipPath element must be ignored."
// http://dev.w3.org/fxtf/css-masking-1/#the-clip-path
if (!isDirectReference(element)) {
// Spec: Indirect references are an error (14.3.5)
document().accessSVGExtensions().reportError("Not allowed to use indirect reference in <clip-path>");
return nullptr;
}
return &toSVGGraphicsElement(element);
}
bool LayoutSVGTransformableContainer::calculateLocalTransform()
{
SVGGraphicsElement* element = toSVGGraphicsElement(this->element());
ASSERT(element);
// If we're either the layoutObject for a <use> element, or for any <g> element inside the shadow
// tree, that was created during the use/symbol/svg expansion in SVGUseElement. These containers
// need to respect the translations induced by their corresponding use elements x/y attributes.
SVGUseElement* useElement = nullptr;
if (isSVGUseElement(*element)) {
useElement = toSVGUseElement(element);
} else if (isSVGGElement(*element) && toSVGGElement(element)->inUseShadowTree()) {
SVGElement* correspondingElement = element->correspondingElement();
if (isSVGUseElement(correspondingElement))
useElement = toSVGUseElement(correspondingElement);
}
if (useElement) {
SVGLengthContext lengthContext(useElement);
FloatSize translation(
useElement->x()->currentValue()->value(lengthContext),
useElement->y()->currentValue()->value(lengthContext));
if (translation != m_additionalTranslation)
m_needsTransformUpdate = true;
m_additionalTranslation = translation;
}
m_didTransformToRootUpdate = m_needsTransformUpdate || SVGLayoutSupport::transformToRootChanged(parent());
if (!m_needsTransformUpdate)
return false;
m_localTransform = element->calculateAnimatedLocalTransform();
m_localTransform.translate(m_additionalTranslation.width(), m_additionalTranslation.height());
m_needsTransformUpdate = false;
return true;
}
bool RenderSVGResourceClipper::tryPathOnlyClipping(GraphicsContext* context,
const AffineTransform& animatedLocalTransform, const FloatRect& objectBoundingBox) {
// If the current clip-path gets clipped itself, we have to fallback to masking.
if (!style()->svgStyle().clipperResource().isEmpty())
return false;
WindRule clipRule = RULE_NONZERO;
Path clipPath = Path();
for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
RenderObject* renderer = childElement->renderer();
if (!renderer)
continue;
// Only shapes or paths are supported for direct clipping. We need to fallback to masking for texts.
if (renderer->isSVGText())
return false;
if (!childElement->isSVGGraphicsElement())
continue;
SVGGraphicsElement* styled = toSVGGraphicsElement(childElement);
RenderStyle* style = renderer->style();
if (!style || style->display() == NONE || style->visibility() != VISIBLE)
continue;
const SVGRenderStyle& svgStyle = style->svgStyle();
// Current shape in clip-path gets clipped too. Fallback to masking.
if (!svgStyle.clipperResource().isEmpty())
return false;
if (clipPath.isEmpty()) {
// First clip shape.
styled->toClipPath(clipPath);
clipRule = svgStyle.clipRule();
clipPath.setWindRule(clipRule);
continue;
}
if (RuntimeEnabledFeatures::pathOpsSVGClippingEnabled()) {
// Attempt to generate a combined clip path, fall back to masking if not possible.
Path subPath;
styled->toClipPath(subPath);
subPath.setWindRule(svgStyle.clipRule());
if (!clipPath.unionPath(subPath))
return false;
} else {
return false;
}
}
// Only one visible shape/path was found. Directly continue clipping and transform the content to userspace if necessary.
if (clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
AffineTransform transform;
transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
clipPath.transform(transform);
}
// Transform path by animatedLocalTransform.
clipPath.transform(animatedLocalTransform);
// The SVG specification wants us to clip everything, if clip-path doesn't have a child.
if (clipPath.isEmpty())
clipPath.addRect(FloatRect());
context->clipPath(clipPath, clipRule);
return true;
}
