static void updateContainerOffset(SVGElementInstance* targetInstance)
{
// Depth-first used to write the method in early exit style, no particular other reason.
for (SVGElementInstance* instance = targetInstance->firstChild(); instance; instance = instance->nextSibling())
updateContainerOffset(instance);
SVGElement* correspondingElement = targetInstance->correspondingElement();
ASSERT(correspondingElement);
if (!correspondingElement->hasTagName(SVGNames::useTag))
return;
SVGElement* shadowTreeElement = targetInstance->shadowTreeElement();
ASSERT(shadowTreeElement);
ASSERT(shadowTreeElement->hasTagName(SVGNames::gTag));
if (!static_cast<SVGGElement*>(shadowTreeElement)->isShadowTreeContainerElement())
return;
// Spec: An additional transformation translate(x,y) is appended to the end
// (i.e., right-side) of the transform attribute on the generated 'g', where x
// and y represent the values of the x and y attributes on the 'use' element.
SVGUseElement* useElement = static_cast<SVGUseElement*>(correspondingElement);
SVGShadowTreeContainerElement* containerElement = static_cast<SVGShadowTreeContainerElement*>(shadowTreeElement);
containerElement->setContainerOffset(useElement->x(), useElement->y());
}
void SVGUseElement::updateContainerOffsets()
{
if (!m_targetElementInstance)
return;
// Update root container offset (not reachable through instance tree)
SVGElement* shadowRoot = m_targetElementInstance->shadowTreeElement();
ASSERT(shadowRoot);
Node* parentNode = shadowRoot->parentNode();
ASSERT(parentNode);
ASSERT(parentNode->isSVGElement());
ASSERT(parentNode->hasTagName(SVGNames::gTag));
ASSERT(static_cast<SVGGElement*>(parentNode)->isShadowTreeContainerElement());
SVGShadowTreeContainerElement* containerElement = static_cast<SVGShadowTreeContainerElement*>(parentNode);
containerElement->setContainerOffset(x(), y());
// Update whole subtree, scanning for shadow container elements, marking a cloned use subtree
updateContainerOffset(m_targetElementInstance.get());
if (renderer())
renderer()->setNeedsLayout(true);
}
void SVGUseElement::updateContainerOffsets()
{
if (!m_targetElementInstance)
return;
// Update root container offset (not reachable through instance tree)
SVGElement* shadowRoot = m_targetElementInstance->shadowTreeElement();
ASSERT(shadowRoot);
ContainerNode* parentNode = shadowRoot->parentNode();
ASSERT(parentNode);
ASSERT(parentNode->isSVGElement());
ASSERT(parentNode->hasTagName(SVGNames::gTag));
ASSERT(static_cast<SVGGElement*>(parentNode)->isShadowTreeContainerElement());
SVGShadowTreeContainerElement* containerElement = static_cast<SVGShadowTreeContainerElement*>(parentNode);
containerElement->setContainerOffset(x(), y());
// Update whole subtree, scanning for shadow container elements, marking a cloned use subtree
updateContainerOffset(m_targetElementInstance.get());
if (RenderObject* object = renderer())
RenderSVGResource::markForLayoutAndParentResourceInvalidation(object);
}
