static void updateContainerSize(SVGUseElement* useElement, 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())
updateContainerSize(useElement, instance);
SVGElement* correspondingElement = targetInstance->correspondingElement();
ASSERT(correspondingElement);
bool isSymbolTag = correspondingElement->hasTagName(SVGNames::symbolTag);
if (!correspondingElement->hasTagName(SVGNames::svgTag) && !isSymbolTag)
return;
SVGElement* shadowTreeElement = targetInstance->shadowTreeElement();
ASSERT(shadowTreeElement);
ASSERT(shadowTreeElement->hasTagName(SVGNames::svgTag));
// Spec (<use> on <symbol>): This generated 'svg' will always have explicit values for attributes width and height.
// If attributes width and/or height are provided on the 'use' element, then these attributes
// will be transferred to the generated 'svg'. If attributes width and/or height are not specified,
// the generated 'svg' element will use values of 100% for these attributes.
// Spec (<use> on <svg>): If attributes width and/or height are provided on the 'use' element, then these
// values will override the corresponding attributes on the 'svg' in the generated tree.
if (useElement->hasAttribute(SVGNames::widthAttr))
shadowTreeElement->setAttribute(SVGNames::widthAttr, useElement->getAttribute(SVGNames::widthAttr));
else if (isSymbolTag && shadowTreeElement->hasAttribute(SVGNames::widthAttr))
shadowTreeElement->setAttribute(SVGNames::widthAttr, "100%");
if (useElement->hasAttribute(SVGNames::heightAttr))
shadowTreeElement->setAttribute(SVGNames::heightAttr, useElement->getAttribute(SVGNames::heightAttr));
else if (isSymbolTag && shadowTreeElement->hasAttribute(SVGNames::heightAttr))
shadowTreeElement->setAttribute(SVGNames::heightAttr, "100%");
}
void SVGUseElement::updateContainerSizes()
{
if (!m_targetElementInstance)
return;
// Update whole subtree, scanning for shadow container elements, that correspond to <svg>/<symbol> tags
updateContainerSize(this, m_targetElementInstance.get());
if (renderer())
renderer()->setNeedsLayout(true);
}
void SVGUseElement::updateContainerSizes()
{
if (!m_targetElementInstance)
return;
// Update whole subtree, scanning for shadow container elements, that correspond to <svg>/<symbol> tags
updateContainerSize(this, m_targetElementInstance.get());
if (RenderObject* object = renderer())
RenderSVGResource::markForLayoutAndParentResourceInvalidation(object);
}
