static bool isViewportElement(const Element& element)
{
return (isSVGSVGElement(element)
|| isSVGSymbolElement(element)
|| isSVGForeignObjectElement(element)
|| isSVGImageElement(element));
}
bool SVGImage::currentFrameHasSingleSecurityOrigin() const
{
if (!m_page)
return true;
LocalFrame* frame = toLocalFrame(m_page->mainFrame());
RELEASE_ASSERT(frame->document()->loadEventFinished());
SVGSVGElement* rootElement = frame->document()->accessSVGExtensions().rootElement();
if (!rootElement)
return true;
// Don't allow foreignObject elements or images that are not known to be
// single-origin since these can leak cross-origin information.
for (Node* node = rootElement; node; node = ComposedTreeTraversal::next(*node)) {
if (isSVGForeignObjectElement(*node))
return false;
if (isSVGImageElement(*node)) {
if (!toSVGImageElement(*node).currentFrameHasSingleSecurityOrigin())
return false;
} else if (isSVGFEImageElement(*node)) {
if (!toSVGFEImageElement(*node).currentFrameHasSingleSecurityOrigin())
return false;
}
}
// Because SVG image rendering disallows external resources and links, these
// images effectively are restricted to a single security origin.
return true;
}
bool SVGElement::isOutermostSVGSVGElement() const
{
if (!isSVGSVGElement(*this))
return false;
// Element may not be in the document, pretend we're outermost for viewport(), getCTM(), etc.
if (!parentNode())
return true;
// We act like an outermost SVG element, if we're a direct child of a <foreignObject> element.
if (isSVGForeignObjectElement(*parentNode()))
return true;
// If we're living in a shadow tree, we're a <svg> element that got created as replacement
// for a <symbol> element or a cloned <svg> element in the referenced tree. In that case
// we're always an inner <svg> element.
if (inUseShadowTree() && parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement())
return false;
// This is true whenever this is the outermost SVG, even if there are HTML elements outside it
return !parentNode()->isSVGElement();
}
static bool isSVGText(Text* text)
{
Node* parentOrShadowHostNode = text->parentOrShadowHostNode();
ASSERT(parentOrShadowHostNode);
return parentOrShadowHostNode->isSVGElement() && !isSVGForeignObjectElement(*parentOrShadowHostNode);
}