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;
}
SVGElement* SVGElement::viewportElement() const
{
// This function needs shadow tree support - as LayoutSVGContainer uses this function
// to determine the "overflow" property. <use> on <symbol> wouldn't work otherwhise.
ContainerNode* n = parentOrShadowHostNode();
while (n) {
if (isSVGSVGElement(*n) || isSVGImageElement(*n) || isSVGSymbolElement(*n))
return toSVGElement(n);
n = n->parentOrShadowHostNode();
}
return nullptr;
}
SVGElement* SVGElement::viewportElement() const
{
// This function needs shadow tree support - as RenderSVGContainer uses this function
// to determine the "overflow" property. <use> on <symbol> wouldn't work otherwhise.
ContainerNode* n = parentOrShadowHostNode();
while (n) {
if (n->hasTagName(SVGNames::svgTag) || isSVGImageElement(n) || n->hasTagName(SVGNames::symbolTag))
return toSVGElement(n);
n = n->parentOrShadowHostNode();
}
return 0;
}
END_REGISTER_ANIMATED_PROPERTIES
inline SVGImageElement::SVGImageElement(const QualifiedName& tagName, Document* document)
: SVGGraphicsElement(tagName, document)
, m_x(LengthModeWidth)
, m_y(LengthModeHeight)
, m_width(LengthModeWidth)
, m_height(LengthModeHeight)
, m_imageLoader(this)
{
ASSERT(isSVGImageElement(this));
registerAnimatedPropertiesForSVGImageElement();
setHasCustomStyleResolveCallbacks();
}
