String SVGElement::title() const
{
// According to spec, we should not return titles when hovering over root <svg> elements (those
// <title> elements are the title of the document, not a tooltip) so we instantly return.
if (isOutermostSVGSVGElement())
return String();
// Walk up the tree, to find out whether we're inside a <use> shadow tree, to find the right title.
if (isInShadowTree()) {
Element* shadowHostElement = toShadowRoot(treeScope().rootNode()).host();
// At this time, SVG nodes are not allowed in non-<use> shadow trees, so any shadow root we do
// have should be a use. The assert and following test is here to catch future shadow DOM changes
// that do enable SVG in a shadow tree.
ASSERT(!shadowHostElement || isSVGUseElement(*shadowHostElement));
if (isSVGUseElement(shadowHostElement)) {
SVGUseElement& useElement = toSVGUseElement(*shadowHostElement);
// If the <use> title is not empty we found the title to use.
String useTitle(useElement.title());
if (!useTitle.isEmpty())
return useTitle;
}
}
// If we aren't an instance in a <use> or the <use> title was not found, then find the first
// <title> child of this element.
// If a title child was found, return the text contents.
if (Element* titleElement = Traversal<SVGTitleElement>::firstChild(*this))
return titleElement->innerText();
// Otherwise return a null/empty string.
return String();
}
String SVGElement::title() const
{
// According to spec, we should not return titles when hovering over root <svg> elements (those
// <title> elements are the title of the document, not a tooltip) so we instantly return.
if (isOutermostSVGSVGElement())
return String();
if (inUseShadowTree()) {
String useTitle(shadowHost()->title());
if (!useTitle.isEmpty())
return useTitle;
}
// If we aren't an instance in a <use> or the <use> title was not found, then find the first
// <title> child of this element.
// If a title child was found, return the text contents.
if (Element* titleElement = Traversal<SVGTitleElement>::firstChild(*this))
return titleElement->innerText();
// Otherwise return a null/empty string.
return String();
}
