void SVGUseElement::expandUseElementsInShadowTree(SVGShadowTreeRootElement* shadowRoot, Node* element)
{
// Why expand the <use> elements in the shadow tree here, and not just
// do this directly in buildShadowTree, if we encounter a <use> element?
//
// Short answer: Because we may miss to expand some elements. Ie. if a <symbol>
// contains <use> tags, we'd miss them. So once we're done with settin' up the
// actual shadow tree (after the special case modification for svg/symbol) we have
// to walk it completely and expand all <use> elements.
if (element->hasTagName(SVGNames::useTag)) {
SVGUseElement* use = static_cast<SVGUseElement*>(element);
String id = SVGURIReference::getTarget(use->href());
Element* targetElement = document()->getElementById(id);
SVGElement* target = 0;
if (targetElement && targetElement->isSVGElement())
target = static_cast<SVGElement*>(targetElement);
// Don't ASSERT(target) here, it may be "pending", too.
// Setup sub-shadow tree root node
RefPtr<SVGShadowTreeContainerElement> cloneParent = new SVGShadowTreeContainerElement(document());
// Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
// 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
transferUseAttributesToReplacedElement(use, cloneParent.get());
ExceptionCode ec = 0;
if (target && !isDisallowedElement(target)) {
RefPtr<Element> newChild = target->cloneElementWithChildren();
// We don't walk the target tree element-by-element, and clone each element,
// but instead use cloneElementWithChildren(). This is an optimization for the common
// case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
// Though if there are disallowed elements in the subtree, we have to remove them.
// For instance: <use> on <g> containing <foreignObject> (indirect case).
if (subtreeContainsDisallowedElement(newChild.get()))
removeDisallowedElementsFromSubtree(newChild.get());
SVGElement* newChildPtr = 0;
if (newChild->isSVGElement())
newChildPtr = static_cast<SVGElement*>(newChild.get());
ASSERT(newChildPtr);
cloneParent->appendChild(newChild.release(), ec);
ASSERT(!ec);
}
// Replace <use> with referenced content.
ASSERT(use->parentNode());
use->parentNode()->replaceChild(cloneParent.release(), use, ec);
ASSERT(!ec);
// Immediately stop here, and restart expanding.
expandUseElementsInShadowTree(shadowRoot, shadowRoot);
return;
}
for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling())
expandUseElementsInShadowTree(shadowRoot, child.get());
}
void SVGUseElement::expandUseElementsInShadowTree(Node* element)
{
// Why expand the <use> elements in the shadow tree here, and not just
// do this directly in buildShadowTree, if we encounter a <use> element?
//
// Short answer: Because we may miss to expand some elements. Ie. if a <symbol>
// contains <use> tags, we'd miss them. So once we're done with settin' up the
// actual shadow tree (after the special case modification for svg/symbol) we have
// to walk it completely and expand all <use> elements.
if (element->hasTagName(SVGNames::useTag)) {
SVGUseElement* use = toSVGUseElement(element);
ASSERT(!use->cachedDocumentIsStillLoading());
ASSERT(referencedDocument());
Element* targetElement = SVGURIReference::targetElementFromIRIString(use->href(), *referencedDocument());
SVGElement* target = 0;
if (targetElement && targetElement->isSVGElement())
target = toSVGElement(targetElement);
// Don't ASSERT(target) here, it may be "pending", too.
// Setup sub-shadow tree root node
RefPtr<SVGGElement> cloneParent = SVGGElement::create(SVGNames::gTag, *referencedDocument());
use->cloneChildNodes(cloneParent.get());
// Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
// 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
transferUseAttributesToReplacedElement(use, cloneParent.get());
if (target && !isDisallowedElement(*target)) {
RefPtr<Element> newChild = target->cloneElementWithChildren();
ASSERT(newChild->isSVGElement());
cloneParent->appendChild(newChild.release());
}
// We don't walk the target tree element-by-element, and clone each element,
// but instead use cloneElementWithChildren(). This is an optimization for the common
// case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
// Though if there are disallowed elements in the subtree, we have to remove them.
// For instance: <use> on <g> containing <foreignObject> (indirect case).
if (subtreeContainsDisallowedElement(*cloneParent))
removeDisallowedElementsFromSubtree(*cloneParent);
RefPtr<Node> replacingElement(cloneParent.get());
// Replace <use> with referenced content.
ASSERT(use->parentNode());
use->parentNode()->replaceChild(cloneParent.release(), use);
// Expand the siblings because the *element* is replaced and we will
// lose the sibling chain when we are back from recursion.
element = replacingElement.get();
for (RefPtr<Node> sibling = element->nextSibling(); sibling; sibling = sibling->nextSibling())
expandUseElementsInShadowTree(sibling.get());
}
for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling())
expandUseElementsInShadowTree(child.get());
}
bool SVGUseElement::expandUseElementsInShadowTree(SVGElement* element)
{
ASSERT(element);
// Why expand the <use> elements in the shadow tree here, and not just
// do this directly in buildShadowTree, if we encounter a <use> element?
//
// Short answer: Because we may miss to expand some elements. For example, if a <symbol>
// contains <use> tags, we'd miss them. So once we're done with setting up the
// actual shadow tree (after the special case modification for svg/symbol) we have
// to walk it completely and expand all <use> elements.
if (isSVGUseElement(*element)) {
SVGUseElement* use = toSVGUseElement(element);
ASSERT(!use->resourceIsStillLoading());
SVGElement* target = 0;
if (hasCycleUseReferencing(toSVGUseElement(use->correspondingElement()), use, target))
return false;
if (target && isDisallowedElement(target))
return false;
// Don't ASSERT(target) here, it may be "pending", too.
// Setup sub-shadow tree root node
RefPtrWillBeRawPtr<SVGGElement> cloneParent = SVGGElement::create(referencedScope()->document());
cloneParent->setCorrespondingElement(use->correspondingElement());
// Move already cloned elements to the new <g> element
for (RefPtrWillBeRawPtr<Node> child = use->firstChild(); child; ) {
RefPtrWillBeRawPtr<Node> nextChild = child->nextSibling();
cloneParent->appendChild(child);
child = nextChild.release();
}
// Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
// 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
transferUseAttributesToReplacedElement(use, cloneParent.get());
if (target) {
RefPtrWillBeRawPtr<Node> newChild = cloneNodeAndAssociate(*target);
ASSERT(newChild->isSVGElement());
transferUseWidthAndHeightIfNeeded(*use, toSVGElement(newChild.get()), *target);
cloneParent->appendChild(newChild.release());
}
// We don't walk the target tree element-by-element, and clone each element,
// but instead use cloneElementWithChildren(). This is an optimization for the common
// case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
// Though if there are disallowed elements in the subtree, we have to remove them.
// For instance: <use> on <g> containing <foreignObject> (indirect case).
if (subtreeContainsDisallowedElement(cloneParent.get()))
removeDisallowedElementsFromSubtree(*cloneParent);
RefPtrWillBeRawPtr<SVGElement> replacingElement(cloneParent.get());
// Replace <use> with referenced content.
ASSERT(use->parentNode());
use->parentNode()->replaceChild(cloneParent.release(), use);
// Expand the siblings because the *element* is replaced and we will
// lose the sibling chain when we are back from recursion.
element = replacingElement.get();
for (RefPtrWillBeRawPtr<SVGElement> sibling = Traversal<SVGElement>::nextSibling(*element); sibling; sibling = Traversal<SVGElement>::nextSibling(*sibling)) {
if (!expandUseElementsInShadowTree(sibling.get()))
return false;
}
}
for (RefPtrWillBeRawPtr<SVGElement> child = Traversal<SVGElement>::firstChild(*element); child; child = Traversal<SVGElement>::nextSibling(*child)) {
if (!expandUseElementsInShadowTree(child.get()))
return false;
}
return true;
}
void SVGUseElement::expandUseElementsInShadowTree(Node* element)
{
// Why expand the <use> elements in the shadow tree here, and not just
// do this directly in buildShadowTree, if we encounter a <use> element?
//
// Short answer: Because we may miss to expand some elements. Ie. if a <symbol>
// contains <use> tags, we'd miss them. So once we're done with settin' up the
// actual shadow tree (after the special case modification for svg/symbol) we have
// to walk it completely and expand all <use> elements.
if (element->hasTagName(SVGNames::useTag)) {
SVGUseElement* use = static_cast<SVGUseElement*>(element);
String id = SVGURIReference::getTarget(use->href());
Element* targetElement = document()->getElementById(id);
SVGElement* target = 0;
if (targetElement && targetElement->isSVGElement())
target = static_cast<SVGElement*>(targetElement);
// Don't ASSERT(target) here, it may be "pending", too.
if (target) {
// Setup sub-shadow tree root node
RefPtr<SVGElement> cloneParent = new SVGGElement(SVGNames::gTag, document());
// Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
// 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
transferUseAttributesToReplacedElement(use, cloneParent.get());
// 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.
if (use->x().value() != 0.0 || use->y().value() != 0.0) {
if (!cloneParent->hasAttribute(SVGNames::transformAttr)) {
String transformString = String::format("translate(%f, %f)", use->x().value(), use->y().value());
cloneParent->setAttribute(SVGNames::transformAttr, transformString);
} else {
String transformString = String::format(" translate(%f, %f)", use->x().value(), use->y().value());
const AtomicString& transformAttribute = cloneParent->getAttribute(SVGNames::transformAttr);
cloneParent->setAttribute(SVGNames::transformAttr, transformAttribute + transformString);
}
}
ExceptionCode ec = 0;
// For instance <use> on <foreignObject> (direct case).
if (isDisallowedElement(target)) {
// We still have to setup the <use> replacment (<g>). Otherwhise
// associateInstancesWithShadowTreeElements() makes wrong assumptions.
// Replace <use> with referenced content.
ASSERT(use->parentNode());
use->parentNode()->replaceChild(cloneParent.release(), use, ec);
ASSERT(ec == 0);
return;
}
RefPtr<Node> newChild = target->cloneNode(true);
// We don't walk the target tree element-by-element, and clone each element,
// but instead use cloneNode(deep=true). This is an optimization for the common
// case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
// Though if there are disallowed elements in the subtree, we have to remove them.
// For instance: <use> on <g> containing <foreignObject> (indirect case).
if (subtreeContainsDisallowedElement(newChild.get()))
removeDisallowedElementsFromSubtree(newChild.get());
SVGElement* newChildPtr = 0;
if (newChild->isSVGElement())
newChildPtr = static_cast<SVGElement*>(newChild.get());
ASSERT(newChildPtr);
cloneParent->appendChild(newChild.release(), ec);
ASSERT(ec == 0);
// Replace <use> with referenced content.
ASSERT(use->parentNode());
use->parentNode()->replaceChild(cloneParent.release(), use, ec);
ASSERT(ec == 0);
// Handle use referencing <svg> special case
if (target->hasTagName(SVGNames::svgTag))
alterShadowTreeForSVGTag(newChildPtr);
// Immediately stop here, and restart expanding.
expandUseElementsInShadowTree(m_shadowTreeRootElement.get());
return;
}
}
for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling())
expandUseElementsInShadowTree(child.get());
}
